From 0b97b330c7a9652c84e642ac30f7ed8fe28f2727 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Sun, 12 Jul 2026 13:11:06 -0400 Subject: [PATCH 001/172] =?UTF-8?q?Package=20store:=20event-sourced=20op?= =?UTF-8?q?=20log=20=E2=8A=A5=20projections?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Make the package store event-sourced: the op logs (package_ops, branch_ops, resolutions) are the canonical, append-only source of truth, and the package / location / deprecation tables are projections folded from them. A store "grows" by applying unapplied ops and evaluating values; a schema change is safe (drop projections, re-fold the log). This is the durable, stable base that sync rides on — the append side and the fold side are cleanly split. - Op logs + projections as plain SQLite tables. `Seed.growIfNeeded` applies unapplied ops, regenerates refs, and evaluates values — and self-heals a store that has ops applied but values still NULL (evaluates any NULL rt_dval on startup) instead of leaving it stuck. Value reads are null-safe for a not-yet-evaluated value (returns None, never a NULL crash). The self-heal is silent maintenance — it never prints to stdout. - Convergence: timestamp-LWW by one canonical `origin_ts` (Lww); a synced `resolutions` overlay so a human override travels and peers converge on it; `conflicts` records every auto-resolved divergence (never silent). - Meaning-stable, content-addressed hashing (alpha-normalized) so the same definition hashes identically on every instance — the basis for convergence. - Release / version model and a legacy-DB adopt that runs schema.sql before stamping. Op playback applies branch structure before content. (LibDB, LibExecution, LibSerialization, LocalExec, schema + migrations) Co-Authored-By: Claude Opus 4.8 --- ...260519_133237_package_ops_composite_pk.sql | 27 -- .../20260527_211202_package_description.sql | 4 - backend/migrations/incremental/README.md | 8 +- backend/migrations/schema.sql | 79 +++++- backend/src/LibDB/BranchOpPlayback.fs | 79 ++++-- backend/src/LibDB/Conflicts.fs | 196 +++++++++++++ backend/src/LibDB/Inserts.fs | 45 ++- backend/src/LibDB/LibDB.fsproj | 6 + backend/src/LibDB/Lww.fs | 21 ++ backend/src/LibDB/PackageOpPlayback.fs | 163 ++++++++--- backend/src/LibDB/Releases.fs | 220 +++++++++++++++ backend/src/LibDB/Resolutions.fs | 248 +++++++++++++++++ backend/src/LibDB/RuntimeTypes.fs | 28 +- backend/src/LibDB/Seed.fs | 263 +++++++++++++++++- backend/src/LibDB/Sqlite.fs | 27 +- backend/src/LibExecution/PackageRefs.fs | 10 + backend/src/LibExecution/ProgramTypes.fs | 1 - backend/src/LibExecution/RuntimeTypes.fs | 3 +- .../src/LibSerialization/Hashing/Canonical.fs | 4 +- .../src/LibSerialization/Hashing/Hashing.fs | 255 ++++++++++++++++- backend/src/LocalExec/Migrations.fs | 103 ++++--- 21 files changed, 1627 insertions(+), 163 deletions(-) delete mode 100644 backend/migrations/incremental/20260519_133237_package_ops_composite_pk.sql delete mode 100644 backend/migrations/incremental/20260527_211202_package_description.sql create mode 100644 backend/src/LibDB/Conflicts.fs create mode 100644 backend/src/LibDB/Lww.fs create mode 100644 backend/src/LibDB/Releases.fs create mode 100644 backend/src/LibDB/Resolutions.fs diff --git a/backend/migrations/incremental/20260519_133237_package_ops_composite_pk.sql b/backend/migrations/incremental/20260519_133237_package_ops_composite_pk.sql deleted file mode 100644 index a2a15e31d1..0000000000 --- a/backend/migrations/incremental/20260519_133237_package_ops_composite_pk.sql +++ /dev/null @@ -1,27 +0,0 @@ --- Ghost-function fix: PK was bare `id` (op content hash), so an --- identical op on two branches hashed equal and the second INSERT was --- dropped by `INSERT OR IGNORE` — fn invisible everywhere though `fn` --- printed `✓ Created`. PK becomes (id, branch_id), so IGNORE only --- catches true within-branch repeats. - -DROP TABLE package_ops; - -CREATE TABLE package_ops ( - id TEXT NOT NULL, - op_blob BLOB NOT NULL, - branch_id TEXT NOT NULL REFERENCES branches(id), - commit_hash TEXT REFERENCES commits(hash), - applied INTEGER NOT NULL DEFAULT 0, - propagation_id TEXT NULL, - created_at TIMESTAMP NOT NULL DEFAULT (datetime('now')), - PRIMARY KEY (id, branch_id) -); - -CREATE INDEX IF NOT EXISTS idx_package_ops_wip - ON package_ops(branch_id) WHERE commit_hash IS NULL; -CREATE INDEX IF NOT EXISTS idx_package_ops_created ON package_ops(created_at); -CREATE INDEX IF NOT EXISTS idx_package_ops_applied - ON package_ops(applied) WHERE applied = 0; -CREATE INDEX IF NOT EXISTS idx_package_ops_commit_hash ON package_ops(commit_hash); -CREATE INDEX IF NOT EXISTS idx_package_ops_propagation_id - ON package_ops(propagation_id) WHERE propagation_id IS NOT NULL; diff --git a/backend/migrations/incremental/20260527_211202_package_description.sql b/backend/migrations/incremental/20260527_211202_package_description.sql deleted file mode 100644 index 94ecdcb971..0000000000 --- a/backend/migrations/incremental/20260527_211202_package_description.sql +++ /dev/null @@ -1,4 +0,0 @@ --- Plain-text doc comments for SQL package search. -ALTER TABLE package_types ADD COLUMN description TEXT NOT NULL DEFAULT ''; -ALTER TABLE package_values ADD COLUMN description TEXT NOT NULL DEFAULT ''; -ALTER TABLE package_functions ADD COLUMN description TEXT NOT NULL DEFAULT ''; diff --git a/backend/migrations/incremental/README.md b/backend/migrations/incremental/README.md index d4c400c37d..c0fd816346 100644 --- a/backend/migrations/incremental/README.md +++ b/backend/migrations/incremental/README.md @@ -7,8 +7,12 @@ order on top of `../schema.sql` and name-dedup'd via When to add a file here vs editing `schema.sql`: - **Edit `schema.sql`**: structural redesigns, adding a new table or - column where rebuilding from source is fine. The file is hashed + - kill-and-fill'd; data in the affected tables is lost. + column. The file is hashed; on a change the runtime does a + preserve-and-refold — it drops only the regenerable projection + tables and re-folds them from the op log, so the canonical op + log / blobs / branch+commit state survive. (A canonical-table + *shape* change still needs a Release migration — CREATE IF NOT + EXISTS can't alter an existing table.) - **Add a file here**: data backfills, transforms, additive alterations on populated dev/test DBs you don't want to nuke. diff --git a/backend/migrations/schema.sql b/backend/migrations/schema.sql index 57f5fb7bb8..ceb980b3de 100644 --- a/backend/migrations/schema.sql +++ b/backend/migrations/schema.sql @@ -6,7 +6,7 @@ -- final shape is what runs against an empty DB. -- -- system_migrations_v0 (the legacy per-named-migration table) is the one --- exception, since pre-cutover DBs are adopted via that table; created +-- exception, since legacy DBs are adopted via that table; created -- here AND by Migrations.fs's adoptLegacyDB path. -- -- Order: bookkeeping → branches → commits → ops → package projections → @@ -40,7 +40,8 @@ INSERT OR IGNORE INTO accounts_v0 (id, name) VALUES ('00000000-0000-0000-0000-000000000001', 'Darklang'), ('00000000-0000-0000-0000-000000000002', 'Stachu'), ('00000000-0000-0000-0000-000000000003', 'Paul'), - ('00000000-0000-0000-0000-000000000004', 'Feriel'); + ('00000000-0000-0000-0000-000000000004', 'Feriel'), + ('00000000-0000-0000-0000-000000000005', 'Ocean'); -------------------- @@ -58,6 +59,11 @@ CREATE TABLE IF NOT EXISTS branches ( -- (commits also references branches), but the rows are inserted in -- dependency order at runtime; we don't add a FK constraint here. base_commit_hash TEXT, + -- LWW stamp for base_commit_hash: the (origin_ts, op-id) of the CreateBranch/RebaseBranch that last set it. + -- Concurrent rebases of the same branch on two instances converge (later origin_ts wins, op-id breaks a tie) + -- instead of resolving by arrival order. merged_at/archived_at need no stamp — they're monotonic set-once. + base_ts TEXT NOT NULL DEFAULT '', + base_op TEXT NOT NULL DEFAULT '', archived_at TIMESTAMP NULL, -- soft-delete; replaces hard delete created_at TIMESTAMP NOT NULL DEFAULT (datetime('now')), @@ -89,13 +95,23 @@ CREATE INDEX IF NOT EXISTS idx_commits_branch -- The source of truth for all package changes (branch-scoped). CREATE TABLE IF NOT EXISTS package_ops ( - id TEXT PRIMARY KEY, + id TEXT NOT NULL, op_blob BLOB NOT NULL, branch_id TEXT NOT NULL REFERENCES branches(id), commit_hash TEXT REFERENCES commits(hash), -- NULL = WIP applied INTEGER NOT NULL DEFAULT 0, propagation_id TEXT NULL, -- direct lookup for PropagateUpdate ops - created_at TIMESTAMP NOT NULL DEFAULT (datetime('now')) + created_at TIMESTAMP NOT NULL DEFAULT (datetime('now')), + -- Authoring timestamp, PORTABLE across sync. A + -- locally-authored op self-stamps here at insert; a SYNCED op preserves its origin (the sync + -- receiver writes the peer's value), so every instance agrees on a given op's origin_ts and + -- max(origin_ts) picks the same divergence winner → no swap. Distinct from `created_at` (which + -- is local-insert time and differs per instance for the same op). + origin_ts TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now')), + -- Composite, not bare `id`: an identical op authored on two branches hashes equal (the id is the op's + -- content hash), so a bare-`id` INSERT OR IGNORE would drop the second and the fn would be invisible on + -- that branch. (id, branch_id) lets IGNORE catch only true within-branch repeats. + PRIMARY KEY (id, branch_id) ); CREATE INDEX IF NOT EXISTS idx_package_ops_wip ON package_ops(branch_id) WHERE commit_hash IS NULL; @@ -112,9 +128,46 @@ CREATE TABLE IF NOT EXISTS branch_ops ( id TEXT PRIMARY KEY, -- content-addressed hash of the op op_blob BLOB NOT NULL, -- serialized BranchOp applied INTEGER NOT NULL DEFAULT 0, -- 0=pending, 1=applied (for crash recovery) + -- Authoring stamp, PORTABLE across sync (mirrors package_ops.origin_ts): a locally-authored op self-stamps, + -- a SYNCED op preserves the peer's, so a structural op (rebase) converges by CREATION time (LWW) rather than + -- by arrival order. Distinct from `created_at` (local-insert time, differs per instance for the same op). + origin_ts TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now')), created_at TIMESTAMP NOT NULL DEFAULT (datetime('now')) ); -CREATE INDEX IF NOT EXISTS idx_branch_ops_created_at ON branch_ops(created_at); + + +-------------------- +-- Sync conflicts + resolutions (the "LWW isn't silent" model) +-------------------- +-- sync_conflicts: a LOCAL review log (NOT synced). A divergence auto-resolved by last-writer-wins at pull +-- time is recorded here so it can be reviewed + (optionally) overridden. Per-branch. +CREATE TABLE IF NOT EXISTS sync_conflicts ( + id TEXT PRIMARY KEY, -- content-addressed (branch + location + candidate hashes) + branch_id TEXT NOT NULL, + location TEXT NOT NULL, -- owner.modules.name + item_kind TEXT NOT NULL, -- fn | type | value + local_hash TEXT NOT NULL, -- the content we had + incoming_hash TEXT NOT NULL, -- the content the peer sent + chosen_hash TEXT NOT NULL, -- which won (auto: last-writer-wins) + resolved_by TEXT NOT NULL, -- 'auto:last-writer-wins' | 'human' + status TEXT NOT NULL DEFAULT 'auto-resolved', -- auto-resolved | acknowledged | overridden + detected_at TIMESTAMP NOT NULL DEFAULT (datetime('now')) +); +CREATE INDEX IF NOT EXISTS idx_sync_conflicts_detected_at ON sync_conflicts(detected_at DESC); + +-- resolutions: SYNCED override overlay. A resolution binds a contested location to a chosen content, +-- competing in the same timestamp-LWW that orders bindings (by `at`). id is a wire-carried uuid (idempotent). +-- Effective binding = fold(package_ops)[LWW] -> apply resolutions[last-resolver-wins by `at`]. Per-branch. +CREATE TABLE IF NOT EXISTS resolutions ( + id TEXT PRIMARY KEY, -- wire-carried uuid (INSERT OR IGNORE dedup) + branch_id TEXT NOT NULL, + location TEXT NOT NULL, + item_kind TEXT NOT NULL, + chosen_hash TEXT NOT NULL, -- the content this resolution binds the location to + resolved_by TEXT NOT NULL, -- 'auto:' | 'human' + at TEXT NOT NULL -- LWW stamp (same format as op origin_ts / locations) +); +CREATE INDEX IF NOT EXISTS idx_resolutions_at ON resolutions(at); -------------------- @@ -127,7 +180,8 @@ CREATE TABLE IF NOT EXISTS package_types ( hash TEXT PRIMARY KEY, pt_def BLOB NOT NULL, rt_def BLOB NOT NULL, - created_at TEXT NOT NULL DEFAULT (datetime('now')) + created_at TEXT NOT NULL DEFAULT (datetime('now')), + description TEXT NOT NULL DEFAULT '' -- plain-text doc comment for SQL package search ); CREATE TABLE IF NOT EXISTS package_values ( @@ -135,7 +189,8 @@ CREATE TABLE IF NOT EXISTS package_values ( pt_def BLOB NOT NULL, rt_dval BLOB, -- NULL until evaluated value_type BLOB, -- for finding values of a given ValueType - created_at TEXT NOT NULL DEFAULT (datetime('now')) + created_at TEXT NOT NULL DEFAULT (datetime('now')), + description TEXT NOT NULL DEFAULT '' -- plain-text doc comment for SQL package search ); CREATE INDEX IF NOT EXISTS idx_package_values_type ON package_values(value_type); @@ -143,7 +198,8 @@ CREATE TABLE IF NOT EXISTS package_functions ( hash TEXT PRIMARY KEY, pt_def BLOB NOT NULL, rt_instrs BLOB NOT NULL, - created_at TEXT NOT NULL DEFAULT (datetime('now')) + created_at TEXT NOT NULL DEFAULT (datetime('now')), + description TEXT NOT NULL DEFAULT '' -- plain-text doc comment for SQL package search ); -- Content-addressed bytes (Blob refs). Dedup comes for free via PK @@ -169,7 +225,12 @@ CREATE TABLE IF NOT EXISTS locations ( branch_id TEXT NOT NULL REFERENCES branches(id), commit_hash TEXT REFERENCES commits(hash), -- NULL = WIP created_at TIMESTAMP NOT NULL DEFAULT (datetime('now')), - unlisted_at TIMESTAMP NULL -- set when a later row supersedes this one + unlisted_at TIMESTAMP NULL, -- set when a later row supersedes this one + -- The origin_ts of the op that set THIS binding — the name→authoring-time mapping that lets + -- playback order by CREATION, not arrival (timestamp-LWW). A SetName whose op was created + -- EARLIER than the current binding (an old op arriving late via sync) is stale: playback skips + -- the rebind, so the latest-by-creation name wins on every instance regardless of sync order. + origin_ts TEXT NULL ); CREATE INDEX IF NOT EXISTS idx_locations_branch_lookup ON locations(branch_id, owner, modules, name, item_type) diff --git a/backend/src/LibDB/BranchOpPlayback.fs b/backend/src/LibDB/BranchOpPlayback.fs index f218bcb8c1..22c073f890 100644 --- a/backend/src/LibDB/BranchOpPlayback.fs +++ b/backend/src/LibDB/BranchOpPlayback.fs @@ -17,8 +17,9 @@ open LibSerialization.Hashing /// Apply a BranchOp to the branches/commits tables. /// This is the single source of truth for what each op does — /// mutation sites call insertAndApply, and replay calls applyOp directly. -let applyOp (op : PT.BranchOp) : Task = +let applyOp (op : PT.BranchOp) (originTs : string) : Task = task { + let (Hash opHash) = Hashing.computeBranchOpHash op match op with | PT.BranchOp.CreateBranch(branchId, name, parentBranchId, baseCommitHash) -> let baseCommitHashParam = @@ -34,14 +35,18 @@ let applyOp (op : PT.BranchOp) : Task = do! Sql.query """ - INSERT OR IGNORE INTO branches (id, name, parent_branch_id, base_commit_hash, created_at) - VALUES (@id, @name, @parent_id, @base_commit_hash, datetime('now')) + INSERT OR IGNORE INTO branches + (id, name, parent_branch_id, base_commit_hash, base_ts, base_op, created_at) + VALUES (@id, @name, @parent_id, @base_commit_hash, @base_ts, @base_op, datetime('now')) """ |> Sql.parameters [ "id", Sql.uuid branchId "name", Sql.string name "parent_id", parentIdParam - "base_commit_hash", baseCommitHashParam ] + "base_commit_hash", baseCommitHashParam + // stamp the initial base so a later RebaseBranch with an OLDER origin_ts loses the LWW + "base_ts", Sql.string originTs + "base_op", Sql.string opHash ] |> Sql.executeStatementAsync | PT.BranchOp.CreateCommit(commitHash, message, accountId, branchId, _opHashes) -> @@ -61,14 +66,33 @@ let applyOp (op : PT.BranchOp) : Task = | PT.BranchOp.RebaseBranch(branchId, newBaseCommitHash) -> let (Hash h) = newBaseCommitHash - do! - Sql.query - """ - UPDATE branches SET base_commit_hash = @base_commit_hash WHERE id = @id - """ - |> Sql.parameters - [ "id", Sql.uuid branchId; "base_commit_hash", Sql.string h ] - |> Sql.executeStatementAsync + // LWW-gate: base_commit_hash is a COMPETING value, so a rebase that's older (by origin_ts) than the + // branch's current base — an old rebase arriving late via sync — must lose. `Lww.isStale` is computed + // identically on every instance (origin_ts, op-id tiebreak), so concurrent rebases of the same branch + // converge to the same base regardless of arrival order. (merge/archive are monotonic → no gate.) + let! cur = + Sql.query "SELECT base_ts, base_op FROM branches WHERE id = @id" + |> Sql.parameters [ "id", Sql.uuid branchId ] + |> Sql.executeRowOptionAsync (fun read -> + (read.string "base_ts", read.string "base_op")) + let stale = + match cur with + | Some(curTs, curOp) -> Lww.isStale originTs opHash curTs curOp + | None -> false // branch row absent (shouldn't happen); the UPDATE no-ops anyway + if not stale then + do! + Sql.query + """ + UPDATE branches + SET base_commit_hash = @base_commit_hash, base_ts = @base_ts, base_op = @base_op + WHERE id = @id + """ + |> Sql.parameters + [ "id", Sql.uuid branchId + "base_commit_hash", Sql.string h + "base_ts", Sql.string originTs + "base_op", Sql.string opHash ] + |> Sql.executeStatementAsync | PT.BranchOp.MergeBranch(branchId, intoBranchId) -> let mergeStatements = @@ -130,27 +154,31 @@ let applyOp (op : PT.BranchOp) : Task = } -/// Insert a BranchOp into the branch_ops table and apply it. -/// Uses INSERT OR IGNORE for idempotency (content-addressed by hash). -let insertAndApply (op : PT.BranchOp) : Task = +/// Insert a BranchOp with a SPECIFIC origin_ts (the authoring stamp) into branch_ops and apply it. +/// The RECEIVE path passes the peer's origin_ts (preserved, so the structural LWW converges the same on +/// every instance). INSERT OR IGNORE keeps it idempotent (content-addressed by hash). +let insertAndApplyWithTs (op : PT.BranchOp) (originTs : string) : Task = task { let opHash = Hashing.computeBranchOpHash op let (Hash hashStr) = opHash let opBlob = BS.PT.BranchOp.serialize hashStr op - // Phase 1: Insert with applied=false + // Phase 1: Insert with applied=false, preserving origin_ts let! rowsAffected = Sql.query """ - INSERT OR IGNORE INTO branch_ops (id, op_blob, applied, created_at) - VALUES (@id, @op_blob, 0, datetime('now')) + INSERT OR IGNORE INTO branch_ops (id, op_blob, applied, origin_ts, created_at) + VALUES (@id, @op_blob, 0, @origin_ts, datetime('now')) """ - |> Sql.parameters [ "id", Sql.string hashStr; "op_blob", Sql.bytes opBlob ] + |> Sql.parameters + [ "id", Sql.string hashStr + "op_blob", Sql.bytes opBlob + "origin_ts", Sql.string originTs ] |> Sql.executeNonQueryAsync // Phase 2: Apply if newly inserted (skip if duplicate) if rowsAffected > 0 then - do! applyOp op + do! applyOp op originTs // Phase 3: Mark as applied try @@ -163,3 +191,14 @@ let insertAndApply (op : PT.BranchOp) : Task = $"Warning: Failed to mark BranchOp {hashStr} as applied: {ex.Message}" ) } + +/// Insert a LOCALLY-authored BranchOp (self-stamps a fresh origin_ts) + apply it. Branch ops are rare — +/// a deliberate create/commit/merge/rebase — so a plain UTC-ms stamp is monotonic enough for the LWW, and +/// this keeps the many local-authoring call sites unchanged. +let insertAndApply (op : PT.BranchOp) : Task = + let originTs = + System.DateTime.UtcNow.ToString( + "yyyy-MM-ddTHH:mm:ss.fffZ", + System.Globalization.CultureInfo.InvariantCulture + ) + insertAndApplyWithTs op originTs diff --git a/backend/src/LibDB/Conflicts.fs b/backend/src/LibDB/Conflicts.fs new file mode 100644 index 0000000000..af7eb3c7dd --- /dev/null +++ b/backend/src/LibDB/Conflicts.fs @@ -0,0 +1,196 @@ +/// Conflicts — the LOCAL review log of divergences. A sync conflict (a name bound to two different contents +/// across instances) auto-resolves at PULL TIME by last-writer-wins; the fact that it happened is recorded +/// here so it can be reviewed and — via a synced `Resolution` — overridden. NOT synced: everyone's `main` +/// shares one id, so competing edits are same-branch; only the pull knows an incoming op superseded a +/// different LOCAL binding, so detection lives in the receive path (`detectDivergences`, called from +/// `Seed.receiveOps`). Stored flat in `sync_conflicts` (schema.sql): the location + both candidate hashes, +/// the chosen hash + the policy that chose it, and a status lifecycle (auto-resolved → acknowledged | +/// overridden). +module LibDB.Conflicts + +open System.Threading.Tasks +open FSharp.Control.Tasks + +open Prelude +open Fumble +open LibDB.Sqlite + +module PT = LibExecution.ProgramTypes +module BS = LibSerialization.Binary.Serialization + +/// One recorded conflict. `chosenHash` + `resolvedBy` are the auto-resolution (which content won, and the +/// policy that picked it); `status` is where it is in review. +type Conflict = + { id : string + branchId : System.Guid + location : string + itemKind : string + localHash : string + incomingHash : string + chosenHash : string + resolvedBy : string + status : string } + +/// Canonical "owner.modules.name" for a location (round-trips: owner = first, name = last, modules = middle). +/// Package name components never contain "." (dots separate modules), so this splits back cleanly. +let locationString (loc : PT.PackageLocation) : string = + String.concat "." (loc.owner :: (loc.modules @ [ loc.name ])) + +/// Inverse of `locationString`. +let parseLocation (s : string) : PT.PackageLocation = + let parts = s.Split('.') + + match parts.Length with + | 0 -> { owner = ""; modules = []; name = "" } + | 1 -> { owner = parts[0]; modules = []; name = "" } + | n -> + { owner = parts[0] + modules = parts[1 .. n - 2] |> Array.toList + name = parts[n - 1] } + +/// A content-addressed id for a divergence — same branch+location+candidates always maps to one row, so a +/// re-detected divergence (e.g. re-pull) doesn't duplicate. +let private conflictId + (branchId : System.Guid) + (location : string) + (localHash : string) + (incomingHash : string) + : string = + let raw = $"{branchId}|{location}|{localHash}|{incomingHash}" + + System.Security.Cryptography.SHA256.HashData( + System.Text.Encoding.UTF8.GetBytes raw + ) + |> System.Convert.ToHexString + |> fun s -> s.ToLowerInvariant() + +/// Record an auto-resolved divergence (idempotent — INSERT OR IGNORE on the content-addressed id). +let record + (branchId : System.Guid) + (location : string) + (itemKind : string) + (localHash : string) + (incomingHash : string) + (chosenHash : string) + (resolvedBy : string) + : Task = + Sql.query + """ + INSERT OR IGNORE INTO sync_conflicts + (id, branch_id, location, item_kind, local_hash, incoming_hash, chosen_hash, resolved_by, status) + VALUES + (@id, @branch_id, @location, @item_kind, @local_hash, @incoming_hash, @chosen_hash, @resolved_by, 'auto-resolved') + """ + |> Sql.parameters + [ "id", Sql.string (conflictId branchId location localHash incomingHash) + "branch_id", Sql.string (string branchId) + "location", Sql.string location + "item_kind", Sql.string itemKind + "local_hash", Sql.string localHash + "incoming_hash", Sql.string incomingHash + "chosen_hash", Sql.string chosenHash + "resolved_by", Sql.string resolvedBy ] + |> Sql.executeStatementAsync + +/// All recorded conflicts, newest first. +let list () : Task> = + Sql.query + """ + SELECT id, branch_id, location, item_kind, local_hash, incoming_hash, chosen_hash, resolved_by, status + FROM sync_conflicts + ORDER BY detected_at DESC + """ + |> Sql.executeAsync (fun read -> + { id = read.string "id" + branchId = System.Guid.Parse(read.string "branch_id") + location = read.string "location" + itemKind = read.string "item_kind" + localHash = read.string "local_hash" + incomingHash = read.string "incoming_hash" + chosenHash = read.string "chosen_hash" + resolvedBy = read.string "resolved_by" + status = read.string "status" }) + +/// Acknowledge a conflict — the auto choice stands, just mark it reviewed. +let acknowledge (id : string) : Task = + Sql.query + "UPDATE sync_conflicts SET status = 'acknowledged' WHERE id = @id AND status = 'auto-resolved'" + |> Sql.parameters [ "id", Sql.string id ] + |> Sql.executeStatementAsync + +/// Mark a conflict overridden — a human picked a candidate (recorded as a synced Resolution). +let markOverridden (id : string) : Task = + Sql.query "UPDATE sync_conflicts SET status = 'overridden' WHERE id = @id" + |> Sql.parameters [ "id", Sql.string id ] + |> Sql.executeStatementAsync + +/// The current live binding (item_hash, origin_ts) for a location on a branch, if any. +let private currentBinding + (branchId : System.Guid) + (loc : PT.PackageLocation) + (itemKind : PT.ItemKind) + : Task>> = + Sql.query + """ + SELECT item_hash, origin_ts FROM locations + WHERE owner = @owner AND modules = @modules AND name = @name AND item_type = @item_type + AND branch_id = @branch_id AND unlisted_at IS NULL + LIMIT 1 + """ + |> Sql.parameters + [ "owner", Sql.string loc.owner + "modules", Sql.string (String.concat "." loc.modules) + "name", Sql.string loc.name + "item_type", Sql.string (itemKind.toString ()) + "branch_id", Sql.string (string branchId) ] + |> Sql.executeRowOptionAsync (fun read -> + (read.string "item_hash", read.stringOrNone "origin_ts")) + +/// Detect + record divergences for a batch of RECEIVED ops. Called by `Seed.receiveOps` AFTER the ops are +/// inserted but BEFORE the fold: for each incoming `SetName`, if the name is already bound LOCALLY to a +/// different hash, that's a divergence. The winner is decided by the same timestamp-LWW the fold uses (the +/// incoming op's origin_ts vs the current binding's; exact tie → higher hash), so `chosenHash` matches what +/// the fold will pick — recorded here so LWW is never silent. +let detectDivergences + (events : List) + : Task = + task { + for (opId, opBlob, branchId, _commitHash, originTs) in events do + let op = BS.PT.PackageOp.deserialize (string opId) opBlob + + // Only an op that is ABOUT TO FOLD (applied = 0 after the receive-insert) can introduce a new + // divergence. A re-received op that already folded (applied = 1) must be skipped — otherwise re-pulling + // a long-superseded SetName records a phantom conflict (curBinding is the newer winner, so it looks + // divergent) that surfaces in `dark conflicts` though nothing actually changed. + let! applied = + Sql.query "SELECT applied FROM package_ops WHERE id = @id AND branch_id = @b" + |> Sql.parameters [ "id", Sql.uuid opId; "b", Sql.uuid branchId ] + |> Sql.executeRowOptionAsync (fun read -> read.int64 "applied") + + match op, applied with + | PT.PackageOp.SetName(loc, target), Some 0L -> + let (PT.Hash incomingHash) = target.hash + let! cur = currentBinding branchId loc target.kind + + match cur with + | Some(curHash, curTs) when curHash <> incomingHash -> + // Same LWW rule as applySetName + the resolution overlay — one shared predicate. + let incomingStale = + match curTs with + | Some ct -> Lww.isStale originTs incomingHash ct curHash + | None -> false + + let chosenHash = if incomingStale then curHash else incomingHash + + do! + record + branchId + (locationString loc) + (target.kind.toString ()) + curHash + incomingHash + chosenHash + "auto:last-writer-wins" + | _ -> () + | _ -> () + } diff --git a/backend/src/LibDB/Inserts.fs b/backend/src/LibDB/Inserts.fs index 12e3120d2d..a5d0a0e508 100644 --- a/backend/src/LibDB/Inserts.fs +++ b/backend/src/LibDB/Inserts.fs @@ -24,6 +24,34 @@ let computeOpHash (op : PT.PackageOp) : System.Guid = System.Guid(hashBytes[0..15]) +/// A process-monotonic authoring stamp (`origin_ts`). Millisecond-resolution wall clock, but never +/// non-increasing: within one millisecond a batch's ops would otherwise share a stamp, and the +/// timestamp-LWW in `applySetName` would then break the tie by content hash — silently reordering *local +/// sequential* edits (rename v1 then v2 could leave v1 winning). So each call returns `max(nowMs, last+1ms)`: +/// a local batch gets strictly-increasing stamps, so a later edit always wins its location. The string +/// format matches the schema default `strftime('%Y-%m-%dT%H:%M:%fZ')`, so it stays lexically comparable +/// with existing rows and peers. (A future hardening could generalize this to a hybrid logical clock that +/// also advances the stamp on receive, so a skewed peer clock can't pin a binding.) +let private originTsLock = System.Object() +let mutable private lastOriginTs = System.DateTime.MinValue + +let nextOriginTs () : string = + lock originTsLock (fun () -> + let nowMs = + let n = System.DateTime.UtcNow + System.DateTime( + n.Ticks - (n.Ticks % System.TimeSpan.TicksPerMillisecond), + System.DateTimeKind.Utc + ) + let next = + if nowMs > lastOriginTs then nowMs else lastOriginTs.AddMilliseconds 1.0 + lastOriginTs <- next + next.ToString( + "yyyy-MM-ddTHH:mm:ss.fffZ", + System.Globalization.CultureInfo.InvariantCulture + )) + + /// Insert PackageOps into the package_ops table and apply them to projection tables. /// branchId = branch context /// commitHash = None means WIP (commit_hash = NULL), Some id means committed @@ -55,20 +83,22 @@ let insertAndApplyOps | PT.PackageOp.RevertPropagation(rid, _, _, _, _) -> Some rid | _ -> None) + // Each op gets a strictly-increasing authoring stamp (see `nextOriginTs`), assigned in list order so + // sequential edits within one wall-clock millisecond are still ordered by creation for the LWW. let opsWithIds = ops |> List.map (fun op -> let opId = computeOpHash op let opBlob = BS.PT.PackageOp.serialize opId op - (opId, op, opBlob, batchPropagationId)) + (opId, op, opBlob, batchPropagationId, nextOriginTs ())) let insertStatements = opsWithIds - |> List.map (fun (opId, _op, opBlob, propagationId) -> + |> List.map (fun (opId, _op, opBlob, propagationId, originTs) -> let sql = """ - INSERT OR IGNORE INTO package_ops (id, op_blob, branch_id, applied, commit_hash, propagation_id) - VALUES (@id, @op_blob, @branch_id, @applied, @commit_hash, @propagation_id) + INSERT OR IGNORE INTO package_ops (id, op_blob, branch_id, applied, commit_hash, propagation_id, origin_ts) + VALUES (@id, @op_blob, @branch_id, @applied, @commit_hash, @propagation_id, @origin_ts) """ let commitHashParam = @@ -85,7 +115,8 @@ let insertAndApplyOps "propagation_id", (match propagationId with | Some id -> Sql.uuid id - | None -> Sql.dbnull) ] + | None -> Sql.dbnull) + "origin_ts", Sql.string originTs ] (sql, [ parameters ])) @@ -100,9 +131,9 @@ let insertAndApplyOps |> List.filter (fun (_, affected) -> affected > 0) |> List.map fst - let opsToApply = insertedOpsWithIds |> List.map (fun (_, op, _, _) -> op) + let opsToApply = insertedOpsWithIds |> List.map (fun (_, op, _, _, _) -> op) let insertedOpIds = - insertedOpsWithIds |> List.map (fun (opId, _, _, _) -> opId) + insertedOpsWithIds |> List.map (fun (opId, _, _, _, _) -> opId) do! PackageOpPlayback.applyOps branchId commitHash opsToApply diff --git a/backend/src/LibDB/LibDB.fsproj b/backend/src/LibDB/LibDB.fsproj index 5b55851ff4..07b46ed72c 100644 --- a/backend/src/LibDB/LibDB.fsproj +++ b/backend/src/LibDB/LibDB.fsproj @@ -17,6 +17,7 @@ + @@ -41,10 +42,15 @@ + + + + + diff --git a/backend/src/LibDB/Lww.fs b/backend/src/LibDB/Lww.fs new file mode 100644 index 0000000000..26d68a4fc8 --- /dev/null +++ b/backend/src/LibDB/Lww.fs @@ -0,0 +1,21 @@ +/// The timestamp last-writer-wins staleness rule, in ONE place. +/// +/// A candidate binding LOSES (is "stale") when its authoring stamp is older than the current binding's — or, +/// on an exact stamp tie, when its content hash is the lower of the two (a portable, instance-independent +/// tiebreak). The op-fold (`applySetName`), divergence detection (`Conflicts.detectDivergences`), and the +/// resolution overlay (`Resolutions.applyToLocations`) must ALL apply this identical rule; if any copy drifts, +/// two instances can pick different winners for the same name and silently diverge. Keeping it here makes that +/// impossible by construction. +/// +/// Stamps are the portable `yyyy-MM-ddTHH:mm:ss.fffZ` strings; lexical `<` is chronological for that fixed +/// format, so no parsing is needed. +module LibDB.Lww + +/// True iff binding (newTs, newHash) loses to the live binding (curTs, curHash) under timestamp-LWW. +let isStale + (newTs : string) + (newHash : string) + (curTs : string) + (curHash : string) + : bool = + newTs < curTs || (newTs = curTs && newHash < curHash) diff --git a/backend/src/LibDB/PackageOpPlayback.fs b/backend/src/LibDB/PackageOpPlayback.fs index d918bc9c30..6cdfb45d78 100644 --- a/backend/src/LibDB/PackageOpPlayback.fs +++ b/backend/src/LibDB/PackageOpPlayback.fs @@ -196,7 +196,7 @@ let private applyAddType /// Apply a single AddValue op to the package_values table. /// Note: rt_dval and value_type are stored as NULL here. They are populated -/// in Phase 3 by Seed.evaluateAllValues after all ops are applied, so cross- +/// by Seed.evaluateAllValues after all ops are applied, so cross- /// package references resolve correctly. let private applyAddValue (ctx : Ctx) @@ -276,55 +276,134 @@ let private applySetName let locationId = System.Guid.NewGuid() let (Hash itemHashStr) = itemHash - // 1. Deprecate any existing location at the target path (handles updates) - do! - exec ctx """ - UPDATE locations - SET unlisted_at = datetime('now') - WHERE owner = $owner - AND modules = $modules - AND name = $name - AND item_type = $item_type - AND unlisted_at IS NULL - AND branch_id = $branch_id - """ (fun cmd -> - p cmd "$owner" location.owner - p cmd "$modules" modulesStr - p cmd "$name" location.name - p cmd "$item_type" itemTypeStr - pUuid cmd "$branch_id" branchId) - - // 2. If this is a rename (standalone SetName, not paired with Add*), - // also deprecate old locations pointing to the same hash. - // We do NOT do this for Add+SetName pairs because multiple items can - // legitimately share the same hash (e.g. Int8.ParseError and - // Int16.ParseError have identical definitions). - if isRename then + // ── timestamp-LWW: order this binding by the op's CREATION time, + // not arrival. Read this op's `origin_ts` (the authoring stamp, already in package_ops) and the + // CURRENT binding's `origin_ts` (the name→authoring-time mapping in `locations`). If this op was + // created BEFORE the current binding's op — an old op arriving late via sync — it's stale: keep the + // existing, newer-by-creation binding (the op still lives in the log; it's just not the active name). + // Computed identically on every instance, so all converge to the SAME hash regardless of arrival + // order. Unknown stamps (op not in package_ops / pre-origin_ts data) → no skip = prior last-writer + // behavior, so non-sync playback (seed grow, local authoring) is unchanged. Reads run on ctx.conn so + // they see writes from earlier ops in this same applyOps transaction. + let thisOp = + PT.PackageOp.SetName( + location, + PT.Reference.fromHashAndKind (itemHash, itemKind) + ) + let (Hash thisOpHashStr) = LibSerialization.Hashing.Hashing.computeOpHash thisOp + let thisOpId = System.Guid(System.Convert.FromHexString(thisOpHashStr)[0..15]) + + let! thisTs = + task { + use cmd = ctx.conn.CreateCommand() + // Scope by (id, branch_id) — the composite PK. The same content op can exist on two branches with + // different origin_ts, so an `id`-only lookup could read the wrong branch's stamp and pick a different + // LWW winner across instances. + cmd.CommandText <- + "SELECT origin_ts FROM package_ops WHERE id = $id AND branch_id = $branch_id" + cmd.Parameters.AddWithValue("$id", string thisOpId) + |> ignore + cmd.Parameters.AddWithValue("$branch_id", string branchId) + |> ignore + use! reader = cmd.ExecuteReaderAsync() + let! hasRow = reader.ReadAsync() + if hasRow && not (reader.IsDBNull 0) then + return Some(reader.GetString 0) + else + return None + } + + let! curBinding = + task { + use cmd = ctx.conn.CreateCommand() + cmd.CommandText <- + "SELECT item_hash, origin_ts FROM locations " + + "WHERE owner = $owner AND modules = $modules AND name = $name " + + "AND item_type = $item_type AND branch_id = $branch_id AND unlisted_at IS NULL LIMIT 1" + cmd.Parameters.AddWithValue("$owner", location.owner) + |> ignore + cmd.Parameters.AddWithValue("$modules", modulesStr) + |> ignore + cmd.Parameters.AddWithValue("$name", location.name) + |> ignore + cmd.Parameters.AddWithValue("$item_type", itemTypeStr) + |> ignore + cmd.Parameters.AddWithValue("$branch_id", string branchId) + |> ignore + use! reader = cmd.ExecuteReaderAsync() + let! hasRow = reader.ReadAsync() + if hasRow then + let h = reader.GetString 0 + let ts = if reader.IsDBNull 1 then None else Some(reader.GetString 1) + return Some(h, ts) + else + return None + } + + let isStale = + match curBinding, thisTs with + // Order a binding by its op's CREATION time (origin_ts); a stale op arriving late via sync loses + // to the newer binding. On an EXACT TIE (two DIFFERENT ops for one name stamped the same + // millisecond — a genuine cross-instance race), break deterministically by item hash: the higher + // hash wins. That tie-break is PORTABLE (content, not arrival/rowid), so every instance — and a + // from-scratch projection rebuild — converges on the same winner. Local sequential authoring + // (v2 replacing v1 in one batch) never reaches this tie: `Inserts` self-stamps each op in a + // local batch with a strictly-increasing origin_ts, so v2 is newer-by-creation and just wins. + | Some(curHash, Some curTs), Some t when curHash <> itemHashStr -> + Lww.isStale t itemHashStr curTs curHash + | _ -> false + + if isStale then + return () + else + // 1. Deprecate any existing location at the target path (handles updates) do! exec ctx """ UPDATE locations SET unlisted_at = datetime('now') - WHERE item_hash = $item_hash - AND branch_id = $branch_id + WHERE owner = $owner + AND modules = $modules + AND name = $name + AND item_type = $item_type AND unlisted_at IS NULL + AND branch_id = $branch_id """ (fun cmd -> - p cmd "$item_hash" itemHashStr + p cmd "$owner" location.owner + p cmd "$modules" modulesStr + p cmd "$name" location.name + p cmd "$item_type" itemTypeStr pUuid cmd "$branch_id" branchId) - // 3. Insert new location entry. - do! - exec ctx """ - INSERT INTO locations (location_id, item_hash, owner, modules, name, item_type, branch_id, commit_hash) - VALUES ($location_id, $item_hash, $owner, $modules, $name, $item_type, $branch_id, $commit_hash) - """ (fun cmd -> - pUuid cmd "$location_id" locationId - p cmd "$item_hash" itemHashStr - p cmd "$owner" location.owner - p cmd "$modules" modulesStr - p cmd "$name" location.name - p cmd "$item_type" itemTypeStr - pUuid cmd "$branch_id" branchId - pOpt cmd "$commit_hash" commitHash) + // 2. If this is a rename (standalone SetName, not paired with Add*), also deprecate old locations + // pointing to the same hash. We do NOT do this for Add+SetName pairs because multiple items can + // legitimately share the same hash (e.g. Int8.ParseError and Int16.ParseError). + if isRename then + do! + exec ctx """ + UPDATE locations + SET unlisted_at = datetime('now') + WHERE item_hash = $item_hash + AND branch_id = $branch_id + AND unlisted_at IS NULL + """ (fun cmd -> + p cmd "$item_hash" itemHashStr + pUuid cmd "$branch_id" branchId) + + // 3. Insert new location entry (with origin_ts for cross-instance timestamp-LWW). + do! + exec ctx """ + INSERT INTO locations (location_id, item_hash, owner, modules, name, item_type, branch_id, commit_hash, origin_ts) + VALUES ($location_id, $item_hash, $owner, $modules, $name, $item_type, $branch_id, $commit_hash, $origin_ts) + """ (fun cmd -> + pUuid cmd "$location_id" locationId + p cmd "$item_hash" itemHashStr + p cmd "$owner" location.owner + p cmd "$modules" modulesStr + p cmd "$name" location.name + p cmd "$item_type" itemTypeStr + pUuid cmd "$branch_id" branchId + pOpt cmd "$commit_hash" commitHash + pOpt cmd "$origin_ts" thisTs) } diff --git a/backend/src/LibDB/Releases.fs b/backend/src/LibDB/Releases.fs new file mode 100644 index 0000000000..5cd32b45ea --- /dev/null +++ b/backend/src/LibDB/Releases.fs @@ -0,0 +1,220 @@ +/// The Release migrator — moves a store forward one Release at a time, and REFUSES to open a store from a +/// NEWER Release with older code. +/// +/// A **Release** is the single version coordinate spanning {language/`ProgramTypes`, op-serialization +/// format, SQL schema, content-hashing} — the same integer (`currentRelease`) that gates +/// cross-instance sync also gates whether this binary may open this store. One coordinate, one upgrade. +/// +/// A `Release N` step bundles: +/// 1. a forward, **copy-and-swap** canonical `.sql` — never `DROP`; the op log is preserved, +/// 2. an optional **op-format remap** — re-serialize the whole log once, in one transaction, +/// 3. a **projection refold** — mark ops unapplied; startup regenerates the projections. +/// Projections are dropped+refolded, never migrated. Forward-only; the undo is "restore from a peer" +/// (every peer holds the whole log, so the tailnet is the backup). +/// +/// The current baseline is **Release 3** — a fresh store is born here. The lone registry entry records +/// why 3 is a clean break (meaning-stable hashing redefined every content hash), but because no older +/// store exists, no store ever replays it; the machinery is in place for the first real format change, +/// which appends the next entry. See `releases`. +module LibDB.Releases + +open Prelude + +open Fumble +open LibDB.Sqlite + +/// THE version coordinate: the single integer spanning {language/`ProgramTypes`, op-serialization format, +/// SQL schema, content-hashing}. A store is stamped with this Release; older code refuses to open a store +/// stamped NEWER. Cross-instance sync's wire-format version IS this same integer — one coordinate gates both +/// the local store upgrade and cross-instance compatibility. +let currentRelease : int = 3 + +/// One forward step that ARRIVES at Release `n` (apply it to move a store from `n-1` to `n`). +type Release = + { + /// the Release this step lands on + n : int + /// canonical-table forward migration — copy-and-swap, NEVER drop. "" = no canonical-shape change. + sql : string + /// op-format remap (old `op_blob` bytes → new), only when the serialization format changed. + /// `None` = the op format is unchanged at this step (the common case). + reserialize : (byte[] -> byte[]) option + /// CLEAN-BREAK boundary: when `true`, pre-this-Release data is treated as disposable and the package + /// dataset is CLEARED so the store rebuilds from source (dev) or re-pulls from a same-Release peer + /// (tailnet). Use this only when the change can't be cheaply migrated AND the old data is disposable + /// — e.g. a content-hash redefinition. The default (`false`) is the durable path (sql/reserialize + + /// re-fold). The PRINCIPLE: PT (the op log) is the source of truth and migrates forward; RT-derived + /// data (rt_dval, traces) is never migrated — it's dropped and recomputed from PT. + clearForRebuild : bool + } + + +/// The ordered registry of forward steps. Add an entry when you bump `currentRelease`; the +/// migrator does the rest. Each `n` must be exactly one greater than the previous (see +/// `registryIsWellFormed`). +/// +/// **Release 3 — meaning-stable hashing.** Content hashes are now over the alpha-normalized canonical +/// form, so older `op_blob`s would embed stale hashes and can't be cheaply migrated — hence the +/// CLEAN-BREAK marker (`clearForRebuild`). In practice every store is BORN at Release 3 and never runs +/// this step; it stands as the worked example of the clean-break path and the registry's upper bound. +let releases : Release list = + [ { n = 3; sql = ""; reserialize = None; clearForRebuild = true } ] + + +// ── The pure planning half (unit-tested; takes the registry explicitly so tests inject their own) ── + +/// The steps to move a store from `storeN` up to `codeN`: the entries with `storeN < n <= codeN`, in +/// ascending order. Pure. +let pendingReleases + (registry : Release list) + (storeN : int) + (codeN : int) + : Release list = + registry + |> List.filter (fun r -> r.n > storeN && r.n <= codeN) + |> List.sortBy (fun r -> r.n) + +/// Is the registry well-formed: strictly ascending, **contiguous** (no gaps), no duplicates, and none +/// above `codeRelease`? A gap would silently skip a migration; a dup would double-apply; an entry above +/// the code's Release is unreachable. Pure guard — unit-tested and asserted at boot. +let registryIsWellFormed (registry : Release list) (codeRelease : int) : bool = + let ns = registry |> List.map (fun r -> r.n) + let contiguous = ns |> List.pairwise |> List.forall (fun (a, b) -> b = a + 1) + let distinct = (List.distinct ns) = ns + let noneAboveCode = ns |> List.forall (fun n -> n <= codeRelease) + contiguous && distinct && noneAboveCode + + +// ── The store's Release stamp (a tiny local table, separate from the schema-hash stamp) ── + +let private releaseTable = "release_state_v0" + +/// The Release this store was last stamped at, or `None` if it predates Release tracking (or is fresh). +let storedRelease () : int option = + let exists = + Sql.query "SELECT 1 FROM sqlite_master WHERE type = 'table' AND name = @n" + |> Sql.parameters [ "n", Sql.string releaseTable ] + |> Sql.executeExistsSync + if not exists then + None + else + match + // `release` is a SQLite keyword (SAVEPOINT RELEASE) — quote the column so it can never mis-parse. + Sql.query $"SELECT \"release\" FROM {releaseTable} WHERE id = 0" + |> Sql.execute (fun read -> read.int64 "release") + with + | Ok [ r ] -> Some(int r) + | _ -> None + +/// Stamp the store at Release `n`. +let writeRelease (n : int) : unit = + Sql.query + $"CREATE TABLE IF NOT EXISTS {releaseTable} (id INTEGER PRIMARY KEY, \"release\" INTEGER NOT NULL)" + |> Sql.executeStatementSync + Sql.query $"INSERT OR REPLACE INTO {releaseTable} (id, \"release\") VALUES (0, @r)" + |> Sql.parameters [ "r", Sql.int64 (int64 n) ] + |> Sql.executeStatementSync + + +// ── Applying a step ── + +/// Re-serialize the WHOLE op log once through `remap` (old `op_blob` → new), in a single transaction. +/// The op id is content-addressed over the op's MEANING (a normalized canonical form), not its raw +/// bytes — so a pure *format* change keeps the same id, and we update `op_blob` in place. (A remap that +/// changes an op's meaning/hash is a different, louder operation — the hash-remap path — not this.) +let reserializeLog (remap : byte[] -> byte[]) : unit = + let rows = + Sql.query "SELECT id, branch_id, op_blob FROM package_ops" + |> Sql.execute (fun read -> + (read.string "id", read.string "branch_id", read.bytes "op_blob")) + |> Result.unwrap + let updates = + rows + |> List.map (fun (id, branchId, blob) -> + ("UPDATE package_ops SET op_blob = @blob WHERE id = @id AND branch_id = @branch_id", + [ [ "blob", Sql.bytes (remap blob) + "id", Sql.string id + "branch_id", Sql.string branchId ] ])) + Sql.executeTransactionSync updates |> ignore> + +/// The package dataset cleared by a `clearForRebuild` boundary: the PT op log + blobs, the branch +/// structure, the regenerable projections, and the RT-derived caches (traces). Reload-from-source (dev) +/// repopulates it. We KEEP accounts and user data — only the package world is reset. (`rt_dval` lives in +/// `package_values`, so it's cleared with the projections — RT recomputed from PT.) +let private rebuildClearTables : List = + [ "package_ops"; "package_blobs"; "branches"; "commits"; "branch_ops" ] + @ LibDB.Seed.projectionTables + @ [ "traces"; "trace_fn_calls" ] + +/// Clear the package dataset for a clean-break Release (FK off; the rows go, the tables stay so the +/// next reload/sync refills them). +let clearForRebuildData () : unit = + Sql.query "PRAGMA foreign_keys = OFF" |> Sql.executeStatementSync + for t in rebuildClearTables do + Sql.query (sprintf "DELETE FROM \"%s\"" t) |> Sql.executeStatementSync + +/// Apply one Release step. A CLEAN-BREAK (`clearForRebuild`) clears the package dataset so it rebuilds +/// from source/peer (disposable pre-Release data). Otherwise it's the durable path: the canonical +/// copy-swap `.sql` (if any), then the op-format remap (if any, which marks the log unapplied so startup +/// refolds projections from the new bytes). +let applyRelease (r : Release) : unit = + if r.clearForRebuild then + print + $"Release {r.n}: clean-break boundary — clearing the package dataset; it rebuilds from source / re-pulls from a same-Release peer." + clearForRebuildData () + else + if r.sql <> "" then Sql.query r.sql |> Sql.executeStatementSync + match r.reserialize with + | Some remap -> + reserializeLog remap + Sql.query "UPDATE package_ops SET applied = 0" |> Sql.executeStatementSync + | None -> () + + +// ── The boot guard + forward migrator ── + +/// What `applyPending` decides to do, factored out of the DB-mutating path so the guard is a **pure, +/// unit-testable** function of (storedRelease, codeRelease). +type ReleaseAction = + /// no stored Release → stamp `code` (a fresh store, or a pre-tracking store already at the current format) + | StampFresh + /// store == code → nothing to do (the steady state) + | UpToDate + /// store > code → REFUSE: a newer store; older code would misread the op format + | RefuseNewer of storeN : int + /// store < code → apply these steps in order, then stamp `code` + | Migrate of Release list + +/// Pure: reconcile the store's Release with this binary's. See `ReleaseAction`. Total over the four cases; +/// no DB access — `applyPending` reads/writes the store around it. +let planRelease + (registry : Release list) + (stored : int option) + (codeRelease : int) + : ReleaseAction = + match stored with + | None -> StampFresh + | Some s when s = codeRelease -> UpToDate + | Some s when s > codeRelease -> RefuseNewer s + | Some s -> Migrate(pendingReleases registry s codeRelease) + +/// Reconcile the store's Release with this binary's (`codeRelease = currentRelease`) and execute the +/// decision. The *decision* is `planRelease` (pure, tested); this wraps it with the DB read/write. +let applyPending (codeRelease : int) : unit = + if not (registryIsWellFormed releases codeRelease) then + Exception.raiseInternal + "Release registry is not well-formed (a gap, duplicate, or an entry above the code Release)" + [ "codeRelease", codeRelease ] + match planRelease releases (storedRelease ()) codeRelease with + | UpToDate -> () + | StampFresh -> writeRelease codeRelease + | RefuseNewer s -> + Exception.raiseInternal + $"This store is on Release {s}; this Dark speaks Release {codeRelease}. Upgrade Dark to open it — never open a newer store with older code." + [] + | Migrate steps -> + for r in steps do + let extra = if r.reserialize.IsSome then " + op re-serialize" else "" + print $"Applying Release {r.n} (schema{extra})…" + applyRelease r + writeRelease codeRelease diff --git a/backend/src/LibDB/Resolutions.fs b/backend/src/LibDB/Resolutions.fs new file mode 100644 index 0000000000..515bdab0ea --- /dev/null +++ b/backend/src/LibDB/Resolutions.fs @@ -0,0 +1,248 @@ +/// Resolutions — SYNCED decisions that OVERRIDE the op-fold for a contested name. A divergence auto-resolves +/// by policy (last-writer-wins); a human — or a keep-local policy — can decide differently. That decision is +/// NOT a new op: the op log is authored content; a resolution is a thin overlay that picks among EXISTING +/// candidates. Effective binding = fold(package_ops)[LWW] → then apply resolutions per location +/// [last-resolver-wins by `at`]. A resolution carries its own fresh `at` stamp, so it competes in the SAME +/// timestamp-LWW that orders bindings — which lets a "keep mine" decision propagate where re-emitting the +/// original SetName (same content hash → same op id → no new rowid) could not. Table: `resolutions` +/// (schema.sql); `id` is a uuid carried over the wire so peers apply idempotently (INSERT OR IGNORE). This +/// syncs as the third named EventLog (`resolutions`). +module LibDB.Resolutions + +open System.Threading.Tasks +open FSharp.Control.Tasks + +open Prelude +open Fumble +open LibDB.Sqlite + +module PT = LibExecution.ProgramTypes + +// CLEANUP(resolution-shape): this may be over-specified. (branchId, location, choice) is the flattened +// (branch, PackageLocation, Reference) binding-slot identity `applySetName` uses — correct + tested + +// converges. Revisit once more of the sync UX is exercised: does a resolution want a leaner shape, or a +// genuinely generic "override projection cell X → Y" one that isn't hardwired to package bindings? +/// One resolution: bind `location` to `choice` (a Reference — hash + kind together, NOT two loose strings), +/// decided by `resolvedBy` ("human" or a policy name) at `at`. `id` is the wire-carried idempotency key. +/// `branchId` is load-bearing, not premature generality: bindings are per-branch (a name can even hold a fn +/// AND a type live at once), so `applySetName` keys a binding by (owner, modules, name, item_type, branch_id) +/// — a resolution has to name the same slot, and a synced one must tell a peer WHICH branch to override. +type Resolution = + { id : string + branchId : System.Guid + location : PT.PackageLocation + choice : PT.Reference + resolvedBy : string + at : string } + +/// Mint a resolution for a "keep this candidate" decision. `at` is the resolver time (the same stamp format +/// op origin_ts / locations use), which becomes the LWW stamp the binding competes on. +let mk + (location : PT.PackageLocation) + (choice : PT.Reference) + (resolvedBy : string) + (branchId : System.Guid) + (at : string) + : Resolution = + { id = System.Guid.NewGuid() |> string + branchId = branchId + location = location + choice = choice + resolvedBy = resolvedBy + at = at } + +/// Persist a resolution (idempotent on `id` — a re-pulled resolution from a peer doesn't duplicate). The +/// Reference is flattened to the (chosen_hash, item_kind) columns the wire + `applySetName` speak in. +let record (r : Resolution) : Task = + let (PT.Hash h) = r.choice.hash + + Sql.query + """ + INSERT OR IGNORE INTO resolutions (id, branch_id, location, item_kind, chosen_hash, resolved_by, at) + VALUES (@id, @b, @location, @item_kind, @hash, @by, @at) + """ + |> Sql.parameters + [ "id", Sql.string r.id + "b", Sql.string (string r.branchId) + "location", Sql.string (Conflicts.locationString r.location) + "item_kind", Sql.string (r.choice.kind.toString ()) + "hash", Sql.string h + "by", Sql.string r.resolvedBy + "at", Sql.string r.at ] + |> Sql.executeStatementAsync + +/// Apply a resolution to the `locations` projection — the OVERLAY step. Re-binds the location to the choice +/// content, gated by the SAME timestamp-LWW `applySetName` uses: a resolution whose `at` is older than the +/// live binding's `origin_ts` is stale and skipped (exact tie breaks by the higher content hash, portably). +/// So every instance converges on the same winner regardless of arrival order. +let applyToLocations (r : Resolution) : Task = + task { + let loc = r.location + let modulesStr = String.concat "." loc.modules + let itemTypeStr = r.choice.kind.toString () + let (PT.Hash chosenHash) = r.choice.hash + + let! cur = + Sql.query + """ + SELECT item_hash, origin_ts FROM locations + WHERE owner = @o AND modules = @m AND name = @n AND item_type = @t + AND branch_id = @b AND unlisted_at IS NULL + LIMIT 1 + """ + |> Sql.parameters + [ "o", Sql.string loc.owner + "m", Sql.string modulesStr + "n", Sql.string loc.name + "t", Sql.string itemTypeStr + "b", Sql.string (string r.branchId) ] + |> Sql.executeRowOptionAsync (fun read -> + (read.string "item_hash", read.stringOrNone "origin_ts")) + + let skip = + match cur with + // already bound to the choice content — idempotent no-op (so a re-pulled resolution doesn't churn) + | Some(curHash, _) when curHash = chosenHash -> true + // stale: older-by-stamp than the live binding (the one shared LWW rule) + | Some(curHash, Some curTs) when curHash <> chosenHash -> + Lww.isStale r.at chosenHash curTs curHash + | _ -> false + + if skip then + return () + else + do! + Sql.query + """ + UPDATE locations SET unlisted_at = datetime('now') + WHERE owner = @o AND modules = @m AND name = @n AND item_type = @t + AND branch_id = @b AND unlisted_at IS NULL + """ + |> Sql.parameters + [ "o", Sql.string loc.owner + "m", Sql.string modulesStr + "n", Sql.string loc.name + "t", Sql.string itemTypeStr + "b", Sql.string (string r.branchId) ] + |> Sql.executeStatementAsync + + do! + Sql.query + """ + INSERT INTO locations + (location_id, item_hash, owner, modules, name, item_type, branch_id, commit_hash, origin_ts) + VALUES (@lid, @hash, @o, @m, @n, @t, @b, NULL, @at) + """ + |> Sql.parameters + [ "lid", Sql.string (System.Guid.NewGuid() |> string) + "hash", Sql.string chosenHash + "o", Sql.string loc.owner + "m", Sql.string modulesStr + "n", Sql.string loc.name + "t", Sql.string itemTypeStr + "b", Sql.string (string r.branchId) + "at", Sql.string r.at ] + |> Sql.executeStatementAsync + } + +/// Record + immediately apply (the local-authoring path: a human / keep-local decision takes effect now). +let recordAndApply (r : Resolution) : Task = + task { + do! record r + do! applyToLocations r + } + +/// Replay EVERY stored resolution (ordered by `at`) onto the `locations` projection — the overlay half of +/// "effective binding = fold(package_ops) → then apply resolutions". A projection rebuild re-folds only the op +/// log, so it must call this afterward or a human override is silently lost (the binding reverts to the LWW +/// loser). Idempotent + LWW-gated per resolution, so replaying an already-applied overlay is a no-op. +let reapplyAll () : Task = + task { + let! rows = + Sql.query + "SELECT id, branch_id, location, item_kind, chosen_hash, resolved_by, at FROM resolutions ORDER BY at ASC" + |> Sql.executeAsync (fun read -> + { id = read.string "id" + branchId = System.Guid.Parse(read.string "branch_id") + location = Conflicts.parseLocation (read.string "location") + choice = + PT.Reference.fromHashAndKind ( + PT.Hash(read.string "chosen_hash"), + PT.ItemKind.fromString (read.string "item_kind") + ) + resolvedBy = read.string "resolved_by" + at = read.string "at" }) + for r in rows do + do! applyToLocations r + } + + +// ── the resolutions log as a synced EventLog (the third named log) ── + +/// Resolutions authored after (rowid), as their field tuple + the new cursor. The sync read +/// for the `resolutions` EventLog — a peer serves these so an override converges everywhere. +let resolutionsSince + (cursor : int64) + (limit : int64) + : Task * int64> = + task { + let! rows = + Sql.query + $"SELECT rowid AS rid, id, branch_id, location, item_kind, chosen_hash, resolved_by, at + FROM resolutions + WHERE rowid > {cursor} + ORDER BY rowid + LIMIT {limit}" + |> Sql.executeAsync (fun read -> + (read.int64 "rid", + read.string "id", + read.string "branch_id", + read.string "location", + read.string "item_kind", + read.string "chosen_hash", + read.string "resolved_by", + read.string "at")) + + let events = + rows |> List.map (fun (_, id, b, l, k, h, by, at) -> (id, b, l, k, h, by, at)) + + let newCursor = + match rows with + | [] -> cursor + | _ -> rows |> List.map (fun (rid, _, _, _, _, _, _, _) -> rid) |> List.max + + return (events, newCursor) + } + +/// Apply resolutions RECEIVED from a peer: record (idempotent by id) + apply to locations (the LWW-gated +/// overlay). Order-independent — each is gated by its own `at` stamp. Returns the count processed. +let receiveResolutions + (events : List) + : Task = + task { + let mutable n = 0L + + for (id, branchId, location, itemKind, chosenHash, resolvedBy, at) in events do + // Count only NEWLY-recorded resolutions (recordAndApply is idempotent on the id), so the puller's + // "Pulled N" is honest on a re-pull — matching the package-op and branch-op counts. + let existed = + Sql.query "SELECT 1 FROM resolutions WHERE id = @id" + |> Sql.parameters [ "id", Sql.string id ] + |> Sql.executeExistsSync + let r : Resolution = + { id = id + branchId = System.Guid.Parse branchId + location = Conflicts.parseLocation location + choice = + PT.Reference.fromHashAndKind ( + PT.Hash chosenHash, + PT.ItemKind.fromString itemKind + ) + resolvedBy = resolvedBy + at = at } + + do! recordAndApply r + if not existed then n <- n + 1L + + return n + } diff --git a/backend/src/LibDB/RuntimeTypes.fs b/backend/src/LibDB/RuntimeTypes.fs index 34581bb5c1..1c9119f7f8 100644 --- a/backend/src/LibDB/RuntimeTypes.fs +++ b/backend/src/LibDB/RuntimeTypes.fs @@ -29,6 +29,12 @@ module Type = module Value = + /// The evaluated runtime value at , or None if there's no such value OR it exists but hasn't + /// been evaluated yet. Unlike types/functions (rt_def/rt_instrs are NOT NULL), `rt_dval` is NULL until a + /// value is evaluated — and a value arrives unevaluated whenever it's folded from an op (e.g. pulled from a + /// peer) before the next grow pass, or if its evaluation errored. The `IS NOT NULL` guard makes that read + /// return None instead of throwing "data is NULL at ordinal 0" on the NULL blob; the caller treats a + /// not-yet-evaluated value the same as an absent one (grow populates it before it's needed in the happy path). let get (hash : Hash) : Ply> = uply { let (Hash hashStr) = hash @@ -37,7 +43,7 @@ module Value = """ SELECT rt_dval FROM package_values - WHERE hash = @hash + WHERE hash = @hash AND rt_dval IS NOT NULL """ |> Sql.parameters [ "hash", Sql.string hashStr ] |> Sql.executeRowOptionAsync (fun read -> read.bytes "rt_dval") @@ -112,6 +118,26 @@ module Blob = return () } + /// Of some offered content hashes, which this store LACKS — sync's fetch-on-miss (blobs don't ride the + /// op stream). Content-addressed, so a hash we have is identical content; only genuinely-absent ones need + /// fetching. + let missing (hashes : List) : Ply> = + uply { + let! present = + Sql.query "SELECT hash FROM package_blobs" + |> Sql.executeAsync (fun read -> read.string "hash") + let presentSet = Set.ofList present + return hashes |> List.filter (fun h -> not (Set.contains h presentSet)) + } + + /// Every content hash this store holds — the sync blob MANIFEST (sender side of fetch-on-miss). + let allHashes () : Ply> = + uply { + return! + Sql.query "SELECT hash FROM package_blobs" + |> Sql.executeAsync (fun read -> read.string "hash") + } + /// Walk a Dval tree and collect every `Persistent` blob hash it /// references. Ephemeral blobs aren't rows in `package_blobs` — they diff --git a/backend/src/LibDB/Seed.fs b/backend/src/LibDB/Seed.fs index fef1ec014e..830d598668 100644 --- a/backend/src/LibDB/Seed.fs +++ b/backend/src/LibDB/Seed.fs @@ -8,6 +8,16 @@ /// /// On CLI startup the grow step runs automatically — if everything is already /// applied it's a single fast SELECT COUNT and returns immediately. +/// +/// This module is also the home of **ops ⊥ projections**: the op log +/// (`package_ops`) is canonical; the package tables (functions/types/values, +/// locations, dependencies, deprecations) are regenerable *projections* folded +/// from it (`projectionTables`). `applyUnappliedOps` folds pending ops (append +/// and fold are separable — the `applied` flag is the seam); `rebuildProjections` +/// drops the projections, marks every op unapplied, and re-folds → byte-identical +/// tables. This is what makes a schema change safe (drop projections, re-fold — +/// the op log is never touched: "durable-canon") and lets a synced peer's ops +/// fold in like any local edit. module LibDB.Seed open System.Threading.Tasks @@ -69,6 +79,7 @@ let export (outputPath : string) : Task = DELETE FROM package_values; DELETE FROM package_functions; DELETE FROM package_dependencies; + DELETE FROM deprecations; DELETE FROM package_ops WHERE branch_id IN ( SELECT id FROM branches WHERE archived_at IS NOT NULL); @@ -112,7 +123,11 @@ let applyUnappliedOps () : Task = SELECT id, op_blob, branch_id, commit_hash FROM package_ops WHERE applied = 0 - ORDER BY created_at ASC + -- rowid (insertion order) is the deterministic tiebreak: created_at is second-resolution, so a + -- batch's ops share it and ordering by created_at alone leaves same-second ops in an unspecified + -- order. The fold's final state is order-independent for the cases that matter (SetName resolves by + -- origin_ts; AddFn is by-hash), but a deterministic replay order keeps re-folds byte-identical. + ORDER BY created_at ASC, rowid ASC """ |> Sql.executeAsync (fun read -> let opId = read.uuid "id" @@ -237,6 +252,235 @@ let applyUnappliedOps () : Task = } +/// The committed events after `cursor` from this instance's own log (≤ `limit`), the commits they +/// reference, and the new cursor (max rowid in the batch, or `cursor` if nothing is new). Exactly what a +/// peer serves — the READ half of the event-log seam. Native (F#) so serving a large batch doesn't pay +/// per-row interpreter overhead (a Dark `List.map` + `Dict.get` over thousands of rows is seconds; this +/// is milliseconds). Each event is (id, opBlobHex, branchId, commitHash, originTs); each commit is +/// (hash, message, branchId, accountId, createdAt). +let eventsSince + (cursor : int64) + (limit : int64) + : Task * + List * + int64> + = + task { + let! opRows = + Sql.query + $"SELECT rowid AS rid, id, hex(op_blob) AS blob, branch_id, commit_hash, origin_ts + FROM package_ops + WHERE rowid > {cursor} AND commit_hash IS NOT NULL + ORDER BY rowid + LIMIT {limit}" + |> Sql.executeAsync (fun read -> + (read.int64 "rid", + read.string "id", + read.string "blob", + read.string "branch_id", + read.string "commit_hash", + read.string "origin_ts")) + + let events = + opRows |> List.map (fun (_, id, blob, br, ch, ts) -> (id, blob, br, ch, ts)) + + let newCursor = + match opRows with + | [] -> cursor + | rows -> rows |> List.map (fun (rid, _, _, _, _, _) -> rid) |> List.max + + // Only the commits the batch's ops reference (rowid in (cursor, newCursor]) — a bounded event batch + // carries a bounded set of commits, never the whole commit history. + let! commits = + Sql.query + $"SELECT DISTINCT c.hash AS hash, c.message AS message, c.branch_id AS branch_id, + c.account_id AS account_id, c.created_at AS created_at + FROM commits c + JOIN package_ops o ON o.commit_hash = c.hash + WHERE o.rowid > {cursor} AND o.rowid <= {newCursor}" + |> Sql.executeAsync (fun read -> + (read.string "hash", + read.string "message", + read.string "branch_id", + read.string "account_id", + read.string "created_at")) + + return (commits, events, newCursor) + } + +/// The branch ops after from this instance's `branch_ops` log, as (id, opBlob-as-hex, originTs) +/// triples, plus the new cursor (max rowid, or if nothing new). Branch ops carry their own +/// structure (branch, commit, merge, …) inside the blob, so — unlike package events — they need no side +/// metadata beyond the authoring stamp. Ordered by rowid so a receiver applies them in the same order +/// (CreateBranch before dependent ops). +let branchOpsSince + (cursor : int64) + (limit : int64) + : Task * int64> = + task { + let! rows = + Sql.query + $"SELECT rowid AS rid, id, hex(op_blob) AS blob, origin_ts + FROM branch_ops + WHERE rowid > {cursor} + ORDER BY rowid + LIMIT {limit}" + |> Sql.executeAsync (fun read -> + (read.int64 "rid", + read.string "id", + read.string "blob", + read.string "origin_ts")) + + // each event carries origin_ts so the receiver's structural LWW (rebase) converges by creation time + let events = rows |> List.map (fun (_, id, blob, ts) -> (id, blob, ts)) + + let newCursor = + match rows with + | [] -> cursor + | _ -> rows |> List.map (fun (rid, _, _, _) -> rid) |> List.max + + return (events, newCursor) + } + +/// Apply branch ops RECEIVED from a peer: deserialize each blob → BranchOp → insertAndApply (idempotent, +/// content-addressed by hash). Applied in order, so CreateBranch lands before the commits/merges that depend +/// on it. Returns the count processed (branch ops are low-volume; the puller advances a per-peer cursor, so a +/// re-pull doesn't re-count in practice). +let receiveBranchOps (events : List) : Task = + task { + let mutable applied = 0L + + for (id, opBlob, originTs) in events do + // Count only NEWLY-applied ops (idempotent on the content-addressed id), so the puller's "Pulled N" + // is honest on a re-pull / shared-base pull — matching the package-op count. + let existed = + Sql.query "SELECT 1 FROM branch_ops WHERE id = @id" + |> Sql.parameters [ "id", Sql.string id ] + |> Sql.executeExistsSync + let op = BS.PT.BranchOp.deserialize id opBlob + // PRESERVE the peer's origin_ts (not a fresh stamp) so the structural LWW converges the same everywhere + do! BranchOpPlayback.insertAndApplyWithTs op originTs + if not existed then applied <- applied + 1L + + return applied + } + +/// Append events RECEIVED from a peer (over HTTP) into the local op log, then fold them into the +/// projections — the general event-log append (`Builtin.appendEvents`). Unlike `insertAndApplyOps` +/// (the LOCAL-authoring path, which stamps a fresh `nextOriginTs`), this PRESERVES each op's original +/// `origin_ts` — essential for the timestamp-LWW to converge the same on every instance regardless of +/// arrival order. Idempotent: `INSERT OR IGNORE` on the content-addressed id, and only unapplied ops +/// fold. Returns the number of ops NEWLY applied (INSERT OR IGNORE skips already-present ones), so a puller +/// reports the real change count. Folding stays here (F#) — invisible to Dark. +let receiveOps + (commits : List) + (events : List) + : Task = + task { + if List.isEmpty events then + return 0L + else + // Insert the referenced commits FIRST (same transaction, in order) so the ops' commit_hash FK is + // satisfied — a synced op belongs to a commit that must exist on the receiver. INSERT OR IGNORE dedups. + // TODO(sync-accounts): a synced commit carries an account_id but accounts don't sync. Today the 5 + // well-known accounts are seeded identically on every instance so it always resolves; FKs are off so a + // missing one wouldn't throw (it'd insert a dangling account_id). When accounts become dynamic, sync + // them (or create-on-receive) rather than assuming the author exists locally. + let commitInserts = + commits + |> List.map (fun (hash, message, branchId, accountId, createdAt) -> + let sql = + """ + INSERT OR IGNORE INTO commits (hash, message, branch_id, account_id, created_at) + VALUES (@hash, @message, @branch_id, @account_id, @created_at) + """ + let ps = + [ "hash", Sql.string hash + "message", Sql.string message + "branch_id", Sql.uuid branchId + "account_id", Sql.uuid accountId + "created_at", Sql.string createdAt ] + (sql, [ ps ])) + + let opInserts = + events + |> List.map (fun (opId, opBlob, branchId, commitHash, originTs) -> + // Convergence fix (canonical origin_ts): the op id is content-only, so two instances that + // independently author the SAME op stamp it with different local `origin_ts`. If we kept + // first-writer's stamp (INSERT OR IGNORE), a later competing edit could resolve differently on each + // instance → permanent divergence. Instead reconcile to the MIN stamp (deterministic on every + // instance), and if that LOWERS an already-applied op's stamp, mark it unapplied so the fold re-runs + // and the binding's `locations.origin_ts` is refreshed to the reconciled value. + let sql = + """ + INSERT INTO package_ops + (id, op_blob, branch_id, applied, commit_hash, propagation_id, origin_ts) + VALUES (@id, @op_blob, @branch_id, @applied, @commit_hash, @propagation_id, @origin_ts) + ON CONFLICT(id, branch_id) DO UPDATE SET + origin_ts = MIN(package_ops.origin_ts, excluded.origin_ts), + applied = + CASE WHEN excluded.origin_ts < package_ops.origin_ts THEN 0 + ELSE package_ops.applied END + """ + let ps = + [ "id", Sql.uuid opId + "op_blob", Sql.bytes opBlob + "branch_id", Sql.uuid branchId + "applied", Sql.bool false + "commit_hash", Sql.string commitHash + "propagation_id", Sql.dbnull + "origin_ts", Sql.string originTs ] + (sql, [ ps ])) + + let _ = (commitInserts @ opInserts) |> Sql.executeTransactionSync + // TODO(receive-atomicity): the insert above, detectDivergences below, and applyUnappliedOps run in + // three separate transactions. A mid-fold throw can leave conflicts recorded for ops that never + // folded — transiently inconsistent, though it self-heals on the next grow. The fix is to thread a + // single transaction/connection through detect + fold (the same connection-threading a true + // multi-store test harness needs), deferred to keep this change off the hot path for now. + // Record any divergences BEFORE the fold: an incoming SetName that rebinds a name already bound + // locally to a different hash is a sync conflict (auto-resolved by LWW). Recorded so it's reviewable. + do! Conflicts.detectDivergences events + // Honest change count = ops that actually FOLD — newly inserted, plus any the MIN-reconcile above + // lowered (marked unapplied) so they re-fold. A pure re-pull folds nothing → 0. (Insert rows-affected + // can't be used now that the op insert is an upsert: a DO UPDATE counts even a no-op re-pull.) + let! foldedCount = applyUnappliedOps () + return foldedCount + } + + +/// The regenerable projections — every table the op-fold writes. `deprecations` is one: it's folded +/// from `Deprecate`/`Undeprecate` ops (its `annotation_blob` reconstructs from the op), so it's +/// regenerable and `export` strips it like the others. NOT `package_blobs` (canonical content — +/// op-playback never writes it), nor the op log / branch / commit / account state. +let projectionTables : List = + [ "package_functions" + "package_types" + "package_values" + "locations" + "package_dependencies" + "deprecations" ] + +/// ops⊥projections: drop every projection table and re-fold the whole `package_ops` log to rebuild them. +/// Projections are regenerable from the ops (the ops⊥projections split) — losing one costs only the CPU to +/// re-fold; the op log is the canonical durable state and is never touched here. This is the schema-change / +/// durable-canon path (drop projections, re-fold). Returns the count of ops re-applied. +let rebuildProjections () : Task = + task { + // 1. clear the regenerable projection tables (single source of truth = projectionTables). + for t in projectionTables do + do! Sql.query $"DELETE FROM {t}" |> Sql.executeStatementAsync + // 2. mark all ops unapplied so the fold reprocesses the whole log + do! Sql.query "UPDATE package_ops SET applied = 0" |> Sql.executeStatementAsync + // 3. re-fold ops -> projections via the existing playback path + let! folded = applyUnappliedOps () + // 4. re-apply the resolutions overlay — the fold only replays package_ops, so without this a human + // override would be lost on rebuild ("effective binding = fold → then apply resolutions"). + do! Resolutions.reapplyAll () + return folded + } + + /// Evaluate all package values that have NULL rt_dval. /// Multi-pass: values may depend on other values, so we retry until convergence. let evaluateAllValues @@ -376,6 +620,17 @@ let growIfNeeded use _span = Telemetry.span "seed.growIfNeeded" [] let! appliedCount = Telemetry.timeTask "seed.applyOps" [] (fun () -> applyUnappliedOps ()) + // A store can have every op applied yet still hold unevaluated values (rt_dval NULL) — e.g. after a + // migration that re-marks ops applied without evaluating, or a store copied/built without a final grow + // (the test seed does exactly this). Gating evaluation on `appliedCount > 0` alone leaves those values + // NULL forever, so the value is unusable ("value not found" — or, before the null-safe read in + // RuntimeTypes.Value.get, an internal NULL crash). Evaluate whenever any value is unevaluated so the + // store self-heals on startup. Refs only need regenerating when we actually applied new ops. + let! hasUnevaluatedValues = + Sql.query + "SELECT EXISTS(SELECT 1 FROM package_values WHERE rt_dval IS NULL) AS has_null" + |> Sql.executeRowAsync (fun read -> read.int64 "has_null") + |> Task.map (fun n -> n > 0L) if appliedCount > 0L then log $"Growing package DB from ops ({appliedCount} ops to apply)..." Telemetry.event "seed.applyOps.count" [ ("count", string appliedCount) ] @@ -385,13 +640,17 @@ let growIfNeeded do! PackageRefsGenerator.generate () LibExecution.PackageRefs.reloadHashes () }) + if appliedCount > 0L || hasUnevaluatedValues then let! _evalResult = Telemetry.timeTask "seed.evaluateValues" [] (fun () -> evaluateAllValues (getBuiltins ()) pm) do! Telemetry.timeTask "seed.walCheckpoint" [] (fun () -> Sql.query "PRAGMA wal_checkpoint(TRUNCATE);" |> Sql.executeStatementAsync) - log "Package DB ready" + // Announce only when we grew from real op work; a pure self-heal (evaluating stray unevaluated values + // with no new ops) is silent maintenance — it must not print to stdout, or it pollutes captured CLI + // output (e.g. a caller comparing exact command output). + if appliedCount > 0L then log "Package DB ready" return true else return false diff --git a/backend/src/LibDB/Sqlite.fs b/backend/src/LibDB/Sqlite.fs index 7e465ef279..71f4b0876a 100644 --- a/backend/src/LibDB/Sqlite.fs +++ b/backend/src/LibDB/Sqlite.fs @@ -10,9 +10,15 @@ open Fumble open Prelude -let connString = +let private defaultConnString = $"Data Source={LibConfig.Config.dbPath};Mode=ReadWriteCreate;Cache=Private;Pooling=true" +// `mutable` only so tests can repoint LibDB at a fresh store (see `Sql.useStoreForTesting`). Production never +// rebinds it. Both the Fumble `connect` AND the raw-ADO fold path (`applyOps` opens `new SqliteConnection +// connString`) read this, so a test swap redirects ALL of LibDB — inserts, reads, and the fold — at the +// instance store. +let mutable connString = defaultConnString + module Sql = // Initialize connection with PRAGMA settings that can't be set in the connection string let initializeConnection (props : Sql.SqlProps) : Sql.SqlProps = @@ -28,7 +34,24 @@ module Sql = props - let connect = Sql.connect connString |> initializeConnection + // `mutable` only so tests can repoint LibDB at a fresh store (see `useStoreForTesting`). Production + // never rebinds it — it stays the default `connString` store for the process's life. + let mutable connect = Sql.connect connString |> initializeConnection + + /// TEST-ONLY: repoint LibDB at the store file at `path` (created if missing), so a test can run true + /// multi-instance scenarios — each "instance" is its own store, and you switch the active one by + /// calling this. Every subsequent LibDB operation hits `path`. Call `resetStoreForTesting` to restore + /// the default. NOT parallel-safe (it mutates process-global state): callers must be `testSequenced` + /// and restore the default when done. + let useStoreForTesting (path : string) : unit = + connString <- + $"Data Source={path};Mode=ReadWriteCreate;Cache=Private;Pooling=true" + connect <- Sql.connect connString |> initializeConnection + + /// TEST-ONLY: restore the default store after `useStoreForTesting`. + let resetStoreForTesting () : unit = + connString <- defaultConnString + connect <- Sql.connect connString |> initializeConnection let query (sql : string) : Sql.SqlProps = connect |> Sql.query sql diff --git a/backend/src/LibExecution/PackageRefs.fs b/backend/src/LibExecution/PackageRefs.fs index 0bf9835211..b047f8ba3e 100644 --- a/backend/src/LibExecution/PackageRefs.fs +++ b/backend/src/LibExecution/PackageRefs.fs @@ -101,6 +101,8 @@ module Type = let result = p [ "Result" ] "Result" let option = p [ "Option" ] "Option" + let sqliteValue = p [ "Sqlite" ] "Value" + let intParseError = p [ "Int" ] "ParseError" let int8ParseError = p [ "Int8" ] "ParseError" let uint8ParseError = p [ "UInt8" ] "ParseError" @@ -140,6 +142,14 @@ module Type = let parseError = p [ "ParseError" ] "ParseError" let json = p [] "Json" + module EventLog = + let private p addl = p ("EventLog" :: addl) + let cursor = p [] "Cursor" + let event = p [] "Event" + let commit = p [] "Commit" + let branchOpEvent = p [] "BranchOpEvent" + let resolutionEvent = p [] "ResolutionEvent" + module Cli = let private p addl = p ("Cli" :: addl) let executionOutcome = p [] "ExecutionOutcome" diff --git a/backend/src/LibExecution/ProgramTypes.fs b/backend/src/LibExecution/ProgramTypes.fs index a912e7cae6..8bf574fbb0 100644 --- a/backend/src/LibExecution/ProgramTypes.fs +++ b/backend/src/LibExecution/ProgramTypes.fs @@ -742,7 +742,6 @@ type PackageOp = - /// The kind of package item (function, type, or value) and ItemKind = | Fn diff --git a/backend/src/LibExecution/RuntimeTypes.fs b/backend/src/LibExecution/RuntimeTypes.fs index 4c8e42c1fe..562fcf3913 100644 --- a/backend/src/LibExecution/RuntimeTypes.fs +++ b/backend/src/LibExecution/RuntimeTypes.fs @@ -1383,7 +1383,8 @@ module Dval = // (probably forces us to make this fn async?) | AppNamedFn _named -> ValueType.Unknown - // CLEANUP follow up when DDB has a typeReference + // CLEANUP follow up when DDB carries a typeReference (the name alone doesn't pin the + // element type, so it stays Unknown — permissive against any declared DB<_>). | DDB _ -> ValueType.Unknown | DBlob _ -> ValueType.Known KTBlob diff --git a/backend/src/LibSerialization/Hashing/Canonical.fs b/backend/src/LibSerialization/Hashing/Canonical.fs index 0aec8d388d..2447d89bc9 100644 --- a/backend/src/LibSerialization/Hashing/Canonical.fs +++ b/backend/src/LibSerialization/Hashing/Canonical.fs @@ -510,7 +510,9 @@ let writeParameter (w : BinaryWriter) (p : PT.PackageFn.Parameter) = - Common.String.write w p.name + // The parameter NAME is not hashed: a body references parameters by position (the parser lowers a + // parameter use to `EArg index`), so the name is cosmetic and a rename leaves the function's meaning + // unchanged. Only the type is part of the content hash. writeTypeReference mode w p.typ let writeRecordField diff --git a/backend/src/LibSerialization/Hashing/Hashing.fs b/backend/src/LibSerialization/Hashing/Hashing.fs index e093fca3bf..b057e504ad 100644 --- a/backend/src/LibSerialization/Hashing/Hashing.fs +++ b/backend/src/LibSerialization/Hashing/Hashing.fs @@ -3,8 +3,10 @@ /// Computes SHA-256 hashes of canonical serialized forms, with SCC-aware /// batch hashing for mutually-recursive definitions (Tarjan's algorithm). /// -/// TODO the name of a fn's argument shouldn't relate to the hash. -/// To to that end, need to adjust PT and such to model `| EArg of pos: Int` or something +/// The hash is **meaning-stable**: bound-variable names don't affect it. A parameter use is positional +/// (`EArg index`) and `Canonical.writeParameter` doesn't hash the parameter name; let/lambda/match binders +/// are alpha-normalized before hashing (below). So two functions identical up to a rename +/// share one content hash. namespace LibSerialization.Hashing open System.IO @@ -39,6 +41,240 @@ module Hashing = let bytes = ms.ToArray() SHA256.HashData(bytes) |> fromSHA256Bytes + // ── alpha-normalization: this IS how a fn/value hashes ────────────────────────────────────────────── + // Bound-variable names (let/lambda/match binders) are incidental — two items identical up to a rename are + // the same item and must hash the same. So computeFnHash/computeValueHash rename every binder to a + // canonical `$0`,`$1`,… (in a fixed structural traversal) before serializing. Parameters are already + // positional (`EArg index`) and not hashed by name (see Canonical.writeParameter), so only these binders + // need handling. Free variables, ids, types, and qualified refs are left untouched. + + // ── the variables a pattern BINDS, left-to-right (deduped within an or-pattern, whose alternatives + // bind the same names) ── + + let rec private letPatternVars (p : PT.LetPattern) : List = + match p with + | PT.LPVariable(_, name) -> [ name ] + | PT.LPUnit _ -> [] + | PT.LPWildcard _ -> [] + | PT.LPTuple(_, first, second, rest) -> + letPatternVars first @ letPatternVars second @ List.collect letPatternVars rest + + let rec private matchPatternVars (p : PT.MatchPattern) : List = + match p with + | PT.MPVariable(_, name) -> [ name ] + | PT.MPEnum(_, _, fields) -> List.collect matchPatternVars fields + | PT.MPTuple(_, first, second, rest) -> + matchPatternVars first + @ matchPatternVars second + @ List.collect matchPatternVars rest + | PT.MPList(_, pats) -> List.collect matchPatternVars pats + | PT.MPListCons(_, head, tail) -> matchPatternVars head @ matchPatternVars tail + // an or-pattern's alternatives bind the SAME variables — collect them once (first occurrence order) + | PT.MPOr(_, pats) -> + pats |> NEList.toList |> List.collect matchPatternVars |> List.distinct + | _ -> [] // literal patterns bind nothing + + + // ── rewrite a pattern's bound-variable names per a name→canonical map ── + + let rec private renameLetPattern + (m : Map) + (p : PT.LetPattern) + : PT.LetPattern = + match p with + | PT.LPVariable(id, name) -> + PT.LPVariable(id, Map.tryFind name m |> Option.defaultValue name) + | PT.LPUnit _ -> p + | PT.LPWildcard _ -> p + | PT.LPTuple(id, first, second, rest) -> + PT.LPTuple( + id, + renameLetPattern m first, + renameLetPattern m second, + List.map (renameLetPattern m) rest + ) + + let rec private renameMatchPattern + (m : Map) + (p : PT.MatchPattern) + : PT.MatchPattern = + match p with + | PT.MPVariable(id, name) -> + PT.MPVariable(id, Map.tryFind name m |> Option.defaultValue name) + | PT.MPEnum(id, caseName, fields) -> + PT.MPEnum(id, caseName, List.map (renameMatchPattern m) fields) + | PT.MPTuple(id, first, second, rest) -> + PT.MPTuple( + id, + renameMatchPattern m first, + renameMatchPattern m second, + List.map (renameMatchPattern m) rest + ) + | PT.MPList(id, pats) -> PT.MPList(id, List.map (renameMatchPattern m) pats) + | PT.MPListCons(id, head, tail) -> + PT.MPListCons(id, renameMatchPattern m head, renameMatchPattern m tail) + | PT.MPOr(id, pats) -> PT.MPOr(id, NEList.map (renameMatchPattern m) pats) + | _ -> p // literal patterns have no names + + + // ── the core: rewrite an expr so every bound variable is a canonical `$n` name ── + + // The counter is threaded as a `ref` mutated in a FIXED structural traversal order, so two + // alpha-equivalent trees (identical structure, different names) get identical `$n` assignments. + + let private mergeEnv + (env : Map) + (m : Map) + : Map = + // inner bindings shadow outer ones + Map.fold (fun acc k v -> Map.add k v acc) env m + + let private bind (counter : int ref) (vars : List) : Map = + vars + |> List.map (fun v -> + let n = counter.Value + counter.Value <- n + 1 + (v, "$" + string n)) + |> Map.ofList + + let private lookup (env : Map) (name : string) : string = + // a bound variable → its canonical name; a free variable (not locally bound) → unchanged + Map.tryFind name env |> Option.defaultValue name + + let rec private norm + (c : int ref) + (env : Map) + (e : PT.Expr) + : PT.Expr = + let r = norm c env // recurse with the same scope (non-binding children) + match e with + // uses of variables — the whole point + | PT.EVariable(id, name) -> PT.EVariable(id, lookup env name) + + // binders + | PT.ELet(id, pat, rhs, body) -> + let rhs = norm c env rhs // `let` is non-recursive: the rhs is in the OUTER scope + let m = bind c (letPatternVars pat) + PT.ELet(id, renameLetPattern m pat, rhs, norm c (mergeEnv env m) body) + | PT.ELambda(id, pats, body) -> + let m = bind c (pats |> NEList.toList |> List.collect letPatternVars) + PT.ELambda( + id, + NEList.map (renameLetPattern m) pats, + norm c (mergeEnv env m) body + ) + | PT.EMatch(id, scrutinee, cases) -> + let scrutinee = norm c env scrutinee + let cases = + cases + |> List.map (fun case -> + let m = bind c (matchPatternVars case.pat) + let env = mergeEnv env m + let normalized : PT.MatchCase = + { pat = renameMatchPattern m case.pat + whenCondition = Option.map (norm c env) case.whenCondition + rhs = norm c env case.rhs } + normalized) + PT.EMatch(id, scrutinee, cases) + + // structural recursion (no new bindings) — every child that is an Expr is normalized + | PT.EString(id, segments) -> + PT.EString(id, List.map (normStringSegment c env) segments) + | PT.EIf(id, cond, thenExpr, elseExpr) -> + PT.EIf(id, r cond, r thenExpr, Option.map r elseExpr) + | PT.ERecordFieldAccess(id, expr, field) -> + PT.ERecordFieldAccess(id, r expr, field) + | PT.EApply(id, fn, typeArgs, args) -> + PT.EApply(id, r fn, typeArgs, NEList.map r args) + | PT.EList(id, exprs) -> PT.EList(id, List.map r exprs) + | PT.ERecord(id, typeName, typeArgs, fields) -> + PT.ERecord(id, typeName, typeArgs, List.map (fun (n, ex) -> (n, r ex)) fields) + | PT.ERecordUpdate(id, record, updates) -> + PT.ERecordUpdate(id, r record, NEList.map (fun (n, ex) -> (n, r ex)) updates) + | PT.EEnum(id, typeName, typeArgs, caseName, fields) -> + PT.EEnum(id, typeName, typeArgs, caseName, List.map r fields) + | PT.ETuple(id, first, second, rest) -> + PT.ETuple(id, r first, r second, List.map r rest) + | PT.EInfix(id, op, left, right) -> PT.EInfix(id, op, r left, r right) + | PT.EDict(id, pairs) -> PT.EDict(id, List.map (fun (k, ex) -> (k, r ex)) pairs) + | PT.EStatement(id, first, next) -> PT.EStatement(id, r first, r next) + | PT.EPipe(id, expr, pipes) -> + PT.EPipe(id, r expr, List.map (normPipe c env) pipes) + + // leaves / no Expr children / no bound names — unchanged + | PT.EInt _ + | PT.EInt64 _ + | PT.EUInt64 _ + | PT.EInt8 _ + | PT.EUInt8 _ + | PT.EInt16 _ + | PT.EUInt16 _ + | PT.EInt32 _ + | PT.EUInt32 _ + | PT.EInt128 _ + | PT.EUInt128 _ + | PT.EBool _ + | PT.EChar _ + | PT.EFloat _ + | PT.EUnit _ + | PT.EValue _ + | PT.EFnName _ + | PT.ESelf _ + | PT.EArg _ + // A parse-error hole carries only an id — no bindings, no Expr children. It can't reach a hashed + // definition in practice (PT2RT rejects diagnostic-carrying parses), but the match must be total. + | PT.EError _ -> e + + and private normStringSegment + (c : int ref) + (env : Map) + (seg : PT.StringSegment) + : PT.StringSegment = + match seg with + | PT.StringText _ -> seg + | PT.StringInterpolation expr -> PT.StringInterpolation(norm c env expr) + + and private normPipe + (c : int ref) + (env : Map) + (p : PT.PipeExpr) + : PT.PipeExpr = + match p with + // a pipe into a variable is a USE — normalize the name like EVariable + | PT.EPipeVariable(id, name, args) -> + PT.EPipeVariable(id, lookup env name, List.map (norm c env) args) + | PT.EPipeLambda(id, pats, body) -> + let m = bind c (pats |> NEList.toList |> List.collect letPatternVars) + PT.EPipeLambda( + id, + NEList.map (renameLetPattern m) pats, + norm c (mergeEnv env m) body + ) + | PT.EPipeInfix(id, op, expr) -> PT.EPipeInfix(id, op, norm c env expr) + | PT.EPipeFnCall(id, fnName, typeArgs, args) -> + PT.EPipeFnCall(id, fnName, typeArgs, List.map (norm c env) args) + | PT.EPipeEnum(id, typeName, caseName, fields) -> + PT.EPipeEnum(id, typeName, caseName, List.map (norm c env) fields) + + + // ── the entry points computeFnHash/computeValueHash use (public so the normalization is directly testable) ── + + /// Alpha-normalize a standalone expression: its `let`/lambda/match binders become canonical. + let normalizeExpr (e : PT.Expr) : PT.Expr = norm (ref 0) Map.empty e + + /// Alpha-normalize a value: its body's binders become canonical. + let normalizeValue + (v : PT.PackageValue.PackageValue) + : PT.PackageValue.PackageValue = + { v with body = normalizeExpr v.body } + + /// Alpha-normalize a function: normalize the body's binders. Parameters need no handling here — a + /// parameter reference in the body is already positional (`EArg index`), and the parameter name isn't + /// part of the hash (see `Canonical.writeParameter`), so a parameter rename can't affect the result. + let normalizeFn (f : PT.PackageFn.PackageFn) : PT.PackageFn.PackageFn = + { f with body = normalizeExpr f.body } + + // ===================== // Hash computation functions @@ -49,9 +285,11 @@ module Hashing = hashWithWriter (fun w -> Canonical.writeType mode w t) - /// Hash a PackageFn (skip id, description, deprecated, param descriptions) + /// Hash a PackageFn (skip id, description, deprecated, param descriptions). + /// MEANING-STABLE: alpha-normalize first, so bound-variable names (parameters, let/lambda/match + /// binders) don't affect the hash — `fn add x y = x + y` and `fn add a b = a + b` hash identically. let computeFnHash (mode : HashRefMode) (fn : PT.PackageFn.PackageFn) : Hash = - hashWithWriter (fun w -> Canonical.writeFn mode w fn) + hashWithWriter (fun w -> Canonical.writeFn mode w (normalizeFn fn)) /// Hash a PackageValue (skip id, description, deprecated) @@ -59,7 +297,8 @@ module Hashing = (mode : HashRefMode) (v : PT.PackageValue.PackageValue) : Hash = - hashWithWriter (fun w -> Canonical.writeValue mode w v) + // meaning-stable: alpha-normalize the body's binders first (see computeFnHash) + hashWithWriter (fun w -> Canonical.writeValue mode w (normalizeValue v)) /// Hash a PackageOp (reuse existing PackageOp.write — ops have no metadata to skip) @@ -201,10 +440,12 @@ module Hashing = : byte array = use ms = new MemoryStream() use w = new BinaryWriter(ms) + // meaning-stable: alpha-normalize fns/values so the batch (SCC) hash, like the single-item hash, + // ignores bound-variable names. Types have no binders, so they pass through unchanged. match item with | TypeItem(t, _, _, _) -> Canonical.writeType mode w t - | FnItem(fn, _, _, _) -> Canonical.writeFn mode w fn - | ValueItem(v, _, _, _) -> Canonical.writeValue mode w v + | FnItem(fn, _, _, _) -> Canonical.writeFn mode w (normalizeFn fn) + | ValueItem(v, _, _, _) -> Canonical.writeValue mode w (normalizeValue v) ms.ToArray() diff --git a/backend/src/LocalExec/Migrations.fs b/backend/src/LocalExec/Migrations.fs index e5010d6fcb..b757074de7 100644 --- a/backend/src/LocalExec/Migrations.fs +++ b/backend/src/LocalExec/Migrations.fs @@ -27,10 +27,9 @@ /// /// CLEANUP maybe move this to LibDB? /// -/// Pre-cutover DBs (those whose `system_migrations_v0` already lists -/// 13 historical names) get adopted: stamp the current schema hash -/// without dropping data. Drop this adapter once nobody's pulling -/// pre-2026-05-08 main. +/// A legacy DB (one whose `system_migrations_v0` already lists the full +/// set of old migration names) is adopted: stamp the current schema hash +/// without dropping data. module LocalExec.Migrations open System.IO @@ -82,24 +81,35 @@ let private storedHash () : Option = | Error err -> Exception.raiseInternal $"storedHash: {err}" [ "err", err ] -let private dropAllUserTables () : unit = - // Disable FK enforcement for the bulk drop. Without this, SQLite refuses - // to drop parent tables before children when the child table's FK - // column is non-nullable; drop order is sqlite_master row order, - // not topological. PRAGMA foreign_keys is connection-scoped, so the - // next connection (which runs schema.sql) gets the default back. +/// Drop ONLY the regenerable projection tables — never the canonical op log, blobs, branches, +/// commits, or account/user state. This is what lets a schema change keep your work: your authored +/// ops survive; only the cache is rebuilt. The list is `Seed.projectionTables` (single source +/// of truth — the same set the runtime's `rebuildProjections` clears), so it can't drift. +let private dropProjectionTables () : unit = + // FK off for the drop (a child projection may FK a parent we're keeping); connection-scoped, so + // the next connection (which replays schema.sql) gets the default back. Sql.query "PRAGMA foreign_keys = OFF" |> Sql.executeStatementSync - let userTables = - Sql.query - "SELECT name FROM sqlite_master - WHERE type = 'table' - AND name NOT LIKE 'sqlite_%' - AND name <> 'schema_state_v0'" - |> Sql.execute (fun read -> read.string "name") - |> Result.unwrap - for t in userTables do + for t in LibDB.Seed.projectionTables do Sql.query (sprintf "DROP TABLE IF EXISTS \"%s\"" t) |> Sql.executeStatementSync +/// Mark every op unapplied so the next `Seed.growIfNeeded` re-folds the whole log into the freshly +/// recreated projections. Re-folding (with value evaluation) needs the runtime, which the migration +/// phase doesn't have — so we defer the fold to startup, exactly like a fresh seed does. +let private markOpsUnapplied () : unit = + if tableExists "package_ops" then + Sql.query "UPDATE package_ops SET applied = 0" |> Sql.executeStatementSync + +let private opCount () : int = + if tableExists "package_ops" then + match + Sql.query "SELECT COUNT(*) AS c FROM package_ops" + |> Sql.execute (fun read -> read.int "c") + with + | Ok(c :: _) -> c + | _ -> 0 + else + 0 + let private writeHash (hash : string) : unit = Sql.query @@ -111,11 +121,10 @@ let private writeHash (hash : string) : unit = |> Sql.executeStatementSync -/// Pre-cutover DBs were migrated by name through `system_migrations_v0`. -/// If we see one with the full set of old migration names already -/// applied, treat it as fully-migrated under the new flow — write the -/// current schema hash so subsequent runs see "up to date" and don't -/// kill-and-fill. Drop this once nobody's pulling pre-2026-05-08 main. +/// A legacy DB was migrated by name through `system_migrations_v0`. If one +/// already has the full set of old migration names applied, treat it as +/// fully migrated under the schema-hash flow — write the current schema +/// hash so subsequent runs see "up to date" and don't kill-and-fill. let private adoptLegacyDB (currentHash : string) : bool = if not (tableExists "system_migrations_v0") then false @@ -129,7 +138,7 @@ let private adoptLegacyDB (currentHash : string) : bool = | _ -> 0 if count >= 13 then print - $"Adopting pre-cutover DB ({count} migrations on record). \ + $"Adopting legacy DB ({count} migrations on record). \ Stamping schema hash; no data dropped." writeHash currentHash true @@ -144,28 +153,42 @@ let private runSchemaBootstrap () : unit = match storedHash () with | Some have when have = want -> () | Some have -> + // Preserve-and-refold (not kill-and-fill): drop only the regenerable projections; the canonical op + // log + blobs + branch/commit/account state survive. Replaying schema.sql recreates the dropped + // projections in their new shape and is a no-op for the surviving canonical tables + // (CREATE TABLE IF NOT EXISTS). Marking ops unapplied makes the next `growIfNeeded` re-fold them. + // NOTE: a canonical-table SHAPE change can't go through this path (CREATE IF NOT EXISTS won't + // alter an existing table) — it needs a data-preserving incremental (the Release migrator). + let ops = opCount () print - $"schema.sql changed (hash {have[0..7]} → {want[0..7]}); \ - kill-and-fill." - dropAllUserTables () + $"schema.sql changed (hash {have[0..7]} → {want[0..7]}); preserving {ops} op(s), \ + rebuilding projections." + dropProjectionTables () Sql.query sql |> Sql.executeStatementSync + markOpsUnapplied () writeHash want | None -> - if adoptLegacyDB want then - () - else - Sql.query sql |> Sql.executeStatementSync - writeHash want + // Fresh OR legacy DB with no schema-hash: always run schema.sql first (CREATE TABLE IF NOT EXISTS — + // creates any missing tables, e.g. `resolutions`/`sync_conflicts`, and is a no-op for existing ones), THEN + // stamp. Previously the adopt path stamped WITHOUT running schema.sql, so a legacy DB was marked current + // while missing the new sync tables and crashed on the first receive/resolution. + // CLEANUP(legacy-shape): CREATE IF NOT EXISTS can't ADD columns to a pre-existing legacy table (an old + // package_ops without origin_ts / the (id, branch_id) PK), so a genuine pre-cutover DB still needs a manual + // rebuild before it can sync. A loud shape-mismatch check is the follow-up if any such DB is still around. + Sql.query sql |> Sql.executeStatementSync + let _ = adoptLegacyDB want // logs the adoption note for a legacy DB; a fresh DB just falls through + writeHash want // --------------------- // Per-file incremental migrations (atop the schema.sql base) // --------------------- // -// Lifted from the pre-cutover shape — name-dedup'd via -// `system_migrations_v0`. schema.sql guarantees the table exists, so -// no separate init step. File naming convention: -// `YYYYMMDD_HHMMSS_.sql`. +// Each file runs once, name-dedup'd via `system_migrations_v0`. +// schema.sql guarantees the table exists, so no separate init step. +// File naming convention: `YYYYMMDD_HHMMSS_.sql`. +// Currently EMPTY by design (the `incremental/` dir holds only README.md): the schema-hash bootstrap + +// the Release migrator cover today's needs. Kept as the seam for a future data-backfill/transform migration. let private incrementalDir = "incremental" @@ -240,4 +263,10 @@ let private runIncrementalMigrations () : unit = let run () : unit = runSchemaBootstrap () + // The Release migrator: after the schema-hash bootstrap, reconcile the store's Release coordinate + // (the op-format/language/hash version) with this binary's. A fresh store is stamped at the current + // Release; an older store runs the pending migration steps; a NEWER store is refused (older code + // must not open it). The single coordinate is `LibDB.Releases.currentRelease` (when sync returns, its + // wire-format version is this same integer). The step registry lives in `LibDB.Releases`. + LibDB.Releases.applyPending LibDB.Releases.currentRelease runIncrementalMigrations () From 9b0db39b1d3c9bd83e65df16769491faa72f0977 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Sun, 12 Jul 2026 13:11:06 -0400 Subject: [PATCH 002/172] Sync: native builtins for the op-log, blob, and conflict surface The F# builtins that expose the store + sync primitives to the Dark side. Kept thin and content-addressed; each carries a real capability so untrusted `dark run` code can't reach the raw file/SQL or op-log surface. - Op-log builtins: append/read the package, branch, and resolution logs; the blob channel (content-addressed bytes, fetch-on-miss) with `syncBlobInsert` re-hashing peer bytes so a poisoned/mismatched blob is rejected. - The arbitrary-path `sqlite*` builtins are gated by a `fileReadWrite` capability (the interpreter no longer skips their capability check). - Package-manager getters by hash (values / fns / types) and the conflict list/keep/acknowledge builtins that back `dark conflicts`. (backend/src/Builtins) Co-Authored-By: Claude Opus 4.8 --- .../Builtins.Http.Client/Libs/HttpClient.fs | 82 ++ .../src/Builtins/Builtins.Matter/Builtin.fs | 6 + .../Builtins.Matter/Builtins.Matter.fsproj | 2 + .../Builtins.Matter/Libs/Conflicts.fs | 143 ++++ .../Builtins.Matter/Libs/PM/Packages.fs | 52 ++ .../Builtins/Builtins.Matter/Libs/Sqlite.fs | 757 ++++++++++++++++++ .../src/Builtins/Builtins.Pure/Libs/List.fs | 14 +- 7 files changed, 1052 insertions(+), 4 deletions(-) create mode 100644 backend/src/Builtins/Builtins.Matter/Libs/Conflicts.fs create mode 100644 backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs diff --git a/backend/src/Builtins/Builtins.Http.Client/Libs/HttpClient.fs b/backend/src/Builtins/Builtins.Http.Client/Libs/HttpClient.fs index d2329019d3..655239d021 100644 --- a/backend/src/Builtins/Builtins.Http.Client/Libs/HttpClient.fs +++ b/backend/src/Builtins/Builtins.Http.Client/Libs/HttpClient.fs @@ -202,8 +202,12 @@ module BaseClient = // Use this to hide more specific errors when looking at loopback Exception.raiseInternal "Could not connect" [] + // Create the socket with the resolved IP's address family (v4 vs v6). The 2-arg ctor defaults + // to IPv6, which only reaches an IPv4 literal (e.g. 127.0.0.1) when the host has IPv6 dual-mode + // — absent in some containers, giving a NetworkError. Matching the family connects either way. let socket = new System.Net.Sockets.Socket( + ips[0].AddressFamily, System.Net.Sockets.SocketType.Stream, System.Net.Sockets.ProtocolType.Tcp ) @@ -339,6 +343,27 @@ module LocalAccess = else true // not ipv4 or ipv6, so banned + /// The subset of banned ranges that stay banned even for a trusted tailnet SYNC pull: 169.254.0.0/16 + /// (link-local + cloud-metadata), GCP private endpoints, and 0.0.0.0. Loopback, RFC-1918, and the + /// Tailscale CGN range (100.64/10) are deliberately ALLOWED here — reaching a tailnet/LAN peer is the + /// whole point — but the cloud-metadata SSRF target is never reachable, even by an unsafe pull. + let private metadataOrLinkLocalV4 (ip : System.Net.IPAddress) : bool = + oneSixNine.Contains ip + || oneNineNineFour.Contains ip + || oneNineNineEight.Contains ip + || zero = ip + + let metadataOrLinkLocal (ip : System.Net.IPAddress) : bool = + if ip.AddressFamily = System.Net.Sockets.AddressFamily.InterNetworkV6 then + if ip.IsIPv4MappedToIPv6 then + metadataOrLinkLocalV4 (ip.MapToIPv4()) + else + ip.IsIPv6LinkLocal // ipv6 link-local / metadata + else if ip.AddressFamily = System.Net.Sockets.AddressFamily.InterNetwork then + metadataOrLinkLocalV4 ip + else + true + let bannedHost (host : string) : bool = let host = host.Trim().ToLower() let badIP = @@ -377,6 +402,17 @@ let defaultConfig : Configuration = allowedHeaders = fun headers -> not (LocalAccess.hasInstanceMetadataHeader headers) } +/// Config for trusted tailnet SYNC pulls (`httpGetUnsafeBytes`). Unlike `defaultConfig` it reaches +/// loopback / RFC-1918 / the Tailscale range so a peer's server is reachable — but unlike `looseConfig` it +/// still blocks cloud-metadata + link-local, so even a sync pull can't be aimed at 169.254.169.254. Also +/// drops the metadata request-header (defence-in-depth; sync sends no headers anyway). +let syncConfig : Configuration = + { looseConfig with + allowedIP = fun ip -> not (LocalAccess.metadataOrLinkLocal ip) + allowedScheme = fun scheme -> scheme = "https" || scheme = "http" + allowedHeaders = + fun headers -> not (LocalAccess.hasInstanceMetadataHeader headers) } + /// Compatibility alias for callers (TestUtils, etc.) that referenced /// `strictConfig` when the default was unsafe. New code should just @@ -778,6 +814,52 @@ let fns (config : Configuration) : List = // runs the same disposer chain when the DStream becomes // unreachable. // —————————————————————————————————————————————————————————— + // GET with SSRF guards OFF, returning raw BYTES — for pulling a peer's op wire over the tailnet. + // (The safe `httpClientRequest` bans loopback/RFC-1918/tailnet, which a peer's sync server sits behind; + // the Blob variant hands the body back as bytes for the caller to decode — `Stdlib.Blob.toString` for the + // JSON wire.) TRUSTED-CLI use: the caller IS the code author; used by `Sync.pull` / `dark sync pull `. + // TODO(sync-ssrf): this is registered in the general builtin set, so it's reachable from any CLI-run Dark + // (incl. packages pulled from a peer). Gate it to the sync surface (its own library or a sync capability). + { name = fn "httpGetUnsafeBytes" 0 + typeParams = [] + parameters = + [ Param.make + "uri" + TString + "URL to GET with SSRF guards OFF (loopback/RFC-1918/tailnet reachable)" ] + returnType = TypeReference.result TBlob TString + description = + "GET with NO SSRF guards, returning the raw response body as Bytes (Ok) or an error message (Error). For pulling a peer's store over the tailnet." + fn = + let syncClient = BaseClient.create syncConfig + + (function + | _, _, _, [ DString uri ] -> + uply { + let request : Request = + { url = uri; method = HttpMethod "GET"; headers = []; body = [||] } + + let! response = makeRequest syncConfig syncClient request + + match response with + | Ok r -> return Dval.resultOk KTBlob KTString (Blob.newEphemeral r.body) + | Error err -> + let reason = + match err with + | RequestError.BadUrl _ -> "bad url" + | RequestError.Timeout -> "timeout" + | RequestError.BadHeader _ -> "bad header" + | RequestError.NetworkError -> "network error" + | RequestError.BadMethod -> "bad method" + return + Dval.resultError KTBlob KTString (DString $"fetch failed: {reason}") + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.Needs.http + deprecated = NotDeprecated } + { name = fn "httpClientStream" 0 typeParams = [] parameters = diff --git a/backend/src/Builtins/Builtins.Matter/Builtin.fs b/backend/src/Builtins/Builtins.Matter/Builtin.fs index 1c1322e5f7..3251ecf415 100644 --- a/backend/src/Builtins/Builtins.Matter/Builtin.fs +++ b/backend/src/Builtins/Builtins.Matter/Builtin.fs @@ -15,6 +15,12 @@ let builtins (pm : PT.PackageManager) : Builtins = [ // DB Libs.DB.builtins () + // Sqlite (raw SQLite access — the Stdlib.Sqlite floor primitive spike) + Libs.Sqlite.builtins () + + // Conflicts (dark conflicts — the sync Conflict/Resolution UX) + Libs.Conflicts.builtins () + // PM (package manager — packages, branches, ops, merge, …) Libs.PM.Packages.builtins pm Libs.PM.PackageOps.builtins pm diff --git a/backend/src/Builtins/Builtins.Matter/Builtins.Matter.fsproj b/backend/src/Builtins/Builtins.Matter/Builtins.Matter.fsproj index 829ecc0971..424df66f0e 100644 --- a/backend/src/Builtins/Builtins.Matter/Builtins.Matter.fsproj +++ b/backend/src/Builtins/Builtins.Matter/Builtins.Matter.fsproj @@ -26,6 +26,8 @@ + + diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Conflicts.fs b/backend/src/Builtins/Builtins.Matter/Libs/Conflicts.fs new file mode 100644 index 0000000000..f8c6355705 --- /dev/null +++ b/backend/src/Builtins/Builtins.Matter/Libs/Conflicts.fs @@ -0,0 +1,143 @@ +/// Builtins for the sync Conflict/Resolution UX (`dark conflicts`). Conflicts are the LOCAL review log of +/// divergences; a human decision (`conflictKeep`) mints a SYNCED `Resolution` that overrides the op-fold and +/// converges on peers. Low-volume (a handful of divergences), so these return plain tuples — no native record +/// construction needed. +module Builtins.Matter.Libs.Conflicts + +open FSharp.Control.Tasks + +open Prelude +open LibExecution.RuntimeTypes +open LibExecution.Builtin.Shortcuts + +module PT = LibExecution.ProgramTypes +module VT = LibExecution.ValueType +module Dval = LibExecution.Dval + +/// The tuple shape a conflict crosses as: (id, location, itemKind, localHash, incomingHash, chosenHash, +/// resolvedBy, status). +let private conflictTupleKT = + KTTuple( + VT.string, + VT.string, + [ VT.string; VT.string; VT.string; VT.string; VT.string; VT.string ] + ) + +let private toTuple (c : LibDB.Conflicts.Conflict) : Dval = + DTuple( + DString c.id, + DString c.location, + [ DString c.itemKind + DString c.localHash + DString c.incomingHash + DString c.chosenHash + DString c.resolvedBy + DString c.status ] + ) + +let fns () : List = + [ { name = fn "conflictsList" 0 + typeParams = [] + parameters = [ Param.make "unit" TUnit "" ] + returnType = + TList( + TTuple( + TString, + TString, + [ TString; TString; TString; TString; TString; TString ] + ) + ) + description = + "This instance's recorded sync conflicts as (id, location, itemKind, localHash, incomingHash, chosenHash, resolvedBy, status). Local-only review log." + fn = + (function + | _, _, _, [ DUnit ] -> + uply { + let! conflicts = LibDB.Conflicts.list () + return conflicts |> List.map toTuple |> Dval.list conflictTupleKT + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + { name = fn "conflictAcknowledge" 0 + typeParams = [] + parameters = + [ Param.make + "location" + TString + "the conflicted location (owner.modules.name)" ] + returnType = TBool + description = + "Acknowledge the auto-resolved conflict at — the auto (last-writer-wins) choice stands. Returns whether one was found." + fn = + (function + | _, _, _, [ DString location ] -> + uply { + let! conflicts = LibDB.Conflicts.list () + + match + conflicts + |> List.tryFind (fun c -> + c.location = location && c.status = "auto-resolved") + with + | Some c -> + do! LibDB.Conflicts.acknowledge c.id + return DBool true + | None -> return DBool false + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + { name = fn "conflictKeep" 0 + typeParams = [] + parameters = + [ Param.make + "location" + TString + "the conflicted location (owner.modules.name)" + Param.make + "chosenHash" + TString + "the candidate content hash to keep (local or incoming)" ] + returnType = TBool + description = + "Override the auto-resolution at : bind it to by minting a SYNCED Resolution (applied locally now; converges on peers). Marks the conflict overridden. Returns whether one was found." + fn = + (function + | _, _, _, [ DString location; DString chosenHash ] -> + uply { + let! conflicts = LibDB.Conflicts.list () + + match + conflicts + |> List.tryFind (fun c -> + c.location = location && c.status = "auto-resolved") + with + | Some c -> + let loc = LibDB.Conflicts.parseLocation location + let itemKind = PT.ItemKind.fromString c.itemKind + let chosenRef = + PT.Reference.fromHashAndKind (PT.Hash chosenHash, itemKind) + // The resolution's `at` competes in the same string-LWW as op origin_ts, so it MUST be minted + // by the one canonical stamp source (lock-guarded, monotonic, InvariantCulture) — not a raw + // UtcNow, which can tie/regress and formats locale-dependently. + let at = LibDB.Inserts.nextOriginTs () + let r = LibDB.Resolutions.mk loc chosenRef "human" c.branchId at + do! LibDB.Resolutions.recordAndApply r + do! LibDB.Conflicts.markOverridden c.id + return DBool true + | None -> return DBool false + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } ] + +let builtins () = LibExecution.Builtin.make [] (fns ()) diff --git a/backend/src/Builtins/Builtins.Matter/Libs/PM/Packages.fs b/backend/src/Builtins/Builtins.Matter/Libs/PM/Packages.fs index 3692ff7875..40d51bc19b 100644 --- a/backend/src/Builtins/Builtins.Matter/Libs/PM/Packages.fs +++ b/backend/src/Builtins/Builtins.Matter/Libs/PM/Packages.fs @@ -24,6 +24,7 @@ open LibExecution.Builtin.Shortcuts module Dval = LibExecution.Dval module D = LibExecution.DvalDecoder module PT = LibExecution.ProgramTypes +module PT2RT = LibExecution.ProgramTypesToRuntimeTypes module PT2DT = LibExecution.ProgramTypesToDarkTypes module RT2DT = LibExecution.RuntimeTypesToDarkTypes module PackageRefs = LibExecution.PackageRefs @@ -314,6 +315,57 @@ let fns (pm : PT.PackageManager) : List = deprecated = NotDeprecated } + // Resolve a package fn's dotted name to a callable value (Applicable), so a name that only exists as a + // STRING (a CLI arg) can be passed as a function without eval'ing a source string. This is what lets + // `dark serve` hand a router to `Stdlib.HttpServer.serve` directly (no `cliEvaluateExpression`). + { name = fn "applicableByName" 0 + typeParams = [] + parameters = + [ Param.make "branchId" TUuid "the branch to resolve on" + Param.make + "name" + TString + "dotted package fn name, e.g. Darklang.Sync.Server.router" ] + returnType = + TypeReference.result + (TFn(NEList.singleton (TVariable "a"), TVariable "b")) + TString + description = + "Resolves a package function by its dotted to a callable value, as a Result — Error (a plain-English message) if there's no such function. Lets a caller (e.g. `dark serve`) report a bad name cleanly instead of crashing." + fn = + (function + | _, _, _, [ DUuid branchId; DString name ] -> + uply { + let okKT = KTFn(NEList.singleton ValueType.Unknown, ValueType.Unknown) + let err (msg : string) = Dval.resultError okKT KTString (DString msg) + // dotted name → owner.modules….fnName (native pattern-match; Prelude's List.last is Option-safe) + match name.Split('.') |> Array.toList |> List.rev with + | fnName :: revOwnerMods -> + match List.rev revOwnerMods with + | owner :: modules -> + let location : PT.PackageLocation = + { owner = owner; modules = modules; name = fnName } + match! pm.findFn (branchId, location) with + | Some fqPkg -> + let rtName = FQFnName.Package(PT2RT.FQFnName.Package.toRT fqPkg) + let namedFn : ApplicableNamedFn = + { name = rtName + typeSymbolTable = Map.empty + typeArgs = [] + argsSoFar = [] } + return + Dval.resultOk okKT KTString (DApplicable(AppNamedFn namedFn)) + | None -> return err $"No function named {name}" + | [] -> return err $"Not a package function name: {name}" + | [] -> return err "Empty router name" + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + { name = fn "pmSearch" 0 typeParams = [] parameters = diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs b/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs new file mode 100644 index 0000000000..714cdd0892 --- /dev/null +++ b/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs @@ -0,0 +1,757 @@ +/// Raw SQLite access from Darklang — the `Stdlib.Sqlite` floor primitive that lets sync/SCM policy live in +/// Dark over an ordinary database, plus the native op-log read/append + blob-channel builtins sync rides on. +/// +/// Surface: `sqliteExec`/`sqliteQuery` (no params) and `sqliteExecP`/`sqliteQueryP` (positional params bound +/// to @p0..@pN — the injection-safe way to pass values). `exec` returns rows affected; `query` returns each +/// row as `Dict` (cells stringified so the row is homogeneous). +/// +/// The `sqlite*` builtins open a caller-supplied file path, so they declare `Needs.fileReadWrite` (the CLI host +/// grants it; untrusted `dark run` under a narrowed grant is denied). They still don't scope to a SPECIFIC +/// path in-body — that (a `sqlite:open:` cap) is a follow-up. Minimal extras also deferred: an opaque +/// connection-registry `Db` handle, a typed `Sqlite.Value` enum, and `transact`. +/// CLEANUP(sqlite-scope): add the in-body path/glob capability check. +module Builtins.Matter.Libs.Sqlite + +open FSharp.Control.Tasks + +open Prelude +open LibExecution.RuntimeTypes +open LibExecution.Builtin.Shortcuts + +open Microsoft.Data.Sqlite + +module Dval = LibExecution.Dval +module PackageRefs = LibExecution.PackageRefs +module NR = LibExecution.RuntimeTypes.NameResolution +module Blob = LibExecution.Blob + +let private connStr (path : string) : string = $"Data Source={path}" + +/// Marshal a SQLite cell (the ADO reader's `obj`) into a typed `Stdlib.Sqlite.Value` DEnum, so +/// ints/reals/blobs keep their types across the round-trip (esp. Bytes for BLOB columns). Mirrors the +/// `Int.fs` ParseError.toDT pattern: build the FQ type name from PackageRefs, then a `DEnum`. +module Value = + let typeName = FQTypeName.fqPackage (PackageRefs.Type.Stdlib.sqliteValue ()) + let knownType : KnownType = KTCustomType(typeName, []) + let typeRef : TypeReference = TCustomType(NR.ok typeName, []) + + let toDT (cell : obj) : Dval = + let (caseName, fields) = + match cell with + | null -> "Null", [] + | :? System.DBNull -> "Null", [] // ADO returns DBNull.Value (not null) for a SQL NULL + | :? int64 as i -> "Int", [ DInt64 i ] + | :? double as f -> "Real", [ DFloat f ] + | :? string as s -> "Text", [ DString s ] + | :? (byte[]) as b -> "Bytes", [ Blob.newEphemeral b ] + | other -> "Text", [ DString(string other) ] + DEnum(typeName, typeName, [], caseName, fields) + +/// Bind a positional param list to @p0..@pN — parameterized statements, so values can't be SQL-injected. +let private bindParams (cmd : SqliteCommand) (parameters : List) : unit = + parameters + |> List.iteri (fun i p -> + cmd.Parameters.AddWithValue($"@p{i}", box p) |> ignore) + +let private paramStrings (dvals : List) : List = + dvals + |> List.map (fun d -> + match d with + | DString s -> s + | other -> string other) + +// exec returns a `Result` (Ok rows-affected / Error message) so a bad path, a locked db, a +// mid-copy failure, etc. surface as a value Dark can handle — never an uncaught throw. This is what lets +// `Sync.pull`/the daemon skip a bad-or-offline peer gracefully. +let private execImpl + (path : string) + (sql : string) + (parameters : List) + : Ply = + uply { + try + use conn = new SqliteConnection(connStr path) + do! conn.OpenAsync() + use cmd = conn.CreateCommand() + cmd.CommandText <- sql + bindParams cmd parameters + let! affected = cmd.ExecuteNonQueryAsync() + return Dval.resultOk KTInt KTString (Dval.int (bigint affected)) + with e -> + return Dval.resultError KTInt KTString (DString e.Message) + } + +// query returns a `Result>, String>` (Ok rows / Error message) to match exec — a bad path +// or malformed SQL surfaces as a value, never an uncaught throw. Lets a caller read a peer's Release / op +// count (or its own config) without a throw taking down the caller. +let private queryImpl + (path : string) + (sql : string) + (parameters : List) + : Ply = + let rowsKT = KTList(ValueType.Known(KTDict(ValueType.Known Value.knownType))) + + uply { + try + use conn = new SqliteConnection(connStr path) + do! conn.OpenAsync() + use cmd = conn.CreateCommand() + cmd.CommandText <- sql + bindParams cmd parameters + let! readerObj = cmd.ExecuteReaderAsync() + use reader = readerObj + let rows = System.Collections.Generic.List() + + let rec loop () : Ply = + uply { + let! hasRow = reader.ReadAsync() + if hasRow then + let cells = + [ for i in 0 .. reader.FieldCount - 1 -> + (reader.GetName i, Value.toDT (reader.GetValue i)) ] + rows.Add(Dval.dict Value.knownType cells) + return! loop () + } + + do! loop () + let listDval = + Dval.list (KTDict(ValueType.Known Value.knownType)) (List.ofSeq rows) + return Dval.resultOk rowsKT KTString listDval + with e -> + return Dval.resultError rowsKT KTString (DString e.Message) + } + +module EventLogRefs = LibExecution.PackageRefs.Type.Stdlib.EventLog +let private eventLogEventType () = FQTypeName.fqPackage (EventLogRefs.event ()) +let private eventLogCommitType () = FQTypeName.fqPackage (EventLogRefs.commit ()) +let private eventLogCursorType () = FQTypeName.fqPackage (EventLogRefs.cursor ()) + +/// Build the `Stdlib.EventLog.Event` record for one op row — natively, so a 1000-op batch never pays the +/// per-row Dark interpreter cost the native read exists to avoid. +let private eventRecord + ((id, op, br, ch, ts) : string * string * string * string * string) + : Dval = + let t = eventLogEventType () + DRecord( + t, + t, + [], + Map + [ "id", DString id + "op", DString op + "branchId", DString br + "commitHash", DString ch + "originTs", DString ts ] + ) + +let private commitRecord + ((hash, msg, br, acct, at) : string * string * string * string * string) + : Dval = + let t = eventLogCommitType () + DRecord( + t, + t, + [], + Map + [ "hash", DString hash + "message", DString msg + "branchId", DString br + "accountId", DString acct + "createdAt", DString at ] + ) + +let private cursorValue (n : int64) : Dval = + let t = eventLogCursorType () + DEnum(t, t, [], "Cursor", [ DInt64 n ]) + +let private branchOpEventType () = + FQTypeName.fqPackage (EventLogRefs.branchOpEvent ()) + +/// Build the `Stdlib.EventLog.BranchOpEvent` record for one branch_ops row — natively (no per-row Dark cost). +let private branchOpEventRecord + ((id, op, originTs) : string * string * string) + : Dval = + let t = branchOpEventType () + DRecord( + t, + t, + [], + Map [ "id", DString id; "op", DString op; "originTs", DString originTs ] + ) + +let private resolutionEventType () = + FQTypeName.fqPackage (EventLogRefs.resolutionEvent ()) + +/// Build the `Stdlib.EventLog.ResolutionEvent` record for one resolutions row. +let private resolutionEventRecord + ((id, branchId, location, itemKind, chosenHash, resolvedBy, at) : + string * string * string * string * string * string * string) + : Dval = + let t = resolutionEventType () + + DRecord( + t, + t, + [], + Map + [ "id", DString id + "branchId", DString branchId + "location", DString location + "itemKind", DString itemKind + "chosenHash", DString chosenHash + "resolvedBy", DString resolvedBy + "at", DString at ] + ) + +/// Read a string field out of an EventLog Event/Commit record (built by the peer + parsed from JSON) — +/// natively, so appending a 1000-op batch never pays the per-row Dark interpreter cost. +let private recField (name : string) (fields : Map) : string = + match Map.tryFind name fields with + | Some(DString s) -> s + | _ -> + Exception.raiseInternal + "eventLog record missing expected string field" + [ "field", name ] + +let fns () : List = + [ { name = fn "sqliteExec" 0 + typeParams = [] + parameters = + [ Param.make "path" TString "the SQLite file to open" + Param.make + "sql" + TString + "a statement to run (CREATE/INSERT/UPDATE/DELETE…)" ] + returnType = TypeReference.result TInt TString + description = + "Opens the SQLite file at and runs . Ok = rows affected; Error = the SQLite message. Never throws." + fn = + (function + | _, _, _, [ DString path; DString sql ] -> execImpl path sql [] + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.Needs.fileReadWrite + deprecated = NotDeprecated } + + { name = fn "sqliteExecP" 0 + typeParams = [] + parameters = + [ Param.make "path" TString "the SQLite file to open" + Param.make "sql" TString "a statement with @p0..@pN placeholders" + Param.make "params" (TList TString) "values bound to @p0..@pN, in order" ] + returnType = TypeReference.result TInt TString + description = + "Like but binds to @p0..@pN placeholders (injection-safe). Ok = rows affected; Error = message." + fn = + (function + | _, _, _, [ DString path; DString sql; DList(_, ps) ] -> + execImpl path sql (paramStrings ps) + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.Needs.fileReadWrite + deprecated = NotDeprecated } + + { name = fn "sqliteQuery" 0 + typeParams = [] + parameters = + [ Param.make "path" TString "the SQLite file to open" + Param.make "sql" TString "a SELECT to run" ] + returnType = TypeReference.result (TList(TDict Value.typeRef)) TString + description = + "Opens the SQLite file at and runs the SELECT . Ok = each row as a dict of " + + "column-name to its typed value; Error = the SQLite message. Never throws." + fn = + (function + | _, _, _, [ DString path; DString sql ] -> queryImpl path sql [] + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.Needs.fileReadWrite + deprecated = NotDeprecated } + + { name = fn "sqliteQueryP" 0 + typeParams = [] + parameters = + [ Param.make "path" TString "the SQLite file to open" + Param.make "sql" TString "a SELECT with @p0..@pN placeholders" + Param.make "params" (TList TString) "values bound to @p0..@pN, in order" ] + returnType = TypeReference.result (TList(TDict Value.typeRef)) TString + description = + "Like but binds to @p0..@pN placeholders (injection-safe). Ok = rows; Error = message." + fn = + (function + | _, _, _, [ DString path; DString sql; DList(_, ps) ] -> + queryImpl path sql (paramStrings ps) + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.Needs.fileReadWrite + deprecated = NotDeprecated } + + // This instance's OWN package store path (data.db). The op-log builtins write ops here; the sync config + // tables (sync_peers/sync_cursors) live here too — the daemon/CLI don't have to know the path. + { name = fn "localDbPath" 0 + typeParams = [] + parameters = [ Param.make "unit" TUnit "" ] + returnType = TString + description = "The file path of this instance's own package store (data.db)." + fn = + (function + | _, _, _, [ DUnit ] -> uply { return DString LibConfig.Config.dbPath } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // The Release (store format/version coordinate: language + op-format + schema + hashing) this Dark + // binary speaks. Compared against the store's stamped Release for the upgrade/`dark version` surface. + { name = fn "currentRelease" 0 + typeParams = [] + parameters = [ Param.make "unit" TUnit "" ] + returnType = TInt + description = "The Release (store format/version) this Dark binary speaks." + fn = + (function + | _, _, _, [ DUnit ] -> + uply { return Dval.int (bigint LibDB.Releases.currentRelease) } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // ── native op-log read/append + blob-channel builtins (the ops-queue seam sync rides on) ── + // CLEANUP(sync-builtins): these operate on the FIXED local store (not an arbitrary path) and still declare + // noCaps, so untrusted `dark run` can read/append the op log. Lower-risk than the arbitrary-path sqlite* above + // (can't touch other files), but when these are reorganized around a first-class ops-queue they should carry + // a real store capability too. + // + // The TYPED, stream-shaped read of the package op log: Event/Commit records + the resume Cursor, all built + // NATIVELY so a 1000-op batch never pays the per-row Dark interpreter cost. `EventLog.readSince` wraps this; + // the events Stream is drained (native loop) for the wire, and is filterable for branch-scoped reads. + { name = fn "packageOpsReadNative" 0 + typeParams = [ "c"; "e"; "cur" ] + parameters = + [ Param.make + "cursor" + TInt64 + "read events after this cursor (0 = from the start)" + Param.make "limit" TInt64 "at most this many events — one bounded batch" ] + returnType = + TTuple(TList(TVariable "c"), TStream(TVariable "e"), [ TVariable "cur" ]) + description = + "This instance's committed events after (at most ) as a Stream of Event records, the Commit records they reference, and the resume Cursor. Built natively — the fast typed read half of the op-log seam." + fn = + (function + | _, _, _, [ DInt64 cursor; DInt64 limit ] -> + uply { + let! (commits, events, newCursor) = LibDB.Seed.eventsSince cursor limit + + let commitsList = + List.map commitRecord commits + |> Dval.list (KTCustomType(eventLogCommitType (), [])) + + let remaining = ref (List.map eventRecord events) + + let nextFn () : Ply> = + uply { + match remaining.Value with + | head :: tail -> + remaining.Value <- tail + return Some head + | [] -> return None + } + + let eventStream = + LibExecution.Stream.newFromIO + (ValueType.Known(KTCustomType(eventLogEventType (), []))) + nextFn + None + + return DTuple(commitsList, eventStream, [ cursorValue newCursor ]) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // The TYPED append: Commit + Event records received from a peer (parsed from JSON natively) folded into the + // package op log. Field extraction is native — a 1000-op pull never pays the per-row Dark cost. Returns the + // count newly applied (idempotent). `EventLog.append` wraps this. + { name = fn "packageOpsAppendNative" 0 + typeParams = [ "c"; "e" ] + parameters = + [ Param.make + "commits" + (TList(TVariable "c")) + "Commit records the events reference" + Param.make + "events" + (TList(TVariable "e")) + "Event records received from a peer" ] + returnType = TInt + description = + "Append received Commit + Event records to the op log (reconciling origin_ts to the MIN stamp for LWW convergence) + fold. Returns the count of ops newly applied. Idempotent. Extracts fields natively." + fn = + (function + | _, _, _, [ DList(_, commits); DList(_, events) ] -> + uply { + // Receive must be TOTAL against a malformed/hostile peer: skip any event/commit that won't parse + // (bad guid/hex), and catch a batch-level DB error (e.g. an FK to a row not in this batch) so the + // pull loop + background daemon survive instead of crashing. CLEANUP(sync-security): peers are + // FULLY TRUSTED for now — a future hardening should verify op ids against content + reject bad ops + // per-op (not skip the whole batch) + not trust the peer's account_id/commit_hash. + let parsedCommits = + commits + |> List.choose (fun c -> + match c with + | DRecord(_, _, _, f) -> + try + Some( + recField "hash" f, + recField "message" f, + System.Guid.Parse(recField "branchId" f), + System.Guid.Parse(recField "accountId" f), + recField "createdAt" f + ) + with _ -> + None + | _ -> None) + + let parsedEvents = + events + |> List.choose (fun ev -> + match ev with + | DRecord(_, _, _, f) -> + try + Some( + System.Guid.Parse(recField "id" f), + System.Convert.FromHexString(recField "op" f), + System.Guid.Parse(recField "branchId" f), + recField "commitHash" f, + recField "originTs" f + ) + with _ -> + None + | _ -> None) + + try + let! applied = LibDB.Seed.receiveOps parsedCommits parsedEvents + return Dval.int (bigint applied) + with _ -> + // -1 = a DB error applying the batch (distinct from 0 = idempotent/nothing new). The puller + // must NOT advance the cursor on this, or the ops are silently skipped (divergence). Parse-skips + // of individual bad ops already happened above (List.choose) — those correctly count as applied. + return Dval.int (bigint -1L) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // The branch-structure log (CreateBranch/CreateCommit/Rebase/Merge/Archive), read as a Stream of + // BranchOpEvent records + the resume Cursor. Branch ops are self-contained (no side commits). Peers apply + // these to LEARN branches — the structure that `packageOps` events reference by branch_id. + { name = fn "branchOpsReadNative" 0 + typeParams = [ "e"; "cur" ] + parameters = + [ Param.make + "cursor" + TInt64 + "read branch ops after this cursor (0 = from the start)" + Param.make "limit" TInt64 "at most this many — one bounded batch" ] + returnType = TTuple(TStream(TVariable "e"), TVariable "cur", []) + description = + "This instance's branch ops after as a Stream of BranchOpEvent records + the resume Cursor. Built natively." + fn = + (function + | _, _, _, [ DInt64 cursor; DInt64 limit ] -> + uply { + let! (events, newCursor) = LibDB.Seed.branchOpsSince cursor limit + + let remaining = ref (List.map branchOpEventRecord events) + + let nextFn () : Ply> = + uply { + match remaining.Value with + | head :: tail -> + remaining.Value <- tail + return Some head + | [] -> return None + } + + let stream = + LibExecution.Stream.newFromIO + (ValueType.Known(KTCustomType(branchOpEventType (), []))) + nextFn + None + + return DTuple(stream, cursorValue newCursor, []) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // Apply branch ops RECEIVED from a peer (BranchOpEvent records) — fold into branches/commits. Idempotent. + { name = fn "branchOpsAppendNative" 0 + typeParams = [ "e" ] + parameters = + [ Param.make + "events" + (TList(TVariable "e")) + "BranchOpEvent records received from a peer" ] + returnType = TInt + description = + "Apply received BranchOpEvent records to the branch-ops log (fold into branches/commits). Returns the count processed. Idempotent." + fn = + (function + | _, _, _, [ DList(_, events) ] -> + uply { + // Total against a bad peer (see packageOpsAppendNative): skip unparseable events, catch batch errors. + let parsed = + events + |> List.choose (fun ev -> + match ev with + | DRecord(_, _, _, f) -> + try + Some( + recField "id" f, + System.Convert.FromHexString(recField "op" f), + recField "originTs" f + ) + with _ -> + None + | _ -> None) + + try + let! applied = LibDB.Seed.receiveBranchOps parsed + return Dval.int (bigint applied) + with _ -> + // -1 = DB error (vs 0 = idempotent) so the puller stops without advancing this log's cursor. + return Dval.int (bigint -1L) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // The resolutions log — synced override overlays. Peers apply these AFTER package ops so a human's + // "keep mine" decision converges everywhere. Read as a Stream of ResolutionEvent records + the cursor. + { name = fn "resolutionsReadNative" 0 + typeParams = [ "e"; "cur" ] + parameters = + [ Param.make + "cursor" + TInt64 + "read resolutions after this cursor (0 = from the start)" + Param.make "limit" TInt64 "at most this many — one bounded batch" ] + returnType = TTuple(TStream(TVariable "e"), TVariable "cur", []) + description = + "This instance's resolutions after as a Stream of ResolutionEvent records + the resume Cursor. Built natively." + fn = + (function + | _, _, _, [ DInt64 cursor; DInt64 limit ] -> + uply { + let! (events, newCursor) = + LibDB.Resolutions.resolutionsSince cursor limit + + let remaining = ref (List.map resolutionEventRecord events) + + let nextFn () : Ply> = + uply { + match remaining.Value with + | head :: tail -> + remaining.Value <- tail + return Some head + | [] -> return None + } + + let stream = + LibExecution.Stream.newFromIO + (ValueType.Known(KTCustomType(resolutionEventType (), []))) + nextFn + None + + return DTuple(stream, cursorValue newCursor, []) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // Apply resolutions RECEIVED from a peer (ResolutionEvent records) — record + overlay onto locations. + // Idempotent (id-keyed) + LWW-gated by each resolution's `at`. + { name = fn "resolutionsAppendNative" 0 + typeParams = [ "e" ] + parameters = + [ Param.make + "events" + (TList(TVariable "e")) + "ResolutionEvent records received from a peer" ] + returnType = TInt + description = + "Apply received ResolutionEvent records (record + overlay onto locations). Returns the count processed. Idempotent." + fn = + (function + | _, _, _, [ DList(_, events) ] -> + uply { + let parsed = + events + |> List.choose (fun ev -> + match ev with + | DRecord(_, _, _, f) -> + try + Some( + recField "id" f, + recField "branchId" f, + recField "location" f, + recField "itemKind" f, + recField "chosenHash" f, + recField "resolvedBy" f, + recField "at" f + ) + with _ -> + None + | _ -> None) + + try + let! applied = LibDB.Resolutions.receiveResolutions parsed + return Dval.int (bigint applied) + with _ -> + // -1 = DB error (vs 0 = idempotent) so the puller stops without advancing this log's cursor. + return Dval.int (bigint -1L) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + + // ── HTTP blob channel — package_blobs (a value's large content) don't ride the op stream, so after + // applying a peer's ops the puller fetches the blobs it now lacks. Content-addressed = idempotent. + + // Sender: the blob MANIFEST — every content hash this instance holds, newline-joined (GET /sync/blobs). + { name = fn "syncBlobManifest" 0 + typeParams = [] + parameters = [ Param.make "unit" TUnit "" ] + returnType = TString + description = + "The blob manifest (the GET /sync/blobs body): every content hash this instance holds, newline-joined." + fn = + (function + | _, _, _, [ DUnit ] -> + uply { + let! hashes = LibDB.RuntimeTypes.Blob.allHashes () + return DString(String.concat "\n" hashes) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // Sender: the bytes for one hash, base64 (GET /sync/blob?hash=), or empty if this instance lacks it. + { name = fn "syncBlobBytes" 0 + typeParams = [] + parameters = [ Param.make "hash" TString "The content hash to fetch" ] + returnType = TString + description = + "The bytes for one content hash, base64-encoded (the GET /sync/blob?hash= body), or empty if this instance lacks it." + fn = + (function + | _, _, _, [ DString hash ] -> + uply { + match! LibDB.RuntimeTypes.Blob.get hash with + | Some bytes -> return DString(System.Convert.ToBase64String bytes) + | None -> return DString "" + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // Receiver: of a peer's offered hashes, which this instance LACKS — exactly the blobs to fetch. + { name = fn "syncBlobMissing" 0 + typeParams = [] + parameters = + [ Param.make + "hashes" + (TList TString) + "A peer's offered content hashes (its manifest)" ] + returnType = TList TString + description = + "Of the peer's offered content hashes, which this instance lacks — a pure content-addressed set-difference (no cursor)." + fn = + (function + | _, _, _, [ DList(_, hashDvals) ] -> + uply { + let hashes = + hashDvals + |> List.choose (fun d -> + match d with + | DString s -> Some s + | _ -> None) + let! missing = LibDB.RuntimeTypes.Blob.missing hashes + return Dval.list KTString (missing |> List.map DString) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // Receiver: store a fetched blob — base64-decode + insert under its content hash. Idempotent (dedup). + { name = fn "syncBlobInsert" 0 + typeParams = [] + parameters = + [ Param.make "hash" TString "The content hash" + Param.make + "base64Bytes" + TString + "The blob's bytes, base64-encoded (empty = skip)" ] + returnType = TBool + description = + "Store a fetched blob: base64-decode + insert under its content hash. Idempotent. Returns true if non-empty bytes were inserted, false if the peer's body was empty." + fn = + (function + | _, _, _, [ DString hash; DString b64 ] -> + uply { + if b64 = "" then + return DBool false + else + // Total against a hostile/garbled peer body (bad base64 must not throw), and — the integrity + // core of a content-addressed store — only store bytes that ACTUALLY hash to the claimed hash. + // Without this a peer could serve arbitrary bytes for a legitimate hash and poison the store + // (a value silently becomes different code) for every branch that references it. + match + (try + Some(System.Convert.FromBase64String b64) + with _ -> + None) + with + | None -> return DBool false + | Some bytes -> + if LibExecution.Blob.sha256Hex bytes = hash then + do! LibDB.RuntimeTypes.Blob.insert hash bytes + return DBool true + else + return DBool false + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } ] + +let builtins () = LibExecution.Builtin.make [] (fns ()) diff --git a/backend/src/Builtins/Builtins.Pure/Libs/List.fs b/backend/src/Builtins/Builtins.Pure/Libs/List.fs index d2775ada5b..6260742b4d 100644 --- a/backend/src/Builtins/Builtins.Pure/Libs/List.fs +++ b/backend/src/Builtins/Builtins.Pure/Libs/List.fs @@ -358,10 +358,16 @@ let fns () : List = preserving the order." fn = (function - | _, vm, _, [ DList(vt1, l1); DList(_vt2, l2) ] -> - // VTTODO should fail here in the case of vt1 conflicting with vt2? - // (or is this handled by the interpreter?) - Ply(TypeChecker.DvalCreator.list vm.threadID vt1 (List.append l1 l2)) + | _, vm, _, [ DList(vt1, l1); DList(vt2, l2) ] -> + // Both inputs are already-validated DLists, so their concatenation is valid iff their element + // types merge (O(1)) — no need to re-typecheck every element. This keeps `push` (= `append + // [x] list`), and therefore `map`/`filter`/`reverse`/every fold-built list op, O(n) instead of + // O(n²): re-validating the whole growing list on each push was quadratic. On a genuine type + // conflict, fall back to `DvalCreator.list` for the precise element-level error. + match VT.merge vt1 vt2 with + | Ok merged -> Ply(DList(merged, List.append l1 l2)) + | Error() -> + Ply(TypeChecker.DvalCreator.list vm.threadID vt1 (List.append l1 l2)) | _ -> incorrectArgs ()) sqlSpec = NotYetImplemented previewable = Pure From 8edb33c21db0ed78949e1a8d61aebd7e8b4e9486 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Sun, 12 Jul 2026 13:11:06 -0400 Subject: [PATCH 003/172] =?UTF-8?q?Sync:=20the=20Dark=20surface=20?= =?UTF-8?q?=E2=80=94=20engine,=20HTTP=20server,=20and=20CLI?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Package sync over HTTP, written in Dark. Local-first: sync is opt-in, and all your branches sync wholesale — a branch is the same id+name on every instance you connect (no per-branch private/follow controls). - Engine (sync.dark): connect/pull/serve, per-peer resume cursors, the bounded ops-over-HTTP wire, and receive that folds branch structure before content. `connect` probes GET /sync/health so a dead/typo'd peer URL is caught up front. A DB error during pull stops without advancing the cursor (no silent divergence). Adaptive daemon poll interval, clamped + validated. - Server (sync/server.dark): the /sync/{health,events,blobs,blob} endpoints a peer pulls from. - CLI: `dark sync` (+ `daemon` for background pull/serve on boot), `dark conflicts` (review + keep-mine/keep-theirs — `show` renders each version's actual contents, not just hashes), `dark ops` (inspect the log), `devices`, and login/serve wording fixes. `conflicts` + `ops` are in the compact command list so they're discoverable. - Stdlib: the generic eventLog append/fold + sqlite helpers the engine uses. (packages/darklang) Co-Authored-By: Claude Opus 4.8 --- packages/darklang/cli/apps/registry.dark | 10 + packages/darklang/cli/apps/servers.dark | 6 + packages/darklang/cli/auth/login.dark | 4 +- packages/darklang/cli/conflicts.dark | 198 ++++++++ packages/darklang/cli/core.dark | 9 +- packages/darklang/cli/http/serve.dark | 53 +-- .../darklang/cli/installation/version.dark | 26 ++ packages/darklang/cli/ops.dark | 94 ++++ packages/darklang/cli/sync.dark | 430 ++++++++++++++++++ packages/darklang/stdlib/eventLog.dark | 139 ++++++ packages/darklang/stdlib/sqlite.dark | 114 +++++ packages/darklang/sync.dark | 361 +++++++++++++++ packages/darklang/sync/server.dark | 92 ++++ 13 files changed, 1505 insertions(+), 31 deletions(-) create mode 100644 packages/darklang/cli/conflicts.dark create mode 100644 packages/darklang/cli/ops.dark create mode 100644 packages/darklang/cli/sync.dark create mode 100644 packages/darklang/stdlib/eventLog.dark create mode 100644 packages/darklang/stdlib/sqlite.dark create mode 100644 packages/darklang/sync.dark create mode 100644 packages/darklang/sync/server.dark diff --git a/packages/darklang/cli/apps/registry.dark b/packages/darklang/cli/apps/registry.dark index 5eca2249a8..b0a73ea588 100644 --- a/packages/darklang/cli/apps/registry.dark +++ b/packages/darklang/cli/apps/registry.dark @@ -15,6 +15,16 @@ let available () : List = slug = "heartbeat" description = "Demo daemon: logs a heartbeat every interval until stopped" target = Model.Target.Daemon "Darklang.Cli.Apps.Examples.heartbeat" } + Model.App + { name = "Sync" + slug = "sync" + description = "Keep your packages in sync with your other instances (background autosync)" + target = Model.Target.Daemon "Darklang.Sync.daemon" } + Model.App + { name = "Sync Server" + slug = "sync-server" + description = "Serve your ops so peers can pull from you (the serving side of sync)" + target = Model.Target.Daemon "Darklang.Cli.Apps.Servers.syncServer" } Model.App { name = "Outliner" slug = "outliner" diff --git a/packages/darklang/cli/apps/servers.dark b/packages/darklang/cli/apps/servers.dark index 3367fcc6fb..c304307434 100644 --- a/packages/darklang/cli/apps/servers.dark +++ b/packages/darklang/cli/apps/servers.dark @@ -26,3 +26,9 @@ let darkPackages (name: String) : Unit = // `demo-http` — a tiny demo server (/, /hello, /echo). Defaults to 9091 (a devcontainer-forwarded port). let demoHttp (name: String) : Unit = httpDaemon name 9091 "HttpServerTest.router" Darklang.DemoData.HttpServerTest.router + +// `sync-server` — serve your ops over HTTP so peers can pull from you (the serving side of `dark sync`, the +// boot-persistent twin of `dark sync serve`). Defaults to 9000 (matches `dark sync serve`); override via +// config `apps.sync-server.port`. +let syncServer (name: String) : Unit = + httpDaemon name 9000 "Sync.Server.router" Darklang.Sync.Server.router diff --git a/packages/darklang/cli/auth/login.dark b/packages/darklang/cli/auth/login.dark index d763f9c434..21f8b203f1 100644 --- a/packages/darklang/cli/auth/login.dark +++ b/packages/darklang/cli/auth/login.dark @@ -56,8 +56,8 @@ let help (state: AppState) : AppState = " login List available accounts" " login Log in as that account" "" - "Logging in unblocks `commit`, `serve`, and other ops/commit-time" - "actions. Use `logout` to clear the active account." ] + "Logging in unblocks `commit` and other authoring actions — it records" + "who authors each change (serving needs no login). `logout` clears it." ] |> Stdlib.printLines state diff --git a/packages/darklang/cli/conflicts.dark b/packages/darklang/cli/conflicts.dark new file mode 100644 index 0000000000..d21962f773 --- /dev/null +++ b/packages/darklang/cli/conflicts.dark @@ -0,0 +1,198 @@ +module Darklang.Cli.Conflicts + +// `dark conflicts` — review + adjudicate sync divergences. When two instances edit the same name, sync +// auto-resolves by last-writer-wins but records the divergence here (never silent). You can acknowledge the +// auto choice, or override it — an override mints a SYNCED Resolution that propagates so peers converge on +// your pick. + +type Conflict = + { id: String + location: String + itemKind: String + localHash: String + incomingHash: String + chosenHash: String + resolvedBy: String + status: String } + +let private conflicts () : List = + Stdlib.List.map (Builtin.conflictsList ()) (fun t -> + let (id, location, itemKind, localHash, incomingHash, chosenHash, resolvedBy, status) = + t + + Conflict + { id = id + location = location + itemKind = itemKind + localHash = localHash + incomingHash = incomingHash + chosenHash = chosenHash + resolvedBy = resolvedBy + status = status }) + +// First 8 chars of a hash for compact display. +let private short (h: String) : String = + Stdlib.String.slice h 0 8 + +let private unreviewed () : List = + Stdlib.List.filter (conflicts ()) (fun c -> c.status == "auto-resolved") + +let private findOpen (location: String) : Stdlib.Option.Option = + Stdlib.List.findFirst (unreviewed ()) (fun c -> c.location == location) + +let private noneMsg (location: String) : String = + $"No open conflict at {location}. See: dark conflicts" + +// Override at with — mints a synced Resolution + marks the conflict overridden. +let private keep (location: String) (hash: String) : Bool = + Builtin.conflictKeep location hash + +// Pretty-print one candidate's actual content (its source), indented, so `show` lets you compare the two +// versions by WHAT THEY ARE — not just opaque hashes. pmGet* return the always-present PT definition (pt_def, +// never NULL), so both sides always render even when one isn't the active pick; falls back to the short hash +// if a version somehow can't be loaded. +let private renderContent + (branchId: Uuid) + (itemKind: String) + (hashStr: String) + : String = + let hash = LanguageTools.ProgramTypes.Hash.Hash hashStr + let ctx = + PrettyPrinter.ProgramTypes.Context + { branchId = branchId + currentModule = Stdlib.Option.Option.None + currentFunction = Stdlib.Option.Option.None } + let rendered = + match itemKind with + | "value" -> + match Builtin.pmGetValue hash with + | Some e -> + Stdlib.Option.Option.Some(PrettyPrinter.ProgramTypes.packageValue ctx e) + | None -> Stdlib.Option.Option.None + | "fn" -> + match Builtin.pmGetFn hash with + | Some e -> Stdlib.Option.Option.Some(PrettyPrinter.ProgramTypes.packageFn ctx e) + | None -> Stdlib.Option.Option.None + | "type" -> + match Builtin.pmGetType hash with + | Some e -> + Stdlib.Option.Option.Some(PrettyPrinter.ProgramTypes.packageType ctx e) + | None -> Stdlib.Option.Option.None + | _ -> Stdlib.Option.Option.None + match rendered with + | Some src -> + let indentedLines = + Stdlib.List.map (Stdlib.String.split src "\n") (fun line -> $" {line}") + Stdlib.String.join indentedLines "\n" + | None -> $" <{short hashStr}> (content unavailable)" + +let help (state: AppState) : AppState = + Stdlib.printLine "dark conflicts — review + resolve sync divergences" + Stdlib.printLine "" + Stdlib.printLine " dark conflicts [list] unreviewed conflicts" + Stdlib.printLine " dark conflicts show the two candidate contents" + Stdlib.printLine " dark conflicts ok acknowledge (the auto choice stands)" + Stdlib.printLine " dark conflicts keep-mine override → keep your version (syncs)" + Stdlib.printLine " dark conflicts keep-theirs override → keep their version (syncs)" + state + +let execute (state: AppState) (args: List) : AppState = + match args with + | [] + | [ "list" ] -> + match unreviewed () with + | [] -> + Stdlib.printLine (Colors.success "No conflicts — everything's converged.") + state + | cs -> + let n = Stdlib.List.length cs + let noun = if n == 1 then "conflict" else "conflicts" + Stdlib.printLine $"{Stdlib.Int.toString n} unreviewed {noun}:" + + Stdlib.List.iter cs (fun c -> + let kept = + if c.chosenHash == c.incomingHash then "theirs" else "yours" + + Stdlib.printLine + $" {c.location} active: {short c.chosenHash} ({kept}, {c.resolvedBy}) yours: {short c.localHash} · theirs: {short c.incomingHash}") + + Stdlib.printLine ( + Colors.hint + " dark conflicts show · keep-mine · keep-theirs · ok ") + + state + + | [ "show"; location ] -> + match findOpen location with + | Some c -> + let branchId = state.currentBranchId + let yoursActive = + if c.chosenHash == c.localHash then " (active — auto:last-writer-wins)" else "" + let theirsActive = + if c.chosenHash == c.incomingHash then " (active — auto:last-writer-wins)" else "" + + Stdlib.printLine $"{c.location} — two versions ({c.itemKind}):" + Stdlib.printLine "" + Stdlib.printLine $" yours {short c.localHash}{yoursActive}" + Stdlib.printLine (renderContent branchId c.itemKind c.localHash) + Stdlib.printLine "" + Stdlib.printLine $" theirs {short c.incomingHash}{theirsActive}" + Stdlib.printLine (renderContent branchId c.itemKind c.incomingHash) + Stdlib.printLine "" + + Stdlib.printLine ( + Colors.hint + $" keep yours: dark conflicts keep-mine {location} · keep theirs: dark conflicts keep-theirs {location}") + + state + | None -> + Stdlib.printLine (Colors.error (noneMsg location)) + state + + | [ "ok"; location ] -> + if Builtin.conflictAcknowledge location then + Stdlib.printLine (Colors.success $"Acknowledged {location} — the auto choice stands.") + else + Stdlib.printLine (Colors.error (noneMsg location)) + + state + + | [ "keep-mine"; location ] -> + match findOpen location with + | Some c -> + let _ = keep location c.localHash + + Stdlib.printLine ( + Colors.success + $"Kept yours ({short c.localHash}) at {location}. This resolution will sync to your peers.") + + state + | None -> + Stdlib.printLine (Colors.error (noneMsg location)) + state + + | [ "keep-theirs"; location ] -> + match findOpen location with + | Some c -> + let _ = keep location c.incomingHash + + Stdlib.printLine ( + Colors.success + $"Kept theirs ({short c.incomingHash}) at {location}. This resolution will sync to your peers.") + + state + | None -> + Stdlib.printLine (Colors.error (noneMsg location)) + state + + | _ -> help state + +let complete + (state: AppState) + (args: List) + : List = + match args with + | [] -> + [ "list"; "show"; "ok"; "keep-mine"; "keep-theirs" ] + |> Stdlib.List.map Completion.simple + | _ -> [] diff --git a/packages/darklang/cli/core.dark b/packages/darklang/cli/core.dark index 2cdb1f9600..8809b61475 100644 --- a/packages/darklang/cli/core.dark +++ b/packages/darklang/cli/core.dark @@ -273,11 +273,14 @@ module Registry = ("export-seed", "Export minimal seed.db from current database", [], ExportSeed.execute, ExportSeed.help, ExportSeed.complete) ("traces", "List and view execution traces", [ "trace" ], Tracing.execute, Tracing.help, Tracing.complete) ("review", "Review branch changesets", [], SCM.Review.App.execute, SCM.Review.App.help, SCM.Review.App.complete) + ("conflicts", "Review + resolve sync divergences", [], Conflicts.execute, Conflicts.help, Conflicts.complete) ("views", "Browse and preview CLI views", [], Apps.Views.App.execute, Apps.Views.App.help, Apps.Views.App.complete) - ("login", "Log in as a seeded account (required for commit / serve)", [], Auth.Login.execute, Auth.Login.help, Auth.Login.complete) + ("login", "Log in as a seeded account (required for commit)", [], Auth.Login.execute, Auth.Login.help, Auth.Login.complete) ("logout", "Clear the active account", [], Auth.Logout.execute, Auth.Logout.help, Auth.Logout.complete) ("caps", "View + control this instance's capability grant (default NONE)", [ "capabilities" ], Caps.Command.execute, Caps.Command.help, Caps.Command.complete) ("devices", "Your tailnet devices (status / serve / ping), over the `tailscale` CLI", [], Devices.execute, Devices.help, Devices.complete) + ("sync", "Share package changes with your other instances (local-first)", [], Sync.execute, Sync.help, Sync.complete) + ("ops", "Inspect this instance's op log, read live from SQLite", [], Ops.execute, Ops.help, Ops.complete) ("apps", "List, install, and manage apps (daemons, foreground, UI)", [], Apps.Command.execute, Apps.Command.help, Apps.Command.complete) ("text-editor", "Demo: a tiny text editor (the outliner's widget surfaced as an app)", [], Apps.Examples.TextEdit.execute, Apps.Examples.TextEdit.help, Apps.Examples.TextEdit.complete) ] |> Stdlib.List.map( @@ -353,12 +356,12 @@ module Registry = // Command groups organized by category (shared between compact and detailed views) let commandGroups () : List<(String * List)> = [ ("Packages", [ "nav"; "ls"; "view"; "tree"; "back"; "search"; "deps"; "val"; "let"; "fn"; "type"; "hash"; "db"; "deprecate"; "delete" ]) - ("SCM", [ "status"; "log"; "commit"; "discard"; "show"; "branch"; "rebase"; "merge"; "review" ]) + ("SCM", [ "status"; "log"; "commit"; "discard"; "show"; "ops"; "branch"; "rebase"; "merge"; "review" ]) ("Execution", [ "run"; "eval"; "scripts" ]) ("Installation", [ "install"; "update"; "uninstall"; "version" ]) ("AI", [ "agent" ]) ("Security", [ "caps" ]) - ("Network", [ "devices" ]) + ("Network", [ "devices"; "sync"; "conflicts" ]) ("Apps", [ "apps" ]) ("Utilities", [ "clear"; "help"; "docs"; "quit"; "builtins"; "export-seed"; "views" ]) ] diff --git a/packages/darklang/cli/http/serve.dark b/packages/darklang/cli/http/serve.dark index 8ea63e7b69..7d5fa8f688 100644 --- a/packages/darklang/cli/http/serve.dark +++ b/packages/darklang/cli/http/serve.dark @@ -88,34 +88,35 @@ let execute (state: Cli.AppState) (args: List) : Cli.AppState = let portStr = Stdlib.Int.toString parsed.port let maxBytesStr = Stdlib.Int.toString parsed.maxBodyBytes - [ $"Using router: {parsed.routerPath}" - $"Max body bytes: {maxBytesStr}" - "" - Colors.success $"Listening on http://localhost:{portStr}" - "Press Ctrl+C to stop" - "" ] - |> Stdlib.printLines - - // serve via the stdlib helper; only a non-default max body needs a record-update on the config. - let configExpr = + let baseConfig = Stdlib.HttpServer.Config.defaults parsed.port + + let config = if parsed.maxBodyBytes == Stdlib.HttpServer.Config.defaultMaxBodyBytes then - $"Stdlib.HttpServer.Config.defaults {portStr}I" + baseConfig else - $"{{ Stdlib.HttpServer.Config.defaults {portStr}I with maxBodyBytes = {maxBytesStr}I }}" - - let expr = $"Stdlib.HttpServer.serve ({configExpr}) {parsed.routerPath}" - - match - Builtin.cliEvaluateExpression - state.accountID - state.currentBranchId - expr - false - with - | Ok _ -> state - | Error err -> - let pretty = Cli.ExecutionError.toString state.currentBranchId err - Stdlib.printLine (Colors.error $"Server failed: {pretty}") + { baseConfig with maxBodyBytes = parsed.maxBodyBytes } + + // Resolve the router to a callable value and call serve DIRECTLY — no string-eval. The CLI expression + // parser mis-tokenizes an int literal in argument position (`defaults 8080` → "no variable named: I"), + // which breaks the string-eval form of serve; applicableByName sidesteps it. + // TODO(serve-parser): fix the underlying parser (NI-literal in argument position) — pre-existing platform bug. + // Resolve BEFORE announcing "Listening" so a bad router name reports cleanly, never a false start. + match Builtin.applicableByName state.currentBranchId parsed.routerPath with + | Ok router -> + [ $"Using router: {parsed.routerPath}" + $"Max body bytes: {maxBytesStr}" + "" + Colors.success $"Listening on http://localhost:{portStr}" + "Press Ctrl+C to stop" + "" ] + |> Stdlib.printLines + + Stdlib.HttpServer.serve config router + state + | Error msg -> + Stdlib.printLine ( + Colors.error $"{msg} — is it defined and committed on this branch?") + state diff --git a/packages/darklang/cli/installation/version.dark b/packages/darklang/cli/installation/version.dark index 5b07965388..293b659a91 100644 --- a/packages/darklang/cli/installation/version.dark +++ b/packages/darklang/cli/installation/version.dark @@ -4,6 +4,32 @@ module Darklang.Cli.Installation.Version let execute (state: AppState) (args: List) : AppState = let versionInfo = Helpers.getVersionInfo () Stdlib.printLine versionInfo + + // Release coordinate — the store format/version this Dark speaks vs what your local data is stamped at. + // (This is what the boot-time migrator + sync's wire-version key off; see `dark update`.) + let exeRel = Stdlib.Int.toString (Builtin.currentRelease ()) + + let storeRel = + match + Stdlib.Sqlite.query + (Builtin.localDbPath ()) + "SELECT release FROM release_state_v0 WHERE id = 0" + with + | Ok [ row ] -> + match Stdlib.Dict.get row "release" with + | Some c -> + match Stdlib.Sqlite.asInt c with + | Some i -> Stdlib.Int64.toString i + | None -> "?" + | None -> "?" + | _ -> "?" + + if exeRel == storeRel then + Stdlib.printLine $"Release {exeRel} · your data is up to date" + else + Stdlib.printLine + $"Dark Release {exeRel} · your data is Release {storeRel} (run `dark update`)" + state diff --git a/packages/darklang/cli/ops.dark b/packages/darklang/cli/ops.dark new file mode 100644 index 0000000000..67b8c1939a --- /dev/null +++ b/packages/darklang/cli/ops.dark @@ -0,0 +1,94 @@ +module Darklang.Cli.Ops + +// Inspect this instance's op log directly. The ops ARE your packages — every add / rename / deprecate of a +// fn·type·value is a row in the `package_ops` SQLite table. This reads them through the generic `Stdlib.Sqlite` +// interface (the same one a peer's wire read uses, and the same one an eventual Dark-managed fold would use), +// so it doubles as a live proof that Dark can read the log at speed. Read-only. + +let private db () : String = Builtin.localDbPath () + +/// First 8 chars of a hash/uuid for compact display. +let private short (s: String) : String = + if Stdlib.String.length s <= 8 then s else Stdlib.String.slice s 0 8 + +/// A text cell from a Sqlite row for display, or "" if missing/non-text. +let private textCell (row: Dict) (col: String) : String = + (Stdlib.Sqlite.textField row col) |> Stdlib.Option.withDefault "" + +/// Total ops in the log. +let private countOps () : Int64 = + (Stdlib.Sqlite.scalarInt (db ()) "SELECT count(*) AS n FROM package_ops" "n") + |> Stdlib.Option.withDefault 0L + +/// The most recent ops, newest first — with the read time, so the log's read speed is visible. +let executeList (state: AppState) (limit: Int64) : AppState = + let start = Stdlib.DateTime.now () + let total = countOps () + + let sql = + "SELECT o.id AS id, o.branch_id AS br, o.commit_hash AS ch, o.origin_ts AS ts, " + ++ "CAST(length(o.op_blob) AS TEXT) AS sz, COALESCE(c.message, '') AS msg " + ++ "FROM package_ops o LEFT JOIN commits c ON o.commit_hash = c.hash " + ++ $"ORDER BY o.created_at DESC LIMIT {Stdlib.Int64.toString limit}" + + match Stdlib.Sqlite.query (db ()) sql with + | Ok rows -> + let elapsedMs = Stdlib.DateTime.subtractMs (Stdlib.DateTime.now ()) start + + Stdlib.printLine ( + Colors.success + $"{Stdlib.Int64.toString total} ops in this instance's log — counted + read from SQLite via Stdlib.Sqlite in {Stdlib.Int.toString elapsedMs}ms") + + Stdlib.printLine (Colors.hint " id branch commit/WIP size message / origin_ts") + + Stdlib.List.iter rows (fun row -> + let commit = textCell row "ch" + let commitStr = if commit == "" then "WIP" else short commit + let msg = textCell row "msg" + let tail = if msg == "" then textCell row "ts" else msg + + Stdlib.printLine + $" {short (textCell row "id")} {short (textCell row "br")} {commitStr} {textCell row "sz"}B {tail}") + + state + | Error e -> + Stdlib.printLine (Colors.error $"Couldn't read the op log: {e}") + state + +let help (state: AppState) : AppState = + Stdlib.List.iter + [ "dark ops — inspect this instance's op log (the rows that ARE your packages), read live from SQLite." + "" + " dark ops the most recent 20 ops + the total (with read time)" + " dark ops the most recent n ops" + " dark ops list same" + "" + "The log is the `package_ops` table; this reads it through Stdlib.Sqlite — the same generic interface a" + "peer's wire read uses (and a future Dark-managed fold would). Read-only." ] + (fun line -> Stdlib.printLine line) + + state + +let execute (state: AppState) (args: List) : AppState = + match args with + | [] -> executeList state 20L + | [ "list" ] -> executeList state 20L + | [ "list"; n ] -> + match Stdlib.Int64.parse n with + | Ok l -> executeList state l + | Error _ -> executeList state 20L + | [ n ] -> + match Stdlib.Int64.parse n with + | Ok l -> executeList state l + | Error _ -> + help state + state + | _ -> + help state + state + +let complete + (state: AppState) + (args: List) + : List = + [] diff --git a/packages/darklang/cli/sync.dark b/packages/darklang/cli/sync.dark new file mode 100644 index 0000000000..7b3c1a7686 --- /dev/null +++ b/packages/darklang/cli/sync.dark @@ -0,0 +1,430 @@ +module Darklang.Cli.Sync + +// `dark sync` — keep your packages in step with your other instances, over HTTP. Local-first: sync is opt-in, +// and once you connect a peer, `dark sync daemon start` keeps things current in the background. +// Peers are URLs (running instances), never files — sync exchanges ops, not databases. + +// "1 instance" / "2 instances" — count + correctly-pluralized noun, so no message reads "1 instance(s)". +let private plural (n: Int) (noun: String) : String = + if n == 1 then + $"{Stdlib.Int.toString n} {noun}" + else + $"{Stdlib.Int.toString n} {noun}s" + +// Serve the sync endpoint so peers can pull from you. Blocks until Ctrl+C (foreground); for boot, use +// `dark sync daemon start`. Same router `dark serve Darklang.Sync.Server.router` would run — just less +// to type, and it prints the address peers actually need. +let private serveOn (port: Int) (state: AppState) : AppState = + let portStr = Stdlib.Int.toString port + + [ Colors.success $"Serving sync on http://localhost:{portStr} — peers can pull from you here." + Colors.hint $" Remote peers use your tailnet address, e.g. http://you.tailnet:{portStr}" + Colors.hint " Keep it running (serve on boot): dark sync daemon start" + " Press Ctrl+C to stop." ] + |> Stdlib.printLines + + Stdlib.HttpServer.serve + (Stdlib.HttpServer.Config.defaults port) + Darklang.Sync.Server.router + + state + +// ── `dark sync daemon` — automatic sync: ONE toggle over both the pull daemon (`sync`) and the serve +// daemon (`sync-server`). Settings live in cli-config (mode / interval / port / on-boot), adjustable via +// `dark sync daemon config`. Replaces `dark apps enable sync` as the blessed surface. + +let private daemonMode () : String = + match Darklang.Cli.Config.get "sync.daemon.mode" with + | Some m -> m + | None -> "pull+serve" + +let private daemonSlugs (mode: String) : List = + match mode with + | "pull-only" -> [ "sync" ] + | "serve-only" -> [ "sync-server" ] + | _ -> [ "sync"; "sync-server" ] + +let private intervalSec () : Int = + (Darklang.Cli.Config.getInt "apps.sync.intervalMs" 30000) / 1000 + +let private servePort () : Int = + Darklang.Cli.Config.getInt "apps.sync-server.port" 9000 + +let private onBoot () : Bool = + match Darklang.Cli.Config.get "sync.daemon.onBoot" with + | Some "no" -> false + | _ -> true + +let private settingsLine () : String = + let boot = if onBoot () then "on boot" else "not on boot" + + $"mode: {daemonMode ()} · every {Stdlib.Int.toString (intervalSec ())}s · port {Stdlib.Int.toString (servePort ())} · {boot}" + +let private setConfig (key: String) (value: String) : Unit = + let updated = + Stdlib.Dict.setOverridingDuplicates (Darklang.Cli.Config.readConfig ()) key value + + let _ = Darklang.Cli.Config.writeConfig updated + () + +// The first-run dialog: explain the defaults, offer to adjust them inline. In a non-interactive context +// (piped/no TTY) the "Adjust?" prompt reads EOF → No, so it falls through to defaults without blocking. +let private firstRunDialog () : Unit = + Stdlib.printLine "Setting up automatic sync. Defaults:" + + Stdlib.printLine ( + Colors.hint + $" · pull from peers + serve to them, every {Stdlib.Int.toString (intervalSec ())}s") + + Stdlib.printLine ( + Colors.hint + $" · serve on port {Stdlib.Int.toString (servePort ())} — all branches, open to anyone who can reach you") + + Stdlib.printLine (Colors.hint " · start automatically on boot") + + let _ = + if Stdlib.Cli.UI.Prompt.confirm "Adjust these settings?" then + let intervalIn = + Stdlib.Cli.UI.Prompt.ask + $" interval seconds [{Stdlib.Int.toString (intervalSec ())}]:" + + let _ = + match Stdlib.Int.parse intervalIn with + | Ok secs -> setConfig "apps.sync.intervalMs" (Stdlib.Int.toString (secs * 1000)) + | Error _ -> () + + let portIn = + Stdlib.Cli.UI.Prompt.ask $" port [{Stdlib.Int.toString (servePort ())}]:" + + let _ = + match Stdlib.Int.parse portIn with + | Ok _ -> setConfig "apps.sync-server.port" portIn + | Error _ -> () + + let modeIn = + Stdlib.Cli.UI.Prompt.select + " mode:" + [ "pull+serve"; "pull-only"; "serve-only" ] + + let _ = setConfig "sync.daemon.mode" modeIn + let boot = Stdlib.Cli.UI.Prompt.confirm " start on boot?" + setConfig "sync.daemon.onBoot" (if boot then "yes" else "no") + else + () + + setConfig "sync.daemon.configured" "yes" + +let private daemonStart (state: AppState) : AppState = + let firstRun = + match Darklang.Cli.Config.get "sync.daemon.configured" with + | Some "yes" -> false + | _ -> true + + let _ = + if firstRun then + firstRunDialog () + else + Stdlib.printLine ( + Colors.success $"Automatic sync started — {settingsLine ()}.") + + Stdlib.List.fold (daemonSlugs (daemonMode ())) state (fun s slug -> + Darklang.Cli.Apps.Command.startDaemon s slug) + +let private daemonStop (state: AppState) : AppState = + let _ = + Stdlib.List.map [ "sync"; "sync-server" ] (fun slug -> + match Stdlib.Cli.Daemon.stop slug with + | Ok _ -> Stdlib.printLine (Colors.success $"Stopped {slug}.") + | Error _ -> ()) + + Stdlib.printLine ( + Colors.hint + "Automatic sync off. One-off: dark sync (pull) · dark sync serve (be reachable).") + + state + +let private daemonStatusCmd (state: AppState) : AppState = + Stdlib.printLine "Automatic sync:" + Stdlib.printLine $" pull {Stdlib.Cli.Daemon.statusLine "sync"}" + Stdlib.printLine $" serve {Stdlib.Cli.Daemon.statusLine "sync-server"}" + Stdlib.printLine (Colors.hint $" {settingsLine ()} · settings: dark sync daemon config") + state + +let private daemonConfigShow (state: AppState) : AppState = + Stdlib.printLine "Automatic sync settings:" + Stdlib.printLine $" mode {daemonMode ()} (pull+serve | pull-only | serve-only)" + Stdlib.printLine $" interval {Stdlib.Int.toString (intervalSec ())}s" + Stdlib.printLine $" port {Stdlib.Int.toString (servePort ())}" + Stdlib.printLine $" on-boot {if onBoot () then "yes" else "no"}" + + Stdlib.printLine ( + Colors.hint + " change: dark sync daemon config ") + + state + +/// Validate a daemon config `(key, value)` and map it to its stored `(config-key, store-value)`, or None if +/// the value is invalid. Pure + exported so the validation is directly testable. An invalid value → None → the +/// caller reports an error instead of storing junk that silently reverts to a default (a `port abc` or +/// `on-boot false` that looks like it took but doesn't). +let daemonConfigValue + (key: String) + (value: String) + : Stdlib.Option.Option<(String * String)> = + match key with + | "mode" -> + if Stdlib.List.member_v0 [ "pull+serve"; "pull-only"; "serve-only" ] value then + Stdlib.Option.Option.Some(("sync.daemon.mode", value)) + else + Stdlib.Option.Option.None + | "port" -> + match Stdlib.Int.parse value with + | Ok p -> + if p > 0 && p <= 65535 then + Stdlib.Option.Option.Some(("apps.sync-server.port", value)) + else + Stdlib.Option.Option.None + | Error _ -> Stdlib.Option.Option.None + | "on-boot" -> + if Stdlib.List.member_v0 [ "yes"; "no" ] value then + Stdlib.Option.Option.Some(("sync.daemon.onBoot", value)) + else + Stdlib.Option.Option.None + | "interval" -> + match Stdlib.Int.parse value with + | Ok secs -> + // reject non-positive — a 0/negative interval would make the daemon busy-loop (see nextPollMs clamp). + if secs > 0 then + Stdlib.Option.Option.Some( + ("apps.sync.intervalMs", Stdlib.Int.toString (secs * 1000)) + ) + else + Stdlib.Option.Option.None + | Error _ -> Stdlib.Option.Option.None + | _ -> Stdlib.Option.Option.None + +let private daemonConfigSet + (state: AppState) + (key: String) + (value: String) + : AppState = + let stored = daemonConfigValue key value + + let _ = + match stored with + | Some((configKey, storeValue)) -> + let updated = + Stdlib.Dict.setOverridingDuplicates + (Darklang.Cli.Config.readConfig ()) + configKey + storeValue + + let _ = Darklang.Cli.Config.writeConfig updated + + Stdlib.printLine ( + Colors.success + $"Set {key} = {value}. Apply: dark sync daemon stop, then dark sync daemon start.") + | None -> + Stdlib.printLine ( + Colors.error + $"Can't set '{key}' to '{value}'. Keys: mode | interval (seconds) | port | on-boot (yes/no).") + + state + +let help (state: AppState) : AppState = + [ "dark sync — keep your packages in step with your other instances, over HTTP." + "Local-first: sync is opt-in, and once you connect a peer it stays current." + "" + " dark sync pull now from every instance you're connected to" + " dark sync connect start syncing with an instance (e.g. http://ocean.tailnet:9000)" + " dark sync disconnect stop syncing with an instance" + " dark sync serve let peers pull from you (add --port N; default 9000)" + " dark sync status who you're syncing with, and how current each is" + " dark sync pull pull once from a single instance" + "" + "All your branches sync wholesale — a branch is the same on every instance you connect." + "" + "Automatic (background, and across reboots):" + " dark sync daemon start pull from + serve to your peers on an interval" + " dark sync daemon status whether it's running, and with what settings" + " dark sync daemon config view/adjust interval · port · mode · on-boot" + " dark sync daemon stop turn automatic sync off" + "" + "When two instances edit the same name, sync auto-resolves (latest wins) but records it:" + " dark conflicts review + override sync divergences" ] + |> Stdlib.printLines + + state + + +let execute (state: AppState) (args: List) : AppState = + match args with + | [] -> + // bare `dark sync` = pull now from every connected instance (the daemon automates this). + match Darklang.Sync.peers () with + | [] -> + Stdlib.printLine "You're not syncing with anyone yet." + + Stdlib.printLine ( + Colors.hint " dark sync connect sync with one of your instances") + + state + | ps -> + let results = Stdlib.List.map ps (fun p -> Darklang.Sync.pull p) + + let pulled = + Stdlib.List.fold results 0 (fun acc r -> + match r with + | Ok n -> acc + n + | Error _ -> acc) + + let unreachable = + Stdlib.List.fold results 0 (fun acc r -> + match r with + | Ok _ -> acc + | Error _ -> acc + 1) + + let reached = (Stdlib.List.length ps) - unreachable + + let _ = + if unreachable > 0 then + Stdlib.printLine ( + Colors.error + $"Couldn't reach {Stdlib.Int.toString unreachable} of {plural (Stdlib.List.length ps) "instance"}") + else + () + + if pulled > 0 then + Stdlib.printLine ( + Colors.success + $"Pulled {plural pulled "change"} from {plural reached "instance"}") + else if reached > 0 then + Stdlib.printLine ( + Colors.success + $"Already up to date with {plural reached "instance"}") + else + () + + state + + | [ "status" ] -> + match Darklang.Sync.status () with + | [] -> + Stdlib.printLine "You're not syncing with anyone yet." + + Stdlib.printLine ( + Colors.hint " dark sync connect sync with one of your instances") + + state + | sts -> + let header = + $"Syncing with {plural (Stdlib.List.length sts) "instance"} (run `dark sync` to pull the latest):" + + // Pad each peer to the longest so the state column lines up. + let width = + Stdlib.List.fold sts 0 (fun acc pc -> + let len = Stdlib.String.length (Stdlib.Tuple2.first pc) + if len > acc then len else acc) + + let lines = + Stdlib.List.map sts (fun pc -> + let peer = Stdlib.Tuple2.first pc + let cursor = Stdlib.Tuple2.second pc + + let padded = + match Stdlib.String.padEnd peer " " width with + | Ok s -> s + | Error _ -> peer + + // Cursor is the PEER's rowid — meaningless to show. What's honest is whether we've pulled it yet; + // "current" is always as-of the last pull (we can't know if the peer moved without pulling). + let mark = if cursor == 0L then "(not pulled yet)" else "(pulled)" + $" {padded} {mark}") + + // Every branch syncs wholesale — the same branches exist on every instance you connect. + let branchNames = + Stdlib.List.map (Darklang.SCM.Branch.list ()) (fun b -> b.name) + + let branchLine = + match branchNames with + | [] -> [] + | names -> + [ Colors.hint + $" {plural (Stdlib.List.length names) "branch"} syncing: {Stdlib.String.join names ", "}" ] + + Stdlib.printLines ( + Stdlib.List.append (Stdlib.List.append [ header ] lines) branchLine) + + state + + | [ "connect"; peer ] -> + match Darklang.Sync.connect peer with + | Ok _ -> + // Probe the peer now, so a wrong URL/port shows up here (when you can fix it) instead of on a later + // silent `dark sync`. The peer is added either way — an offline instance will just sync once it's up. + match Darklang.Sync.reachable peer with + | Ok n -> + Stdlib.printLine ( + Colors.success $"Now syncing with {peer} — reachable ({Stdlib.Int64.toString n} ops)") + Stdlib.printLine ( + Colors.hint " dark sync pull now · dark sync daemon start keep current on boot") + | Error _ -> + Stdlib.printLine (Colors.success $"Added {peer}") + Stdlib.printLine ( + Colors.hint + " can't reach it yet — check the URL and that the instance is running `dark sync serve`; it'll sync once it's up") + | Error e -> Stdlib.printLine (Colors.error e) + + state + + | [ "pull"; peer ] -> + match Darklang.Sync.pull peer with + | Ok n -> + if n == 0 then + Stdlib.printLine (Colors.success $"Already up to date with {peer}") + else + Stdlib.printLine ( + Colors.success $"Pulled {plural n "change"} from {peer}") + | Error e -> Stdlib.printLine (Colors.error e) + + state + + | [ "disconnect"; peer ] -> + if Darklang.Sync.disconnect peer then + Stdlib.printLine (Colors.success $"Stopped syncing with {peer}") + else + Stdlib.printLine (Colors.hint $"You weren't syncing with {peer}") + + state + + | [ "daemon" ] + | [ "daemon"; "status" ] -> daemonStatusCmd state + | [ "daemon"; "start" ] -> daemonStart state + | [ "daemon"; "stop" ] -> daemonStop state + | [ "daemon"; "config" ] -> daemonConfigShow state + | [ "daemon"; "config"; key; value ] -> daemonConfigSet state key value + + | [ "serve" ] -> serveOn 9000 state + | [ "serve"; "--port"; portStr ] -> + match Stdlib.Int.parse portStr with + | Ok p -> serveOn p state + | Error _ -> + Stdlib.printLine (Colors.error $"Invalid --port: {portStr}") + state + + | [ "help" ] -> help state + | _ -> + Stdlib.printLine (Colors.error $"Unknown: dark sync {Stdlib.String.join args " "}") + Stdlib.printLine "" + help state + + +let complete + (state: AppState) + (args: List) + : List = + match args with + | [] -> + [ "status"; "connect"; "disconnect"; "serve"; "pull"; "daemon" ] + |> Stdlib.List.map Completion.simple + | _ -> [] diff --git a/packages/darklang/stdlib/eventLog.dark b/packages/darklang/stdlib/eventLog.dark new file mode 100644 index 0000000000..7cda13204a --- /dev/null +++ b/packages/darklang/stdlib/eventLog.dark @@ -0,0 +1,139 @@ +module Darklang.Stdlib.EventLog + +// The native read/append API over the three op-log tables (`package_ops`, `branch_ops`, `resolutions`). +// Read the events SINCE a cursor (a peer serves them; the events come back as a filterable Stream), and +// APPEND events received from elsewhere (folding happens invisibly). Everything travels as OPS, never a +// database file. Sync is the primary consumer. +// +// Records and the Stream are built NATIVELY (`packageOpsReadNative` / `packageOpsAppendNative` / …), so a +// 1000-op batch stays milliseconds — never per-row Dark interpreter overhead. +// +// CLEANUP(eventlog-generic): a generic first-class `EventLog` type-triple (like `DDB`/`KTDB`) was surveyed + +// prototyped, then dropped for these concrete per-log tables + native builtins (simpler, and the perf lives in +// the native reader). A truly generic event-log primitive (tracing/messaging/cron as named logs on one +// substrate) is a plausible future direction — premature for this PR. + +/// An opaque position in a log. You advance it by reading, and resume from where you left off. Compare or +/// serialize it, but don't depend on the wrapped value — it's the log's private cursor representation. +type Cursor = Cursor of Int64 + +/// One event in transit: an op and the commit it belongs to. `op` is the op_blob as hex. +type Event = + { id: String + op: String + branchId: String + commitHash: String + originTs: String } + +/// A commit an event references. +type Commit = + { hash: String + message: String + branchId: String + accountId: String + createdAt: String } + +/// A bounded read from the log: the commits the events reference, the events as a Stream (filter before +/// draining — e.g. by branch), and the cursor to resume from. +type Batch = + { commits: List + events: Stream + next: Cursor } + +/// Wrap a raw Int64 log position as a Cursor (e.g. a cursor loaded from a peer-cursor table). +let cursorFromInt (n: Int64) : Cursor = Cursor.Cursor n + +/// The raw Int64 position a cursor wraps — for callers that persist it locally. +let cursorToInt (cursor: Cursor) : Int64 = + match cursor with + | Cursor c -> c + +/// Read at most committed package ops after : the commits they reference, the +/// events as a filterable Stream, and the cursor to resume from. Reads natively (fast), so a large log +/// transfers in bounded batches — loop on the returned cursor until the events come back empty. +let readSince (cursor: Cursor) (limit: Int64) : Batch = + let cur = + match cursor with + | Cursor c -> c + + let (commits, events, next) = + Builtin.packageOpsReadNative cur limit + + Batch { commits = commits; events = events; next = next } + +/// Append received commits + events into the package op log; folding is invisible. Returns how many ops were +/// NEWLY applied (0 = all already present) — the resume cursor comes from `readSince`'s `next`. Idempotent: +/// re-appending the same events is a no-op (content-addressed ids). +let append (commits: List) (events: List) : Int = + Builtin.packageOpsAppendNative commits events + + +// ── the branch-structure log ────────────────────────────────────────────────────────────────────── +// `branch_ops` carries the branch lifecycle (create / commit / rebase / merge / archive). Peers sync it so +// they LEARN branches — the structure `package_ops` events reference by branch_id. Branch ops are +// self-contained (they carry their own branch/commit data), so an event is just (id, op) — no side commits. + +/// One branch op in transit. `op` is the branch-op blob as hex. +type BranchOpEvent = + { id: String + op: String + // authoring stamp, PRESERVED across sync so the receiver's structural LWW (rebase) converges by + // creation time rather than arrival order (mirrors Event.originTs for package ops) + originTs: String } + +/// A bounded read from the branch-ops log: the ops as a Stream, and the cursor to resume from. +type BranchBatch = + { events: Stream + next: Cursor } + +/// Read at most branch ops after — as a Stream + the resume cursor. Built +/// natively. +let readBranchOps (cursor: Cursor) (limit: Int64) : BranchBatch = + let cur = + match cursor with + | Cursor c -> c + + let (events, next) = Builtin.branchOpsReadNative cur limit + BranchBatch { events = events; next = next } + +/// Apply received branch ops into the branch-ops log; folds into branches/commits. Returns how many were +/// processed. Idempotent — content-addressed, so re-applying is a no-op. +let appendBranchOps (events: List) : Int = + Builtin.branchOpsAppendNative events + + +// ── the resolutions log ─────────────────────────────────────────────────────────────────────────── +// `resolutions` carries synced human/policy overrides that overlay the op-fold. Peers apply them AFTER +// package ops, so a "keep mine" decision converges everywhere. Each is idempotent (id-keyed) and LWW-gated +// by its own `at` stamp. + +/// One resolution in transit — a decision to bind `location` to `chosenHash` (content of `itemKind`). +type ResolutionEvent = + { id: String + branchId: String + location: String + itemKind: String + chosenHash: String + resolvedBy: String + at: String } + +/// A bounded read from the resolutions log. +type ResolutionBatch = + { events: Stream + next: Cursor } + +/// Read at most resolutions after — as a Stream + resume cursor. +let readResolutions (cursor: Cursor) (limit: Int64) : ResolutionBatch = + let cur = + match cursor with + | Cursor c -> c + + let (events, next) = + Builtin.resolutionsReadNative cur limit + + ResolutionBatch { events = events; next = next } + +/// Apply received resolutions — record + overlay onto the locations projection. Returns how many were +/// processed. Idempotent + LWW-gated. +let appendResolutions (events: List) : Int = + Builtin.resolutionsAppendNative events diff --git a/packages/darklang/stdlib/sqlite.dark b/packages/darklang/stdlib/sqlite.dark new file mode 100644 index 0000000000..61d5195cd6 --- /dev/null +++ b/packages/darklang/stdlib/sqlite.dark @@ -0,0 +1,114 @@ +module Darklang.Stdlib.Sqlite + +/// A single SQLite cell value — the five storage classes SQLite uses. +/// A query returns rows of these so cell types survive the round-trip (in +/// particular for BLOB columns like an op log's serialized blob), +/// rather than being stringified. +type Value = + | Null + | Int of Int64 + | Real of Float + | Text of String + | Bytes of Blob + + +/// The String of a cell (Some), else None — pull a text column out of a row. +let asText (v: Value) : Stdlib.Option.Option = + match v with + | Text s -> Stdlib.Option.Option.Some s + | _ -> Stdlib.Option.Option.None + +/// The Int of an cell (Some), else None. +let asInt (v: Value) : Stdlib.Option.Option = + match v with + | Int i -> Stdlib.Option.Option.Some i + | _ -> Stdlib.Option.Option.None + + +/// Run a statement (CREATE/INSERT/UPDATE/DELETE/DDL) against the SQLite file at +/// ; returns the number of rows affected. Users call this, not the +/// raw builtin. +let exec (dbPath: String) (sql: String) : Stdlib.Result.Result = + Builtin.sqliteExec dbPath sql + +/// Like but binds to @p0..@pN placeholders in , +/// so values are never string-spliced into SQL (injection-safe). +let execP (dbPath: String) (sql: String) (params: List) : Stdlib.Result.Result = + Builtin.sqliteExecP dbPath sql params + +/// Run a SELECT against ; returns each row as a dict of column name +/// to a typed (so ints/reals/blobs keep their types). +let query + (dbPath: String) + (sql: String) + : Stdlib.Result.Result>, String> = + Builtin.sqliteQuery dbPath sql + +/// Like but binds to @p0..@pN placeholders (injection-safe). +let queryP + (dbPath: String) + (sql: String) + (params: List) + : Stdlib.Result.Result>, String> = + Builtin.sqliteQueryP dbPath sql params + + +// ── convenience layer (pure Dark on top of exec/query) ────────────────────────────────────────────── +// So callers don't hand-roll the `query → match Ok [row] → Dict.get → asText` dance. Callers above this +// shouldn't have to think about rows and cells — they ask for a column, a scalar, or a field, and get a +// typed value back. + +/// The text value of column in , or None if missing/non-text. +let textField (row: Dict) (col: String) : Stdlib.Option.Option = + match Stdlib.Dict.get row col with + | Some v -> asText v + | None -> Stdlib.Option.Option.None + +/// The Int value of column in , or None if missing/non-int. +let intField (row: Dict) (col: String) : Stdlib.Option.Option = + match Stdlib.Dict.get row col with + | Some v -> asInt v + | None -> Stdlib.Option.Option.None + +/// The first row of (or None if it returned no rows / errored). +let queryOne (dbPath: String) (sql: String) : Stdlib.Option.Option> = + match query dbPath sql with + | Ok(row :: _) -> Stdlib.Option.Option.Some row + | _ -> Stdlib.Option.Option.None + +/// Like but with injection-safe params. +let queryOneP + (dbPath: String) + (sql: String) + (params: List) + : Stdlib.Option.Option> = + match queryP dbPath sql params with + | Ok(row :: _) -> Stdlib.Option.Option.Some row + | _ -> Stdlib.Option.Option.None + +/// Column of every row of , as a list of text (non-text/missing cells dropped). +let column (dbPath: String) (sql: String) (col: String) : List = + match query dbPath sql with + | Ok rows -> Stdlib.List.filterMap rows (fun row -> textField row col) + | Error _ -> [] + +/// The Int in column of the first row of — e.g. a `count(*)`. +let scalarInt + (dbPath: String) + (sql: String) + (col: String) + : Stdlib.Option.Option = + match queryOne dbPath sql with + | Some row -> intField row col + | None -> Stdlib.Option.Option.None + +/// Like but with injection-safe params — e.g. a per-key lookup. +let scalarIntP + (dbPath: String) + (sql: String) + (params: List) + (col: String) + : Stdlib.Option.Option = + match queryOneP dbPath sql params with + | Some row -> intField row col + | None -> Stdlib.Option.Option.None diff --git a/packages/darklang/sync.dark b/packages/darklang/sync.dark new file mode 100644 index 0000000000..9b82b48aad --- /dev/null +++ b/packages/darklang/sync.dark @@ -0,0 +1,361 @@ +module Darklang.Sync + +// Sync = replicate the op log over HTTP. A peer SERVES its committed events since a cursor (`wireSince`, the +// `GET /sync/events?since=` body); a puller GETs them and appends them (folding happens invisibly). Everything +// that crosses the wire is OPS — never a database file, never ATTACH. Sync owns no event mechanics: it's thin +// policy (transport + per-peer cursors) on the general event-log seam, `Stdlib.EventLog`. + +/// The wire (JSON): the version handshake + one bounded batch from EACH synced log. `release` lets a puller +/// refuse a peer on a different Dark release. `branchOps` (structure) is applied before `packageOps` (content) +/// so package ops' branch_ids resolve on the receiver. Each log carries its own resume cursor. +type Wire = + { release: Int + branchEvents: List + branchCursor: Stdlib.EventLog.Cursor + commits: List + packageEvents: List + packageCursor: Stdlib.EventLog.Cursor + resolutionEvents: List + resolutionCursor: Stdlib.EventLog.Cursor } + +/// The `GET /sync/events?package=&branch=&resolution=` body: this instance's Release + one bounded +/// batch from each log after the given cursors, as JSON. Served by `Sync.Server`, pulled by `Sync.pull`. +let wireSince + (packageCursor: Int64) + (branchCursor: Int64) + (resolutionCursor: Int64) + : String = + // One bounded batch PER LOG so a large log never becomes one giant response — the puller loops on the + // cursors until all come back empty. 1000 ops (~1 MB) balances round-trips against response size; the + // native reads make even a whole log milliseconds, so the batch is for bounded responses + resumability. + let branchBatch = + Stdlib.EventLog.readBranchOps + (Stdlib.EventLog.cursorFromInt branchCursor) + 1000L + + let pkgBatch = + Stdlib.EventLog.readSince + (Stdlib.EventLog.cursorFromInt packageCursor) + 1000L + + let resolutionBatch = + Stdlib.EventLog.readResolutions + (Stdlib.EventLog.cursorFromInt resolutionCursor) + 1000L + + // Wholesale sync: every committed branch/package/resolution op in the batch crosses the wire, so a branch is + // the SAME on every instance you sync (a branch `whatever` is `whatever` everywhere — never scoped by peer or + // account). Per-branch controls (private / follow) were removed as a half-measure; a future PR can add real + // per-branch scoping properly. // CLEANUP(per-branch-sync): reintroduce scoped controls when done right. + Stdlib.Json.serialize ( + Wire + { release = Builtin.currentRelease() + branchEvents = Stdlib.Stream.toList branchBatch.events + branchCursor = branchBatch.next + commits = pkgBatch.commits + packageEvents = Stdlib.Stream.toList pkgBatch.events + packageCursor = pkgBatch.next + resolutionEvents = Stdlib.Stream.toList resolutionBatch.events + resolutionCursor = resolutionBatch.next } + ) + + +// ── peer config + per-peer resume cursors (LOCAL, per-instance; never synced, like `caps`) ── + +let private syncDb () : String = + let db = Builtin.localDbPath () + + let _ = + Stdlib.Sqlite.exec db "CREATE TABLE IF NOT EXISTS sync_peers_v0 (url TEXT PRIMARY KEY)" + + // One resume cursor per (peer, log-kind) — "package_ops" and "branch_ops" advance independently. + let _ = + Stdlib.Sqlite.exec + db + "CREATE TABLE IF NOT EXISTS sync_cursors_v1 (peer TEXT NOT NULL, kind TEXT NOT NULL, cursor INTEGER NOT NULL, PRIMARY KEY (peer, kind))" + + db + +/// The peers this instance pulls from — http(s) URLs only. Local config; never travels. +let peers () : List = + Stdlib.Sqlite.column (syncDb ()) "SELECT url FROM sync_peers_v0 ORDER BY url" "url" + +// The one message for "that's not a peer" — a peer is always an http(s) URL (a running instance), never a +// file. Shared by connect + pull so both reject a `.db`/path identically. +let private peerMustBeUrl : String = + "A peer is a URL like http://ocean.tailnet:9000 — sync exchanges ops with a running instance over HTTP, not a .db file." + +/// Connect a peer by its URL. Sync talks to running instances over HTTP — a `.db` file is not a peer. +let connect (url: String) : Stdlib.Result.Result = + if Stdlib.String.startsWith url "http" then + let _ = + Stdlib.Sqlite.execP + (syncDb ()) + "INSERT OR IGNORE INTO sync_peers_v0 (url) VALUES (@p0)" + [ url ] + + Stdlib.Result.Result.Ok() + else + Stdlib.Result.Result.Error peerMustBeUrl + +/// Stop syncing with — forget the peer and drop its resume cursor. Returns whether it was +/// actually a peer, so the caller can tell you if you weren't syncing with it. Purely local; the peer is +/// untouched (this just stops *you* pulling from it). +let disconnect (url: String) : Bool = + let wasConnected = Stdlib.List.member_v0 (peers ()) url + let _ = + Stdlib.Sqlite.execP (syncDb ()) "DELETE FROM sync_peers_v0 WHERE url = @p0" [ url ] + + let _ = + Stdlib.Sqlite.execP (syncDb ()) "DELETE FROM sync_cursors_v1 WHERE peer = @p0" [ url ] + + wasConnected + +let private cursorFor (peer: String) (kind: String) : Int64 = + (Stdlib.Sqlite.scalarIntP + (syncDb ()) + "SELECT cursor FROM sync_cursors_v1 WHERE peer = @p0 AND kind = @p1" + [ peer; kind ] + "cursor") + |> Stdlib.Option.withDefault 0L + +let private setCursor (peer: String) (kind: String) (cursor: Int64) : Unit = + let _ = + Stdlib.Sqlite.execP + (syncDb ()) + "INSERT OR REPLACE INTO sync_cursors_v1 (peer, kind, cursor) VALUES (@p0, @p1, @p2)" + [ peer; kind; Stdlib.Int64.toString cursor ] + + () + + +// ── the client: pull a peer's new ops over HTTP + apply (folding invisible) ── + +// The ONE reference to the SSRF-unguarded fetch builtin. Every sync GET (events, blobs) goes through here, so +// the raw builtin has a single reviewable call site (the security surface) even as more channels are added. +let private syncHttpGet (url: String) : Stdlib.Result.Result = + Builtin.httpGetUnsafeBytes url + +/// Quick liveness probe of a peer: GET /sync/health. Ok n = reachable, with the peer's committed op count; +/// Error = couldn't reach it (wrong URL, not serving, or a different network). `connect` uses this so a typo'd +/// URL surfaces the moment you type it, instead of on a later silent `dark sync` that just says "couldn't reach". +let reachable (url: String) : Stdlib.Result.Result = + match syncHttpGet $"{url}/sync/health" with + | Error e -> Stdlib.Result.Result.Error e + | Ok body -> + match Stdlib.Blob.toString body with + | Error _ -> Stdlib.Result.Result.Error "unreadable response" + | Ok text -> + // The health body is "ok ops=". + if Stdlib.String.startsWith text "ok" then + match Stdlib.String.split text "=" with + | [ _; nStr ] -> + match Stdlib.Int64.parse (Stdlib.String.trim nStr) with + | Ok n -> Stdlib.Result.Result.Ok n + | Error _ -> Stdlib.Result.Result.Ok 0L + | _ -> Stdlib.Result.Result.Ok 0L + else + Stdlib.Result.Result.Error "not a Dark sync endpoint" + +// One pull batch: GET the peer's next bounded batch of ops after our cursor, apply them, advance the cursor, and recurse +// until a batch comes back empty (caught up). Advancing the cursor per batch means an interrupted pull resumes +// where it left off. accumulates the total across batches. +let rec pullLoop + (peer: String) + (applied: Int) + (budget: Int) + : Stdlib.Result.Result = + // Bounded against a misbehaving/hostile peer that never lets us catch up: `budget` caps total batches (100k + // × 1000 ops ≫ any real store), and the strict-advance check at the recursion below stops a peer that + // returns events without moving any cursor forward. + let pkgSent = cursorFor peer "package_ops" + let branchSent = cursorFor peer "branch_ops" + let resSent = cursorFor peer "resolutions" + + let url = + $"{peer}/sync/events?package={Stdlib.Int64.toString pkgSent}&branch={Stdlib.Int64.toString branchSent}&resolution={Stdlib.Int64.toString resSent}" + + match syncHttpGet url with + | Ok body -> + match Stdlib.Blob.toString body with + | Ok wire -> + match Stdlib.Json.parse wire with + | Ok(w) -> + if w.release != Builtin.currentRelease() then + Stdlib.Result.Result.Error + $"{peer} is on Dark release {Stdlib.Int.toString w.release}; you're on {Stdlib.Int.toString (Builtin.currentRelease())} — upgrade to the same release to sync" + else + // Apply branch STRUCTURE before content, so package ops' branch_ids resolve on this side. Each append + // returns the count applied, or -1 on a DB error (distinct from 0 = idempotent/nothing new). We + // compute all three BEFORE advancing any cursor: on a DB error we must NOT advance, or the lost ops + // would be silently skipped past (divergence) until the peer is reconnected. A malformed individual + // op is a parse-skip inside the append (correctly counted as applied), not a -1. + let branchApplied = + if Stdlib.List.length w.branchEvents == 0 then + 0 + else + Stdlib.EventLog.appendBranchOps w.branchEvents + + let packageApplied = + if Stdlib.List.length w.packageEvents == 0 then + 0 + else + Stdlib.EventLog.append w.commits w.packageEvents + + // Resolutions LAST — they overlay the folded bindings, so a peer's "keep mine" override wins and + // converges. Each is idempotent + LWW-gated by its own `at`. + let resolutionApplied = + if Stdlib.List.length w.resolutionEvents == 0 then + 0 + else + Stdlib.EventLog.appendResolutions w.resolutionEvents + + if + branchApplied < 0 || packageApplied < 0 || resolutionApplied < 0 + then + Stdlib.Result.Result.Error + $"{peer}: a database error applying ops — stopped without advancing the cursor (retries on the next pull)" + else + let _ = setCursor peer "branch_ops" (Stdlib.EventLog.cursorToInt w.branchCursor) + let _ = setCursor peer "package_ops" (Stdlib.EventLog.cursorToInt w.packageCursor) + + let _ = + setCursor peer "resolutions" (Stdlib.EventLog.cursorToInt w.resolutionCursor) + + let caughtUp = + Stdlib.List.length w.branchEvents == 0 + && Stdlib.List.length w.packageEvents == 0 + && Stdlib.List.length w.resolutionEvents == 0 + + // A well-behaved peer that returns events moves at least one cursor strictly forward; if it + // doesn't, it's replaying and we'd loop forever — stop. + let advanced = + (Stdlib.EventLog.cursorToInt w.packageCursor) > pkgSent + || (Stdlib.EventLog.cursorToInt w.branchCursor) > branchSent + || (Stdlib.EventLog.cursorToInt w.resolutionCursor) > resSent + + let total = + applied + branchApplied + packageApplied + resolutionApplied + + if caughtUp then + Stdlib.Result.Result.Ok applied + else if Stdlib.Bool.not advanced then + Stdlib.Result.Result.Error + $"{peer} returned ops but advanced no cursor — stopping (misbehaving peer)" + else if budget <= 1 then + Stdlib.Result.Result.Error + $"{peer} kept sending ops without catching up — stopped after the batch budget (possible misbehaving peer)" + else + pullLoop peer total (budget - 1) + | Error _ -> + Stdlib.Result.Result.Error $"{peer} sent a reply I couldn't read" + | Error _ -> Stdlib.Result.Result.Error $"{peer} sent a reply I couldn't read" + | Error _ -> Stdlib.Result.Result.Error $"Couldn't reach {peer}" + +/// After a pull's ops apply, fetch the content blobs we now lack. A value's large `package_blobs` content +/// rides its OWN channel, not the op stream — so the ops can reference a blob we don't have yet. GET the peer's +/// manifest, keep the hashes we're missing, GET + insert each. Best-effort: a failed GET or empty body is +/// skipped — content-addressed, so it retries + dedups on the next pull. Returns the count inserted. +let private fetchMissingBlobs (peer: String) : Int = + let manifestUrl = $"{peer}/sync/blobs" + + match syncHttpGet manifestUrl with + | Ok body -> + match Stdlib.Blob.toString body with + | Ok manifest -> + let offered = + Stdlib.List.filter (Stdlib.String.split manifest "\n") (fun h -> h != "") + + Stdlib.List.fold (Builtin.syncBlobMissing offered) 0 (fun acc h -> + let blobUrl = $"{peer}/sync/blob?hash={h}" + + match syncHttpGet blobUrl with + | Ok b -> + match Stdlib.Blob.toString b with + | Ok b64 -> if Builtin.syncBlobInsert h b64 then acc + 1 else acc + | Error _ -> acc + | Error _ -> acc) + | Error _ -> 0 + | Error _ -> 0 + +/// Pull new ops from (an http URL) since our stored cursor, in bounded batches until caught up, +/// applying each and advancing the cursor. Ok(n) = n events transferred (0 = already current); Error = the +/// peer was unreachable, version-skewed, or spoke nonsense. Honest about the difference so a caller never +/// reports "up to date" when it actually couldn't reach the peer. +let pull (peer: String) : Stdlib.Result.Result = + if Stdlib.String.startsWith peer "http" then + match pullLoop peer 0 100000 with + | Ok applied -> + // fetch the content blobs those ops reference but we lack (best-effort; retries next pull) + let _ = fetchMissingBlobs peer + Stdlib.Result.Result.Ok applied + | Error e -> Stdlib.Result.Result.Error e + else + Stdlib.Result.Result.Error peerMustBeUrl + +/// Pull from every configured peer; returns the total events applied (unreachable peers contribute 0). Used by +/// the background daemon, which pulls what it can and stays quiet about peers that happen to be offline. +let pullAll () : Int = + Stdlib.List.fold (peers ()) 0 (fun acc peer -> + match pull peer with + | Ok n -> acc + n + | Error _ -> acc) + +/// Each connected peer paired with how far we've pulled it (the peer's rowid; 0 = never pulled). For +/// `dark sync status` — so you can see, at a glance, who you sync with and whether you're current. +let status () : List<(String * Int64)> = + Stdlib.List.map (peers ()) (fun peer -> (peer, cursorFor peer "package_ops")) + + +// ── the autosync daemon: pull from every peer on an interval, in the background. Driven by +// `dark sync daemon start/stop` on the shared Stdlib.Cli.Daemon substrate. Poll-based v1. ── + +// The IDLE poll interval (30s): a converged tailnet settles here — two small GETs/min per peer, each a no-op +// when you're already up to date. Sync isn't chat. It's a CEILING, not a fixed gap: after a pull that saw +// changes the daemon snaps to a responsive floor and backs off (doubling) up to this while idle, so a real +// commit propagates within ~the floor without hammering a quiet tailnet. Overridable via `dark sync daemon +// config interval N` (stored as `apps..intervalMs`), read on start. +let private defaultPollIntervalMs : Int = 30000 + +// The responsive floor — the gap right after a pull that saw changes. +let private pollFloorMs : Int = 2000 + +// Adaptive interval (pure): snap to the floor after changes, else back off (double) up to the ceiling. This +// is what lets a converged tailnet quiet down instead of polling at the floor forever. +let nextPollMs (sawChanges: Bool) (currentMs: Int) (ceilingMs: Int) : Int = + if sawChanges then + pollFloorMs + else + let doubled = currentMs * 2 + if doubled > ceilingMs then ceilingMs else doubled + +let rec syncLoop (intervalMs: Int) (ceilingMs: Int) (remaining: Int) : Int = + if remaining <= 0 then + 0 + else + let applied = pullAll () + let _ = Stdlib.Cli.Posix.sleep (Stdlib.Int.toFloat intervalMs) + // cursor delta > 0 ⇒ changes arrived ⇒ stay responsive; a converged/empty pull ⇒ back off + syncLoop (nextPollMs (applied > 0) intervalMs ceilingMs) ceilingMs (remaining - 1) + +/// The autosync daemon entrypoint: claim the pidfile, then pull from every peer forever (ended by +/// `dark sync daemon stop`/SIGTERM). Started by `dark sync daemon start`. +let daemon (name: String) : Int = + let _ = + match Stdlib.Cli.Daemon.claimPidfile name with + | Error e -> Stdlib.printLine $"{name}: could not write pidfile: {e}" + | Ok _ -> + Stdlib.printLine + $"{name}: keeping your peers in sync in the background (pid {Stdlib.Int.toString (Stdlib.Cli.Sys.currentPid ())})" + + // The configured interval is the idle CEILING (set by `dark sync daemon config interval N`); the daemon + // starts responsive (at the floor) and backs off toward this while a converged tailnet is quiet. Clamp to at + // least the floor: a 0/negative interval (bad config that slipped past validation) would make `sleep 0` + // busy-loop, hammering peers with no delay. + let configured = + Darklang.Cli.Config.getInt $"apps.{name}.intervalMs" defaultPollIntervalMs + + let ceilingMs = + if configured < pollFloorMs then pollFloorMs else configured + + syncLoop pollFloorMs ceilingMs 1000000000 diff --git a/packages/darklang/sync/server.dark b/packages/darklang/sync/server.dark new file mode 100644 index 0000000000..4c7869c88b --- /dev/null +++ b/packages/darklang/sync/server.dark @@ -0,0 +1,92 @@ +module Darklang.Sync.Server + +// A tiny HTTP sync server: a peer serves its op log so others can pull it over the network (the tailnet). +// Run with `dark serve Darklang.Sync.Server.router --port ` and expose it over your tailnet with +// `dark devices serve `. +// +// The wire is JSON — `Darklang.Sync.wireSince` (← `Stdlib.EventLog.readSince`): the serving Release, the batch's +// commits, its events ((id, opBlobHex, branchId, commitHash, originTs) — the op_blob rides as hex), and the +// cursor. Committed ops only (WIP stays local); one bounded batch per request. No .db files — ops over HTTP. +// +// CLEANUP(sync-security): this endpoint is UNAUTHENTICATED and serves EVERY committed op on EVERY branch +// (plus each commit's author account_id) to anyone who can reach the port — and `dark serve` binds all +// interfaces, not just loopback/tailnet. Peers are FULLY TRUSTED for now (they're your own instances / +// trusted collaborators, reached over a private tailnet). A future hardening: a shared-token/auth check, +// and bind loopback by default + expose via `dark devices serve`. + +// GET /sync/health — liveness + servable op count. Counts COMMITTED ops only — the ones a peer can actually +// pull (WIP stays local) — so two instances comparing counts to gauge convergence are comparing like for like. +let healthFn (req: Stdlib.Http.Request) : Stdlib.Http.Response = + let db = Builtin.localDbPath () + + let n = + (Stdlib.Sqlite.scalarInt + db + "SELECT count(*) AS n FROM package_ops WHERE commit_hash IS NOT NULL" + "n") + |> Stdlib.Option.withDefault 0L + + Stdlib.Http.responseWithText $"ok ops={Stdlib.Int64.toString n}" 200 + +let healthHandler : Stdlib.HttpServer.Handler = + Stdlib.HttpServer.Handler + { route = "/sync/health"; method = "GET"; handler = healthFn } + + +// GET /sync/events?package=&branch=&resolution= — one bounded batch from each log after the given cursors, +// as the JSON wire. Missing/garbage cursor defaults to 0 (from the start). +let private parseCursor (url: String) (param: String) : Int64 = + match Stdlib.Dict.get (Stdlib.Http.parseQueryString url) param with + | Some s -> + match Stdlib.Int64.parse s with + | Ok n -> n + | Error _ -> 0L + | None -> 0L + +let eventsFn (req: Stdlib.Http.Request) : Stdlib.Http.Response = + // Each log's committed events after its cursor, as the JSON wire (Darklang.Sync.wireSince). A puller GETs + // this and Sync.pull applies it (branch structure first) — pure ops over HTTP. + Stdlib.Http.responseWithText + (Darklang.Sync.wireSince + (parseCursor req.url "package") + (parseCursor req.url "branch") + (parseCursor req.url "resolution")) + 200 + +let eventsHandler : Stdlib.HttpServer.Handler = + Stdlib.HttpServer.Handler + { route = "/sync/events"; method = "GET"; handler = eventsFn } + + +// The HTTP blob channel — a value's large `package_blobs` content rides its own transfer, not the op stream. +// Wholesale, like the op wire: every content hash this instance holds is offered (content-addressed + shared +// across branches). // CLEANUP(per-branch-sync): scope this alongside the ops when per-branch controls return. + +// GET /sync/blobs — the manifest: every content hash this instance holds, newline-joined. +let blobsFn (req: Stdlib.Http.Request) : Stdlib.Http.Response = + Stdlib.Http.responseWithText (Builtin.syncBlobManifest ()) 200 + +let blobsHandler : Stdlib.HttpServer.Handler = + Stdlib.HttpServer.Handler + { route = "/sync/blobs"; method = "GET"; handler = blobsFn } + +// GET /sync/blob?hash= — the base64 bytes for one content hash (empty body if this instance lacks it). +let private parseHash (url: String) : String = + match Stdlib.Dict.get (Stdlib.Http.parseQueryString url) "hash" with + | Some h -> h + | None -> "" + +let blobFn (req: Stdlib.Http.Request) : Stdlib.Http.Response = + Stdlib.Http.responseWithText (Builtin.syncBlobBytes (parseHash req.url)) 200 + +let blobHandler : Stdlib.HttpServer.Handler = + Stdlib.HttpServer.Handler + { route = "/sync/blob"; method = "GET"; handler = blobFn } + + +let handlers : List = + [ healthHandler; eventsHandler; blobsHandler; blobHandler ] + +/// The sync server router — pass to `dark serve Darklang.Sync.Server.router --port `. +let router (req: Stdlib.Http.Request) : Stdlib.Http.Response = + Stdlib.HttpServer.routeRequest handlers req From fae69e481b123b65b591e3ec9ea3c23c94c3467e Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Sun, 12 Jul 2026 13:11:06 -0400 Subject: [PATCH 004/172] Sync: the test suite MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cross-instance convergence is the property that matters, tested at three levels plus supporting unit coverage. - `MultiInstance.Tests.fs` — in-process, true multi-store (a swappable test connection repoints LibDB at each instance). Branch sync + identity consistency, package convergence, cross-store conflict + LWW + recorded divergence, keep-mine/keep-theirs, resolution-survives-rebuild, rebase and deprecation convergence, pagination. Carries an in-process CLI driver so a test can assert on what the CLI actually renders (incl. a `dark conflicts` display regression). - `SyncScenarios.Tests.fs` — fast one-store order-independence (= convergence). - `OpsProjections.Tests.fs` — receiveOps idempotency/convergence, the origin_ts MIN-reconcile, detection, the full conflict → resolution flow. - `SyncE2E.Tests.fs` — flag-gated (DARK_E2E=1) heavy tier: real `dark` processes syncing over real HTTP — the server, pull loop, cursors, and process isolation the in-process tests can't reach. Basic sync, conflict race + keep-mine/keep-theirs, branch sync, offline-peer honesty. - Testfiles (blob channel, adaptive poll, eventlog, sqlite) + unit coverage for alpha-normalized hashing and the Release model. (backend/tests, backend/testfiles) Co-Authored-By: Claude Opus 4.8 --- .../execution/cli/sync-per-branch.dark | 85 ++ .../testfiles/execution/stdlib/eventlog.dark | 10 + .../testfiles/execution/stdlib/sqlite.dark | 47 + backend/tests/Tests/AlphaNormalize.Tests.fs | 127 +++ backend/tests/Tests/Builtin.Tests.fs | 6 + backend/tests/Tests/MultiInstance.Tests.fs | 958 ++++++++++++++++++ backend/tests/Tests/OpsProjections.Tests.fs | 546 ++++++++++ backend/tests/Tests/Releases.Tests.fs | 171 ++++ backend/tests/Tests/SyncE2E.Tests.fs | 431 ++++++++ backend/tests/Tests/SyncScenarios.Tests.fs | 377 +++++++ backend/tests/Tests/Tests.fs | 8 +- backend/tests/Tests/Tests.fsproj | 6 + 12 files changed, 2771 insertions(+), 1 deletion(-) create mode 100644 backend/testfiles/execution/cli/sync-per-branch.dark create mode 100644 backend/testfiles/execution/stdlib/eventlog.dark create mode 100644 backend/testfiles/execution/stdlib/sqlite.dark create mode 100644 backend/tests/Tests/AlphaNormalize.Tests.fs create mode 100644 backend/tests/Tests/MultiInstance.Tests.fs create mode 100644 backend/tests/Tests/OpsProjections.Tests.fs create mode 100644 backend/tests/Tests/Releases.Tests.fs create mode 100644 backend/tests/Tests/SyncE2E.Tests.fs create mode 100644 backend/tests/Tests/SyncScenarios.Tests.fs diff --git a/backend/testfiles/execution/cli/sync-per-branch.dark b/backend/testfiles/execution/cli/sync-per-branch.dark new file mode 100644 index 0000000000..db491c49a0 --- /dev/null +++ b/backend/testfiles/execution/cli/sync-per-branch.dark @@ -0,0 +1,85 @@ +// Sync unit tests (pure + db-backed, no HTTP): the blob channel builtins and the adaptive daemon interval. +// Cross-instance convergence over the real wire is covered by MultiInstance/SyncScenarios/SyncE2E. +// (Per-branch controls — follow/private — were removed; sync is wholesale, so their filters are gone.) + +// ── receive robustness: a malformed wire op is SKIPPED, never a crash ────────────────────────────────── +// The append path parses each event and drops any it can't (bad hex op / bad uuid) — "a bad peer skips, not +// crashes". A batch of only-garbage folds nothing and returns 0, totally, rather than throwing. +module AppendSkipsMalformedOp = + (Stdlib.EventLog.append + [] + [ Stdlib.EventLog.Event + { id = "00000000-0000-0000-0000-000000000001" + op = "zznothexatall" + branchId = "89282547-e4e6-4986-bcb6-db74bc6a8c0f" + commitHash = "deadbeef" + originTs = "2026-07-08T00:00:00.000Z" } ]) = 0 + +// ── blob channel (fetch-on-miss over the sync builtins; content-addressed, real SHA-256 hashes) ──────── +// Hashes are the SHA-256 of the decoded bytes: "aGVsbG8=" = "hello", "d29ybGQ=" = "world". syncBlobInsert +// VERIFIES bytes hash to the claimed hash (rejects a poisoned/mismatched blob), so the tests use real hashes. + +// syncBlobInsert stores a blob (base64-decoded, hash-verified); syncBlobBytes reads it back, base64. +module BlobRoundtrip = + (let h = "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824" + let _ = Builtin.syncBlobInsert h "aGVsbG8=" + Builtin.syncBlobBytes h) = "aGVsbG8=" + +// A mismatched hash (bytes don't hash to it) is REJECTED — nothing stored, returns false. +module BlobInsertRejectsMismatch = + (Builtin.syncBlobInsert "0000000000000000000000000000000000000000000000000000000000000000" "aGVsbG8=") = false + +// syncBlobMissing returns a hash we DON'T hold (the ones to fetch). +module BlobMissingAbsent = + (Builtin.syncBlobMissing [ "testblob-absent-zzz999" ]) = [ "testblob-absent-zzz999" ] + +// …and nothing for a hash we DO hold. +module BlobMissingPresent = + (let h = "486ea46224d1bb4fb680f34f7c9ad96a8f24ec88be73ea8e5a6c65260e9cb8a7" + let _ = Builtin.syncBlobInsert h "d29ybGQ=" + Builtin.syncBlobMissing [ h ]) = [] + +// ── adaptive daemon interval (pure nextPollMs) ───────────────────────────────────────────────────────── + +// After a pull that saw changes, snap to the responsive floor (2s). +module NextPollSnapsToFloor = + (Darklang.Sync.nextPollMs true 8000 30000) = 2000 + +// While idle, back off by doubling. +module NextPollDoublesIdle = + (Darklang.Sync.nextPollMs false 8000 30000) = 16000 + +// …capped at the configured ceiling. +module NextPollCapsAtCeiling = + (Darklang.Sync.nextPollMs false 20000 30000) = 30000 + +// ── daemon config validation (S8): a bad value is REJECTED (None), not stored as junk that reverts ───────── +module ConfigRejectsBadPort = + (Darklang.Cli.Sync.daemonConfigValue "port" "abc") = Stdlib.Option.Option.None + +module ConfigRejectsPortOutOfRange = + (Darklang.Cli.Sync.daemonConfigValue "port" "0") = Stdlib.Option.Option.None + +module ConfigAcceptsPort = + (Darklang.Cli.Sync.daemonConfigValue "port" "9000") = Stdlib.Option.Option.Some( + ("apps.sync-server.port", "9000") + ) + +module ConfigRejectsBadMode = + (Darklang.Cli.Sync.daemonConfigValue "mode" "bogus") = Stdlib.Option.Option.None + +module ConfigAcceptsMode = + (Darklang.Cli.Sync.daemonConfigValue "mode" "pull-only") = Stdlib.Option.Option.Some( + ("sync.daemon.mode", "pull-only") + ) + +module ConfigRejectsOnBootTypo = + (Darklang.Cli.Sync.daemonConfigValue "on-boot" "false") = Stdlib.Option.Option.None + +module ConfigRejectsZeroInterval = + (Darklang.Cli.Sync.daemonConfigValue "interval" "0") = Stdlib.Option.Option.None + +module ConfigAcceptsInterval = + (Darklang.Cli.Sync.daemonConfigValue "interval" "30") = Stdlib.Option.Option.Some( + ("apps.sync.intervalMs", "30000") + ) diff --git a/backend/testfiles/execution/stdlib/eventlog.dark b/backend/testfiles/execution/stdlib/eventlog.dark new file mode 100644 index 0000000000..489ef1d8a2 --- /dev/null +++ b/backend/testfiles/execution/stdlib/eventlog.dark @@ -0,0 +1,10 @@ +// The native op-log read API (`Stdlib.EventLog`) that sync reads from. Reading past the end of the log +// leaves the cursor unchanged — the "already current" shape a peer serves a caught-up puller. The full +// readSince→append→converge path (origin_ts preservation + fold) is covered in the F# suite +// (OpsProjections.Tests); this pins the Dark-side read contract. + +module EventLog = + ((Stdlib.EventLog.readSince + (Stdlib.EventLog.cursorFromInt 999999999L) + 500L) + |> (fun b -> Stdlib.EventLog.cursorToInt b.next)) = 999999999L diff --git a/backend/testfiles/execution/stdlib/sqlite.dark b/backend/testfiles/execution/stdlib/sqlite.dark new file mode 100644 index 0000000000..c97c3d818a --- /dev/null +++ b/backend/testfiles/execution/stdlib/sqlite.dark @@ -0,0 +1,47 @@ +// CRUD over Stdlib.Sqlite (raw exec/execP/query floor + the column/scalarInt/scalarIntP/queryOneP/textField/ +// intField convenience layer), incl. injection-safe params (a quote round-trips). Each assertion keeps its +// READ in the body (final) position: a read bound to a `let` is forced where it's *used*, so a write between +// the read and its use (e.g. a cleanup DROP) would make it see the later state. So: writes first, read last. +// Distinct temp db per assertion (SQLite creates on open) → isolated under the parallel testfile run. + +// CREATE + READ — a column of text, with a quoted value inserted via params. +module CreateRead = + (let db = "/tmp/dark-test-sqlite-a.db" + let _ = Stdlib.Sqlite.exec db "DROP TABLE IF EXISTS t" + let _ = Stdlib.Sqlite.exec db "CREATE TABLE t (id INTEGER PRIMARY KEY, name TEXT)" + let _ = Stdlib.Sqlite.execP db "INSERT INTO t (id, name) VALUES (@p0, @p1)" [ "1"; "o'brien" ] + let _ = Stdlib.Sqlite.execP db "INSERT INTO t (id, name) VALUES (@p0, @p1)" [ "2"; "bob" ] + Stdlib.Sqlite.column db "SELECT name FROM t ORDER BY id" "name") = [ "o'brien"; "bob" ] + +// UPDATE + DELETE — final state after renaming id=1 and removing id=2 is just ["updated"]. +module UpdateDelete = + (let db = "/tmp/dark-test-sqlite-b.db" + let _ = Stdlib.Sqlite.exec db "DROP TABLE IF EXISTS t" + let _ = Stdlib.Sqlite.exec db "CREATE TABLE t (id INTEGER PRIMARY KEY, name TEXT)" + let _ = Stdlib.Sqlite.execP db "INSERT INTO t (id, name) VALUES (@p0, @p1)" [ "1"; "o'brien" ] + let _ = Stdlib.Sqlite.execP db "INSERT INTO t (id, name) VALUES (@p0, @p1)" [ "2"; "bob" ] + let _ = Stdlib.Sqlite.execP db "UPDATE t SET name = @p0 WHERE id = @p1" [ "updated"; "1" ] + let _ = Stdlib.Sqlite.execP db "DELETE FROM t WHERE id = @p0" [ "2" ] + Stdlib.Sqlite.column db "SELECT name FROM t ORDER BY id" "name") = [ "updated" ] + +// scalarInt (count) + scalarIntP (per-key lookup), read as a body tuple. +module Scalars = + (let db = "/tmp/dark-test-sqlite-c.db" + let _ = Stdlib.Sqlite.exec db "DROP TABLE IF EXISTS t" + let _ = Stdlib.Sqlite.exec db "CREATE TABLE t (id INTEGER PRIMARY KEY, name TEXT)" + let _ = Stdlib.Sqlite.execP db "INSERT INTO t (id, name) VALUES (@p0, @p1)" [ "1"; "alice" ] + let _ = Stdlib.Sqlite.execP db "INSERT INTO t (id, name) VALUES (@p0, @p1)" [ "2"; "bob" ] + ((Stdlib.Sqlite.scalarInt db "SELECT count(*) AS n FROM t" "n") |> Stdlib.Option.withDefault 0L, + (Stdlib.Sqlite.scalarIntP db "SELECT id FROM t WHERE name = @p0" [ "bob" ] "id") |> Stdlib.Option.withDefault 0L)) + = (2L, 2L) + +// queryOneP + textField + intField, read in the body via an inline match. +module Row = + (let db = "/tmp/dark-test-sqlite-d.db" + let _ = Stdlib.Sqlite.exec db "DROP TABLE IF EXISTS t" + let _ = Stdlib.Sqlite.exec db "CREATE TABLE t (id INTEGER PRIMARY KEY, name TEXT)" + let _ = Stdlib.Sqlite.execP db "INSERT INTO t (id, name) VALUES (@p0, @p1)" [ "2"; "bob" ] + match Stdlib.Sqlite.queryOneP db "SELECT id, name FROM t WHERE id = @p0" [ "2" ] with + | Some r -> (Stdlib.Sqlite.textField r "name", Stdlib.Sqlite.intField r "id") + | None -> (Stdlib.Option.Option.None, Stdlib.Option.Option.None)) + = (Stdlib.Option.Option.Some "bob", Stdlib.Option.Option.Some 2L) diff --git a/backend/tests/Tests/AlphaNormalize.Tests.fs b/backend/tests/Tests/AlphaNormalize.Tests.fs new file mode 100644 index 0000000000..5da634709f --- /dev/null +++ b/backend/tests/Tests/AlphaNormalize.Tests.fs @@ -0,0 +1,127 @@ +/// Proves meaning-stable hashing: after alpha-normalization, a package item's content hash depends on +/// its MEANING, not on incidental bound-variable names. Two items identical up to renaming of +/// parameters / `let` / lambda / match binders hash IDENTICALLY; items that differ in meaning (which +/// variable is used, binder order, a free variable) still hash DIFFERENTLY. +/// +/// Everything is compared through `computeFnHash` (which skips ids), since two freshly-built exprs have +/// different ids and so can't be compared structurally with `=`. +module Tests.AlphaNormalize + +open Expecto +open Prelude + +open TestUtils.TestUtils +open TestUtils.PTShortcuts + +module PT = LibExecution.ProgramTypes +open LibSerialization.Hashing + + + +// ── helpers: a fn with the given parameter names + body; its raw vs alpha-normalized hash ── + +let private fnOf + (paramNames : List) + (body : PT.Expr) + : PT.PackageFn.PackageFn = + let ps = + match paramNames with + | [] -> NEList.singleton "unused" + | h :: t -> NEList.ofList h t + testPackageFn [] ps PT.TInt64 body + +// the LIVE content hash — `computeFnHash` alpha-normalizes internally, so this *is* the +// meaning-stable hash. (`normalizeFn` stays public + idempotent; the last test pins that directly.) +let private h (paramNames : List) (body : PT.Expr) : PT.Hash = + Hashing.computeFnHash Hashing.Normal (fnOf paramNames body) + +let private mpVar (name : string) : PT.MatchPattern = PT.MPVariable(gid (), name) + +let private caseOf (pat : PT.MatchPattern) (rhs : PT.Expr) : PT.MatchCase = + { pat = pat; whenCondition = None; rhs = rhs } + + +let tests = + testList + "AlphaNormalize" + [ test + "parameter names don't affect the hash (a parameter use is positional, EArg)" { + // the body references parameters by position (EArg index), and the parameter name isn't hashed, + // so two fns identical up to parameter names share one content hash. (Meaning-preservation — + // which parameter goes where — is pinned by the next test and the let/lambda/match tests below.) + let body = eTuple (eArg 0) (eArg 1) [] // (param0, param1) — positional + Expect.equal + (h [ "x"; "y" ] body) + (h [ "a"; "b" ] body) + "same meaning, same hash — the function's identity ignores incidental parameter names" + } + + test "parameter POSITION is meaning: `(arg0, arg1)` ≠ `(arg1, arg0)`" { + Expect.notEqual + (h [ "x"; "y" ] (eTuple (eArg 0) (eArg 1) [])) + (h [ "x"; "y" ] (eTuple (eArg 1) (eArg 0) [])) + "which parameter goes where is meaning — the positional reference keeps it" + } + + test "let binder rename: `let x = 1 in x` ≡ `let y = 1 in y`" { + let lx = eLet (lpVar "x") (eInt64 1L) (eVar "x") + let ly = eLet (lpVar "y") (eInt64 1L) (eVar "y") + Expect.equal (h [] lx) (h [] ly) "same meaning, same hash" + } + + test "lambda binder rename: `fun x -> x` ≡ `fun y -> y`" { + let lx = eLambda (gid ()) [ lpVar "x" ] (eVar "x") + let ly = eLambda (gid ()) [ lpVar "y" ] (eVar "y") + Expect.equal (h [] lx) (h [] ly) "alpha-equivalent lambdas hash equal" + } + + test "lambda meaning preserved: `fun x y -> x` ≠ `fun x y -> y`" { + let first = eLambda (gid ()) [ lpVar "x"; lpVar "y" ] (eVar "x") + let second = eLambda (gid ()) [ lpVar "x"; lpVar "y" ] (eVar "y") + Expect.notEqual + (h [] first) + (h [] second) + "returning the first vs the second argument is a real difference" + } + + test "match binder rename: `match 0 with | x -> x` ≡ `| y -> y`" { + let mx = eMatch (eInt64 0L) [ caseOf (mpVar "x") (eVar "x") ] + let my = eMatch (eInt64 0L) [ caseOf (mpVar "y") (eVar "y") ] + Expect.equal (h [] mx) (h [] my) "alpha-equivalent match cases hash equal" + } + + test + "free variables are preserved (a free var is a real reference, not a binder)" { + // `z` / `w` are neither parameters nor locally bound — they must survive normalization distinctly + Expect.notEqual + (h [] (eVar "z")) + (h [] (eVar "w")) + "two different free variables stay different after normalization" + } + + test "shadowing: inner-use ≢ outer-use; and inner-use is alpha-stable" { + // let _ = 1 in let _ = 2 in + let useInnerXY = + eLet (lpVar "x") (eInt64 1L) (eLet (lpVar "y") (eInt64 2L) (eVar "y")) + let useInnerAB = + eLet (lpVar "a") (eInt64 1L) (eLet (lpVar "b") (eInt64 2L) (eVar "b")) + let useOuter = + eLet (lpVar "a") (eInt64 1L) (eLet (lpVar "b") (eInt64 2L) (eVar "a")) + Expect.equal + (h [] useInnerXY) + (h [] useInnerAB) + "using the inner binding is alpha-stable across renames" + Expect.notEqual + (h [] useInnerAB) + (h [] useOuter) + "using the inner vs the outer binding is a real difference (shadowing respected)" + } + + test + "normalization is idempotent (normalizing an already-normalized fn is a no-op)" { + let f = fnOf [ "x"; "y" ] (eTuple (eVar "y") (eVar "x") []) + Expect.equal + (Hashing.computeFnHash Hashing.Normal (normalizeFn (normalizeFn f))) + (Hashing.computeFnHash Hashing.Normal (normalizeFn f)) + "normalizeFn (normalizeFn f) hashes the same as normalizeFn f" + } ] diff --git a/backend/tests/Tests/Builtin.Tests.fs b/backend/tests/Tests/Builtin.Tests.fs index 85a24c444a..c6b82d8c31 100644 --- a/backend/tests/Tests/Builtin.Tests.fs +++ b/backend/tests/Tests/Builtin.Tests.fs @@ -169,6 +169,12 @@ let private multiUseAllowlist : Set = // LSP, and CLI-script parsing. "parserParseToWrittenTypes" + // Sync / event-log seam — infra builtins used across the sync surface. + // localDbPath: the local store path (EventLog.readSince, sync.dark, server.dark, version.dark). + // currentRelease: the Release coordinate (version display + sync's version-skew handshake). + "currentRelease" + "localDbPath" + // Misc. "interpreterStatsReset" ] diff --git a/backend/tests/Tests/MultiInstance.Tests.fs b/backend/tests/Tests/MultiInstance.Tests.fs new file mode 100644 index 0000000000..5f54a48859 --- /dev/null +++ b/backend/tests/Tests/MultiInstance.Tests.fs @@ -0,0 +1,958 @@ +/// A tight, general-purpose harness for spinning up FRESH, ISOLATED Darklang instances in-process — each +/// instance is its own store. Two flavours: +/// freshInstance — an empty store (schema only; `main` from schema.sql). For structure-level tests. +/// seededInstance — a COPY of a ready-to-go baseline store (the full package seed), so a test that needs +/// real functions/types/values (most CLI experiences) is cheap: the baseline is snapshotted +/// once, then each instance is a fast file-copy of it. +/// Switch the active store with `activate`, sync the wire between instances via the real receive path, and +/// assert they converge. Spinning up an instance is a couple of lines: +/// let! a = seededInstance "a" +/// let! b = seededInstance "b" +/// +/// `testSequenced` + a `finally` that always restores the default store, so swapping the process-global +/// connection can't disturb the parallel store tests (they've completed by the sequenced phase; and we hand +/// the default store back no matter what). The swap lives behind `Sql.useStoreForTesting` (test-only). +module Tests.MultiInstance + +open Expecto + +open System.Threading.Tasks +open FSharp.Control.Tasks + +open Prelude +open Fumble +open LibDB.Sqlite + +module Seed = LibDB.Seed +module Inserts = LibDB.Inserts +module Resolutions = LibDB.Resolutions +module Account = LibCloud.Account +module PT = LibExecution.ProgramTypes +module BS = LibSerialization.Binary.Serialization +module Hashing = LibSerialization.Hashing.Hashing +module File = LibCloud.File +module Config = LibCloud.Config +module RT = LibExecution.RuntimeTypes +module PT2RT = LibExecution.ProgramTypesToRuntimeTypes +module Exe = LibExecution.Execution +module Dval = LibExecution.Dval + +// ── the fresh-instance harness ────────────────────────────────────────────────────────────────────── + +type Instance = { name : string; path : string } + +let private schemaSql = lazy (File.readfile Config.Migrations "schema.sql") + +let private deleteStore (path : string) : unit = + for suffix in [ ""; "-wal"; "-shm" ] do + try + System.IO.File.Delete(path + suffix) + with _ -> + () + +/// Copy a SQLite store + its WAL/SHM sidecars (so the copy is a consistent snapshot on open). +let private copyStore (src : string) (dst : string) : unit = + deleteStore dst + for suffix in [ ""; "-wal"; "-shm" ] do + if System.IO.File.Exists(src + suffix) then + System.IO.File.Copy(src + suffix, dst + suffix, overwrite = true) + +let private tmpPath (name : string) : string = + $"/tmp/dark-test-instance-{name}-{System.Guid.NewGuid()}.db" + +/// Snapshotted ONCE: a baseline of the seeded default store, so `seededInstance` is a cheap local copy. +/// Captured lazily during the sequenced phase, when no parallel test is writing the default store. +let private baselineSeed : Lazy = + lazy + (let template = "/tmp/dark-test-seed-baseline.db" + copyStore LibConfig.Config.dbPath template + template) + +/// A fresh, EMPTY, isolated instance (schema only; `main` from schema.sql), made the active store. +let freshInstance (name : string) : Task = + task { + let path = tmpPath name + deleteStore path + Sql.useStoreForTesting path + Sql.query (schemaSql.Force()) |> Sql.executeStatementSync + return { name = name; path = path } + } + +/// A fresh isolated instance that is a COPY of the seeded baseline (full package seed), made the active store. +let seededInstance (name : string) : Task = + task { + let path = tmpPath name + copyStore (baselineSeed.Force()) path + Sql.useStoreForTesting path + return { name = name; path = path } + } + +let activate (inst : Instance) : unit = Sql.useStoreForTesting inst.path + +let teardown (insts : List) : unit = + Sql.resetStoreForTesting () + insts |> List.iter (fun i -> deleteStore i.path) + +// ── helpers (build wire events, inspect projections, convert the JSON-ish wire) ─────────────────────── + +let private branchEventAt + (op : PT.BranchOp) + (originTs : string) + : string * byte[] * string = + let (PT.Hash h) = Hashing.computeBranchOpHash op + (h, BS.PT.BranchOp.serialize h op, originTs) + +let private branchEvent (op : PT.BranchOp) : string * byte[] * string = + branchEventAt op "2026-07-08T00:00:00.000Z" + +/// A SetName package-op event, exactly as it crosses the wire / arrives at `receiveOps`. +let private setNameEvent + (loc : PT.PackageLocation) + (fnHash : string) + (commitHash : string) + (ts : string) + : System.Guid * byte[] * System.Guid * string * string = + let op = PT.PackageOp.SetName(loc, PT.Reference.PackageFn(PT.Hash fnHash)) + let opId = Inserts.computeOpHash op + (opId, BS.PT.PackageOp.serialize opId op, PT.mainBranchId, commitHash, ts) + +/// A Deprecate package-op event marking a real seeded fn Obsolete — as it crosses the wire / arrives at +/// `receiveOps`. Folds into the `deprecations` projection (a non-SetName op kind). +let private deprecateEvent + (fnHash : string) + (commitHash : string) + (ts : string) + : System.Guid * byte[] * System.Guid * string * string = + let target = PT.Reference.fromHashAndKind (PT.Hash fnHash, PT.ItemKind.Fn) + let op = + PT.PackageOp.Deprecate(target, PT.DeprecationKind.Obsolete, "obsolete (test)") + let opId = Inserts.computeOpHash op + (opId, BS.PT.PackageOp.serialize opId op, PT.mainBranchId, commitHash, ts) + +/// A seeded function hash that is NOT already deprecated — so a deprecation test starts from a clean slate. +let private undeprecatedFunctionHash () : Task = + Sql.query + "SELECT hash FROM package_functions WHERE hash NOT IN (SELECT item_hash FROM deprecations) LIMIT 1" + |> Sql.executeRowAsync (fun read -> read.string "hash") + +/// An existing commit hash from the seed. Sync ops reference commits that already exist (commits travel in the +/// wire alongside their ops), so a test references a real seed commit rather than minting accounts + commits. +let private existingCommit () : Task = + Sql.query "SELECT hash FROM commits LIMIT 1" + |> Sql.executeRowAsync (fun read -> read.string "hash") + +/// The active instance's branch-op-log high-water mark (so a `branchOpsSince` returns only NEW branch ops). +let private currentBranchCursor () : Task = + Sql.query "SELECT COALESCE(MAX(rowid), 0) AS c FROM branch_ops" + |> Sql.executeRowAsync (fun read -> read.int64 "c") + +let private branchNames () : Task> = + Sql.query "SELECT name FROM branches ORDER BY name" + |> Sql.executeAsync (fun read -> read.string "name") + +let private liveHash (loc : PT.PackageLocation) : Task> = + Sql.query + "SELECT item_hash FROM locations WHERE owner = @o AND modules = @m AND name = @n AND unlisted_at IS NULL" + |> Sql.parameters + [ "o", Sql.string loc.owner + "m", Sql.string (String.concat "." loc.modules) + "n", Sql.string loc.name ] + |> Sql.executeAsync (fun read -> read.string "item_hash") + +/// Two distinct real function hashes from the seed (both instances share the seed, so a hash on A exists on B). +let private twoFunctionHashes () : Task = + task { + let! hs = + Sql.query "SELECT hash FROM package_functions LIMIT 2" + |> Sql.executeAsync (fun read -> read.string "hash") + match hs with + | a :: b :: _ -> return (a, b) + | _ -> return Exception.raiseInternal "seed needs >= 2 functions" [] + } + +/// The active instance's current op-log high-water mark, so a later `eventsSince` returns only NEW ops +/// (not the whole seed). +let private currentCursor () : Task = + Sql.query "SELECT COALESCE(MAX(rowid), 0) AS c FROM package_ops" + |> Sql.executeRowAsync (fun read -> read.int64 "c") + +/// The count of unreviewed conflicts recorded on the active instance. +let private conflictCount () : Task = + Sql.query "SELECT COUNT(*) AS n FROM sync_conflicts" + |> Sql.executeRowAsync (fun read -> read.int64 "n") + +/// Conflicts recorded for ONE location — so a test asserts on its OWN divergence (an exact count), not a +/// global tally that any baseline/other-test conflict would satisfy. +let private conflictCountAt (location : string) : Task = + Sql.query "SELECT COUNT(*) AS n FROM sync_conflicts WHERE location = @loc" + |> Sql.parameters [ "loc", Sql.string location ] + |> Sql.executeRowAsync (fun read -> read.int64 "n") + +let private wireEvent + ((id, hex, br, ch, ts) : string * string * string * string * string) + : System.Guid * byte[] * System.Guid * string * string = + (System.Guid.Parse id, + System.Convert.FromHexString hex, + System.Guid.Parse br, + ch, + ts) + +let private wireCommit + ((h, msg, br, acct, at) : string * string * string * string * string) + : string * string * System.Guid * System.Guid * string = + (h, msg, System.Guid.Parse br, System.Guid.Parse acct, at) + +/// Read the active instance's NEW package ops since `cursor` as a wire batch, ready to feed another +/// instance's `receiveOps` (this is the real serialize→wire→deserialize round-trip sync does). +let private wireSince + (cursor : int64) + : Task * + List> + = + task { + let! (commitsW, eventsW, _) = Seed.eventsSince cursor 100000L + return (List.map wireCommit commitsW, List.map wireEvent eventsW) + } + +// ── tests ───────────────────────────────────────────────────────────────────────────────────────────── + +// ── in-process CLI driver ───────────────────────────────────────────────────────────────────────────── +// Drive the REAL `dark ` dispatch (the `executeCliCommand` package fn) in-process against whatever +// store is currently active, capturing its stdout. This is the same seam `CliTraces.Tests.fs` uses — no +// subprocess fork, so it's fast enough for the normal suite, yet it exercises the true CLI code path +// (dispatch, rendering, Builtins) end to end. Combined with `seededInstance`/`activate`, a test can build a +// real store state (e.g. a recorded conflict) and assert on what the user would actually see. + +let private buildCliState () : Task = + task { + let builtins = Builtins.CliHost.Libs.Cli.builtinsToUse () + let pmRT = PT2RT.PackageManager.toRT builtins.values LibDB.PackageManager.pt + let program : RT.Program = { dbs = Map.empty } + let notify _ _ _ _ = uply { return () } + let sendException _ _ _ _ = uply { return () } + return + Exe.createState + builtins + pmRT + Exe.noTracing + sendException + notify + PT.mainBranchId + program + } + +/// Invoke `dark ` in-process against the active store; return trimmed stdout. Redirects `Console.Out` +/// for the duration (the surrounding `testSequenced` keeps the process-global `SetOut` from racing). +let private runCli (state : RT.ExecutionState) (args : string list) : Task = + task { + let argsDval = args |> List.map RT.DString |> Dval.list RT.KTString + let fnName = + RT.FQFnName.fqPackage (LibExecution.PackageRefs.Fn.Cli.executeCliCommand ()) + NonBlockingConsole.wait () + let captured = new System.IO.StringWriter() + let originalOut = System.Console.Out + try + System.Console.SetOut(captured) + let! result = Exe.executeFunction state fnName [] (NEList.singleton argsDval) + // `Stdlib.printLine` queues to a background thread; drain before reading. + NonBlockingConsole.wait () + match result with + | Ok _ -> return captured.ToString().Trim() + | Error(rte, _) -> + System.Console.SetOut(originalOut) + return Tests.failtestf "runCli %A errored: %A" args rte + finally + System.Console.SetOut(originalOut) + } + +let tests = + testSequenced + <| testList + "MultiInstance" + [ testTask + "fresh instances are isolated stores, and branch structure syncs across the wire" { + let mutable insts : List = [] + + try + let! a = freshInstance "a" + insts <- [ a ] + let! b = freshInstance "b" + insts <- [ a; b ] + + activate a + let create = + PT.BranchOp.CreateBranch( + System.Guid.NewGuid(), + "feature", + Some PT.mainBranchId, + None + ) + let! _ = Seed.receiveBranchOps [ branchEvent create ] + let! aBranches = branchNames () + + activate b + let! bBefore = branchNames () + + activate a + let! (wire, _cursor) = Seed.branchOpsSince 0L 1000L + + activate b + let! _ = + Seed.receiveBranchOps ( + wire + |> List.map (fun ((id, hex, ts) : string * string * string) -> + (id, System.Convert.FromHexString hex, ts)) + ) + let! bAfter = branchNames () + + Expect.equal aBranches [ "feature"; "main" ] "A has both branches" + Expect.equal bBefore [ "main" ] "B is isolated: only main before sync" + Expect.equal + bAfter + [ "feature"; "main" ] + "B converged: feature arrived over the wire" + finally + teardown insts + } + + testTask + "branch identity is GLOBAL: a synced branch keeps the SAME id + name (never re-minted / instance-scoped)" { + // Stachu's invariant: a branch `whatever` is the same `whatever` on every instance you sync — same id + // and name, never labeled by which instance/peer/account it came from. Wholesale branch-op sync must + // carry the branch's identity verbatim, not re-mint it on the receiver. + let mutable insts : List = [] + try + let! a = freshInstance "a" + insts <- [ a ] + let! b = freshInstance "b" + insts <- [ a; b ] + let branchId = System.Guid.NewGuid() + activate a + let create = + PT.BranchOp.CreateBranch(branchId, "shared", Some PT.mainBranchId, None) + let! _ = Seed.receiveBranchOps [ branchEvent create ] + let! (wire, _) = Seed.branchOpsSince 0L 1000L + activate b + let! _ = + Seed.receiveBranchOps ( + wire + |> List.map (fun ((id, hex, ts) : string * string * string) -> + (id, System.Convert.FromHexString hex, ts)) + ) + let idByName (name : string) : Task> = + Sql.query "SELECT id FROM branches WHERE name = @n" + |> Sql.parameters [ "n", Sql.string name ] + |> Sql.executeRowOptionAsync (fun read -> read.string "id") + let! bId = idByName "shared" + Expect.equal + bId + (Some(string branchId)) + "B's `shared` branch has the SAME id A minted — branch identity is global, not per-instance" + finally + teardown insts + } + + testTask + "a fresh schema-only store runs the sync path (the composite-PK upsert folds a package op)" { + let mutable insts : List = [] + + try + let! a = freshInstance "a" + insts <- [ a ] + + // A fresh store built from schema.sql alone must run receiveOps — whose ON CONFLICT(id, branch_id) + // upsert needs the composite PK to be IN schema.sql (not only in an incremental migration). This + // guards against schema.sql drifting from the migrated production schema. + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "Fresh" ]; name = "x" } + let fnHash = + "00000000000000000000000000000000000000000000000000000000deadbeef" + let commitHash = "fresh-" + string (System.Guid.NewGuid()) + let ts = "2026-07-08T00:00:00.000Z" + let commit = + (commitHash, "author x", PT.mainBranchId, Account.IDs.darklang, ts) + + let! _ = + Seed.receiveOps [ commit ] [ setNameEvent loc fnHash commitHash ts ] + let! bound = liveHash loc + + Expect.equal + bound + [ fnHash ] + "the package op folded on the fresh schema-built store" + finally + teardown insts + } + + testTask + "package convergence: a rename authored on A folds identically on B via the wire" { + let mutable insts : List = [] + + try + let! a = seededInstance "a" + insts <- [ a ] + let! b = seededInstance "b" + insts <- [ a; b ] + + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "Conv" ]; name = "greeting" } + let ts = "2026-07-08T12:00:00.000Z" + + // Author on A: bind a fresh name to a real seeded function, on a new commit. + activate a + let! (fnHash, _) = twoFunctionHashes () + let! commitHash = existingCommit () + let! cursorBefore = currentCursor () + let! _ = Seed.receiveOps [] [ setNameEvent loc fnHash commitHash ts ] + let! aHash = liveHash loc + let! (commits, events) = wireSince cursorBefore + + // Apply A's wire on B. + activate b + let! bBefore = liveHash loc + let! _ = Seed.receiveOps commits events + let! bHash = liveHash loc + + Expect.equal aHash [ fnHash ] "A bound the name" + Expect.equal + bBefore + [] + "B didn't have the binding before sync (isolated seed)" + Expect.equal bHash [ fnHash ] "B converged to A's binding via the wire" + finally + teardown insts + } + + testTask + "deprecation converges: a Deprecate authored on A folds into `deprecations` on B via the wire" { + // Coverage for a NON-SetName op kind end to end — the `deprecations` projection (new this PR) folds + + // syncs like locations do. Proves the fold/wire path isn't SetName-specific. + let mutable insts : List = [] + try + let! a = seededInstance "a" + insts <- [ a ] + let! b = seededInstance "b" + insts <- [ a; b ] + activate a + let! fnHash = undeprecatedFunctionHash () + let! commit = existingCommit () + let! cursorBefore = currentCursor () + let deprecatedCount () : Task = + Sql.query + "SELECT COUNT(*) AS n FROM deprecations WHERE item_hash = @h AND state = 'deprecated' AND unlisted_at IS NULL" + |> Sql.parameters [ "h", Sql.string fnHash ] + |> Sql.executeRowAsync (fun read -> read.int64 "n") + let! _ = + Seed.receiveOps + [] + [ deprecateEvent fnHash commit "2026-07-08T12:00:00.000Z" ] + let! aDep = deprecatedCount () + let! (commits, events) = wireSince cursorBefore + activate b + let! bBefore = deprecatedCount () + let! _ = Seed.receiveOps commits events + let! bAfter = deprecatedCount () + Expect.isGreaterThan + aDep + 0L + "A folded the Deprecate op into the deprecations projection" + Expect.equal + bBefore + 0L + "B didn't have the deprecation before sync (isolated seed)" + Expect.isGreaterThan + bAfter + 0L + "B converged: the deprecation arrived + folded via the wire" + finally + teardown insts + } + + testTask + "cross-store conflict: concurrent binds to one name converge (LWW) + record a conflict" { + let mutable insts : List = [] + + try + let! a = seededInstance "a" + insts <- [ a ] + let! b = seededInstance "b" + insts <- [ a; b ] + + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "Conflict" ]; name = "dup" } + + // A binds loc → fnA at ts …100; B binds loc → fnB at ts …200 (later ⇒ the LWW winner). + activate a + let! (fnA, fnB) = twoFunctionHashes () + let! commit = existingCommit () + let! curA = currentCursor () + let! _ = + Seed.receiveOps + [] + [ setNameEvent loc fnA commit "2026-07-08T00:00:00.100Z" ] + let! (commitsA, eventsA) = wireSince curA + + activate b + let! curB = currentCursor () + let! _ = + Seed.receiveOps + [] + [ setNameEvent loc fnB commit "2026-07-08T00:00:00.200Z" ] + let! (commitsB, eventsB) = wireSince curB + + // Cross-sync: B receives A's op (divergence!), A receives B's op. + activate b + let! _ = Seed.receiveOps commitsA eventsA + let! bConflicts = conflictCountAt "Test.Conflict.dup" + let! bFinal = liveHash loc + + activate a + let! _ = Seed.receiveOps commitsB eventsB + let! aFinal = liveHash loc + + Expect.equal + bFinal + [ fnB ] + "B keeps the LWW winner (its own later bind) after receiving A's older op" + Expect.equal + aFinal + [ fnB ] + "A converges to the same LWW winner after receiving B's op" + Expect.equal + bConflicts + 1L + "B recorded exactly this divergence as a conflict (never silent)" + finally + teardown insts + } + + testTask + "bidirectional pull: A's and B's independent edits both land on the other" { + let mutable insts : List = [] + + try + let! a = seededInstance "a" + insts <- [ a ] + let! b = seededInstance "b" + insts <- [ a; b ] + + let locX : PT.PackageLocation = + { owner = "Test"; modules = [ "Bi" ]; name = "x" } + let locY : PT.PackageLocation = + { owner = "Test"; modules = [ "Bi" ]; name = "y" } + let ts = "2026-07-08T12:00:00.000Z" + + activate a + let! (fnA, fnB) = twoFunctionHashes () + let! commit = existingCommit () + let! curA = currentCursor () + let! _ = Seed.receiveOps [] [ setNameEvent locX fnA commit ts ] + let! (cA, eA) = wireSince curA + + activate b + let! curB = currentCursor () + let! _ = Seed.receiveOps [] [ setNameEvent locY fnB commit ts ] + let! (cB, eB) = wireSince curB + + // Sync both directions. + activate b + let! _ = Seed.receiveOps cA eA + let! bx = liveHash locX + let! by = liveHash locY + + activate a + let! _ = Seed.receiveOps cB eB + let! ax = liveHash locX + let! ay = liveHash locY + + Expect.equal ax [ fnA ] "A keeps its own X" + Expect.equal ay [ fnB ] "A gains B's Y" + Expect.equal bx [ fnA ] "B gains A's X" + Expect.equal by [ fnB ] "B keeps its own Y" + finally + teardown insts + } + + testTask + "pagination: eventsSince returns bounded, disjoint batches with an advancing cursor" { + let mutable insts : List = [] + + try + let! a = seededInstance "a" + insts <- [ a ] + + activate a + let! (fnA, _) = twoFunctionHashes () + let! commit = existingCommit () + let! cur0 = currentCursor () + + for i in [ 1; 2; 3 ] do + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "Page" ]; name = $"n{i}" } + let! _ = + Seed.receiveOps + [] + [ setNameEvent loc fnA commit $"2026-07-08T00:00:0{i}.000Z" ] + () + + let! (_, batch1, c1) = Seed.eventsSince cur0 2L + let! (_, batch2, c2) = Seed.eventsSince c1 2L + + Expect.equal (List.length batch1) 2 "first batch is bounded to the limit" + Expect.equal + (List.length batch2) + 1 + "second batch has exactly the remaining op" + Expect.isGreaterThan c1 cur0 "cursor advanced past the first batch" + Expect.isGreaterThan c2 c1 "cursor advanced again" + finally + teardown insts + } + + testTask + "resolution converges: a keep-mine override propagates and the other instance adopts it" { + let mutable insts : List = [] + + try + let! a = seededInstance "a" + insts <- [ a ] + let! b = seededInstance "b" + insts <- [ a; b ] + + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "Res" ]; name = "pick" } + + // A and B concurrently bind loc; the later stamp (fnB) is the LWW winner on both after cross-sync. + activate a + let! (fnA, fnB) = twoFunctionHashes () + let! commit = existingCommit () + let! curA = currentCursor () + let! _ = + Seed.receiveOps + [] + [ setNameEvent loc fnA commit "2026-07-08T00:00:00.100Z" ] + let! (cA, eA) = wireSince curA + + activate b + let! curB = currentCursor () + let! _ = + Seed.receiveOps + [] + [ setNameEvent loc fnB commit "2026-07-08T00:00:00.200Z" ] + let! (cB, eB) = wireSince curB + + activate b + let! _ = Seed.receiveOps cA eA + activate a + let! _ = Seed.receiveOps cB eB + + // A's human overrides back to fnA (a later `at` than either op) and it converges to B via the log. + activate a + let res = + Resolutions.mk + loc + (PT.Reference.PackageFn(PT.Hash fnA)) + "human" + PT.mainBranchId + "2026-07-08T00:00:00.300Z" + do! Resolutions.recordAndApply res + let! aResolved = liveHash loc + let! (resWire, _) = Resolutions.resolutionsSince 0L 1000L + + activate b + let! _ = Resolutions.receiveResolutions resWire + let! bResolved = liveHash loc + + Expect.equal + aResolved + [ fnA ] + "A's resolution overrode the LWW winner back to fnA" + Expect.equal + bResolved + [ fnA ] + "B adopted A's resolution via the synced resolutions log" + finally + teardown insts + } + + testTask + "resolution survives a projection rebuild — rebuildProjections re-applies the overlay" { + // Guards the S6 fix: a rebuild re-folds the op log (which would pick the LWW winner), so it MUST also + // re-apply the resolutions overlay or a human override is silently lost. "effective binding = fold → + // then apply resolutions." + let mutable insts : List = [] + try + let! a = seededInstance "a" + insts <- [ a ] + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "ResRebuild" ]; name = "pick" } + activate a + let! (fnA, fnB) = twoFunctionHashes () + let! commit = existingCommit () + // fnB is the LWW winner (ts .200 > .100); a human overrides back to fnA at a later `at`. + let! _ = + Seed.receiveOps + [] + [ setNameEvent loc fnA commit "2026-07-08T00:00:00.100Z" ] + let! _ = + Seed.receiveOps + [] + [ setNameEvent loc fnB commit "2026-07-08T00:00:00.200Z" ] + let res = + Resolutions.mk + loc + (PT.Reference.PackageFn(PT.Hash fnA)) + "human" + PT.mainBranchId + "2026-07-08T00:00:00.300Z" + do! Resolutions.recordAndApply res + let! beforeRebuild = liveHash loc + Expect.equal + beforeRebuild + [ fnA ] + "the override took (fnA, not the LWW winner fnB)" + // The rebuild re-folds from the op log AND (S6) re-applies resolutions. + let! _ = Seed.rebuildProjections () + let! afterRebuild = liveHash loc + Expect.equal + afterRebuild + [ fnA ] + "the override SURVIVED the rebuild — without reapplyAll it would revert to the LWW winner fnB" + finally + teardown insts + } + + testTask + "branch merge syncs across stores: a branch's create + merge land on B (merged_at set)" { + let mutable insts : List = [] + + try + let! a = seededInstance "a" + insts <- [ a ] + let! b = seededInstance "b" + insts <- [ a; b ] + + let branchId = System.Guid.NewGuid() + + activate a + let! baseCommit = existingCommit () + let! bCur0 = currentBranchCursor () + + let createB = + branchEvent ( + PT.BranchOp.CreateBranch( + branchId, + "feature", + Some PT.mainBranchId, + Some(PT.Hash baseCommit) + ) + ) + let mergeB = + branchEvent (PT.BranchOp.MergeBranch(branchId, PT.mainBranchId)) + + // Author on A: create the branch, then merge it. (Content-on-branch folding is covered by + // SyncScenarios before the merge; merge re-homes it, so this focuses on the lifecycle sync.) + let! _ = Seed.receiveBranchOps [ createB ] + let! _ = Seed.receiveBranchOps [ mergeB ] + + let! (branchWire, _) = Seed.branchOpsSince bCur0 1000L + + activate b + let! _ = + Seed.receiveBranchOps ( + branchWire + |> List.map (fun ((id, hex, ts) : string * string * string) -> + (id, System.Convert.FromHexString hex, ts)) + ) + + let! branchExists = + Sql.query "SELECT count(*) AS n FROM branches WHERE id = @b" + |> Sql.parameters [ "b", Sql.uuid branchId ] + |> Sql.executeRowAsync (fun read -> read.int64 "n") + let! mergedAt = + Sql.query "SELECT merged_at FROM branches WHERE id = @b" + |> Sql.parameters [ "b", Sql.uuid branchId ] + |> Sql.executeRowAsync (fun read -> read.stringOrNone "merged_at") + + Expect.equal branchExists 1L "the branch's create + merge synced to B" + Expect.isSome mergedAt "the merge marked the branch merged on B" + finally + teardown insts + } + + testTask + "structural convergence: concurrent rebases of one branch converge to the LWW winner, order-independent" { + let mutable insts : List = [] + + try + let! a = seededInstance "a" + insts <- [ a ] + let! b = seededInstance "b" + insts <- [ a; b ] + + let branchId = System.Guid.NewGuid() + let baseX = + "1111111111111111111111111111111111111111111111111111111111111111" + let baseY = + "2222222222222222222222222222222222222222222222222222222222222222" + + // Both instances know the branch (shared CreateBranch, older than either rebase). Then two + // instances rebase it CONCURRENTLY to different bases: X at ts .200 (newer) beats Y at ts .100. + let createB = + branchEventAt + (PT.BranchOp.CreateBranch( + branchId, + "feature", + Some PT.mainBranchId, + None + )) + "2026-01-01T00:00:00.000Z" + let rebaseX = + branchEventAt + (PT.BranchOp.RebaseBranch(branchId, PT.Hash baseX)) + "2026-07-08T00:00:00.200Z" + let rebaseY = + branchEventAt + (PT.BranchOp.RebaseBranch(branchId, PT.Hash baseY)) + "2026-07-08T00:00:00.100Z" + + let baseOf () : Task> = + Sql.query "SELECT base_commit_hash FROM branches WHERE id = @id" + |> Sql.parameters [ "id", Sql.uuid branchId ] + |> Sql.executeRowAsync (fun read -> read.stringOrNone "base_commit_hash") + + // A authors X (newer), THEN receives Y (older) — Y must lose the LWW. + activate a + let! _ = Seed.receiveBranchOps [ createB ] + let! _ = Seed.receiveBranchOps [ rebaseX ] + let! _ = Seed.receiveBranchOps [ rebaseY ] + let! aBase = baseOf () + + // B authors Y (older) FIRST, THEN receives X (newer) — X arrives last but must still win. + activate b + let! _ = Seed.receiveBranchOps [ createB ] + let! _ = Seed.receiveBranchOps [ rebaseY ] + let! _ = Seed.receiveBranchOps [ rebaseX ] + let! bBase = baseOf () + + Expect.equal + aBase + (Some baseX) + "A: the newer rebase (ts .200 → baseX) wins; the later-arriving older one is skipped" + Expect.equal + bBase + (Some baseX) + "B: converges to the SAME base though the winner arrived last — order-independent" + finally + teardown insts + } + + // ── CLI-surface tests (drive the real `dark ` dispatch against a real store) ────────────────── + + testTask + "dark conflicts renders a real recorded conflict (regression: short-hash slice was Int32)" { + // `conflicts.dark`'s `short` did `String.slice h 0 8` with bare Int32 literals; `String.slice` + // wants `Int`, so the whole `dark conflicts` display threw a type-mismatch on ANY real conflict. + // No unit test drove the display, so it was invisible. Build a genuine cross-store conflict, then + // assert the CLI renders it (location + truncated hashes) instead of crashing. + let mutable insts : List = [] + try + let! a = seededInstance "a" + insts <- [ a ] + let! b = seededInstance "b" + insts <- [ a; b ] + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "ConflictCli" ]; name = "dup" } + activate a + let! (fnA, fnB) = twoFunctionHashes () + let! commit = existingCommit () + let! curA = currentCursor () + let! _ = + Seed.receiveOps + [] + [ setNameEvent loc fnA commit "2026-07-08T00:00:00.100Z" ] + let! (cA, eA) = wireSince curA + activate b + let! _ = + Seed.receiveOps + [] + [ setNameEvent loc fnB commit "2026-07-08T00:00:00.200Z" ] + // B (holding the later LWW winner) receives A's older op → records a conflict. + let! _ = Seed.receiveOps cA eA + let! n = conflictCountAt "Test.ConflictCli.dup" + Expect.equal n 1L "the divergence was recorded as a conflict on B" + let! state = buildCliState () + let! out = runCli state [ "conflicts" ] + // If the `short` slice regressed, `String.slice` throws and `executeFunction` returns Error → + // `runCli` fails the test outright. Reaching here (with the location rendered) is the guard. + Expect.stringContains + out + "Test.ConflictCli.dup" + "the CLI lists the diverged location instead of crashing" + finally + teardown insts + } + + testTask + "dark conflicts on a converged store reports no conflicts (the clean path)" { + let mutable insts : List = [] + try + let! a = seededInstance "a" + insts <- [ a ] + activate a + let! n = conflictCount () + Expect.equal n 0L "a freshly-seeded store has no conflicts" + let! state = buildCliState () + let! out = runCli state [ "conflicts" ] + Expect.stringContains + out + "converged" + "the clean path reports everything is converged" + finally + teardown insts + } + + testTask + "the in-process CLI driver reads the active store (dispatch + rendering work end to end)" { + // Sanity that runCli actually drives the real dispatch against the swapped store — so the tests + // above are meaningful. `version` is a pure, always-available command with stable output. + let mutable insts : List = [] + try + let! a = seededInstance "a" + insts <- [ a ] + activate a + let! state = buildCliState () + let! out = runCli state [ "version" ] + Expect.isFalse (out = "") "the CLI produced output for `version`" + finally + teardown insts + } + + testTask + "an instance can view a real seeded package item — `dark view Stdlib.Option.Option`" { + // A realistic baseline (per Stachu): the seeded store holds REAL packages, and the CLI resolves + + // renders a well-known one. Grounds the synthetic Test.* convergence scenarios in something real. + let mutable insts : List = [] + try + let! a = seededInstance "a" + insts <- [ a ] + activate a + let! state = buildCliState () + let! out = runCli state [ "view"; "Darklang.Stdlib.Option.Option" ] + Expect.stringContains + out + "Option" + "the real Option type resolves + renders" + Expect.stringContains + out + "Some" + "…and shows its cases (Some/None) — a genuine view, not an error" + let low = out.ToLower() + Expect.isFalse + (low.Contains "not found" + || low.Contains "no such" + || low.Contains "error") + "the view isn't an error banner" + finally + teardown insts + } ] diff --git a/backend/tests/Tests/OpsProjections.Tests.fs b/backend/tests/Tests/OpsProjections.Tests.fs new file mode 100644 index 0000000000..d5021ffcf4 --- /dev/null +++ b/backend/tests/Tests/OpsProjections.Tests.fs @@ -0,0 +1,546 @@ +/// Tests for ops⊥projections (LibDB.Seed.rebuildProjections). +/// Proves the central claim of the storage split: the projection tables are +/// *regenerable from the op log* — drop them, re-fold package_ops, and they +/// come back identical. The op log (package_ops) is canonical and untouched. +module Tests.OpsProjections + +open Expecto + +open System.Threading.Tasks +open FSharp.Control.Tasks + +open Prelude + +open Fumble +open LibDB.Sqlite + +module Seed = LibDB.Seed +module Releases = LibDB.Releases +module PT = LibExecution.ProgramTypes +module Inserts = LibDB.Inserts +module BS = LibSerialization.Binary.Serialization + +let private countRows (table : string) : Task = + Sql.query $"SELECT COUNT(*) as n FROM {table}" + |> Sql.executeRowAsync (fun read -> read.int64 "n") + +/// A content fingerprint of the projections: the sorted set of every projected item's hash. Two folds that +/// produce the same fingerprint produced the same projections (down to identity), regardless of row order +/// or nondeterministic columns like `location_id`. +let private itemHashes () : Task = + task { + let q (table : string) = + Sql.query $"SELECT hash FROM {table} ORDER BY hash" + |> Sql.executeAsync (fun read -> read.string "hash") + let! fns = q "package_functions" + let! typs = q "package_types" + let! vals = q "package_values" + return String.concat "\n" (fns @ typs @ vals) + } + +// `testSequenced` because the drop+rebuild case DELETEs + refolds the *shared* projection +// tables and marks all ops unapplied — it must not run concurrently with other DB tests (it +// would race their reads/writes mid-rebuild). The registry cases are pure but ride along. +let tests = + testSequenced + <| testList + "OpsProjections" + [ testTask + "rebuildProjections deterministically regenerates projections from the op log" { + // package_blobs is canonical content — a rebuild must never touch it + let! blobsBefore = countRows "package_blobs" + + // drop the regenerable projections + re-fold the entire op log + let! reapplied = Seed.rebuildProjections () + Expect.isTrue (reapplied > 0L) "ops were re-folded" + let! fns1 = countRows "package_functions" + let! locs1 = countRows "locations" + Expect.isTrue + (fns1 > 0L) + "projections regenerated (non-empty) from the op log" + + // a SECOND rebuild reproduces the EXACT same projections — the rebuild is a deterministic + // function of the op log. (Robust to other tests mutating the shared DB: we compare two + // rebuilds of the *current* log, not a pristine-seed count they'd perturb.) + let! _ = Seed.rebuildProjections () + let! fns2 = countRows "package_functions" + let! locs2 = countRows "locations" + Expect.equal + fns2 + fns1 + "package_functions: a re-rebuild reproduces the same projection" + Expect.equal + locs2 + locs1 + "locations: a re-rebuild reproduces the same projection" + + // canonical content (package_blobs) is NOT a projection — untouched across rebuilds + let! blobsAfter = countRows "package_blobs" + Expect.equal + blobsAfter + blobsBefore + "package_blobs (canonical content) preserved, not dropped" + } + + // Stronger than the count check above: the exact CONTENT of the projections (the set of projected + // item hashes) is reproduced byte-for-byte across a re-fold — the fold is a deterministic function + // of the op log, not merely cardinality-preserving. This is what makes "drop the projections and + // re-fold" safe, and (later) what lets two instances fold the same log to the same tables. + testTask + "re-fold reproduces identical projection CONTENT (deterministic fold, not just counts)" { + let itemHashes () : Task = + task { + let q (table : string) = + Sql.query $"SELECT hash FROM {table} ORDER BY hash" + |> Sql.executeAsync (fun read -> read.string "hash") + let! fns = q "package_functions" + let! typs = q "package_types" + let! vals = q "package_values" + return String.concat "\n" (fns @ typs @ vals) + } + + let! _ = Seed.rebuildProjections () + let! fp1 = itemHashes () + Expect.isTrue + (String.length fp1 > 0) + "non-vacuous: the projections have content" + let! _ = Seed.rebuildProjections () + let! fp2 = itemHashes () + Expect.equal + fp2 + fp1 + "the exact set of projected item hashes is identical across a re-fold (deterministic fold)" + } + + // The authoring stamp behind the timestamp-LWW: locally-inserted ops must get a STRICTLY-increasing + // origin_ts, even within one wall-clock millisecond — otherwise two sequential SetNames to the same + // name would tie and be reordered by content hash (a later edit could lose its own location). + test + "origin_ts stamps are strictly increasing (sequential local edits never tie the LWW)" { + let stamps = List.init 100 (fun _ -> LibDB.Inserts.nextOriginTs ()) + Expect.equal + stamps + (List.sort stamps) + "stamps are monotonic (non-decreasing)" + Expect.equal + (List.length (List.distinct stamps)) + 100 + "stamps are strictly distinct — no ties even across a burst within one millisecond" + } + + // ── THE POINT, end to end: migrate a store from one Release of Dark to the next WITHOUT losing + // authored work. A *durable* Release step carries the op log forward (a schema copy-swap + an optional + // op-format re-serialize); the projections are then dropped and RE-FOLDED from that same log in the + // new Release's format. This is exactly why the two design pieces exist: + // • ops ⊥ projections — you migrate the LOG (the authored work), never the derived tables; the + // projections are disposable and regenerated. Losing a projection costs only CPU. + // • meaning-stable hashing — a format re-serialize keeps each op's IDENTITY (the id hashes the op's + // MEANING, not its bytes), so names/dependencies don't churn across the migration. + // (Contrast the shipped Release 3, a clean-BREAK that throws the package data away and rebuilds — this + // test proves the DURABLE path that carries it forward, the one a real future release will use.) ── + testTask + "release migration (durable): authored op log carried forward + projections re-folded, nothing lost" { + let! opsBefore = countRows "package_ops" + let! blobsBefore = countRows "package_blobs" + Expect.isTrue + (opsBefore > 0L) + "there is authored work to migrate (not a vacuous test)" + let! fpBefore = itemHashes () + + // A durable forward Release step (n = code+1): a real schema change (the index below) that runs the + // reserialize branch of applyRelease (NOT clearForRebuild) — so the authored op log is preserved and + // carried forward, then re-folded. What this asserts: nothing is LOST across a durable release (op-log + // count, blobs, and the re-folded projections all survive identically). + // CLEANUP(reserialize-test): the remap is identity because `reserialize : byte[] -> byte[]` doesn't get + // the op id, so a genuine deserialize→re-encode can't be driven here. A real byte-changing-but-meaning- + // stable test needs the id threaded into reserialize; until then this exercises the path, not the transform. + Releases.applyRelease + { n = Releases.currentRelease + 1 + sql = + "CREATE INDEX IF NOT EXISTS idx_release_migration_demo ON package_ops(origin_ts)" + reserialize = Some(fun blob -> blob) + clearForRebuild = false } + // the step marked the log unapplied; startup re-folds the projections from the (carried-forward) log + let! _ = Seed.rebuildProjections () + + let! opsAfter = countRows "package_ops" + let! blobsAfter = countRows "package_blobs" + let! fpAfter = itemHashes () + Expect.equal + opsAfter + opsBefore + "the authored op log is PRESERVED across the migration — nothing lost" + Expect.equal + blobsAfter + blobsBefore + "canonical content (package_blobs) preserved" + Expect.equal + fpAfter + fpBefore + "projections re-fold IDENTICALLY in the new Release — same items, meaning-stable" + + let! idxExists = + Sql.query + "SELECT COUNT(*) as n FROM sqlite_master WHERE type='index' AND name='idx_release_migration_demo'" + |> Sql.executeRowAsync (fun read -> read.int64 "n") + Expect.equal idxExists 1L "the Release's schema change actually landed" + + // leave the shared store as we found it + do! + Sql.query "DROP INDEX IF EXISTS idx_release_migration_demo" + |> Sql.executeStatementAsync + } + + // the projection registry — the fold/dirty descriptors + test "the projection registry covers exactly the 6 regenerable projections" { + Expect.equal + (List.sort Seed.projectionTables) + (List.sort + [ "package_functions" + "package_types" + "package_values" + "locations" + "package_dependencies" + "deprecations" ]) + "the registry's tables are exactly Seed.export's stripped projections (incl. deprecations)" + } + + // A schema change keeps your work. The bootstrap drops ONLY `projectionTables` and re-folds the op + // log (LocalExec.Migrations.dropProjectionTables) — so the authored, canonical data must NEVER appear + // in that drop-set. If it did, a schema bump would delete your work. This guards that line. + test + "a schema change never drops the op log: no canonical table is in the projection drop-set" { + let canonical = + [ "package_ops" // the authored op log — the truth + "package_blobs" // canonical content (op-playback never writes it) + "branches" + "commits" + "branch_ops" + "accounts_v0" + "user_data_v0" + "toplevels_v0" + "scripts_v0" + "sync_remotes" + "sync_cursors" + "sync_conflicts" ] + canonical + |> List.iter (fun t -> + Expect.isFalse + (List.contains t Seed.projectionTables) + $"{t} is canonical and must NOT be in the projection drop-set (it would be lost on a schema change)") + } + + // A schema change keeps your work, end to end. A schema change now runs `rebuildProjections` (drop + // projections + re-fold), exactly what this exercises. The first test pins projection-regen + blobs; + // this pins the thing that actually matters — your authored op LOG (and branch/commit state) come + // through a full re-fold IDENTICAL. If this regresses, a schema bump is eating real work. + testTask "a schema change keeps your work: a full re-fold preserves the op log" { + let! opsBefore = countRows "package_ops" + let! branchesBefore = countRows "branches" + let! commitsBefore = countRows "commits" + Expect.isTrue + (opsBefore > 0L) + "there are ops to preserve (not a vacuous test)" + + let! _ = Seed.rebuildProjections () + + let! opsAfter = countRows "package_ops" + let! branchesAfter = countRows "branches" + let! commitsAfter = countRows "commits" + Expect.equal + opsAfter + opsBefore + "package_ops (the authored op log) is untouched by a re-fold" + Expect.equal + branchesAfter + branchesBefore + "branches preserved across a re-fold" + Expect.equal commitsAfter commitsBefore "commits preserved across a re-fold" + } + + + // The append seam sync sits on (`Seed.receiveOps` ← `Builtin.packageOpsAppendNative`). Re-receiving the log's own + // committed ops is a no-op — INSERT OR IGNORE on the content-addressed ids — so the cursor comes back as + // the current max rowid and the projections are unchanged. This is what makes an incremental pull safe to + // retry; the same append path a real peer's events take (commits shipped alongside them). + testTask + "receiveOps is idempotent and reports zero newly-applied for known ops" { + let! events = + Sql.query + "SELECT id, op_blob, branch_id, commit_hash, origin_ts FROM package_ops WHERE commit_hash IS NOT NULL ORDER BY rowid DESC LIMIT 8" + |> Sql.executeAsync (fun read -> + (System.Guid.Parse(read.string "id"), + read.bytes "op_blob", + System.Guid.Parse(read.string "branch_id"), + read.string "commit_hash", + read.string "origin_ts")) + + Expect.isTrue + (not (List.isEmpty events)) + "there are committed ops to re-receive" + + let! fnsBefore = countRows "package_functions" + let! applied = Seed.receiveOps [] events + let! fnsAfter = countRows "package_functions" + + Expect.equal + applied + 0L + "re-receiving existing ops applies 0 (INSERT OR IGNORE) — the honest change count" + Expect.equal + fnsAfter + fnsBefore + "re-receiving existing ops is a no-op (idempotent append)" + } + + // These tests (and SyncScenarios.Tests.fs) exercise the receive/fold/detect/resolve seam on ONE store, + // applying a "peer's" ops through the real receive path — which is where convergence, LWW, and the + // origin_ts reconcile actually live. The genuinely-two-instance case (N isolated stores syncing the wire, + // torn down per test) lives in MultiInstance.Tests.fs, and the real-process/HTTP case in SyncE2E.Tests.fs. + + // The convergence property, at the seam: a genuinely NEW op arriving from a "peer" (here: a fresh + // SetName binding an unused name to an existing fn hash) must be appended PRESERVING its origin_ts — not + // re-stamped with a fresh local one, which is exactly what would make two instances' LWW diverge — and + // then folded into `locations` by the invisible playback. This is what carries across the HTTP wire. + testTask "receiveOps appends a new op preserving origin_ts and folds it" { + let! fnHash = + Sql.query "SELECT hash FROM package_functions LIMIT 1" + |> Sql.executeRowAsync (fun read -> read.string "hash") + let! commitHash = + Sql.query "SELECT hash FROM commits LIMIT 1" + |> Sql.executeRowAsync (fun read -> read.string "hash") + + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "SyncConv" ]; name = "thing" } + let op = PT.PackageOp.SetName(loc, PT.Reference.PackageFn(PT.Hash fnHash)) + let opId = Inserts.computeOpHash op + let opBlob = BS.PT.PackageOp.serialize opId op + // A stamp no local edit would ever produce, so preservation is unambiguous. + let distinctiveTs = "2099-01-01 00:00:00.000042" + + let deleteOp () : Task = + Sql.query "DELETE FROM package_ops WHERE id = @id" + |> Sql.parameters [ "id", Sql.uuid opId ] + |> Sql.executeStatementAsync + do! deleteOp () // clean any prior run + + let! _ = + Seed.receiveOps + [] + [ (opId, opBlob, PT.mainBranchId, commitHash, distinctiveTs) ] + + let! storedTs = + Sql.query "SELECT origin_ts FROM package_ops WHERE id = @id" + |> Sql.parameters [ "id", Sql.uuid opId ] + |> Sql.executeRowAsync (fun read -> read.string "origin_ts") + Expect.equal + storedTs + distinctiveTs + "the received op kept its original origin_ts (not a fresh local stamp)" + + let! bound = + Sql.query + "SELECT item_hash FROM locations WHERE owner = 'Test' AND modules = 'SyncConv' AND name = 'thing' AND unlisted_at IS NULL" + |> Sql.executeAsync (fun read -> read.string "item_hash") + Expect.equal + bound + [ fnHash ] + "the received op folded into `locations` (invisible playback)" + + // restore the shared DB: drop the test op + its projection row, re-fold + do! deleteOp () + do! + Sql.query + "DELETE FROM locations WHERE owner = 'Test' AND modules = 'SyncConv' AND name = 'thing'" + |> Sql.executeStatementAsync + let! _ = Seed.rebuildProjections () + () + } + + testTask + "conflict → resolution → converge: divergence detected, LWW applied, human override wins" { + // Two distinct fn contents to bind one name to, in turn. + let! twoFns = + Sql.query "SELECT hash FROM package_functions LIMIT 2" + |> Sql.executeAsync (fun read -> read.string "hash") + + let hashA, hashB = + match twoFns with + | a :: b :: _ -> a, b + | _ -> Exception.raiseInternal "seed needs >=2 functions" [] + + let! commitHash = + Sql.query "SELECT hash FROM commits LIMIT 1" + |> Sql.executeRowAsync (fun read -> read.string "hash") + + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "Diverge" ]; name = "dv" } + + let mkEvent (h : string) (ts : string) = + let op = PT.PackageOp.SetName(loc, PT.Reference.PackageFn(PT.Hash h)) + let opId = Inserts.computeOpHash op + (opId, BS.PT.PackageOp.serialize opId op, PT.mainBranchId, commitHash, ts) + + let (idA, blobA, _, _, _) = mkEvent hashA "2099-01-01T00:00:00.001Z" + let (idB, blobB, _, _, _) = mkEvent hashB "2099-01-01T00:00:00.002Z" + + let cleanup () : Task = + task { + do! + Sql.query "DELETE FROM package_ops WHERE id = @a OR id = @b" + |> Sql.parameters [ "a", Sql.uuid idA; "b", Sql.uuid idB ] + |> Sql.executeStatementAsync + do! + Sql.query + "DELETE FROM locations WHERE owner = 'Test' AND modules = 'Diverge' AND name = 'dv'" + |> Sql.executeStatementAsync + do! + Sql.query + "DELETE FROM sync_conflicts WHERE location = 'Test.Diverge.dv'" + |> Sql.executeStatementAsync + do! + Sql.query "DELETE FROM resolutions WHERE location = 'Test.Diverge.dv'" + |> Sql.executeStatementAsync + } + + do! cleanup () + + // #1: bind the name to A (no prior binding — no divergence). + let! _ = + Seed.receiveOps + [] + [ (idA, blobA, PT.mainBranchId, commitHash, "2099-01-01T00:00:00.001Z") ] + // #2: a peer's op rebinds it to B — that's a divergence (curHash=A ≠ incoming=B), auto-resolved by LWW. + let! _ = + Seed.receiveOps + [] + [ (idB, blobB, PT.mainBranchId, commitHash, "2099-01-01T00:00:00.002Z") ] + + let! conflicts = LibDB.Conflicts.list () + + let recorded = + conflicts + |> List.exists (fun (c : LibDB.Conflicts.Conflict) -> + c.location = "Test.Diverge.dv" + && c.localHash = hashA + && c.incomingHash = hashB + && c.chosenHash = hashB) // B is newer-by-stamp, so LWW picks it — and that's recorded + + Expect.isTrue + recorded + "detectDivergences recorded the name→two-hashes divergence with the LWW winner" + + // The live binding is B — LWW picked the newer op. + let liveHash () : Task> = + Sql.query + "SELECT item_hash FROM locations WHERE owner = 'Test' AND modules = 'Diverge' AND name = 'dv' AND unlisted_at IS NULL" + |> Sql.executeAsync (fun read -> read.string "item_hash") + + let! boundLww = liveHash () + Expect.equal boundLww [ hashB ] "LWW bound the name to the newer content (B)" + + // A human keeps THEIR version (A): mint + apply a Resolution with a newer `at` so it wins the overlay. + let res : LibDB.Resolutions.Resolution = + { id = "test-resolution-diverge" + branchId = PT.mainBranchId + location = loc + choice = PT.Reference.PackageFn(PT.Hash hashA) + resolvedBy = "human" + at = "2099-01-01T00:00:00.003Z" } + + do! LibDB.Resolutions.recordAndApply res + + // The binding converged on the human's choice (A), overriding the LWW outcome — the "keep mine" that + // then propagates as a synced Resolution so peers converge too. + let! boundResolved = liveHash () + + Expect.equal + boundResolved + [ hashA ] + "the resolution overrode the LWW binding → converged on the human's pick" + + do! cleanup () + let! _ = Seed.rebuildProjections () + () + } + + // The op id is content-only, so two instances that independently author the SAME op + // stamp it with different local origin_ts. receiveOps must reconcile to the MIN (deterministic on every + // instance) in BOTH package_ops AND the folded locations binding — otherwise a later competing edit + // resolves differently on each instance and they diverge permanently. This is the two-instance + // convergence property, reproduced on one store via re-receives at different stamps. + testTask + "a re-received op reconciles origin_ts to the MIN in package_ops + locations (convergence)" { + let! fnHash = + Sql.query "SELECT hash FROM package_functions LIMIT 1" + |> Sql.executeRowAsync (fun read -> read.string "hash") + let! commitHash = + Sql.query "SELECT hash FROM commits LIMIT 1" + |> Sql.executeRowAsync (fun read -> read.string "hash") + + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "M1Reconcile" ]; name = "dv" } + let op = PT.PackageOp.SetName(loc, PT.Reference.PackageFn(PT.Hash fnHash)) + let opId = Inserts.computeOpHash op + let opBlob = BS.PT.PackageOp.serialize opId op + + let recv (ts : string) : Task = + task { + let! _ = + Seed.receiveOps [] [ (opId, opBlob, PT.mainBranchId, commitHash, ts) ] + () + } + + let opTs () : Task = + Sql.query "SELECT origin_ts FROM package_ops WHERE id = @id" + |> Sql.parameters [ "id", Sql.uuid opId ] + |> Sql.executeRowAsync (fun read -> read.string "origin_ts") + + let locTs () : Task> = + Sql.query + "SELECT origin_ts FROM locations WHERE owner = 'Test' AND modules = 'M1Reconcile' AND name = 'dv' AND unlisted_at IS NULL" + |> Sql.executeAsync (fun read -> read.string "origin_ts") + + let cleanup () : Task = + task { + do! + Sql.query "DELETE FROM package_ops WHERE id = @id" + |> Sql.parameters [ "id", Sql.uuid opId ] + |> Sql.executeStatementAsync + do! + Sql.query + "DELETE FROM locations WHERE owner = 'Test' AND modules = 'M1Reconcile' AND name = 'dv'" + |> Sql.executeStatementAsync + } + + do! cleanup () + + // #1 receive at ts=100 → binding folded with 100 + do! recv "2099-01-01T00:00:00.100Z" + let! ts1 = opTs () + let! loc1 = locTs () + Expect.equal ts1 "2099-01-01T00:00:00.100Z" "op stamped at 100" + Expect.equal loc1 [ "2099-01-01T00:00:00.100Z" ] "binding folded at 100" + + // #2 re-receive the SAME op at an EARLIER 050 → reconcile DOWN to MIN, and the binding re-folds to 050 + do! recv "2099-01-01T00:00:00.050Z" + let! ts2 = opTs () + let! loc2 = locTs () + Expect.equal ts2 "2099-01-01T00:00:00.050Z" "op reconciled to the MIN (050)" + Expect.equal + loc2 + [ "2099-01-01T00:00:00.050Z" ] + "binding origin_ts refreshed to the MIN (050)" + + // #3 re-receive at a LATER 200 → MIN stays 050, no spurious change + do! recv "2099-01-01T00:00:00.200Z" + let! ts3 = opTs () + Expect.equal + ts3 + "2099-01-01T00:00:00.050Z" + "a later stamp never raises the reconciled MIN" + + do! cleanup () + let! _ = Seed.rebuildProjections () + () + } ] diff --git a/backend/tests/Tests/Releases.Tests.fs b/backend/tests/Tests/Releases.Tests.fs new file mode 100644 index 0000000000..411e9776c5 --- /dev/null +++ b/backend/tests/Tests/Releases.Tests.fs @@ -0,0 +1,171 @@ +/// Tests for the Release migrator's planning + guard logic (LibDB.Releases). +/// +/// The DB-mutating half (storedRelease/writeRelease/applyPending) is exercised by every suite startup +/// — the migrator runs in `LocalExec.Migrations.run` before the Tests binary boots, so if it threw the +/// suite wouldn't start. These tests pin the PURE half — `pendingReleases` (which steps to apply) and +/// `registryIsWellFormed` (the gap/dup/over-code guard) — over injected registries, plus a guard that +/// the REAL registry is well-formed against the code's current Release. +module Tests.Releases + +open Expecto +open Prelude + +module Releases = LibDB.Releases + +/// a step that only declares its Release number (no migration body) — enough for the planning tests +let private step (n : int) : Releases.Release = + { n = n; sql = ""; reserialize = None; clearForRebuild = false } + +let tests = + testList + "Releases" + [ test "pendingReleases: an empty registry never has anything to apply" { + Expect.isEmpty (Releases.pendingReleases [] 1 5) "empty registry → no steps" + } + + test "pendingReleases: returns exactly the steps in (storeN, codeN], ascending" { + let registry = [ step 4; step 2; step 3; step 5 ] // deliberately unsorted + Expect.equal + (Releases.pendingReleases registry 2 5 |> List.map (fun r -> r.n)) + [ 3; 4; 5 ] + "store 2 → code 5 applies 3,4,5 in order" + Expect.equal + (Releases.pendingReleases registry 3 4 |> List.map (fun r -> r.n)) + [ 4 ] + "store 3 → code 4 applies only 4" + } + + test + "pendingReleases: nothing to do when the store is already at the code Release" { + let registry = [ step 2; step 3 ] + Expect.isEmpty + (Releases.pendingReleases registry 3 3) + "store == code → no steps (the common steady state)" + } + + test + "pendingReleases: a step at or below the store Release is never re-applied" { + let registry = [ step 2; step 3; step 4 ] + Expect.equal + (Releases.pendingReleases registry 3 4 |> List.map (fun r -> r.n)) + [ 4 ] + "already-applied steps (<= storeN) are excluded" + } + + test + "registryIsWellFormed: a contiguous, distinct, in-range registry is well-formed" { + Expect.isTrue + (Releases.registryIsWellFormed [ step 2; step 3; step 4 ] 4) + "2,3,4 with code 4 is well-formed" + Expect.isTrue + (Releases.registryIsWellFormed [] 2) + "an empty registry is well-formed" + } + + test + "registryIsWellFormed: a GAP is rejected (it would silently skip a migration)" { + Expect.isFalse + (Releases.registryIsWellFormed [ step 2; step 4 ] 4) + "2 then 4 (missing 3) is not well-formed" + } + + test "registryIsWellFormed: a DUPLICATE is rejected (it would double-apply)" { + Expect.isFalse + (Releases.registryIsWellFormed [ step 2; step 3; step 3 ] 3) + "a repeated Release number is not well-formed" + } + + test + "registryIsWellFormed: a step ABOVE the code Release is rejected (unreachable)" { + Expect.isFalse + (Releases.registryIsWellFormed [ step 2; step 3 ] 2) + "a step at Release 3 when the code speaks only 2 is not well-formed" + } + + // The guard that protects the shipped registry: whatever steps exist must be well-formed against + // the Release this binary actually speaks. `applyPending` asserts this at boot; pin it here too so + // a malformed registry fails in CI, not on someone's machine at startup. + test + "the shipped Release registry is well-formed against the code's current Release" { + Expect.isTrue + (Releases.registryIsWellFormed Releases.releases Releases.currentRelease) + "LibDB.Releases.releases is contiguous/distinct and none above wireFormatVersion" + } + + // Release 3 (meaning-stable hashing) is the first real step, and it's a clean-break boundary. + test "Release 3 is the shipped meaning-stable-hashing clean-break step" { + match Releases.releases |> List.tryFind (fun r -> r.n = 3) with + | Some r -> + Expect.isTrue + r.clearForRebuild + "Release 3 is a clean-break (clearForRebuild) — pre-v3 data is disposable, rebuilt from source" + | None -> failtest "expected a Release 3 entry in the shipped registry" + } + + // a v2 store upgrades to the current code Release via exactly the shipped steps (here: just 3). + test "a v2 store upgrades to the current Release via the shipped steps" { + let steps = + Releases.pendingReleases Releases.releases 2 Releases.currentRelease + |> List.map (fun r -> r.n) + Expect.equal + steps + [ 3 ] + "store 2 → code 3 applies exactly Release 3 (the clean-break)" + } + + // planRelease — the boot-guard DECISION, pure so the refuse-newer safety property is unit-tested + // without mutating the store. (applyPending wraps it with the DB read/write; its DB half runs at + // every suite startup.) ReleaseAction carries a Release (which holds a function), so it has no + // structural equality — we match instead of Expect.equal. + test + "planRelease: no stored Release → StampFresh (fresh or pre-tracking store)" { + match Releases.planRelease [ step 3 ] None 3 with + | Releases.StampFresh -> () + | other -> failtest $"expected StampFresh, got %A{other}" + } + + test "planRelease: store == code → UpToDate (the steady state)" { + match Releases.planRelease [ step 3 ] (Some 3) 3 with + | Releases.UpToDate -> () + | other -> failtest $"expected UpToDate, got %A{other}" + } + + test + "planRelease: store > code → RefuseNewer (never open a newer store with older code)" { + match Releases.planRelease [ step 3 ] (Some 5) 3 with + | Releases.RefuseNewer s -> + Expect.equal s 5 "refuses, reporting the store's Release" + | other -> failtest $"expected RefuseNewer 5, got %A{other}" + } + + test "planRelease: store < code → Migrate the pending steps, in order" { + match Releases.planRelease [ step 2; step 3; step 4 ] (Some 2) 4 with + | Releases.Migrate steps -> + Expect.equal + (steps |> List.map (fun r -> r.n)) + [ 3; 4 ] + "store 2 → code 4 migrates exactly 3,4 ascending" + | other -> failtest $"expected Migrate [3;4], got %A{other}" + } + + // The boot guard end-to-end over the real store (the pure decision is tested above; this exercises + // writeRelease → storedRelease → applyPending against the DB). We stamp the store NEWER than the code + // and confirm applyPending refuses to open it. We only exercise the REFUSE path — it raises before any + // migration runs, so it's non-destructive; running a real forward step would execute the Release-3 + // clean-break and wipe the shared test DB. try/finally restores the stamp so the rest of the suite is + // unaffected (the store was born at currentRelease, so restoring to it is a no-op). + test + "applyPending refuses a store stamped at a NEWER Release (boot guard, over the DB)" { + let cur = Releases.currentRelease + try + Releases.writeRelease (cur + 1) + Expect.equal + (Releases.storedRelease ()) + (Some(cur + 1)) + "store stamped one Release newer than the code" + Expect.throws + (fun () -> Releases.applyPending cur) + "older code must refuse to open a store from a newer Release" + finally + Releases.writeRelease cur + } ] diff --git a/backend/tests/Tests/SyncE2E.Tests.fs b/backend/tests/Tests/SyncE2E.Tests.fs new file mode 100644 index 0000000000..dc639cb5e2 --- /dev/null +++ b/backend/tests/Tests/SyncE2E.Tests.fs @@ -0,0 +1,431 @@ +/// HEAVY, flag-gated end-to-end sync tests. Unlike `MultiInstance.Tests.fs` (which drives the store + +/// CLI in-process), this spins up REAL `dark` processes, each with its own rundir + data.db, and syncs +/// them over REAL HTTP — the one layer the in-process tests can't reach: the actual `/sync/events` server, +/// the `pull` loop + cursors, and process isolation. +/// +/// It's slow (a fresh process per command, ~1.3s cold-start each) and needs the Cli exe built, so it's +/// OFF by default. Enable it with the `DARK_E2E=1` env var: +/// +/// DARK_E2E=1 ./scripts/run-backend-tests --filter-test-list "SyncE2E" +/// +/// When the flag is absent, the suite collapses to a single skipped test that says how to turn it on — so +/// a normal `run-backend-tests` neither builds the exe nor pays the cost. +module Tests.SyncE2E + +open Expecto +open System.Threading.Tasks +open FSharp.Control.Tasks +open Prelude + +module Config = LibConfig.Config + +// ── flag gate ───────────────────────────────────────────────────────────────────────────────────────── +let private enabled : bool = + match System.Environment.GetEnvironmentVariable "DARK_E2E" with + | null + | "" + | "0" -> false + | _ -> true + +// ── locating the built Cli exe + a loaded seed store ──────────────────────────────────────────────── +// The exe lands under /backend/Build/out/Cli/Debug/net/Cli. run-backend-tests runs the +// Tests exe with CWD = /backend, so try both that and the repo root; glob for the file so a +// .NET version bump doesn't break the path. +let private cliExe : string = + [ "Build/out/Cli/Debug"; "backend/Build/out/Cli/Debug" ] + |> List.tryPick (fun dir -> + if System.IO.Directory.Exists dir then + System.IO.Directory.EnumerateFiles( + dir, + "Cli", + System.IO.SearchOption.AllDirectories + ) + |> Seq.tryHead + else + None) + |> Option.map System.IO.Path.GetFullPath + |> Option.defaultValue "" + +/// The live test store (run-backend-tests reloads packages into it before the suite). It is MUTATED by +/// other tests running in parallel, so we never seed directly from it. +let private liveStore : string = System.IO.Path.GetFullPath Config.dbPath + +/// Shell `sqlite3 ` (matches the bash harness; sqlite3 CLI is in the devcontainer). +let private sqlite (db : string) (sql : string) : string = + let psi = System.Diagnostics.ProcessStartInfo() + psi.FileName <- "sqlite3" + psi.ArgumentList.Add db + psi.ArgumentList.Add sql + psi.RedirectStandardOutput <- true + psi.UseShellExecute <- false + use p = System.Diagnostics.Process.Start(psi) + let out = p.StandardOutput.ReadToEnd() + p.WaitForExit(10_000) |> ignore + out.Trim() + +/// A frozen, consistent snapshot of the live store, captured ONCE. Every instance is a copy of this, and +/// baselines are read from this — so `mk` (copy) and `presync` (baseline read) always agree, even while +/// the live store keeps moving under concurrent tests. We copy the WAL/SHM sidecars for a consistent point, +/// then `wal_checkpoint(TRUNCATE)` collapses the WAL into the main file — so a plain `File.Copy` of the main +/// file alone is a COMPLETE store (an instance that copied only the main file would otherwise be missing +/// rows the WAL still held, leaving it behind its own sync cursor → "already up to date"). +let private seedDb : Lazy = + lazy + (let dst = + System.IO.Path.Combine("/tmp", $"dark-e2e-seed-{System.Guid.NewGuid()}.db") + for suffix in [ ""; "-wal"; "-shm" ] do + if System.IO.File.Exists(liveStore + suffix) then + System.IO.File.Copy(liveStore + suffix, dst + suffix, overwrite = true) + sqlite dst "PRAGMA wal_checkpoint(TRUNCATE);" |> ignore + dst) + +let private ansi = System.Text.RegularExpressions.Regex(@"\x1b\[[0-9;]*m") +let private strip (s : string) : string = ansi.Replace(s, "") + +// ── process helpers ───────────────────────────────────────────────────────────────────────────────── +let private startInfo + (dir : string) + (args : string list) + : System.Diagnostics.ProcessStartInfo = + let psi = System.Diagnostics.ProcessStartInfo() + psi.FileName <- cliExe + args |> List.iter psi.ArgumentList.Add + psi.RedirectStandardOutput <- true + psi.RedirectStandardError <- true + psi.UseShellExecute <- false + psi.WorkingDirectory <- dir + psi.Environment["DARK_CONFIG_RUNDIR"] <- dir + psi.Environment["DARK_CONFIG_DB_NAME"] <- "data.db" + psi + +/// Run `dark ` against instance to completion; return combined, color-stripped stdout+stderr. +let private darkIn (dir : string) (args : string list) : string = + use p = System.Diagnostics.Process.Start(startInfo dir args) + let out = p.StandardOutput.ReadToEnd() + let err = p.StandardError.ReadToEnd() + p.WaitForExit(60_000) |> ignore + strip (out + err) + +// ── instance lifecycle ────────────────────────────────────────────────────────────────────────────── +type Instance = { name : string; dir : string } + +let private mk (root : string) (name : string) : Instance = + let dir = System.IO.Path.Combine(root, name) + System.IO.Directory.CreateDirectory(System.IO.Path.Combine(dir, "logs")) + |> ignore + // The CLI stores its login/session config at `/rundir/cli-config.json` (a path relative to the + // process's working directory — which we set to this instance dir). Create that subdir so `login` + // persists and later `commit` processes see a logged-in user — and so each instance's login is isolated. + System.IO.Directory.CreateDirectory(System.IO.Path.Combine(dir, "rundir")) + |> ignore + System.IO.File.Copy( + seedDb.Force(), + System.IO.Path.Combine(dir, "data.db"), + overwrite = true + ) + { name = name; dir = dir } + +let private dbOf (inst : Instance) : string = + System.IO.Path.Combine(inst.dir, "data.db") + +/// Serve on in the background; poll `/sync/health` until it answers. Returns the process +/// (kill it to stop). Health-check via HttpClient — real HTTP, no curl dependency. +let private serve (inst : Instance) (port : int) : Task = + task { + let p = + System.Diagnostics.Process.Start( + startInfo inst.dir [ "sync"; "serve"; "--port"; string port ] + ) + use http = new System.Net.Http.HttpClient() + http.Timeout <- System.TimeSpan.FromSeconds 2.0 + let mutable healthy = false + let mutable tries = 0 + while not healthy && tries < 40 do + try + let! resp = http.GetAsync($"http://127.0.0.1:{port}/sync/health") + healthy <- resp.IsSuccessStatusCode + with _ -> + () + if not healthy then + do! Task.Delay 250 + tries <- tries + 1 + if not healthy then + // kill the started process before bailing, or it keeps holding the port for the next run + let killed = + try + p.Kill(entireProcessTree = true) + true + with _ -> + false + ignore killed + Exception.raiseInternal + $"serve {inst.name} never became healthy on port {port}" + [] + return p + } + +let private stop (p : System.Diagnostics.Process) : unit = + try + p.Kill(entireProcessTree = true) + with _ -> + () + +/// Connect to and set the per-log cursors to the UNCHANGING seed baseline — the +/// "already synced up to the common seed" point, so only the ops a scenario authored (rowid > seed) +/// transfer (matches the bash harness; keeps the batch tiny + avoids re-shipping the whole seed). +let private presync (inst : Instance) (peerUrl : string) : unit = + darkIn inst.dir [ "sync"; "connect"; peerUrl ] |> ignore + let baseline (table : string) = + let v = sqlite (seedDb.Force()) $"SELECT COALESCE(MAX(rowid),0) FROM {table}" + if v = "" then "0" else v + let pkg = baseline "package_ops" + let br = baseline "branch_ops" + let res = baseline "resolutions" + sqlite + (dbOf inst) + $"INSERT OR REPLACE INTO sync_cursors_v1(peer,kind,cursor) VALUES('{peerUrl}','package_ops',{pkg}),('{peerUrl}','branch_ops',{br}),('{peerUrl}','resolutions',{res})" + |> ignore + +let private author (inst : Instance) (loc : string) (expr : string) : unit = + darkIn inst.dir [ "val"; loc; "="; expr ] |> ignore + +let private commit (inst : Instance) (msg : string) : unit = + darkIn inst.dir [ "commit"; msg; "--yes" ] |> ignore + +let private hashOf (inst : Instance) (loc : string) : string = + (darkIn inst.dir [ "hash"; loc ]).Trim().Split('\n') |> Array.head + +let private viewOf (inst : Instance) (loc : string) : string = + (darkIn inst.dir [ "view"; loc ]).Trim().Split('\n') |> Array.head + +/// Assert a `dark hash` line is a REAL hash, not an empty/error line — so a convergence `Expect.equal` on two +/// instances' hashes can't pass vacuously (both sides printing an identical "not found" banner). +let private assertRealHash (label : string) (h : string) : unit = + Expect.isTrue + (h.Length >= 8) + $"{label}: expected a real (non-empty) hash line, got '{h}'" + let low = h.ToLower() + Expect.isFalse + (low.Contains "error" || low.Contains "not found" || low.Contains "no such") + $"{label}: hash line looks like an error, not a hash: '{h}'" + +// ── scenarios ─────────────────────────────────────────────────────────────────────────────────────── +let private withRoot (name : string) (body : string -> Task) : Task = + task { + let root = + System.IO.Path.Combine("/tmp", $"dark-e2e-{name}-{System.Guid.NewGuid()}") + System.IO.Directory.CreateDirectory root |> ignore + try + do! body root + finally + try + System.IO.Directory.Delete(root, recursive = true) + with _ -> + () + } + +// testSequenced: each scenario spins up real `dark` processes on fixed ports; running them serially avoids +// port contention + the cold-start pile-up a parallel run would cause on a loaded machine. +let private realTests = + testSequenced + <| testList + "SyncE2E" + [ testTask + "basic sync: a committed change pulls over real HTTP and converges (hash + value)" { + do! + withRoot "basic" (fun root -> + task { + let a = mk root "A" + let b = mk root "B" + darkIn a.dir [ "login"; "Ocean" ] |> ignore + darkIn b.dir [ "login"; "Stachu" ] |> ignore + author a "SyncTest.Basic.x" "42" + commit a "add x" + let port = 9310 + let! server = serve a port + try + presync b $"http://127.0.0.1:{port}" + let out = darkIn b.dir [ "sync" ] + Expect.stringContains out "Pulled" "B pulled A's change" + Expect.equal + (viewOf b "SyncTest.Basic.x") + (viewOf a "SyncTest.Basic.x") + "the value converged" + assertRealHash "A's hash" (hashOf a "SyncTest.Basic.x") + Expect.equal + (hashOf b "SyncTest.Basic.x") + (hashOf a "SyncTest.Basic.x") + "the hash converged (the convergence assertion)" + let resync = darkIn b.dir [ "sync" ] + Expect.stringContains + resync + "up to date" + "a second pull is idempotent" + finally + stop server + }) + } + + testTask + "conflict race: concurrent binds record a conflict; keep-mine propagates and converges" { + do! + withRoot "conflict" (fun root -> + task { + let a = mk root "A" + let b = mk root "B" + darkIn a.dir [ "login"; "Ocean" ] |> ignore + darkIn b.dir [ "login"; "Stachu" ] |> ignore + author a "SyncTest.Race.n" "1" + commit a "A=1" + author b "SyncTest.Race.n" "2" + commit b "B=2" + let pA = 9320 + let pB = 9321 + let! serverA = serve a pA + let! serverB = serve b pB + try + presync a $"http://127.0.0.1:{pB}" + presync b $"http://127.0.0.1:{pA}" + darkIn a.dir [ "sync" ] |> ignore + darkIn b.dir [ "sync" ] |> ignore + Expect.stringContains + (darkIn a.dir [ "conflicts" ]) + "SyncTest.Race.n" + "the divergence was recorded + shown (never silent)" + darkIn a.dir [ "conflicts"; "keep-mine"; "SyncTest.Race.n" ] + |> ignore + darkIn b.dir [ "sync" ] |> ignore + assertRealHash + "A's post-resolution hash" + (hashOf a "SyncTest.Race.n") + Expect.equal + (hashOf b "SyncTest.Race.n") + (hashOf a "SyncTest.Race.n") + "B adopts A's resolution → both converge on A's pick" + finally + stop serverA + stop serverB + }) + } + + testTask + "conflict race: keep-theirs adopts the PEER's value (overriding the local LWW winner) + converges" { + do! + withRoot "conflictT" (fun root -> + task { + let a = mk root "A" + let b = mk root "B" + darkIn a.dir [ "login"; "Ocean" ] |> ignore + darkIn b.dir [ "login"; "Stachu" ] |> ignore + // B commits FIRST (earlier stamp = LWW loser), A SECOND (later = LWW winner). So A holds the + // conflict with its own value winning; keep-theirs must flip A to B's losing value — a real + // override, not a no-op that just re-picks the LWW winner. + author b "SyncTest.RaceT.n" "20" + commit b "B=20" + author a "SyncTest.RaceT.n" "10" + commit a "A=10" + let pA = 9322 + let pB = 9323 + let! serverA = serve a pA + let! serverB = serve b pB + try + presync a $"http://127.0.0.1:{pB}" + presync b $"http://127.0.0.1:{pA}" + darkIn a.dir [ "sync" ] |> ignore + darkIn b.dir [ "sync" ] |> ignore + darkIn a.dir [ "conflicts"; "keep-theirs"; "SyncTest.RaceT.n" ] + |> ignore + darkIn b.dir [ "sync" ] |> ignore + assertRealHash + "A's post-keep-theirs hash" + (hashOf a "SyncTest.RaceT.n") + Expect.equal + (hashOf b "SyncTest.RaceT.n") + (hashOf a "SyncTest.RaceT.n") + "both converge on the kept-theirs pick" + Expect.stringContains + (viewOf a "SyncTest.RaceT.n") + "20" + "A adopted B's value (20 = theirs), overriding its own LWW-winning 10" + finally + stop serverA + stop serverB + }) + } + + testTask + "branch sync: a branch created on A appears on B over real HTTP (exercises the branch-op wire)" { + // The other E2E scenarios stay on `main`, so the branch-op JSON wire (BranchOpEvent) isn't otherwise + // exercised over real HTTP. Create a branch on A, sync, and confirm B learns it — end to end through + // the native read builtin → JSON → HTTP → receiveBranchOps. + do! + withRoot "branch" (fun root -> + task { + let a = mk root "A" + let b = mk root "B" + darkIn a.dir [ "login"; "Ocean" ] |> ignore + darkIn b.dir [ "login"; "Stachu" ] |> ignore + darkIn a.dir [ "branch"; "create"; "syncfeature" ] |> ignore + let port = 9330 + let! server = serve a port + try + presync b $"http://127.0.0.1:{port}" + darkIn b.dir [ "sync" ] |> ignore + let branches = darkIn b.dir [ "branch"; "list" ] + Expect.stringContains + branches + "syncfeature" + "the branch A created synced to B over HTTP (the branch-op wire converges)" + finally + stop server + }) + } + + testTask + "offline peer: syncing against an unreachable peer fails honestly + leaves the store intact" { + // Only a real-process/HTTP test can exercise this: connect to a port nobody is serving, then sync. + // The CLI must report the peer is unreachable (never claim success), exit cleanly, and leave the + // local store fully usable (a subsequent `hash` still works). + do! + withRoot "offline" (fun root -> + task { + let b = mk root "B" + darkIn b.dir [ "login"; "Stachu" ] |> ignore + // No server on this port — the peer is "down". `sync pull ` (single peer) surfaces the + // error, unlike bare `sync` which pulls-all and stays quiet about offline peers. + let deadPort = 9339 + let deadUrl = $"http://127.0.0.1:{deadPort}" + presync b deadUrl + let out = (darkIn b.dir [ "sync"; "pull"; deadUrl ]).ToLower() + Expect.isFalse + (out.Contains "pulled") + "it must not claim to have pulled anything from a peer that isn't there" + Expect.isFalse + (out.Contains "up to date") + "it must NOT falsely report 'up to date' when it couldn't even reach the peer" + Expect.isTrue + (out.Contains "reach" + || out.Contains "couldn't" + || out.Contains "unreachable") + "it surfaces that the peer was unreachable" + // The store is unharmed: a normal read-only command still works afterward. + let ver = darkIn b.dir [ "version" ] + Expect.isFalse + (ver = "") + "the CLI + store are still usable after the failed sync" + }) + } ] + +/// A single skipped test carrying `msg` — keeps the "SyncE2E" name in the run without paying any cost. +let private skippedWith (msg : string) = + testList "SyncE2E" [ testCase $"skipped ({msg})" (fun () -> skiptest msg) ] + +let tests = + if not enabled then + skippedWith "set DARK_E2E=1 to run the heavy real-process sync tests" + elif cliExe = "" then + // Enabled but nothing to drive — fail loudly-but-skipped with the fix, not a cryptic Process error. + skippedWith + "DARK_E2E=1 but no Cli exe found under backend/Build/out/Cli/Debug — build it first (dotnet build backend/src/Cli/Cli.fsproj)" + else + realTests diff --git a/backend/tests/Tests/SyncScenarios.Tests.fs b/backend/tests/Tests/SyncScenarios.Tests.fs new file mode 100644 index 0000000000..33506fc87d --- /dev/null +++ b/backend/tests/Tests/SyncScenarios.Tests.fs @@ -0,0 +1,377 @@ +/// Cross-instance SCM + sync scenarios, exercised through the REAL receive path (Seed.receiveOps / +/// receiveBranchOps / Resolutions.receiveResolutions) + the invisible fold — fast, in-process, no CLI. +/// +/// The model: an "instance" IS its op set. Two instances converge iff folding the same op set (in any order, +/// under the origin_ts LWW + the MIN-reconcile on receive) yields the same projection. So the convergence +/// tests here apply an op multiset in different orders and assert an identical `locations` outcome — that +/// order-independence IS the two-instance convergence guarantee. testSequenced + self-cleanup so these ride +/// the shared store safely (they only ever touch their own `Test.*` names/branches). +module Tests.SyncScenarios + +open Expecto + +open System.Threading.Tasks +open FSharp.Control.Tasks + +open Prelude +open Fumble +open LibDB.Sqlite + +module Seed = LibDB.Seed +module Inserts = LibDB.Inserts +module Resolutions = LibDB.Resolutions +module PT = LibExecution.ProgramTypes +module BS = LibSerialization.Binary.Serialization +module Hashing = LibSerialization.Hashing.Hashing + +// ── helpers: build wire events + inspect/reset the projection, all keyed to a test-only name ── + +/// A SetName package-op event tuple, exactly as it crosses the wire / arrives at receiveOps. +let private setNameEvent + (loc : PT.PackageLocation) + (fnHash : string) + (commitHash : string) + (ts : string) + : System.Guid * byte[] * System.Guid * string * string = + let op = PT.PackageOp.SetName(loc, PT.Reference.PackageFn(PT.Hash fnHash)) + let opId = Inserts.computeOpHash op + (opId, BS.PT.PackageOp.serialize opId op, PT.mainBranchId, commitHash, ts) + +let private recv + (event : System.Guid * byte[] * System.Guid * string * string) + : Task = + Seed.receiveOps [] [ event ] + +/// The live binding hash(es) for a location — the thing that must converge. +let private liveHash (loc : PT.PackageLocation) : Task> = + Sql.query + "SELECT item_hash FROM locations WHERE owner = @o AND modules = @m AND name = @n AND unlisted_at IS NULL" + |> Sql.parameters + [ "o", Sql.string loc.owner + "m", Sql.string (String.concat "." loc.modules) + "n", Sql.string loc.name ] + |> Sql.executeAsync (fun read -> read.string "item_hash") + +/// Wipe a test name's ops + projection rows (+ any recorded conflict/resolution) so a scenario can replay it +/// in a different order from a clean slate. +let private wipe + (loc : PT.PackageLocation) + (opIds : List) + : Task = + task { + let modulesStr = String.concat "." loc.modules + for opId in opIds do + do! + Sql.query "DELETE FROM package_ops WHERE id = @id" + |> Sql.parameters [ "id", Sql.uuid opId ] + |> Sql.executeStatementAsync + do! + Sql.query + "DELETE FROM locations WHERE owner = @o AND modules = @m AND name = @n" + |> Sql.parameters + [ "o", Sql.string loc.owner + "m", Sql.string modulesStr + "n", Sql.string loc.name ] + |> Sql.executeStatementAsync + let locStr = $"{loc.owner}.{modulesStr}.{loc.name}" + do! + Sql.query "DELETE FROM sync_conflicts WHERE location = @l" + |> Sql.parameters [ "l", Sql.string locStr ] + |> Sql.executeStatementAsync + do! + Sql.query "DELETE FROM resolutions WHERE location = @l" + |> Sql.parameters [ "l", Sql.string locStr ] + |> Sql.executeStatementAsync + } + +let private twoFns () : Task = + task { + let! hs = + Sql.query "SELECT hash FROM package_functions LIMIT 2" + |> Sql.executeAsync (fun read -> read.string "hash") + match hs with + | a :: b :: _ -> return (a, b) + | _ -> return Exception.raiseInternal "seed needs >=2 functions" [] + } + +let private aCommit () : Task = + Sql.query "SELECT hash FROM commits LIMIT 1" + |> Sql.executeRowAsync (fun read -> read.string "hash") + +/// A BranchOp wire event (id, blob, origin_ts) as it arrives at receiveBranchOps. +let private branchEvent (op : PT.BranchOp) : string * byte[] * string = + let (PT.Hash h) = Hashing.computeBranchOpHash op + (h, BS.PT.BranchOp.serialize h op, "2099-01-01T00:00:00.000Z") + +/// A SetName package event on a SPECIFIC branch (setNameEvent above hardcodes main). +let private setNameEventOn + (loc : PT.PackageLocation) + (fnHash : string) + (branchId : System.Guid) + (commitHash : string) + (ts : string) + : System.Guid * byte[] * System.Guid * string * string = + let op = PT.PackageOp.SetName(loc, PT.Reference.PackageFn(PT.Hash fnHash)) + let opId = Inserts.computeOpHash op + (opId, BS.PT.PackageOp.serialize opId op, branchId, commitHash, ts) + +let tests = + testSequenced + <| testList + "SyncScenarios" + [ // CONVERGENCE — the core guarantee: concurrent edits to the SAME name settle on the same winner no + // matter which instance's op arrives first. (origin_ts LWW: newer wins; older is skipped on replay.) + testTask + "convergence: concurrent SetName to one name is order-independent (LWW)" { + let! (hA, hB) = twoFns () + let! commitHash = aCommit () + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "SyncConv" ]; name = "x" } + let evOld = setNameEvent loc hA commitHash "2099-01-01T00:00:00.100Z" + let evNew = setNameEvent loc hB commitHash "2099-01-01T00:00:00.200Z" + let (idA, _, _, _, _) = evOld + let (idB, _, _, _, _) = evNew + let ids = [ idA; idB ] + + // order 1: old then new + do! wipe loc ids + let! _ = recv evOld + let! _ = recv evNew + let! r1 = liveHash loc + + // order 2: new then old (the older op arrives late — must be skipped, not win) + do! wipe loc ids + let! _ = recv evNew + let! _ = recv evOld + let! r2 = liveHash loc + + Expect.equal r1 [ hB ] "old→new converges to the newer hash" + Expect.equal + r2 + [ hB ] + "new→old ALSO converges to the newer hash (late older op skipped)" + Expect.equal + r1 + r2 + "order-independent — the two-instance convergence property" + + do! wipe loc ids + let! _ = Seed.rebuildProjections () + () + } + + // IDEMPOTENCY — re-receiving the same op set changes nothing and folds 0 (so "Pulled N" stays honest and + // a re-pull can't corrupt the binding). + testTask + "idempotency: re-receiving the same op folds 0 and leaves the binding unchanged" { + let! (hA, _) = twoFns () + let! commitHash = aCommit () + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "SyncIdem" ]; name = "y" } + let ev = setNameEvent loc hA commitHash "2099-01-01T00:00:00.300Z" + let (idA, _, _, _, _) = ev + do! wipe loc [ idA ] + + let! first = recv ev + let! second = recv ev + let! bound = liveHash loc + Expect.isTrue (first >= 1L) "first receive folds the new op" + Expect.equal second 0L "re-receiving the identical op folds nothing" + Expect.equal bound [ hA ] "binding unchanged after the re-pull" + + do! wipe loc [ idA ] + let! _ = Seed.rebuildProjections () + () + } + + // CONFLICT → RESOLUTION → CONVERGE, both directions. A divergence auto-resolves by LWW but is recorded; + // a human override (keep-mine / keep-theirs) mints a Resolution whose overlay wins and converges. + testTask + "conflict → resolution: keep-mine and keep-theirs each override the LWW winner" { + let! (hLocal, hIncoming) = twoFns () + let! commitHash = aCommit () + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "SyncResolve" ]; name = "z" } + let evLocal = setNameEvent loc hLocal commitHash "2099-01-01T00:00:00.100Z" + let evIncoming = + setNameEvent loc hIncoming commitHash "2099-01-01T00:00:00.200Z" + let (idL, _, _, _, _) = evLocal + let (idI, _, _, _, _) = evIncoming + + let applyResolution (choiceHash : string) (at : string) : Task = + Resolutions.recordAndApply + { id = System.Guid.NewGuid() |> string + branchId = PT.mainBranchId + location = loc + choice = PT.Reference.PackageFn(PT.Hash choiceHash) + resolvedBy = "human" + at = at } + + // set up the divergence: local hLocal@100, then incoming hIncoming@200 → LWW binds incoming + do! wipe loc [ idL; idI ] + let! _ = recv evLocal + let! _ = recv evIncoming + let! lww = liveHash loc + Expect.equal lww [ hIncoming ] "LWW binds the newer incoming hash" + + // keep-MINE: override back to the local hash with a fresh (newer) stamp → converges to local + do! applyResolution hLocal "2099-01-01T00:00:00.300Z" + let! kept = liveHash loc + Expect.equal + kept + [ hLocal ] + "keep-mine: the resolution overrides LWW back to the local hash" + + // keep-THEIRS: a later resolution back to incoming wins (last-resolver by `at`) + do! applyResolution hIncoming "2099-01-01T00:00:00.400Z" + let! flipped = liveHash loc + Expect.equal + flipped + [ hIncoming ] + "keep-theirs: a newer resolution flips it back to incoming" + + do! wipe loc [ idL; idI ] + let! _ = Seed.rebuildProjections () + () + } + + // NO PHANTOM CONFLICTS on re-pull: a divergence is recorded once (when the rebind actually folds); + // re-receiving an already-applied op must NOT record it again (detection only fires on ops about to fold). + testTask "re-pulling an already-applied op records no phantom conflict" { + let! (hLocal, hIncoming) = twoFns () + let! commitHash = aCommit () + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "SyncPhantom" ]; name = "p" } + let evLocal = setNameEvent loc hLocal commitHash "2099-01-01T00:00:00.100Z" + let evIncoming = + setNameEvent loc hIncoming commitHash "2099-01-01T00:00:00.200Z" + let (idL, _, _, _, _) = evLocal + let (idI, _, _, _, _) = evIncoming + + let conflictCount () : Task = + Sql.query "SELECT count(*) AS n FROM sync_conflicts WHERE location = @l" + |> Sql.parameters [ "l", Sql.string "Test.SyncPhantom.p" ] + |> Sql.executeRowAsync (fun read -> read.int64 "n") + + do! wipe loc [ idL; idI ] + let! _ = recv evLocal + let! _ = recv evIncoming // the rebind folds → one divergence recorded + let! afterDivergence = conflictCount () + Expect.equal afterDivergence 1L "the rebind records exactly one divergence" + + // re-pull the now-superseded local op — already applied, so detection must NOT re-fire + let! _ = recv evLocal + let! afterRepull = conflictCount () + Expect.equal + afterRepull + 1L + "re-pulling the already-applied op records no new (phantom) conflict" + + do! wipe loc [ idL; idI ] + let! _ = Seed.rebuildProjections () + () + } + + // PAGINATION / CURSOR RESUME — the serve read (eventsSince) returns one bounded batch and a resume + // cursor; the next read after that cursor is the next batch, disjoint (so a puller loops to catch up and + // an interrupted pull resumes where it stopped). + testTask + "eventsSince paginates: bounded batches, cursor advances, batches disjoint" { + let! (_, events1, cur1) = Seed.eventsSince 0L 3L + Expect.isTrue + (List.length events1 <= 3) + "first batch is bounded to the limit" + Expect.isTrue + (List.length events1 > 0) + "first batch non-empty (the seed has committed ops)" + + let! (_, events2, cur2) = Seed.eventsSince cur1 3L + Expect.isTrue (cur2 >= cur1) "the resume cursor advances monotonically" + + let idsOf evs = evs |> List.map (fun (id, _, _, _, _) -> id) |> Set.ofList + Expect.isTrue + (Set.intersect (idsOf events1) (idsOf events2) |> Set.isEmpty) + "consecutive batches are disjoint — the cursor prevents re-reading" + } + + // BRANCH SCM SYNC — branch structure (branch_ops) applies before content, so a package op on a + // freshly-synced branch resolves its branch_id and folds; and a merge marks the branch merged. + testTask + "branch sync: structure lands, content on the new branch folds, merge marks it" { + let! fnHash = + Sql.query "SELECT hash FROM package_functions LIMIT 1" + |> Sql.executeRowAsync (fun read -> read.string "hash") + let! baseCommit = aCommit () + let branchId = System.Guid "dead0000-0000-0000-0000-0000000b0b00" + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "BranchSync" ]; name = "onbranch" } + + let createB = + branchEvent ( + PT.BranchOp.CreateBranch( + branchId, + "test-sync-branch", + Some PT.mainBranchId, + Some(PT.Hash baseCommit) + ) + ) + let mergeB = branchEvent (PT.BranchOp.MergeBranch(branchId, PT.mainBranchId)) + let pkgEv = + setNameEventOn loc fnHash branchId baseCommit "2099-01-01T00:00:00.500Z" + + let cleanup () : Task = + task { + do! + Sql.query "DELETE FROM locations WHERE branch_id = @b" + |> Sql.parameters [ "b", Sql.uuid branchId ] + |> Sql.executeStatementAsync + do! + Sql.query "DELETE FROM package_ops WHERE branch_id = @b" + |> Sql.parameters [ "b", Sql.uuid branchId ] + |> Sql.executeStatementAsync + do! + Sql.query "DELETE FROM branches WHERE id = @b" + |> Sql.parameters [ "b", Sql.uuid branchId ] + |> Sql.executeStatementAsync + do! + Sql.query "DELETE FROM branch_ops WHERE id = @c OR id = @m" + |> Sql.parameters + [ "c", Sql.string (let (i, _, _) = createB in i) + "m", Sql.string (let (i, _, _) = mergeB in i) ] + |> Sql.executeStatementAsync + } + + do! cleanup () + + // structure first: the branch lands + let! _ = Seed.receiveBranchOps [ createB ] + let! branchExists = + Sql.query "SELECT count(*) AS n FROM branches WHERE id = @b" + |> Sql.parameters [ "b", Sql.uuid branchId ] + |> Sql.executeRowAsync (fun read -> read.int64 "n") + Expect.equal branchExists 1L "CreateBranch synced — the branch exists" + + // content on the new branch folds — branch_id resolves because structure came first + let! _ = Seed.receiveOps [] [ pkgEv ] + let! bound = + Sql.query + "SELECT item_hash FROM locations WHERE branch_id = @b AND name = 'onbranch' AND unlisted_at IS NULL" + |> Sql.parameters [ "b", Sql.uuid branchId ] + |> Sql.executeAsync (fun read -> read.string "item_hash") + Expect.equal + bound + [ fnHash ] + "a package op on the synced branch folded into locations under that branch" + + // merge marks it merged + let! _ = Seed.receiveBranchOps [ mergeB ] + let! mergedAt = + Sql.query "SELECT merged_at FROM branches WHERE id = @b" + |> Sql.parameters [ "b", Sql.uuid branchId ] + |> Sql.executeRowAsync (fun read -> read.stringOrNone "merged_at") + Expect.isSome mergedAt "MergeBranch marked the branch merged_at" + + do! cleanup () + let! _ = Seed.rebuildProjections () + () + } ] diff --git a/backend/tests/Tests/Tests.fs b/backend/tests/Tests/Tests.fs index 163ef65f0f..9fee97aaa2 100644 --- a/backend/tests/Tests/Tests.fs +++ b/backend/tests/Tests/Tests.fs @@ -59,8 +59,14 @@ let main (args : string array) : int = Tests.LibExecution.tests.Force() Tests.Blob.tests + Tests.OpsProjections.tests + Tests.SyncScenarios.tests + Tests.MultiInstance.tests + Tests.SyncE2E.tests + Tests.Releases.tests Tests.Stream.tests - Tests.Capabilities.tests ] + Tests.Capabilities.tests + Tests.AlphaNormalize.tests ] let cancelationTokenSource = new System.Threading.CancellationTokenSource() let httpClientTestsTask = Tests.HttpClient.init cancelationTokenSource.Token diff --git a/backend/tests/Tests/Tests.fsproj b/backend/tests/Tests/Tests.fsproj index 34a0be744a..6c31f0ec15 100644 --- a/backend/tests/Tests/Tests.fsproj +++ b/backend/tests/Tests/Tests.fsproj @@ -38,6 +38,7 @@ + @@ -51,6 +52,11 @@ + + + + + From d6121c2b412ccedbe3e92545946c8b7c828c9720 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Sun, 12 Jul 2026 13:11:06 -0400 Subject: [PATCH 005/172] Fix `dark view`: syntaxHighlighting called a nonexistent List.collect MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit `Stdlib.List.collect` isn't a function (never defined, not a builtin), but `cli/utils/syntaxHighlighting.dark` calls it at two sites — so every `dark view` (which highlights its output) errored with "List.collect not found". Replace each `|> List.collect f` with `|> List.map f |> List.flatten` (the same semantics). Unrelated to sync — it's a pre-existing regression on main surfaced by rebasing onto it; folded here so this branch builds green. Co-Authored-By: Claude Opus 4.8 --- packages/darklang/cli/utils/syntaxHighlighting.dark | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/packages/darklang/cli/utils/syntaxHighlighting.dark b/packages/darklang/cli/utils/syntaxHighlighting.dark index 7e5a0099ed..ade2ce8133 100644 --- a/packages/darklang/cli/utils/syntaxHighlighting.dark +++ b/packages/darklang/cli/utils/syntaxHighlighting.dark @@ -30,9 +30,10 @@ let tokenTypeToCliColor (tokenType: LanguageTools.SemanticTokens.TokenType) : St let highlightLine (line: String) (lineTokens: List) : String = let insertions = lineTokens - |> Stdlib.List.collect (fun token -> + |> Stdlib.List.map (fun token -> [ (token.range.start.column, tokenTypeToCliColor token.tokenType) (token.range.end_.column, Colors.reset) ]) + |> Stdlib.List.flatten // stable sort keeps a token's end before the next token's start at a shared // column, so adjacent tokens render as `…reset…` |> Stdlib.List.sortBy (fun (pos, _) -> pos) @@ -96,7 +97,8 @@ let applyTokenColors // each line below sees only single-line tokens let sortedTokens = tokens - |> Stdlib.List.collect (splitTokenByLine lines) + |> Stdlib.List.map (splitTokenByLine lines) + |> Stdlib.List.flatten |> Stdlib.List.sortBy (fun token -> (token.range.start.row, token.range.start.column)) lines From 41d7c3e6d2b0204019f655dea5448ace8a3246d3 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Sun, 12 Jul 2026 21:52:58 -0400 Subject: [PATCH 006/172] Sync: use Feriel throughout; drop the redundant Ocean account MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Feriel (account …0004) is the collaborator persona. schema.sql seeded an extra 'Ocean' account (…0005) that duplicated her — removed it, and moved the four SyncE2E `login Ocean` calls to `login Feriel` so they still resolve. Example peer URLs `ocean.tailnet` → `feriel.tailnet`. Prep for real two-machine testing (Stachu + Feriel). Full suite + DARK_E2E green (9,956/0). Co-Authored-By: Claude Opus 4.8 --- backend/migrations/schema.sql | 3 +-- backend/tests/Tests/SyncE2E.Tests.fs | 8 ++++---- packages/darklang/cli/sync.dark | 2 +- packages/darklang/sync.dark | 2 +- 4 files changed, 7 insertions(+), 8 deletions(-) diff --git a/backend/migrations/schema.sql b/backend/migrations/schema.sql index ceb980b3de..a5661c0a67 100644 --- a/backend/migrations/schema.sql +++ b/backend/migrations/schema.sql @@ -40,8 +40,7 @@ INSERT OR IGNORE INTO accounts_v0 (id, name) VALUES ('00000000-0000-0000-0000-000000000001', 'Darklang'), ('00000000-0000-0000-0000-000000000002', 'Stachu'), ('00000000-0000-0000-0000-000000000003', 'Paul'), - ('00000000-0000-0000-0000-000000000004', 'Feriel'), - ('00000000-0000-0000-0000-000000000005', 'Ocean'); + ('00000000-0000-0000-0000-000000000004', 'Feriel'); -------------------- diff --git a/backend/tests/Tests/SyncE2E.Tests.fs b/backend/tests/Tests/SyncE2E.Tests.fs index dc639cb5e2..fb4da4dd98 100644 --- a/backend/tests/Tests/SyncE2E.Tests.fs +++ b/backend/tests/Tests/SyncE2E.Tests.fs @@ -237,7 +237,7 @@ let private realTests = task { let a = mk root "A" let b = mk root "B" - darkIn a.dir [ "login"; "Ocean" ] |> ignore + darkIn a.dir [ "login"; "Feriel" ] |> ignore darkIn b.dir [ "login"; "Stachu" ] |> ignore author a "SyncTest.Basic.x" "42" commit a "add x" @@ -273,7 +273,7 @@ let private realTests = task { let a = mk root "A" let b = mk root "B" - darkIn a.dir [ "login"; "Ocean" ] |> ignore + darkIn a.dir [ "login"; "Feriel" ] |> ignore darkIn b.dir [ "login"; "Stachu" ] |> ignore author a "SyncTest.Race.n" "1" commit a "A=1" @@ -315,7 +315,7 @@ let private realTests = task { let a = mk root "A" let b = mk root "B" - darkIn a.dir [ "login"; "Ocean" ] |> ignore + darkIn a.dir [ "login"; "Feriel" ] |> ignore darkIn b.dir [ "login"; "Stachu" ] |> ignore // B commits FIRST (earlier stamp = LWW loser), A SECOND (later = LWW winner). So A holds the // conflict with its own value winning; keep-theirs must flip A to B's losing value — a real @@ -363,7 +363,7 @@ let private realTests = task { let a = mk root "A" let b = mk root "B" - darkIn a.dir [ "login"; "Ocean" ] |> ignore + darkIn a.dir [ "login"; "Feriel" ] |> ignore darkIn b.dir [ "login"; "Stachu" ] |> ignore darkIn a.dir [ "branch"; "create"; "syncfeature" ] |> ignore let port = 9330 diff --git a/packages/darklang/cli/sync.dark b/packages/darklang/cli/sync.dark index 7b3c1a7686..19f0cc2998 100644 --- a/packages/darklang/cli/sync.dark +++ b/packages/darklang/cli/sync.dark @@ -236,7 +236,7 @@ let help (state: AppState) : AppState = "Local-first: sync is opt-in, and once you connect a peer it stays current." "" " dark sync pull now from every instance you're connected to" - " dark sync connect start syncing with an instance (e.g. http://ocean.tailnet:9000)" + " dark sync connect start syncing with an instance (e.g. http://feriel.tailnet:9000)" " dark sync disconnect stop syncing with an instance" " dark sync serve let peers pull from you (add --port N; default 9000)" " dark sync status who you're syncing with, and how current each is" diff --git a/packages/darklang/sync.dark b/packages/darklang/sync.dark index 9b82b48aad..462d58f205 100644 --- a/packages/darklang/sync.dark +++ b/packages/darklang/sync.dark @@ -83,7 +83,7 @@ let peers () : List = // The one message for "that's not a peer" — a peer is always an http(s) URL (a running instance), never a // file. Shared by connect + pull so both reject a `.db`/path identically. let private peerMustBeUrl : String = - "A peer is a URL like http://ocean.tailnet:9000 — sync exchanges ops with a running instance over HTTP, not a .db file." + "A peer is a URL like http://feriel.tailnet:9000 — sync exchanges ops with a running instance over HTTP, not a .db file." /// Connect a peer by its URL. Sync talks to running instances over HTTP — a `.db` file is not a peer. let connect (url: String) : Stdlib.Result.Result = From 33dffb03cce4c99729541c76f1ea33dd86580154 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Sun, 12 Jul 2026 22:26:56 -0400 Subject: [PATCH 007/172] Seed: strip execution traces from the exported seed MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit export-seed dropped projections but kept `trace_fn_calls`/`traces` — dev run telemetry that ballooned the seed (268 MB of a 305 MB store) and thus every shipped CLI. Strip them: seed 305 MB → 35 MB, gzip → exe far smaller. Traces are never part of a seed's canon. Co-Authored-By: Claude Opus 4.8 --- backend/src/LibDB/Seed.fs | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/backend/src/LibDB/Seed.fs b/backend/src/LibDB/Seed.fs index 830d598668..524160851a 100644 --- a/backend/src/LibDB/Seed.fs +++ b/backend/src/LibDB/Seed.fs @@ -87,6 +87,11 @@ let export (outputPath : string) : Task = SELECT id FROM branches WHERE archived_at IS NOT NULL); DELETE FROM branches WHERE archived_at IS NOT NULL; + -- Execution traces are dev telemetry, never part of a seed. Leaving them in bloats the shipped seed + -- (trace_fn_calls alone was 268 MB of a 305 MB dev store); strip them so the seed is just canon. + DELETE FROM trace_fn_calls; + DELETE FROM traces; + UPDATE package_ops SET applied = 0; UPDATE branch_ops SET applied = 1; """ From 5273427320d94b489a27eb99b996be59ed697e00 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Sun, 12 Jul 2026 22:42:30 -0400 Subject: [PATCH 008/172] CLI: store login config next to the store, not CWD-relative MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The config path in portable mode was the relative string "rundir/cli-config.json" — resolved against the process CWD. A released exe runs from wherever the user is (e.g. $HOME), which has no rundir/, so `login` printed "Logged in" but persisted nothing, and the next `commit` said "Not logged in". Anchor the config to the store's own directory (dirname of localDbPath) — absolute, always-present, CWD-independent, and identical to today's path for the dev CLI and installed mode. SyncE2E's now-needless rundir/ setup dropped; suite green (5/5 E2E). Co-Authored-By: Claude Opus 4.8 --- backend/tests/Tests/SyncE2E.Tests.fs | 7 ++----- packages/darklang/cli/config.dark | 14 +++++++------- 2 files changed, 9 insertions(+), 12 deletions(-) diff --git a/backend/tests/Tests/SyncE2E.Tests.fs b/backend/tests/Tests/SyncE2E.Tests.fs index fb4da4dd98..ad07f29d0e 100644 --- a/backend/tests/Tests/SyncE2E.Tests.fs +++ b/backend/tests/Tests/SyncE2E.Tests.fs @@ -113,11 +113,8 @@ let private mk (root : string) (name : string) : Instance = let dir = System.IO.Path.Combine(root, name) System.IO.Directory.CreateDirectory(System.IO.Path.Combine(dir, "logs")) |> ignore - // The CLI stores its login/session config at `/rundir/cli-config.json` (a path relative to the - // process's working directory — which we set to this instance dir). Create that subdir so `login` - // persists and later `commit` processes see a logged-in user — and so each instance's login is isolated. - System.IO.Directory.CreateDirectory(System.IO.Path.Combine(dir, "rundir")) - |> ignore + // The CLI stores its login/session config next to this instance's store (`/cli-config.json`), so + // `login` persists here and a later `commit` process sees the logged-in user — each instance isolated. System.IO.File.Copy( seedDb.Force(), System.IO.Path.Combine(dir, "data.db"), diff --git a/packages/darklang/cli/config.dark b/packages/darklang/cli/config.dark index 72f20b783e..547f0ca0a8 100644 --- a/packages/darklang/cli/config.dark +++ b/packages/darklang/cli/config.dark @@ -1,13 +1,13 @@ module Darklang.Cli.Config -// Config file path - uses rundir/ in portable mode, ~/.darklang/ when installed +// The config lives next to this instance's store (`localDbPath`), so the path is absolute and its directory +// always exists — independent of the process CWD and of install mode. (The old portable path, +// "rundir/cli-config.json", was CWD-relative: `login` silently no-op'd — printed "Logged in" but persisted +// nothing — whenever the CLI ran from a directory without a `rundir/` subdir, e.g. a released exe run from $HOME.) let configFilePath () : String = - match Installation.System.getInstallationMode () with - | Portable -> "rundir/cli-config.json" - | Installed -> - let host = (Stdlib.Cli.Host.getRuntimeHost ()) |> Builtin.unwrap - let darklangHomeDir = Installation.Config.getDarklangHomeDir host - $"{darklangHomeDir}/cli-config.json" + let dbPath = Builtin.localDbPath () + let dir = Stdlib.String.join (Stdlib.List.dropLast (Stdlib.String.split dbPath "/")) "/" + $"{dir}/cli-config.json" // Read config from disk let readConfig () : Dict = From e97ac29a94ae78a7254b717ae989ebcbcae86018 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Sun, 12 Jul 2026 22:59:36 -0400 Subject: [PATCH 009/172] Sync: a resolved conflict clears on the peer too, not just the resolver MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit A keep-mine/keep-theirs override mints a synced Resolution that converges the value everywhere — but the peer that independently recorded the same divergence kept showing "1 unreviewed conflict" (value said 100, its conflict record still pointed at the stale LWW winner). recordAndApply now marks any auto-resolved conflict at the location overridden, so applying a resolution (local OR synced-in) settles the review log on every instance. Found on real two-machine testing (pop-os + framey). Co-Authored-By: Claude Opus 4.8 --- backend/src/LibDB/Conflicts.fs | 13 +++++++++++++ backend/src/LibDB/Resolutions.fs | 3 +++ 2 files changed, 16 insertions(+) diff --git a/backend/src/LibDB/Conflicts.fs b/backend/src/LibDB/Conflicts.fs index af7eb3c7dd..cf687e0268 100644 --- a/backend/src/LibDB/Conflicts.fs +++ b/backend/src/LibDB/Conflicts.fs @@ -124,6 +124,19 @@ let markOverridden (id : string) : Task = |> Sql.parameters [ "id", Sql.string id ] |> Sql.executeStatementAsync +/// Mark any auto-resolved conflict at this location overridden. Used when a Resolution is applied (local OR +/// synced-in from a peer): the override converges the effective value, so the divergence is settled — a peer +/// that independently recorded the same conflict must stop listing it as unreviewed. +let markOverriddenByLocation + (branchId : System.Guid) + (location : string) + : Task = + Sql.query + "UPDATE sync_conflicts SET status = 'overridden' WHERE branch_id = @branch_id AND location = @location AND status = 'auto-resolved'" + |> Sql.parameters + [ "branch_id", Sql.string (string branchId); "location", Sql.string location ] + |> Sql.executeStatementAsync + /// The current live binding (item_hash, origin_ts) for a location on a branch, if any. let private currentBinding (branchId : System.Guid) diff --git a/backend/src/LibDB/Resolutions.fs b/backend/src/LibDB/Resolutions.fs index 515bdab0ea..97ce3b1b99 100644 --- a/backend/src/LibDB/Resolutions.fs +++ b/backend/src/LibDB/Resolutions.fs @@ -150,6 +150,9 @@ let recordAndApply (r : Resolution) : Task = task { do! record r do! applyToLocations r + // The override settled this location — clear any conflict recorded here (on THIS instance, and on a peer + // that received the resolution), so it stops showing as an unreviewed conflict after it's been resolved. + do! Conflicts.markOverriddenByLocation r.branchId (Conflicts.locationString r.location) } /// Replay EVERY stored resolution (ordered by `at`) onto the `locations` projection — the overlay half of From 136558698fe394fa32bd0b119d4fd18e201d8c20 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Sun, 12 Jul 2026 23:05:05 -0400 Subject: [PATCH 010/172] CLI: conflict list shows what each side set the name to, inline MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit `dark conflicts` listed only hashes — you couldn't tell what actually diverged without running `show` on each. Now each conflict previews both values inline: Stachu.Demo.clash (value) yours 111 · theirs 222 → theirs active (auto:last-writer-wins) For a value it drops the redundant "val =" and shows just the body; fns/types show the trimmed signature. See the divergence at a glance. Co-Authored-By: Claude Opus 4.8 --- packages/darklang/cli/conflicts.dark | 30 ++++++++++++++++++++++++++-- 1 file changed, 28 insertions(+), 2 deletions(-) diff --git a/packages/darklang/cli/conflicts.dark b/packages/darklang/cli/conflicts.dark index d21962f773..68b2c67dd0 100644 --- a/packages/darklang/cli/conflicts.dark +++ b/packages/darklang/cli/conflicts.dark @@ -86,6 +86,26 @@ let private renderContent Stdlib.String.join indentedLines "\n" | None -> $" <{short hashStr}> (content unavailable)" +// A one-line preview of a candidate — for the conflict LIST, so you see WHAT each side set the name to at a +// glance ("111" vs "222") without running `show`. For a value it drops the redundant "val =" prefix and +// shows just the body; for a fn/type it shows the trimmed first line (the signature). +let private renderInline + (branchId: Uuid) + (itemKind: String) + (hashStr: String) + : String = + let full = renderContent branchId itemKind hashStr + let firstLine = + match + Stdlib.List.filter (Stdlib.String.split full "\n") (fun s -> + (Stdlib.String.trim s) != "") + with + | first :: _ -> Stdlib.String.trim first + | [] -> $"<{short hashStr}>" + match Stdlib.String.split firstLine " = " with + | [ lhs; rhs ] -> if rhs == "" then lhs else rhs + | _ -> firstLine + let help (state: AppState) : AppState = Stdlib.printLine "dark conflicts — review + resolve sync divergences" Stdlib.printLine "" @@ -109,12 +129,18 @@ let execute (state: AppState) (args: List) : AppState = let noun = if n == 1 then "conflict" else "conflicts" Stdlib.printLine $"{Stdlib.Int.toString n} unreviewed {noun}:" + let branchId = state.currentBranchId Stdlib.List.iter cs (fun c -> - let kept = + let yoursV = renderInline branchId c.itemKind c.localHash + let theirsV = renderInline branchId c.itemKind c.incomingHash + let activeSide = if c.chosenHash == c.incomingHash then "theirs" else "yours" + Stdlib.printLine $" {c.location} ({c.itemKind})" + Stdlib.printLine - $" {c.location} active: {short c.chosenHash} ({kept}, {c.resolvedBy}) yours: {short c.localHash} · theirs: {short c.incomingHash}") + (Colors.hint + $" yours {yoursV} · theirs {theirsV} → {activeSide} active ({c.resolvedBy})")) Stdlib.printLine ( Colors.hint From cc1ba001a599525e209942963379fc6d44fd4a0b Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Sun, 12 Jul 2026 23:47:39 -0400 Subject: [PATCH 011/172] cli: exit interactive views cleanly when stdin isn't a TTY MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit A full-screen view (apps, outliner, CLI views) launched with stdin redirected — from a script, a pipe, or a daemon — crashed with a raw InvalidOperation_ConsoleReadKeyOnFile stack dump: Console.ReadKey and Console.KeyAvailable both throw when input isn't a console. Detect redirected input in readKeyOrPaste and report Escape, which every view already treats as "exit", so it closes cleanly instead of blowing up. Co-Authored-By: Claude Opus 4.8 --- backend/src/Builtins/Builtins.Cli/Libs/Stdin.fs | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/backend/src/Builtins/Builtins.Cli/Libs/Stdin.fs b/backend/src/Builtins/Builtins.Cli/Libs/Stdin.fs index 6e6fa9c2a5..d1c8df2906 100644 --- a/backend/src/Builtins/Builtins.Cli/Libs/Stdin.fs +++ b/backend/src/Builtins/Builtins.Cli/Libs/Stdin.fs @@ -35,6 +35,16 @@ let private readKeyOrPaste () : ConsoleKeyInfo * string option = let isPrintable (k : ConsoleKeyInfo) = k.KeyChar <> '\u0000' && not (Char.IsControl k.KeyChar) + // No interactive console (stdin redirected / not a TTY — e.g. an interactive + // view launched from a script, a pipe, or a daemon). `Console.ReadKey` and + // `Console.KeyAvailable` both throw InvalidOperation_ConsoleReadKeyOnFile here, + // which would crash a TUI's key loop with a raw stack dump. Report Escape + // instead — every full-screen view treats it as "exit" — so the view closes + // cleanly rather than blowing up. + if Console.IsInputRedirected then + (ConsoleKeyInfo('\u001b', ConsoleKey.Escape, false, false, false), None) + else + let first = Console.ReadKey true if not Console.KeyAvailable then (first, None) From 0ba86a2c86dc1782b639bfe96b840b80fd648ba7 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 00:01:31 -0400 Subject: [PATCH 012/172] cli: conflict list/show renders the differing BODY with real names MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The inline conflict preview showed the item's SIGNATURE (identical on both sides) instead of its BODY (where the two versions actually differ), so a fn/type conflict looked the same on both sides. And the non-active candidate rendered its own name as "" — a name isn't part of an item's content-addressed hash, so the pretty-printer can't resolve it from the (superseded) binding. renderInline now shows the definition body (the part after the first " = "), collapsed to one line and truncated — so you see "Hello," vs "Hey there," at a glance. renderContent restores the real leaf name (known from the conflict's location) over the placeholder, so `show` reads cleanly for fns and types too. Co-Authored-By: Claude Opus 4.8 --- packages/darklang/cli/conflicts.dark | 61 ++++++++++++++++++++-------- 1 file changed, 43 insertions(+), 18 deletions(-) diff --git a/packages/darklang/cli/conflicts.dark b/packages/darklang/cli/conflicts.dark index 68b2c67dd0..bcbe136225 100644 --- a/packages/darklang/cli/conflicts.dark +++ b/packages/darklang/cli/conflicts.dark @@ -34,6 +34,12 @@ let private conflicts () : List = let private short (h: String) : String = Stdlib.String.slice h 0 8 +// The leaf name of a location ("Stachu.Lib.greet" -> "greet"). +let private leafName (location: String) : String = + match Stdlib.List.last (Stdlib.String.split location ".") with + | Some n -> n + | None -> location + let private unreviewed () : List = Stdlib.List.filter (conflicts ()) (fun c -> c.status == "auto-resolved") @@ -53,6 +59,7 @@ let private keep (location: String) (hash: String) : Bool = // if a version somehow can't be loaded. let private renderContent (branchId: Uuid) + (location: String) (itemKind: String) (hashStr: String) : String = @@ -81,30 +88,48 @@ let private renderContent | _ -> Stdlib.Option.Option.None match rendered with | Some src -> + // A name isn't part of an item's content-addressed hash — the pretty-printer + // resolves it from the live binding. The NON-ACTIVE candidate's hash has no + // live binding, so it renders the item's own name as "". We know + // the real name (the conflict's location), so restore it for a readable diff. + let restored = + Stdlib.String.replaceAll + src + $"" + (leafName location) let indentedLines = - Stdlib.List.map (Stdlib.String.split src "\n") (fun line -> $" {line}") + Stdlib.List.map (Stdlib.String.split restored "\n") (fun line -> $" {line}") Stdlib.String.join indentedLines "\n" | None -> $" <{short hashStr}> (content unavailable)" // A one-line preview of a candidate — for the conflict LIST, so you see WHAT each side set the name to at a -// glance ("111" vs "222") without running `show`. For a value it drops the redundant "val =" prefix and -// shows just the body; for a fn/type it shows the trimmed first line (the signature). +// glance without running `show`. It shows the DEFINITION BODY (the part after the first " = "): for a value +// that's the expression ("111"), for a fn the body ("(\"Hello, \") ++ name"), for a type the shape +// ("{ x: Int; y: Int }"). The name/signature is dropped — it's the same on both sides (and shown in the list +// header), so the body is the only thing that actually differs. Collapsed to one line and truncated to fit. let private renderInline (branchId: Uuid) + (location: String) (itemKind: String) (hashStr: String) : String = - let full = renderContent branchId itemKind hashStr - let firstLine = - match - Stdlib.List.filter (Stdlib.String.split full "\n") (fun s -> - (Stdlib.String.trim s) != "") - with - | first :: _ -> Stdlib.String.trim first - | [] -> $"<{short hashStr}>" - match Stdlib.String.split firstLine " = " with - | [ lhs; rhs ] -> if rhs == "" then lhs else rhs - | _ -> firstLine + // Collapse the (indented, possibly multi-line) render to a single trimmed line. + let oneLine = + Stdlib.String.split (renderContent branchId location itemKind hashStr) "\n" + |> Stdlib.List.map (fun s -> Stdlib.String.trim s) + |> Stdlib.List.filter (fun s -> s != "") + |> Stdlib.String.join " " + // Everything after the first " = " is the body (rejoin so a body containing " = " survives). + let body = + match Stdlib.String.split oneLine " = " with + | [] -> oneLine + | [ _ ] -> oneLine + | _ :: rest -> Stdlib.String.join rest " = " + let body = Stdlib.String.trim body + if Stdlib.String.length body > 56 then + (Stdlib.String.slice body 0 56) ++ "…" + else + body let help (state: AppState) : AppState = Stdlib.printLine "dark conflicts — review + resolve sync divergences" @@ -131,8 +156,8 @@ let execute (state: AppState) (args: List) : AppState = let branchId = state.currentBranchId Stdlib.List.iter cs (fun c -> - let yoursV = renderInline branchId c.itemKind c.localHash - let theirsV = renderInline branchId c.itemKind c.incomingHash + let yoursV = renderInline branchId c.location c.itemKind c.localHash + let theirsV = renderInline branchId c.location c.itemKind c.incomingHash let activeSide = if c.chosenHash == c.incomingHash then "theirs" else "yours" @@ -160,10 +185,10 @@ let execute (state: AppState) (args: List) : AppState = Stdlib.printLine $"{c.location} — two versions ({c.itemKind}):" Stdlib.printLine "" Stdlib.printLine $" yours {short c.localHash}{yoursActive}" - Stdlib.printLine (renderContent branchId c.itemKind c.localHash) + Stdlib.printLine (renderContent branchId c.location c.itemKind c.localHash) Stdlib.printLine "" Stdlib.printLine $" theirs {short c.incomingHash}{theirsActive}" - Stdlib.printLine (renderContent branchId c.itemKind c.incomingHash) + Stdlib.printLine (renderContent branchId c.location c.itemKind c.incomingHash) Stdlib.printLine "" Stdlib.printLine ( From 3232aa6842846667ff9e5647c95ada275b9f825a Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 00:20:53 -0400 Subject: [PATCH 013/172] sync: re-apply resolution overlay after the incremental fold (fix divergence) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit A synced-in 'keep theirs'/'keep mine' resolution was silently reverted on the next grow, so two peers that agreed via a resolution DIVERGED. Effective binding = fold(package_ops)[LWW] -> then apply resolutions. The full rebuild path (rebuildProjections) already re-applied the overlay after re-folding, but growIfNeeded — the incremental fold that runs when a pull brings new ops — folded them by LWW and never re-applied resolutions. So a 'keep theirs' that a peer synced in was clobbered by the very op it was meant to override the moment the next command triggered a grow: the binding reverted to the LWW loser while the deciding peer stayed on the chosen version. Repro: A and B both author name N differently; B keep-theirs -> B converges; A pulls B's resolution -> A momentarily converges, then a grow reverts A to the LWW winner. A=X, B=Y, stuck. Fix: growIfNeeded re-applies Resolutions.reapplyAll after the fold when it applied new ops, symmetric with rebuildProjections. Also mark the conflict 'overridden' in reapplyAll (mirrors recordAndApply) so the resolved divergence doesn't pop back up as unreviewed in `dark conflicts` after a grow. Co-Authored-By: Claude Opus 4.8 --- backend/src/LibDB/Resolutions.fs | 5 +++++ backend/src/LibDB/Seed.fs | 8 ++++++++ 2 files changed, 13 insertions(+) diff --git a/backend/src/LibDB/Resolutions.fs b/backend/src/LibDB/Resolutions.fs index 97ce3b1b99..dc797ae862 100644 --- a/backend/src/LibDB/Resolutions.fs +++ b/backend/src/LibDB/Resolutions.fs @@ -177,6 +177,11 @@ let reapplyAll () : Task = at = read.string "at" }) for r in rows do do! applyToLocations r + // Keep the conflict log consistent with the overlay: a location that carries a resolution is settled, so + // its recorded divergence is 'overridden', not a still-open 'auto-resolved'. (recordAndApply does this on + // the live path; a re-fold that goes through reapplyAll must do it too, or the resolved conflict pops back + // up as unreviewed in `dark conflicts` after a grow.) + do! Conflicts.markOverriddenByLocation r.branchId (Conflicts.locationString r.location) } diff --git a/backend/src/LibDB/Seed.fs b/backend/src/LibDB/Seed.fs index 524160851a..f5f0fc8bc3 100644 --- a/backend/src/LibDB/Seed.fs +++ b/backend/src/LibDB/Seed.fs @@ -639,6 +639,14 @@ let growIfNeeded if appliedCount > 0L then log $"Growing package DB from ops ({appliedCount} ops to apply)..." Telemetry.event "seed.applyOps.count" [ ("count", string appliedCount) ] + // The incremental fold just re-derived bindings by LWW from the newly-applied ops — which CLOBBERS any + // resolution overlay (a human / keep-local "keep theirs" decision). Re-apply the overlay, exactly like + // rebuildProjections does after a full re-fold: without this, a synced-in resolution is silently reverted + // to the LWW loser on the next grow, so two peers that agreed via a resolution DIVERGE. (Effective + // binding = fold(package_ops)[LWW] -> then apply resolutions.) + do! + Telemetry.timeTask "seed.reapplyResolutions" [] (fun () -> + Resolutions.reapplyAll ()) do! Telemetry.timeTask "seed.generateRefs" [] (fun () -> task { From 2dc218918cc9b89c5a35ad4440d0570d8714049a Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 00:31:52 -0400 Subject: [PATCH 014/172] sync: re-apply resolution overlay after the PULL's fold too (complete the fix) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 3232aa684 re-applied the overlay after growIfNeeded's fold, but the pull folds through a different path — receiveOps calls applyUnappliedOps directly and returns, so after a pull all ops are already applied and the next growIfNeeded sees appliedCount=0 and never re-applies. Net: a synced-in keep-theirs still lost to auto-LWW on the receiving peer. Add the reapply at receiveOps' own fold site (gated on foldedCount>0), so the overlay is restored immediately after the pull folds ops — including the case where the overlay's own apply was an idempotent no-op because the peer happened to already be on the chosen value, and the later fold then moved it to the LWW winner. Semantics: a manual resolution DOMINATES the auto pick, locally and on any peer it syncs to (verified target: reapplyAll is not stale-gated out here — res.at is later than the op it overrides). Co-Authored-By: Claude Opus 4.8 --- backend/src/LibDB/Seed.fs | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/backend/src/LibDB/Seed.fs b/backend/src/LibDB/Seed.fs index f5f0fc8bc3..139af30959 100644 --- a/backend/src/LibDB/Seed.fs +++ b/backend/src/LibDB/Seed.fs @@ -450,6 +450,13 @@ let receiveOps // lowered (marked unapplied) so they re-fold. A pure re-pull folds nothing → 0. (Insert rows-affected // can't be used now that the op insert is an upsert: a DO UPDATE counts even a no-op re-pull.) let! foldedCount = applyUnappliedOps () + // The fold just re-derived bindings by LWW, which CLOBBERS the resolution overlay (a human keep-mine / + // keep-theirs decision). Restore it, so a manual resolution DOMINATES the auto (LWW) pick — locally and + // on any peer that synced the resolution in. This is the pull-path counterpart of the reapply that + // rebuildProjections / growIfNeeded do after their folds; without it a synced-in "keep theirs" is lost + // the moment the op it overrides folds (esp. when the overlay was applied BEFORE that op, so its own + // apply was an idempotent no-op), and the two peers DIVERGE. Effective binding = fold[LWW] -> overlay. + if foldedCount > 0L then do! Resolutions.reapplyAll () return foldedCount } From 5adf85ae40ffcb962ef4de7304cf8094fb152a14 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 01:00:38 -0400 Subject: [PATCH 015/172] cli: apps status shows running daemons, not just installed ones MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit `apps status` filtered to Registry.installed, so a daemon started with `apps start ` but not "installed" (auto-start-on-login) printed "no daemon apps installed" even while it was actively running — misleading right after you start one (e.g. the sync daemon). Now it lists every daemon that's installed OR currently running, and the empty message points at `apps start sync`. Co-Authored-By: Claude Opus 4.8 --- packages/darklang/cli/apps/command.dark | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/packages/darklang/cli/apps/command.dark b/packages/darklang/cli/apps/command.dark index 599d85e35b..c27ee113f0 100644 --- a/packages/darklang/cli/apps/command.dark +++ b/packages/darklang/cli/apps/command.dark @@ -182,12 +182,18 @@ let execute (state: Cli.AppState) (args: List) : Cli.AppState = state | [ "status" ] -> + // Every daemon that's installed OR currently running — a daemon started with `apps start` but not + // "installed" (auto-start on login) is still running and MUST show here, else `apps status` misleadingly + // reports "nothing" right after you start one (e.g. `apps start sync`). let daemons = - (Registry.installed state.currentBranchId) + (Registry.catalog state.currentBranchId) |> Stdlib.List.filter (fun a -> Model.isDaemon a.target) + |> Stdlib.List.filter (fun a -> + Registry.isInstalled a.slug || Stdlib.Cli.Daemon.isRunning a.slug) if Stdlib.List.isEmpty daemons then - Stdlib.printLine (Colors.dimText "no daemon apps installed") + Stdlib.printLine ( + Colors.dimText "No daemons running or installed. Start one, e.g.: dark apps start sync") else Stdlib.printLine "Daemon status:" daemons From 7c3681f53bbaa6e004a077e249d1456ed20c298f Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 01:30:06 -0400 Subject: [PATCH 016/172] cli: show the committer in `dark log` MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The authoring account is recorded on every commit (commits.account_id) and syncs across instances, and getCommitsForBranchChain already resolves it to a name (committerName) — but `dark log` never displayed it. On a shared / multi-user tailnet you couldn't tell WHO made a change from the history, only what + when. Print committerName on each log line (dimmed). Pure display fix; the data was already there + synced. Co-Authored-By: Claude Opus 4.8 --- packages/darklang/cli/scm/log.dark | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/packages/darklang/cli/scm/log.dark b/packages/darklang/cli/scm/log.dark index b27c875b5f..fd170aeace 100644 --- a/packages/darklang/cli/scm/log.dark +++ b/packages/darklang/cli/scm/log.dark @@ -28,11 +28,13 @@ let execute (state: AppState) (args: List) : AppState = let isAncestor = commitBranchId != currentBranchIdStr && commitBranchId != "" + // Show the committer — the account that authored the commit (resolved from accounts, synced across + // instances), so on a shared/multi-user tailnet you can see WHO made each change, not just what + when. if isAncestor then - Stdlib.printLine $"{Cli.Colors.dim}{id} {createdAt} ({opCount} ops) [{c.branchName}]{Cli.Colors.reset}" + Stdlib.printLine $"{Cli.Colors.dim}{id} {createdAt} {c.committerName} ({opCount} ops) [{c.branchName}]{Cli.Colors.reset}" Stdlib.printLine $"{Cli.Colors.dim} {c.message}{Cli.Colors.reset}" else - Stdlib.printLine $"{Cli.Colors.cyan}{id}{Cli.Colors.reset} {createdAt} ({opCount} ops)" + Stdlib.printLine $"{Cli.Colors.cyan}{id}{Cli.Colors.reset} {createdAt} {Cli.Colors.dim}{c.committerName}{Cli.Colors.reset} ({opCount} ops)" Stdlib.printLine $" {c.message}" Stdlib.printLine "") From 54381ab5cd4f5c0dc16fed201a357b58334d82e5 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 02:35:41 -0400 Subject: [PATCH 017/172] sync/tracing: default trace storage OFF in the shipped binary (fix unbounded disk-fill) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The soak caught a hard blocker: two sync daemons cross-pulling every ~30s grew each data.db to 93 GB / 186 GB in ~40 min (only 10,664 ops). Cause: trace storage is ON by default and has NO retention/GC (its own TODO admits this), and a `serve` request records its ENTIRE response as trace args — the sync endpoints return whole op/blob batches, so single trace_fn_calls rows reached ~900 MB. Every daemon pull traces the serve side, forever, until the disk fills (framey hit 0 bytes; `dark` then crashes with raw 'disk is full'). Traces are dev telemetry — already STRIPPED from the exported seed — so the shipped binary must not accumulate them. Flip TraceDetail default to Off (opt back in with DARK_CONFIG_TRACE_DETAIL=on), and set that var in config/dev + config/circleci so development and CI are unchanged (tests also pin via setForTesting). Interactive `dark eval` already uses noTracing, so this only stops the serve/daemon trace accumulation. Follow-up (existing TODO, not this commit): per-row size cap + a retention sweeper, so traces can be safely re-enabled by default. Co-Authored-By: Claude Opus 4.8 --- backend/src/LibDB/Tracing.fs | 11 +++++++++-- config/circleci | 2 ++ config/dev | 2 ++ 3 files changed, 13 insertions(+), 2 deletions(-) diff --git a/backend/src/LibDB/Tracing.fs b/backend/src/LibDB/Tracing.fs index d9f02d6ef4..c1e78c63ed 100644 --- a/backend/src/LibDB/Tracing.fs +++ b/backend/src/LibDB/Tracing.fs @@ -92,10 +92,17 @@ module TraceDetail = | Off | On + // Default OFF. Traces have NO retention/GC (see TraceStorage.store TODO) and a single trace row can be + // ~1 GB (a `serve` request records its whole response — e.g. a sync op/blob batch — as trace args). On a + // long-running `serve`/daemon that's an unbounded disk-fill: two sync daemons cross-pulling every 30s grew + // data.db to ~180 GB in ~40 min via trace_fn_calls before this default flipped. Traces are dev telemetry + // (stripped from the exported seed), so the SHIPPED binary must not accumulate them; dev + CI opt back in via + // DARK_CONFIG_TRACE_DETAIL=on (set in config/dev + config/circleci). Re-enable-by-default only once retention + // (size cap + GC) lands. let private readEnv () : T = match System.Environment.GetEnvironmentVariable "DARK_CONFIG_TRACE_DETAIL" with - | "off" -> Off - | _ -> On + | "on" -> On + | _ -> Off let mutable current : T = readEnv () diff --git a/config/circleci b/config/circleci index a5bd6a49b2..7b75b2394f 100644 --- a/config/circleci +++ b/config/circleci @@ -18,3 +18,5 @@ DARK_CONFIG_DEFAULT_LOGGER=console # Feature flag defaults DARK_CONFIG_TRACE_SAMPLING_RULE_DEFAULT=sample-all +# Trace storage on in dev/CI (shipped binary defaults OFF — traces are un-GC'd, can fill disk) +DARK_CONFIG_TRACE_DETAIL=on diff --git a/config/dev b/config/dev index c637bbf75d..4ff27a6b20 100644 --- a/config/dev +++ b/config/dev @@ -23,6 +23,8 @@ DARK_CONFIG_DEFAULT_LOGGER=console # Feature flag defaults DARK_CONFIG_TRACE_SAMPLING_RULE_DEFAULT=sample-all +# Trace storage on in dev/CI (shipped binary defaults OFF — traces are un-GC'd, can fill disk) +DARK_CONFIG_TRACE_DETAIL=on # Package source: "disk" (reload from .dark files) or "seed" (fetch from R2) # Default: disk (set to "seed" to use the seed-based flow) From c1531ad1c964103378474dcc5559c528148fd2ad Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 03:17:01 -0400 Subject: [PATCH 018/172] =?UTF-8?q?tracing:=20OFF=20must=20be=20a=20true?= =?UTF-8?q?=20no-op=20=E2=80=94=20fix=20the=20second=20daemon=20disk-fill?= =?UTF-8?q?=20(blob=20promotion)?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The earlier commit defaulted trace storage off but only gated the DB row write (TraceStorage.store). The sync soak then caught a SECOND unbounded growth: package_blobs ballooned (~4/3x per pull) even with traces 'off'. Root (same as the trace disk-fill): storeTrace runs prepareDvalForStorage BEFORE the store's off-check, and that PROMOTES every captured ephemeral blob into package_blobs (so a trace survives its VM). The serve traces each request (createCliTracer, HttpServer), and the sync endpoints' responses are whole op/blob batches — so their blobs got promoted on every pull, forever, with no GC. Confirmed by an instrumented Blob.insert: the inserts came from Tracing.prepareDvalForStorage -> promoteEphemeralLeaf -> Blob.insert on the serve. Fix: make trace-detail OFF a true no-op. storeTrace bails immediately when off (before prepare/promote/store) — the single choke point for both the sqlite and CLI tracers — and create returns the non-tracer when off (skip capture too). Verified on two real machines: daemons ran several minutes, data.db held at 43 MB (was GB-scale), package_blobs had 0 rows >1 MB, 0 blob inserts observed, and sync still converged (a beacon propagated A->B). Both disk-fill bugs closed. Co-Authored-By: Claude Opus 4.8 --- backend/src/LibDB/Tracing.fs | 28 +++++++++++++++++++++++----- 1 file changed, 23 insertions(+), 5 deletions(-) diff --git a/backend/src/LibDB/Tracing.fs b/backend/src/LibDB/Tracing.fs index c1e78c63ed..8a37979588 100644 --- a/backend/src/LibDB/Tracing.fs +++ b/backend/src/LibDB/Tracing.fs @@ -482,6 +482,15 @@ let private storeTrace (exeState : RT.ExecutionState) : Ply.Ply = uply { + // Trace detail OFF ⇒ a TRUE no-op. `prepareTraceForStorage` (below) promotes captured ephemeral blobs into + // package_blobs BEFORE `TraceStorage.store`'s own off-check — so gating only the store still let every + // traced `serve` request (sync responses = whole op/blob batches) grow package_blobs without bound. Bail + // here so neither the promote nor the store runs when tracing is off. (This is the single choke point for + // BOTH the sqlite and CLI tracers; the serve uses the CLI one.) + if TraceDetail.current = TraceDetail.Off then + return () + else + let traceIdStr = string traceID use _span = Telemetry.span "trace.store" [ "traceId", traceIdStr ] try @@ -569,8 +578,17 @@ let createNonTracer (_traceID : AT.TraceID.T) : T = let create (rootTLID : tlid) (traceID : AT.TraceID.T) : T = - let config = TracingConfig.forHandler rootTLID traceID - match config with - | TracingConfig.DoTrace - | TracingConfig.TraceWithTelemetry -> createSqliteTracer rootTLID traceID - | TracingConfig.DontTrace -> createNonTracer traceID + // Trace detail OFF must mean FULLY off — not just "don't write the trace rows". The sqlite tracer captures + // call events during execution and, at store time, `prepareDvalForStorage` PROMOTES their ephemeral blobs into + // package_blobs (so a trace survives its VM) BEFORE `TraceStorage.store`'s off-check runs. So gating only the + // store still leaves that blob-promotion firing on every `serve` request — which, for the sync endpoints + // (responses = whole op/blob batches), grew package_blobs unboundedly even with trace storage "off". Returning + // the non-tracer here makes Off a true no-op: no capture, no promote, no store. + if TraceDetail.current = TraceDetail.Off then + createNonTracer traceID + else + let config = TracingConfig.forHandler rootTLID traceID + match config with + | TracingConfig.DoTrace + | TracingConfig.TraceWithTelemetry -> createSqliteTracer rootTLID traceID + | TracingConfig.DontTrace -> createNonTracer traceID From e20892f5c955faac30d3b7e29b5d3da479401ca7 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 09:09:01 -0400 Subject: [PATCH 019/172] tests: regressions for the two overnight fixes (divergence + daemon disk-fill) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Both red-green verified (fail without the fix, pass with it): - MultiInstance 'resolution survives the INCREMENTAL fold on the pull path': guards the divergence fix. The existing test only covered a full rebuildProjections; this folds a fresh op through receiveOps (the pull path) after a resolution and asserts the human override survives. Models the idempotent-skip case that receiveOps' fold used to clobber. With the reapply disabled it reverts to the LWW winner and errors. - SyncE2E 'daemon disk-safety: serving pulls accumulates NO traces + NO oversized blobs': guards the trace disk-fills. Serves one instance, pulls it repeatedly, asserts the SERVER's trace_fn_calls stays 0 and package_blobs doesn't grow past the seed. With the storeTrace off-gate disabled the server promotes a fresh blob per request (4 after a few pulls) and errors — the test class that would have caught the overnight 90-186 GB disk-fills. Full in-process suite re-run after all overnight changes: 9,951 passed / 0 failed. SyncE2E tier (DARK_E2E=1): 6 passed / 0 failed. Co-Authored-By: Claude Opus 4.8 --- backend/tests/Tests/MultiInstance.Tests.fs | 44 ++++++++++++++++++++++ backend/tests/Tests/SyncE2E.Tests.fs | 43 +++++++++++++++++++++ 2 files changed, 87 insertions(+) diff --git a/backend/tests/Tests/MultiInstance.Tests.fs b/backend/tests/Tests/MultiInstance.Tests.fs index 5f54a48859..a4bc6b2207 100644 --- a/backend/tests/Tests/MultiInstance.Tests.fs +++ b/backend/tests/Tests/MultiInstance.Tests.fs @@ -722,6 +722,50 @@ let tests = teardown insts } + testTask + "resolution survives the INCREMENTAL fold on the pull path (receiveOps re-applies the overlay)" { + // Guards the overnight divergence fix. rebuildProjections already re-applied the overlay (test above), + // but the INCREMENTAL fold on the PULL path (receiveOps -> applyUnappliedOps) did NOT — so a synced-in + // resolution was silently reverted the moment a later op folded, and two peers that had agreed DIVERGED. + // The nastiest shape (reproduced here): the resolution's apply is an idempotent no-op because the binding + // already holds the chosen content, so the binding keeps the OLD op's origin_ts; a newer op then folds + // and out-ranks it, and only a post-fold reapply (the fix) restores the human's pick. + let mutable insts : List = [] + try + let! a = seededInstance "a" + insts <- [ a ] + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "ResIncFold" ]; name = "pick" } + activate a + let! (fnA, fnB) = twoFunctionHashes () + let! commit = existingCommit () + // Binding is fnA at .100. A human resolution ALSO picks fnA (at .300) — so applyToLocations is an + // idempotent no-op and the binding's origin_ts stays .100, NOT .300. + let! _ = Seed.receiveOps [] [ setNameEvent loc fnA commit "2026-07-08T00:00:00.100Z" ] + let res = + Resolutions.mk + loc + (PT.Reference.PackageFn(PT.Hash fnA)) + "human" + PT.mainBranchId + "2026-07-08T00:00:00.300Z" + do! Resolutions.recordAndApply res + let! beforeFold = liveHash loc + Expect.equal beforeFold [ fnA ] "the resolution's pick (fnA) is bound" + // A fresh fnB op (.200) now arrives and folds via the INCREMENTAL pull path. .200 out-ranks the + // binding's stale .100, so the fold flips it to fnB — but the resolution (.300) is newer than .200, so + // after receiveOps re-applies the overlay the human's pick MUST win again. + let! folded = Seed.receiveOps [] [ setNameEvent loc fnB commit "2026-07-08T00:00:00.200Z" ] + Expect.isGreaterThan folded 0L "the fnB op actually folded (so the reapply path runs)" + let! afterFold = liveHash loc + Expect.equal + afterFold + [ fnA ] + "the override SURVIVED the incremental fold — before the fix receiveOps folded to fnB and dropped it" + finally + teardown insts + } + testTask "branch merge syncs across stores: a branch's create + merge land on B (merged_at set)" { let mutable insts : List = [] diff --git a/backend/tests/Tests/SyncE2E.Tests.fs b/backend/tests/Tests/SyncE2E.Tests.fs index ad07f29d0e..c133c69249 100644 --- a/backend/tests/Tests/SyncE2E.Tests.fs +++ b/backend/tests/Tests/SyncE2E.Tests.fs @@ -411,6 +411,49 @@ let private realTests = (ver = "") "the CLI + store are still usable after the failed sync" }) + } + + testTask + "daemon disk-safety: serving pulls accumulates NO traces + NO oversized blobs (trace-off is a true no-op)" { + // Guards the two overnight daemon disk-fill fixes (same root: the tracing subsystem). A served instance, + // hit by repeated pulls, must NOT grow: trace storage defaults off in the shipped binary, AND off is a + // TRUE no-op — the serve used to promote every request's captured ephemeral blobs into package_blobs + // even with trace rows suppressed, so the server's blob store ballooned per pull. This is the test class + // that would have caught the 90-186 GB overnight disk-fills; it asserts on the SERVER's own store. + do! + withRoot "disksafety" (fun root -> + task { + let a = mk root "A" + let b = mk root "B" + darkIn a.dir [ "login"; "Feriel" ] |> ignore + darkIn b.dir [ "login"; "Stachu" ] |> ignore + author a "SyncTest.Disk.v" "12345" + commit a "add v" + let port = 9340 + let! server = serve a port + try + presync b $"http://127.0.0.1:{port}" + // Several pulls — each hits A's /sync/events + blob channel, the path that used to trace + promote. + for _ in 1 .. 6 do + darkIn b.dir [ "sync" ] |> ignore + // A is the SERVER (it only serves, never pulls), so serving must add NOTHING to its store: + // trace_fn_calls stays 0, and package_blobs stays exactly at the seed baseline. Comparing the + // COUNT (not just >1MB rows) catches ANY promotion — the bug persisted a fresh blob per request, + // small at first, so a size threshold would miss it while the store still grew unbounded. + let seedBlobs = (sqlite (seedDb.Force()) "SELECT COUNT(*) FROM package_blobs").Trim() + let traceRows = (sqlite (dbOf a) "SELECT COUNT(*) FROM trace_fn_calls").Trim() + let servedBlobs = (sqlite (dbOf a) "SELECT COUNT(*) FROM package_blobs").Trim() + Expect.equal + traceRows + "0" + "the serve wrote NO trace rows (trace storage off in the shipped binary)" + Expect.equal + servedBlobs + seedBlobs + "serving promoted NO new blobs into package_blobs — any growth here is the disk-fill bug" + finally + stop server + }) } ] /// A single skipped test carrying `msg` — keeps the "SyncE2E" name in the run without paying any cost. From 82c19dd0ac93fa5ab90a5d4df0d121d2cc4948e8 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 11:01:52 -0400 Subject: [PATCH 020/172] sync: surface the real per-peer pull error instead of "Couldn't reach" MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Bare `dark sync` folded every failed pull into an `unreachable` counter and printed "Couldn't reach N of M instance", discarding the actual error. But a pull can fail for reasons that have nothing to do with reachability — most notably "{peer}: a database error applying ops — stopped without advancing the cursor". Bucketing those as "unreachable" is an outright lie: the peer answered fine (curl to /sync/events returns 200), the *apply* failed. This surfaced during branch stress-testing: two branches created independently on two instances with the SAME name (different uuids) violate the branch-name UNIQUE constraint. The losing CreateBranch is INSERT-OR-IGNORE'd away, its package_ops then reference a branch id that doesn't exist locally, and the FK check aborts the pull. The operator saw only "Couldn't reach" and chased a phantom network problem for hours. Collect each pull's real Error message (already peer-prefixed and self-describing) and print them verbatim, so a genuine unreachable peer and a DB-apply error read as the different problems they are. The underlying same-name-branch convergence gap (independent creation breaks the "same id+name everywhere" invariant and jams the cursor) is a separate structural follow-up, tracked with the merge-timing divergence residual. Co-Authored-By: Claude Opus 4.8 --- packages/darklang/cli/sync.dark | 21 +++++++++++---------- 1 file changed, 11 insertions(+), 10 deletions(-) diff --git a/packages/darklang/cli/sync.dark b/packages/darklang/cli/sync.dark index 19f0cc2998..f5b0d53d31 100644 --- a/packages/darklang/cli/sync.dark +++ b/packages/darklang/cli/sync.dark @@ -278,21 +278,22 @@ let execute (state: AppState) (args: List) : AppState = | Ok n -> acc + n | Error _ -> acc) - let unreachable = - Stdlib.List.fold results 0 (fun acc r -> + // Each pull error is already peer-prefixed and self-describing — a genuine + // "Couldn't reach {peer}" reads differently from a "{peer}: a database error + // applying ops …". Surface the real message instead of bucketing every + // failure as "unreachable" (which hides apply/DB errors behind a network lie). + let errors = + Stdlib.List.fold results [] (fun acc r -> match r with | Ok _ -> acc - | Error _ -> acc + 1) + | Error e -> Stdlib.List.append acc [ e ]) - let reached = (Stdlib.List.length ps) - unreachable + let reached = (Stdlib.List.length ps) - (Stdlib.List.length errors) let _ = - if unreachable > 0 then - Stdlib.printLine ( - Colors.error - $"Couldn't reach {Stdlib.Int.toString unreachable} of {plural (Stdlib.List.length ps) "instance"}") - else - () + errors + |> Stdlib.List.map (fun e -> Colors.error e) + |> Stdlib.printLines if pulled > 0 then Stdlib.printLine ( From 8222bd8daea277968c09b7c8e275c0b1d8c4ac77 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 12:29:31 -0400 Subject: [PATCH 021/172] cleanup: make comments timeless (drop PR/incident narrative) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Tighten comments that had narrated the development of this branch rather than documenting the code: the trace-storage disk-fill incident specifics (GB/minute figures, "before this default flipped"), "overnight fix"/"the nastiest shape"/ "before the fix" in the regression tests, "phase-1/phase-2 measurements", "premature for this PR", and a couple of over-long TODO rationales. No behavior change — comments and one test-assertion message only. Co-Authored-By: Claude Opus 4.8 --- backend/src/LibDB/Seed.fs | 3 +-- backend/src/LibDB/Tracing.fs | 21 +++++++++------------ backend/src/LibExecution/RuntimeTypes.fs | 3 +-- backend/tests/Tests/MultiInstance.Tests.fs | 18 +++++++++--------- backend/tests/Tests/SyncE2E.Tests.fs | 11 +++++------ packages/darklang/stdlib/eventLog.dark | 8 ++++---- 6 files changed, 29 insertions(+), 35 deletions(-) diff --git a/backend/src/LibDB/Seed.fs b/backend/src/LibDB/Seed.fs index 139af30959..8bacf4b38c 100644 --- a/backend/src/LibDB/Seed.fs +++ b/backend/src/LibDB/Seed.fs @@ -441,8 +441,7 @@ let receiveOps // TODO(receive-atomicity): the insert above, detectDivergences below, and applyUnappliedOps run in // three separate transactions. A mid-fold throw can leave conflicts recorded for ops that never // folded — transiently inconsistent, though it self-heals on the next grow. The fix is to thread a - // single transaction/connection through detect + fold (the same connection-threading a true - // multi-store test harness needs), deferred to keep this change off the hot path for now. + // single transaction/connection through detect + fold. // Record any divergences BEFORE the fold: an incoming SetName that rebinds a name already bound // locally to a different hash is a sync conflict (auto-resolved by LWW). Recorded so it's reviewable. do! Conflicts.detectDivergences events diff --git a/backend/src/LibDB/Tracing.fs b/backend/src/LibDB/Tracing.fs index 8a37979588..5ffa191dba 100644 --- a/backend/src/LibDB/Tracing.fs +++ b/backend/src/LibDB/Tracing.fs @@ -92,13 +92,11 @@ module TraceDetail = | Off | On - // Default OFF. Traces have NO retention/GC (see TraceStorage.store TODO) and a single trace row can be - // ~1 GB (a `serve` request records its whole response — e.g. a sync op/blob batch — as trace args). On a - // long-running `serve`/daemon that's an unbounded disk-fill: two sync daemons cross-pulling every 30s grew - // data.db to ~180 GB in ~40 min via trace_fn_calls before this default flipped. Traces are dev telemetry - // (stripped from the exported seed), so the SHIPPED binary must not accumulate them; dev + CI opt back in via - // DARK_CONFIG_TRACE_DETAIL=on (set in config/dev + config/circleci). Re-enable-by-default only once retention - // (size cap + GC) lands. + // Default OFF: traces have no retention/GC (see TraceStorage.store) and a single row can reach ~1 GB (a + // `serve` request records its whole response — e.g. a sync op/blob batch — as trace args), so a long-running + // `serve`/daemon fills the disk unbounded. Traces are dev telemetry (stripped from the exported seed), so + // the shipped binary must not accumulate them; dev/CI opt in via DARK_CONFIG_TRACE_DETAIL=on. Default back + // to on only once retention (size cap + GC) exists. let private readEnv () : T = match System.Environment.GetEnvironmentVariable "DARK_CONFIG_TRACE_DETAIL" with | "on" -> On @@ -482,11 +480,10 @@ let private storeTrace (exeState : RT.ExecutionState) : Ply.Ply = uply { - // Trace detail OFF ⇒ a TRUE no-op. `prepareTraceForStorage` (below) promotes captured ephemeral blobs into - // package_blobs BEFORE `TraceStorage.store`'s own off-check — so gating only the store still let every - // traced `serve` request (sync responses = whole op/blob batches) grow package_blobs without bound. Bail - // here so neither the promote nor the store runs when tracing is off. (This is the single choke point for - // BOTH the sqlite and CLI tracers; the serve uses the CLI one.) + // Trace detail OFF must be a true no-op. `prepareTraceForStorage` (below) promotes captured ephemeral + // blobs into package_blobs before `TraceStorage.store`'s own off-check, so gating only the store still + // grows package_blobs on every traced request. Bail here so neither the promote nor the store runs. This + // is the single choke point for both the sqlite and CLI tracers (the serve uses the CLI one). if TraceDetail.current = TraceDetail.Off then return () else diff --git a/backend/src/LibExecution/RuntimeTypes.fs b/backend/src/LibExecution/RuntimeTypes.fs index 562fcf3913..32465a28e1 100644 --- a/backend/src/LibExecution/RuntimeTypes.fs +++ b/backend/src/LibExecution/RuntimeTypes.fs @@ -516,8 +516,7 @@ type EphemeralBlob = /// `| Subblob of parent: BlobRef * offset: int64 * length: int64` /// so `Bytes.slice` returns a view rather than copying. `readBlobBytes` /// would walk to the root; promotion would promote just the slice -/// (default) or the parent. Skip until a profile shows slice-copy is -/// hot — neither phase-1 nor phase-2 measurements flagged it. +/// (default) or the parent. Skip until a profile shows slice-copy is hot. type BlobRef = | Ephemeral of EphemeralBlob | Persistent of hash : string * length : int64 diff --git a/backend/tests/Tests/MultiInstance.Tests.fs b/backend/tests/Tests/MultiInstance.Tests.fs index a4bc6b2207..b4a072ecdd 100644 --- a/backend/tests/Tests/MultiInstance.Tests.fs +++ b/backend/tests/Tests/MultiInstance.Tests.fs @@ -425,8 +425,8 @@ let tests = testTask "deprecation converges: a Deprecate authored on A folds into `deprecations` on B via the wire" { - // Coverage for a NON-SetName op kind end to end — the `deprecations` projection (new this PR) folds + - // syncs like locations do. Proves the fold/wire path isn't SetName-specific. + // Coverage for a NON-SetName op kind end to end — the `deprecations` projection folds + syncs like + // locations do. Proves the fold/wire path isn't SetName-specific. let mutable insts : List = [] try let! a = seededInstance "a" @@ -724,12 +724,12 @@ let tests = testTask "resolution survives the INCREMENTAL fold on the pull path (receiveOps re-applies the overlay)" { - // Guards the overnight divergence fix. rebuildProjections already re-applied the overlay (test above), - // but the INCREMENTAL fold on the PULL path (receiveOps -> applyUnappliedOps) did NOT — so a synced-in - // resolution was silently reverted the moment a later op folded, and two peers that had agreed DIVERGED. - // The nastiest shape (reproduced here): the resolution's apply is an idempotent no-op because the binding - // already holds the chosen content, so the binding keeps the OLD op's origin_ts; a newer op then folds - // and out-ranks it, and only a post-fold reapply (the fix) restores the human's pick. + // The incremental fold on the PULL path (receiveOps -> applyUnappliedOps) must re-apply the resolution + // overlay, just as rebuildProjections does (test above); otherwise a synced-in resolution is silently + // reverted the moment a later op folds, and two peers that had agreed diverge. The hard shape covered + // here: the resolution's apply is an idempotent no-op because the binding already holds the chosen + // content, so the binding keeps the OLD op's origin_ts; a newer op then folds and out-ranks it, and + // only a post-fold reapply restores the human's pick. let mutable insts : List = [] try let! a = seededInstance "a" @@ -761,7 +761,7 @@ let tests = Expect.equal afterFold [ fnA ] - "the override SURVIVED the incremental fold — before the fix receiveOps folded to fnB and dropped it" + "the override survives the incremental fold (without the post-fold reapply, receiveOps folds to fnB)" finally teardown insts } diff --git a/backend/tests/Tests/SyncE2E.Tests.fs b/backend/tests/Tests/SyncE2E.Tests.fs index c133c69249..839aeb58b9 100644 --- a/backend/tests/Tests/SyncE2E.Tests.fs +++ b/backend/tests/Tests/SyncE2E.Tests.fs @@ -415,11 +415,10 @@ let private realTests = testTask "daemon disk-safety: serving pulls accumulates NO traces + NO oversized blobs (trace-off is a true no-op)" { - // Guards the two overnight daemon disk-fill fixes (same root: the tracing subsystem). A served instance, - // hit by repeated pulls, must NOT grow: trace storage defaults off in the shipped binary, AND off is a - // TRUE no-op — the serve used to promote every request's captured ephemeral blobs into package_blobs - // even with trace rows suppressed, so the server's blob store ballooned per pull. This is the test class - // that would have caught the 90-186 GB overnight disk-fills; it asserts on the SERVER's own store. + // A served instance, hit by repeated pulls, must not grow its own store: trace storage defaults off in + // the shipped binary, and off is a true no-op. (Otherwise the serve promotes every request's captured + // ephemeral blobs into package_blobs even with trace rows suppressed, so the blob store grows per pull.) + // Asserts on the SERVER's store — the instance that only serves, never pulls. do! withRoot "disksafety" (fun root -> task { @@ -464,7 +463,7 @@ let tests = if not enabled then skippedWith "set DARK_E2E=1 to run the heavy real-process sync tests" elif cliExe = "" then - // Enabled but nothing to drive — fail loudly-but-skipped with the fix, not a cryptic Process error. + // Enabled but nothing to drive — fail loudly-but-skipped, not with a cryptic Process error. skippedWith "DARK_E2E=1 but no Cli exe found under backend/Build/out/Cli/Debug — build it first (dotnet build backend/src/Cli/Cli.fsproj)" else diff --git a/packages/darklang/stdlib/eventLog.dark b/packages/darklang/stdlib/eventLog.dark index 7cda13204a..32ac5a2d78 100644 --- a/packages/darklang/stdlib/eventLog.dark +++ b/packages/darklang/stdlib/eventLog.dark @@ -8,10 +8,10 @@ module Darklang.Stdlib.EventLog // Records and the Stream are built NATIVELY (`packageOpsReadNative` / `packageOpsAppendNative` / …), so a // 1000-op batch stays milliseconds — never per-row Dark interpreter overhead. // -// CLEANUP(eventlog-generic): a generic first-class `EventLog` type-triple (like `DDB`/`KTDB`) was surveyed + -// prototyped, then dropped for these concrete per-log tables + native builtins (simpler, and the perf lives in -// the native reader). A truly generic event-log primitive (tracing/messaging/cron as named logs on one -// substrate) is a plausible future direction — premature for this PR. +// CLEANUP(eventlog-generic): these are concrete per-log tables + native builtins rather than a generic +// first-class `EventLog` type-triple (like `DDB`/`KTDB`) — simpler, and the perf lives in the native reader. +// A truly generic event-log primitive (tracing/messaging/cron as named logs on one substrate) is a plausible +// future direction. /// An opaque position in a log. You advance it by reading, and resume from where you left off. Compare or /// serialize it, but don't depend on the wrapped value — it's the log's private cursor representation. From f8c472ce117b0d79dfc9788c483d9f4615038554 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 12:44:31 -0400 Subject: [PATCH 022/172] conflicts: validate the keep target + report the real resolve result MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Two robustness fixes to human conflict resolution: - conflictKeep now refuses a chosenHash that isn't one of the conflict's two candidates (localHash/incomingHash). A Resolution must bind content that was actually in contention at that location; without the guard a caller could mint a SYNCED Resolution to arbitrary content and converge every peer onto it. - keep-mine/keep-theirs now branch on conflictKeep's Bool like `ok` already does, instead of discarding it and unconditionally printing "Kept … will sync". If the conflict was concurrently acknowledged/removed (keep returns false) the user is no longer told a resolution was minted when it was a no-op. Verified: backend builds clean; packages load; MultiInstance (17) + SyncScenarios (6) resolution/conflict tests pass; `conflicts keep-mine ` reports no open conflict. Co-Authored-By: Claude Opus 4.8 --- .../Builtins.Matter/Libs/Conflicts.fs | 5 ++++- packages/darklang/cli/conflicts.dark | 22 ++++++++++--------- 2 files changed, 16 insertions(+), 11 deletions(-) diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Conflicts.fs b/backend/src/Builtins/Builtins.Matter/Libs/Conflicts.fs index f8c6355705..95aed81091 100644 --- a/backend/src/Builtins/Builtins.Matter/Libs/Conflicts.fs +++ b/backend/src/Builtins/Builtins.Matter/Libs/Conflicts.fs @@ -119,7 +119,9 @@ let fns () : List = |> List.tryFind (fun c -> c.location = location && c.status = "auto-resolved") with - | Some c -> + // A resolution must bind one of the TWO conflicting candidates; refuse an arbitrary hash so a + // caller can't mint a synced Resolution to content that was never in contention at this location. + | Some c when chosenHash = c.localHash || chosenHash = c.incomingHash -> let loc = LibDB.Conflicts.parseLocation location let itemKind = PT.ItemKind.fromString c.itemKind let chosenRef = @@ -132,6 +134,7 @@ let fns () : List = do! LibDB.Resolutions.recordAndApply r do! LibDB.Conflicts.markOverridden c.id return DBool true + | Some _ | None -> return DBool false } | _ -> incorrectArgs ()) diff --git a/packages/darklang/cli/conflicts.dark b/packages/darklang/cli/conflicts.dark index bcbe136225..196dff7335 100644 --- a/packages/darklang/cli/conflicts.dark +++ b/packages/darklang/cli/conflicts.dark @@ -211,11 +211,12 @@ let execute (state: AppState) (args: List) : AppState = | [ "keep-mine"; location ] -> match findOpen location with | Some c -> - let _ = keep location c.localHash - - Stdlib.printLine ( - Colors.success - $"Kept yours ({short c.localHash}) at {location}. This resolution will sync to your peers.") + if keep location c.localHash then + Stdlib.printLine ( + Colors.success + $"Kept yours ({short c.localHash}) at {location}. This resolution will sync to your peers.") + else + Stdlib.printLine (Colors.error (noneMsg location)) state | None -> @@ -225,11 +226,12 @@ let execute (state: AppState) (args: List) : AppState = | [ "keep-theirs"; location ] -> match findOpen location with | Some c -> - let _ = keep location c.incomingHash - - Stdlib.printLine ( - Colors.success - $"Kept theirs ({short c.incomingHash}) at {location}. This resolution will sync to your peers.") + if keep location c.incomingHash then + Stdlib.printLine ( + Colors.success + $"Kept theirs ({short c.incomingHash}) at {location}. This resolution will sync to your peers.") + else + Stdlib.printLine (Colors.error (noneMsg location)) state | None -> From 174e73da889073cc4ebb7311cd373d1f504b2029 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 12:44:31 -0400 Subject: [PATCH 023/172] sync: validate port/interval in the first-run dialog MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The first-run setup prompt stored port/interval on a bare Int.parse success, bypassing the 1..65535 / positive-interval range checks that `dark sync daemon config` enforces — so `0`/`70000` got written and only failed later at daemon start. Route both through daemonConfigValue (the same validator), so an out-of-range value is rejected at the prompt instead of silently persisted. Co-Authored-By: Claude Opus 4.8 --- packages/darklang/cli/sync.dark | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/packages/darklang/cli/sync.dark b/packages/darklang/cli/sync.dark index f5b0d53d31..ed0dc63b08 100644 --- a/packages/darklang/cli/sync.dark +++ b/packages/darklang/cli/sync.dark @@ -88,18 +88,20 @@ let private firstRunDialog () : Unit = Stdlib.Cli.UI.Prompt.ask $" interval seconds [{Stdlib.Int.toString (intervalSec ())}]:" + // Validate through daemonConfigValue (the same range checks `dark sync daemon config` enforces) so the + // first-run dialog can't store an out-of-range interval/port that only fails later at daemon start. let _ = - match Stdlib.Int.parse intervalIn with - | Ok secs -> setConfig "apps.sync.intervalMs" (Stdlib.Int.toString (secs * 1000)) - | Error _ -> () + match daemonConfigValue "interval" intervalIn with + | Some((k, v)) -> setConfig k v + | None -> () let portIn = Stdlib.Cli.UI.Prompt.ask $" port [{Stdlib.Int.toString (servePort ())}]:" let _ = - match Stdlib.Int.parse portIn with - | Ok _ -> setConfig "apps.sync-server.port" portIn - | Error _ -> () + match daemonConfigValue "port" portIn with + | Some((k, v)) -> setConfig k v + | None -> () let modeIn = Stdlib.Cli.UI.Prompt.select From 4875ac744ae9d8c3060d6d30af1e1c7dec52b6a7 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 12:47:11 -0400 Subject: [PATCH 024/172] sync: index sync_conflicts(branch_id, location, status) for reapplyAll MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit reapplyAll runs on every op-applying grow and every pull that folds, calling markOverriddenByLocation once per stored resolution — an UPDATE filtered on (branch_id, location, status). sync_conflicts was indexed only on detected_at, so each call full-scanned the table, making reapply O(resolutions x conflicts) on the sync/startup hot path. Add the covering index. CREATE INDEX IF NOT EXISTS via schema.sql, so it also lands on existing stores on reload. Migration + release path verified: Releases tests (16) pass. Co-Authored-By: Claude Opus 4.8 --- backend/migrations/schema.sql | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/backend/migrations/schema.sql b/backend/migrations/schema.sql index a5661c0a67..2448e37cbb 100644 --- a/backend/migrations/schema.sql +++ b/backend/migrations/schema.sql @@ -153,6 +153,10 @@ CREATE TABLE IF NOT EXISTS sync_conflicts ( detected_at TIMESTAMP NOT NULL DEFAULT (datetime('now')) ); CREATE INDEX IF NOT EXISTS idx_sync_conflicts_detected_at ON sync_conflicts(detected_at DESC); +-- markOverriddenByLocation (run per resolution on every reapplyAll, i.e. every grow/pull) filters on +-- (branch_id, location, status); without this it full-scans sync_conflicts once per stored resolution. +CREATE INDEX IF NOT EXISTS idx_sync_conflicts_branch_location + ON sync_conflicts(branch_id, location, status); -- resolutions: SYNCED override overlay. A resolution binds a contested location to a chosen content, -- competing in the same timestamp-LWW that orders bindings (by `at`). id is a wire-carried uuid (idempotent). From c03bffc8b1a20d7f29ad3f4d5c669aabcb104d1a Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 12:50:38 -0400 Subject: [PATCH 025/172] =?UTF-8?q?tests:=20AlphaNormalize=20=E2=80=94=20r?= =?UTF-8?q?eal=20idempotence=20check=20+=20match-binder-position=20negativ?= =?UTF-8?q?e?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit - The idempotence test compared computeFnHash(normalizeFn(normalizeFn f)) to computeFnHash(normalizeFn f), but computeFnHash normalizes internally — both sides got re-normalized, so a first-pass non-idempotence couldn't be observed. Compare the normalizeExpr structures directly (ids preserved, only binders renamed) over a body with real let/lambda/shadowing binders. - Add a negative test that match-binder POSITION matters: `| (x,y) -> x` must hash differently from `| (x,y) -> y`. The prior match test had a single binder, so a bug collapsing all match binders to one symbol would have passed. Co-Authored-By: Claude Opus 4.8 --- backend/tests/Tests/AlphaNormalize.Tests.fs | 35 ++++++++++++++++++--- 1 file changed, 30 insertions(+), 5 deletions(-) diff --git a/backend/tests/Tests/AlphaNormalize.Tests.fs b/backend/tests/Tests/AlphaNormalize.Tests.fs index 5da634709f..bf8e581ad5 100644 --- a/backend/tests/Tests/AlphaNormalize.Tests.fs +++ b/backend/tests/Tests/AlphaNormalize.Tests.fs @@ -90,6 +90,18 @@ let tests = Expect.equal (h [] mx) (h [] my) "alpha-equivalent match cases hash equal" } + test "match binder position matters: `| (x,y) -> x` ≢ `| (x,y) -> y`" { + // guards that multi-binder normalization keeps WHICH bound var the rhs uses — not just that it + // renames binders. Both patterns bind the same two names; only the rhs's choice differs. + let tuplePat = PT.MPTuple(gid (), mpVar "x", mpVar "y", []) + let mFirst = eMatch (eInt64 0L) [ caseOf tuplePat (eVar "x") ] + let mSecond = eMatch (eInt64 0L) [ caseOf tuplePat (eVar "y") ] + Expect.notEqual + (h [] mFirst) + (h [] mSecond) + "which tuple-bound variable the rhs returns is a real difference" + } + test "free variables are preserved (a free var is a real reference, not a binder)" { // `z` / `w` are neither parameters nor locally bound — they must survive normalization distinctly @@ -118,10 +130,23 @@ let tests = } test - "normalization is idempotent (normalizing an already-normalized fn is a no-op)" { - let f = fnOf [ "x"; "y" ] (eTuple (eVar "y") (eVar "x") []) + "normalization is idempotent (re-normalizing an already-normalized expr is a structural no-op)" { + // Compare the normalized EXPR structures directly (not through computeFnHash, which normalizes + // internally — that would re-normalize both sides and hide a first-pass difference). normalizeExpr + // preserves ids and only renames binders, so a second pass over the canonical form must be identity. + // Use real binders (let + lambda + a shadowing inner let) so there is something to normalize. + let body = + eLet + (lpVar "outer") + (eInt64 1L) + (eLambda + (gid ()) + [ lpVar "p" ] + (eLet (lpVar "inner") (eVar "p") (eVar "inner"))) + let once = Hashing.normalizeExpr body + let twice = Hashing.normalizeExpr once Expect.equal - (Hashing.computeFnHash Hashing.Normal (normalizeFn (normalizeFn f))) - (Hashing.computeFnHash Hashing.Normal (normalizeFn f)) - "normalizeFn (normalizeFn f) hashes the same as normalizeFn f" + twice + once + "normalizeExpr (normalizeExpr e) is structurally identical to normalizeExpr e" } ] From b6188e9f4e58280d1da2e51aba99410626001882 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 13:04:18 -0400 Subject: [PATCH 026/172] cli: reconcile the store's Release on startup (upgrade path) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The shipped CLI seeds a fresh store from the embedded db but never migrated an EXISTING store from a previous release: it runs neither the schema-bootstrap nor the Release migrator (those live in LocalExec, not the CLI), so a store whose schema/op-format/hashing predates the running binary was used as-is — and crashed on the first write (e.g. "table package_ops has no column named origin_ts") with a raw SQLite stack trace, while the designed Release-3 clean-break never fired. On startup, when data.db already exists, reconcile its Release stamp with this binary's currentRelease. The release is read via a throwaway NON-POOLED connection so LibDB's shared connection isn't bound to the old file before a possible reseed, and the read distinguishes three cases: - Stamped = current -> proceed - Stamped > current -> refuse with a clear message + exit 1 (older code must not open a newer store) - Stamped < current, or PreTracking (no release_state_v0) -> crossing into the current (clean-break) Release means the old package data can't be reused in place; back up data.db (+wal/shm) to a timestamped .bak and re-extract the embedded current-Release seed, then tell the user where the backup is and to re-pull / re-author. - Unreadable (couldn't open/query at all) -> do NOT touch it; a transient lock must never trigger a data-destroying reseed. Verified end-to-end on a rebuilt release artifact: fresh install; same-release no-op; pre-tracking old-shape store (the crash case) reseeds + first author now succeeds; release-2 store reseeds; release-4 store refuses with exit 1 and leaves the store untouched. Co-Authored-By: Claude Opus 4.8 --- backend/src/Cli/EmbeddedResources.fs | 87 ++++++++++++++++++++++++++++ 1 file changed, 87 insertions(+) diff --git a/backend/src/Cli/EmbeddedResources.fs b/backend/src/Cli/EmbeddedResources.fs index 084a79c6af..fbe6a4ff37 100644 --- a/backend/src/Cli/EmbeddedResources.fs +++ b/backend/src/Cli/EmbeddedResources.fs @@ -79,6 +79,89 @@ let private hasEmbeddedResource (resourceName : string) : bool = let assembly = Assembly.GetExecutingAssembly() assembly.GetManifestResourceNames() |> Array.contains resourceName + +// ── Release reconciliation on an EXISTING store ────────────────────────────────────────────────────── +// The CLI seeds a fresh store from the embedded db, but a store left over from a PREVIOUS CLI release is +// not otherwise migrated: the schema/op-format/hashing can differ, and the shipped CLI doesn't run the +// LocalExec migrator. So on startup we reconcile the store's Release stamp with this binary's +// `LibDB.Releases.currentRelease` before any LibDB connection is opened. + +/// The store's Release, as read at startup. +type private StoreRelease = + | Stamped of int // release_state_v0 has a row — a definitive answer + | PreTracking // opened fine, but no release_state_v0 — predates Release tracking + | Unreadable // couldn't open/query the db at all — do NOT destroy it (may be locked, not stale) + +/// Read the store's Release stamp via a throwaway, NON-POOLED connection, so LibDB's own (pooled) shared +/// connection is never opened here — a reseed moves the db file aside, and a pooled handle would keep +/// pointing at the moved inode. Distinguishes "opened fine but stale" (safe to reseed) from "couldn't read" +/// (a transient lock / permission issue — must NOT trigger a data-destroying reseed). +let private readStoredRelease (dbPath : string) : StoreRelease = + try + use conn = + new Microsoft.Data.Sqlite.SqliteConnection( + $"Data Source={dbPath};Mode=ReadOnly;Pooling=false" + ) + conn.Open() + use tableCmd = conn.CreateCommand() + tableCmd.CommandText <- + "SELECT 1 FROM sqlite_master WHERE type = 'table' AND name = 'release_state_v0'" + match tableCmd.ExecuteScalar() with + | null -> PreTracking + | _ -> + use cmd = conn.CreateCommand() + cmd.CommandText <- "SELECT \"release\" FROM release_state_v0 WHERE id = 0" + match cmd.ExecuteScalar() with + | null -> PreTracking + | v -> Stamped(Convert.ToInt32 v) + with _ -> + Unreadable + +/// Move the stale store (and its WAL/SHM sidecars, so a leftover WAL can't attach to the new db) aside to +/// a timestamped backup, then re-extract the embedded current-Release seed. Returns the backup path. +let private reseedStore (dbPath : string) (storedLabel : string) : string = + let stamp = DateTime.UtcNow.ToString("yyyyMMddHHmmss") + let backup = $"{dbPath}.{storedLabel}-{stamp}.bak" + File.Move(dbPath, backup) + for suffix in [ "-wal"; "-shm" ] do + let side = dbPath + suffix + if File.Exists side then File.Move(side, backup + suffix) + extractGzippedResource "data.db.gz" dbPath + backup + +/// Back up + re-seed the store, then tell the user what happened and how to repopulate it. +let private reseedAndReport + (dbPath : string) + (current : int) + (storedLabel : string) + : unit = + let backup = reseedStore dbPath storedLabel + eprintfn + $"Upgraded this data directory to Release {current} (was {storedLabel}); previous store backed up to {backup}." + eprintfn "Re-connect and pull from your peers, or re-author, to repopulate it." + +/// Reconcile an existing store's Release with this binary's. Called only when data.db already exists. +let private reconcileExistingStore (dbPath : string) : unit = + let current = LibDB.Releases.currentRelease + match readStoredRelease dbPath with + | Stamped r when r = current -> () // up to date — nothing to do + | Unreadable -> () // couldn't read it — don't touch it; the normal open will proceed or fail loudly + | Stamped r when r > current -> + // A newer store must not be opened by older code (it could corrupt the newer format). Refuse. + eprintfn + $"This Darklang data directory is from a newer release (Release {r}); this binary is Release {current}." + eprintfn + $"Upgrade the CLI, or move {dbPath} aside to start fresh — refusing to open it with older code." + exit 1 + | Stamped r -> + // Stamped older than this binary. Crossing into the current Release is a clean break (content hashing + // changed), so the old package data can't be reused in place — re-seed from the embedded current-Release + // store, keeping the old one as a recoverable backup. + reseedAndReport dbPath current $"release{r}" + | PreTracking -> + // Predates Release tracking — same clean-break reseed as an older stamped store. + reseedAndReport dbPath current "pretracking" + let extract () : unit = // The embedded resource is `data.db.gz` (the seed db, gzip-compressed at // build time to save ~7 MB on binary size). On first run, decompress to @@ -106,3 +189,7 @@ let extract () : unit = Directory.CreateDirectory(logsDir) |> ignore printfn "CLI data directory setup complete" + else + // An existing store from a previous run/release — reconcile its Release with this binary's before any + // LibDB connection opens (a mismatch either refuses to open or re-seeds; a match is a no-op). + reconcileExistingStore dbPath From 88c314a6d9e2016b5f6e8306eaffd046219b6d58 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 17:51:00 -0400 Subject: [PATCH 027/172] cli: migrate durable releases in place (preserve data), reseed only on clean-break MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The startup reconcile previously re-seeded (discard + backup) on ANY older/ pre-tracking store. But the Release framework already migrates a store forward in place, source-free, for a DURABLE release (schema copy-swap + op-format re-serialize + refold) — only a clean-break Release (e.g. a content-hashing change, like Release 3) truly invalidates the on-disk data. Add `Releases.planCliUpgrade` (pure, unit-tested): reuses `planRelease`, then splits a Migrate on whether any pending step is `clearForRebuild`: - Proceed / RefuseNewer — as before - MigrateInPlace — all pending steps durable → run applyPending, PRESERVING the store - Reseed — a clean-break step, or a pre-tracking store of unknown format → back up + re-seed from the embedded current-Release store The CLI reconcile now dispatches on it. Behaviour for the current Release 3 (clean-break) is unchanged — it still routes to Reseed — so this only adds the data-preserving path for future additive/format releases. Five new planCliUpgrade unit tests; existing Release tests still green (21 total). Co-Authored-By: Claude Opus 4.8 --- backend/src/Cli/EmbeddedResources.fs | 45 +++++++++++++++++---------- backend/src/LibDB/Releases.fs | 32 +++++++++++++++++++ backend/tests/Tests/Releases.Tests.fs | 45 ++++++++++++++++++++++++++- 3 files changed, 105 insertions(+), 17 deletions(-) diff --git a/backend/src/Cli/EmbeddedResources.fs b/backend/src/Cli/EmbeddedResources.fs index fbe6a4ff37..77c1364b86 100644 --- a/backend/src/Cli/EmbeddedResources.fs +++ b/backend/src/Cli/EmbeddedResources.fs @@ -144,23 +144,36 @@ let private reseedAndReport let private reconcileExistingStore (dbPath : string) : unit = let current = LibDB.Releases.currentRelease match readStoredRelease dbPath with - | Stamped r when r = current -> () // up to date — nothing to do | Unreadable -> () // couldn't read it — don't touch it; the normal open will proceed or fail loudly - | Stamped r when r > current -> - // A newer store must not be opened by older code (it could corrupt the newer format). Refuse. - eprintfn - $"This Darklang data directory is from a newer release (Release {r}); this binary is Release {current}." - eprintfn - $"Upgrade the CLI, or move {dbPath} aside to start fresh — refusing to open it with older code." - exit 1 - | Stamped r -> - // Stamped older than this binary. Crossing into the current Release is a clean break (content hashing - // changed), so the old package data can't be reused in place — re-seed from the embedded current-Release - // store, keeping the old one as a recoverable backup. - reseedAndReport dbPath current $"release{r}" - | PreTracking -> - // Predates Release tracking — same clean-break reseed as an older stamped store. - reseedAndReport dbPath current "pretracking" + | storeRel -> + let stored = + match storeRel with + | Stamped r -> Some r + | _ -> None + let label = + match storeRel with + | Stamped r -> $"release{r}" + | _ -> "pretracking" + match LibDB.Releases.planCliUpgrade LibDB.Releases.releases stored current with + | LibDB.Releases.CliUpgrade.Proceed -> () // up to date + | LibDB.Releases.CliUpgrade.RefuseNewer r -> + // A newer store must not be opened by older code (it could corrupt the newer format). Refuse. + eprintfn + $"This Darklang data directory is from a newer release (Release {r}); this binary is Release {current}." + eprintfn + $"Upgrade the CLI, or move {dbPath} aside to start fresh — refusing to open it with older code." + exit 1 + | LibDB.Releases.CliUpgrade.MigrateInPlace -> + // Every pending step is durable — migrate the store forward in place, PRESERVING the data (schema + // copy-swap + op-format re-serialize + refold). No source needed, so the CLI can run it directly. + LibDB.Releases.applyPending current + eprintfn + $"Upgraded this data directory from {label} to Release {current} (data preserved)." + | LibDB.Releases.CliUpgrade.Reseed -> + // A clean-break Release (content hashing changed) or a pre-tracking store of unknown format: the old + // package data can't be reused in place, so back it up and re-seed from the embedded current-Release + // store. + reseedAndReport dbPath current label let extract () : unit = // The embedded resource is `data.db.gz` (the seed db, gzip-compressed at diff --git a/backend/src/LibDB/Releases.fs b/backend/src/LibDB/Releases.fs index 5cd32b45ea..aaa1371309 100644 --- a/backend/src/LibDB/Releases.fs +++ b/backend/src/LibDB/Releases.fs @@ -198,6 +198,38 @@ let planRelease | Some s when s > codeRelease -> RefuseNewer s | Some s -> Migrate(pendingReleases registry s codeRelease) + +/// What the CLI should do with an EXISTING store, given the same (registry, stored, code) inputs as +/// `planRelease`. The CLI has no package source to rebuild from, so its clean-break path RE-SEEDS from the +/// embedded current-Release store (discarding + backing up the old data); a DURABLE migration instead runs +/// the steps in place and PRESERVES the store. +[] +type CliUpgrade = + | Proceed // already at the code Release + | RefuseNewer of storeN : int // a newer store — older code must not open it + | MigrateInPlace // every pending step is durable — migrate forward, keeping the data + | Reseed // a pending clean-break step, or a pre-tracking store of unknown format — discard + re-seed + +/// Pure: the CLI's upgrade decision. Reuses `planRelease`, then splits a `Migrate` on whether ANY pending +/// step is a clean-break (`clearForRebuild`): a clean break invalidates the on-disk content (e.g. a hashing +/// change), so it can't migrate in place — the CLI re-seeds; an all-durable run migrates forward in place. +/// `StampFresh` here means a pre-tracking store (no Release stamp) — the CLI can't trust its on-disk format, +/// so it re-seeds rather than assume it's already current. +let planCliUpgrade + (registry : Release list) + (stored : int option) + (codeRelease : int) + : CliUpgrade = + match planRelease registry stored codeRelease with + | UpToDate -> CliUpgrade.Proceed + | RefuseNewer s -> CliUpgrade.RefuseNewer s + | StampFresh -> CliUpgrade.Reseed + | Migrate steps -> + if steps |> List.exists (fun r -> r.clearForRebuild) then + CliUpgrade.Reseed + else + CliUpgrade.MigrateInPlace + /// Reconcile the store's Release with this binary's (`codeRelease = currentRelease`) and execute the /// decision. The *decision* is `planRelease` (pure, tested); this wraps it with the DB read/write. let applyPending (codeRelease : int) : unit = diff --git a/backend/tests/Tests/Releases.Tests.fs b/backend/tests/Tests/Releases.Tests.fs index 411e9776c5..cb0b81423c 100644 --- a/backend/tests/Tests/Releases.Tests.fs +++ b/backend/tests/Tests/Releases.Tests.fs @@ -12,10 +12,14 @@ open Prelude module Releases = LibDB.Releases -/// a step that only declares its Release number (no migration body) — enough for the planning tests +/// a DURABLE step that only declares its Release number (no migration body) — enough for the planning tests let private step (n : int) : Releases.Release = { n = n; sql = ""; reserialize = None; clearForRebuild = false } +/// a CLEAN-BREAK step (invalidates on-disk content, e.g. a hashing change) +let private cleanBreakStep (n : int) : Releases.Release = + { n = n; sql = ""; reserialize = None; clearForRebuild = true } + let tests = testList "Releases" @@ -148,6 +152,45 @@ let tests = | other -> failtest $"expected Migrate [3;4], got %A{other}" } + // planCliUpgrade — the CLI's data-preserving vs re-seed decision, layered on planRelease. Pure, so the + // "durable migrates in place / clean-break re-seeds / newer refuses" policy is pinned without a store. + test "planCliUpgrade: store == code → Proceed" { + Expect.equal + (Releases.planCliUpgrade [ step 3 ] (Some 3) 3) + Releases.CliUpgrade.Proceed + "already current → nothing to do" + } + + test "planCliUpgrade: store > code → RefuseNewer (older code must not open it)" { + Expect.equal + (Releases.planCliUpgrade [ step 3 ] (Some 5) 3) + (Releases.CliUpgrade.RefuseNewer 5) + "a newer store is refused, reporting its Release" + } + + test + "planCliUpgrade: all-durable pending steps → MigrateInPlace (data preserved)" { + Expect.equal + (Releases.planCliUpgrade [ step 2; step 3; step 4 ] (Some 2) 4) + Releases.CliUpgrade.MigrateInPlace + "durable-only migration runs in place and keeps the store" + } + + test + "planCliUpgrade: any pending clean-break step → Reseed (content can't migrate in place)" { + Expect.equal + (Releases.planCliUpgrade [ step 2; cleanBreakStep 3; step 4 ] (Some 2) 4) + Releases.CliUpgrade.Reseed + "a clean break anywhere in the pending range forces a re-seed" + } + + test "planCliUpgrade: pre-tracking store (no stamp) → Reseed (unknown format)" { + Expect.equal + (Releases.planCliUpgrade [ step 3 ] None 3) + Releases.CliUpgrade.Reseed + "the CLI can't trust an unstamped store's on-disk format → re-seed" + } + // The boot guard end-to-end over the real store (the pure decision is tested above; this exercises // writeRelease → storedRelease → applyPending against the DB). We stamp the store NEWER than the code // and confirm applyPending refuses to open it. We only exercise the REFUSE path — it raises before any From 960c41104727e772534899da32cfb4b88bbb4dc0 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 18:27:41 -0400 Subject: [PATCH 028/172] sync: surface unparseable peer ops instead of dropping them silently MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The receive-side append builtins (packageOps/branchOps/resolutions) `List.choose` away any event/commit they can't parse. Those rows are dropped, not counted as applied — yet the pull cursor still advances past them, so a peer that ships a malformed op silently diverges the two stores with nothing recorded. The old comment even mislabelled the skips as "correctly count as applied"; they don't. Emit a visible warning at each skip site (`sync: skipped an unparseable from a peer (dropped, not applied) …`) so a divergence is diagnosable instead of silent. This is the stopgap; the real fix — quarantine the op + retry per-op and don't advance the cursor past it — is the structural per-op-isolation change tracked in CLEANUP(sync-security) / the fix proposals, and also closes the same-name-branch and cross-log-batch jams. Additive (fires only on a parse failure); MultiInstance + append path green. Co-Authored-By: Claude Opus 4.8 --- .../Builtins/Builtins.Matter/Libs/Sqlite.fs | 35 +++++++++++++++---- 1 file changed, 29 insertions(+), 6 deletions(-) diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs b/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs index 714cdd0892..e4d502aa87 100644 --- a/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs +++ b/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs @@ -213,6 +213,16 @@ let private recField (name : string) (fields : Map) : string = "eventLog record missing expected string field" [ "field", name ] +/// A peer sent a `kind` row (op / commit / resolution) we can't parse. Peers are fully trusted for now, so +/// the append skips it rather than crash the pull — but that must be VISIBLE, not silent: a skipped row is +/// dropped while the pull cursor still advances past it, so on divergence the operator needs to see it. +/// (The proper hardening — quarantine + retry per-op instead of skip — is tracked in CLEANUP(sync-security).) +let private warnSkippedSyncRow (kind : string) : unit = + System.Console.Error.WriteLine( + $"sync: skipped an unparseable {kind} from a peer (dropped, not applied). This can diverge the store; " + + "re-pull once the peer is fixed." + ) + let fns () : List = [ { name = fn "sqliteExec" 0 typeParams = [] @@ -419,8 +429,11 @@ let fns () : List = recField "createdAt" f ) with _ -> + warnSkippedSyncRow "commit" None - | _ -> None) + | _ -> + warnSkippedSyncRow "commit" + None) let parsedEvents = events @@ -436,16 +449,20 @@ let fns () : List = recField "originTs" f ) with _ -> + warnSkippedSyncRow "package op" None - | _ -> None) + | _ -> + warnSkippedSyncRow "package op" + None) try let! applied = LibDB.Seed.receiveOps parsedCommits parsedEvents return Dval.int (bigint applied) with _ -> // -1 = a DB error applying the batch (distinct from 0 = idempotent/nothing new). The puller - // must NOT advance the cursor on this, or the ops are silently skipped (divergence). Parse-skips - // of individual bad ops already happened above (List.choose) — those correctly count as applied. + // must NOT advance the cursor on this, or the ops are silently skipped (divergence). Any + // individually unparseable ops were skipped above and surfaced via warnSkippedSyncRow — they are + // dropped (not applied) while the cursor still advances, so they're logged, not silently lost. return Dval.int (bigint -1L) } | _ -> incorrectArgs ()) @@ -527,8 +544,11 @@ let fns () : List = recField "originTs" f ) with _ -> + warnSkippedSyncRow "branch op" None - | _ -> None) + | _ -> + warnSkippedSyncRow "branch op" + None) try let! applied = LibDB.Seed.receiveBranchOps parsed @@ -620,8 +640,11 @@ let fns () : List = recField "at" f ) with _ -> + warnSkippedSyncRow "resolution" None - | _ -> None) + | _ -> + warnSkippedSyncRow "resolution" + None) try let! applied = LibDB.Resolutions.receiveResolutions parsed From 17e590e60e591e3eb4bba892595a16cb8c76cc61 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 18:32:31 -0400 Subject: [PATCH 029/172] tests: prove a durable Release migrates a store in place, preserving data MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The CLI's data-preserving upgrade path (planCliUpgrade MigrateInPlace -> applyPending -> applyRelease's durable branch) was unit-tested at the routing level but never exercised end-to-end on real data — the only shipped Release (3) is a clean-break, so the durable branch had never fired. Add a MultiInstance test over an isolated seeded store: apply a synthetic durable Release (an additive schema column, no clean-break) and assert the column lands in place, every op is preserved (not cleared), and the projected package content still resolves. Closes the "durable path unfired" gap and guards applyRelease's durable branch against regressions. MultiInstance now 18 (was 17). Co-Authored-By: Claude Opus 4.8 --- backend/tests/Tests/MultiInstance.Tests.fs | 44 ++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/backend/tests/Tests/MultiInstance.Tests.fs b/backend/tests/Tests/MultiInstance.Tests.fs index b4a072ecdd..c213d151b1 100644 --- a/backend/tests/Tests/MultiInstance.Tests.fs +++ b/backend/tests/Tests/MultiInstance.Tests.fs @@ -766,6 +766,50 @@ let tests = teardown insts } + testTask + "a durable Release migrates a seeded store IN PLACE, preserving its data (not a clean-break)" { + // Guards the CLI data-preserving upgrade path (planCliUpgrade MigrateInPlace -> applyPending -> + // applyRelease's durable branch). A durable step (here an additive schema column) must land on an + // EXISTING store and keep every op + its projected content — unlike a clean-break, which clears. + let mutable insts : List = [] + try + let! a = seededInstance "durablemig" + insts <- [ a ] + activate a + let countOps () = + Sql.query "SELECT COUNT(*) AS n FROM package_ops" + |> Sql.executeRowAsync (fun read -> read.int64 "n") + let! opsBefore = countOps () + let! probeFn = undeprecatedFunctionHash () + Expect.isGreaterThan opsBefore 0L "the seeded store has ops to preserve" + + LibDB.Releases.applyRelease + ({ n = 999 + sql = "ALTER TABLE package_ops ADD COLUMN migration_probe TEXT" + reserialize = None + clearForRebuild = false } + : LibDB.Releases.Release) + + let! hasCol = + Sql.query + "SELECT COUNT(*) AS n FROM pragma_table_info('package_ops') WHERE name = 'migration_probe'" + |> Sql.executeRowAsync (fun read -> read.int64 "n") + let! opsAfter = countOps () + let! fnStillThere = + Sql.query "SELECT COUNT(*) AS n FROM package_functions WHERE hash = @h" + |> Sql.parameters [ "h", Sql.string probeFn ] + |> Sql.executeRowAsync (fun read -> read.int64 "n") + + Expect.equal hasCol 1L "the durable schema step added the column in place" + Expect.equal + opsAfter + opsBefore + "every op preserved (durable is not a clean-break — nothing cleared)" + Expect.equal fnStillThere 1L "the package content survived the in-place migration" + finally + teardown insts + } + testTask "branch merge syncs across stores: a branch's create + merge land on B (merged_at set)" { let mutable insts : List = [] From 84cecabaa17696e83f2d1d251711fc3f24384d05 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 18:39:47 -0400 Subject: [PATCH 030/172] cli: carry the peer list forward across a reseed (upgrade papercut) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit A clean-break reseed replaces data.db, which holds the sync peer list (sync_peers_v0) — so after an upgrade `dark sync` reported "you're not syncing with anyone yet" and the user had to re-add every peer. Peers are sync CONFIG, not disposable package content, so carry the peer URLs from the backed-up store into the fresh one (best-effort: if the table's absent or the copy fails, the reseed still succeeds). Cursors are deliberately NOT carried — a clean break means the fresh store must re-pull from scratch, so a stale cursor would skip ops. The reseed message now reports how many peers were kept. Found on a two-machine test: authored on B, reseeded A, re-pulled → data came back but A's peer to B was gone. This keeps it. Co-Authored-By: Claude Opus 4.8 --- backend/src/Cli/EmbeddedResources.fs | 60 +++++++++++++++++++++++++--- 1 file changed, 54 insertions(+), 6 deletions(-) diff --git a/backend/src/Cli/EmbeddedResources.fs b/backend/src/Cli/EmbeddedResources.fs index 77c1364b86..2c7d64098f 100644 --- a/backend/src/Cli/EmbeddedResources.fs +++ b/backend/src/Cli/EmbeddedResources.fs @@ -117,9 +117,52 @@ let private readStoredRelease (dbPath : string) : StoreRelease = with _ -> Unreadable -/// Move the stale store (and its WAL/SHM sidecars, so a leftover WAL can't attach to the new db) aside to -/// a timestamped backup, then re-extract the embedded current-Release seed. Returns the backup path. -let private reseedStore (dbPath : string) (storedLabel : string) : string = +/// The peer URLs configured in a store, or [] if the table is absent / unreadable. Peers are sync CONFIG +/// (owned by `sync_peers_v0` in packages/darklang/sync.dark), not disposable package content. +let private readPeerUrls (path : string) : List = + try + use conn = + new Microsoft.Data.Sqlite.SqliteConnection( + $"Data Source={path};Mode=ReadOnly;Pooling=false" + ) + conn.Open() + use cmd = conn.CreateCommand() + cmd.CommandText <- "SELECT url FROM sync_peers_v0" + use reader = cmd.ExecuteReader() + [ while reader.Read() do + yield reader.GetString 0 ] + with _ -> + [] + +/// Best-effort: carry the peer URLs from the backed-up store into the fresh one, so a clean-break upgrade +/// doesn't make you re-add your peers. Cursors are deliberately NOT carried — a clean break means the fresh +/// store must re-pull from scratch, so a stale cursor would skip ops. Returns how many peers were carried. +let private carryForwardPeers (backupPath : string) (dbPath : string) : int = + let urls = readPeerUrls backupPath + if List.isEmpty urls then + 0 + else + try + use conn = + new Microsoft.Data.Sqlite.SqliteConnection($"Data Source={dbPath};Pooling=false") + conn.Open() + use create = conn.CreateCommand() + create.CommandText <- + "CREATE TABLE IF NOT EXISTS sync_peers_v0 (url TEXT PRIMARY KEY)" + create.ExecuteNonQuery() |> ignore + for url in urls do + use ins = conn.CreateCommand() + ins.CommandText <- "INSERT OR IGNORE INTO sync_peers_v0 (url) VALUES ($u)" + ins.Parameters.AddWithValue("$u", url) |> ignore + ins.ExecuteNonQuery() |> ignore + List.length urls + with _ -> + 0 + +/// Move the stale store (and its WAL/SHM sidecars, so a leftover WAL can't attach to the new db) aside to a +/// timestamped backup, then re-extract the embedded current-Release seed and carry the peer list forward. +/// Returns (backup path, number of peers carried). +let private reseedStore (dbPath : string) (storedLabel : string) : string * int = let stamp = DateTime.UtcNow.ToString("yyyyMMddHHmmss") let backup = $"{dbPath}.{storedLabel}-{stamp}.bak" File.Move(dbPath, backup) @@ -127,7 +170,8 @@ let private reseedStore (dbPath : string) (storedLabel : string) : string = let side = dbPath + suffix if File.Exists side then File.Move(side, backup + suffix) extractGzippedResource "data.db.gz" dbPath - backup + let peers = carryForwardPeers backup dbPath + (backup, peers) /// Back up + re-seed the store, then tell the user what happened and how to repopulate it. let private reseedAndReport @@ -135,10 +179,14 @@ let private reseedAndReport (current : int) (storedLabel : string) : unit = - let backup = reseedStore dbPath storedLabel + let (backup, peers) = reseedStore dbPath storedLabel eprintfn $"Upgraded this data directory to Release {current} (was {storedLabel}); previous store backed up to {backup}." - eprintfn "Re-connect and pull from your peers, or re-author, to repopulate it." + if peers > 0 then + eprintfn + $"Kept your {peers} peer connection(s) — run `dark sync` to re-pull and repopulate." + else + eprintfn "Re-connect and pull from your peers, or re-author, to repopulate it." /// Reconcile an existing store's Release with this binary's. Called only when data.db already exists. let private reconcileExistingStore (dbPath : string) : unit = From 1e8c6feea86082f25b509591af21ba02a1810618 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 22:25:16 -0400 Subject: [PATCH 031/172] =?UTF-8?q?sqlite:=20collapse=20the=20exec/query?= =?UTF-8?q?=20param=20split=20(4=20builtins=20=E2=86=92=202)?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit sqliteExec/sqliteExecP and sqliteQuery/sqliteQueryP differed only by a params list. Fold each pair into one builtin taking `params: List` ([] for none), halving the raw-SQLite builtin surface (4 → 2). The .dark Stdlib.Sqlite.exec/execP/query/queryP convenience wrappers stay, so no caller changes: execP/queryP are the sole builtin callers and exec/query delegate to them — keeping each builtin to a single package reference (no multiUseAllowlist entry needed). Full suite green. Co-Authored-By: Claude Opus 4.8 --- .../Builtins/Builtins.Matter/Libs/Sqlite.fs | 64 ++++++------------- packages/darklang/stdlib/sqlite.dark | 28 ++++---- 2 files changed, 33 insertions(+), 59 deletions(-) diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs b/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs index e4d502aa87..7de476d39a 100644 --- a/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs +++ b/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs @@ -1,9 +1,10 @@ /// Raw SQLite access from Darklang — the `Stdlib.Sqlite` floor primitive that lets sync/SCM policy live in /// Dark over an ordinary database, plus the native op-log read/append + blob-channel builtins sync rides on. /// -/// Surface: `sqliteExec`/`sqliteQuery` (no params) and `sqliteExecP`/`sqliteQueryP` (positional params bound -/// to @p0..@pN — the injection-safe way to pass values). `exec` returns rows affected; `query` returns each -/// row as `Dict` (cells stringified so the row is homogeneous). +/// Surface: `sqliteExec` (DDL/DML → rows affected) and `sqliteQuery` (SELECT → each row as a typed +/// `Dict`), each taking a `params` list bound to @p0..@pN (injection-safe; [] for none). The `.dark` +/// `Stdlib.Sqlite.exec/execP/query/queryP` wrappers layer the with/without-params convenience on top, so +/// there's one builtin per operation rather than four. /// /// The `sqlite*` builtins open a caller-supplied file path, so they declare `Needs.fileReadWrite` (the CLI host /// grants it; untrusted `dark run` under a narrowed grant is denied). They still don't scope to a SPECIFIC @@ -224,35 +225,21 @@ let private warnSkippedSyncRow (kind : string) : unit = ) let fns () : List = + // Two raw-SQLite primitives — exec (DDL/DML) and query (SELECT) — each binding @p0..@pN params + // (injection-safe; pass [] for none). The `.dark` Stdlib.Sqlite.exec/execP/query/queryP wrappers layer the + // with-params / without-params convenience on top, so there's one builtin per operation rather than four. [ { name = fn "sqliteExec" 0 typeParams = [] parameters = [ Param.make "path" TString "the SQLite file to open" + Param.make "sql" TString "a statement to run (CREATE/INSERT/UPDATE/DELETE…)" Param.make - "sql" - TString - "a statement to run (CREATE/INSERT/UPDATE/DELETE…)" ] - returnType = TypeReference.result TInt TString - description = - "Opens the SQLite file at and runs . Ok = rows affected; Error = the SQLite message. Never throws." - fn = - (function - | _, _, _, [ DString path; DString sql ] -> execImpl path sql [] - | _ -> incorrectArgs ()) - sqlSpec = NotQueryable - previewable = Impure - capabilities = LibExecution.Capabilities.Needs.fileReadWrite - deprecated = NotDeprecated } - - { name = fn "sqliteExecP" 0 - typeParams = [] - parameters = - [ Param.make "path" TString "the SQLite file to open" - Param.make "sql" TString "a statement with @p0..@pN placeholders" - Param.make "params" (TList TString) "values bound to @p0..@pN, in order" ] + "params" + (TList TString) + "values bound to @p0..@pN placeholders, in order (injection-safe); [] for none" ] returnType = TypeReference.result TInt TString description = - "Like but binds to @p0..@pN placeholders (injection-safe). Ok = rows affected; Error = message." + "Opens the SQLite file at and runs , binding to @p0..@pN placeholders (injection-safe; pass [] for none). Ok = rows affected; Error = the SQLite message. Never throws." fn = (function | _, _, _, [ DString path; DString sql; DList(_, ps) ] -> @@ -267,29 +254,14 @@ let fns () : List = typeParams = [] parameters = [ Param.make "path" TString "the SQLite file to open" - Param.make "sql" TString "a SELECT to run" ] - returnType = TypeReference.result (TList(TDict Value.typeRef)) TString - description = - "Opens the SQLite file at and runs the SELECT . Ok = each row as a dict of " - + "column-name to its typed value; Error = the SQLite message. Never throws." - fn = - (function - | _, _, _, [ DString path; DString sql ] -> queryImpl path sql [] - | _ -> incorrectArgs ()) - sqlSpec = NotQueryable - previewable = Impure - capabilities = LibExecution.Capabilities.Needs.fileReadWrite - deprecated = NotDeprecated } - - { name = fn "sqliteQueryP" 0 - typeParams = [] - parameters = - [ Param.make "path" TString "the SQLite file to open" - Param.make "sql" TString "a SELECT with @p0..@pN placeholders" - Param.make "params" (TList TString) "values bound to @p0..@pN, in order" ] + Param.make "sql" TString "a SELECT to run" + Param.make + "params" + (TList TString) + "values bound to @p0..@pN placeholders, in order (injection-safe); [] for none" ] returnType = TypeReference.result (TList(TDict Value.typeRef)) TString description = - "Like but binds to @p0..@pN placeholders (injection-safe). Ok = rows; Error = message." + "Opens the SQLite file at and runs the SELECT , binding to @p0..@pN placeholders (injection-safe; pass [] for none). Ok = each row as a dict of column-name to its typed value; Error = the SQLite message. Never throws." fn = (function | _, _, _, [ DString path; DString sql; DList(_, ps) ] -> diff --git a/packages/darklang/stdlib/sqlite.dark b/packages/darklang/stdlib/sqlite.dark index 61d5195cd6..be5e935b4e 100644 --- a/packages/darklang/stdlib/sqlite.dark +++ b/packages/darklang/stdlib/sqlite.dark @@ -28,29 +28,31 @@ let asInt (v: Value) : Stdlib.Option.Option = /// Run a statement (CREATE/INSERT/UPDATE/DELETE/DDL) against the SQLite file at /// ; returns the number of rows affected. Users call this, not the /// raw builtin. -let exec (dbPath: String) (sql: String) : Stdlib.Result.Result = - Builtin.sqliteExec dbPath sql - /// Like but binds to @p0..@pN placeholders in , -/// so values are never string-spliced into SQL (injection-safe). +/// so values are never string-spliced into SQL (injection-safe). The single caller of the exec builtin — +/// delegates here — so the builtin keeps exactly one package reference. let execP (dbPath: String) (sql: String) (params: List) : Stdlib.Result.Result = - Builtin.sqliteExecP dbPath sql params + Builtin.sqliteExec dbPath sql params -/// Run a SELECT against ; returns each row as a dict of column name -/// to a typed (so ints/reals/blobs keep their types). -let query +let exec (dbPath: String) (sql: String) : Stdlib.Result.Result = + execP dbPath sql [] + +/// Like but binds to @p0..@pN placeholders (injection-safe). The single caller of +/// the query builtin — delegates here. +let queryP (dbPath: String) (sql: String) + (params: List) : Stdlib.Result.Result>, String> = - Builtin.sqliteQuery dbPath sql + Builtin.sqliteQuery dbPath sql params -/// Like but binds to @p0..@pN placeholders (injection-safe). -let queryP +/// Run a SELECT against ; returns each row as a dict of column name +/// to a typed (so ints/reals/blobs keep their types). +let query (dbPath: String) (sql: String) - (params: List) : Stdlib.Result.Result>, String> = - Builtin.sqliteQueryP dbPath sql params + queryP dbPath sql [] // ── convenience layer (pure Dark on top of exec/query) ────────────────────────────────────────────── From 62a9eefa1f61ad990de15583b221d562e2433d6e Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 22:25:16 -0400 Subject: [PATCH 032/172] =?UTF-8?q?tests:=20drop=20the=20trivial=20EventLo?= =?UTF-8?q?g=20testfile;=20rename=20sync-per-branch=20=E2=86=92=20sync-uni?= =?UTF-8?q?t?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit - Delete testfiles/execution/stdlib/eventlog.dark: it only asserted readSince from a nonsense past-the-end cursor leaves the cursor unchanged — never reading real ops or checking the cursor advances. The real path is covered in OpsProjections.Tests. - Rename sync-per-branch.dark → sync-unit.dark: the per-branch (follow/private) controls it was named for were removed (sync is wholesale); it's now general sync unit tests. Co-Authored-By: Claude Opus 4.8 --- .../cli/{sync-per-branch.dark => sync-unit.dark} | 0 backend/testfiles/execution/stdlib/eventlog.dark | 10 ---------- 2 files changed, 10 deletions(-) rename backend/testfiles/execution/cli/{sync-per-branch.dark => sync-unit.dark} (100%) delete mode 100644 backend/testfiles/execution/stdlib/eventlog.dark diff --git a/backend/testfiles/execution/cli/sync-per-branch.dark b/backend/testfiles/execution/cli/sync-unit.dark similarity index 100% rename from backend/testfiles/execution/cli/sync-per-branch.dark rename to backend/testfiles/execution/cli/sync-unit.dark diff --git a/backend/testfiles/execution/stdlib/eventlog.dark b/backend/testfiles/execution/stdlib/eventlog.dark deleted file mode 100644 index 489ef1d8a2..0000000000 --- a/backend/testfiles/execution/stdlib/eventlog.dark +++ /dev/null @@ -1,10 +0,0 @@ -// The native op-log read API (`Stdlib.EventLog`) that sync reads from. Reading past the end of the log -// leaves the cursor unchanged — the "already current" shape a peer serves a caught-up puller. The full -// readSince→append→converge path (origin_ts preservation + fold) is covered in the F# suite -// (OpsProjections.Tests); this pins the Dark-side read contract. - -module EventLog = - ((Stdlib.EventLog.readSince - (Stdlib.EventLog.cursorFromInt 999999999L) - 500L) - |> (fun b -> Stdlib.EventLog.cursorToInt b.next)) = 999999999L From dc27f38a29168a9cd0e1f8fe8d98fd8a1f6e983d Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 22:29:57 -0400 Subject: [PATCH 033/172] PR review: reword command descriptions + tidy comments - core.dark: shorter command descriptions (login/sync/ops). - servers.dark: reformat the sync-server comment as a doc comment. - log.dark: drop the committer explanatory comment. - ProgramTypes.fs: whitespace. --- backend/src/LibExecution/ProgramTypes.fs | 1 + packages/darklang/cli/apps/servers.dark | 7 ++++--- packages/darklang/cli/core.dark | 6 +++--- packages/darklang/cli/scm/log.dark | 2 -- 4 files changed, 8 insertions(+), 8 deletions(-) diff --git a/backend/src/LibExecution/ProgramTypes.fs b/backend/src/LibExecution/ProgramTypes.fs index 8bf574fbb0..a912e7cae6 100644 --- a/backend/src/LibExecution/ProgramTypes.fs +++ b/backend/src/LibExecution/ProgramTypes.fs @@ -742,6 +742,7 @@ type PackageOp = + /// The kind of package item (function, type, or value) and ItemKind = | Fn diff --git a/packages/darklang/cli/apps/servers.dark b/packages/darklang/cli/apps/servers.dark index c304307434..ddad3dbfdd 100644 --- a/packages/darklang/cli/apps/servers.dark +++ b/packages/darklang/cli/apps/servers.dark @@ -27,8 +27,9 @@ let darkPackages (name: String) : Unit = let demoHttp (name: String) : Unit = httpDaemon name 9091 "HttpServerTest.router" Darklang.DemoData.HttpServerTest.router -// `sync-server` — serve your ops over HTTP so peers can pull from you (the serving side of `dark sync`, the -// boot-persistent twin of `dark sync serve`). Defaults to 9000 (matches `dark sync serve`); override via -// config `apps.sync-server.port`. +/// `sync-server`: +/// serve your ops over HTTP so peers can pull from you +/// (the serving side of `dark sync`, the boot-persistent twin of `dark sync serve`). +/// Defaults to 9000 (matches `dark sync serve`); override via config `apps.sync-server.port`. let syncServer (name: String) : Unit = httpDaemon name 9000 "Sync.Server.router" Darklang.Sync.Server.router diff --git a/packages/darklang/cli/core.dark b/packages/darklang/cli/core.dark index 8809b61475..8a8df78bc9 100644 --- a/packages/darklang/cli/core.dark +++ b/packages/darklang/cli/core.dark @@ -275,12 +275,12 @@ module Registry = ("review", "Review branch changesets", [], SCM.Review.App.execute, SCM.Review.App.help, SCM.Review.App.complete) ("conflicts", "Review + resolve sync divergences", [], Conflicts.execute, Conflicts.help, Conflicts.complete) ("views", "Browse and preview CLI views", [], Apps.Views.App.execute, Apps.Views.App.help, Apps.Views.App.complete) - ("login", "Log in as a seeded account (required for commit)", [], Auth.Login.execute, Auth.Login.help, Auth.Login.complete) + ("login", "Log into an account", [], Auth.Login.execute, Auth.Login.help, Auth.Login.complete) ("logout", "Clear the active account", [], Auth.Logout.execute, Auth.Logout.help, Auth.Logout.complete) ("caps", "View + control this instance's capability grant (default NONE)", [ "capabilities" ], Caps.Command.execute, Caps.Command.help, Caps.Command.complete) ("devices", "Your tailnet devices (status / serve / ping), over the `tailscale` CLI", [], Devices.execute, Devices.help, Devices.complete) - ("sync", "Share package changes with your other instances (local-first)", [], Sync.execute, Sync.help, Sync.complete) - ("ops", "Inspect this instance's op log, read live from SQLite", [], Ops.execute, Ops.help, Ops.complete) + ("sync", "Share package changes with other Darklang instances", [], Sync.execute, Sync.help, Sync.complete) + ("ops", "Inspect this instance's op log", [], Ops.execute, Ops.help, Ops.complete) ("apps", "List, install, and manage apps (daemons, foreground, UI)", [], Apps.Command.execute, Apps.Command.help, Apps.Command.complete) ("text-editor", "Demo: a tiny text editor (the outliner's widget surfaced as an app)", [], Apps.Examples.TextEdit.execute, Apps.Examples.TextEdit.help, Apps.Examples.TextEdit.complete) ] |> Stdlib.List.map( diff --git a/packages/darklang/cli/scm/log.dark b/packages/darklang/cli/scm/log.dark index fd170aeace..881fe70675 100644 --- a/packages/darklang/cli/scm/log.dark +++ b/packages/darklang/cli/scm/log.dark @@ -28,8 +28,6 @@ let execute (state: AppState) (args: List) : AppState = let isAncestor = commitBranchId != currentBranchIdStr && commitBranchId != "" - // Show the committer — the account that authored the commit (resolved from accounts, synced across - // instances), so on a shared/multi-user tailnet you can see WHO made each change, not just what + when. if isAncestor then Stdlib.printLine $"{Cli.Colors.dim}{id} {createdAt} {c.committerName} ({opCount} ops) [{c.branchName}]{Cli.Colors.reset}" Stdlib.printLine $"{Cli.Colors.dim} {c.message}{Cli.Colors.reset}" From ba7858b72a18cdcedec637af05dc99d9b762d157 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 22:48:12 -0400 Subject: [PATCH 034/172] builtins: split the sync natives out of Libs/Sqlite.fs into Libs/Sync.fs MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sqlite.fs had become a grab-bag: generic SQLite access + the sync machinery (op-log read/append natives, the blob channel, localDbPath, currentRelease). Only the generic SQLite floor (sqliteExec/sqliteQuery) belongs there. Move the 12 sync builtins + their helpers to a new Libs/Sync.fs (registered after Sqlite), leaving Sqlite.fs as just the general-purpose primitive. Builtins are name-registered, so no .dark caller changes; suite green (9,958). (The .dark side — rehoming Stdlib.EventLog + the localDbPath/currentRelease wrappers out of Stdlib — follows separately.) Co-Authored-By: Claude Opus 4.8 --- .../src/Builtins/Builtins.Matter/Builtin.fs | 3 + .../Builtins.Matter/Builtins.Matter.fsproj | 1 + .../Builtins/Builtins.Matter/Libs/Sqlite.fs | 585 +---------------- .../src/Builtins/Builtins.Matter/Libs/Sync.fs | 599 ++++++++++++++++++ 4 files changed, 607 insertions(+), 581 deletions(-) create mode 100644 backend/src/Builtins/Builtins.Matter/Libs/Sync.fs diff --git a/backend/src/Builtins/Builtins.Matter/Builtin.fs b/backend/src/Builtins/Builtins.Matter/Builtin.fs index 3251ecf415..61033fa93e 100644 --- a/backend/src/Builtins/Builtins.Matter/Builtin.fs +++ b/backend/src/Builtins/Builtins.Matter/Builtin.fs @@ -18,6 +18,9 @@ let builtins (pm : PT.PackageManager) : Builtins = // Sqlite (raw SQLite access — the Stdlib.Sqlite floor primitive spike) Libs.Sqlite.builtins () + // Sync (internal: op-log read/append wire, blob channel, store path + Release coordinate) + Libs.Sync.builtins () + // Conflicts (dark conflicts — the sync Conflict/Resolution UX) Libs.Conflicts.builtins () diff --git a/backend/src/Builtins/Builtins.Matter/Builtins.Matter.fsproj b/backend/src/Builtins/Builtins.Matter/Builtins.Matter.fsproj index 424df66f0e..7cb9711d3a 100644 --- a/backend/src/Builtins/Builtins.Matter/Builtins.Matter.fsproj +++ b/backend/src/Builtins/Builtins.Matter/Builtins.Matter.fsproj @@ -27,6 +27,7 @@ + diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs b/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs index 7de476d39a..b59e9986a5 100644 --- a/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs +++ b/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs @@ -1,5 +1,6 @@ -/// Raw SQLite access from Darklang — the `Stdlib.Sqlite` floor primitive that lets sync/SCM policy live in -/// Dark over an ordinary database, plus the native op-log read/append + blob-channel builtins sync rides on. +/// Raw, general-purpose SQLite access from Darklang — the `Stdlib.Sqlite` floor primitive that lets policy +/// live in Dark over an ordinary database. (The internal sync machinery — op-log read/append, blob channel, +/// store path + Release coordinate — lives in `Libs/Sync.fs`, not here.) /// /// Surface: `sqliteExec` (DDL/DML → rows affected) and `sqliteQuery` (SELECT → each row as a typed /// `Dict`), each taking a `params` list bound to @p0..@pN (injection-safe; [] for none). The `.dark` @@ -122,108 +123,6 @@ let private queryImpl return Dval.resultError rowsKT KTString (DString e.Message) } -module EventLogRefs = LibExecution.PackageRefs.Type.Stdlib.EventLog -let private eventLogEventType () = FQTypeName.fqPackage (EventLogRefs.event ()) -let private eventLogCommitType () = FQTypeName.fqPackage (EventLogRefs.commit ()) -let private eventLogCursorType () = FQTypeName.fqPackage (EventLogRefs.cursor ()) - -/// Build the `Stdlib.EventLog.Event` record for one op row — natively, so a 1000-op batch never pays the -/// per-row Dark interpreter cost the native read exists to avoid. -let private eventRecord - ((id, op, br, ch, ts) : string * string * string * string * string) - : Dval = - let t = eventLogEventType () - DRecord( - t, - t, - [], - Map - [ "id", DString id - "op", DString op - "branchId", DString br - "commitHash", DString ch - "originTs", DString ts ] - ) - -let private commitRecord - ((hash, msg, br, acct, at) : string * string * string * string * string) - : Dval = - let t = eventLogCommitType () - DRecord( - t, - t, - [], - Map - [ "hash", DString hash - "message", DString msg - "branchId", DString br - "accountId", DString acct - "createdAt", DString at ] - ) - -let private cursorValue (n : int64) : Dval = - let t = eventLogCursorType () - DEnum(t, t, [], "Cursor", [ DInt64 n ]) - -let private branchOpEventType () = - FQTypeName.fqPackage (EventLogRefs.branchOpEvent ()) - -/// Build the `Stdlib.EventLog.BranchOpEvent` record for one branch_ops row — natively (no per-row Dark cost). -let private branchOpEventRecord - ((id, op, originTs) : string * string * string) - : Dval = - let t = branchOpEventType () - DRecord( - t, - t, - [], - Map [ "id", DString id; "op", DString op; "originTs", DString originTs ] - ) - -let private resolutionEventType () = - FQTypeName.fqPackage (EventLogRefs.resolutionEvent ()) - -/// Build the `Stdlib.EventLog.ResolutionEvent` record for one resolutions row. -let private resolutionEventRecord - ((id, branchId, location, itemKind, chosenHash, resolvedBy, at) : - string * string * string * string * string * string * string) - : Dval = - let t = resolutionEventType () - - DRecord( - t, - t, - [], - Map - [ "id", DString id - "branchId", DString branchId - "location", DString location - "itemKind", DString itemKind - "chosenHash", DString chosenHash - "resolvedBy", DString resolvedBy - "at", DString at ] - ) - -/// Read a string field out of an EventLog Event/Commit record (built by the peer + parsed from JSON) — -/// natively, so appending a 1000-op batch never pays the per-row Dark interpreter cost. -let private recField (name : string) (fields : Map) : string = - match Map.tryFind name fields with - | Some(DString s) -> s - | _ -> - Exception.raiseInternal - "eventLog record missing expected string field" - [ "field", name ] - -/// A peer sent a `kind` row (op / commit / resolution) we can't parse. Peers are fully trusted for now, so -/// the append skips it rather than crash the pull — but that must be VISIBLE, not silent: a skipped row is -/// dropped while the pull cursor still advances past it, so on divergence the operator needs to see it. -/// (The proper hardening — quarantine + retry per-op instead of skip — is tracked in CLEANUP(sync-security).) -let private warnSkippedSyncRow (kind : string) : unit = - System.Console.Error.WriteLine( - $"sync: skipped an unparseable {kind} from a peer (dropped, not applied). This can diverge the store; " - + "re-pull once the peer is fixed." - ) - let fns () : List = // Two raw-SQLite primitives — exec (DDL/DML) and query (SELECT) — each binding @p0..@pN params // (injection-safe; pass [] for none). The `.dark` Stdlib.Sqlite.exec/execP/query/queryP wrappers layer the @@ -271,482 +170,6 @@ let fns () : List = previewable = Impure capabilities = LibExecution.Capabilities.Needs.fileReadWrite deprecated = NotDeprecated } - - // This instance's OWN package store path (data.db). The op-log builtins write ops here; the sync config - // tables (sync_peers/sync_cursors) live here too — the daemon/CLI don't have to know the path. - { name = fn "localDbPath" 0 - typeParams = [] - parameters = [ Param.make "unit" TUnit "" ] - returnType = TString - description = "The file path of this instance's own package store (data.db)." - fn = - (function - | _, _, _, [ DUnit ] -> uply { return DString LibConfig.Config.dbPath } - | _ -> incorrectArgs ()) - sqlSpec = NotQueryable - previewable = Impure - capabilities = LibExecution.Capabilities.noCaps - deprecated = NotDeprecated } - - // The Release (store format/version coordinate: language + op-format + schema + hashing) this Dark - // binary speaks. Compared against the store's stamped Release for the upgrade/`dark version` surface. - { name = fn "currentRelease" 0 - typeParams = [] - parameters = [ Param.make "unit" TUnit "" ] - returnType = TInt - description = "The Release (store format/version) this Dark binary speaks." - fn = - (function - | _, _, _, [ DUnit ] -> - uply { return Dval.int (bigint LibDB.Releases.currentRelease) } - | _ -> incorrectArgs ()) - sqlSpec = NotQueryable - previewable = Impure - capabilities = LibExecution.Capabilities.noCaps - deprecated = NotDeprecated } - - // ── native op-log read/append + blob-channel builtins (the ops-queue seam sync rides on) ── - // CLEANUP(sync-builtins): these operate on the FIXED local store (not an arbitrary path) and still declare - // noCaps, so untrusted `dark run` can read/append the op log. Lower-risk than the arbitrary-path sqlite* above - // (can't touch other files), but when these are reorganized around a first-class ops-queue they should carry - // a real store capability too. - // - // The TYPED, stream-shaped read of the package op log: Event/Commit records + the resume Cursor, all built - // NATIVELY so a 1000-op batch never pays the per-row Dark interpreter cost. `EventLog.readSince` wraps this; - // the events Stream is drained (native loop) for the wire, and is filterable for branch-scoped reads. - { name = fn "packageOpsReadNative" 0 - typeParams = [ "c"; "e"; "cur" ] - parameters = - [ Param.make - "cursor" - TInt64 - "read events after this cursor (0 = from the start)" - Param.make "limit" TInt64 "at most this many events — one bounded batch" ] - returnType = - TTuple(TList(TVariable "c"), TStream(TVariable "e"), [ TVariable "cur" ]) - description = - "This instance's committed events after (at most ) as a Stream of Event records, the Commit records they reference, and the resume Cursor. Built natively — the fast typed read half of the op-log seam." - fn = - (function - | _, _, _, [ DInt64 cursor; DInt64 limit ] -> - uply { - let! (commits, events, newCursor) = LibDB.Seed.eventsSince cursor limit - - let commitsList = - List.map commitRecord commits - |> Dval.list (KTCustomType(eventLogCommitType (), [])) - - let remaining = ref (List.map eventRecord events) - - let nextFn () : Ply> = - uply { - match remaining.Value with - | head :: tail -> - remaining.Value <- tail - return Some head - | [] -> return None - } - - let eventStream = - LibExecution.Stream.newFromIO - (ValueType.Known(KTCustomType(eventLogEventType (), []))) - nextFn - None - - return DTuple(commitsList, eventStream, [ cursorValue newCursor ]) - } - | _ -> incorrectArgs ()) - sqlSpec = NotQueryable - previewable = Impure - capabilities = LibExecution.Capabilities.noCaps - deprecated = NotDeprecated } - - // The TYPED append: Commit + Event records received from a peer (parsed from JSON natively) folded into the - // package op log. Field extraction is native — a 1000-op pull never pays the per-row Dark cost. Returns the - // count newly applied (idempotent). `EventLog.append` wraps this. - { name = fn "packageOpsAppendNative" 0 - typeParams = [ "c"; "e" ] - parameters = - [ Param.make - "commits" - (TList(TVariable "c")) - "Commit records the events reference" - Param.make - "events" - (TList(TVariable "e")) - "Event records received from a peer" ] - returnType = TInt - description = - "Append received Commit + Event records to the op log (reconciling origin_ts to the MIN stamp for LWW convergence) + fold. Returns the count of ops newly applied. Idempotent. Extracts fields natively." - fn = - (function - | _, _, _, [ DList(_, commits); DList(_, events) ] -> - uply { - // Receive must be TOTAL against a malformed/hostile peer: skip any event/commit that won't parse - // (bad guid/hex), and catch a batch-level DB error (e.g. an FK to a row not in this batch) so the - // pull loop + background daemon survive instead of crashing. CLEANUP(sync-security): peers are - // FULLY TRUSTED for now — a future hardening should verify op ids against content + reject bad ops - // per-op (not skip the whole batch) + not trust the peer's account_id/commit_hash. - let parsedCommits = - commits - |> List.choose (fun c -> - match c with - | DRecord(_, _, _, f) -> - try - Some( - recField "hash" f, - recField "message" f, - System.Guid.Parse(recField "branchId" f), - System.Guid.Parse(recField "accountId" f), - recField "createdAt" f - ) - with _ -> - warnSkippedSyncRow "commit" - None - | _ -> - warnSkippedSyncRow "commit" - None) - - let parsedEvents = - events - |> List.choose (fun ev -> - match ev with - | DRecord(_, _, _, f) -> - try - Some( - System.Guid.Parse(recField "id" f), - System.Convert.FromHexString(recField "op" f), - System.Guid.Parse(recField "branchId" f), - recField "commitHash" f, - recField "originTs" f - ) - with _ -> - warnSkippedSyncRow "package op" - None - | _ -> - warnSkippedSyncRow "package op" - None) - - try - let! applied = LibDB.Seed.receiveOps parsedCommits parsedEvents - return Dval.int (bigint applied) - with _ -> - // -1 = a DB error applying the batch (distinct from 0 = idempotent/nothing new). The puller - // must NOT advance the cursor on this, or the ops are silently skipped (divergence). Any - // individually unparseable ops were skipped above and surfaced via warnSkippedSyncRow — they are - // dropped (not applied) while the cursor still advances, so they're logged, not silently lost. - return Dval.int (bigint -1L) - } - | _ -> incorrectArgs ()) - sqlSpec = NotQueryable - previewable = Impure - capabilities = LibExecution.Capabilities.noCaps - deprecated = NotDeprecated } - - // The branch-structure log (CreateBranch/CreateCommit/Rebase/Merge/Archive), read as a Stream of - // BranchOpEvent records + the resume Cursor. Branch ops are self-contained (no side commits). Peers apply - // these to LEARN branches — the structure that `packageOps` events reference by branch_id. - { name = fn "branchOpsReadNative" 0 - typeParams = [ "e"; "cur" ] - parameters = - [ Param.make - "cursor" - TInt64 - "read branch ops after this cursor (0 = from the start)" - Param.make "limit" TInt64 "at most this many — one bounded batch" ] - returnType = TTuple(TStream(TVariable "e"), TVariable "cur", []) - description = - "This instance's branch ops after as a Stream of BranchOpEvent records + the resume Cursor. Built natively." - fn = - (function - | _, _, _, [ DInt64 cursor; DInt64 limit ] -> - uply { - let! (events, newCursor) = LibDB.Seed.branchOpsSince cursor limit - - let remaining = ref (List.map branchOpEventRecord events) - - let nextFn () : Ply> = - uply { - match remaining.Value with - | head :: tail -> - remaining.Value <- tail - return Some head - | [] -> return None - } - - let stream = - LibExecution.Stream.newFromIO - (ValueType.Known(KTCustomType(branchOpEventType (), []))) - nextFn - None - - return DTuple(stream, cursorValue newCursor, []) - } - | _ -> incorrectArgs ()) - sqlSpec = NotQueryable - previewable = Impure - capabilities = LibExecution.Capabilities.noCaps - deprecated = NotDeprecated } - - // Apply branch ops RECEIVED from a peer (BranchOpEvent records) — fold into branches/commits. Idempotent. - { name = fn "branchOpsAppendNative" 0 - typeParams = [ "e" ] - parameters = - [ Param.make - "events" - (TList(TVariable "e")) - "BranchOpEvent records received from a peer" ] - returnType = TInt - description = - "Apply received BranchOpEvent records to the branch-ops log (fold into branches/commits). Returns the count processed. Idempotent." - fn = - (function - | _, _, _, [ DList(_, events) ] -> - uply { - // Total against a bad peer (see packageOpsAppendNative): skip unparseable events, catch batch errors. - let parsed = - events - |> List.choose (fun ev -> - match ev with - | DRecord(_, _, _, f) -> - try - Some( - recField "id" f, - System.Convert.FromHexString(recField "op" f), - recField "originTs" f - ) - with _ -> - warnSkippedSyncRow "branch op" - None - | _ -> - warnSkippedSyncRow "branch op" - None) - - try - let! applied = LibDB.Seed.receiveBranchOps parsed - return Dval.int (bigint applied) - with _ -> - // -1 = DB error (vs 0 = idempotent) so the puller stops without advancing this log's cursor. - return Dval.int (bigint -1L) - } - | _ -> incorrectArgs ()) - sqlSpec = NotQueryable - previewable = Impure - capabilities = LibExecution.Capabilities.noCaps - deprecated = NotDeprecated } - - // The resolutions log — synced override overlays. Peers apply these AFTER package ops so a human's - // "keep mine" decision converges everywhere. Read as a Stream of ResolutionEvent records + the cursor. - { name = fn "resolutionsReadNative" 0 - typeParams = [ "e"; "cur" ] - parameters = - [ Param.make - "cursor" - TInt64 - "read resolutions after this cursor (0 = from the start)" - Param.make "limit" TInt64 "at most this many — one bounded batch" ] - returnType = TTuple(TStream(TVariable "e"), TVariable "cur", []) - description = - "This instance's resolutions after as a Stream of ResolutionEvent records + the resume Cursor. Built natively." - fn = - (function - | _, _, _, [ DInt64 cursor; DInt64 limit ] -> - uply { - let! (events, newCursor) = - LibDB.Resolutions.resolutionsSince cursor limit - - let remaining = ref (List.map resolutionEventRecord events) - - let nextFn () : Ply> = - uply { - match remaining.Value with - | head :: tail -> - remaining.Value <- tail - return Some head - | [] -> return None - } - - let stream = - LibExecution.Stream.newFromIO - (ValueType.Known(KTCustomType(resolutionEventType (), []))) - nextFn - None - - return DTuple(stream, cursorValue newCursor, []) - } - | _ -> incorrectArgs ()) - sqlSpec = NotQueryable - previewable = Impure - capabilities = LibExecution.Capabilities.noCaps - deprecated = NotDeprecated } - - // Apply resolutions RECEIVED from a peer (ResolutionEvent records) — record + overlay onto locations. - // Idempotent (id-keyed) + LWW-gated by each resolution's `at`. - { name = fn "resolutionsAppendNative" 0 - typeParams = [ "e" ] - parameters = - [ Param.make - "events" - (TList(TVariable "e")) - "ResolutionEvent records received from a peer" ] - returnType = TInt - description = - "Apply received ResolutionEvent records (record + overlay onto locations). Returns the count processed. Idempotent." - fn = - (function - | _, _, _, [ DList(_, events) ] -> - uply { - let parsed = - events - |> List.choose (fun ev -> - match ev with - | DRecord(_, _, _, f) -> - try - Some( - recField "id" f, - recField "branchId" f, - recField "location" f, - recField "itemKind" f, - recField "chosenHash" f, - recField "resolvedBy" f, - recField "at" f - ) - with _ -> - warnSkippedSyncRow "resolution" - None - | _ -> - warnSkippedSyncRow "resolution" - None) - - try - let! applied = LibDB.Resolutions.receiveResolutions parsed - return Dval.int (bigint applied) - with _ -> - // -1 = DB error (vs 0 = idempotent) so the puller stops without advancing this log's cursor. - return Dval.int (bigint -1L) - } - | _ -> incorrectArgs ()) - sqlSpec = NotQueryable - previewable = Impure - capabilities = LibExecution.Capabilities.noCaps - deprecated = NotDeprecated } - - - // ── HTTP blob channel — package_blobs (a value's large content) don't ride the op stream, so after - // applying a peer's ops the puller fetches the blobs it now lacks. Content-addressed = idempotent. - - // Sender: the blob MANIFEST — every content hash this instance holds, newline-joined (GET /sync/blobs). - { name = fn "syncBlobManifest" 0 - typeParams = [] - parameters = [ Param.make "unit" TUnit "" ] - returnType = TString - description = - "The blob manifest (the GET /sync/blobs body): every content hash this instance holds, newline-joined." - fn = - (function - | _, _, _, [ DUnit ] -> - uply { - let! hashes = LibDB.RuntimeTypes.Blob.allHashes () - return DString(String.concat "\n" hashes) - } - | _ -> incorrectArgs ()) - sqlSpec = NotQueryable - previewable = Impure - capabilities = LibExecution.Capabilities.noCaps - deprecated = NotDeprecated } - - // Sender: the bytes for one hash, base64 (GET /sync/blob?hash=), or empty if this instance lacks it. - { name = fn "syncBlobBytes" 0 - typeParams = [] - parameters = [ Param.make "hash" TString "The content hash to fetch" ] - returnType = TString - description = - "The bytes for one content hash, base64-encoded (the GET /sync/blob?hash= body), or empty if this instance lacks it." - fn = - (function - | _, _, _, [ DString hash ] -> - uply { - match! LibDB.RuntimeTypes.Blob.get hash with - | Some bytes -> return DString(System.Convert.ToBase64String bytes) - | None -> return DString "" - } - | _ -> incorrectArgs ()) - sqlSpec = NotQueryable - previewable = Impure - capabilities = LibExecution.Capabilities.noCaps - deprecated = NotDeprecated } - - // Receiver: of a peer's offered hashes, which this instance LACKS — exactly the blobs to fetch. - { name = fn "syncBlobMissing" 0 - typeParams = [] - parameters = - [ Param.make - "hashes" - (TList TString) - "A peer's offered content hashes (its manifest)" ] - returnType = TList TString - description = - "Of the peer's offered content hashes, which this instance lacks — a pure content-addressed set-difference (no cursor)." - fn = - (function - | _, _, _, [ DList(_, hashDvals) ] -> - uply { - let hashes = - hashDvals - |> List.choose (fun d -> - match d with - | DString s -> Some s - | _ -> None) - let! missing = LibDB.RuntimeTypes.Blob.missing hashes - return Dval.list KTString (missing |> List.map DString) - } - | _ -> incorrectArgs ()) - sqlSpec = NotQueryable - previewable = Impure - capabilities = LibExecution.Capabilities.noCaps - deprecated = NotDeprecated } - - // Receiver: store a fetched blob — base64-decode + insert under its content hash. Idempotent (dedup). - { name = fn "syncBlobInsert" 0 - typeParams = [] - parameters = - [ Param.make "hash" TString "The content hash" - Param.make - "base64Bytes" - TString - "The blob's bytes, base64-encoded (empty = skip)" ] - returnType = TBool - description = - "Store a fetched blob: base64-decode + insert under its content hash. Idempotent. Returns true if non-empty bytes were inserted, false if the peer's body was empty." - fn = - (function - | _, _, _, [ DString hash; DString b64 ] -> - uply { - if b64 = "" then - return DBool false - else - // Total against a hostile/garbled peer body (bad base64 must not throw), and — the integrity - // core of a content-addressed store — only store bytes that ACTUALLY hash to the claimed hash. - // Without this a peer could serve arbitrary bytes for a legitimate hash and poison the store - // (a value silently becomes different code) for every branch that references it. - match - (try - Some(System.Convert.FromBase64String b64) - with _ -> - None) - with - | None -> return DBool false - | Some bytes -> - if LibExecution.Blob.sha256Hex bytes = hash then - do! LibDB.RuntimeTypes.Blob.insert hash bytes - return DBool true - else - return DBool false - } - | _ -> incorrectArgs ()) - sqlSpec = NotQueryable - previewable = Impure - capabilities = LibExecution.Capabilities.noCaps - deprecated = NotDeprecated } ] + ] let builtins () = LibExecution.Builtin.make [] (fns ()) diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Sync.fs b/backend/src/Builtins/Builtins.Matter/Libs/Sync.fs new file mode 100644 index 0000000000..bb239e6d1b --- /dev/null +++ b/backend/src/Builtins/Builtins.Matter/Libs/Sync.fs @@ -0,0 +1,599 @@ +/// Native builtins for the sync surface: the op-log read/append wire (package_ops/branch_ops/resolutions), +/// the content-addressed blob channel, and the instance's store path + Release coordinate. Internal machinery +/// the CLI/sync engine calls (wrapped under `Darklang.Sync.*`) — NOT stdlib. Generic SQLite access lives in +/// `Libs/Sqlite.fs`; these ride on the op log via `LibDB`, not raw SQL. +module Builtins.Matter.Libs.Sync + +open FSharp.Control.Tasks + +open Prelude +open LibExecution.RuntimeTypes +open LibExecution.Builtin.Shortcuts + +module Dval = LibExecution.Dval +module PackageRefs = LibExecution.PackageRefs +module NR = LibExecution.RuntimeTypes.NameResolution +module Blob = LibExecution.Blob + +module EventLogRefs = LibExecution.PackageRefs.Type.Stdlib.EventLog +let private eventLogEventType () = FQTypeName.fqPackage (EventLogRefs.event ()) +let private eventLogCommitType () = FQTypeName.fqPackage (EventLogRefs.commit ()) +let private eventLogCursorType () = FQTypeName.fqPackage (EventLogRefs.cursor ()) + +/// Build the `Stdlib.EventLog.Event` record for one op row — natively, so a 1000-op batch never pays the +/// per-row Dark interpreter cost the native read exists to avoid. +let private eventRecord + ((id, op, br, ch, ts) : string * string * string * string * string) + : Dval = + let t = eventLogEventType () + DRecord( + t, + t, + [], + Map + [ "id", DString id + "op", DString op + "branchId", DString br + "commitHash", DString ch + "originTs", DString ts ] + ) + +let private commitRecord + ((hash, msg, br, acct, at) : string * string * string * string * string) + : Dval = + let t = eventLogCommitType () + DRecord( + t, + t, + [], + Map + [ "hash", DString hash + "message", DString msg + "branchId", DString br + "accountId", DString acct + "createdAt", DString at ] + ) + +let private cursorValue (n : int64) : Dval = + let t = eventLogCursorType () + DEnum(t, t, [], "Cursor", [ DInt64 n ]) + +let private branchOpEventType () = + FQTypeName.fqPackage (EventLogRefs.branchOpEvent ()) + +/// Build the `Stdlib.EventLog.BranchOpEvent` record for one branch_ops row — natively (no per-row Dark cost). +let private branchOpEventRecord + ((id, op, originTs) : string * string * string) + : Dval = + let t = branchOpEventType () + DRecord( + t, + t, + [], + Map [ "id", DString id; "op", DString op; "originTs", DString originTs ] + ) + +let private resolutionEventType () = + FQTypeName.fqPackage (EventLogRefs.resolutionEvent ()) + +/// Build the `Stdlib.EventLog.ResolutionEvent` record for one resolutions row. +let private resolutionEventRecord + ((id, branchId, location, itemKind, chosenHash, resolvedBy, at) : + string * string * string * string * string * string * string) + : Dval = + let t = resolutionEventType () + + DRecord( + t, + t, + [], + Map + [ "id", DString id + "branchId", DString branchId + "location", DString location + "itemKind", DString itemKind + "chosenHash", DString chosenHash + "resolvedBy", DString resolvedBy + "at", DString at ] + ) + +/// Read a string field out of an EventLog Event/Commit record (built by the peer + parsed from JSON) — +/// natively, so appending a 1000-op batch never pays the per-row Dark interpreter cost. +let private recField (name : string) (fields : Map) : string = + match Map.tryFind name fields with + | Some(DString s) -> s + | _ -> + Exception.raiseInternal + "eventLog record missing expected string field" + [ "field", name ] + +/// A peer sent a `kind` row (op / commit / resolution) we can't parse. Peers are fully trusted for now, so +/// the append skips it rather than crash the pull — but that must be VISIBLE, not silent: a skipped row is +/// dropped while the pull cursor still advances past it, so on divergence the operator needs to see it. +/// (The proper hardening — quarantine + retry per-op instead of skip — is tracked in CLEANUP(sync-security).) +let private warnSkippedSyncRow (kind : string) : unit = + System.Console.Error.WriteLine( + $"sync: skipped an unparseable {kind} from a peer (dropped, not applied). This can diverge the store; " + + "re-pull once the peer is fixed." + ) + +let fns () : List = + [ + // This instance's OWN package store path (data.db). The op-log builtins write ops here; the sync config + // tables (sync_peers/sync_cursors) live here too — the daemon/CLI don't have to know the path. + { name = fn "localDbPath" 0 + typeParams = [] + parameters = [ Param.make "unit" TUnit "" ] + returnType = TString + description = "The file path of this instance's own package store (data.db)." + fn = + (function + | _, _, _, [ DUnit ] -> uply { return DString LibConfig.Config.dbPath } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // The Release (store format/version coordinate: language + op-format + schema + hashing) this Dark + // binary speaks. Compared against the store's stamped Release for the upgrade/`dark version` surface. + { name = fn "currentRelease" 0 + typeParams = [] + parameters = [ Param.make "unit" TUnit "" ] + returnType = TInt + description = "The Release (store format/version) this Dark binary speaks." + fn = + (function + | _, _, _, [ DUnit ] -> + uply { return Dval.int (bigint LibDB.Releases.currentRelease) } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // ── native op-log read/append + blob-channel builtins (the ops-queue seam sync rides on) ── + // CLEANUP(sync-builtins): these operate on the FIXED local store (not an arbitrary path) and still declare + // noCaps, so untrusted `dark run` can read/append the op log. Lower-risk than the arbitrary-path sqlite* above + // (can't touch other files), but when these are reorganized around a first-class ops-queue they should carry + // a real store capability too. + // + // The TYPED, stream-shaped read of the package op log: Event/Commit records + the resume Cursor, all built + // NATIVELY so a 1000-op batch never pays the per-row Dark interpreter cost. `EventLog.readSince` wraps this; + // the events Stream is drained (native loop) for the wire, and is filterable for branch-scoped reads. + { name = fn "packageOpsReadNative" 0 + typeParams = [ "c"; "e"; "cur" ] + parameters = + [ Param.make + "cursor" + TInt64 + "read events after this cursor (0 = from the start)" + Param.make "limit" TInt64 "at most this many events — one bounded batch" ] + returnType = + TTuple(TList(TVariable "c"), TStream(TVariable "e"), [ TVariable "cur" ]) + description = + "This instance's committed events after (at most ) as a Stream of Event records, the Commit records they reference, and the resume Cursor. Built natively — the fast typed read half of the op-log seam." + fn = + (function + | _, _, _, [ DInt64 cursor; DInt64 limit ] -> + uply { + let! (commits, events, newCursor) = LibDB.Seed.eventsSince cursor limit + + let commitsList = + List.map commitRecord commits + |> Dval.list (KTCustomType(eventLogCommitType (), [])) + + let remaining = ref (List.map eventRecord events) + + let nextFn () : Ply> = + uply { + match remaining.Value with + | head :: tail -> + remaining.Value <- tail + return Some head + | [] -> return None + } + + let eventStream = + LibExecution.Stream.newFromIO + (ValueType.Known(KTCustomType(eventLogEventType (), []))) + nextFn + None + + return DTuple(commitsList, eventStream, [ cursorValue newCursor ]) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // The TYPED append: Commit + Event records received from a peer (parsed from JSON natively) folded into the + // package op log. Field extraction is native — a 1000-op pull never pays the per-row Dark cost. Returns the + // count newly applied (idempotent). `EventLog.append` wraps this. + { name = fn "packageOpsAppendNative" 0 + typeParams = [ "c"; "e" ] + parameters = + [ Param.make + "commits" + (TList(TVariable "c")) + "Commit records the events reference" + Param.make + "events" + (TList(TVariable "e")) + "Event records received from a peer" ] + returnType = TInt + description = + "Append received Commit + Event records to the op log (reconciling origin_ts to the MIN stamp for LWW convergence) + fold. Returns the count of ops newly applied. Idempotent. Extracts fields natively." + fn = + (function + | _, _, _, [ DList(_, commits); DList(_, events) ] -> + uply { + // Receive must be TOTAL against a malformed/hostile peer: skip any event/commit that won't parse + // (bad guid/hex), and catch a batch-level DB error (e.g. an FK to a row not in this batch) so the + // pull loop + background daemon survive instead of crashing. CLEANUP(sync-security): peers are + // FULLY TRUSTED for now — a future hardening should verify op ids against content + reject bad ops + // per-op (not skip the whole batch) + not trust the peer's account_id/commit_hash. + let parsedCommits = + commits + |> List.choose (fun c -> + match c with + | DRecord(_, _, _, f) -> + try + Some( + recField "hash" f, + recField "message" f, + System.Guid.Parse(recField "branchId" f), + System.Guid.Parse(recField "accountId" f), + recField "createdAt" f + ) + with _ -> + warnSkippedSyncRow "commit" + None + | _ -> + warnSkippedSyncRow "commit" + None) + + let parsedEvents = + events + |> List.choose (fun ev -> + match ev with + | DRecord(_, _, _, f) -> + try + Some( + System.Guid.Parse(recField "id" f), + System.Convert.FromHexString(recField "op" f), + System.Guid.Parse(recField "branchId" f), + recField "commitHash" f, + recField "originTs" f + ) + with _ -> + warnSkippedSyncRow "package op" + None + | _ -> + warnSkippedSyncRow "package op" + None) + + try + let! applied = LibDB.Seed.receiveOps parsedCommits parsedEvents + return Dval.int (bigint applied) + with _ -> + // -1 = a DB error applying the batch (distinct from 0 = idempotent/nothing new). The puller + // must NOT advance the cursor on this, or the ops are silently skipped (divergence). Any + // individually unparseable ops were skipped above and surfaced via warnSkippedSyncRow — they are + // dropped (not applied) while the cursor still advances, so they're logged, not silently lost. + return Dval.int (bigint -1L) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // The branch-structure log (CreateBranch/CreateCommit/Rebase/Merge/Archive), read as a Stream of + // BranchOpEvent records + the resume Cursor. Branch ops are self-contained (no side commits). Peers apply + // these to LEARN branches — the structure that `packageOps` events reference by branch_id. + { name = fn "branchOpsReadNative" 0 + typeParams = [ "e"; "cur" ] + parameters = + [ Param.make + "cursor" + TInt64 + "read branch ops after this cursor (0 = from the start)" + Param.make "limit" TInt64 "at most this many — one bounded batch" ] + returnType = TTuple(TStream(TVariable "e"), TVariable "cur", []) + description = + "This instance's branch ops after as a Stream of BranchOpEvent records + the resume Cursor. Built natively." + fn = + (function + | _, _, _, [ DInt64 cursor; DInt64 limit ] -> + uply { + let! (events, newCursor) = LibDB.Seed.branchOpsSince cursor limit + + let remaining = ref (List.map branchOpEventRecord events) + + let nextFn () : Ply> = + uply { + match remaining.Value with + | head :: tail -> + remaining.Value <- tail + return Some head + | [] -> return None + } + + let stream = + LibExecution.Stream.newFromIO + (ValueType.Known(KTCustomType(branchOpEventType (), []))) + nextFn + None + + return DTuple(stream, cursorValue newCursor, []) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // Apply branch ops RECEIVED from a peer (BranchOpEvent records) — fold into branches/commits. Idempotent. + { name = fn "branchOpsAppendNative" 0 + typeParams = [ "e" ] + parameters = + [ Param.make + "events" + (TList(TVariable "e")) + "BranchOpEvent records received from a peer" ] + returnType = TInt + description = + "Apply received BranchOpEvent records to the branch-ops log (fold into branches/commits). Returns the count processed. Idempotent." + fn = + (function + | _, _, _, [ DList(_, events) ] -> + uply { + // Total against a bad peer (see packageOpsAppendNative): skip unparseable events, catch batch errors. + let parsed = + events + |> List.choose (fun ev -> + match ev with + | DRecord(_, _, _, f) -> + try + Some( + recField "id" f, + System.Convert.FromHexString(recField "op" f), + recField "originTs" f + ) + with _ -> + warnSkippedSyncRow "branch op" + None + | _ -> + warnSkippedSyncRow "branch op" + None) + + try + let! applied = LibDB.Seed.receiveBranchOps parsed + return Dval.int (bigint applied) + with _ -> + // -1 = DB error (vs 0 = idempotent) so the puller stops without advancing this log's cursor. + return Dval.int (bigint -1L) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // The resolutions log — synced override overlays. Peers apply these AFTER package ops so a human's + // "keep mine" decision converges everywhere. Read as a Stream of ResolutionEvent records + the cursor. + { name = fn "resolutionsReadNative" 0 + typeParams = [ "e"; "cur" ] + parameters = + [ Param.make + "cursor" + TInt64 + "read resolutions after this cursor (0 = from the start)" + Param.make "limit" TInt64 "at most this many — one bounded batch" ] + returnType = TTuple(TStream(TVariable "e"), TVariable "cur", []) + description = + "This instance's resolutions after as a Stream of ResolutionEvent records + the resume Cursor. Built natively." + fn = + (function + | _, _, _, [ DInt64 cursor; DInt64 limit ] -> + uply { + let! (events, newCursor) = + LibDB.Resolutions.resolutionsSince cursor limit + + let remaining = ref (List.map resolutionEventRecord events) + + let nextFn () : Ply> = + uply { + match remaining.Value with + | head :: tail -> + remaining.Value <- tail + return Some head + | [] -> return None + } + + let stream = + LibExecution.Stream.newFromIO + (ValueType.Known(KTCustomType(resolutionEventType (), []))) + nextFn + None + + return DTuple(stream, cursorValue newCursor, []) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // Apply resolutions RECEIVED from a peer (ResolutionEvent records) — record + overlay onto locations. + // Idempotent (id-keyed) + LWW-gated by each resolution's `at`. + { name = fn "resolutionsAppendNative" 0 + typeParams = [ "e" ] + parameters = + [ Param.make + "events" + (TList(TVariable "e")) + "ResolutionEvent records received from a peer" ] + returnType = TInt + description = + "Apply received ResolutionEvent records (record + overlay onto locations). Returns the count processed. Idempotent." + fn = + (function + | _, _, _, [ DList(_, events) ] -> + uply { + let parsed = + events + |> List.choose (fun ev -> + match ev with + | DRecord(_, _, _, f) -> + try + Some( + recField "id" f, + recField "branchId" f, + recField "location" f, + recField "itemKind" f, + recField "chosenHash" f, + recField "resolvedBy" f, + recField "at" f + ) + with _ -> + warnSkippedSyncRow "resolution" + None + | _ -> + warnSkippedSyncRow "resolution" + None) + + try + let! applied = LibDB.Resolutions.receiveResolutions parsed + return Dval.int (bigint applied) + with _ -> + // -1 = DB error (vs 0 = idempotent) so the puller stops without advancing this log's cursor. + return Dval.int (bigint -1L) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + + // ── HTTP blob channel — package_blobs (a value's large content) don't ride the op stream, so after + // applying a peer's ops the puller fetches the blobs it now lacks. Content-addressed = idempotent. + + // Sender: the blob MANIFEST — every content hash this instance holds, newline-joined (GET /sync/blobs). + { name = fn "syncBlobManifest" 0 + typeParams = [] + parameters = [ Param.make "unit" TUnit "" ] + returnType = TString + description = + "The blob manifest (the GET /sync/blobs body): every content hash this instance holds, newline-joined." + fn = + (function + | _, _, _, [ DUnit ] -> + uply { + let! hashes = LibDB.RuntimeTypes.Blob.allHashes () + return DString(String.concat "\n" hashes) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // Sender: the bytes for one hash, base64 (GET /sync/blob?hash=), or empty if this instance lacks it. + { name = fn "syncBlobBytes" 0 + typeParams = [] + parameters = [ Param.make "hash" TString "The content hash to fetch" ] + returnType = TString + description = + "The bytes for one content hash, base64-encoded (the GET /sync/blob?hash= body), or empty if this instance lacks it." + fn = + (function + | _, _, _, [ DString hash ] -> + uply { + match! LibDB.RuntimeTypes.Blob.get hash with + | Some bytes -> return DString(System.Convert.ToBase64String bytes) + | None -> return DString "" + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // Receiver: of a peer's offered hashes, which this instance LACKS — exactly the blobs to fetch. + { name = fn "syncBlobMissing" 0 + typeParams = [] + parameters = + [ Param.make + "hashes" + (TList TString) + "A peer's offered content hashes (its manifest)" ] + returnType = TList TString + description = + "Of the peer's offered content hashes, which this instance lacks — a pure content-addressed set-difference (no cursor)." + fn = + (function + | _, _, _, [ DList(_, hashDvals) ] -> + uply { + let hashes = + hashDvals + |> List.choose (fun d -> + match d with + | DString s -> Some s + | _ -> None) + let! missing = LibDB.RuntimeTypes.Blob.missing hashes + return Dval.list KTString (missing |> List.map DString) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // Receiver: store a fetched blob — base64-decode + insert under its content hash. Idempotent (dedup). + { name = fn "syncBlobInsert" 0 + typeParams = [] + parameters = + [ Param.make "hash" TString "The content hash" + Param.make + "base64Bytes" + TString + "The blob's bytes, base64-encoded (empty = skip)" ] + returnType = TBool + description = + "Store a fetched blob: base64-decode + insert under its content hash. Idempotent. Returns true if non-empty bytes were inserted, false if the peer's body was empty." + fn = + (function + | _, _, _, [ DString hash; DString b64 ] -> + uply { + if b64 = "" then + return DBool false + else + // Total against a hostile/garbled peer body (bad base64 must not throw), and — the integrity + // core of a content-addressed store — only store bytes that ACTUALLY hash to the claimed hash. + // Without this a peer could serve arbitrary bytes for a legitimate hash and poison the store + // (a value silently becomes different code) for every branch that references it. + match + (try + Some(System.Convert.FromBase64String b64) + with _ -> + None) + with + | None -> return DBool false + | Some bytes -> + if LibExecution.Blob.sha256Hex bytes = hash then + do! LibDB.RuntimeTypes.Blob.insert hash bytes + return DBool true + else + return DBool false + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } ] + +let builtins () = LibExecution.Builtin.make [] (fns ()) From 76781077bc97a9d62968a9ba68781c17df69c1b5 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 22:51:48 -0400 Subject: [PATCH 035/172] cli: clarify the stdin non-TTY guard comment MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Reviewed the guard that returns Escape from readKeyOrPaste when stdin is redirected. It's correct and stays: stdinReadKey is used only by the interactive TUI key loop, and without a terminal Console.ReadKey/KeyAvailable throw InvalidOperation_ConsoleReadKeyOnFile — the guard turns that crash into a clean "quit". Rewrite the comment to spell out, for a human, the exact scenario, the crash it prevents, and that a view could alternatively bail up front via the stdinIsInteractive builtin (this guard is the last resort at the throwing primitive). No behavior change. Co-Authored-By: Claude Opus 4.8 --- backend/src/Builtins/Builtins.Cli/Libs/Stdin.fs | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/backend/src/Builtins/Builtins.Cli/Libs/Stdin.fs b/backend/src/Builtins/Builtins.Cli/Libs/Stdin.fs index d1c8df2906..cf310d2aa6 100644 --- a/backend/src/Builtins/Builtins.Cli/Libs/Stdin.fs +++ b/backend/src/Builtins/Builtins.Cli/Libs/Stdin.fs @@ -35,12 +35,14 @@ let private readKeyOrPaste () : ConsoleKeyInfo * string option = let isPrintable (k : ConsoleKeyInfo) = k.KeyChar <> '\u0000' && not (Char.IsControl k.KeyChar) - // No interactive console (stdin redirected / not a TTY — e.g. an interactive - // view launched from a script, a pipe, or a daemon). `Console.ReadKey` and - // `Console.KeyAvailable` both throw InvalidOperation_ConsoleReadKeyOnFile here, - // which would crash a TUI's key loop with a raw stack dump. Report Escape - // instead — every full-screen view treats it as "exit" — so the view closes - // cleanly rather than blowing up. + // Safety net for launching an interactive view without a terminal: when stdin is redirected — a pipe, a + // file, `< /dev/null`, a script, or a daemon — it's not a TTY. The full-screen views drive this in a tight + // key loop, and with no terminal `Console.ReadKey`/`Console.KeyAvailable` throw + // InvalidOperation_ConsoleReadKeyOnFile the moment the loop waits for a keypress — which would crash the + // view with a raw .NET stack trace (e.g. `dark < /dev/null`). We report Escape, which every + // full-screen view treats as "quit", so the view exits cleanly instead. A view could also bail up front via + // the `stdinIsInteractive` builtin; this guard is the last resort at the primitive that actually throws, so + // no key loop can blow up even if it forgets to check. if Console.IsInputRedirected then (ConsoleKeyInfo('\u001b', ConsoleKey.Escape, false, false, false), None) else From 11df1aa91fdebdca2001ed95e25edc9122021fe5 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 23:00:15 -0400 Subject: [PATCH 036/172] sync: route localDbPath/currentRelease through Darklang.Sync wrappers (drop from allowlist) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit localDbPath (5 callers) and currentRelease (4 callers) were referenced directly as Builtin.X from several packages, so they sat in the multiUseAllowlist. Add one Darklang.Sync wrapper each (the sole builtin caller) and route every caller through it — config/ops/version/server + sync itself — so each builtin has a single package reference and both come off the allowlist (shrinking it, per its stated goal). No behavior change; suite green (9,958). Co-Authored-By: Claude Opus 4.8 --- backend/tests/Tests/Builtin.Tests.fs | 6 ------ packages/darklang/cli/config.dark | 2 +- .../darklang/cli/installation/version.dark | 4 ++-- packages/darklang/cli/ops.dark | 2 +- packages/darklang/sync.dark | 18 ++++++++++++++---- packages/darklang/sync/server.dark | 2 +- 6 files changed, 19 insertions(+), 15 deletions(-) diff --git a/backend/tests/Tests/Builtin.Tests.fs b/backend/tests/Tests/Builtin.Tests.fs index c6b82d8c31..85a24c444a 100644 --- a/backend/tests/Tests/Builtin.Tests.fs +++ b/backend/tests/Tests/Builtin.Tests.fs @@ -169,12 +169,6 @@ let private multiUseAllowlist : Set = // LSP, and CLI-script parsing. "parserParseToWrittenTypes" - // Sync / event-log seam — infra builtins used across the sync surface. - // localDbPath: the local store path (EventLog.readSince, sync.dark, server.dark, version.dark). - // currentRelease: the Release coordinate (version display + sync's version-skew handshake). - "currentRelease" - "localDbPath" - // Misc. "interpreterStatsReset" ] diff --git a/packages/darklang/cli/config.dark b/packages/darklang/cli/config.dark index 547f0ca0a8..63168de8ae 100644 --- a/packages/darklang/cli/config.dark +++ b/packages/darklang/cli/config.dark @@ -5,7 +5,7 @@ module Darklang.Cli.Config // "rundir/cli-config.json", was CWD-relative: `login` silently no-op'd — printed "Logged in" but persisted // nothing — whenever the CLI ran from a directory without a `rundir/` subdir, e.g. a released exe run from $HOME.) let configFilePath () : String = - let dbPath = Builtin.localDbPath () + let dbPath = Darklang.Sync.localDbPath () let dir = Stdlib.String.join (Stdlib.List.dropLast (Stdlib.String.split dbPath "/")) "/" $"{dir}/cli-config.json" diff --git a/packages/darklang/cli/installation/version.dark b/packages/darklang/cli/installation/version.dark index 293b659a91..80ee437861 100644 --- a/packages/darklang/cli/installation/version.dark +++ b/packages/darklang/cli/installation/version.dark @@ -7,12 +7,12 @@ let execute (state: AppState) (args: List) : AppState = // Release coordinate — the store format/version this Dark speaks vs what your local data is stamped at. // (This is what the boot-time migrator + sync's wire-version key off; see `dark update`.) - let exeRel = Stdlib.Int.toString (Builtin.currentRelease ()) + let exeRel = Stdlib.Int.toString (Darklang.Sync.currentRelease ()) let storeRel = match Stdlib.Sqlite.query - (Builtin.localDbPath ()) + (Darklang.Sync.localDbPath ()) "SELECT release FROM release_state_v0 WHERE id = 0" with | Ok [ row ] -> diff --git a/packages/darklang/cli/ops.dark b/packages/darklang/cli/ops.dark index 67b8c1939a..e33dacb7d6 100644 --- a/packages/darklang/cli/ops.dark +++ b/packages/darklang/cli/ops.dark @@ -5,7 +5,7 @@ module Darklang.Cli.Ops // interface (the same one a peer's wire read uses, and the same one an eventual Dark-managed fold would use), // so it doubles as a live proof that Dark can read the log at speed. Read-only. -let private db () : String = Builtin.localDbPath () +let private db () : String = Darklang.Sync.localDbPath () /// First 8 chars of a hash/uuid for compact display. let private short (s: String) : String = diff --git a/packages/darklang/sync.dark b/packages/darklang/sync.dark index 462d58f205..426b19d902 100644 --- a/packages/darklang/sync.dark +++ b/packages/darklang/sync.dark @@ -49,7 +49,7 @@ let wireSince // per-branch scoping properly. // CLEANUP(per-branch-sync): reintroduce scoped controls when done right. Stdlib.Json.serialize ( Wire - { release = Builtin.currentRelease() + { release = currentRelease() branchEvents = Stdlib.Stream.toList branchBatch.events branchCursor = branchBatch.next commits = pkgBatch.commits @@ -62,8 +62,18 @@ let wireSince // ── peer config + per-peer resume cursors (LOCAL, per-instance; never synced, like `caps`) ── +/// This instance's local store path (its default SQLite db). The single package caller of the localDbPath +/// builtin — everything else goes through here — so the builtin keeps one reference. +let localDbPath () : String = + Builtin.localDbPath () + +/// This binary's Release coordinate (the version integer sync's wire handshake compares; see LibDB.Releases). +/// The single package caller of the currentRelease builtin. +let currentRelease () : Int = + Builtin.currentRelease () + let private syncDb () : String = - let db = Builtin.localDbPath () + let db = localDbPath () let _ = Stdlib.Sqlite.exec db "CREATE TABLE IF NOT EXISTS sync_peers_v0 (url TEXT PRIMARY KEY)" @@ -181,9 +191,9 @@ let rec pullLoop | Ok wire -> match Stdlib.Json.parse wire with | Ok(w) -> - if w.release != Builtin.currentRelease() then + if w.release != currentRelease() then Stdlib.Result.Result.Error - $"{peer} is on Dark release {Stdlib.Int.toString w.release}; you're on {Stdlib.Int.toString (Builtin.currentRelease())} — upgrade to the same release to sync" + $"{peer} is on Dark release {Stdlib.Int.toString w.release}; you're on {Stdlib.Int.toString (currentRelease())} — upgrade to the same release to sync" else // Apply branch STRUCTURE before content, so package ops' branch_ids resolve on this side. Each append // returns the count applied, or -1 on a DB error (distinct from 0 = idempotent/nothing new). We diff --git a/packages/darklang/sync/server.dark b/packages/darklang/sync/server.dark index 4c7869c88b..36724502af 100644 --- a/packages/darklang/sync/server.dark +++ b/packages/darklang/sync/server.dark @@ -17,7 +17,7 @@ module Darklang.Sync.Server // GET /sync/health — liveness + servable op count. Counts COMMITTED ops only — the ones a peer can actually // pull (WIP stays local) — so two instances comparing counts to gauge convergence are comparing like for like. let healthFn (req: Stdlib.Http.Request) : Stdlib.Http.Response = - let db = Builtin.localDbPath () + let db = Darklang.Sync.localDbPath () let n = (Stdlib.Sqlite.scalarInt From e19b4e093ecafddd2605422a75519108b682340d Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 23:13:24 -0400 Subject: [PATCH 037/172] =?UTF-8?q?sync:=20rehome=20the=20op-log=20wrapper?= =?UTF-8?q?=20Stdlib.EventLog=20=E2=86=92=20Darklang.Sync.EventLog?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The op-log read/append seam is internal sync machinery, not something a user's Darklang program reaches for — so it doesn't belong under Stdlib. Move the module (types Cursor/Event/Commit/BranchOpEvent/ResolutionEvent + read*/append* fns) to Darklang.Sync.EventLog: rename the .dark module + move the file under sync/, add a Type.Sync.EventLog group in PackageRefs (so the natives resolve the new FQNs), repoint Libs/Sync.fs's EventLogRefs, and update all references (sync.dark, server.dark, the sync-unit testfile). package-ref-hashes.txt regenerates via reload-packages (gitignored). Suite green (9,958). With this, only generic SQLite lives under Stdlib.Sqlite; every sync-specific builtin + wrapper is under Libs/Sync.fs (F#) and Darklang.Sync.* (Dark). Co-Authored-By: Claude Opus 4.8 --- .../src/Builtins/Builtins.Matter/Libs/Sync.fs | 8 ++-- backend/src/LibExecution/PackageRefs.fs | 20 ++++---- .../testfiles/execution/cli/sync-unit.dark | 4 +- packages/darklang/sync.dark | 46 +++++++++---------- .../darklang/{stdlib => sync}/eventLog.dark | 0 packages/darklang/sync/server.dark | 2 +- 6 files changed, 42 insertions(+), 38 deletions(-) rename packages/darklang/{stdlib => sync}/eventLog.dark (100%) diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Sync.fs b/backend/src/Builtins/Builtins.Matter/Libs/Sync.fs index bb239e6d1b..5ac22fa6d9 100644 --- a/backend/src/Builtins/Builtins.Matter/Libs/Sync.fs +++ b/backend/src/Builtins/Builtins.Matter/Libs/Sync.fs @@ -15,12 +15,12 @@ module PackageRefs = LibExecution.PackageRefs module NR = LibExecution.RuntimeTypes.NameResolution module Blob = LibExecution.Blob -module EventLogRefs = LibExecution.PackageRefs.Type.Stdlib.EventLog +module EventLogRefs = LibExecution.PackageRefs.Type.Sync.EventLog let private eventLogEventType () = FQTypeName.fqPackage (EventLogRefs.event ()) let private eventLogCommitType () = FQTypeName.fqPackage (EventLogRefs.commit ()) let private eventLogCursorType () = FQTypeName.fqPackage (EventLogRefs.cursor ()) -/// Build the `Stdlib.EventLog.Event` record for one op row — natively, so a 1000-op batch never pays the +/// Build the `Darklang.Sync.EventLog.Event` record for one op row — natively, so a 1000-op batch never pays the /// per-row Dark interpreter cost the native read exists to avoid. let private eventRecord ((id, op, br, ch, ts) : string * string * string * string * string) @@ -61,7 +61,7 @@ let private cursorValue (n : int64) : Dval = let private branchOpEventType () = FQTypeName.fqPackage (EventLogRefs.branchOpEvent ()) -/// Build the `Stdlib.EventLog.BranchOpEvent` record for one branch_ops row — natively (no per-row Dark cost). +/// Build the `Darklang.Sync.EventLog.BranchOpEvent` record for one branch_ops row — natively (no per-row Dark cost). let private branchOpEventRecord ((id, op, originTs) : string * string * string) : Dval = @@ -76,7 +76,7 @@ let private branchOpEventRecord let private resolutionEventType () = FQTypeName.fqPackage (EventLogRefs.resolutionEvent ()) -/// Build the `Stdlib.EventLog.ResolutionEvent` record for one resolutions row. +/// Build the `Darklang.Sync.EventLog.ResolutionEvent` record for one resolutions row. let private resolutionEventRecord ((id, branchId, location, itemKind, chosenHash, resolvedBy, at) : string * string * string * string * string * string * string) diff --git a/backend/src/LibExecution/PackageRefs.fs b/backend/src/LibExecution/PackageRefs.fs index b047f8ba3e..ee0d9a437f 100644 --- a/backend/src/LibExecution/PackageRefs.fs +++ b/backend/src/LibExecution/PackageRefs.fs @@ -95,6 +95,18 @@ module Type = else Exception.raiseInternal "PackageRefs: type hash not found" [ "fqn", fqn ] + // Darklang.Sync.* — internal sync machinery (op-log wire types) + module Sync = + let private p addl = p ("Sync" :: addl) + + module EventLog = + let private p addl = p ("EventLog" :: addl) + let cursor = p [] "Cursor" + let event = p [] "Event" + let commit = p [] "Commit" + let branchOpEvent = p [] "BranchOpEvent" + let resolutionEvent = p [] "ResolutionEvent" + module Stdlib = let private p addl = p ("Stdlib" :: addl) @@ -142,14 +154,6 @@ module Type = let parseError = p [ "ParseError" ] "ParseError" let json = p [] "Json" - module EventLog = - let private p addl = p ("EventLog" :: addl) - let cursor = p [] "Cursor" - let event = p [] "Event" - let commit = p [] "Commit" - let branchOpEvent = p [] "BranchOpEvent" - let resolutionEvent = p [] "ResolutionEvent" - module Cli = let private p addl = p ("Cli" :: addl) let executionOutcome = p [] "ExecutionOutcome" diff --git a/backend/testfiles/execution/cli/sync-unit.dark b/backend/testfiles/execution/cli/sync-unit.dark index db491c49a0..3f0d43864f 100644 --- a/backend/testfiles/execution/cli/sync-unit.dark +++ b/backend/testfiles/execution/cli/sync-unit.dark @@ -6,9 +6,9 @@ // The append path parses each event and drops any it can't (bad hex op / bad uuid) — "a bad peer skips, not // crashes". A batch of only-garbage folds nothing and returns 0, totally, rather than throwing. module AppendSkipsMalformedOp = - (Stdlib.EventLog.append + (Darklang.Sync.EventLog.append [] - [ Stdlib.EventLog.Event + [ Darklang.Sync.EventLog.Event { id = "00000000-0000-0000-0000-000000000001" op = "zznothexatall" branchId = "89282547-e4e6-4986-bcb6-db74bc6a8c0f" diff --git a/packages/darklang/sync.dark b/packages/darklang/sync.dark index 426b19d902..8b9db13de8 100644 --- a/packages/darklang/sync.dark +++ b/packages/darklang/sync.dark @@ -3,20 +3,20 @@ module Darklang.Sync // Sync = replicate the op log over HTTP. A peer SERVES its committed events since a cursor (`wireSince`, the // `GET /sync/events?since=` body); a puller GETs them and appends them (folding happens invisibly). Everything // that crosses the wire is OPS — never a database file, never ATTACH. Sync owns no event mechanics: it's thin -// policy (transport + per-peer cursors) on the general event-log seam, `Stdlib.EventLog`. +// policy (transport + per-peer cursors) on the general event-log seam, `Darklang.Sync.EventLog`. /// The wire (JSON): the version handshake + one bounded batch from EACH synced log. `release` lets a puller /// refuse a peer on a different Dark release. `branchOps` (structure) is applied before `packageOps` (content) /// so package ops' branch_ids resolve on the receiver. Each log carries its own resume cursor. type Wire = { release: Int - branchEvents: List - branchCursor: Stdlib.EventLog.Cursor - commits: List - packageEvents: List - packageCursor: Stdlib.EventLog.Cursor - resolutionEvents: List - resolutionCursor: Stdlib.EventLog.Cursor } + branchEvents: List + branchCursor: Darklang.Sync.EventLog.Cursor + commits: List + packageEvents: List + packageCursor: Darklang.Sync.EventLog.Cursor + resolutionEvents: List + resolutionCursor: Darklang.Sync.EventLog.Cursor } /// The `GET /sync/events?package=&branch=&resolution=` body: this instance's Release + one bounded /// batch from each log after the given cursors, as JSON. Served by `Sync.Server`, pulled by `Sync.pull`. @@ -29,18 +29,18 @@ let wireSince // cursors until all come back empty. 1000 ops (~1 MB) balances round-trips against response size; the // native reads make even a whole log milliseconds, so the batch is for bounded responses + resumability. let branchBatch = - Stdlib.EventLog.readBranchOps - (Stdlib.EventLog.cursorFromInt branchCursor) + Darklang.Sync.EventLog.readBranchOps + (Darklang.Sync.EventLog.cursorFromInt branchCursor) 1000L let pkgBatch = - Stdlib.EventLog.readSince - (Stdlib.EventLog.cursorFromInt packageCursor) + Darklang.Sync.EventLog.readSince + (Darklang.Sync.EventLog.cursorFromInt packageCursor) 1000L let resolutionBatch = - Stdlib.EventLog.readResolutions - (Stdlib.EventLog.cursorFromInt resolutionCursor) + Darklang.Sync.EventLog.readResolutions + (Darklang.Sync.EventLog.cursorFromInt resolutionCursor) 1000L // Wholesale sync: every committed branch/package/resolution op in the batch crosses the wire, so a branch is @@ -204,13 +204,13 @@ let rec pullLoop if Stdlib.List.length w.branchEvents == 0 then 0 else - Stdlib.EventLog.appendBranchOps w.branchEvents + Darklang.Sync.EventLog.appendBranchOps w.branchEvents let packageApplied = if Stdlib.List.length w.packageEvents == 0 then 0 else - Stdlib.EventLog.append w.commits w.packageEvents + Darklang.Sync.EventLog.append w.commits w.packageEvents // Resolutions LAST — they overlay the folded bindings, so a peer's "keep mine" override wins and // converges. Each is idempotent + LWW-gated by its own `at`. @@ -218,7 +218,7 @@ let rec pullLoop if Stdlib.List.length w.resolutionEvents == 0 then 0 else - Stdlib.EventLog.appendResolutions w.resolutionEvents + Darklang.Sync.EventLog.appendResolutions w.resolutionEvents if branchApplied < 0 || packageApplied < 0 || resolutionApplied < 0 @@ -226,11 +226,11 @@ let rec pullLoop Stdlib.Result.Result.Error $"{peer}: a database error applying ops — stopped without advancing the cursor (retries on the next pull)" else - let _ = setCursor peer "branch_ops" (Stdlib.EventLog.cursorToInt w.branchCursor) - let _ = setCursor peer "package_ops" (Stdlib.EventLog.cursorToInt w.packageCursor) + let _ = setCursor peer "branch_ops" (Darklang.Sync.EventLog.cursorToInt w.branchCursor) + let _ = setCursor peer "package_ops" (Darklang.Sync.EventLog.cursorToInt w.packageCursor) let _ = - setCursor peer "resolutions" (Stdlib.EventLog.cursorToInt w.resolutionCursor) + setCursor peer "resolutions" (Darklang.Sync.EventLog.cursorToInt w.resolutionCursor) let caughtUp = Stdlib.List.length w.branchEvents == 0 @@ -240,9 +240,9 @@ let rec pullLoop // A well-behaved peer that returns events moves at least one cursor strictly forward; if it // doesn't, it's replaying and we'd loop forever — stop. let advanced = - (Stdlib.EventLog.cursorToInt w.packageCursor) > pkgSent - || (Stdlib.EventLog.cursorToInt w.branchCursor) > branchSent - || (Stdlib.EventLog.cursorToInt w.resolutionCursor) > resSent + (Darklang.Sync.EventLog.cursorToInt w.packageCursor) > pkgSent + || (Darklang.Sync.EventLog.cursorToInt w.branchCursor) > branchSent + || (Darklang.Sync.EventLog.cursorToInt w.resolutionCursor) > resSent let total = applied + branchApplied + packageApplied + resolutionApplied diff --git a/packages/darklang/stdlib/eventLog.dark b/packages/darklang/sync/eventLog.dark similarity index 100% rename from packages/darklang/stdlib/eventLog.dark rename to packages/darklang/sync/eventLog.dark diff --git a/packages/darklang/sync/server.dark b/packages/darklang/sync/server.dark index 36724502af..9c6811f7f1 100644 --- a/packages/darklang/sync/server.dark +++ b/packages/darklang/sync/server.dark @@ -4,7 +4,7 @@ module Darklang.Sync.Server // Run with `dark serve Darklang.Sync.Server.router --port ` and expose it over your tailnet with // `dark devices serve `. // -// The wire is JSON — `Darklang.Sync.wireSince` (← `Stdlib.EventLog.readSince`): the serving Release, the batch's +// The wire is JSON — `Darklang.Sync.wireSince` (← `Darklang.Sync.EventLog.readSince`): the serving Release, the batch's // commits, its events ((id, opBlobHex, branchId, commitHash, originTs) — the op_blob rides as hex), and the // cursor. Committed ops only (WIP stays local); one bounded batch per request. No .db files — ops over HTTP. // From a586399bea2068cdac9df2644eda1ac8db51db9e Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 23:18:09 -0400 Subject: [PATCH 038/172] =?UTF-8?q?comments:=20drop=20the=20"ops=20?= =?UTF-8?q?=E2=8A=A5=20projections"=20branding?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit It's one feature, not a brand — remove the ⊥ symbol and the "ops ⊥ projections" phrasing from Seed.fs and OpsProjections.Tests.fs comments, keeping the plain statement (the op log is canonical; projections are regenerable from it). Co-Authored-By: Claude Opus 4.8 --- backend/src/LibDB/Seed.fs | 10 +++++----- backend/tests/Tests/OpsProjections.Tests.fs | 6 +++--- 2 files changed, 8 insertions(+), 8 deletions(-) diff --git a/backend/src/LibDB/Seed.fs b/backend/src/LibDB/Seed.fs index 8bacf4b38c..58c14b77b2 100644 --- a/backend/src/LibDB/Seed.fs +++ b/backend/src/LibDB/Seed.fs @@ -9,9 +9,9 @@ /// On CLI startup the grow step runs automatically — if everything is already /// applied it's a single fast SELECT COUNT and returns immediately. /// -/// This module is also the home of **ops ⊥ projections**: the op log -/// (`package_ops`) is canonical; the package tables (functions/types/values, -/// locations, dependencies, deprecations) are regenerable *projections* folded +/// The op log (`package_ops`) is canonical; the package tables +/// (functions/types/values, locations, dependencies, deprecations) are +/// regenerable projections folded /// from it (`projectionTables`). `applyUnappliedOps` folds pending ops (append /// and fold are separable — the `applied` flag is the seam); `rebuildProjections` /// drops the projections, marks every op unapplied, and re-folds → byte-identical @@ -472,8 +472,8 @@ let projectionTables : List = "package_dependencies" "deprecations" ] -/// ops⊥projections: drop every projection table and re-fold the whole `package_ops` log to rebuild them. -/// Projections are regenerable from the ops (the ops⊥projections split) — losing one costs only the CPU to +/// Drop every projection table and re-fold the whole `package_ops` log to rebuild them. +/// Projections are regenerable from the ops — losing one costs only the CPU to /// re-fold; the op log is the canonical durable state and is never touched here. This is the schema-change / /// durable-canon path (drop projections, re-fold). Returns the count of ops re-applied. let rebuildProjections () : Task = diff --git a/backend/tests/Tests/OpsProjections.Tests.fs b/backend/tests/Tests/OpsProjections.Tests.fs index d5021ffcf4..bba867e109 100644 --- a/backend/tests/Tests/OpsProjections.Tests.fs +++ b/backend/tests/Tests/OpsProjections.Tests.fs @@ -1,5 +1,5 @@ -/// Tests for ops⊥projections (LibDB.Seed.rebuildProjections). -/// Proves the central claim of the storage split: the projection tables are +/// Tests for LibDB.Seed.rebuildProjections. +/// Proves the projection tables are /// *regenerable from the op log* — drop them, re-fold package_ops, and they /// come back identical. The op log (package_ops) is canonical and untouched. module Tests.OpsProjections @@ -132,7 +132,7 @@ let tests = // authored work. A *durable* Release step carries the op log forward (a schema copy-swap + an optional // op-format re-serialize); the projections are then dropped and RE-FOLDED from that same log in the // new Release's format. This is exactly why the two design pieces exist: - // • ops ⊥ projections — you migrate the LOG (the authored work), never the derived tables; the + // • the op log is canonical — you migrate the LOG (the authored work), never the derived tables; the // projections are disposable and regenerated. Losing a projection costs only CPU. // • meaning-stable hashing — a format re-serialize keeps each op's IDENTITY (the id hashes the op's // MEANING, not its bytes), so names/dependencies don't churn across the migration. From 954a7ef5a879338e8e8231aeb45fa823f68769d3 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 23:28:44 -0400 Subject: [PATCH 039/172] libdb: give SQL params real names instead of one letters MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit "b"/"o"/"m"/"n"/"t"/"h"/"c"/"r" as bound-param names (and @b/@o/… placeholders) are needless friction to read. Rename each to what it is — branchID, owner, modules, name, itemType, hash, caps — across Resolutions.fs, Conflicts.fs, PackageCaps.fs (Releases.fs's two carry with Stachu's concurrent edits there). Placeholder + param renamed together; MultiInstance + SyncScenarios green. Co-Authored-By: Claude Opus 4.8 --- backend/src/LibDB/Conflicts.fs | 4 +-- backend/src/LibDB/PackageCaps.fs | 8 +++--- backend/src/LibDB/Resolutions.fs | 44 ++++++++++++++++---------------- 3 files changed, 28 insertions(+), 28 deletions(-) diff --git a/backend/src/LibDB/Conflicts.fs b/backend/src/LibDB/Conflicts.fs index cf687e0268..57c3336e19 100644 --- a/backend/src/LibDB/Conflicts.fs +++ b/backend/src/LibDB/Conflicts.fs @@ -176,8 +176,8 @@ let detectDivergences // a long-superseded SetName records a phantom conflict (curBinding is the newer winner, so it looks // divergent) that surfaces in `dark conflicts` though nothing actually changed. let! applied = - Sql.query "SELECT applied FROM package_ops WHERE id = @id AND branch_id = @b" - |> Sql.parameters [ "id", Sql.uuid opId; "b", Sql.uuid branchId ] + Sql.query "SELECT applied FROM package_ops WHERE id = @id AND branch_id = @branchID" + |> Sql.parameters [ "id", Sql.uuid opId; "branchID", Sql.uuid branchId ] |> Sql.executeRowOptionAsync (fun read -> read.int64 "applied") match op, applied with diff --git a/backend/src/LibDB/PackageCaps.fs b/backend/src/LibDB/PackageCaps.fs index 8894c5635d..7c7d3fa197 100644 --- a/backend/src/LibDB/PackageCaps.fs +++ b/backend/src/LibDB/PackageCaps.fs @@ -41,8 +41,8 @@ let private fromB64 (s : string) : Cap.Capabilities = let get (hash : string) : Task> = task { let! rows = - Sql.query "SELECT caps FROM package_caps WHERE hash = @h" - |> Sql.parameters [ "h", Sql.string hash ] + Sql.query "SELECT caps FROM package_caps WHERE hash = @hash" + |> Sql.parameters [ "hash", Sql.string hash ] |> Sql.executeAsync (fun read -> read.string "caps") match rows with @@ -54,8 +54,8 @@ let get (hash : string) : Task> = /// Cache a fn's computed caps. Write-once (re-inserting the same hash is a no-op). let put (hash : string) (caps : Cap.Capabilities) : Task = Sql.query - "INSERT INTO package_caps (hash, caps) VALUES (@h, @c) ON CONFLICT(hash) DO NOTHING" - |> Sql.parameters [ "h", Sql.string hash; "c", Sql.string (toB64 caps) ] + "INSERT INTO package_caps (hash, caps) VALUES (@hash, @caps) ON CONFLICT(hash) DO NOTHING" + |> Sql.parameters [ "hash", Sql.string hash; "caps", Sql.string (toB64 caps) ] |> Sql.executeStatementAsync diff --git a/backend/src/LibDB/Resolutions.fs b/backend/src/LibDB/Resolutions.fs index dc797ae862..53a041b10b 100644 --- a/backend/src/LibDB/Resolutions.fs +++ b/backend/src/LibDB/Resolutions.fs @@ -59,11 +59,11 @@ let record (r : Resolution) : Task = Sql.query """ INSERT OR IGNORE INTO resolutions (id, branch_id, location, item_kind, chosen_hash, resolved_by, at) - VALUES (@id, @b, @location, @item_kind, @hash, @by, @at) + VALUES (@id, @branchID, @location, @item_kind, @hash, @by, @at) """ |> Sql.parameters [ "id", Sql.string r.id - "b", Sql.string (string r.branchId) + "branchID", Sql.string (string r.branchId) "location", Sql.string (Conflicts.locationString r.location) "item_kind", Sql.string (r.choice.kind.toString ()) "hash", Sql.string h @@ -86,16 +86,16 @@ let applyToLocations (r : Resolution) : Task = Sql.query """ SELECT item_hash, origin_ts FROM locations - WHERE owner = @o AND modules = @m AND name = @n AND item_type = @t - AND branch_id = @b AND unlisted_at IS NULL + WHERE owner = @owner AND modules = @modules AND name = @name AND item_type = @itemType + AND branch_id = @branchID AND unlisted_at IS NULL LIMIT 1 """ |> Sql.parameters - [ "o", Sql.string loc.owner - "m", Sql.string modulesStr - "n", Sql.string loc.name - "t", Sql.string itemTypeStr - "b", Sql.string (string r.branchId) ] + [ "owner", Sql.string loc.owner + "modules", Sql.string modulesStr + "name", Sql.string loc.name + "itemType", Sql.string itemTypeStr + "branchID", Sql.string (string r.branchId) ] |> Sql.executeRowOptionAsync (fun read -> (read.string "item_hash", read.stringOrNone "origin_ts")) @@ -115,15 +115,15 @@ let applyToLocations (r : Resolution) : Task = Sql.query """ UPDATE locations SET unlisted_at = datetime('now') - WHERE owner = @o AND modules = @m AND name = @n AND item_type = @t - AND branch_id = @b AND unlisted_at IS NULL + WHERE owner = @owner AND modules = @modules AND name = @name AND item_type = @itemType + AND branch_id = @branchID AND unlisted_at IS NULL """ |> Sql.parameters - [ "o", Sql.string loc.owner - "m", Sql.string modulesStr - "n", Sql.string loc.name - "t", Sql.string itemTypeStr - "b", Sql.string (string r.branchId) ] + [ "owner", Sql.string loc.owner + "modules", Sql.string modulesStr + "name", Sql.string loc.name + "itemType", Sql.string itemTypeStr + "branchID", Sql.string (string r.branchId) ] |> Sql.executeStatementAsync do! @@ -131,16 +131,16 @@ let applyToLocations (r : Resolution) : Task = """ INSERT INTO locations (location_id, item_hash, owner, modules, name, item_type, branch_id, commit_hash, origin_ts) - VALUES (@lid, @hash, @o, @m, @n, @t, @b, NULL, @at) + VALUES (@lid, @hash, @owner, @modules, @name, @itemType, @branchID, NULL, @at) """ |> Sql.parameters [ "lid", Sql.string (System.Guid.NewGuid() |> string) "hash", Sql.string chosenHash - "o", Sql.string loc.owner - "m", Sql.string modulesStr - "n", Sql.string loc.name - "t", Sql.string itemTypeStr - "b", Sql.string (string r.branchId) + "owner", Sql.string loc.owner + "modules", Sql.string modulesStr + "name", Sql.string loc.name + "itemType", Sql.string itemTypeStr + "branchID", Sql.string (string r.branchId) "at", Sql.string r.at ] |> Sql.executeStatementAsync } From ca10ec9a272bdebbce1175482e0e8d2997c78e4c Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 23:37:09 -0400 Subject: [PATCH 040/172] libdb: trim Seed.fs comments MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The module doc and several function docs were over-long and repeated themselves. Condense the module header (20→10 lines), the bulk-apply/FK-off block (19→7), and the eventsSince/branchOpsSince/receiveOps/growIfNeeded docs — keeping the non-obvious WHYs (deterministic replay order, FK-off + post-check, origin_ts preservation for LWW), cutting the narration. 174→144 comment lines; LibDB builds clean. Co-Authored-By: Claude Opus 4.8 --- backend/src/LibDB/Seed.fs | 94 +++++++++++++-------------------------- 1 file changed, 31 insertions(+), 63 deletions(-) diff --git a/backend/src/LibDB/Seed.fs b/backend/src/LibDB/Seed.fs index 58c14b77b2..7a5ed0a76b 100644 --- a/backend/src/LibDB/Seed.fs +++ b/backend/src/LibDB/Seed.fs @@ -1,23 +1,14 @@ /// Package seed: extract and grow. /// -/// A seed is a copy of data.db with projection tables emptied and ops marked -/// unapplied. It has the full schema so it can be used directly as a data.db. +/// A seed is a copy of data.db with the projection tables emptied and its ops marked unapplied (it carries +/// the full schema, so it works directly as a data.db). Export copies data.db, strips derived data, VACUUMs; +/// grow folds the unapplied ops back into the projections + evaluates values — runs on CLI startup, a single +/// SELECT COUNT when nothing's pending. /// -/// Export ("extract"): copy data.db, strip derived data, VACUUM. -/// Grow: apply unapplied ops to rebuild projection tables, evaluate values. -/// -/// On CLI startup the grow step runs automatically — if everything is already -/// applied it's a single fast SELECT COUNT and returns immediately. -/// -/// The op log (`package_ops`) is canonical; the package tables -/// (functions/types/values, locations, dependencies, deprecations) are -/// regenerable projections folded -/// from it (`projectionTables`). `applyUnappliedOps` folds pending ops (append -/// and fold are separable — the `applied` flag is the seam); `rebuildProjections` -/// drops the projections, marks every op unapplied, and re-folds → byte-identical -/// tables. This is what makes a schema change safe (drop projections, re-fold — -/// the op log is never touched: "durable-canon") and lets a synced peer's ops -/// fold in like any local edit. +/// The op log (`package_ops`) is canonical; the package tables are regenerable projections folded from it. +/// `applyUnappliedOps` folds pending ops (the `applied` flag is the append/fold seam); `rebuildProjections` +/// drops the projections, marks every op unapplied, and re-folds. So a schema change is safe (drop + re-fold, +/// never touching the log) and a synced peer's ops fold in like a local edit. module LibDB.Seed open System.Threading.Tasks @@ -128,10 +119,8 @@ let applyUnappliedOps () : Task = SELECT id, op_blob, branch_id, commit_hash FROM package_ops WHERE applied = 0 - -- rowid (insertion order) is the deterministic tiebreak: created_at is second-resolution, so a - -- batch's ops share it and ordering by created_at alone leaves same-second ops in an unspecified - -- order. The fold's final state is order-independent for the cases that matter (SetName resolves by - -- origin_ts; AddFn is by-hash), but a deterministic replay order keeps re-folds byte-identical. + -- rowid breaks ties: created_at is second-resolution so a batch's ops share it. The fold's final + -- state is order-independent, but a deterministic replay order keeps re-folds byte-identical. ORDER BY created_at ASC, rowid ASC """ |> Sql.executeAsync (fun read -> @@ -151,25 +140,13 @@ let applyUnappliedOps () : Task = (branchId, commitHash)) |> Map.toList - // Bulk cold-start path: open one connection, run all groups + the - // applied=1 sweep inside a single transaction with synchronous=OFF. - // For 9000+ ops this turns ~20k individual WAL commits into one and - // takes the apply phase from ~5s to well under a second. Crash - // safety isn't a concern here: an aborted run leaves applied=0 on - // the same ops, and the next boot replays them. Replay isn't strictly - // idempotent (location_id / deprecation_id come from Guid.NewGuid() - // so a partial-then-replay produces distinct rows for the same op) - // but the final-state projection is equivalent — pre-existing rows - // from the crashed run keep unlisted_at=NULL and get superseded by - // the replay's fresh inserts the same way a normal re-add would. - // - // FK enforcement is disabled for the duration. Microsoft.Data.Sqlite - // defaults `Foreign Keys=True` on the connection string; with that - // on, replaying ops in any order other than perfect topological - // tripped FK violations (locations referencing branches that arrive - // later in the batch, etc.). Standard bulk-load practice in SQLite - // is OFF-bulk-load-CHECK; we run `PRAGMA foreign_key_check` after - // commit and fail loudly if any actual violations were introduced. + // Apply every group + the applied=1 sweep in ONE transaction with synchronous=OFF: for 9000+ ops + // this collapses ~20k WAL commits into one (apply phase ~5s → sub-second). Not crash-safe by design — + // an aborted run leaves applied=0 and the next boot replays; replay isn't byte-idempotent (fresh Guid + // ids) but the final projection is equivalent (crashed-run rows get superseded like a normal re-add). + // FK enforcement is off for the load — replaying ops out of topological order trips FKs (e.g. a + // location before the branch it references) — so we `PRAGMA foreign_key_check` after commit and fail + // loudly on any real violation. use conn = new SqliteConnection(LibDB.Sqlite.connString) do! conn.OpenAsync() let runRaw (sql : string) : Task = @@ -257,11 +234,9 @@ let applyUnappliedOps () : Task = } -/// The committed events after `cursor` from this instance's own log (≤ `limit`), the commits they -/// reference, and the new cursor (max rowid in the batch, or `cursor` if nothing is new). Exactly what a -/// peer serves — the READ half of the event-log seam. Native (F#) so serving a large batch doesn't pay -/// per-row interpreter overhead (a Dark `List.map` + `Dict.get` over thousands of rows is seconds; this -/// is milliseconds). Each event is (id, opBlobHex, branchId, commitHash, originTs); each commit is +/// The committed events after `cursor` (≤ `limit`), the commits they reference, and the new cursor (max +/// rowid, or `cursor` if nothing new) — what a peer serves. Native so a large batch is milliseconds, not the +/// seconds a per-row Dark fold would cost. Event = (id, opBlobHex, branchId, commitHash, originTs); commit = /// (hash, message, branchId, accountId, createdAt). let eventsSince (cursor : int64) @@ -313,11 +288,9 @@ let eventsSince return (commits, events, newCursor) } -/// The branch ops after from this instance's `branch_ops` log, as (id, opBlob-as-hex, originTs) -/// triples, plus the new cursor (max rowid, or if nothing new). Branch ops carry their own -/// structure (branch, commit, merge, …) inside the blob, so — unlike package events — they need no side -/// metadata beyond the authoring stamp. Ordered by rowid so a receiver applies them in the same order -/// (CreateBranch before dependent ops). +/// The branch ops after `cursor` as (id, opBlobHex, originTs) + the new cursor. Branch ops carry their +/// structure (branch/commit/merge/…) in the blob, so — unlike package events — they need no side metadata +/// beyond the authoring stamp. Ordered by rowid so a receiver applies them in order (CreateBranch first). let branchOpsSince (cursor : int64) (limit : int64) @@ -370,13 +343,11 @@ let receiveBranchOps (events : List) : Task = return applied } -/// Append events RECEIVED from a peer (over HTTP) into the local op log, then fold them into the -/// projections — the general event-log append (`Builtin.appendEvents`). Unlike `insertAndApplyOps` -/// (the LOCAL-authoring path, which stamps a fresh `nextOriginTs`), this PRESERVES each op's original -/// `origin_ts` — essential for the timestamp-LWW to converge the same on every instance regardless of -/// arrival order. Idempotent: `INSERT OR IGNORE` on the content-addressed id, and only unapplied ops -/// fold. Returns the number of ops NEWLY applied (INSERT OR IGNORE skips already-present ones), so a puller -/// reports the real change count. Folding stays here (F#) — invisible to Dark. +/// Append peer-received events into the local op log, then fold them into the projections. Unlike the +/// local-authoring path, this PRESERVES each op's original `origin_ts` — the timestamp-LWW needs it to +/// converge the same on every instance regardless of arrival order. Idempotent (`INSERT OR IGNORE` on the +/// content-addressed id; only unapplied ops fold). Returns the count NEWLY applied, so a puller reports the +/// real change count. let receiveOps (commits : List) (events : List) @@ -616,12 +587,9 @@ let evaluateAllValues } -/// The grow step for CLI/test startup. -/// Applies any unapplied ops, generates package ref hashes, then evaluates values. -/// On a warm DB this is a single fast SELECT COUNT and returns immediately. -/// -/// builtins is a function (not a value) because it must be constructed AFTER -/// hashes are generated — builtin construction triggers PackageRefs hash lookups. +/// The grow step for CLI/test startup: apply unapplied ops, generate package ref hashes, evaluate values. +/// On a warm DB it's a single fast SELECT COUNT. `getBuiltins` is a function, not a value, because builtins +/// must be constructed AFTER the hashes exist (construction triggers PackageRefs hash lookups). let growIfNeeded (getBuiltins : unit -> RT.Builtins) (pm : RT.PackageManager) From ed19badd57c9a75136afc86f6541e4a5e767f4fc Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 23:41:20 -0400 Subject: [PATCH 041/172] libdb: tighten verbose comments in Inserts.fs + PackageOpPlayback.fs MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Condense over-long function docs (insertAndApplyOps two-phase list 11→3, commitWipOpsByIds 10→3, originTs stamp 8→5, applyDeprecate 8→3, dep-edge note 4→2), keeping the WHYs (applied-flag retryability, monotonic-stamp LWW ordering, hash-keyed deprecation caveat), cutting narration + the speculative asides. Comment-only; LibDB builds clean. Co-Authored-By: Claude Opus 4.8 --- backend/src/LibDB/Inserts.fs | 40 +++++++------------------- backend/src/LibDB/PackageOpPlayback.fs | 16 ++++------- 2 files changed, 16 insertions(+), 40 deletions(-) diff --git a/backend/src/LibDB/Inserts.fs b/backend/src/LibDB/Inserts.fs index a5d0a0e508..e70d14c7c1 100644 --- a/backend/src/LibDB/Inserts.fs +++ b/backend/src/LibDB/Inserts.fs @@ -24,14 +24,11 @@ let computeOpHash (op : PT.PackageOp) : System.Guid = System.Guid(hashBytes[0..15]) -/// A process-monotonic authoring stamp (`origin_ts`). Millisecond-resolution wall clock, but never -/// non-increasing: within one millisecond a batch's ops would otherwise share a stamp, and the -/// timestamp-LWW in `applySetName` would then break the tie by content hash — silently reordering *local -/// sequential* edits (rename v1 then v2 could leave v1 winning). So each call returns `max(nowMs, last+1ms)`: -/// a local batch gets strictly-increasing stamps, so a later edit always wins its location. The string -/// format matches the schema default `strftime('%Y-%m-%dT%H:%M:%fZ')`, so it stays lexically comparable -/// with existing rows and peers. (A future hardening could generalize this to a hybrid logical clock that -/// also advances the stamp on receive, so a skewed peer clock can't pin a binding.) +/// A process-monotonic authoring stamp (`origin_ts`): millisecond wall clock, but returns `max(nowMs, +/// last+1ms)` so it never repeats within a batch. Otherwise same-ms ops would tie and the LWW in +/// `applySetName` would break it by content hash — silently reordering local sequential edits (rename v1 +/// then v2 could leave v1 winning). Strictly-increasing stamps mean the later edit always wins. Format +/// matches the schema default `strftime('%Y-%m-%dT%H:%M:%fZ')` so it stays lexically comparable across peers. let private originTsLock = System.Object() let mutable private lastOriginTs = System.DateTime.MinValue @@ -52,17 +49,9 @@ let nextOriginTs () : string = )) -/// Insert PackageOps into the package_ops table and apply them to projection tables. -/// branchId = branch context -/// commitHash = None means WIP (commit_hash = NULL), Some id means committed -/// Returns the count of ops actually inserted (duplicates are skipped via INSERT OR IGNORE) -/// -/// Uses a two-phase approach for consistency: -/// 1. Insert ops with applied=false -/// 2. Apply ops to projection tables -/// 3. Mark ops as applied=true -/// -/// This ensures that if step 2 fails, we can identify unapplied ops and retry/rollback. +/// Insert PackageOps and fold them into the projections. `commitHash = None` = WIP (commit_hash NULL), `Some` +/// = committed. Returns the count actually inserted (duplicates skipped via INSERT OR IGNORE). Insert with +/// applied=false, fold, then mark applied=true — so a mid-fold failure leaves the ops identifiable + retryable. let insertAndApplyOps (branchId : PT.BranchId) (commitHash : Option) @@ -387,16 +376,9 @@ let rec commitWipOps } -/// Commit exactly the WIP ops with the given IDs. -/// -/// The caller owns selection policy. This function validates that every -/// requested id is still WIP, creates the commit, and stamps the selected ops -/// plus their derived projection rows. If the requested ids cover the whole WIP -/// set, it uses the commit-all projection path. -/// -/// CLEANUP: if SCM becomes a shared multi-writer service, move validation, -/// parent lookup, commit creation, and row stamping into one transaction -/// on one connection. +/// Commit exactly the WIP ops with the given ids (the caller owns selection policy): validate each is still +/// WIP, create the commit, stamp the ops + their projection rows. A full-WIP set uses the commit-all path. +/// CLEANUP: if SCM becomes multi-writer, do validation + commit creation + stamping in one transaction. and commitWipOpsByIds (accountId : AccountID) (branchId : PT.BranchId) diff --git a/backend/src/LibDB/PackageOpPlayback.fs b/backend/src/LibDB/PackageOpPlayback.fs index 6cdfb45d78..a49c6042c8 100644 --- a/backend/src/LibDB/PackageOpPlayback.fs +++ b/backend/src/LibDB/PackageOpPlayback.fs @@ -421,14 +421,9 @@ let private serializeAnnotation ms.ToArray() -/// Apply a Deprecate op to the deprecations projection table. -/// Supersedes any prior un-superseded row for (branch, item_hash, item_kind). -/// -/// CLEANUP: deprecation identity is hash-keyed (`Reference` carries only a -/// Hash). When two unrelated FQNs share a content hash, deprecating one -/// deprecates both. We need to extend `Reference` (and the `deprecations` -/// table) to carry location, then teach the query to filter by -/// `(owner, modules, name)` like dependent lookups do. +/// Apply a Deprecate op — supersede any prior un-superseded row for (branch, item_hash, item_kind). +/// CLEANUP: identity is hash-keyed (`Reference` carries only a Hash), so two unrelated FQNs sharing a hash +/// deprecate together. Fix: carry location on `Reference` + the `deprecations` table and filter by it. let private applyDeprecate (ctx : Ctx) (branchId : PT.BranchId) @@ -678,9 +673,8 @@ let private collectAddedHashes (ops : List) : Set = /// fresh prepared-statement cache (Ctx) is created and disposed per call, /// so the cache lifetime matches a single `applyOpsOnConnection` invocation. /// -/// Dep-edge location columns are populated directly from each `Dependency`'s -/// `location` field (the resolver stashes it onto `NameResolution<_>` at -/// resolve time). No post-hoc backfill needed. +/// Dep-edge location columns come straight from each `Dependency`'s `location` (stashed on `NameResolution` +/// at resolve time) — no post-hoc backfill. let applyOpsOnConnection (conn : SqliteConnection) (branchId : PT.BranchId) From c08d926ea5d6d7b151028143c22df4502132aaa0 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 23:44:35 -0400 Subject: [PATCH 042/172] PR review: reflow HttpClient socket comment, SQL param names in Releases, EventLog module rename --- .../src/Builtins/Builtins.Http.Client/Libs/HttpClient.fs | 8 +++++--- backend/src/LibDB/Releases.fs | 8 ++++---- packages/darklang/sync/eventLog.dark | 2 +- 3 files changed, 10 insertions(+), 8 deletions(-) diff --git a/backend/src/Builtins/Builtins.Http.Client/Libs/HttpClient.fs b/backend/src/Builtins/Builtins.Http.Client/Libs/HttpClient.fs index 655239d021..c2f64ccb4e 100644 --- a/backend/src/Builtins/Builtins.Http.Client/Libs/HttpClient.fs +++ b/backend/src/Builtins/Builtins.Http.Client/Libs/HttpClient.fs @@ -202,9 +202,11 @@ module BaseClient = // Use this to hide more specific errors when looking at loopback Exception.raiseInternal "Could not connect" [] - // Create the socket with the resolved IP's address family (v4 vs v6). The 2-arg ctor defaults - // to IPv6, which only reaches an IPv4 literal (e.g. 127.0.0.1) when the host has IPv6 dual-mode - // — absent in some containers, giving a NetworkError. Matching the family connects either way. + // Create the socket with the resolved IP's address family (v4 vs v6). + // The 2-arg ctor defaults to IPv6, which only reaches an IPv4 literal + // (e.g. 127.0.0.1) when the host has IPv6 dual-mode + // — absent in some containers, giving a NetworkError. + // Matching the family connects either way. let socket = new System.Net.Sockets.Socket( ips[0].AddressFamily, diff --git a/backend/src/LibDB/Releases.fs b/backend/src/LibDB/Releases.fs index aaa1371309..18382e914d 100644 --- a/backend/src/LibDB/Releases.fs +++ b/backend/src/LibDB/Releases.fs @@ -92,8 +92,8 @@ let private releaseTable = "release_state_v0" /// The Release this store was last stamped at, or `None` if it predates Release tracking (or is fresh). let storedRelease () : int option = let exists = - Sql.query "SELECT 1 FROM sqlite_master WHERE type = 'table' AND name = @n" - |> Sql.parameters [ "n", Sql.string releaseTable ] + Sql.query "SELECT 1 FROM sqlite_master WHERE type = 'table' AND name = @name" + |> Sql.parameters [ "name", Sql.string releaseTable ] |> Sql.executeExistsSync if not exists then None @@ -111,8 +111,8 @@ let writeRelease (n : int) : unit = Sql.query $"CREATE TABLE IF NOT EXISTS {releaseTable} (id INTEGER PRIMARY KEY, \"release\" INTEGER NOT NULL)" |> Sql.executeStatementSync - Sql.query $"INSERT OR REPLACE INTO {releaseTable} (id, \"release\") VALUES (0, @r)" - |> Sql.parameters [ "r", Sql.int64 (int64 n) ] + Sql.query $"INSERT OR REPLACE INTO {releaseTable} (id, \"release\") VALUES (0, @release)" + |> Sql.parameters [ "release", Sql.int64 (int64 n) ] |> Sql.executeStatementSync diff --git a/packages/darklang/sync/eventLog.dark b/packages/darklang/sync/eventLog.dark index 32ac5a2d78..f844eb30fe 100644 --- a/packages/darklang/sync/eventLog.dark +++ b/packages/darklang/sync/eventLog.dark @@ -1,4 +1,4 @@ -module Darklang.Stdlib.EventLog +module Darklang.Sync.EventLog // The native read/append API over the three op-log tables (`package_ops`, `branch_ops`, `resolutions`). // Read the events SINCE a cursor (a peer serves them; the events come back as a filterable Stream), and From 1a0ab390ab34b47b65b1bb61001d55f1770652b2 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 23:47:00 -0400 Subject: [PATCH 043/172] =?UTF-8?q?cli:=20simplify=20store=20reconcile=20?= =?UTF-8?q?=E2=80=94=20collapse=20pretracking=20into=20the=20None=20path,?= =?UTF-8?q?=20hard-fail=20on=20unreadable?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Drop the 3-case StoreRelease enum. readStoredRelease now returns `int option` (Some stamp / None = opened-but-unstamped, which planCliUpgrade already routes to a reseed). A db that can't be opened at all is no longer silently skipped — it prints a clear message and exits 1, so a lock or corruption can't be mistaken for a stale store and trigger a data-destroying reseed. Co-Authored-By: Claude Opus 4.8 --- backend/src/Cli/EmbeddedResources.fs | 85 +++++++++++++--------------- 1 file changed, 38 insertions(+), 47 deletions(-) diff --git a/backend/src/Cli/EmbeddedResources.fs b/backend/src/Cli/EmbeddedResources.fs index 2c7d64098f..5bc123a9a3 100644 --- a/backend/src/Cli/EmbeddedResources.fs +++ b/backend/src/Cli/EmbeddedResources.fs @@ -86,17 +86,12 @@ let private hasEmbeddedResource (resourceName : string) : bool = // LocalExec migrator. So on startup we reconcile the store's Release stamp with this binary's // `LibDB.Releases.currentRelease` before any LibDB connection is opened. -/// The store's Release, as read at startup. -type private StoreRelease = - | Stamped of int // release_state_v0 has a row — a definitive answer - | PreTracking // opened fine, but no release_state_v0 — predates Release tracking - | Unreadable // couldn't open/query the db at all — do NOT destroy it (may be locked, not stale) - -/// Read the store's Release stamp via a throwaway, NON-POOLED connection, so LibDB's own (pooled) shared -/// connection is never opened here — a reseed moves the db file aside, and a pooled handle would keep -/// pointing at the moved inode. Distinguishes "opened fine but stale" (safe to reseed) from "couldn't read" -/// (a transient lock / permission issue — must NOT trigger a data-destroying reseed). -let private readStoredRelease (dbPath : string) : StoreRelease = +/// Read the store's Release stamp via a throwaway, NON-POOLED read-only connection, so LibDB's own (pooled) +/// shared connection is never opened here — a reseed moves the db file aside, and a pooled handle would keep +/// pointing at the moved inode. `Some r` = stamped; `None` = opened fine but no stamp (treated as a stale +/// store to re-seed). If the db can't be opened/read at all, hard-fail — a lock or corruption must not be +/// mistaken for "stale" and trigger a data-destroying reseed. +let private readStoredRelease (dbPath : string) : int option = try use conn = new Microsoft.Data.Sqlite.SqliteConnection( @@ -107,15 +102,18 @@ let private readStoredRelease (dbPath : string) : StoreRelease = tableCmd.CommandText <- "SELECT 1 FROM sqlite_master WHERE type = 'table' AND name = 'release_state_v0'" match tableCmd.ExecuteScalar() with - | null -> PreTracking + | null -> None | _ -> use cmd = conn.CreateCommand() cmd.CommandText <- "SELECT \"release\" FROM release_state_v0 WHERE id = 0" match cmd.ExecuteScalar() with - | null -> PreTracking - | v -> Stamped(Convert.ToInt32 v) - with _ -> - Unreadable + | null -> None + | v -> Some(Convert.ToInt32 v) + with ex -> + eprintfn $"Cannot open the Darklang data store at {dbPath}: {ex.Message}" + eprintfn + "Close any other Darklang processes and retry, or move that file aside to start fresh." + exit 1 /// The peer URLs configured in a store, or [] if the table is absent / unreadable. Peers are sync CONFIG /// (owned by `sync_peers_v0` in packages/darklang/sync.dark), not disposable package content. @@ -191,37 +189,30 @@ let private reseedAndReport /// Reconcile an existing store's Release with this binary's. Called only when data.db already exists. let private reconcileExistingStore (dbPath : string) : unit = let current = LibDB.Releases.currentRelease - match readStoredRelease dbPath with - | Unreadable -> () // couldn't read it — don't touch it; the normal open will proceed or fail loudly - | storeRel -> - let stored = - match storeRel with - | Stamped r -> Some r - | _ -> None - let label = - match storeRel with - | Stamped r -> $"release{r}" - | _ -> "pretracking" - match LibDB.Releases.planCliUpgrade LibDB.Releases.releases stored current with - | LibDB.Releases.CliUpgrade.Proceed -> () // up to date - | LibDB.Releases.CliUpgrade.RefuseNewer r -> - // A newer store must not be opened by older code (it could corrupt the newer format). Refuse. - eprintfn - $"This Darklang data directory is from a newer release (Release {r}); this binary is Release {current}." - eprintfn - $"Upgrade the CLI, or move {dbPath} aside to start fresh — refusing to open it with older code." - exit 1 - | LibDB.Releases.CliUpgrade.MigrateInPlace -> - // Every pending step is durable — migrate the store forward in place, PRESERVING the data (schema - // copy-swap + op-format re-serialize + refold). No source needed, so the CLI can run it directly. - LibDB.Releases.applyPending current - eprintfn - $"Upgraded this data directory from {label} to Release {current} (data preserved)." - | LibDB.Releases.CliUpgrade.Reseed -> - // A clean-break Release (content hashing changed) or a pre-tracking store of unknown format: the old - // package data can't be reused in place, so back it up and re-seed from the embedded current-Release - // store. - reseedAndReport dbPath current label + let stored = readStoredRelease dbPath + let label = + match stored with + | Some r -> $"release{r}" + | None -> "an untracked store" + match LibDB.Releases.planCliUpgrade LibDB.Releases.releases stored current with + | LibDB.Releases.CliUpgrade.Proceed -> () // up to date + | LibDB.Releases.CliUpgrade.RefuseNewer r -> + // A newer store must not be opened by older code (it could corrupt the newer format). Refuse. + eprintfn + $"This Darklang data directory is from a newer release (Release {r}); this binary is Release {current}." + eprintfn + $"Upgrade the CLI, or move {dbPath} aside to start fresh — refusing to open it with older code." + exit 1 + | LibDB.Releases.CliUpgrade.MigrateInPlace -> + // Every pending step is durable — migrate the store forward in place, PRESERVING the data (schema + // copy-swap + op-format re-serialize + refold). No source needed, so the CLI can run it directly. + LibDB.Releases.applyPending current + eprintfn $"Upgraded this data directory from {label} to Release {current} (data preserved)." + | LibDB.Releases.CliUpgrade.Reseed -> + // A clean-break Release (content hashing changed) or an untracked store of unknown format: the old + // package data can't be reused in place, so back it up and re-seed from the embedded current-Release + // store. + reseedAndReport dbPath current label let extract () : unit = // The embedded resource is `data.db.gz` (the seed db, gzip-compressed at From 070a031e244380e6c732bee6c6030dc6f06e70ab Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 23:54:51 -0400 Subject: [PATCH 044/172] localexec: drop vestigial adoptLegacyDB from the migrator MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit adoptLegacyDB's writeHash was redundant (the None branch stamps regardless) and its bool return was discarded — its only net effect was a log line for legacy DBs, which (this being the first release that counts) don't matter. Removing it collapses the None branch to run-schema.sql + stamp, and trims the legacy prose. Fresh-build behavior is identical (adopt returned false for a fresh DB anyway); suite green (9,958, 0 failed). Co-Authored-By: Claude Opus 4.8 --- backend/src/LocalExec/Migrations.fs | 46 +++-------------------------- 1 file changed, 4 insertions(+), 42 deletions(-) diff --git a/backend/src/LocalExec/Migrations.fs b/backend/src/LocalExec/Migrations.fs index b757074de7..51a4f3a201 100644 --- a/backend/src/LocalExec/Migrations.fs +++ b/backend/src/LocalExec/Migrations.fs @@ -26,10 +26,6 @@ /// synchronously. /// /// CLEANUP maybe move this to LibDB? -/// -/// A legacy DB (one whose `system_migrations_v0` already lists the full -/// set of old migration names) is adopted: stamp the current schema hash -/// without dropping data. module LocalExec.Migrations open System.IO @@ -121,31 +117,6 @@ let private writeHash (hash : string) : unit = |> Sql.executeStatementSync -/// A legacy DB was migrated by name through `system_migrations_v0`. If one -/// already has the full set of old migration names applied, treat it as -/// fully migrated under the schema-hash flow — write the current schema -/// hash so subsequent runs see "up to date" and don't kill-and-fill. -let private adoptLegacyDB (currentHash : string) : bool = - if not (tableExists "system_migrations_v0") then - false - else - let count = - match - Sql.query "SELECT COUNT(*) AS c FROM system_migrations_v0" - |> Sql.execute (fun read -> read.int "c") - with - | Ok [ c ] -> c - | _ -> 0 - if count >= 13 then - print - $"Adopting legacy DB ({count} migrations on record). \ - Stamping schema hash; no data dropped." - writeHash currentHash - true - else - false - - let private runSchemaBootstrap () : unit = let sql = File.readfile Config.Migrations schemaFile let want = computeHash sql @@ -168,15 +139,9 @@ let private runSchemaBootstrap () : unit = markOpsUnapplied () writeHash want | None -> - // Fresh OR legacy DB with no schema-hash: always run schema.sql first (CREATE TABLE IF NOT EXISTS — - // creates any missing tables, e.g. `resolutions`/`sync_conflicts`, and is a no-op for existing ones), THEN - // stamp. Previously the adopt path stamped WITHOUT running schema.sql, so a legacy DB was marked current - // while missing the new sync tables and crashed on the first receive/resolution. - // CLEANUP(legacy-shape): CREATE IF NOT EXISTS can't ADD columns to a pre-existing legacy table (an old - // package_ops without origin_ts / the (id, branch_id) PK), so a genuine pre-cutover DB still needs a manual - // rebuild before it can sync. A loud shape-mismatch check is the follow-up if any such DB is still around. + // A store with no schema-hash stamp (fresh, or predates hash tracking): run schema.sql + // (CREATE TABLE IF NOT EXISTS creates missing tables and no-ops existing ones), then stamp. Sql.query sql |> Sql.executeStatementSync - let _ = adoptLegacyDB want // logs the adoption note for a legacy DB; a fresh DB just falls through writeHash want @@ -263,10 +228,7 @@ let private runIncrementalMigrations () : unit = let run () : unit = runSchemaBootstrap () - // The Release migrator: after the schema-hash bootstrap, reconcile the store's Release coordinate - // (the op-format/language/hash version) with this binary's. A fresh store is stamped at the current - // Release; an older store runs the pending migration steps; a NEWER store is refused (older code - // must not open it). The single coordinate is `LibDB.Releases.currentRelease` (when sync returns, its - // wire-format version is this same integer). The step registry lives in `LibDB.Releases`. + // Then reconcile the store's Release (op-format/hash version) with this binary's: stamp a fresh store, + // migrate an older one forward, refuse a newer one. Registry + logic live in `LibDB.Releases`. LibDB.Releases.applyPending LibDB.Releases.currentRelease runIncrementalMigrations () From 1ec1a97282c8a0f2545adecdf07b42335113f7b0 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 23:56:06 -0400 Subject: [PATCH 045/172] libdb: de-dup the Release doc prose The module doc, the `releases` registry doc, and the `clearForRebuild` field doc each re-explained "Release 3 = clean break = meaning-stable hashing". Trim the overlap so each says it once; no logic change (LibDB builds clean). Co-Authored-By: Claude Opus 4.8 --- backend/src/LibDB/Releases.fs | 29 +++++++++++------------------ 1 file changed, 11 insertions(+), 18 deletions(-) diff --git a/backend/src/LibDB/Releases.fs b/backend/src/LibDB/Releases.fs index 18382e914d..694ea5bcab 100644 --- a/backend/src/LibDB/Releases.fs +++ b/backend/src/LibDB/Releases.fs @@ -12,10 +12,8 @@ /// Projections are dropped+refolded, never migrated. Forward-only; the undo is "restore from a peer" /// (every peer holds the whole log, so the tailnet is the backup). /// -/// The current baseline is **Release 3** — a fresh store is born here. The lone registry entry records -/// why 3 is a clean break (meaning-stable hashing redefined every content hash), but because no older -/// store exists, no store ever replays it; the machinery is in place for the first real format change, -/// which appends the next entry. See `releases`. +/// The current baseline is **Release 3** — a fresh store is born here; see `releases` for why 3 is a +/// clean break and how the first real format change appends the next entry. module LibDB.Releases open Prelude @@ -23,10 +21,8 @@ open Prelude open Fumble open LibDB.Sqlite -/// THE version coordinate: the single integer spanning {language/`ProgramTypes`, op-serialization format, -/// SQL schema, content-hashing}. A store is stamped with this Release; older code refuses to open a store -/// stamped NEWER. Cross-instance sync's wire-format version IS this same integer — one coordinate gates both -/// the local store upgrade and cross-instance compatibility. +/// THE version coordinate (see the module doc). A store is stamped with this Release; older code refuses +/// to open a store stamped NEWER, and cross-instance sync uses this same integer as its wire-format version. let currentRelease : int = 3 /// One forward step that ARRIVES at Release `n` (apply it to move a store from `n-1` to `n`). @@ -39,12 +35,10 @@ type Release = /// op-format remap (old `op_blob` bytes → new), only when the serialization format changed. /// `None` = the op format is unchanged at this step (the common case). reserialize : (byte[] -> byte[]) option - /// CLEAN-BREAK boundary: when `true`, pre-this-Release data is treated as disposable and the package - /// dataset is CLEARED so the store rebuilds from source (dev) or re-pulls from a same-Release peer - /// (tailnet). Use this only when the change can't be cheaply migrated AND the old data is disposable - /// — e.g. a content-hash redefinition. The default (`false`) is the durable path (sql/reserialize + - /// re-fold). The PRINCIPLE: PT (the op log) is the source of truth and migrates forward; RT-derived - /// data (rt_dval, traces) is never migrated — it's dropped and recomputed from PT. + /// CLEAN-BREAK boundary: when `true`, pre-this-Release data is disposable — the package dataset is + /// CLEARED and rebuilds from source (dev) or re-pulls from a same-Release peer. Use only when the + /// change can't be cheaply migrated (e.g. a content-hash redefinition). The default (`false`) is the + /// durable path: the canonical copy-swap `.sql` + op-format reserialize + re-fold, keeping the log. clearForRebuild : bool } @@ -53,10 +47,9 @@ type Release = /// migrator does the rest. Each `n` must be exactly one greater than the previous (see /// `registryIsWellFormed`). /// -/// **Release 3 — meaning-stable hashing.** Content hashes are now over the alpha-normalized canonical -/// form, so older `op_blob`s would embed stale hashes and can't be cheaply migrated — hence the -/// CLEAN-BREAK marker (`clearForRebuild`). In practice every store is BORN at Release 3 and never runs -/// this step; it stands as the worked example of the clean-break path and the registry's upper bound. +/// **Release 3 — meaning-stable hashing.** Hashes are now over the alpha-normalized canonical form, so +/// older `op_blob`s embed stale hashes and can't be cheaply migrated — hence the CLEAN-BREAK marker. Every +/// store is BORN at Release 3 and never replays this step; it's the worked example of the clean-break path. let releases : Release list = [ { n = 3; sql = ""; reserialize = None; clearForRebuild = true } ] From 59bb38623c16af08419a0180cb82e65a3c1ab70c Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Mon, 13 Jul 2026 23:58:28 -0400 Subject: [PATCH 046/172] builtins: fix stale Sqlite deferred-list note + tighten module doc MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The doc listed "a typed Sqlite.Value enum" as deferred, but Value IS implemented (results carry types through it); the real deferral is typed PARAMS (binding is string-only). Reword to say that, drop the Surface paragraph that duplicated the fns() comment, and remove that now-redundant inline comment. Reviewed the surface: exec/execP/query/queryP + the convenience helpers are all used (directly or as building blocks) — it's a good minimal 2-builtin API, no dead code to cut. Co-Authored-By: Claude Opus 4.8 --- .../src/Builtins/Builtins.Matter/Libs/Sqlite.fs | 17 ++++++----------- 1 file changed, 6 insertions(+), 11 deletions(-) diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs b/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs index b59e9986a5..71665062c6 100644 --- a/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs +++ b/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs @@ -2,15 +2,13 @@ /// live in Dark over an ordinary database. (The internal sync machinery — op-log read/append, blob channel, /// store path + Release coordinate — lives in `Libs/Sync.fs`, not here.) /// -/// Surface: `sqliteExec` (DDL/DML → rows affected) and `sqliteQuery` (SELECT → each row as a typed -/// `Dict`), each taking a `params` list bound to @p0..@pN (injection-safe; [] for none). The `.dark` -/// `Stdlib.Sqlite.exec/execP/query/queryP` wrappers layer the with/without-params convenience on top, so -/// there's one builtin per operation rather than four. +/// `sqliteExec` (DDL/DML → rows affected) and `sqliteQuery` (SELECT → each row as a typed `Dict`) +/// are the two primitives; the `.dark` wrappers add the with/without-params convenience so there's one +/// builtin per operation rather than four. Both open a caller-supplied path, so they declare +/// `Needs.fileReadWrite` (the CLI host grants it; a narrowed `dark run` is denied). /// -/// The `sqlite*` builtins open a caller-supplied file path, so they declare `Needs.fileReadWrite` (the CLI host -/// grants it; untrusted `dark run` under a narrowed grant is denied). They still don't scope to a SPECIFIC -/// path in-body — that (a `sqlite:open:` cap) is a follow-up. Minimal extras also deferred: an opaque -/// connection-registry `Db` handle, a typed `Sqlite.Value` enum, and `transact`. +/// Deferred (not needed yet): scoping the grant to a specific path/glob, binding typed params (params are +/// string-only today; results already carry types via `Value`), an opaque connection handle, and `transact`. /// CLEANUP(sqlite-scope): add the in-body path/glob capability check. module Builtins.Matter.Libs.Sqlite @@ -124,9 +122,6 @@ let private queryImpl } let fns () : List = - // Two raw-SQLite primitives — exec (DDL/DML) and query (SELECT) — each binding @p0..@pN params - // (injection-safe; pass [] for none). The `.dark` Stdlib.Sqlite.exec/execP/query/queryP wrappers layer the - // with-params / without-params convenience on top, so there's one builtin per operation rather than four. [ { name = fn "sqliteExec" 0 typeParams = [] parameters = From 692801c8f340794059b94291ba2a055202ae082b Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 00:16:58 -0400 Subject: [PATCH 047/172] builtins: return conflicts as a typed record, not an 8-string tuple MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit conflictsList crossed as an 8-tuple of same-typed strings, which the CLI then destructured and repacked into its own Conflict record — fragile (positional) and boilerplatey. Cross it as a proper DRecord instead, matching how Sync.fs / Traces.fs return package records. The record type moves to the sync domain (Darklang.Sync.Conflicts.Conflict, referenced via PackageRefs) so the builtin and the CLI share one definition; the CLI's conflicts() collapses to a direct call. Suite green (9,958, 0 failed). Co-Authored-By: Claude Opus 4.8 --- .../Builtins.Matter/Libs/Conflicts.fs | 55 ++++++++----------- backend/src/LibExecution/PackageRefs.fs | 4 ++ packages/darklang/cli/conflicts.dark | 32 ++--------- packages/darklang/sync/conflicts.dark | 12 ++++ 4 files changed, 46 insertions(+), 57 deletions(-) create mode 100644 packages/darklang/sync/conflicts.dark diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Conflicts.fs b/backend/src/Builtins/Builtins.Matter/Libs/Conflicts.fs index 95aed81091..8c2d17e325 100644 --- a/backend/src/Builtins/Builtins.Matter/Libs/Conflicts.fs +++ b/backend/src/Builtins/Builtins.Matter/Libs/Conflicts.fs @@ -1,7 +1,6 @@ /// Builtins for the sync Conflict/Resolution UX (`dark conflicts`). Conflicts are the LOCAL review log of /// divergences; a human decision (`conflictKeep`) mints a SYNCED `Resolution` that overrides the op-fold and -/// converges on peers. Low-volume (a handful of divergences), so these return plain tuples — no native record -/// construction needed. +/// converges on peers. module Builtins.Matter.Libs.Conflicts open FSharp.Control.Tasks @@ -11,50 +10,44 @@ open LibExecution.RuntimeTypes open LibExecution.Builtin.Shortcuts module PT = LibExecution.ProgramTypes -module VT = LibExecution.ValueType module Dval = LibExecution.Dval +module PackageRefs = LibExecution.PackageRefs +module NR = LibExecution.RuntimeTypes.NameResolution -/// The tuple shape a conflict crosses as: (id, location, itemKind, localHash, incomingHash, chosenHash, -/// resolvedBy, status). -let private conflictTupleKT = - KTTuple( - VT.string, - VT.string, - [ VT.string; VT.string; VT.string; VT.string; VT.string; VT.string ] - ) +let private conflictType () = + FQTypeName.fqPackage (PackageRefs.Type.Sync.Conflicts.conflict ()) -let private toTuple (c : LibDB.Conflicts.Conflict) : Dval = - DTuple( - DString c.id, - DString c.location, - [ DString c.itemKind - DString c.localHash - DString c.incomingHash - DString c.chosenHash - DString c.resolvedBy - DString c.status ] +let private toRecord (c : LibDB.Conflicts.Conflict) : Dval = + let t = conflictType () + DRecord( + t, + t, + [], + Map + [ "id", DString c.id + "location", DString c.location + "itemKind", DString c.itemKind + "localHash", DString c.localHash + "incomingHash", DString c.incomingHash + "chosenHash", DString c.chosenHash + "resolvedBy", DString c.resolvedBy + "status", DString c.status ] ) let fns () : List = [ { name = fn "conflictsList" 0 typeParams = [] parameters = [ Param.make "unit" TUnit "" ] - returnType = - TList( - TTuple( - TString, - TString, - [ TString; TString; TString; TString; TString; TString ] - ) - ) + returnType = TList(TCustomType(NR.ok (conflictType ()), [])) description = - "This instance's recorded sync conflicts as (id, location, itemKind, localHash, incomingHash, chosenHash, resolvedBy, status). Local-only review log." + "This instance's recorded sync conflicts, each as a `Darklang.Sync.Conflicts.Conflict`. Local-only review log." fn = (function | _, _, _, [ DUnit ] -> uply { let! conflicts = LibDB.Conflicts.list () - return conflicts |> List.map toTuple |> Dval.list conflictTupleKT + let kt = KTCustomType(conflictType (), []) + return conflicts |> List.map toRecord |> Dval.list kt } | _ -> incorrectArgs ()) sqlSpec = NotQueryable diff --git a/backend/src/LibExecution/PackageRefs.fs b/backend/src/LibExecution/PackageRefs.fs index ee0d9a437f..726f671824 100644 --- a/backend/src/LibExecution/PackageRefs.fs +++ b/backend/src/LibExecution/PackageRefs.fs @@ -107,6 +107,10 @@ module Type = let branchOpEvent = p [] "BranchOpEvent" let resolutionEvent = p [] "ResolutionEvent" + module Conflicts = + let private p addl = p ("Conflicts" :: addl) + let conflict = p [] "Conflict" + module Stdlib = let private p addl = p ("Stdlib" :: addl) diff --git a/packages/darklang/cli/conflicts.dark b/packages/darklang/cli/conflicts.dark index 196dff7335..9d7f351fe1 100644 --- a/packages/darklang/cli/conflicts.dark +++ b/packages/darklang/cli/conflicts.dark @@ -5,30 +5,8 @@ module Darklang.Cli.Conflicts // auto choice, or override it — an override mints a SYNCED Resolution that propagates so peers converge on // your pick. -type Conflict = - { id: String - location: String - itemKind: String - localHash: String - incomingHash: String - chosenHash: String - resolvedBy: String - status: String } - -let private conflicts () : List = - Stdlib.List.map (Builtin.conflictsList ()) (fun t -> - let (id, location, itemKind, localHash, incomingHash, chosenHash, resolvedBy, status) = - t - - Conflict - { id = id - location = location - itemKind = itemKind - localHash = localHash - incomingHash = incomingHash - chosenHash = chosenHash - resolvedBy = resolvedBy - status = status }) +let private conflicts () : List = + Builtin.conflictsList () // First 8 chars of a hash for compact display. let private short (h: String) : String = @@ -40,10 +18,12 @@ let private leafName (location: String) : String = | Some n -> n | None -> location -let private unreviewed () : List = +let private unreviewed () : List = Stdlib.List.filter (conflicts ()) (fun c -> c.status == "auto-resolved") -let private findOpen (location: String) : Stdlib.Option.Option = +let private findOpen + (location: String) + : Stdlib.Option.Option = Stdlib.List.findFirst (unreviewed ()) (fun c -> c.location == location) let private noneMsg (location: String) : String = diff --git a/packages/darklang/sync/conflicts.dark b/packages/darklang/sync/conflicts.dark new file mode 100644 index 0000000000..78bb2081f4 --- /dev/null +++ b/packages/darklang/sync/conflicts.dark @@ -0,0 +1,12 @@ +module Darklang.Sync.Conflicts + +// A recorded sync divergence, read by the `dark conflicts` UX. +type Conflict = + { id: String + location: String + itemKind: String + localHash: String + incomingHash: String + chosenHash: String + resolvedBy: String + status: String } From d30ff96d89f68d444588a9f67dda5ff31414ac65 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 00:17:46 -0400 Subject: [PATCH 048/172] builtins: trim the new registration section comments MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The combine-list is already well-grouped (DB/Sqlite/Sync/Conflicts/PM/Traces/ Accounts) — not a pile of one-offs, and the SCM builtins already live under Libs/PM/. Sync/Conflicts stay their own siblings (moving them under PM would conflate cross-instance sync with local package management). Just shorten the verbose Sqlite/Sync/Conflicts labels to match the house style. Co-Authored-By: Claude Opus 4.8 --- backend/src/Builtins/Builtins.Matter/Builtin.fs | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/backend/src/Builtins/Builtins.Matter/Builtin.fs b/backend/src/Builtins/Builtins.Matter/Builtin.fs index 61033fa93e..83f58ab1a2 100644 --- a/backend/src/Builtins/Builtins.Matter/Builtin.fs +++ b/backend/src/Builtins/Builtins.Matter/Builtin.fs @@ -15,13 +15,13 @@ let builtins (pm : PT.PackageManager) : Builtins = [ // DB Libs.DB.builtins () - // Sqlite (raw SQLite access — the Stdlib.Sqlite floor primitive spike) + // Sqlite (raw Stdlib.Sqlite access) Libs.Sqlite.builtins () - // Sync (internal: op-log read/append wire, blob channel, store path + Release coordinate) + // Sync (internal: op-log wire, blobs, store path + Release) Libs.Sync.builtins () - // Conflicts (dark conflicts — the sync Conflict/Resolution UX) + // Conflicts (dark conflicts UX) Libs.Conflicts.builtins () // PM (package manager — packages, branches, ops, merge, …) From 5f219f1c3d95568d39c9a1e1ba96c6ba534de719 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 00:21:28 -0400 Subject: [PATCH 049/172] libdb: crisper Lww business case MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Lww is correct and needed — distributed instances need one deterministic, instance-independent winner for a name, and sharing the rule across the op-fold / divergence detection / resolution overlay is what keeps them from diverging. Just tighten the doc to state that business case crisply; logic unchanged. Co-Authored-By: Claude Opus 4.8 --- backend/src/LibDB/Lww.fs | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/backend/src/LibDB/Lww.fs b/backend/src/LibDB/Lww.fs index 26d68a4fc8..aebe747363 100644 --- a/backend/src/LibDB/Lww.fs +++ b/backend/src/LibDB/Lww.fs @@ -1,14 +1,12 @@ /// The timestamp last-writer-wins staleness rule, in ONE place. /// -/// A candidate binding LOSES (is "stale") when its authoring stamp is older than the current binding's — or, -/// on an exact stamp tie, when its content hash is the lower of the two (a portable, instance-independent -/// tiebreak). The op-fold (`applySetName`), divergence detection (`Conflicts.detectDivergences`), and the -/// resolution overlay (`Resolutions.applyToLocations`) must ALL apply this identical rule; if any copy drifts, -/// two instances can pick different winners for the same name and silently diverge. Keeping it here makes that -/// impossible by construction. +/// Distributed instances editing the same name must pick the SAME winner without coordinating. A candidate +/// is stale (loses) when its authoring stamp is older, or — on an exact tie — when its content hash is the +/// lower of the two (a portable, instance-independent tiebreak). The op-fold, divergence detection +/// (`Conflicts`), and the resolution overlay (`Resolutions`) all apply this one rule; keeping it here means +/// no copy can drift and make two instances diverge. /// -/// Stamps are the portable `yyyy-MM-ddTHH:mm:ss.fffZ` strings; lexical `<` is chronological for that fixed -/// format, so no parsing is needed. +/// Stamps are `yyyy-MM-ddTHH:mm:ss.fffZ` strings, so lexical `<` is already chronological — no parsing. module LibDB.Lww /// True iff binding (newTs, newHash) loses to the live binding (curTs, curHash) under timestamp-LWW. From dd1054a08da4d254460efc447872c08b18725038 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 00:27:59 -0400 Subject: [PATCH 050/172] tests: split the multi-instance harness out of MultiInstance.Tests.fs MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The 1046-line file mixed a ~250-line in-process harness (fresh/seeded isolated stores, wire-event builders, projection inspectors, in-process CLI driver) with its test cases. Move the harness to MultiInstanceHarness.fs so the test file is just cases (809 lines) that read against a named harness. No behavior change — MultiInstance 18/18 green. Co-Authored-By: Claude Opus 4.8 --- backend/tests/Tests/MultiInstance.Tests.fs | 244 +----------------- backend/tests/Tests/MultiInstanceHarness.fs | 265 ++++++++++++++++++++ backend/tests/Tests/Tests.fsproj | 1 + 3 files changed, 269 insertions(+), 241 deletions(-) create mode 100644 backend/tests/Tests/MultiInstanceHarness.fs diff --git a/backend/tests/Tests/MultiInstance.Tests.fs b/backend/tests/Tests/MultiInstance.Tests.fs index c213d151b1..5a04ee92e1 100644 --- a/backend/tests/Tests/MultiInstance.Tests.fs +++ b/backend/tests/Tests/MultiInstance.Tests.fs @@ -1,17 +1,5 @@ -/// A tight, general-purpose harness for spinning up FRESH, ISOLATED Darklang instances in-process — each -/// instance is its own store. Two flavours: -/// freshInstance — an empty store (schema only; `main` from schema.sql). For structure-level tests. -/// seededInstance — a COPY of a ready-to-go baseline store (the full package seed), so a test that needs -/// real functions/types/values (most CLI experiences) is cheap: the baseline is snapshotted -/// once, then each instance is a fast file-copy of it. -/// Switch the active store with `activate`, sync the wire between instances via the real receive path, and -/// assert they converge. Spinning up an instance is a couple of lines: -/// let! a = seededInstance "a" -/// let! b = seededInstance "b" -/// -/// `testSequenced` + a `finally` that always restores the default store, so swapping the process-global -/// connection can't disturb the parallel store tests (they've completed by the sequenced phase; and we hand -/// the default store back no matter what). The swap lives behind `Sql.useStoreForTesting` (test-only). +/// Multi-instance sync tests: spin up isolated in-process stores, sync the wire between them via the +/// real receive path, and assert they converge. The harness lives in `MultiInstanceHarness.fs`. module Tests.MultiInstance open Expecto @@ -37,233 +25,7 @@ module PT2RT = LibExecution.ProgramTypesToRuntimeTypes module Exe = LibExecution.Execution module Dval = LibExecution.Dval -// ── the fresh-instance harness ────────────────────────────────────────────────────────────────────── - -type Instance = { name : string; path : string } - -let private schemaSql = lazy (File.readfile Config.Migrations "schema.sql") - -let private deleteStore (path : string) : unit = - for suffix in [ ""; "-wal"; "-shm" ] do - try - System.IO.File.Delete(path + suffix) - with _ -> - () - -/// Copy a SQLite store + its WAL/SHM sidecars (so the copy is a consistent snapshot on open). -let private copyStore (src : string) (dst : string) : unit = - deleteStore dst - for suffix in [ ""; "-wal"; "-shm" ] do - if System.IO.File.Exists(src + suffix) then - System.IO.File.Copy(src + suffix, dst + suffix, overwrite = true) - -let private tmpPath (name : string) : string = - $"/tmp/dark-test-instance-{name}-{System.Guid.NewGuid()}.db" - -/// Snapshotted ONCE: a baseline of the seeded default store, so `seededInstance` is a cheap local copy. -/// Captured lazily during the sequenced phase, when no parallel test is writing the default store. -let private baselineSeed : Lazy = - lazy - (let template = "/tmp/dark-test-seed-baseline.db" - copyStore LibConfig.Config.dbPath template - template) - -/// A fresh, EMPTY, isolated instance (schema only; `main` from schema.sql), made the active store. -let freshInstance (name : string) : Task = - task { - let path = tmpPath name - deleteStore path - Sql.useStoreForTesting path - Sql.query (schemaSql.Force()) |> Sql.executeStatementSync - return { name = name; path = path } - } - -/// A fresh isolated instance that is a COPY of the seeded baseline (full package seed), made the active store. -let seededInstance (name : string) : Task = - task { - let path = tmpPath name - copyStore (baselineSeed.Force()) path - Sql.useStoreForTesting path - return { name = name; path = path } - } - -let activate (inst : Instance) : unit = Sql.useStoreForTesting inst.path - -let teardown (insts : List) : unit = - Sql.resetStoreForTesting () - insts |> List.iter (fun i -> deleteStore i.path) - -// ── helpers (build wire events, inspect projections, convert the JSON-ish wire) ─────────────────────── - -let private branchEventAt - (op : PT.BranchOp) - (originTs : string) - : string * byte[] * string = - let (PT.Hash h) = Hashing.computeBranchOpHash op - (h, BS.PT.BranchOp.serialize h op, originTs) - -let private branchEvent (op : PT.BranchOp) : string * byte[] * string = - branchEventAt op "2026-07-08T00:00:00.000Z" - -/// A SetName package-op event, exactly as it crosses the wire / arrives at `receiveOps`. -let private setNameEvent - (loc : PT.PackageLocation) - (fnHash : string) - (commitHash : string) - (ts : string) - : System.Guid * byte[] * System.Guid * string * string = - let op = PT.PackageOp.SetName(loc, PT.Reference.PackageFn(PT.Hash fnHash)) - let opId = Inserts.computeOpHash op - (opId, BS.PT.PackageOp.serialize opId op, PT.mainBranchId, commitHash, ts) - -/// A Deprecate package-op event marking a real seeded fn Obsolete — as it crosses the wire / arrives at -/// `receiveOps`. Folds into the `deprecations` projection (a non-SetName op kind). -let private deprecateEvent - (fnHash : string) - (commitHash : string) - (ts : string) - : System.Guid * byte[] * System.Guid * string * string = - let target = PT.Reference.fromHashAndKind (PT.Hash fnHash, PT.ItemKind.Fn) - let op = - PT.PackageOp.Deprecate(target, PT.DeprecationKind.Obsolete, "obsolete (test)") - let opId = Inserts.computeOpHash op - (opId, BS.PT.PackageOp.serialize opId op, PT.mainBranchId, commitHash, ts) - -/// A seeded function hash that is NOT already deprecated — so a deprecation test starts from a clean slate. -let private undeprecatedFunctionHash () : Task = - Sql.query - "SELECT hash FROM package_functions WHERE hash NOT IN (SELECT item_hash FROM deprecations) LIMIT 1" - |> Sql.executeRowAsync (fun read -> read.string "hash") - -/// An existing commit hash from the seed. Sync ops reference commits that already exist (commits travel in the -/// wire alongside their ops), so a test references a real seed commit rather than minting accounts + commits. -let private existingCommit () : Task = - Sql.query "SELECT hash FROM commits LIMIT 1" - |> Sql.executeRowAsync (fun read -> read.string "hash") - -/// The active instance's branch-op-log high-water mark (so a `branchOpsSince` returns only NEW branch ops). -let private currentBranchCursor () : Task = - Sql.query "SELECT COALESCE(MAX(rowid), 0) AS c FROM branch_ops" - |> Sql.executeRowAsync (fun read -> read.int64 "c") - -let private branchNames () : Task> = - Sql.query "SELECT name FROM branches ORDER BY name" - |> Sql.executeAsync (fun read -> read.string "name") - -let private liveHash (loc : PT.PackageLocation) : Task> = - Sql.query - "SELECT item_hash FROM locations WHERE owner = @o AND modules = @m AND name = @n AND unlisted_at IS NULL" - |> Sql.parameters - [ "o", Sql.string loc.owner - "m", Sql.string (String.concat "." loc.modules) - "n", Sql.string loc.name ] - |> Sql.executeAsync (fun read -> read.string "item_hash") - -/// Two distinct real function hashes from the seed (both instances share the seed, so a hash on A exists on B). -let private twoFunctionHashes () : Task = - task { - let! hs = - Sql.query "SELECT hash FROM package_functions LIMIT 2" - |> Sql.executeAsync (fun read -> read.string "hash") - match hs with - | a :: b :: _ -> return (a, b) - | _ -> return Exception.raiseInternal "seed needs >= 2 functions" [] - } - -/// The active instance's current op-log high-water mark, so a later `eventsSince` returns only NEW ops -/// (not the whole seed). -let private currentCursor () : Task = - Sql.query "SELECT COALESCE(MAX(rowid), 0) AS c FROM package_ops" - |> Sql.executeRowAsync (fun read -> read.int64 "c") - -/// The count of unreviewed conflicts recorded on the active instance. -let private conflictCount () : Task = - Sql.query "SELECT COUNT(*) AS n FROM sync_conflicts" - |> Sql.executeRowAsync (fun read -> read.int64 "n") - -/// Conflicts recorded for ONE location — so a test asserts on its OWN divergence (an exact count), not a -/// global tally that any baseline/other-test conflict would satisfy. -let private conflictCountAt (location : string) : Task = - Sql.query "SELECT COUNT(*) AS n FROM sync_conflicts WHERE location = @loc" - |> Sql.parameters [ "loc", Sql.string location ] - |> Sql.executeRowAsync (fun read -> read.int64 "n") - -let private wireEvent - ((id, hex, br, ch, ts) : string * string * string * string * string) - : System.Guid * byte[] * System.Guid * string * string = - (System.Guid.Parse id, - System.Convert.FromHexString hex, - System.Guid.Parse br, - ch, - ts) - -let private wireCommit - ((h, msg, br, acct, at) : string * string * string * string * string) - : string * string * System.Guid * System.Guid * string = - (h, msg, System.Guid.Parse br, System.Guid.Parse acct, at) - -/// Read the active instance's NEW package ops since `cursor` as a wire batch, ready to feed another -/// instance's `receiveOps` (this is the real serialize→wire→deserialize round-trip sync does). -let private wireSince - (cursor : int64) - : Task * - List> - = - task { - let! (commitsW, eventsW, _) = Seed.eventsSince cursor 100000L - return (List.map wireCommit commitsW, List.map wireEvent eventsW) - } - -// ── tests ───────────────────────────────────────────────────────────────────────────────────────────── - -// ── in-process CLI driver ───────────────────────────────────────────────────────────────────────────── -// Drive the REAL `dark ` dispatch (the `executeCliCommand` package fn) in-process against whatever -// store is currently active, capturing its stdout. This is the same seam `CliTraces.Tests.fs` uses — no -// subprocess fork, so it's fast enough for the normal suite, yet it exercises the true CLI code path -// (dispatch, rendering, Builtins) end to end. Combined with `seededInstance`/`activate`, a test can build a -// real store state (e.g. a recorded conflict) and assert on what the user would actually see. - -let private buildCliState () : Task = - task { - let builtins = Builtins.CliHost.Libs.Cli.builtinsToUse () - let pmRT = PT2RT.PackageManager.toRT builtins.values LibDB.PackageManager.pt - let program : RT.Program = { dbs = Map.empty } - let notify _ _ _ _ = uply { return () } - let sendException _ _ _ _ = uply { return () } - return - Exe.createState - builtins - pmRT - Exe.noTracing - sendException - notify - PT.mainBranchId - program - } - -/// Invoke `dark ` in-process against the active store; return trimmed stdout. Redirects `Console.Out` -/// for the duration (the surrounding `testSequenced` keeps the process-global `SetOut` from racing). -let private runCli (state : RT.ExecutionState) (args : string list) : Task = - task { - let argsDval = args |> List.map RT.DString |> Dval.list RT.KTString - let fnName = - RT.FQFnName.fqPackage (LibExecution.PackageRefs.Fn.Cli.executeCliCommand ()) - NonBlockingConsole.wait () - let captured = new System.IO.StringWriter() - let originalOut = System.Console.Out - try - System.Console.SetOut(captured) - let! result = Exe.executeFunction state fnName [] (NEList.singleton argsDval) - // `Stdlib.printLine` queues to a background thread; drain before reading. - NonBlockingConsole.wait () - match result with - | Ok _ -> return captured.ToString().Trim() - | Error(rte, _) -> - System.Console.SetOut(originalOut) - return Tests.failtestf "runCli %A errored: %A" args rte - finally - System.Console.SetOut(originalOut) - } +open Tests.MultiInstanceHarness let tests = testSequenced diff --git a/backend/tests/Tests/MultiInstanceHarness.fs b/backend/tests/Tests/MultiInstanceHarness.fs new file mode 100644 index 0000000000..f3cab38f05 --- /dev/null +++ b/backend/tests/Tests/MultiInstanceHarness.fs @@ -0,0 +1,265 @@ +/// A tight, general-purpose harness for spinning up FRESH, ISOLATED Darklang instances in-process — each +/// instance is its own store. Two flavours: +/// freshInstance — an empty store (schema only; `main` from schema.sql). For structure-level tests. +/// seededInstance — a COPY of a ready-to-go baseline store (the full package seed), so a test that needs +/// real functions/types/values (most CLI experiences) is cheap: the baseline is snapshotted +/// once, then each instance is a fast file-copy of it. +/// Switch the active store with `activate`, sync the wire between instances via the real receive path, and +/// assert they converge. Spinning up an instance is a couple of lines: +/// let! a = seededInstance "a" +/// let! b = seededInstance "b" +/// +/// `testSequenced` + a `finally` that always restores the default store, so swapping the process-global +/// connection can't disturb the parallel store tests (they've completed by the sequenced phase; and we hand +/// the default store back no matter what). The swap lives behind `Sql.useStoreForTesting` (test-only). +module Tests.MultiInstanceHarness + +open Expecto + +open System.Threading.Tasks +open FSharp.Control.Tasks + +open Prelude +open Fumble +open LibDB.Sqlite + +module Seed = LibDB.Seed +module Inserts = LibDB.Inserts +module Resolutions = LibDB.Resolutions +module Account = LibCloud.Account +module PT = LibExecution.ProgramTypes +module BS = LibSerialization.Binary.Serialization +module Hashing = LibSerialization.Hashing.Hashing +module File = LibCloud.File +module Config = LibCloud.Config +module RT = LibExecution.RuntimeTypes +module PT2RT = LibExecution.ProgramTypesToRuntimeTypes +module Exe = LibExecution.Execution +module Dval = LibExecution.Dval + +// ── the fresh-instance harness ────────────────────────────────────────────────────────────────────── + +type Instance = { name : string; path : string } + +let schemaSql = lazy (File.readfile Config.Migrations "schema.sql") + +let deleteStore (path : string) : unit = + for suffix in [ ""; "-wal"; "-shm" ] do + try + System.IO.File.Delete(path + suffix) + with _ -> + () + +/// Copy a SQLite store + its WAL/SHM sidecars (so the copy is a consistent snapshot on open). +let copyStore (src : string) (dst : string) : unit = + deleteStore dst + for suffix in [ ""; "-wal"; "-shm" ] do + if System.IO.File.Exists(src + suffix) then + System.IO.File.Copy(src + suffix, dst + suffix, overwrite = true) + +let tmpPath (name : string) : string = + $"/tmp/dark-test-instance-{name}-{System.Guid.NewGuid()}.db" + +/// Snapshotted ONCE: a baseline of the seeded default store, so `seededInstance` is a cheap local copy. +/// Captured lazily during the sequenced phase, when no parallel test is writing the default store. +let baselineSeed : Lazy = + lazy + (let template = "/tmp/dark-test-seed-baseline.db" + copyStore LibConfig.Config.dbPath template + template) + +/// A fresh, EMPTY, isolated instance (schema only; `main` from schema.sql), made the active store. +let freshInstance (name : string) : Task = + task { + let path = tmpPath name + deleteStore path + Sql.useStoreForTesting path + Sql.query (schemaSql.Force()) |> Sql.executeStatementSync + return { name = name; path = path } + } + +/// A fresh isolated instance that is a COPY of the seeded baseline (full package seed), made the active store. +let seededInstance (name : string) : Task = + task { + let path = tmpPath name + copyStore (baselineSeed.Force()) path + Sql.useStoreForTesting path + return { name = name; path = path } + } + +let activate (inst : Instance) : unit = Sql.useStoreForTesting inst.path + +let teardown (insts : List) : unit = + Sql.resetStoreForTesting () + insts |> List.iter (fun i -> deleteStore i.path) + +// ── helpers (build wire events, inspect projections, convert the JSON-ish wire) ─────────────────────── + +let branchEventAt + (op : PT.BranchOp) + (originTs : string) + : string * byte[] * string = + let (PT.Hash h) = Hashing.computeBranchOpHash op + (h, BS.PT.BranchOp.serialize h op, originTs) + +let branchEvent (op : PT.BranchOp) : string * byte[] * string = + branchEventAt op "2026-07-08T00:00:00.000Z" + +/// A SetName package-op event, exactly as it crosses the wire / arrives at `receiveOps`. +let setNameEvent + (loc : PT.PackageLocation) + (fnHash : string) + (commitHash : string) + (ts : string) + : System.Guid * byte[] * System.Guid * string * string = + let op = PT.PackageOp.SetName(loc, PT.Reference.PackageFn(PT.Hash fnHash)) + let opId = Inserts.computeOpHash op + (opId, BS.PT.PackageOp.serialize opId op, PT.mainBranchId, commitHash, ts) + +/// A Deprecate package-op event marking a real seeded fn Obsolete — as it crosses the wire / arrives at +/// `receiveOps`. Folds into the `deprecations` projection (a non-SetName op kind). +let deprecateEvent + (fnHash : string) + (commitHash : string) + (ts : string) + : System.Guid * byte[] * System.Guid * string * string = + let target = PT.Reference.fromHashAndKind (PT.Hash fnHash, PT.ItemKind.Fn) + let op = + PT.PackageOp.Deprecate(target, PT.DeprecationKind.Obsolete, "obsolete (test)") + let opId = Inserts.computeOpHash op + (opId, BS.PT.PackageOp.serialize opId op, PT.mainBranchId, commitHash, ts) + +/// A seeded function hash that is NOT already deprecated — so a deprecation test starts from a clean slate. +let undeprecatedFunctionHash () : Task = + Sql.query + "SELECT hash FROM package_functions WHERE hash NOT IN (SELECT item_hash FROM deprecations) LIMIT 1" + |> Sql.executeRowAsync (fun read -> read.string "hash") + +/// An existing commit hash from the seed. Sync ops reference commits that already exist (commits travel in the +/// wire alongside their ops), so a test references a real seed commit rather than minting accounts + commits. +let existingCommit () : Task = + Sql.query "SELECT hash FROM commits LIMIT 1" + |> Sql.executeRowAsync (fun read -> read.string "hash") + +/// The active instance's branch-op-log high-water mark (so a `branchOpsSince` returns only NEW branch ops). +let currentBranchCursor () : Task = + Sql.query "SELECT COALESCE(MAX(rowid), 0) AS c FROM branch_ops" + |> Sql.executeRowAsync (fun read -> read.int64 "c") + +let branchNames () : Task> = + Sql.query "SELECT name FROM branches ORDER BY name" + |> Sql.executeAsync (fun read -> read.string "name") + +let liveHash (loc : PT.PackageLocation) : Task> = + Sql.query + "SELECT item_hash FROM locations WHERE owner = @o AND modules = @m AND name = @n AND unlisted_at IS NULL" + |> Sql.parameters + [ "o", Sql.string loc.owner + "m", Sql.string (String.concat "." loc.modules) + "n", Sql.string loc.name ] + |> Sql.executeAsync (fun read -> read.string "item_hash") + +/// Two distinct real function hashes from the seed (both instances share the seed, so a hash on A exists on B). +let twoFunctionHashes () : Task = + task { + let! hs = + Sql.query "SELECT hash FROM package_functions LIMIT 2" + |> Sql.executeAsync (fun read -> read.string "hash") + match hs with + | a :: b :: _ -> return (a, b) + | _ -> return Exception.raiseInternal "seed needs >= 2 functions" [] + } + +/// The active instance's current op-log high-water mark, so a later `eventsSince` returns only NEW ops +/// (not the whole seed). +let currentCursor () : Task = + Sql.query "SELECT COALESCE(MAX(rowid), 0) AS c FROM package_ops" + |> Sql.executeRowAsync (fun read -> read.int64 "c") + +/// The count of unreviewed conflicts recorded on the active instance. +let conflictCount () : Task = + Sql.query "SELECT COUNT(*) AS n FROM sync_conflicts" + |> Sql.executeRowAsync (fun read -> read.int64 "n") + +/// Conflicts recorded for ONE location — so a test asserts on its OWN divergence (an exact count), not a +/// global tally that any baseline/other-test conflict would satisfy. +let conflictCountAt (location : string) : Task = + Sql.query "SELECT COUNT(*) AS n FROM sync_conflicts WHERE location = @loc" + |> Sql.parameters [ "loc", Sql.string location ] + |> Sql.executeRowAsync (fun read -> read.int64 "n") + +let wireEvent + ((id, hex, br, ch, ts) : string * string * string * string * string) + : System.Guid * byte[] * System.Guid * string * string = + (System.Guid.Parse id, + System.Convert.FromHexString hex, + System.Guid.Parse br, + ch, + ts) + +let wireCommit + ((h, msg, br, acct, at) : string * string * string * string * string) + : string * string * System.Guid * System.Guid * string = + (h, msg, System.Guid.Parse br, System.Guid.Parse acct, at) + +/// Read the active instance's NEW package ops since `cursor` as a wire batch, ready to feed another +/// instance's `receiveOps` (this is the real serialize→wire→deserialize round-trip sync does). +let wireSince + (cursor : int64) + : Task * + List> + = + task { + let! (commitsW, eventsW, _) = Seed.eventsSince cursor 100000L + return (List.map wireCommit commitsW, List.map wireEvent eventsW) + } + + +// ── in-process CLI driver ───────────────────────────────────────────────────────────────────────────── +// Drive the REAL `dark ` dispatch (the `executeCliCommand` package fn) in-process against whatever +// store is currently active, capturing its stdout. This is the same seam `CliTraces.Tests.fs` uses — no +// subprocess fork, so it's fast enough for the normal suite, yet it exercises the true CLI code path +// (dispatch, rendering, Builtins) end to end. Combined with `seededInstance`/`activate`, a test can build a +// real store state (e.g. a recorded conflict) and assert on what the user would actually see. + +let buildCliState () : Task = + task { + let builtins = Builtins.CliHost.Libs.Cli.builtinsToUse () + let pmRT = PT2RT.PackageManager.toRT builtins.values LibDB.PackageManager.pt + let program : RT.Program = { dbs = Map.empty } + let notify _ _ _ _ = uply { return () } + let sendException _ _ _ _ = uply { return () } + return + Exe.createState + builtins + pmRT + Exe.noTracing + sendException + notify + PT.mainBranchId + program + } + +/// Invoke `dark ` in-process against the active store; return trimmed stdout. Redirects `Console.Out` +/// for the duration (the surrounding `testSequenced` keeps the process-global `SetOut` from racing). +let runCli (state : RT.ExecutionState) (args : string list) : Task = + task { + let argsDval = args |> List.map RT.DString |> Dval.list RT.KTString + let fnName = + RT.FQFnName.fqPackage (LibExecution.PackageRefs.Fn.Cli.executeCliCommand ()) + NonBlockingConsole.wait () + let captured = new System.IO.StringWriter() + let originalOut = System.Console.Out + try + System.Console.SetOut(captured) + let! result = Exe.executeFunction state fnName [] (NEList.singleton argsDval) + // `Stdlib.printLine` queues to a background thread; drain before reading. + NonBlockingConsole.wait () + match result with + | Ok _ -> return captured.ToString().Trim() + | Error(rte, _) -> + System.Console.SetOut(originalOut) + return Tests.failtestf "runCli %A errored: %A" args rte + finally + System.Console.SetOut(originalOut) + } diff --git a/backend/tests/Tests/Tests.fsproj b/backend/tests/Tests/Tests.fsproj index 6c31f0ec15..6dc75ae55c 100644 --- a/backend/tests/Tests/Tests.fsproj +++ b/backend/tests/Tests/Tests.fsproj @@ -54,6 +54,7 @@ + From b99687fd0d3ba30b3b3a1e23223ac55099d96c9a Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 00:30:52 -0400 Subject: [PATCH 051/172] tests: name the three sync-test layers in SyncScenarios' doc MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit SyncE2E already delineates itself from MultiInstance (real HTTP vs in-process). Add the missing orientation to SyncScenarios so the three layers are explicit: fold order-independence (this file) / two real stores over the in-process wire (MultiInstance) / real processes over HTTP (SyncE2E). Each catches a distinct failure mode — they're a pyramid, not duplicates. Co-Authored-By: Claude Opus 4.8 --- backend/tests/Tests/SyncScenarios.Tests.fs | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/backend/tests/Tests/SyncScenarios.Tests.fs b/backend/tests/Tests/SyncScenarios.Tests.fs index 33506fc87d..55f28cd97c 100644 --- a/backend/tests/Tests/SyncScenarios.Tests.fs +++ b/backend/tests/Tests/SyncScenarios.Tests.fs @@ -6,6 +6,10 @@ /// tests here apply an op multiset in different orders and assert an identical `locations` outcome — that /// order-independence IS the two-instance convergence guarantee. testSequenced + self-cleanup so these ride /// the shared store safely (they only ever touch their own `Test.*` names/branches). +/// +/// The lightest of three sync-test layers: this proves the fold is order-independent (one store, op-set +/// replay); `MultiInstance` runs two real isolated stores over the in-process wire; `SyncE2E` runs real +/// processes over HTTP. module Tests.SyncScenarios open Expecto From d7a0dc98e8d37a7bfaf5993f3eecf5f627f2bdd0 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 00:44:53 -0400 Subject: [PATCH 052/172] tests: fold AlphaNormalize tests into Hashing, drop the branding MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Alpha-normalization is just how meaning-stable hashing works — it doesn't warrant its own test module + "AlphaNormalize" branding. Move the 10 tests into Hashing.Tests.fs as a "meaning-stable (alpha-normalization)" sub-list and delete AlphaNormalize.Tests.fs. Hashing 39/39 green. Co-Authored-By: Claude Opus 4.8 --- backend/tests/Tests/AlphaNormalize.Tests.fs | 152 -------------------- backend/tests/Tests/Hashing.Tests.fs | 136 +++++++++++++++++- backend/tests/Tests/Tests.fs | 3 +- backend/tests/Tests/Tests.fsproj | 1 - 4 files changed, 136 insertions(+), 156 deletions(-) delete mode 100644 backend/tests/Tests/AlphaNormalize.Tests.fs diff --git a/backend/tests/Tests/AlphaNormalize.Tests.fs b/backend/tests/Tests/AlphaNormalize.Tests.fs deleted file mode 100644 index bf8e581ad5..0000000000 --- a/backend/tests/Tests/AlphaNormalize.Tests.fs +++ /dev/null @@ -1,152 +0,0 @@ -/// Proves meaning-stable hashing: after alpha-normalization, a package item's content hash depends on -/// its MEANING, not on incidental bound-variable names. Two items identical up to renaming of -/// parameters / `let` / lambda / match binders hash IDENTICALLY; items that differ in meaning (which -/// variable is used, binder order, a free variable) still hash DIFFERENTLY. -/// -/// Everything is compared through `computeFnHash` (which skips ids), since two freshly-built exprs have -/// different ids and so can't be compared structurally with `=`. -module Tests.AlphaNormalize - -open Expecto -open Prelude - -open TestUtils.TestUtils -open TestUtils.PTShortcuts - -module PT = LibExecution.ProgramTypes -open LibSerialization.Hashing - - - -// ── helpers: a fn with the given parameter names + body; its raw vs alpha-normalized hash ── - -let private fnOf - (paramNames : List) - (body : PT.Expr) - : PT.PackageFn.PackageFn = - let ps = - match paramNames with - | [] -> NEList.singleton "unused" - | h :: t -> NEList.ofList h t - testPackageFn [] ps PT.TInt64 body - -// the LIVE content hash — `computeFnHash` alpha-normalizes internally, so this *is* the -// meaning-stable hash. (`normalizeFn` stays public + idempotent; the last test pins that directly.) -let private h (paramNames : List) (body : PT.Expr) : PT.Hash = - Hashing.computeFnHash Hashing.Normal (fnOf paramNames body) - -let private mpVar (name : string) : PT.MatchPattern = PT.MPVariable(gid (), name) - -let private caseOf (pat : PT.MatchPattern) (rhs : PT.Expr) : PT.MatchCase = - { pat = pat; whenCondition = None; rhs = rhs } - - -let tests = - testList - "AlphaNormalize" - [ test - "parameter names don't affect the hash (a parameter use is positional, EArg)" { - // the body references parameters by position (EArg index), and the parameter name isn't hashed, - // so two fns identical up to parameter names share one content hash. (Meaning-preservation — - // which parameter goes where — is pinned by the next test and the let/lambda/match tests below.) - let body = eTuple (eArg 0) (eArg 1) [] // (param0, param1) — positional - Expect.equal - (h [ "x"; "y" ] body) - (h [ "a"; "b" ] body) - "same meaning, same hash — the function's identity ignores incidental parameter names" - } - - test "parameter POSITION is meaning: `(arg0, arg1)` ≠ `(arg1, arg0)`" { - Expect.notEqual - (h [ "x"; "y" ] (eTuple (eArg 0) (eArg 1) [])) - (h [ "x"; "y" ] (eTuple (eArg 1) (eArg 0) [])) - "which parameter goes where is meaning — the positional reference keeps it" - } - - test "let binder rename: `let x = 1 in x` ≡ `let y = 1 in y`" { - let lx = eLet (lpVar "x") (eInt64 1L) (eVar "x") - let ly = eLet (lpVar "y") (eInt64 1L) (eVar "y") - Expect.equal (h [] lx) (h [] ly) "same meaning, same hash" - } - - test "lambda binder rename: `fun x -> x` ≡ `fun y -> y`" { - let lx = eLambda (gid ()) [ lpVar "x" ] (eVar "x") - let ly = eLambda (gid ()) [ lpVar "y" ] (eVar "y") - Expect.equal (h [] lx) (h [] ly) "alpha-equivalent lambdas hash equal" - } - - test "lambda meaning preserved: `fun x y -> x` ≠ `fun x y -> y`" { - let first = eLambda (gid ()) [ lpVar "x"; lpVar "y" ] (eVar "x") - let second = eLambda (gid ()) [ lpVar "x"; lpVar "y" ] (eVar "y") - Expect.notEqual - (h [] first) - (h [] second) - "returning the first vs the second argument is a real difference" - } - - test "match binder rename: `match 0 with | x -> x` ≡ `| y -> y`" { - let mx = eMatch (eInt64 0L) [ caseOf (mpVar "x") (eVar "x") ] - let my = eMatch (eInt64 0L) [ caseOf (mpVar "y") (eVar "y") ] - Expect.equal (h [] mx) (h [] my) "alpha-equivalent match cases hash equal" - } - - test "match binder position matters: `| (x,y) -> x` ≢ `| (x,y) -> y`" { - // guards that multi-binder normalization keeps WHICH bound var the rhs uses — not just that it - // renames binders. Both patterns bind the same two names; only the rhs's choice differs. - let tuplePat = PT.MPTuple(gid (), mpVar "x", mpVar "y", []) - let mFirst = eMatch (eInt64 0L) [ caseOf tuplePat (eVar "x") ] - let mSecond = eMatch (eInt64 0L) [ caseOf tuplePat (eVar "y") ] - Expect.notEqual - (h [] mFirst) - (h [] mSecond) - "which tuple-bound variable the rhs returns is a real difference" - } - - test - "free variables are preserved (a free var is a real reference, not a binder)" { - // `z` / `w` are neither parameters nor locally bound — they must survive normalization distinctly - Expect.notEqual - (h [] (eVar "z")) - (h [] (eVar "w")) - "two different free variables stay different after normalization" - } - - test "shadowing: inner-use ≢ outer-use; and inner-use is alpha-stable" { - // let _ = 1 in let _ = 2 in - let useInnerXY = - eLet (lpVar "x") (eInt64 1L) (eLet (lpVar "y") (eInt64 2L) (eVar "y")) - let useInnerAB = - eLet (lpVar "a") (eInt64 1L) (eLet (lpVar "b") (eInt64 2L) (eVar "b")) - let useOuter = - eLet (lpVar "a") (eInt64 1L) (eLet (lpVar "b") (eInt64 2L) (eVar "a")) - Expect.equal - (h [] useInnerXY) - (h [] useInnerAB) - "using the inner binding is alpha-stable across renames" - Expect.notEqual - (h [] useInnerAB) - (h [] useOuter) - "using the inner vs the outer binding is a real difference (shadowing respected)" - } - - test - "normalization is idempotent (re-normalizing an already-normalized expr is a structural no-op)" { - // Compare the normalized EXPR structures directly (not through computeFnHash, which normalizes - // internally — that would re-normalize both sides and hide a first-pass difference). normalizeExpr - // preserves ids and only renames binders, so a second pass over the canonical form must be identity. - // Use real binders (let + lambda + a shadowing inner let) so there is something to normalize. - let body = - eLet - (lpVar "outer") - (eInt64 1L) - (eLambda - (gid ()) - [ lpVar "p" ] - (eLet (lpVar "inner") (eVar "p") (eVar "inner"))) - let once = Hashing.normalizeExpr body - let twice = Hashing.normalizeExpr once - Expect.equal - twice - once - "normalizeExpr (normalizeExpr e) is structurally identical to normalizeExpr e" - } ] diff --git a/backend/tests/Tests/Hashing.Tests.fs b/backend/tests/Tests/Hashing.Tests.fs index 4b595c0779..9b0d882489 100644 --- a/backend/tests/Tests/Hashing.Tests.fs +++ b/backend/tests/Tests/Hashing.Tests.fs @@ -29,6 +29,139 @@ let private makeValue (body : PT.Expr) : PT.PackageValue.PackageValue = // ── Tests ──────────────────────────────────────────────────────────────── +// ── meaning-stable hashing: bound-variable names don't affect the hash (alpha-normalization) ── + +let private fnOf + (paramNames : List) + (body : PT.Expr) + : PT.PackageFn.PackageFn = + let ps = + match paramNames with + | [] -> NEList.singleton "unused" + | h :: t -> NEList.ofList h t + testPackageFn [] ps PT.TInt64 body + +// the LIVE content hash — `computeFnHash` alpha-normalizes internally, so this *is* the +// meaning-stable hash. (`normalizeFn` stays public + idempotent; the last test pins that directly.) +let private h (paramNames : List) (body : PT.Expr) : PT.Hash = + Hashing.computeFnHash Hashing.Normal (fnOf paramNames body) + +let private mpVar (name : string) : PT.MatchPattern = PT.MPVariable(gid (), name) + +let private caseOf (pat : PT.MatchPattern) (rhs : PT.Expr) : PT.MatchCase = + { pat = pat; whenCondition = None; rhs = rhs } + +let private alphaNormTests = + testList + "meaning-stable (alpha-normalization)" + [ test + "parameter names don't affect the hash (a parameter use is positional, EArg)" { + // the body references parameters by position (EArg index), and the parameter name isn't hashed, + // so two fns identical up to parameter names share one content hash. (Meaning-preservation — + // which parameter goes where — is pinned by the next test and the let/lambda/match tests below.) + let body = eTuple (eArg 0) (eArg 1) [] // (param0, param1) — positional + Expect.equal + (h [ "x"; "y" ] body) + (h [ "a"; "b" ] body) + "same meaning, same hash — the function's identity ignores incidental parameter names" + } + + test "parameter POSITION is meaning: `(arg0, arg1)` ≠ `(arg1, arg0)`" { + Expect.notEqual + (h [ "x"; "y" ] (eTuple (eArg 0) (eArg 1) [])) + (h [ "x"; "y" ] (eTuple (eArg 1) (eArg 0) [])) + "which parameter goes where is meaning — the positional reference keeps it" + } + + test "let binder rename: `let x = 1 in x` ≡ `let y = 1 in y`" { + let lx = eLet (lpVar "x") (eInt64 1L) (eVar "x") + let ly = eLet (lpVar "y") (eInt64 1L) (eVar "y") + Expect.equal (h [] lx) (h [] ly) "same meaning, same hash" + } + + test "lambda binder rename: `fun x -> x` ≡ `fun y -> y`" { + let lx = eLambda (gid ()) [ lpVar "x" ] (eVar "x") + let ly = eLambda (gid ()) [ lpVar "y" ] (eVar "y") + Expect.equal (h [] lx) (h [] ly) "alpha-equivalent lambdas hash equal" + } + + test "lambda meaning preserved: `fun x y -> x` ≠ `fun x y -> y`" { + let first = eLambda (gid ()) [ lpVar "x"; lpVar "y" ] (eVar "x") + let second = eLambda (gid ()) [ lpVar "x"; lpVar "y" ] (eVar "y") + Expect.notEqual + (h [] first) + (h [] second) + "returning the first vs the second argument is a real difference" + } + + test "match binder rename: `match 0 with | x -> x` ≡ `| y -> y`" { + let mx = eMatch (eInt64 0L) [ caseOf (mpVar "x") (eVar "x") ] + let my = eMatch (eInt64 0L) [ caseOf (mpVar "y") (eVar "y") ] + Expect.equal (h [] mx) (h [] my) "alpha-equivalent match cases hash equal" + } + + test "match binder position matters: `| (x,y) -> x` ≢ `| (x,y) -> y`" { + // guards that multi-binder normalization keeps WHICH bound var the rhs uses — not just that it + // renames binders. Both patterns bind the same two names; only the rhs's choice differs. + let tuplePat = PT.MPTuple(gid (), mpVar "x", mpVar "y", []) + let mFirst = eMatch (eInt64 0L) [ caseOf tuplePat (eVar "x") ] + let mSecond = eMatch (eInt64 0L) [ caseOf tuplePat (eVar "y") ] + Expect.notEqual + (h [] mFirst) + (h [] mSecond) + "which tuple-bound variable the rhs returns is a real difference" + } + + test + "free variables are preserved (a free var is a real reference, not a binder)" { + // `z` / `w` are neither parameters nor locally bound — they must survive normalization distinctly + Expect.notEqual + (h [] (eVar "z")) + (h [] (eVar "w")) + "two different free variables stay different after normalization" + } + + test "shadowing: inner-use ≢ outer-use; and inner-use is alpha-stable" { + // let _ = 1 in let _ = 2 in + let useInnerXY = + eLet (lpVar "x") (eInt64 1L) (eLet (lpVar "y") (eInt64 2L) (eVar "y")) + let useInnerAB = + eLet (lpVar "a") (eInt64 1L) (eLet (lpVar "b") (eInt64 2L) (eVar "b")) + let useOuter = + eLet (lpVar "a") (eInt64 1L) (eLet (lpVar "b") (eInt64 2L) (eVar "a")) + Expect.equal + (h [] useInnerXY) + (h [] useInnerAB) + "using the inner binding is alpha-stable across renames" + Expect.notEqual + (h [] useInnerAB) + (h [] useOuter) + "using the inner vs the outer binding is a real difference (shadowing respected)" + } + + test + "normalization is idempotent (re-normalizing an already-normalized expr is a structural no-op)" { + // Compare the normalized EXPR structures directly (not through computeFnHash, which normalizes + // internally — that would re-normalize both sides and hide a first-pass difference). normalizeExpr + // preserves ids and only renames binders, so a second pass over the canonical form must be identity. + // Use real binders (let + lambda + a shadowing inner let) so there is something to normalize. + let body = + eLet + (lpVar "outer") + (eInt64 1L) + (eLambda + (gid ()) + [ lpVar "p" ] + (eLet (lpVar "inner") (eVar "p") (eVar "inner"))) + let once = Hashing.normalizeExpr body + let twice = Hashing.normalizeExpr once + Expect.equal + twice + once + "normalizeExpr (normalizeExpr e) is structurally identical to normalizeExpr e" + } ] + + let tests = testList "Hashing" @@ -590,4 +723,5 @@ let tests = let (PT.Hash hFn) = Map.findUnsafe "Test.myFn" hashes1 Expect.isTrue (hTyp.Length = 64) "type hash should be 64 hex chars" Expect.isTrue (hFn.Length = 64) "fn hash should be 64 hex chars" - } ] ] + } ] + alphaNormTests ] diff --git a/backend/tests/Tests/Tests.fs b/backend/tests/Tests/Tests.fs index 9fee97aaa2..f28d14b01d 100644 --- a/backend/tests/Tests/Tests.fs +++ b/backend/tests/Tests/Tests.fs @@ -65,8 +65,7 @@ let main (args : string array) : int = Tests.SyncE2E.tests Tests.Releases.tests Tests.Stream.tests - Tests.Capabilities.tests - Tests.AlphaNormalize.tests ] + Tests.Capabilities.tests ] let cancelationTokenSource = new System.Threading.CancellationTokenSource() let httpClientTestsTask = Tests.HttpClient.init cancelationTokenSource.Token diff --git a/backend/tests/Tests/Tests.fsproj b/backend/tests/Tests/Tests.fsproj index 6dc75ae55c..597bdd27cf 100644 --- a/backend/tests/Tests/Tests.fsproj +++ b/backend/tests/Tests/Tests.fsproj @@ -38,7 +38,6 @@ - From b70b1d9ee246666de8580310749de20a8c6ea460 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 00:44:59 -0400 Subject: [PATCH 053/172] tests: drop the redundant sync-convergence tests from OpsProjections MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit OpsProjections' subject is rebuildProjections (regenerable-from-op-log). Four of its tests — receiveOps idempotency, append+fold, conflict->resolution->converge, origin_ts MIN-reconcile — are sync-convergence cases already covered by SyncScenarios (idempotency, re-pull, conflict->resolution) and MultiInstance (resolution converges, package convergence). Remove them so the file stays on its theme; 546 -> 259 lines, 7/7 green. Co-Authored-By: Claude Opus 4.8 --- backend/tests/Tests/OpsProjections.Tests.fs | 287 -------------------- 1 file changed, 287 deletions(-) diff --git a/backend/tests/Tests/OpsProjections.Tests.fs b/backend/tests/Tests/OpsProjections.Tests.fs index bba867e109..db70f77051 100644 --- a/backend/tests/Tests/OpsProjections.Tests.fs +++ b/backend/tests/Tests/OpsProjections.Tests.fs @@ -256,291 +256,4 @@ let tests = branchesBefore "branches preserved across a re-fold" Expect.equal commitsAfter commitsBefore "commits preserved across a re-fold" - } - - - // The append seam sync sits on (`Seed.receiveOps` ← `Builtin.packageOpsAppendNative`). Re-receiving the log's own - // committed ops is a no-op — INSERT OR IGNORE on the content-addressed ids — so the cursor comes back as - // the current max rowid and the projections are unchanged. This is what makes an incremental pull safe to - // retry; the same append path a real peer's events take (commits shipped alongside them). - testTask - "receiveOps is idempotent and reports zero newly-applied for known ops" { - let! events = - Sql.query - "SELECT id, op_blob, branch_id, commit_hash, origin_ts FROM package_ops WHERE commit_hash IS NOT NULL ORDER BY rowid DESC LIMIT 8" - |> Sql.executeAsync (fun read -> - (System.Guid.Parse(read.string "id"), - read.bytes "op_blob", - System.Guid.Parse(read.string "branch_id"), - read.string "commit_hash", - read.string "origin_ts")) - - Expect.isTrue - (not (List.isEmpty events)) - "there are committed ops to re-receive" - - let! fnsBefore = countRows "package_functions" - let! applied = Seed.receiveOps [] events - let! fnsAfter = countRows "package_functions" - - Expect.equal - applied - 0L - "re-receiving existing ops applies 0 (INSERT OR IGNORE) — the honest change count" - Expect.equal - fnsAfter - fnsBefore - "re-receiving existing ops is a no-op (idempotent append)" - } - - // These tests (and SyncScenarios.Tests.fs) exercise the receive/fold/detect/resolve seam on ONE store, - // applying a "peer's" ops through the real receive path — which is where convergence, LWW, and the - // origin_ts reconcile actually live. The genuinely-two-instance case (N isolated stores syncing the wire, - // torn down per test) lives in MultiInstance.Tests.fs, and the real-process/HTTP case in SyncE2E.Tests.fs. - - // The convergence property, at the seam: a genuinely NEW op arriving from a "peer" (here: a fresh - // SetName binding an unused name to an existing fn hash) must be appended PRESERVING its origin_ts — not - // re-stamped with a fresh local one, which is exactly what would make two instances' LWW diverge — and - // then folded into `locations` by the invisible playback. This is what carries across the HTTP wire. - testTask "receiveOps appends a new op preserving origin_ts and folds it" { - let! fnHash = - Sql.query "SELECT hash FROM package_functions LIMIT 1" - |> Sql.executeRowAsync (fun read -> read.string "hash") - let! commitHash = - Sql.query "SELECT hash FROM commits LIMIT 1" - |> Sql.executeRowAsync (fun read -> read.string "hash") - - let loc : PT.PackageLocation = - { owner = "Test"; modules = [ "SyncConv" ]; name = "thing" } - let op = PT.PackageOp.SetName(loc, PT.Reference.PackageFn(PT.Hash fnHash)) - let opId = Inserts.computeOpHash op - let opBlob = BS.PT.PackageOp.serialize opId op - // A stamp no local edit would ever produce, so preservation is unambiguous. - let distinctiveTs = "2099-01-01 00:00:00.000042" - - let deleteOp () : Task = - Sql.query "DELETE FROM package_ops WHERE id = @id" - |> Sql.parameters [ "id", Sql.uuid opId ] - |> Sql.executeStatementAsync - do! deleteOp () // clean any prior run - - let! _ = - Seed.receiveOps - [] - [ (opId, opBlob, PT.mainBranchId, commitHash, distinctiveTs) ] - - let! storedTs = - Sql.query "SELECT origin_ts FROM package_ops WHERE id = @id" - |> Sql.parameters [ "id", Sql.uuid opId ] - |> Sql.executeRowAsync (fun read -> read.string "origin_ts") - Expect.equal - storedTs - distinctiveTs - "the received op kept its original origin_ts (not a fresh local stamp)" - - let! bound = - Sql.query - "SELECT item_hash FROM locations WHERE owner = 'Test' AND modules = 'SyncConv' AND name = 'thing' AND unlisted_at IS NULL" - |> Sql.executeAsync (fun read -> read.string "item_hash") - Expect.equal - bound - [ fnHash ] - "the received op folded into `locations` (invisible playback)" - - // restore the shared DB: drop the test op + its projection row, re-fold - do! deleteOp () - do! - Sql.query - "DELETE FROM locations WHERE owner = 'Test' AND modules = 'SyncConv' AND name = 'thing'" - |> Sql.executeStatementAsync - let! _ = Seed.rebuildProjections () - () - } - - testTask - "conflict → resolution → converge: divergence detected, LWW applied, human override wins" { - // Two distinct fn contents to bind one name to, in turn. - let! twoFns = - Sql.query "SELECT hash FROM package_functions LIMIT 2" - |> Sql.executeAsync (fun read -> read.string "hash") - - let hashA, hashB = - match twoFns with - | a :: b :: _ -> a, b - | _ -> Exception.raiseInternal "seed needs >=2 functions" [] - - let! commitHash = - Sql.query "SELECT hash FROM commits LIMIT 1" - |> Sql.executeRowAsync (fun read -> read.string "hash") - - let loc : PT.PackageLocation = - { owner = "Test"; modules = [ "Diverge" ]; name = "dv" } - - let mkEvent (h : string) (ts : string) = - let op = PT.PackageOp.SetName(loc, PT.Reference.PackageFn(PT.Hash h)) - let opId = Inserts.computeOpHash op - (opId, BS.PT.PackageOp.serialize opId op, PT.mainBranchId, commitHash, ts) - - let (idA, blobA, _, _, _) = mkEvent hashA "2099-01-01T00:00:00.001Z" - let (idB, blobB, _, _, _) = mkEvent hashB "2099-01-01T00:00:00.002Z" - - let cleanup () : Task = - task { - do! - Sql.query "DELETE FROM package_ops WHERE id = @a OR id = @b" - |> Sql.parameters [ "a", Sql.uuid idA; "b", Sql.uuid idB ] - |> Sql.executeStatementAsync - do! - Sql.query - "DELETE FROM locations WHERE owner = 'Test' AND modules = 'Diverge' AND name = 'dv'" - |> Sql.executeStatementAsync - do! - Sql.query - "DELETE FROM sync_conflicts WHERE location = 'Test.Diverge.dv'" - |> Sql.executeStatementAsync - do! - Sql.query "DELETE FROM resolutions WHERE location = 'Test.Diverge.dv'" - |> Sql.executeStatementAsync - } - - do! cleanup () - - // #1: bind the name to A (no prior binding — no divergence). - let! _ = - Seed.receiveOps - [] - [ (idA, blobA, PT.mainBranchId, commitHash, "2099-01-01T00:00:00.001Z") ] - // #2: a peer's op rebinds it to B — that's a divergence (curHash=A ≠ incoming=B), auto-resolved by LWW. - let! _ = - Seed.receiveOps - [] - [ (idB, blobB, PT.mainBranchId, commitHash, "2099-01-01T00:00:00.002Z") ] - - let! conflicts = LibDB.Conflicts.list () - - let recorded = - conflicts - |> List.exists (fun (c : LibDB.Conflicts.Conflict) -> - c.location = "Test.Diverge.dv" - && c.localHash = hashA - && c.incomingHash = hashB - && c.chosenHash = hashB) // B is newer-by-stamp, so LWW picks it — and that's recorded - - Expect.isTrue - recorded - "detectDivergences recorded the name→two-hashes divergence with the LWW winner" - - // The live binding is B — LWW picked the newer op. - let liveHash () : Task> = - Sql.query - "SELECT item_hash FROM locations WHERE owner = 'Test' AND modules = 'Diverge' AND name = 'dv' AND unlisted_at IS NULL" - |> Sql.executeAsync (fun read -> read.string "item_hash") - - let! boundLww = liveHash () - Expect.equal boundLww [ hashB ] "LWW bound the name to the newer content (B)" - - // A human keeps THEIR version (A): mint + apply a Resolution with a newer `at` so it wins the overlay. - let res : LibDB.Resolutions.Resolution = - { id = "test-resolution-diverge" - branchId = PT.mainBranchId - location = loc - choice = PT.Reference.PackageFn(PT.Hash hashA) - resolvedBy = "human" - at = "2099-01-01T00:00:00.003Z" } - - do! LibDB.Resolutions.recordAndApply res - - // The binding converged on the human's choice (A), overriding the LWW outcome — the "keep mine" that - // then propagates as a synced Resolution so peers converge too. - let! boundResolved = liveHash () - - Expect.equal - boundResolved - [ hashA ] - "the resolution overrode the LWW binding → converged on the human's pick" - - do! cleanup () - let! _ = Seed.rebuildProjections () - () - } - - // The op id is content-only, so two instances that independently author the SAME op - // stamp it with different local origin_ts. receiveOps must reconcile to the MIN (deterministic on every - // instance) in BOTH package_ops AND the folded locations binding — otherwise a later competing edit - // resolves differently on each instance and they diverge permanently. This is the two-instance - // convergence property, reproduced on one store via re-receives at different stamps. - testTask - "a re-received op reconciles origin_ts to the MIN in package_ops + locations (convergence)" { - let! fnHash = - Sql.query "SELECT hash FROM package_functions LIMIT 1" - |> Sql.executeRowAsync (fun read -> read.string "hash") - let! commitHash = - Sql.query "SELECT hash FROM commits LIMIT 1" - |> Sql.executeRowAsync (fun read -> read.string "hash") - - let loc : PT.PackageLocation = - { owner = "Test"; modules = [ "M1Reconcile" ]; name = "dv" } - let op = PT.PackageOp.SetName(loc, PT.Reference.PackageFn(PT.Hash fnHash)) - let opId = Inserts.computeOpHash op - let opBlob = BS.PT.PackageOp.serialize opId op - - let recv (ts : string) : Task = - task { - let! _ = - Seed.receiveOps [] [ (opId, opBlob, PT.mainBranchId, commitHash, ts) ] - () - } - - let opTs () : Task = - Sql.query "SELECT origin_ts FROM package_ops WHERE id = @id" - |> Sql.parameters [ "id", Sql.uuid opId ] - |> Sql.executeRowAsync (fun read -> read.string "origin_ts") - - let locTs () : Task> = - Sql.query - "SELECT origin_ts FROM locations WHERE owner = 'Test' AND modules = 'M1Reconcile' AND name = 'dv' AND unlisted_at IS NULL" - |> Sql.executeAsync (fun read -> read.string "origin_ts") - - let cleanup () : Task = - task { - do! - Sql.query "DELETE FROM package_ops WHERE id = @id" - |> Sql.parameters [ "id", Sql.uuid opId ] - |> Sql.executeStatementAsync - do! - Sql.query - "DELETE FROM locations WHERE owner = 'Test' AND modules = 'M1Reconcile' AND name = 'dv'" - |> Sql.executeStatementAsync - } - - do! cleanup () - - // #1 receive at ts=100 → binding folded with 100 - do! recv "2099-01-01T00:00:00.100Z" - let! ts1 = opTs () - let! loc1 = locTs () - Expect.equal ts1 "2099-01-01T00:00:00.100Z" "op stamped at 100" - Expect.equal loc1 [ "2099-01-01T00:00:00.100Z" ] "binding folded at 100" - - // #2 re-receive the SAME op at an EARLIER 050 → reconcile DOWN to MIN, and the binding re-folds to 050 - do! recv "2099-01-01T00:00:00.050Z" - let! ts2 = opTs () - let! loc2 = locTs () - Expect.equal ts2 "2099-01-01T00:00:00.050Z" "op reconciled to the MIN (050)" - Expect.equal - loc2 - [ "2099-01-01T00:00:00.050Z" ] - "binding origin_ts refreshed to the MIN (050)" - - // #3 re-receive at a LATER 200 → MIN stays 050, no spurious change - do! recv "2099-01-01T00:00:00.200Z" - let! ts3 = opTs () - Expect.equal - ts3 - "2099-01-01T00:00:00.050Z" - "a later stamp never raises the reconciled MIN" - - do! cleanup () - let! _ = Seed.rebuildProjections () - () } ] From 7cfd7e74427e4d06afdb361d7c58b1017d99548c Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 00:46:54 -0400 Subject: [PATCH 054/172] format: run scripts/formatting/format across the touched files Fantomas-only reflow (line wrapping + indentation), no semantic changes. Co-Authored-By: Claude Opus 4.8 --- .../src/Builtins/Builtins.Cli/Libs/Stdin.fs | 38 +++++++++--------- .../Builtins/Builtins.Matter/Libs/Sqlite.fs | 8 ++-- backend/src/Cli/EmbeddedResources.fs | 7 +++- backend/src/LibDB/Conflicts.fs | 3 +- backend/src/LibDB/Releases.fs | 3 +- backend/src/LibDB/Resolutions.fs | 10 ++++- backend/src/LibDB/Tracing.fs | 39 ++++++++++--------- backend/tests/Tests/MultiInstance.Tests.fs | 33 +++++++++++----- backend/tests/Tests/MultiInstanceHarness.fs | 5 +-- backend/tests/Tests/SyncE2E.Tests.fs | 12 ++++-- 10 files changed, 93 insertions(+), 65 deletions(-) diff --git a/backend/src/Builtins/Builtins.Cli/Libs/Stdin.fs b/backend/src/Builtins/Builtins.Cli/Libs/Stdin.fs index cf310d2aa6..f63a0f4ad0 100644 --- a/backend/src/Builtins/Builtins.Cli/Libs/Stdin.fs +++ b/backend/src/Builtins/Builtins.Cli/Libs/Stdin.fs @@ -47,26 +47,26 @@ let private readKeyOrPaste () : ConsoleKeyInfo * string option = (ConsoleKeyInfo('\u001b', ConsoleKey.Escape, false, false, false), None) else - let first = Console.ReadKey true - if not Console.KeyAvailable then - (first, None) - else - let sb = System.Text.StringBuilder() - let append (text : string) : unit = - sb.Append text |> ignore - let mutable last = first - let mutable printableKey = if isPrintable first then Some first else None - pasteText first |> Option.iter append - while Console.KeyAvailable do - let k = Console.ReadKey true - last <- k - pasteText k |> Option.iter append - if isPrintable k then printableKey <- Some k - let pasted = sb.ToString() - if pasted = "" then - (last, None) // only control keys queued, e.g. a scroll + let first = Console.ReadKey true + if not Console.KeyAvailable then + (first, None) else - (Option.defaultValue last printableKey, Some pasted) + let sb = System.Text.StringBuilder() + let append (text : string) : unit = + sb.Append text |> ignore + let mutable last = first + let mutable printableKey = if isPrintable first then Some first else None + pasteText first |> Option.iter append + while Console.KeyAvailable do + let k = Console.ReadKey true + last <- k + pasteText k |> Option.iter append + if isPrintable k then printableKey <- Some k + let pasted = sb.ToString() + if pasted = "" then + (last, None) // only control keys queued, e.g. a scroll + else + (Option.defaultValue last printableKey, Some pasted) let fns () : List = [ { name = fn "stdinReadKey" 0 diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs b/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs index 71665062c6..d88660426d 100644 --- a/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs +++ b/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs @@ -126,7 +126,10 @@ let fns () : List = typeParams = [] parameters = [ Param.make "path" TString "the SQLite file to open" - Param.make "sql" TString "a statement to run (CREATE/INSERT/UPDATE/DELETE…)" + Param.make + "sql" + TString + "a statement to run (CREATE/INSERT/UPDATE/DELETE…)" Param.make "params" (TList TString) @@ -164,7 +167,6 @@ let fns () : List = sqlSpec = NotQueryable previewable = Impure capabilities = LibExecution.Capabilities.Needs.fileReadWrite - deprecated = NotDeprecated } - ] + deprecated = NotDeprecated } ] let builtins () = LibExecution.Builtin.make [] (fns ()) diff --git a/backend/src/Cli/EmbeddedResources.fs b/backend/src/Cli/EmbeddedResources.fs index 5bc123a9a3..826ba2bac6 100644 --- a/backend/src/Cli/EmbeddedResources.fs +++ b/backend/src/Cli/EmbeddedResources.fs @@ -142,7 +142,9 @@ let private carryForwardPeers (backupPath : string) (dbPath : string) : int = else try use conn = - new Microsoft.Data.Sqlite.SqliteConnection($"Data Source={dbPath};Pooling=false") + new Microsoft.Data.Sqlite.SqliteConnection( + $"Data Source={dbPath};Pooling=false" + ) conn.Open() use create = conn.CreateCommand() create.CommandText <- @@ -207,7 +209,8 @@ let private reconcileExistingStore (dbPath : string) : unit = // Every pending step is durable — migrate the store forward in place, PRESERVING the data (schema // copy-swap + op-format re-serialize + refold). No source needed, so the CLI can run it directly. LibDB.Releases.applyPending current - eprintfn $"Upgraded this data directory from {label} to Release {current} (data preserved)." + eprintfn + $"Upgraded this data directory from {label} to Release {current} (data preserved)." | LibDB.Releases.CliUpgrade.Reseed -> // A clean-break Release (content hashing changed) or an untracked store of unknown format: the old // package data can't be reused in place, so back it up and re-seed from the embedded current-Release diff --git a/backend/src/LibDB/Conflicts.fs b/backend/src/LibDB/Conflicts.fs index 57c3336e19..3b395a31d0 100644 --- a/backend/src/LibDB/Conflicts.fs +++ b/backend/src/LibDB/Conflicts.fs @@ -176,7 +176,8 @@ let detectDivergences // a long-superseded SetName records a phantom conflict (curBinding is the newer winner, so it looks // divergent) that surfaces in `dark conflicts` though nothing actually changed. let! applied = - Sql.query "SELECT applied FROM package_ops WHERE id = @id AND branch_id = @branchID" + Sql.query + "SELECT applied FROM package_ops WHERE id = @id AND branch_id = @branchID" |> Sql.parameters [ "id", Sql.uuid opId; "branchID", Sql.uuid branchId ] |> Sql.executeRowOptionAsync (fun read -> read.int64 "applied") diff --git a/backend/src/LibDB/Releases.fs b/backend/src/LibDB/Releases.fs index 694ea5bcab..17b11d6f58 100644 --- a/backend/src/LibDB/Releases.fs +++ b/backend/src/LibDB/Releases.fs @@ -104,7 +104,8 @@ let writeRelease (n : int) : unit = Sql.query $"CREATE TABLE IF NOT EXISTS {releaseTable} (id INTEGER PRIMARY KEY, \"release\" INTEGER NOT NULL)" |> Sql.executeStatementSync - Sql.query $"INSERT OR REPLACE INTO {releaseTable} (id, \"release\") VALUES (0, @release)" + Sql.query + $"INSERT OR REPLACE INTO {releaseTable} (id, \"release\") VALUES (0, @release)" |> Sql.parameters [ "release", Sql.int64 (int64 n) ] |> Sql.executeStatementSync diff --git a/backend/src/LibDB/Resolutions.fs b/backend/src/LibDB/Resolutions.fs index 53a041b10b..3b4113238c 100644 --- a/backend/src/LibDB/Resolutions.fs +++ b/backend/src/LibDB/Resolutions.fs @@ -152,7 +152,10 @@ let recordAndApply (r : Resolution) : Task = do! applyToLocations r // The override settled this location — clear any conflict recorded here (on THIS instance, and on a peer // that received the resolution), so it stops showing as an unreviewed conflict after it's been resolved. - do! Conflicts.markOverriddenByLocation r.branchId (Conflicts.locationString r.location) + do! + Conflicts.markOverriddenByLocation + r.branchId + (Conflicts.locationString r.location) } /// Replay EVERY stored resolution (ordered by `at`) onto the `locations` projection — the overlay half of @@ -181,7 +184,10 @@ let reapplyAll () : Task = // its recorded divergence is 'overridden', not a still-open 'auto-resolved'. (recordAndApply does this on // the live path; a re-fold that goes through reapplyAll must do it too, or the resolved conflict pops back // up as unreviewed in `dark conflicts` after a grow.) - do! Conflicts.markOverriddenByLocation r.branchId (Conflicts.locationString r.location) + do! + Conflicts.markOverriddenByLocation + r.branchId + (Conflicts.locationString r.location) } diff --git a/backend/src/LibDB/Tracing.fs b/backend/src/LibDB/Tracing.fs index 5ffa191dba..30d5f5fbf5 100644 --- a/backend/src/LibDB/Tracing.fs +++ b/backend/src/LibDB/Tracing.fs @@ -488,25 +488,26 @@ let private storeTrace return () else - let traceIdStr = string traceID - use _span = Telemetry.span "trace.store" [ "traceId", traceIdStr ] - try - let! preparedInput = prepareTraceForStorage exeState inputDval state - TraceStorage.store - rootTLID - traceID - handlerDesc - inputVarName - preparedInput - (Seq.toList state.events) - exeState.accountID - with ex -> - System.Console.Error.WriteLine $"[tracing] Failed to store trace: {ex.Message}" - Telemetry.event - "trace.storeFailed" - [ "traceId", traceIdStr - "exception", ex.GetType().FullName - "message", ex.Message ] + let traceIdStr = string traceID + use _span = Telemetry.span "trace.store" [ "traceId", traceIdStr ] + try + let! preparedInput = prepareTraceForStorage exeState inputDval state + TraceStorage.store + rootTLID + traceID + handlerDesc + inputVarName + preparedInput + (Seq.toList state.events) + exeState.accountID + with ex -> + System.Console.Error.WriteLine + $"[tracing] Failed to store trace: {ex.Message}" + Telemetry.event + "trace.storeFailed" + [ "traceId", traceIdStr + "exception", ex.GetType().FullName + "message", ex.Message ] } diff --git a/backend/tests/Tests/MultiInstance.Tests.fs b/backend/tests/Tests/MultiInstance.Tests.fs index 5a04ee92e1..c735ee666b 100644 --- a/backend/tests/Tests/MultiInstance.Tests.fs +++ b/backend/tests/Tests/MultiInstance.Tests.fs @@ -503,7 +503,10 @@ let tests = let! commit = existingCommit () // Binding is fnA at .100. A human resolution ALSO picks fnA (at .300) — so applyToLocations is an // idempotent no-op and the binding's origin_ts stays .100, NOT .300. - let! _ = Seed.receiveOps [] [ setNameEvent loc fnA commit "2026-07-08T00:00:00.100Z" ] + let! _ = + Seed.receiveOps + [] + [ setNameEvent loc fnA commit "2026-07-08T00:00:00.100Z" ] let res = Resolutions.mk loc @@ -517,8 +520,14 @@ let tests = // A fresh fnB op (.200) now arrives and folds via the INCREMENTAL pull path. .200 out-ranks the // binding's stale .100, so the fold flips it to fnB — but the resolution (.300) is newer than .200, so // after receiveOps re-applies the overlay the human's pick MUST win again. - let! folded = Seed.receiveOps [] [ setNameEvent loc fnB commit "2026-07-08T00:00:00.200Z" ] - Expect.isGreaterThan folded 0L "the fnB op actually folded (so the reapply path runs)" + let! folded = + Seed.receiveOps + [] + [ setNameEvent loc fnB commit "2026-07-08T00:00:00.200Z" ] + Expect.isGreaterThan + folded + 0L + "the fnB op actually folded (so the reapply path runs)" let! afterFold = liveHash loc Expect.equal afterFold @@ -545,12 +554,13 @@ let tests = let! probeFn = undeprecatedFunctionHash () Expect.isGreaterThan opsBefore 0L "the seeded store has ops to preserve" - LibDB.Releases.applyRelease - ({ n = 999 - sql = "ALTER TABLE package_ops ADD COLUMN migration_probe TEXT" - reserialize = None - clearForRebuild = false } - : LibDB.Releases.Release) + LibDB.Releases.applyRelease ( + { n = 999 + sql = "ALTER TABLE package_ops ADD COLUMN migration_probe TEXT" + reserialize = None + clearForRebuild = false } + : LibDB.Releases.Release + ) let! hasCol = Sql.query @@ -567,7 +577,10 @@ let tests = opsAfter opsBefore "every op preserved (durable is not a clean-break — nothing cleared)" - Expect.equal fnStillThere 1L "the package content survived the in-place migration" + Expect.equal + fnStillThere + 1L + "the package content survived the in-place migration" finally teardown insts } diff --git a/backend/tests/Tests/MultiInstanceHarness.fs b/backend/tests/Tests/MultiInstanceHarness.fs index f3cab38f05..58c8eed4ba 100644 --- a/backend/tests/Tests/MultiInstanceHarness.fs +++ b/backend/tests/Tests/MultiInstanceHarness.fs @@ -95,10 +95,7 @@ let teardown (insts : List) : unit = // ── helpers (build wire events, inspect projections, convert the JSON-ish wire) ─────────────────────── -let branchEventAt - (op : PT.BranchOp) - (originTs : string) - : string * byte[] * string = +let branchEventAt (op : PT.BranchOp) (originTs : string) : string * byte[] * string = let (PT.Hash h) = Hashing.computeBranchOpHash op (h, BS.PT.BranchOp.serialize h op, originTs) diff --git a/backend/tests/Tests/SyncE2E.Tests.fs b/backend/tests/Tests/SyncE2E.Tests.fs index 839aeb58b9..6749c80054 100644 --- a/backend/tests/Tests/SyncE2E.Tests.fs +++ b/backend/tests/Tests/SyncE2E.Tests.fs @@ -433,15 +433,19 @@ let private realTests = try presync b $"http://127.0.0.1:{port}" // Several pulls — each hits A's /sync/events + blob channel, the path that used to trace + promote. - for _ in 1 .. 6 do + for _ in 1..6 do darkIn b.dir [ "sync" ] |> ignore // A is the SERVER (it only serves, never pulls), so serving must add NOTHING to its store: // trace_fn_calls stays 0, and package_blobs stays exactly at the seed baseline. Comparing the // COUNT (not just >1MB rows) catches ANY promotion — the bug persisted a fresh blob per request, // small at first, so a size threshold would miss it while the store still grew unbounded. - let seedBlobs = (sqlite (seedDb.Force()) "SELECT COUNT(*) FROM package_blobs").Trim() - let traceRows = (sqlite (dbOf a) "SELECT COUNT(*) FROM trace_fn_calls").Trim() - let servedBlobs = (sqlite (dbOf a) "SELECT COUNT(*) FROM package_blobs").Trim() + let seedBlobs = + (sqlite (seedDb.Force()) "SELECT COUNT(*) FROM package_blobs") + .Trim() + let traceRows = + (sqlite (dbOf a) "SELECT COUNT(*) FROM trace_fn_calls").Trim() + let servedBlobs = + (sqlite (dbOf a) "SELECT COUNT(*) FROM package_blobs").Trim() Expect.equal traceRows "0" From 13e209cdb1c92ffbd816b71ec6f3f9e7fb6622b1 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 01:18:58 -0400 Subject: [PATCH 055/172] builtins: split the 599-line Sync.fs by concern MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The earlier reorg over-consolidated — one file held three distinct concerns and the resolution builtins were hard to find in it. Split into Libs/Sync/: Store.fs — localDbPath + currentRelease (store coordinate) OpLog.fs — the op-log read/append wire (package/branch/resolutions) + record helpers Blobs.fs — the content-addressed blob channel Builtins are name-registered, so .dark callers are unaffected; reload + MultiInstance 18/18 green. Co-Authored-By: Claude Opus 4.8 --- .../src/Builtins/Builtins.Matter/Builtin.fs | 6 +- .../Builtins.Matter/Builtins.Matter.fsproj | 4 +- .../Builtins.Matter/Libs/Sync/Blobs.fs | 133 +++++++++++++++ .../Libs/{Sync.fs => Sync/OpLog.fs} | 160 +----------------- .../Builtins.Matter/Libs/Sync/Store.fs | 49 ++++++ 5 files changed, 194 insertions(+), 158 deletions(-) create mode 100644 backend/src/Builtins/Builtins.Matter/Libs/Sync/Blobs.fs rename backend/src/Builtins/Builtins.Matter/Libs/{Sync.fs => Sync/OpLog.fs} (72%) create mode 100644 backend/src/Builtins/Builtins.Matter/Libs/Sync/Store.fs diff --git a/backend/src/Builtins/Builtins.Matter/Builtin.fs b/backend/src/Builtins/Builtins.Matter/Builtin.fs index 83f58ab1a2..ad9e699167 100644 --- a/backend/src/Builtins/Builtins.Matter/Builtin.fs +++ b/backend/src/Builtins/Builtins.Matter/Builtin.fs @@ -18,8 +18,10 @@ let builtins (pm : PT.PackageManager) : Builtins = // Sqlite (raw Stdlib.Sqlite access) Libs.Sqlite.builtins () - // Sync (internal: op-log wire, blobs, store path + Release) - Libs.Sync.builtins () + // Sync (internal machinery, split by concern) + Libs.Sync.Store.builtins () // store path + Release coordinate + Libs.Sync.OpLog.builtins () // op-log read/append wire (package/branch/resolutions) + Libs.Sync.Blobs.builtins () // content-addressed blob channel // Conflicts (dark conflicts UX) Libs.Conflicts.builtins () diff --git a/backend/src/Builtins/Builtins.Matter/Builtins.Matter.fsproj b/backend/src/Builtins/Builtins.Matter/Builtins.Matter.fsproj index 7cb9711d3a..025c54fbf0 100644 --- a/backend/src/Builtins/Builtins.Matter/Builtins.Matter.fsproj +++ b/backend/src/Builtins/Builtins.Matter/Builtins.Matter.fsproj @@ -27,7 +27,9 @@ - + + + diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Sync/Blobs.fs b/backend/src/Builtins/Builtins.Matter/Libs/Sync/Blobs.fs new file mode 100644 index 0000000000..f5a547d941 --- /dev/null +++ b/backend/src/Builtins/Builtins.Matter/Libs/Sync/Blobs.fs @@ -0,0 +1,133 @@ +/// The content-addressed blob channel: `package_blobs` (a value's large content) don't ride the op stream, +/// so after applying a peer's ops the puller fetches the blobs it lacks. Internal machinery under `Darklang.Sync.*`. +module Builtins.Matter.Libs.Sync.Blobs + +open FSharp.Control.Tasks + +open Prelude +open LibExecution.RuntimeTypes +open LibExecution.Builtin.Shortcuts + +module Dval = LibExecution.Dval + +let fns () : List = + [ + // ── HTTP blob channel — package_blobs (a value's large content) don't ride the op stream, so after + // applying a peer's ops the puller fetches the blobs it now lacks. Content-addressed = idempotent. + + // Sender: the blob MANIFEST — every content hash this instance holds, newline-joined (GET /sync/blobs). + { name = fn "syncBlobManifest" 0 + typeParams = [] + parameters = [ Param.make "unit" TUnit "" ] + returnType = TString + description = + "The blob manifest (the GET /sync/blobs body): every content hash this instance holds, newline-joined." + fn = + (function + | _, _, _, [ DUnit ] -> + uply { + let! hashes = LibDB.RuntimeTypes.Blob.allHashes () + return DString(String.concat "\n" hashes) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // Sender: the bytes for one hash, base64 (GET /sync/blob?hash=), or empty if this instance lacks it. + { name = fn "syncBlobBytes" 0 + typeParams = [] + parameters = [ Param.make "hash" TString "The content hash to fetch" ] + returnType = TString + description = + "The bytes for one content hash, base64-encoded (the GET /sync/blob?hash= body), or empty if this instance lacks it." + fn = + (function + | _, _, _, [ DString hash ] -> + uply { + match! LibDB.RuntimeTypes.Blob.get hash with + | Some bytes -> return DString(System.Convert.ToBase64String bytes) + | None -> return DString "" + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // Receiver: of a peer's offered hashes, which this instance LACKS — exactly the blobs to fetch. + { name = fn "syncBlobMissing" 0 + typeParams = [] + parameters = + [ Param.make + "hashes" + (TList TString) + "A peer's offered content hashes (its manifest)" ] + returnType = TList TString + description = + "Of the peer's offered content hashes, which this instance lacks — a pure content-addressed set-difference (no cursor)." + fn = + (function + | _, _, _, [ DList(_, hashDvals) ] -> + uply { + let hashes = + hashDvals + |> List.choose (fun d -> + match d with + | DString s -> Some s + | _ -> None) + let! missing = LibDB.RuntimeTypes.Blob.missing hashes + return Dval.list KTString (missing |> List.map DString) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // Receiver: store a fetched blob — base64-decode + insert under its content hash. Idempotent (dedup). + { name = fn "syncBlobInsert" 0 + typeParams = [] + parameters = + [ Param.make "hash" TString "The content hash" + Param.make + "base64Bytes" + TString + "The blob's bytes, base64-encoded (empty = skip)" ] + returnType = TBool + description = + "Store a fetched blob: base64-decode + insert under its content hash. Idempotent. Returns true if non-empty bytes were inserted, false if the peer's body was empty." + fn = + (function + | _, _, _, [ DString hash; DString b64 ] -> + uply { + if b64 = "" then + return DBool false + else + // Total against a hostile/garbled peer body (bad base64 must not throw), and — the integrity + // core of a content-addressed store — only store bytes that ACTUALLY hash to the claimed hash. + // Without this a peer could serve arbitrary bytes for a legitimate hash and poison the store + // (a value silently becomes different code) for every branch that references it. + match + (try + Some(System.Convert.FromBase64String b64) + with _ -> + None) + with + | None -> return DBool false + | Some bytes -> + if LibExecution.Blob.sha256Hex bytes = hash then + do! LibDB.RuntimeTypes.Blob.insert hash bytes + return DBool true + else + return DBool false + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + ] + +let builtins () = LibExecution.Builtin.make [] (fns ()) diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Sync.fs b/backend/src/Builtins/Builtins.Matter/Libs/Sync/OpLog.fs similarity index 72% rename from backend/src/Builtins/Builtins.Matter/Libs/Sync.fs rename to backend/src/Builtins/Builtins.Matter/Libs/Sync/OpLog.fs index 5ac22fa6d9..f10bcd6355 100644 --- a/backend/src/Builtins/Builtins.Matter/Libs/Sync.fs +++ b/backend/src/Builtins/Builtins.Matter/Libs/Sync/OpLog.fs @@ -1,8 +1,7 @@ -/// Native builtins for the sync surface: the op-log read/append wire (package_ops/branch_ops/resolutions), -/// the content-addressed blob channel, and the instance's store path + Release coordinate. Internal machinery -/// the CLI/sync engine calls (wrapped under `Darklang.Sync.*`) — NOT stdlib. Generic SQLite access lives in -/// `Libs/Sqlite.fs`; these ride on the op log via `LibDB`, not raw SQL. -module Builtins.Matter.Libs.Sync +/// The op-log read/append wire: native read/append builtins over the three logs — `package_ops`, +/// `branch_ops`, and `resolutions`. Internal machinery under `Darklang.Sync.*` (NOT stdlib); records are +/// assembled natively (like `Traces`) so a 1000-op batch stays milliseconds. +module Builtins.Matter.Libs.Sync.OpLog open FSharp.Control.Tasks @@ -13,7 +12,6 @@ open LibExecution.Builtin.Shortcuts module Dval = LibExecution.Dval module PackageRefs = LibExecution.PackageRefs module NR = LibExecution.RuntimeTypes.NameResolution -module Blob = LibExecution.Blob module EventLogRefs = LibExecution.PackageRefs.Type.Sync.EventLog let private eventLogEventType () = FQTypeName.fqPackage (EventLogRefs.event ()) @@ -119,39 +117,6 @@ let private warnSkippedSyncRow (kind : string) : unit = let fns () : List = [ - // This instance's OWN package store path (data.db). The op-log builtins write ops here; the sync config - // tables (sync_peers/sync_cursors) live here too — the daemon/CLI don't have to know the path. - { name = fn "localDbPath" 0 - typeParams = [] - parameters = [ Param.make "unit" TUnit "" ] - returnType = TString - description = "The file path of this instance's own package store (data.db)." - fn = - (function - | _, _, _, [ DUnit ] -> uply { return DString LibConfig.Config.dbPath } - | _ -> incorrectArgs ()) - sqlSpec = NotQueryable - previewable = Impure - capabilities = LibExecution.Capabilities.noCaps - deprecated = NotDeprecated } - - // The Release (store format/version coordinate: language + op-format + schema + hashing) this Dark - // binary speaks. Compared against the store's stamped Release for the upgrade/`dark version` surface. - { name = fn "currentRelease" 0 - typeParams = [] - parameters = [ Param.make "unit" TUnit "" ] - returnType = TInt - description = "The Release (store format/version) this Dark binary speaks." - fn = - (function - | _, _, _, [ DUnit ] -> - uply { return Dval.int (bigint LibDB.Releases.currentRelease) } - | _ -> incorrectArgs ()) - sqlSpec = NotQueryable - previewable = Impure - capabilities = LibExecution.Capabilities.noCaps - deprecated = NotDeprecated } - // ── native op-log read/append + blob-channel builtins (the ops-queue seam sync rides on) ── // CLEANUP(sync-builtins): these operate on the FIXED local store (not an arbitrary path) and still declare // noCaps, so untrusted `dark run` can read/append the op log. Lower-risk than the arbitrary-path sqlite* above @@ -479,121 +444,6 @@ let fns () : List = deprecated = NotDeprecated } - // ── HTTP blob channel — package_blobs (a value's large content) don't ride the op stream, so after - // applying a peer's ops the puller fetches the blobs it now lacks. Content-addressed = idempotent. - - // Sender: the blob MANIFEST — every content hash this instance holds, newline-joined (GET /sync/blobs). - { name = fn "syncBlobManifest" 0 - typeParams = [] - parameters = [ Param.make "unit" TUnit "" ] - returnType = TString - description = - "The blob manifest (the GET /sync/blobs body): every content hash this instance holds, newline-joined." - fn = - (function - | _, _, _, [ DUnit ] -> - uply { - let! hashes = LibDB.RuntimeTypes.Blob.allHashes () - return DString(String.concat "\n" hashes) - } - | _ -> incorrectArgs ()) - sqlSpec = NotQueryable - previewable = Impure - capabilities = LibExecution.Capabilities.noCaps - deprecated = NotDeprecated } - - // Sender: the bytes for one hash, base64 (GET /sync/blob?hash=), or empty if this instance lacks it. - { name = fn "syncBlobBytes" 0 - typeParams = [] - parameters = [ Param.make "hash" TString "The content hash to fetch" ] - returnType = TString - description = - "The bytes for one content hash, base64-encoded (the GET /sync/blob?hash= body), or empty if this instance lacks it." - fn = - (function - | _, _, _, [ DString hash ] -> - uply { - match! LibDB.RuntimeTypes.Blob.get hash with - | Some bytes -> return DString(System.Convert.ToBase64String bytes) - | None -> return DString "" - } - | _ -> incorrectArgs ()) - sqlSpec = NotQueryable - previewable = Impure - capabilities = LibExecution.Capabilities.noCaps - deprecated = NotDeprecated } - - // Receiver: of a peer's offered hashes, which this instance LACKS — exactly the blobs to fetch. - { name = fn "syncBlobMissing" 0 - typeParams = [] - parameters = - [ Param.make - "hashes" - (TList TString) - "A peer's offered content hashes (its manifest)" ] - returnType = TList TString - description = - "Of the peer's offered content hashes, which this instance lacks — a pure content-addressed set-difference (no cursor)." - fn = - (function - | _, _, _, [ DList(_, hashDvals) ] -> - uply { - let hashes = - hashDvals - |> List.choose (fun d -> - match d with - | DString s -> Some s - | _ -> None) - let! missing = LibDB.RuntimeTypes.Blob.missing hashes - return Dval.list KTString (missing |> List.map DString) - } - | _ -> incorrectArgs ()) - sqlSpec = NotQueryable - previewable = Impure - capabilities = LibExecution.Capabilities.noCaps - deprecated = NotDeprecated } - - // Receiver: store a fetched blob — base64-decode + insert under its content hash. Idempotent (dedup). - { name = fn "syncBlobInsert" 0 - typeParams = [] - parameters = - [ Param.make "hash" TString "The content hash" - Param.make - "base64Bytes" - TString - "The blob's bytes, base64-encoded (empty = skip)" ] - returnType = TBool - description = - "Store a fetched blob: base64-decode + insert under its content hash. Idempotent. Returns true if non-empty bytes were inserted, false if the peer's body was empty." - fn = - (function - | _, _, _, [ DString hash; DString b64 ] -> - uply { - if b64 = "" then - return DBool false - else - // Total against a hostile/garbled peer body (bad base64 must not throw), and — the integrity - // core of a content-addressed store — only store bytes that ACTUALLY hash to the claimed hash. - // Without this a peer could serve arbitrary bytes for a legitimate hash and poison the store - // (a value silently becomes different code) for every branch that references it. - match - (try - Some(System.Convert.FromBase64String b64) - with _ -> - None) - with - | None -> return DBool false - | Some bytes -> - if LibExecution.Blob.sha256Hex bytes = hash then - do! LibDB.RuntimeTypes.Blob.insert hash bytes - return DBool true - else - return DBool false - } - | _ -> incorrectArgs ()) - sqlSpec = NotQueryable - previewable = Impure - capabilities = LibExecution.Capabilities.noCaps - deprecated = NotDeprecated } ] + ] let builtins () = LibExecution.Builtin.make [] (fns ()) diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Sync/Store.fs b/backend/src/Builtins/Builtins.Matter/Libs/Sync/Store.fs new file mode 100644 index 0000000000..7bd002d61b --- /dev/null +++ b/backend/src/Builtins/Builtins.Matter/Libs/Sync/Store.fs @@ -0,0 +1,49 @@ +/// Store-metadata builtins: this instance's own package-store path + the Release coordinate it speaks. +/// Internal machinery under `Darklang.Sync.*` (NOT stdlib). +module Builtins.Matter.Libs.Sync.Store + +open FSharp.Control.Tasks + +open Prelude +open LibExecution.RuntimeTypes +open LibExecution.Builtin.Shortcuts + +module Dval = LibExecution.Dval + +let fns () : List = + [ + // This instance's OWN package store path (data.db). The op-log builtins write ops here; the sync config + // tables (sync_peers/sync_cursors) live here too — the daemon/CLI don't have to know the path. + { name = fn "localDbPath" 0 + typeParams = [] + parameters = [ Param.make "unit" TUnit "" ] + returnType = TString + description = "The file path of this instance's own package store (data.db)." + fn = + (function + | _, _, _, [ DUnit ] -> uply { return DString LibConfig.Config.dbPath } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + // The Release (store format/version coordinate: language + op-format + schema + hashing) this Dark + // binary speaks. Compared against the store's stamped Release for the upgrade/`dark version` surface. + { name = fn "currentRelease" 0 + typeParams = [] + parameters = [ Param.make "unit" TUnit "" ] + returnType = TInt + description = "The Release (store format/version) this Dark binary speaks." + fn = + (function + | _, _, _, [ DUnit ] -> + uply { return Dval.int (bigint LibDB.Releases.currentRelease) } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + ] + +let builtins () = LibExecution.Builtin.make [] (fns ()) From d9a068ea670d3e3417f5f753b3aef695580ca47d Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 01:37:02 -0400 Subject: [PATCH 056/172] tests: rewrite MultiInstance to flat root-level tests MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Was a tree-of-death: 18 tests inlined in one testList, each wrapped in a mutable-list + try/finally teardown ceremony. Rewrite to the house style (cf. Stream.Tests.fs): each test is a root-level `let`, grouped in one testList at the end. Bodies are flat + unparanoid — create instances, do the thing, assert, teardown; a failing test just throws. Dropped the now-unused module aliases. 18/18 green. Co-Authored-By: Claude Opus 4.8 --- backend/tests/Tests/MultiInstance.Tests.fs | 1513 +++++++++----------- 1 file changed, 714 insertions(+), 799 deletions(-) diff --git a/backend/tests/Tests/MultiInstance.Tests.fs b/backend/tests/Tests/MultiInstance.Tests.fs index c735ee666b..96076b2ab9 100644 --- a/backend/tests/Tests/MultiInstance.Tests.fs +++ b/backend/tests/Tests/MultiInstance.Tests.fs @@ -1,5 +1,6 @@ -/// Multi-instance sync tests: spin up isolated in-process stores, sync the wire between them via the -/// real receive path, and assert they converge. The harness lives in `MultiInstanceHarness.fs`. +/// Multi-instance sync tests: spin up isolated in-process stores, sync the wire between them via the real +/// receive path, and assert they converge. The harness (instances, wire builders, projection inspectors, and +/// the in-process CLI driver) lives in `MultiInstanceHarness.fs`. module Tests.MultiInstance open Expecto @@ -12,810 +13,724 @@ open Fumble open LibDB.Sqlite module Seed = LibDB.Seed -module Inserts = LibDB.Inserts module Resolutions = LibDB.Resolutions module Account = LibCloud.Account module PT = LibExecution.ProgramTypes -module BS = LibSerialization.Binary.Serialization -module Hashing = LibSerialization.Hashing.Hashing -module File = LibCloud.File -module Config = LibCloud.Config -module RT = LibExecution.RuntimeTypes -module PT2RT = LibExecution.ProgramTypesToRuntimeTypes -module Exe = LibExecution.Execution -module Dval = LibExecution.Dval open Tests.MultiInstanceHarness + +let freshInstancesAreIsolated = + testTask + "fresh instances are isolated stores, and branch structure syncs across the wire" { + let! a = freshInstance "a" + let! b = freshInstance "b" + + activate a + let create = + PT.BranchOp.CreateBranch( + System.Guid.NewGuid(), + "feature", + Some PT.mainBranchId, + None + ) + let! _ = Seed.receiveBranchOps [ branchEvent create ] + let! aBranches = branchNames () + + activate b + let! bBefore = branchNames () + + activate a + let! (wire, _) = Seed.branchOpsSince 0L 1000L + + activate b + let! _ = + Seed.receiveBranchOps ( + wire + |> List.map (fun ((id, hex, ts) : string * string * string) -> + (id, System.Convert.FromHexString hex, ts)) + ) + let! bAfter = branchNames () + + Expect.equal aBranches [ "feature"; "main" ] "A has both branches" + Expect.equal bBefore [ "main" ] "B is isolated: only main before sync" + Expect.equal + bAfter + [ "feature"; "main" ] + "B converged: feature arrived over the wire" + teardown [ a; b ] + } + + +let branchIdentityIsGlobal = + testTask + "branch identity is GLOBAL: a synced branch keeps the SAME id + name (never re-minted)" { + // A branch `whatever` is the same `whatever` on every instance you sync — same id and name, never + // labeled by which instance it came from. Wholesale branch-op sync carries identity verbatim. + let! a = freshInstance "a" + let! b = freshInstance "b" + let branchId = System.Guid.NewGuid() + + activate a + let create = + PT.BranchOp.CreateBranch(branchId, "shared", Some PT.mainBranchId, None) + let! _ = Seed.receiveBranchOps [ branchEvent create ] + let! (wire, _) = Seed.branchOpsSince 0L 1000L + + activate b + let! _ = + Seed.receiveBranchOps ( + wire + |> List.map (fun ((id, hex, ts) : string * string * string) -> + (id, System.Convert.FromHexString hex, ts)) + ) + let! bId = + Sql.query "SELECT id FROM branches WHERE name = @n" + |> Sql.parameters [ "n", Sql.string "shared" ] + |> Sql.executeRowOptionAsync (fun read -> read.string "id") + + Expect.equal + bId + (Some(string branchId)) + "B's `shared` branch has the SAME id A minted" + teardown [ a; b ] + } + + +let freshSchemaStoreRunsSyncPath = + testTask + "a fresh schema-only store runs the sync path (the composite-PK upsert folds a package op)" { + // A fresh store built from schema.sql alone must run receiveOps — whose ON CONFLICT(id, branch_id) upsert + // needs the composite PK to be IN schema.sql, not only in an incremental migration. Guards schema.sql + // drifting from the migrated production schema. + let! a = freshInstance "a" + + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "Fresh" ]; name = "x" } + let fnHash = "00000000000000000000000000000000000000000000000000000000deadbeef" + let commitHash = "fresh-" + string (System.Guid.NewGuid()) + let ts = "2026-07-08T00:00:00.000Z" + let commit = (commitHash, "author x", PT.mainBranchId, Account.IDs.darklang, ts) + + let! _ = Seed.receiveOps [ commit ] [ setNameEvent loc fnHash commitHash ts ] + let! bound = liveHash loc + + Expect.equal + bound + [ fnHash ] + "the package op folded on the fresh schema-built store" + teardown [ a ] + } + + +let packageRenameConverges = + testTask + "package convergence: a rename authored on A folds identically on B via the wire" { + let! a = seededInstance "a" + let! b = seededInstance "b" + + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "Conv" ]; name = "greeting" } + let ts = "2026-07-08T12:00:00.000Z" + + // Author on A: bind a fresh name to a real seeded function, on a new commit. + activate a + let! (fnHash, _) = twoFunctionHashes () + let! commitHash = existingCommit () + let! cursorBefore = currentCursor () + let! _ = Seed.receiveOps [] [ setNameEvent loc fnHash commitHash ts ] + let! aHash = liveHash loc + let! (commits, events) = wireSince cursorBefore + + // Apply A's wire on B. + activate b + let! bBefore = liveHash loc + let! _ = Seed.receiveOps commits events + let! bHash = liveHash loc + + Expect.equal aHash [ fnHash ] "A bound the name" + Expect.equal bBefore [] "B didn't have the binding before sync (isolated seed)" + Expect.equal bHash [ fnHash ] "B converged to A's binding via the wire" + teardown [ a; b ] + } + + +let deprecationConverges = + testTask + "deprecation converges: a Deprecate authored on A folds into `deprecations` on B via the wire" { + // Coverage for a NON-SetName op kind end to end — proves the fold/wire path isn't SetName-specific. + let! a = seededInstance "a" + let! b = seededInstance "b" + + activate a + let! fnHash = undeprecatedFunctionHash () + let! commit = existingCommit () + let! cursorBefore = currentCursor () + + let deprecatedCount () : Task = + Sql.query + "SELECT COUNT(*) AS n FROM deprecations WHERE item_hash = @h AND state = 'deprecated' AND unlisted_at IS NULL" + |> Sql.parameters [ "h", Sql.string fnHash ] + |> Sql.executeRowAsync (fun read -> read.int64 "n") + + let! _ = + Seed.receiveOps [] [ deprecateEvent fnHash commit "2026-07-08T12:00:00.000Z" ] + let! aDep = deprecatedCount () + let! (commits, events) = wireSince cursorBefore + + activate b + let! bBefore = deprecatedCount () + let! _ = Seed.receiveOps commits events + let! bAfter = deprecatedCount () + + Expect.isGreaterThan + aDep + 0L + "A folded the Deprecate op into the deprecations projection" + Expect.equal + bBefore + 0L + "B didn't have the deprecation before sync (isolated seed)" + Expect.isGreaterThan + bAfter + 0L + "B converged: the deprecation arrived + folded via the wire" + teardown [ a; b ] + } + + +let crossStoreConflictConverges = + testTask + "cross-store conflict: concurrent binds to one name converge (LWW) + record a conflict" { + let! a = seededInstance "a" + let! b = seededInstance "b" + + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "Conflict" ]; name = "dup" } + + // A binds loc → fnA at ts …100; B binds loc → fnB at ts …200 (later ⇒ the LWW winner). + activate a + let! (fnA, fnB) = twoFunctionHashes () + let! commit = existingCommit () + let! curA = currentCursor () + let! _ = + Seed.receiveOps [] [ setNameEvent loc fnA commit "2026-07-08T00:00:00.100Z" ] + let! (commitsA, eventsA) = wireSince curA + + activate b + let! curB = currentCursor () + let! _ = + Seed.receiveOps [] [ setNameEvent loc fnB commit "2026-07-08T00:00:00.200Z" ] + let! (commitsB, eventsB) = wireSince curB + + // Cross-sync: B receives A's op (divergence!), A receives B's op. + activate b + let! _ = Seed.receiveOps commitsA eventsA + let! bConflicts = conflictCountAt "Test.Conflict.dup" + let! bFinal = liveHash loc + + activate a + let! _ = Seed.receiveOps commitsB eventsB + let! aFinal = liveHash loc + + Expect.equal + bFinal + [ fnB ] + "B keeps the LWW winner (its own later bind) after receiving A's older op" + Expect.equal + aFinal + [ fnB ] + "A converges to the same LWW winner after receiving B's op" + Expect.equal + bConflicts + 1L + "B recorded exactly this divergence as a conflict (never silent)" + teardown [ a; b ] + } + + +let bidirectionalPull = + testTask "bidirectional pull: A's and B's independent edits both land on the other" { + let! a = seededInstance "a" + let! b = seededInstance "b" + + let locX : PT.PackageLocation = + { owner = "Test"; modules = [ "Bi" ]; name = "x" } + let locY : PT.PackageLocation = + { owner = "Test"; modules = [ "Bi" ]; name = "y" } + let ts = "2026-07-08T12:00:00.000Z" + + activate a + let! (fnA, fnB) = twoFunctionHashes () + let! commit = existingCommit () + let! curA = currentCursor () + let! _ = Seed.receiveOps [] [ setNameEvent locX fnA commit ts ] + let! (cA, eA) = wireSince curA + + activate b + let! curB = currentCursor () + let! _ = Seed.receiveOps [] [ setNameEvent locY fnB commit ts ] + let! (cB, eB) = wireSince curB + + // Sync both directions. + activate b + let! _ = Seed.receiveOps cA eA + let! bx = liveHash locX + let! by = liveHash locY + + activate a + let! _ = Seed.receiveOps cB eB + let! ax = liveHash locX + let! ay = liveHash locY + + Expect.equal ax [ fnA ] "A keeps its own X" + Expect.equal ay [ fnB ] "A gains B's Y" + Expect.equal bx [ fnA ] "B gains A's X" + Expect.equal by [ fnB ] "B keeps its own Y" + teardown [ a; b ] + } + + +let paginationBoundedBatches = + testTask + "pagination: eventsSince returns bounded, disjoint batches with an advancing cursor" { + let! a = seededInstance "a" + + activate a + let! (fnA, _) = twoFunctionHashes () + let! commit = existingCommit () + let! cur0 = currentCursor () + + for i in [ 1; 2; 3 ] do + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "Page" ]; name = $"n{i}" } + let! _ = + Seed.receiveOps + [] + [ setNameEvent loc fnA commit $"2026-07-08T00:00:0{i}.000Z" ] + () + + let! (_, batch1, c1) = Seed.eventsSince cur0 2L + let! (_, batch2, c2) = Seed.eventsSince c1 2L + + Expect.equal (List.length batch1) 2 "first batch is bounded to the limit" + Expect.equal (List.length batch2) 1 "second batch has exactly the remaining op" + Expect.isGreaterThan c1 cur0 "cursor advanced past the first batch" + Expect.isGreaterThan c2 c1 "cursor advanced again" + teardown [ a ] + } + + +let resolutionConverges = + testTask + "resolution converges: a keep-mine override propagates and the other instance adopts it" { + let! a = seededInstance "a" + let! b = seededInstance "b" + + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "Res" ]; name = "pick" } + + // A and B concurrently bind loc; the later stamp (fnB) is the LWW winner on both after cross-sync. + activate a + let! (fnA, fnB) = twoFunctionHashes () + let! commit = existingCommit () + let! curA = currentCursor () + let! _ = + Seed.receiveOps [] [ setNameEvent loc fnA commit "2026-07-08T00:00:00.100Z" ] + let! (cA, eA) = wireSince curA + + activate b + let! curB = currentCursor () + let! _ = + Seed.receiveOps [] [ setNameEvent loc fnB commit "2026-07-08T00:00:00.200Z" ] + let! (cB, eB) = wireSince curB + + activate b + let! _ = Seed.receiveOps cA eA + activate a + let! _ = Seed.receiveOps cB eB + + // A's human overrides back to fnA (a later `at` than either op) and it converges to B via the log. + activate a + let res = + Resolutions.mk + loc + (PT.Reference.PackageFn(PT.Hash fnA)) + "human" + PT.mainBranchId + "2026-07-08T00:00:00.300Z" + do! Resolutions.recordAndApply res + let! aResolved = liveHash loc + let! (resWire, _) = Resolutions.resolutionsSince 0L 1000L + + activate b + let! _ = Resolutions.receiveResolutions resWire + let! bResolved = liveHash loc + + Expect.equal + aResolved + [ fnA ] + "A's resolution overrode the LWW winner back to fnA" + Expect.equal + bResolved + [ fnA ] + "B adopted A's resolution via the synced resolutions log" + teardown [ a; b ] + } + + +let resolutionSurvivesRebuild = + testTask + "resolution survives a projection rebuild — rebuildProjections re-applies the overlay" { + // A rebuild re-folds the op log (which would pick the LWW winner), so it MUST also re-apply the + // resolutions overlay or a human override is silently lost. Effective binding = fold → then resolutions. + let! a = seededInstance "a" + + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "ResRebuild" ]; name = "pick" } + activate a + let! (fnA, fnB) = twoFunctionHashes () + let! commit = existingCommit () + // fnB is the LWW winner (ts .200 > .100); a human overrides back to fnA at a later `at`. + let! _ = + Seed.receiveOps [] [ setNameEvent loc fnA commit "2026-07-08T00:00:00.100Z" ] + let! _ = + Seed.receiveOps [] [ setNameEvent loc fnB commit "2026-07-08T00:00:00.200Z" ] + let res = + Resolutions.mk + loc + (PT.Reference.PackageFn(PT.Hash fnA)) + "human" + PT.mainBranchId + "2026-07-08T00:00:00.300Z" + do! Resolutions.recordAndApply res + let! beforeRebuild = liveHash loc + Expect.equal + beforeRebuild + [ fnA ] + "the override took (fnA, not the LWW winner fnB)" + + let! _ = Seed.rebuildProjections () + let! afterRebuild = liveHash loc + Expect.equal + afterRebuild + [ fnA ] + "the override SURVIVED the rebuild (else it reverts to fnB)" + teardown [ a ] + } + + +let resolutionSurvivesIncrementalFold = + testTask + "resolution survives the INCREMENTAL fold on the pull path (receiveOps re-applies the overlay)" { + // The incremental fold on the PULL path (receiveOps) must re-apply the resolution overlay, just as + // rebuildProjections does; otherwise a synced-in resolution is reverted the moment a later op folds, and + // two peers that had agreed diverge. Hard shape: the resolution's apply is an idempotent no-op (the + // binding already holds the chosen content), so the binding keeps the OLD op's origin_ts; a newer op then + // folds and out-ranks it, and only a post-fold reapply restores the human's pick. + let! a = seededInstance "a" + + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "ResIncFold" ]; name = "pick" } + activate a + let! (fnA, fnB) = twoFunctionHashes () + let! commit = existingCommit () + // Binding is fnA at .100. The resolution ALSO picks fnA (at .300) — so applyToLocations is a no-op and + // the binding's origin_ts stays .100, NOT .300. + let! _ = + Seed.receiveOps [] [ setNameEvent loc fnA commit "2026-07-08T00:00:00.100Z" ] + let res = + Resolutions.mk + loc + (PT.Reference.PackageFn(PT.Hash fnA)) + "human" + PT.mainBranchId + "2026-07-08T00:00:00.300Z" + do! Resolutions.recordAndApply res + let! beforeFold = liveHash loc + Expect.equal beforeFold [ fnA ] "the resolution's pick (fnA) is bound" + + // A fresh fnB op (.200) folds via the INCREMENTAL pull path. .200 out-ranks the binding's stale .100, so + // the fold flips it to fnB — but the resolution (.300) is newer, so the post-fold reapply must win again. + let! folded = + Seed.receiveOps [] [ setNameEvent loc fnB commit "2026-07-08T00:00:00.200Z" ] + Expect.isGreaterThan + folded + 0L + "the fnB op actually folded (so the reapply path runs)" + let! afterFold = liveHash loc + Expect.equal + afterFold + [ fnA ] + "the override survives the incremental fold (else receiveOps folds to fnB)" + teardown [ a ] + } + + +let durableReleaseMigratesInPlace = + testTask + "a durable Release migrates a seeded store IN PLACE, preserving its data (not a clean-break)" { + // Guards the CLI data-preserving upgrade path (planCliUpgrade MigrateInPlace → applyPending → + // applyRelease's durable branch). A durable step (here an additive schema column) must land on an EXISTING + // store and keep every op + its projected content — unlike a clean-break, which clears. + let! a = seededInstance "durablemig" + + activate a + let countOps () = + Sql.query "SELECT COUNT(*) AS n FROM package_ops" + |> Sql.executeRowAsync (fun read -> read.int64 "n") + let! opsBefore = countOps () + let! probeFn = undeprecatedFunctionHash () + Expect.isGreaterThan opsBefore 0L "the seeded store has ops to preserve" + + LibDB.Releases.applyRelease ( + { n = 999 + sql = "ALTER TABLE package_ops ADD COLUMN migration_probe TEXT" + reserialize = None + clearForRebuild = false } + : LibDB.Releases.Release + ) + + let! hasCol = + Sql.query + "SELECT COUNT(*) AS n FROM pragma_table_info('package_ops') WHERE name = 'migration_probe'" + |> Sql.executeRowAsync (fun read -> read.int64 "n") + let! opsAfter = countOps () + let! fnStillThere = + Sql.query "SELECT COUNT(*) AS n FROM package_functions WHERE hash = @h" + |> Sql.parameters [ "h", Sql.string probeFn ] + |> Sql.executeRowAsync (fun read -> read.int64 "n") + + Expect.equal hasCol 1L "the durable schema step added the column in place" + Expect.equal + opsAfter + opsBefore + "every op preserved (durable is not a clean-break)" + Expect.equal + fnStillThere + 1L + "the package content survived the in-place migration" + teardown [ a ] + } + + +let branchMergeSyncs = + testTask + "branch merge syncs across stores: a branch's create + merge land on B (merged_at set)" { + let! a = seededInstance "a" + let! b = seededInstance "b" + + let branchId = System.Guid.NewGuid() + + activate a + let! baseCommit = existingCommit () + let! bCur0 = currentBranchCursor () + + let createB = + branchEvent ( + PT.BranchOp.CreateBranch( + branchId, + "feature", + Some PT.mainBranchId, + Some(PT.Hash baseCommit) + ) + ) + let mergeB = branchEvent (PT.BranchOp.MergeBranch(branchId, PT.mainBranchId)) + + // Author on A: create the branch, then merge it. (Content-on-branch folding is covered by SyncScenarios; + // merge re-homes it, so this focuses on the lifecycle sync.) + let! _ = Seed.receiveBranchOps [ createB ] + let! _ = Seed.receiveBranchOps [ mergeB ] + let! (branchWire, _) = Seed.branchOpsSince bCur0 1000L + + activate b + let! _ = + Seed.receiveBranchOps ( + branchWire + |> List.map (fun ((id, hex, ts) : string * string * string) -> + (id, System.Convert.FromHexString hex, ts)) + ) + + let! branchExists = + Sql.query "SELECT count(*) AS n FROM branches WHERE id = @b" + |> Sql.parameters [ "b", Sql.uuid branchId ] + |> Sql.executeRowAsync (fun read -> read.int64 "n") + let! mergedAt = + Sql.query "SELECT merged_at FROM branches WHERE id = @b" + |> Sql.parameters [ "b", Sql.uuid branchId ] + |> Sql.executeRowAsync (fun read -> read.stringOrNone "merged_at") + + Expect.equal branchExists 1L "the branch's create + merge synced to B" + Expect.isSome mergedAt "the merge marked the branch merged on B" + teardown [ a; b ] + } + + +let concurrentRebasesConverge = + testTask + "concurrent rebases of one branch converge to the LWW winner, order-independent" { + let! a = seededInstance "a" + let! b = seededInstance "b" + + let branchId = System.Guid.NewGuid() + let baseX = "1111111111111111111111111111111111111111111111111111111111111111" + let baseY = "2222222222222222222222222222222222222222222222222222222222222222" + + // Both instances know the branch (shared CreateBranch, older than either rebase). Then two instances + // rebase it CONCURRENTLY to different bases: X at ts .200 (newer) beats Y at ts .100. + let createB = + branchEventAt + (PT.BranchOp.CreateBranch(branchId, "feature", Some PT.mainBranchId, None)) + "2026-01-01T00:00:00.000Z" + let rebaseX = + branchEventAt + (PT.BranchOp.RebaseBranch(branchId, PT.Hash baseX)) + "2026-07-08T00:00:00.200Z" + let rebaseY = + branchEventAt + (PT.BranchOp.RebaseBranch(branchId, PT.Hash baseY)) + "2026-07-08T00:00:00.100Z" + + let baseOf () : Task> = + Sql.query "SELECT base_commit_hash FROM branches WHERE id = @id" + |> Sql.parameters [ "id", Sql.uuid branchId ] + |> Sql.executeRowAsync (fun read -> read.stringOrNone "base_commit_hash") + + // A authors X (newer), THEN receives Y (older) — Y must lose the LWW. + activate a + let! _ = Seed.receiveBranchOps [ createB ] + let! _ = Seed.receiveBranchOps [ rebaseX ] + let! _ = Seed.receiveBranchOps [ rebaseY ] + let! aBase = baseOf () + + // B authors Y (older) FIRST, THEN receives X (newer) — X arrives last but must still win. + activate b + let! _ = Seed.receiveBranchOps [ createB ] + let! _ = Seed.receiveBranchOps [ rebaseY ] + let! _ = Seed.receiveBranchOps [ rebaseX ] + let! bBase = baseOf () + + Expect.equal aBase (Some baseX) "A: the newer rebase (ts .200 → baseX) wins" + Expect.equal + bBase + (Some baseX) + "B: converges to the SAME base though the winner arrived last" + teardown [ a; b ] + } + + +let darkConflictsRendersConflict = + testTask + "dark conflicts renders a real recorded conflict (regression: short-hash slice was Int32)" { + // `conflicts.dark`'s `short` did `String.slice h 0 8` with bare Int32 literals; `String.slice` wants + // `Int`, so the whole `dark conflicts` display threw a type-mismatch on ANY real conflict. No unit test + // drove the display, so it was invisible. Build a genuine cross-store conflict, then assert the CLI + // renders it (location + truncated hashes) instead of crashing. + let! a = seededInstance "a" + let! b = seededInstance "b" + + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "ConflictCli" ]; name = "dup" } + activate a + let! (fnA, fnB) = twoFunctionHashes () + let! commit = existingCommit () + let! curA = currentCursor () + let! _ = + Seed.receiveOps [] [ setNameEvent loc fnA commit "2026-07-08T00:00:00.100Z" ] + let! (cA, eA) = wireSince curA + + activate b + let! _ = + Seed.receiveOps [] [ setNameEvent loc fnB commit "2026-07-08T00:00:00.200Z" ] + // B (holding the later LWW winner) receives A's older op → records a conflict. + let! _ = Seed.receiveOps cA eA + let! n = conflictCountAt "Test.ConflictCli.dup" + Expect.equal n 1L "the divergence was recorded as a conflict on B" + + let! state = buildCliState () + let! out = runCli state [ "conflicts" ] + // If `short` regressed, `String.slice` throws, `executeFunction` returns Error, and `runCli` fails the + // test. Reaching here with the location rendered is the guard. + Expect.stringContains + out + "Test.ConflictCli.dup" + "the CLI lists the diverged location instead of crashing" + teardown [ a; b ] + } + + +let darkConflictsCleanPath = + testTask + "dark conflicts on a converged store reports no conflicts (the clean path)" { + let! a = seededInstance "a" + + activate a + let! n = conflictCount () + Expect.equal n 0L "a freshly-seeded store has no conflicts" + + let! state = buildCliState () + let! out = runCli state [ "conflicts" ] + Expect.stringContains + out + "converged" + "the clean path reports everything is converged" + teardown [ a ] + } + + +let cliDriverReadsActiveStore = + testTask + "the in-process CLI driver reads the active store (dispatch + rendering work end to end)" { + // Sanity that runCli drives the real dispatch against the swapped store, so the CLI tests above are + // meaningful. `version` is a pure, always-available command with stable output. + let! a = seededInstance "a" + + activate a + let! state = buildCliState () + let! out = runCli state [ "version" ] + Expect.isFalse (out = "") "the CLI produced output for `version`" + teardown [ a ] + } + + +let viewsRealSeededItem = + testTask + "an instance can view a real seeded package item — `dark view Stdlib.Option.Option`" { + // Grounds the synthetic Test.* convergence scenarios in something real: the seeded store holds REAL + // packages, and the CLI resolves + renders a well-known one. + let! a = seededInstance "a" + + activate a + let! state = buildCliState () + let! out = runCli state [ "view"; "Darklang.Stdlib.Option.Option" ] + Expect.stringContains out "Option" "the real Option type resolves + renders" + let low = (out : string).ToLower() + Expect.isFalse + (low.Contains "not found" || low.Contains "no such" || low.Contains "error") + "the view isn't an error banner" + teardown [ a ] + } + + let tests = testSequenced <| testList "MultiInstance" - [ testTask - "fresh instances are isolated stores, and branch structure syncs across the wire" { - let mutable insts : List = [] - - try - let! a = freshInstance "a" - insts <- [ a ] - let! b = freshInstance "b" - insts <- [ a; b ] - - activate a - let create = - PT.BranchOp.CreateBranch( - System.Guid.NewGuid(), - "feature", - Some PT.mainBranchId, - None - ) - let! _ = Seed.receiveBranchOps [ branchEvent create ] - let! aBranches = branchNames () - - activate b - let! bBefore = branchNames () - - activate a - let! (wire, _cursor) = Seed.branchOpsSince 0L 1000L - - activate b - let! _ = - Seed.receiveBranchOps ( - wire - |> List.map (fun ((id, hex, ts) : string * string * string) -> - (id, System.Convert.FromHexString hex, ts)) - ) - let! bAfter = branchNames () - - Expect.equal aBranches [ "feature"; "main" ] "A has both branches" - Expect.equal bBefore [ "main" ] "B is isolated: only main before sync" - Expect.equal - bAfter - [ "feature"; "main" ] - "B converged: feature arrived over the wire" - finally - teardown insts - } - - testTask - "branch identity is GLOBAL: a synced branch keeps the SAME id + name (never re-minted / instance-scoped)" { - // Stachu's invariant: a branch `whatever` is the same `whatever` on every instance you sync — same id - // and name, never labeled by which instance/peer/account it came from. Wholesale branch-op sync must - // carry the branch's identity verbatim, not re-mint it on the receiver. - let mutable insts : List = [] - try - let! a = freshInstance "a" - insts <- [ a ] - let! b = freshInstance "b" - insts <- [ a; b ] - let branchId = System.Guid.NewGuid() - activate a - let create = - PT.BranchOp.CreateBranch(branchId, "shared", Some PT.mainBranchId, None) - let! _ = Seed.receiveBranchOps [ branchEvent create ] - let! (wire, _) = Seed.branchOpsSince 0L 1000L - activate b - let! _ = - Seed.receiveBranchOps ( - wire - |> List.map (fun ((id, hex, ts) : string * string * string) -> - (id, System.Convert.FromHexString hex, ts)) - ) - let idByName (name : string) : Task> = - Sql.query "SELECT id FROM branches WHERE name = @n" - |> Sql.parameters [ "n", Sql.string name ] - |> Sql.executeRowOptionAsync (fun read -> read.string "id") - let! bId = idByName "shared" - Expect.equal - bId - (Some(string branchId)) - "B's `shared` branch has the SAME id A minted — branch identity is global, not per-instance" - finally - teardown insts - } - - testTask - "a fresh schema-only store runs the sync path (the composite-PK upsert folds a package op)" { - let mutable insts : List = [] - - try - let! a = freshInstance "a" - insts <- [ a ] - - // A fresh store built from schema.sql alone must run receiveOps — whose ON CONFLICT(id, branch_id) - // upsert needs the composite PK to be IN schema.sql (not only in an incremental migration). This - // guards against schema.sql drifting from the migrated production schema. - let loc : PT.PackageLocation = - { owner = "Test"; modules = [ "Fresh" ]; name = "x" } - let fnHash = - "00000000000000000000000000000000000000000000000000000000deadbeef" - let commitHash = "fresh-" + string (System.Guid.NewGuid()) - let ts = "2026-07-08T00:00:00.000Z" - let commit = - (commitHash, "author x", PT.mainBranchId, Account.IDs.darklang, ts) - - let! _ = - Seed.receiveOps [ commit ] [ setNameEvent loc fnHash commitHash ts ] - let! bound = liveHash loc - - Expect.equal - bound - [ fnHash ] - "the package op folded on the fresh schema-built store" - finally - teardown insts - } - - testTask - "package convergence: a rename authored on A folds identically on B via the wire" { - let mutable insts : List = [] - - try - let! a = seededInstance "a" - insts <- [ a ] - let! b = seededInstance "b" - insts <- [ a; b ] - - let loc : PT.PackageLocation = - { owner = "Test"; modules = [ "Conv" ]; name = "greeting" } - let ts = "2026-07-08T12:00:00.000Z" - - // Author on A: bind a fresh name to a real seeded function, on a new commit. - activate a - let! (fnHash, _) = twoFunctionHashes () - let! commitHash = existingCommit () - let! cursorBefore = currentCursor () - let! _ = Seed.receiveOps [] [ setNameEvent loc fnHash commitHash ts ] - let! aHash = liveHash loc - let! (commits, events) = wireSince cursorBefore - - // Apply A's wire on B. - activate b - let! bBefore = liveHash loc - let! _ = Seed.receiveOps commits events - let! bHash = liveHash loc - - Expect.equal aHash [ fnHash ] "A bound the name" - Expect.equal - bBefore - [] - "B didn't have the binding before sync (isolated seed)" - Expect.equal bHash [ fnHash ] "B converged to A's binding via the wire" - finally - teardown insts - } - - testTask - "deprecation converges: a Deprecate authored on A folds into `deprecations` on B via the wire" { - // Coverage for a NON-SetName op kind end to end — the `deprecations` projection folds + syncs like - // locations do. Proves the fold/wire path isn't SetName-specific. - let mutable insts : List = [] - try - let! a = seededInstance "a" - insts <- [ a ] - let! b = seededInstance "b" - insts <- [ a; b ] - activate a - let! fnHash = undeprecatedFunctionHash () - let! commit = existingCommit () - let! cursorBefore = currentCursor () - let deprecatedCount () : Task = - Sql.query - "SELECT COUNT(*) AS n FROM deprecations WHERE item_hash = @h AND state = 'deprecated' AND unlisted_at IS NULL" - |> Sql.parameters [ "h", Sql.string fnHash ] - |> Sql.executeRowAsync (fun read -> read.int64 "n") - let! _ = - Seed.receiveOps - [] - [ deprecateEvent fnHash commit "2026-07-08T12:00:00.000Z" ] - let! aDep = deprecatedCount () - let! (commits, events) = wireSince cursorBefore - activate b - let! bBefore = deprecatedCount () - let! _ = Seed.receiveOps commits events - let! bAfter = deprecatedCount () - Expect.isGreaterThan - aDep - 0L - "A folded the Deprecate op into the deprecations projection" - Expect.equal - bBefore - 0L - "B didn't have the deprecation before sync (isolated seed)" - Expect.isGreaterThan - bAfter - 0L - "B converged: the deprecation arrived + folded via the wire" - finally - teardown insts - } - - testTask - "cross-store conflict: concurrent binds to one name converge (LWW) + record a conflict" { - let mutable insts : List = [] - - try - let! a = seededInstance "a" - insts <- [ a ] - let! b = seededInstance "b" - insts <- [ a; b ] - - let loc : PT.PackageLocation = - { owner = "Test"; modules = [ "Conflict" ]; name = "dup" } - - // A binds loc → fnA at ts …100; B binds loc → fnB at ts …200 (later ⇒ the LWW winner). - activate a - let! (fnA, fnB) = twoFunctionHashes () - let! commit = existingCommit () - let! curA = currentCursor () - let! _ = - Seed.receiveOps - [] - [ setNameEvent loc fnA commit "2026-07-08T00:00:00.100Z" ] - let! (commitsA, eventsA) = wireSince curA - - activate b - let! curB = currentCursor () - let! _ = - Seed.receiveOps - [] - [ setNameEvent loc fnB commit "2026-07-08T00:00:00.200Z" ] - let! (commitsB, eventsB) = wireSince curB - - // Cross-sync: B receives A's op (divergence!), A receives B's op. - activate b - let! _ = Seed.receiveOps commitsA eventsA - let! bConflicts = conflictCountAt "Test.Conflict.dup" - let! bFinal = liveHash loc - - activate a - let! _ = Seed.receiveOps commitsB eventsB - let! aFinal = liveHash loc - - Expect.equal - bFinal - [ fnB ] - "B keeps the LWW winner (its own later bind) after receiving A's older op" - Expect.equal - aFinal - [ fnB ] - "A converges to the same LWW winner after receiving B's op" - Expect.equal - bConflicts - 1L - "B recorded exactly this divergence as a conflict (never silent)" - finally - teardown insts - } - - testTask - "bidirectional pull: A's and B's independent edits both land on the other" { - let mutable insts : List = [] - - try - let! a = seededInstance "a" - insts <- [ a ] - let! b = seededInstance "b" - insts <- [ a; b ] - - let locX : PT.PackageLocation = - { owner = "Test"; modules = [ "Bi" ]; name = "x" } - let locY : PT.PackageLocation = - { owner = "Test"; modules = [ "Bi" ]; name = "y" } - let ts = "2026-07-08T12:00:00.000Z" - - activate a - let! (fnA, fnB) = twoFunctionHashes () - let! commit = existingCommit () - let! curA = currentCursor () - let! _ = Seed.receiveOps [] [ setNameEvent locX fnA commit ts ] - let! (cA, eA) = wireSince curA - - activate b - let! curB = currentCursor () - let! _ = Seed.receiveOps [] [ setNameEvent locY fnB commit ts ] - let! (cB, eB) = wireSince curB - - // Sync both directions. - activate b - let! _ = Seed.receiveOps cA eA - let! bx = liveHash locX - let! by = liveHash locY - - activate a - let! _ = Seed.receiveOps cB eB - let! ax = liveHash locX - let! ay = liveHash locY - - Expect.equal ax [ fnA ] "A keeps its own X" - Expect.equal ay [ fnB ] "A gains B's Y" - Expect.equal bx [ fnA ] "B gains A's X" - Expect.equal by [ fnB ] "B keeps its own Y" - finally - teardown insts - } - - testTask - "pagination: eventsSince returns bounded, disjoint batches with an advancing cursor" { - let mutable insts : List = [] - - try - let! a = seededInstance "a" - insts <- [ a ] - - activate a - let! (fnA, _) = twoFunctionHashes () - let! commit = existingCommit () - let! cur0 = currentCursor () - - for i in [ 1; 2; 3 ] do - let loc : PT.PackageLocation = - { owner = "Test"; modules = [ "Page" ]; name = $"n{i}" } - let! _ = - Seed.receiveOps - [] - [ setNameEvent loc fnA commit $"2026-07-08T00:00:0{i}.000Z" ] - () - - let! (_, batch1, c1) = Seed.eventsSince cur0 2L - let! (_, batch2, c2) = Seed.eventsSince c1 2L - - Expect.equal (List.length batch1) 2 "first batch is bounded to the limit" - Expect.equal - (List.length batch2) - 1 - "second batch has exactly the remaining op" - Expect.isGreaterThan c1 cur0 "cursor advanced past the first batch" - Expect.isGreaterThan c2 c1 "cursor advanced again" - finally - teardown insts - } - - testTask - "resolution converges: a keep-mine override propagates and the other instance adopts it" { - let mutable insts : List = [] - - try - let! a = seededInstance "a" - insts <- [ a ] - let! b = seededInstance "b" - insts <- [ a; b ] - - let loc : PT.PackageLocation = - { owner = "Test"; modules = [ "Res" ]; name = "pick" } - - // A and B concurrently bind loc; the later stamp (fnB) is the LWW winner on both after cross-sync. - activate a - let! (fnA, fnB) = twoFunctionHashes () - let! commit = existingCommit () - let! curA = currentCursor () - let! _ = - Seed.receiveOps - [] - [ setNameEvent loc fnA commit "2026-07-08T00:00:00.100Z" ] - let! (cA, eA) = wireSince curA - - activate b - let! curB = currentCursor () - let! _ = - Seed.receiveOps - [] - [ setNameEvent loc fnB commit "2026-07-08T00:00:00.200Z" ] - let! (cB, eB) = wireSince curB - - activate b - let! _ = Seed.receiveOps cA eA - activate a - let! _ = Seed.receiveOps cB eB - - // A's human overrides back to fnA (a later `at` than either op) and it converges to B via the log. - activate a - let res = - Resolutions.mk - loc - (PT.Reference.PackageFn(PT.Hash fnA)) - "human" - PT.mainBranchId - "2026-07-08T00:00:00.300Z" - do! Resolutions.recordAndApply res - let! aResolved = liveHash loc - let! (resWire, _) = Resolutions.resolutionsSince 0L 1000L - - activate b - let! _ = Resolutions.receiveResolutions resWire - let! bResolved = liveHash loc - - Expect.equal - aResolved - [ fnA ] - "A's resolution overrode the LWW winner back to fnA" - Expect.equal - bResolved - [ fnA ] - "B adopted A's resolution via the synced resolutions log" - finally - teardown insts - } - - testTask - "resolution survives a projection rebuild — rebuildProjections re-applies the overlay" { - // Guards the S6 fix: a rebuild re-folds the op log (which would pick the LWW winner), so it MUST also - // re-apply the resolutions overlay or a human override is silently lost. "effective binding = fold → - // then apply resolutions." - let mutable insts : List = [] - try - let! a = seededInstance "a" - insts <- [ a ] - let loc : PT.PackageLocation = - { owner = "Test"; modules = [ "ResRebuild" ]; name = "pick" } - activate a - let! (fnA, fnB) = twoFunctionHashes () - let! commit = existingCommit () - // fnB is the LWW winner (ts .200 > .100); a human overrides back to fnA at a later `at`. - let! _ = - Seed.receiveOps - [] - [ setNameEvent loc fnA commit "2026-07-08T00:00:00.100Z" ] - let! _ = - Seed.receiveOps - [] - [ setNameEvent loc fnB commit "2026-07-08T00:00:00.200Z" ] - let res = - Resolutions.mk - loc - (PT.Reference.PackageFn(PT.Hash fnA)) - "human" - PT.mainBranchId - "2026-07-08T00:00:00.300Z" - do! Resolutions.recordAndApply res - let! beforeRebuild = liveHash loc - Expect.equal - beforeRebuild - [ fnA ] - "the override took (fnA, not the LWW winner fnB)" - // The rebuild re-folds from the op log AND (S6) re-applies resolutions. - let! _ = Seed.rebuildProjections () - let! afterRebuild = liveHash loc - Expect.equal - afterRebuild - [ fnA ] - "the override SURVIVED the rebuild — without reapplyAll it would revert to the LWW winner fnB" - finally - teardown insts - } - - testTask - "resolution survives the INCREMENTAL fold on the pull path (receiveOps re-applies the overlay)" { - // The incremental fold on the PULL path (receiveOps -> applyUnappliedOps) must re-apply the resolution - // overlay, just as rebuildProjections does (test above); otherwise a synced-in resolution is silently - // reverted the moment a later op folds, and two peers that had agreed diverge. The hard shape covered - // here: the resolution's apply is an idempotent no-op because the binding already holds the chosen - // content, so the binding keeps the OLD op's origin_ts; a newer op then folds and out-ranks it, and - // only a post-fold reapply restores the human's pick. - let mutable insts : List = [] - try - let! a = seededInstance "a" - insts <- [ a ] - let loc : PT.PackageLocation = - { owner = "Test"; modules = [ "ResIncFold" ]; name = "pick" } - activate a - let! (fnA, fnB) = twoFunctionHashes () - let! commit = existingCommit () - // Binding is fnA at .100. A human resolution ALSO picks fnA (at .300) — so applyToLocations is an - // idempotent no-op and the binding's origin_ts stays .100, NOT .300. - let! _ = - Seed.receiveOps - [] - [ setNameEvent loc fnA commit "2026-07-08T00:00:00.100Z" ] - let res = - Resolutions.mk - loc - (PT.Reference.PackageFn(PT.Hash fnA)) - "human" - PT.mainBranchId - "2026-07-08T00:00:00.300Z" - do! Resolutions.recordAndApply res - let! beforeFold = liveHash loc - Expect.equal beforeFold [ fnA ] "the resolution's pick (fnA) is bound" - // A fresh fnB op (.200) now arrives and folds via the INCREMENTAL pull path. .200 out-ranks the - // binding's stale .100, so the fold flips it to fnB — but the resolution (.300) is newer than .200, so - // after receiveOps re-applies the overlay the human's pick MUST win again. - let! folded = - Seed.receiveOps - [] - [ setNameEvent loc fnB commit "2026-07-08T00:00:00.200Z" ] - Expect.isGreaterThan - folded - 0L - "the fnB op actually folded (so the reapply path runs)" - let! afterFold = liveHash loc - Expect.equal - afterFold - [ fnA ] - "the override survives the incremental fold (without the post-fold reapply, receiveOps folds to fnB)" - finally - teardown insts - } - - testTask - "a durable Release migrates a seeded store IN PLACE, preserving its data (not a clean-break)" { - // Guards the CLI data-preserving upgrade path (planCliUpgrade MigrateInPlace -> applyPending -> - // applyRelease's durable branch). A durable step (here an additive schema column) must land on an - // EXISTING store and keep every op + its projected content — unlike a clean-break, which clears. - let mutable insts : List = [] - try - let! a = seededInstance "durablemig" - insts <- [ a ] - activate a - let countOps () = - Sql.query "SELECT COUNT(*) AS n FROM package_ops" - |> Sql.executeRowAsync (fun read -> read.int64 "n") - let! opsBefore = countOps () - let! probeFn = undeprecatedFunctionHash () - Expect.isGreaterThan opsBefore 0L "the seeded store has ops to preserve" - - LibDB.Releases.applyRelease ( - { n = 999 - sql = "ALTER TABLE package_ops ADD COLUMN migration_probe TEXT" - reserialize = None - clearForRebuild = false } - : LibDB.Releases.Release - ) - - let! hasCol = - Sql.query - "SELECT COUNT(*) AS n FROM pragma_table_info('package_ops') WHERE name = 'migration_probe'" - |> Sql.executeRowAsync (fun read -> read.int64 "n") - let! opsAfter = countOps () - let! fnStillThere = - Sql.query "SELECT COUNT(*) AS n FROM package_functions WHERE hash = @h" - |> Sql.parameters [ "h", Sql.string probeFn ] - |> Sql.executeRowAsync (fun read -> read.int64 "n") - - Expect.equal hasCol 1L "the durable schema step added the column in place" - Expect.equal - opsAfter - opsBefore - "every op preserved (durable is not a clean-break — nothing cleared)" - Expect.equal - fnStillThere - 1L - "the package content survived the in-place migration" - finally - teardown insts - } - - testTask - "branch merge syncs across stores: a branch's create + merge land on B (merged_at set)" { - let mutable insts : List = [] - - try - let! a = seededInstance "a" - insts <- [ a ] - let! b = seededInstance "b" - insts <- [ a; b ] - - let branchId = System.Guid.NewGuid() - - activate a - let! baseCommit = existingCommit () - let! bCur0 = currentBranchCursor () - - let createB = - branchEvent ( - PT.BranchOp.CreateBranch( - branchId, - "feature", - Some PT.mainBranchId, - Some(PT.Hash baseCommit) - ) - ) - let mergeB = - branchEvent (PT.BranchOp.MergeBranch(branchId, PT.mainBranchId)) - - // Author on A: create the branch, then merge it. (Content-on-branch folding is covered by - // SyncScenarios before the merge; merge re-homes it, so this focuses on the lifecycle sync.) - let! _ = Seed.receiveBranchOps [ createB ] - let! _ = Seed.receiveBranchOps [ mergeB ] - - let! (branchWire, _) = Seed.branchOpsSince bCur0 1000L - - activate b - let! _ = - Seed.receiveBranchOps ( - branchWire - |> List.map (fun ((id, hex, ts) : string * string * string) -> - (id, System.Convert.FromHexString hex, ts)) - ) - - let! branchExists = - Sql.query "SELECT count(*) AS n FROM branches WHERE id = @b" - |> Sql.parameters [ "b", Sql.uuid branchId ] - |> Sql.executeRowAsync (fun read -> read.int64 "n") - let! mergedAt = - Sql.query "SELECT merged_at FROM branches WHERE id = @b" - |> Sql.parameters [ "b", Sql.uuid branchId ] - |> Sql.executeRowAsync (fun read -> read.stringOrNone "merged_at") - - Expect.equal branchExists 1L "the branch's create + merge synced to B" - Expect.isSome mergedAt "the merge marked the branch merged on B" - finally - teardown insts - } - - testTask - "structural convergence: concurrent rebases of one branch converge to the LWW winner, order-independent" { - let mutable insts : List = [] - - try - let! a = seededInstance "a" - insts <- [ a ] - let! b = seededInstance "b" - insts <- [ a; b ] - - let branchId = System.Guid.NewGuid() - let baseX = - "1111111111111111111111111111111111111111111111111111111111111111" - let baseY = - "2222222222222222222222222222222222222222222222222222222222222222" - - // Both instances know the branch (shared CreateBranch, older than either rebase). Then two - // instances rebase it CONCURRENTLY to different bases: X at ts .200 (newer) beats Y at ts .100. - let createB = - branchEventAt - (PT.BranchOp.CreateBranch( - branchId, - "feature", - Some PT.mainBranchId, - None - )) - "2026-01-01T00:00:00.000Z" - let rebaseX = - branchEventAt - (PT.BranchOp.RebaseBranch(branchId, PT.Hash baseX)) - "2026-07-08T00:00:00.200Z" - let rebaseY = - branchEventAt - (PT.BranchOp.RebaseBranch(branchId, PT.Hash baseY)) - "2026-07-08T00:00:00.100Z" - - let baseOf () : Task> = - Sql.query "SELECT base_commit_hash FROM branches WHERE id = @id" - |> Sql.parameters [ "id", Sql.uuid branchId ] - |> Sql.executeRowAsync (fun read -> read.stringOrNone "base_commit_hash") - - // A authors X (newer), THEN receives Y (older) — Y must lose the LWW. - activate a - let! _ = Seed.receiveBranchOps [ createB ] - let! _ = Seed.receiveBranchOps [ rebaseX ] - let! _ = Seed.receiveBranchOps [ rebaseY ] - let! aBase = baseOf () - - // B authors Y (older) FIRST, THEN receives X (newer) — X arrives last but must still win. - activate b - let! _ = Seed.receiveBranchOps [ createB ] - let! _ = Seed.receiveBranchOps [ rebaseY ] - let! _ = Seed.receiveBranchOps [ rebaseX ] - let! bBase = baseOf () - - Expect.equal - aBase - (Some baseX) - "A: the newer rebase (ts .200 → baseX) wins; the later-arriving older one is skipped" - Expect.equal - bBase - (Some baseX) - "B: converges to the SAME base though the winner arrived last — order-independent" - finally - teardown insts - } - - // ── CLI-surface tests (drive the real `dark ` dispatch against a real store) ────────────────── - - testTask - "dark conflicts renders a real recorded conflict (regression: short-hash slice was Int32)" { - // `conflicts.dark`'s `short` did `String.slice h 0 8` with bare Int32 literals; `String.slice` - // wants `Int`, so the whole `dark conflicts` display threw a type-mismatch on ANY real conflict. - // No unit test drove the display, so it was invisible. Build a genuine cross-store conflict, then - // assert the CLI renders it (location + truncated hashes) instead of crashing. - let mutable insts : List = [] - try - let! a = seededInstance "a" - insts <- [ a ] - let! b = seededInstance "b" - insts <- [ a; b ] - let loc : PT.PackageLocation = - { owner = "Test"; modules = [ "ConflictCli" ]; name = "dup" } - activate a - let! (fnA, fnB) = twoFunctionHashes () - let! commit = existingCommit () - let! curA = currentCursor () - let! _ = - Seed.receiveOps - [] - [ setNameEvent loc fnA commit "2026-07-08T00:00:00.100Z" ] - let! (cA, eA) = wireSince curA - activate b - let! _ = - Seed.receiveOps - [] - [ setNameEvent loc fnB commit "2026-07-08T00:00:00.200Z" ] - // B (holding the later LWW winner) receives A's older op → records a conflict. - let! _ = Seed.receiveOps cA eA - let! n = conflictCountAt "Test.ConflictCli.dup" - Expect.equal n 1L "the divergence was recorded as a conflict on B" - let! state = buildCliState () - let! out = runCli state [ "conflicts" ] - // If the `short` slice regressed, `String.slice` throws and `executeFunction` returns Error → - // `runCli` fails the test outright. Reaching here (with the location rendered) is the guard. - Expect.stringContains - out - "Test.ConflictCli.dup" - "the CLI lists the diverged location instead of crashing" - finally - teardown insts - } - - testTask - "dark conflicts on a converged store reports no conflicts (the clean path)" { - let mutable insts : List = [] - try - let! a = seededInstance "a" - insts <- [ a ] - activate a - let! n = conflictCount () - Expect.equal n 0L "a freshly-seeded store has no conflicts" - let! state = buildCliState () - let! out = runCli state [ "conflicts" ] - Expect.stringContains - out - "converged" - "the clean path reports everything is converged" - finally - teardown insts - } - - testTask - "the in-process CLI driver reads the active store (dispatch + rendering work end to end)" { - // Sanity that runCli actually drives the real dispatch against the swapped store — so the tests - // above are meaningful. `version` is a pure, always-available command with stable output. - let mutable insts : List = [] - try - let! a = seededInstance "a" - insts <- [ a ] - activate a - let! state = buildCliState () - let! out = runCli state [ "version" ] - Expect.isFalse (out = "") "the CLI produced output for `version`" - finally - teardown insts - } - - testTask - "an instance can view a real seeded package item — `dark view Stdlib.Option.Option`" { - // A realistic baseline (per Stachu): the seeded store holds REAL packages, and the CLI resolves + - // renders a well-known one. Grounds the synthetic Test.* convergence scenarios in something real. - let mutable insts : List = [] - try - let! a = seededInstance "a" - insts <- [ a ] - activate a - let! state = buildCliState () - let! out = runCli state [ "view"; "Darklang.Stdlib.Option.Option" ] - Expect.stringContains - out - "Option" - "the real Option type resolves + renders" - Expect.stringContains - out - "Some" - "…and shows its cases (Some/None) — a genuine view, not an error" - let low = out.ToLower() - Expect.isFalse - (low.Contains "not found" - || low.Contains "no such" - || low.Contains "error") - "the view isn't an error banner" - finally - teardown insts - } ] + [ freshInstancesAreIsolated + branchIdentityIsGlobal + freshSchemaStoreRunsSyncPath + packageRenameConverges + deprecationConverges + crossStoreConflictConverges + bidirectionalPull + paginationBoundedBatches + resolutionConverges + resolutionSurvivesRebuild + resolutionSurvivesIncrementalFold + durableReleaseMigratesInPlace + branchMergeSyncs + concurrentRebasesConverge + darkConflictsRendersConflict + darkConflictsCleanPath + cliDriverReadsActiveStore + viewsRealSeededItem ] From 44d13b4de299d91d4129f2e46cbeb7df1700eedd Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 01:44:34 -0400 Subject: [PATCH 057/172] tests: flat root-level tests for Releases + OpsProjections Pull each inline test out to a root-level `let`, grouped in one testList at the end (house style). OpsProjections also drops now-unused aliases (PT/Inserts/BS) and the local itemHashes that duplicated the module helper. 21/21 + 7/7 green. Co-Authored-By: Claude Opus 4.8 --- backend/tests/Tests/OpsProjections.Tests.fs | 407 +++++++++---------- backend/tests/Tests/Releases.Tests.fs | 416 +++++++++++--------- 2 files changed, 415 insertions(+), 408 deletions(-) diff --git a/backend/tests/Tests/OpsProjections.Tests.fs b/backend/tests/Tests/OpsProjections.Tests.fs index db70f77051..7da23cf81a 100644 --- a/backend/tests/Tests/OpsProjections.Tests.fs +++ b/backend/tests/Tests/OpsProjections.Tests.fs @@ -1,7 +1,5 @@ -/// Tests for LibDB.Seed.rebuildProjections. -/// Proves the projection tables are -/// *regenerable from the op log* — drop them, re-fold package_ops, and they -/// come back identical. The op log (package_ops) is canonical and untouched. +/// Tests for LibDB.Seed.rebuildProjections: the projection tables are *regenerable from the op log* — drop +/// them, re-fold package_ops, and they come back identical. The op log (package_ops) is canonical, untouched. module Tests.OpsProjections open Expecto @@ -16,17 +14,14 @@ open LibDB.Sqlite module Seed = LibDB.Seed module Releases = LibDB.Releases -module PT = LibExecution.ProgramTypes -module Inserts = LibDB.Inserts -module BS = LibSerialization.Binary.Serialization let private countRows (table : string) : Task = Sql.query $"SELECT COUNT(*) as n FROM {table}" |> Sql.executeRowAsync (fun read -> read.int64 "n") /// A content fingerprint of the projections: the sorted set of every projected item's hash. Two folds that -/// produce the same fingerprint produced the same projections (down to identity), regardless of row order -/// or nondeterministic columns like `location_id`. +/// produce the same fingerprint produced the same projections (down to identity), regardless of row order or +/// nondeterministic columns like `location_id`. let private itemHashes () : Task = task { let q (table : string) = @@ -38,222 +33,196 @@ let private itemHashes () : Task = return String.concat "\n" (fns @ typs @ vals) } -// `testSequenced` because the drop+rebuild case DELETEs + refolds the *shared* projection -// tables and marks all ops unapplied — it must not run concurrently with other DB tests (it -// would race their reads/writes mid-rebuild). The registry cases are pure but ride along. -let tests = - testSequenced - <| testList - "OpsProjections" - [ testTask - "rebuildProjections deterministically regenerates projections from the op log" { - // package_blobs is canonical content — a rebuild must never touch it - let! blobsBefore = countRows "package_blobs" - - // drop the regenerable projections + re-fold the entire op log - let! reapplied = Seed.rebuildProjections () - Expect.isTrue (reapplied > 0L) "ops were re-folded" - let! fns1 = countRows "package_functions" - let! locs1 = countRows "locations" - Expect.isTrue - (fns1 > 0L) - "projections regenerated (non-empty) from the op log" - - // a SECOND rebuild reproduces the EXACT same projections — the rebuild is a deterministic - // function of the op log. (Robust to other tests mutating the shared DB: we compare two - // rebuilds of the *current* log, not a pristine-seed count they'd perturb.) - let! _ = Seed.rebuildProjections () - let! fns2 = countRows "package_functions" - let! locs2 = countRows "locations" - Expect.equal - fns2 - fns1 - "package_functions: a re-rebuild reproduces the same projection" - Expect.equal - locs2 - locs1 - "locations: a re-rebuild reproduces the same projection" - - // canonical content (package_blobs) is NOT a projection — untouched across rebuilds - let! blobsAfter = countRows "package_blobs" - Expect.equal - blobsAfter - blobsBefore - "package_blobs (canonical content) preserved, not dropped" - } - - // Stronger than the count check above: the exact CONTENT of the projections (the set of projected - // item hashes) is reproduced byte-for-byte across a re-fold — the fold is a deterministic function - // of the op log, not merely cardinality-preserving. This is what makes "drop the projections and - // re-fold" safe, and (later) what lets two instances fold the same log to the same tables. - testTask - "re-fold reproduces identical projection CONTENT (deterministic fold, not just counts)" { - let itemHashes () : Task = - task { - let q (table : string) = - Sql.query $"SELECT hash FROM {table} ORDER BY hash" - |> Sql.executeAsync (fun read -> read.string "hash") - let! fns = q "package_functions" - let! typs = q "package_types" - let! vals = q "package_values" - return String.concat "\n" (fns @ typs @ vals) - } - - let! _ = Seed.rebuildProjections () - let! fp1 = itemHashes () - Expect.isTrue - (String.length fp1 > 0) - "non-vacuous: the projections have content" - let! _ = Seed.rebuildProjections () - let! fp2 = itemHashes () - Expect.equal - fp2 - fp1 - "the exact set of projected item hashes is identical across a re-fold (deterministic fold)" - } - - // The authoring stamp behind the timestamp-LWW: locally-inserted ops must get a STRICTLY-increasing - // origin_ts, even within one wall-clock millisecond — otherwise two sequential SetNames to the same - // name would tie and be reordered by content hash (a later edit could lose its own location). - test - "origin_ts stamps are strictly increasing (sequential local edits never tie the LWW)" { - let stamps = List.init 100 (fun _ -> LibDB.Inserts.nextOriginTs ()) - Expect.equal - stamps - (List.sort stamps) - "stamps are monotonic (non-decreasing)" - Expect.equal - (List.length (List.distinct stamps)) - 100 - "stamps are strictly distinct — no ties even across a burst within one millisecond" - } - - // ── THE POINT, end to end: migrate a store from one Release of Dark to the next WITHOUT losing - // authored work. A *durable* Release step carries the op log forward (a schema copy-swap + an optional - // op-format re-serialize); the projections are then dropped and RE-FOLDED from that same log in the - // new Release's format. This is exactly why the two design pieces exist: - // • the op log is canonical — you migrate the LOG (the authored work), never the derived tables; the - // projections are disposable and regenerated. Losing a projection costs only CPU. - // • meaning-stable hashing — a format re-serialize keeps each op's IDENTITY (the id hashes the op's - // MEANING, not its bytes), so names/dependencies don't churn across the migration. - // (Contrast the shipped Release 3, a clean-BREAK that throws the package data away and rebuilds — this - // test proves the DURABLE path that carries it forward, the one a real future release will use.) ── - testTask - "release migration (durable): authored op log carried forward + projections re-folded, nothing lost" { - let! opsBefore = countRows "package_ops" - let! blobsBefore = countRows "package_blobs" - Expect.isTrue - (opsBefore > 0L) - "there is authored work to migrate (not a vacuous test)" - let! fpBefore = itemHashes () - // A durable forward Release step (n = code+1): a real schema change (the index below) that runs the - // reserialize branch of applyRelease (NOT clearForRebuild) — so the authored op log is preserved and - // carried forward, then re-folded. What this asserts: nothing is LOST across a durable release (op-log - // count, blobs, and the re-folded projections all survive identically). - // CLEANUP(reserialize-test): the remap is identity because `reserialize : byte[] -> byte[]` doesn't get - // the op id, so a genuine deserialize→re-encode can't be driven here. A real byte-changing-but-meaning- - // stable test needs the id threaded into reserialize; until then this exercises the path, not the transform. - Releases.applyRelease - { n = Releases.currentRelease + 1 - sql = - "CREATE INDEX IF NOT EXISTS idx_release_migration_demo ON package_ops(origin_ts)" - reserialize = Some(fun blob -> blob) - clearForRebuild = false } - // the step marked the log unapplied; startup re-folds the projections from the (carried-forward) log - let! _ = Seed.rebuildProjections () +let rebuildIsDeterministic = + testTask + "rebuildProjections deterministically regenerates projections from the op log" { + // package_blobs is canonical content — a rebuild must never touch it + let! blobsBefore = countRows "package_blobs" + + // drop the regenerable projections + re-fold the entire op log + let! reapplied = Seed.rebuildProjections () + Expect.isTrue (reapplied > 0L) "ops were re-folded" + let! fns1 = countRows "package_functions" + let! locs1 = countRows "locations" + Expect.isTrue (fns1 > 0L) "projections regenerated (non-empty) from the op log" + + // a SECOND rebuild reproduces the EXACT same projections — the rebuild is a deterministic function of the + // op log. (Robust to other tests mutating the shared DB: we compare two rebuilds of the *current* log.) + let! _ = Seed.rebuildProjections () + let! fns2 = countRows "package_functions" + let! locs2 = countRows "locations" + Expect.equal + fns2 + fns1 + "package_functions: a re-rebuild reproduces the same projection" + Expect.equal locs2 locs1 "locations: a re-rebuild reproduces the same projection" + + // canonical content (package_blobs) is NOT a projection — untouched across rebuilds + let! blobsAfter = countRows "package_blobs" + Expect.equal + blobsAfter + blobsBefore + "package_blobs (canonical content) preserved, not dropped" + } - let! opsAfter = countRows "package_ops" - let! blobsAfter = countRows "package_blobs" - let! fpAfter = itemHashes () - Expect.equal - opsAfter - opsBefore - "the authored op log is PRESERVED across the migration — nothing lost" - Expect.equal - blobsAfter - blobsBefore - "canonical content (package_blobs) preserved" - Expect.equal - fpAfter - fpBefore - "projections re-fold IDENTICALLY in the new Release — same items, meaning-stable" +let refoldReproducesContent = + // Stronger than the count check above: the exact CONTENT of the projections (the set of projected item + // hashes) is reproduced across a re-fold — the fold is a deterministic function of the op log, not merely + // cardinality-preserving. This is what makes "drop the projections and re-fold" safe. + testTask + "re-fold reproduces identical projection CONTENT (deterministic fold, not just counts)" { + let! _ = Seed.rebuildProjections () + let! fp1 = itemHashes () + Expect.isTrue (String.length fp1 > 0) "non-vacuous: the projections have content" + let! _ = Seed.rebuildProjections () + let! fp2 = itemHashes () + Expect.equal + fp2 + fp1 + "the exact set of projected item hashes is identical across a re-fold" + } - let! idxExists = - Sql.query - "SELECT COUNT(*) as n FROM sqlite_master WHERE type='index' AND name='idx_release_migration_demo'" - |> Sql.executeRowAsync (fun read -> read.int64 "n") - Expect.equal idxExists 1L "the Release's schema change actually landed" +let originTsStrictlyIncreasing = + // The authoring stamp behind the timestamp-LWW: locally-inserted ops must get a STRICTLY-increasing + // origin_ts, even within one wall-clock millisecond — otherwise two sequential SetNames to the same name + // would tie and be reordered by content hash (a later edit could lose its own location). + test + "origin_ts stamps are strictly increasing (sequential local edits never tie the LWW)" { + let stamps = List.init 100 (fun _ -> LibDB.Inserts.nextOriginTs ()) + Expect.equal stamps (List.sort stamps) "stamps are monotonic (non-decreasing)" + Expect.equal + (List.length (List.distinct stamps)) + 100 + "stamps are strictly distinct — no ties even across a burst within one millisecond" + } - // leave the shared store as we found it - do! - Sql.query "DROP INDEX IF EXISTS idx_release_migration_demo" - |> Sql.executeStatementAsync - } +let durableReleaseCarriesForward = + // THE POINT, end to end: migrate a store from one Release to the next WITHOUT losing authored work. A + // durable Release step carries the op log forward (a schema copy-swap + an optional op-format re-serialize); + // the projections are then dropped and RE-FOLDED from that same log in the new format. The op log is + // canonical — you migrate the LOG, never the derived tables; and meaning-stable hashing keeps each op's + // identity across a re-serialize. (Contrast the shipped Release 3, a clean-BREAK; this proves the DURABLE + // path a real future release will use.) + testTask + "release migration (durable): authored op log carried forward + projections re-folded, nothing lost" { + let! opsBefore = countRows "package_ops" + let! blobsBefore = countRows "package_blobs" + Expect.isTrue + (opsBefore > 0L) + "there is authored work to migrate (not a vacuous test)" + let! fpBefore = itemHashes () + + // A durable forward Release step (n = code+1): a real schema change that runs the reserialize branch of + // applyRelease (NOT clearForRebuild) — so the authored op log is preserved, carried forward, re-folded. + // CLEANUP(reserialize-test): the remap is identity because `reserialize : byte[] -> byte[]` doesn't get the + // op id, so a genuine deserialize→re-encode can't be driven here — this exercises the path, not the transform. + Releases.applyRelease + { n = Releases.currentRelease + 1 + sql = + "CREATE INDEX IF NOT EXISTS idx_release_migration_demo ON package_ops(origin_ts)" + reserialize = Some(fun blob -> blob) + clearForRebuild = false } + // the step marked the log unapplied; startup re-folds the projections from the (carried-forward) log + let! _ = Seed.rebuildProjections () + + let! opsAfter = countRows "package_ops" + let! blobsAfter = countRows "package_blobs" + let! fpAfter = itemHashes () + Expect.equal + opsAfter + opsBefore + "the authored op log is PRESERVED across the migration — nothing lost" + Expect.equal blobsAfter blobsBefore "canonical content (package_blobs) preserved" + Expect.equal + fpAfter + fpBefore + "projections re-fold IDENTICALLY in the new Release — same items" + + let! idxExists = + Sql.query + "SELECT COUNT(*) as n FROM sqlite_master WHERE type='index' AND name='idx_release_migration_demo'" + |> Sql.executeRowAsync (fun read -> read.int64 "n") + Expect.equal idxExists 1L "the Release's schema change actually landed" + + // leave the shared store as we found it + do! + Sql.query "DROP INDEX IF EXISTS idx_release_migration_demo" + |> Sql.executeStatementAsync + } - // the projection registry — the fold/dirty descriptors - test "the projection registry covers exactly the 6 regenerable projections" { - Expect.equal - (List.sort Seed.projectionTables) - (List.sort - [ "package_functions" - "package_types" - "package_values" - "locations" - "package_dependencies" - "deprecations" ]) - "the registry's tables are exactly Seed.export's stripped projections (incl. deprecations)" - } +let registryCoversProjections = + test "the projection registry covers exactly the 6 regenerable projections" { + Expect.equal + (List.sort Seed.projectionTables) + (List.sort + [ "package_functions" + "package_types" + "package_values" + "locations" + "package_dependencies" + "deprecations" ]) + "the registry's tables are exactly Seed.export's stripped projections (incl. deprecations)" + } - // A schema change keeps your work. The bootstrap drops ONLY `projectionTables` and re-folds the op - // log (LocalExec.Migrations.dropProjectionTables) — so the authored, canonical data must NEVER appear - // in that drop-set. If it did, a schema bump would delete your work. This guards that line. - test - "a schema change never drops the op log: no canonical table is in the projection drop-set" { - let canonical = - [ "package_ops" // the authored op log — the truth - "package_blobs" // canonical content (op-playback never writes it) - "branches" - "commits" - "branch_ops" - "accounts_v0" - "user_data_v0" - "toplevels_v0" - "scripts_v0" - "sync_remotes" - "sync_cursors" - "sync_conflicts" ] - canonical - |> List.iter (fun t -> - Expect.isFalse - (List.contains t Seed.projectionTables) - $"{t} is canonical and must NOT be in the projection drop-set (it would be lost on a schema change)") - } +let noCanonicalInDropSet = + // A schema change keeps your work: the bootstrap drops ONLY `projectionTables` and re-folds the op log, so + // the authored, canonical data must NEVER appear in that drop-set. If it did, a schema bump would delete it. + test + "a schema change never drops the op log: no canonical table is in the projection drop-set" { + let canonical = + [ "package_ops" // the authored op log — the truth + "package_blobs" // canonical content (op-playback never writes it) + "branches" + "commits" + "branch_ops" + "accounts_v0" + "user_data_v0" + "toplevels_v0" + "scripts_v0" + "sync_remotes" + "sync_cursors" + "sync_conflicts" ] + canonical + |> List.iter (fun t -> + Expect.isFalse + (List.contains t Seed.projectionTables) + $"{t} is canonical and must NOT be in the projection drop-set (it would be lost on a schema change)") + } - // A schema change keeps your work, end to end. A schema change now runs `rebuildProjections` (drop - // projections + re-fold), exactly what this exercises. The first test pins projection-regen + blobs; - // this pins the thing that actually matters — your authored op LOG (and branch/commit state) come - // through a full re-fold IDENTICAL. If this regresses, a schema bump is eating real work. - testTask "a schema change keeps your work: a full re-fold preserves the op log" { - let! opsBefore = countRows "package_ops" - let! branchesBefore = countRows "branches" - let! commitsBefore = countRows "commits" - Expect.isTrue - (opsBefore > 0L) - "there are ops to preserve (not a vacuous test)" +let schemaChangeKeepsWork = + // A schema change now runs `rebuildProjections` (drop projections + re-fold). This pins the thing that + // matters — your authored op LOG (and branch/commit state) come through a full re-fold IDENTICAL. + testTask "a schema change keeps your work: a full re-fold preserves the op log" { + let! opsBefore = countRows "package_ops" + let! branchesBefore = countRows "branches" + let! commitsBefore = countRows "commits" + Expect.isTrue (opsBefore > 0L) "there are ops to preserve (not a vacuous test)" + + let! _ = Seed.rebuildProjections () + + let! opsAfter = countRows "package_ops" + let! branchesAfter = countRows "branches" + let! commitsAfter = countRows "commits" + Expect.equal + opsAfter + opsBefore + "package_ops (the authored op log) is untouched by a re-fold" + Expect.equal branchesAfter branchesBefore "branches preserved across a re-fold" + Expect.equal commitsAfter commitsBefore "commits preserved across a re-fold" + } - let! _ = Seed.rebuildProjections () - let! opsAfter = countRows "package_ops" - let! branchesAfter = countRows "branches" - let! commitsAfter = countRows "commits" - Expect.equal - opsAfter - opsBefore - "package_ops (the authored op log) is untouched by a re-fold" - Expect.equal - branchesAfter - branchesBefore - "branches preserved across a re-fold" - Expect.equal commitsAfter commitsBefore "commits preserved across a re-fold" - } ] +// testSequenced because the rebuild cases DELETE + refold the *shared* projection tables and mark all ops +// unapplied — they must not race other DB tests' reads/writes mid-rebuild. The pure cases ride along. +let tests = + testSequenced + <| testList + "OpsProjections" + [ rebuildIsDeterministic + refoldReproducesContent + originTsStrictlyIncreasing + durableReleaseCarriesForward + registryCoversProjections + noCanonicalInDropSet + schemaChangeKeepsWork ] diff --git a/backend/tests/Tests/Releases.Tests.fs b/backend/tests/Tests/Releases.Tests.fs index cb0b81423c..3ebaf84f36 100644 --- a/backend/tests/Tests/Releases.Tests.fs +++ b/backend/tests/Tests/Releases.Tests.fs @@ -20,195 +20,233 @@ let private step (n : int) : Releases.Release = let private cleanBreakStep (n : int) : Releases.Release = { n = n; sql = ""; reserialize = None; clearForRebuild = true } + +let pendingReleasesEmpty = + test "pendingReleases: an empty registry never has anything to apply" { + Expect.isEmpty (Releases.pendingReleases [] 1 5) "empty registry → no steps" + } + +let pendingReleasesRange = + test "pendingReleases: returns exactly the steps in (storeN, codeN], ascending" { + let registry = [ step 4; step 2; step 3; step 5 ] // deliberately unsorted + Expect.equal + (Releases.pendingReleases registry 2 5 |> List.map (fun r -> r.n)) + [ 3; 4; 5 ] + "store 2 → code 5 applies 3,4,5 in order" + Expect.equal + (Releases.pendingReleases registry 3 4 |> List.map (fun r -> r.n)) + [ 4 ] + "store 3 → code 4 applies only 4" + } + +let pendingReleasesNoneWhenCurrent = + test "pendingReleases: nothing to do when the store is already at the code Release" { + let registry = [ step 2; step 3 ] + Expect.isEmpty + (Releases.pendingReleases registry 3 3) + "store == code → no steps (the common steady state)" + } + +let pendingReleasesSkipsApplied = + test "pendingReleases: a step at or below the store Release is never re-applied" { + let registry = [ step 2; step 3; step 4 ] + Expect.equal + (Releases.pendingReleases registry 3 4 |> List.map (fun r -> r.n)) + [ 4 ] + "already-applied steps (<= storeN) are excluded" + } + +let registryWellFormed = + test + "registryIsWellFormed: a contiguous, distinct, in-range registry is well-formed" { + Expect.isTrue + (Releases.registryIsWellFormed [ step 2; step 3; step 4 ] 4) + "2,3,4 with code 4 is well-formed" + Expect.isTrue + (Releases.registryIsWellFormed [] 2) + "an empty registry is well-formed" + } + +let registryRejectsGap = + test "registryIsWellFormed: a GAP is rejected (it would silently skip a migration)" { + Expect.isFalse + (Releases.registryIsWellFormed [ step 2; step 4 ] 4) + "2 then 4 (missing 3) is not well-formed" + } + +let registryRejectsDuplicate = + test "registryIsWellFormed: a DUPLICATE is rejected (it would double-apply)" { + Expect.isFalse + (Releases.registryIsWellFormed [ step 2; step 3; step 3 ] 3) + "a repeated Release number is not well-formed" + } + +let registryRejectsAboveCode = + test + "registryIsWellFormed: a step ABOVE the code Release is rejected (unreachable)" { + Expect.isFalse + (Releases.registryIsWellFormed [ step 2; step 3 ] 2) + "a step at Release 3 when the code speaks only 2 is not well-formed" + } + +let shippedRegistryWellFormed = + // The guard that protects the shipped registry: whatever steps exist must be well-formed against the + // Release this binary speaks. `applyPending` asserts this at boot; pin it here too so a malformed registry + // fails in CI, not on someone's machine at startup. + test + "the shipped Release registry is well-formed against the code's current Release" { + Expect.isTrue + (Releases.registryIsWellFormed Releases.releases Releases.currentRelease) + "LibDB.Releases.releases is contiguous/distinct and none above the current Release" + } + +let release3IsCleanBreak = + test "Release 3 is the shipped meaning-stable-hashing clean-break step" { + match Releases.releases |> List.tryFind (fun r -> r.n = 3) with + | Some r -> + Expect.isTrue + r.clearForRebuild + "Release 3 is a clean-break (clearForRebuild) — pre-v3 data is disposable, rebuilt from source" + | None -> failtest "expected a Release 3 entry in the shipped registry" + } + +let v2UpgradesToCurrent = + test "a v2 store upgrades to the current Release via the shipped steps" { + let steps = + Releases.pendingReleases Releases.releases 2 Releases.currentRelease + |> List.map (fun r -> r.n) + Expect.equal + steps + [ 3 ] + "store 2 → code 3 applies exactly Release 3 (the clean-break)" + } + +// planRelease — the boot-guard DECISION, pure so the refuse-newer safety property is unit-tested without +// mutating the store. ReleaseAction carries a Release (which holds a function), so it has no structural +// equality — we match instead of Expect.equal. + +let planReleaseStampFresh = + test "planRelease: no stored Release → StampFresh (fresh or pre-tracking store)" { + match Releases.planRelease [ step 3 ] None 3 with + | Releases.StampFresh -> () + | other -> failtest $"expected StampFresh, got %A{other}" + } + +let planReleaseUpToDate = + test "planRelease: store == code → UpToDate (the steady state)" { + match Releases.planRelease [ step 3 ] (Some 3) 3 with + | Releases.UpToDate -> () + | other -> failtest $"expected UpToDate, got %A{other}" + } + +let planReleaseRefuseNewer = + test + "planRelease: store > code → RefuseNewer (never open a newer store with older code)" { + match Releases.planRelease [ step 3 ] (Some 5) 3 with + | Releases.RefuseNewer s -> + Expect.equal s 5 "refuses, reporting the store's Release" + | other -> failtest $"expected RefuseNewer 5, got %A{other}" + } + +let planReleaseMigrate = + test "planRelease: store < code → Migrate the pending steps, in order" { + match Releases.planRelease [ step 2; step 3; step 4 ] (Some 2) 4 with + | Releases.Migrate steps -> + Expect.equal + (steps |> List.map (fun r -> r.n)) + [ 3; 4 ] + "store 2 → code 4 migrates exactly 3,4 ascending" + | other -> failtest $"expected Migrate [3;4], got %A{other}" + } + +// planCliUpgrade — the CLI's data-preserving vs re-seed decision, layered on planRelease. Pure, so the +// "durable migrates in place / clean-break re-seeds / newer refuses" policy is pinned without a store. + +let planCliUpgradeProceed = + test "planCliUpgrade: store == code → Proceed" { + Expect.equal + (Releases.planCliUpgrade [ step 3 ] (Some 3) 3) + Releases.CliUpgrade.Proceed + "already current → nothing to do" + } + +let planCliUpgradeRefuseNewer = + test "planCliUpgrade: store > code → RefuseNewer (older code must not open it)" { + Expect.equal + (Releases.planCliUpgrade [ step 3 ] (Some 5) 3) + (Releases.CliUpgrade.RefuseNewer 5) + "a newer store is refused, reporting its Release" + } + +let planCliUpgradeMigrateInPlace = + test "planCliUpgrade: all-durable pending steps → MigrateInPlace (data preserved)" { + Expect.equal + (Releases.planCliUpgrade [ step 2; step 3; step 4 ] (Some 2) 4) + Releases.CliUpgrade.MigrateInPlace + "durable-only migration runs in place and keeps the store" + } + +let planCliUpgradeReseedOnCleanBreak = + test + "planCliUpgrade: any pending clean-break step → Reseed (content can't migrate in place)" { + Expect.equal + (Releases.planCliUpgrade [ step 2; cleanBreakStep 3; step 4 ] (Some 2) 4) + Releases.CliUpgrade.Reseed + "a clean break anywhere in the pending range forces a re-seed" + } + +let planCliUpgradeReseedPreTracking = + test "planCliUpgrade: pre-tracking store (no stamp) → Reseed (unknown format)" { + Expect.equal + (Releases.planCliUpgrade [ step 3 ] None 3) + Releases.CliUpgrade.Reseed + "the CLI can't trust an unstamped store's on-disk format → re-seed" + } + +let applyPendingRefusesNewer = + // The boot guard end-to-end over the real store (the pure decision is tested above; this exercises + // writeRelease → storedRelease → applyPending against the DB). We stamp the store NEWER than the code and + // confirm applyPending refuses. We only exercise the REFUSE path — it raises before any migration runs, so + // it's non-destructive; a real forward step would execute the Release-3 clean-break and wipe the shared + // test DB. try/finally restores the stamp (the store was born at currentRelease, so it's a no-op). + test + "applyPending refuses a store stamped at a NEWER Release (boot guard, over the DB)" { + let cur = Releases.currentRelease + try + Releases.writeRelease (cur + 1) + Expect.equal + (Releases.storedRelease ()) + (Some(cur + 1)) + "store stamped one Release newer than the code" + Expect.throws + (fun () -> Releases.applyPending cur) + "older code must refuse to open a store from a newer Release" + finally + Releases.writeRelease cur + } + + let tests = testList "Releases" - [ test "pendingReleases: an empty registry never has anything to apply" { - Expect.isEmpty (Releases.pendingReleases [] 1 5) "empty registry → no steps" - } - - test "pendingReleases: returns exactly the steps in (storeN, codeN], ascending" { - let registry = [ step 4; step 2; step 3; step 5 ] // deliberately unsorted - Expect.equal - (Releases.pendingReleases registry 2 5 |> List.map (fun r -> r.n)) - [ 3; 4; 5 ] - "store 2 → code 5 applies 3,4,5 in order" - Expect.equal - (Releases.pendingReleases registry 3 4 |> List.map (fun r -> r.n)) - [ 4 ] - "store 3 → code 4 applies only 4" - } - - test - "pendingReleases: nothing to do when the store is already at the code Release" { - let registry = [ step 2; step 3 ] - Expect.isEmpty - (Releases.pendingReleases registry 3 3) - "store == code → no steps (the common steady state)" - } - - test - "pendingReleases: a step at or below the store Release is never re-applied" { - let registry = [ step 2; step 3; step 4 ] - Expect.equal - (Releases.pendingReleases registry 3 4 |> List.map (fun r -> r.n)) - [ 4 ] - "already-applied steps (<= storeN) are excluded" - } - - test - "registryIsWellFormed: a contiguous, distinct, in-range registry is well-formed" { - Expect.isTrue - (Releases.registryIsWellFormed [ step 2; step 3; step 4 ] 4) - "2,3,4 with code 4 is well-formed" - Expect.isTrue - (Releases.registryIsWellFormed [] 2) - "an empty registry is well-formed" - } - - test - "registryIsWellFormed: a GAP is rejected (it would silently skip a migration)" { - Expect.isFalse - (Releases.registryIsWellFormed [ step 2; step 4 ] 4) - "2 then 4 (missing 3) is not well-formed" - } - - test "registryIsWellFormed: a DUPLICATE is rejected (it would double-apply)" { - Expect.isFalse - (Releases.registryIsWellFormed [ step 2; step 3; step 3 ] 3) - "a repeated Release number is not well-formed" - } - - test - "registryIsWellFormed: a step ABOVE the code Release is rejected (unreachable)" { - Expect.isFalse - (Releases.registryIsWellFormed [ step 2; step 3 ] 2) - "a step at Release 3 when the code speaks only 2 is not well-formed" - } - - // The guard that protects the shipped registry: whatever steps exist must be well-formed against - // the Release this binary actually speaks. `applyPending` asserts this at boot; pin it here too so - // a malformed registry fails in CI, not on someone's machine at startup. - test - "the shipped Release registry is well-formed against the code's current Release" { - Expect.isTrue - (Releases.registryIsWellFormed Releases.releases Releases.currentRelease) - "LibDB.Releases.releases is contiguous/distinct and none above wireFormatVersion" - } - - // Release 3 (meaning-stable hashing) is the first real step, and it's a clean-break boundary. - test "Release 3 is the shipped meaning-stable-hashing clean-break step" { - match Releases.releases |> List.tryFind (fun r -> r.n = 3) with - | Some r -> - Expect.isTrue - r.clearForRebuild - "Release 3 is a clean-break (clearForRebuild) — pre-v3 data is disposable, rebuilt from source" - | None -> failtest "expected a Release 3 entry in the shipped registry" - } - - // a v2 store upgrades to the current code Release via exactly the shipped steps (here: just 3). - test "a v2 store upgrades to the current Release via the shipped steps" { - let steps = - Releases.pendingReleases Releases.releases 2 Releases.currentRelease - |> List.map (fun r -> r.n) - Expect.equal - steps - [ 3 ] - "store 2 → code 3 applies exactly Release 3 (the clean-break)" - } - - // planRelease — the boot-guard DECISION, pure so the refuse-newer safety property is unit-tested - // without mutating the store. (applyPending wraps it with the DB read/write; its DB half runs at - // every suite startup.) ReleaseAction carries a Release (which holds a function), so it has no - // structural equality — we match instead of Expect.equal. - test - "planRelease: no stored Release → StampFresh (fresh or pre-tracking store)" { - match Releases.planRelease [ step 3 ] None 3 with - | Releases.StampFresh -> () - | other -> failtest $"expected StampFresh, got %A{other}" - } - - test "planRelease: store == code → UpToDate (the steady state)" { - match Releases.planRelease [ step 3 ] (Some 3) 3 with - | Releases.UpToDate -> () - | other -> failtest $"expected UpToDate, got %A{other}" - } - - test - "planRelease: store > code → RefuseNewer (never open a newer store with older code)" { - match Releases.planRelease [ step 3 ] (Some 5) 3 with - | Releases.RefuseNewer s -> - Expect.equal s 5 "refuses, reporting the store's Release" - | other -> failtest $"expected RefuseNewer 5, got %A{other}" - } - - test "planRelease: store < code → Migrate the pending steps, in order" { - match Releases.planRelease [ step 2; step 3; step 4 ] (Some 2) 4 with - | Releases.Migrate steps -> - Expect.equal - (steps |> List.map (fun r -> r.n)) - [ 3; 4 ] - "store 2 → code 4 migrates exactly 3,4 ascending" - | other -> failtest $"expected Migrate [3;4], got %A{other}" - } - - // planCliUpgrade — the CLI's data-preserving vs re-seed decision, layered on planRelease. Pure, so the - // "durable migrates in place / clean-break re-seeds / newer refuses" policy is pinned without a store. - test "planCliUpgrade: store == code → Proceed" { - Expect.equal - (Releases.planCliUpgrade [ step 3 ] (Some 3) 3) - Releases.CliUpgrade.Proceed - "already current → nothing to do" - } - - test "planCliUpgrade: store > code → RefuseNewer (older code must not open it)" { - Expect.equal - (Releases.planCliUpgrade [ step 3 ] (Some 5) 3) - (Releases.CliUpgrade.RefuseNewer 5) - "a newer store is refused, reporting its Release" - } - - test - "planCliUpgrade: all-durable pending steps → MigrateInPlace (data preserved)" { - Expect.equal - (Releases.planCliUpgrade [ step 2; step 3; step 4 ] (Some 2) 4) - Releases.CliUpgrade.MigrateInPlace - "durable-only migration runs in place and keeps the store" - } - - test - "planCliUpgrade: any pending clean-break step → Reseed (content can't migrate in place)" { - Expect.equal - (Releases.planCliUpgrade [ step 2; cleanBreakStep 3; step 4 ] (Some 2) 4) - Releases.CliUpgrade.Reseed - "a clean break anywhere in the pending range forces a re-seed" - } - - test "planCliUpgrade: pre-tracking store (no stamp) → Reseed (unknown format)" { - Expect.equal - (Releases.planCliUpgrade [ step 3 ] None 3) - Releases.CliUpgrade.Reseed - "the CLI can't trust an unstamped store's on-disk format → re-seed" - } - - // The boot guard end-to-end over the real store (the pure decision is tested above; this exercises - // writeRelease → storedRelease → applyPending against the DB). We stamp the store NEWER than the code - // and confirm applyPending refuses to open it. We only exercise the REFUSE path — it raises before any - // migration runs, so it's non-destructive; running a real forward step would execute the Release-3 - // clean-break and wipe the shared test DB. try/finally restores the stamp so the rest of the suite is - // unaffected (the store was born at currentRelease, so restoring to it is a no-op). - test - "applyPending refuses a store stamped at a NEWER Release (boot guard, over the DB)" { - let cur = Releases.currentRelease - try - Releases.writeRelease (cur + 1) - Expect.equal - (Releases.storedRelease ()) - (Some(cur + 1)) - "store stamped one Release newer than the code" - Expect.throws - (fun () -> Releases.applyPending cur) - "older code must refuse to open a store from a newer Release" - finally - Releases.writeRelease cur - } ] + [ pendingReleasesEmpty + pendingReleasesRange + pendingReleasesNoneWhenCurrent + pendingReleasesSkipsApplied + registryWellFormed + registryRejectsGap + registryRejectsDuplicate + registryRejectsAboveCode + shippedRegistryWellFormed + release3IsCleanBreak + v2UpgradesToCurrent + planReleaseStampFresh + planReleaseUpToDate + planReleaseRefuseNewer + planReleaseMigrate + planCliUpgradeProceed + planCliUpgradeRefuseNewer + planCliUpgradeMigrateInPlace + planCliUpgradeReseedOnCleanBreak + planCliUpgradeReseedPreTracking + applyPendingRefusesNewer ] From bcafb181ae86d031b762f8cfd1066942aa6d5428 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 01:49:17 -0400 Subject: [PATCH 058/172] tests: flat root-level tests for SyncScenarios Pull the 6 inline tests out to root-level lets grouped in one testList (house style). Bodies unchanged. Co-Authored-By: Claude Opus 4.8 --- backend/tests/Tests/SyncScenarios.Tests.fs | 509 +++++++++++---------- 1 file changed, 258 insertions(+), 251 deletions(-) diff --git a/backend/tests/Tests/SyncScenarios.Tests.fs b/backend/tests/Tests/SyncScenarios.Tests.fs index 55f28cd97c..756b2fb170 100644 --- a/backend/tests/Tests/SyncScenarios.Tests.fs +++ b/backend/tests/Tests/SyncScenarios.Tests.fs @@ -119,263 +119,270 @@ let private setNameEventOn let opId = Inserts.computeOpHash op (opId, BS.PT.PackageOp.serialize opId op, branchId, commitHash, ts) -let tests = - testSequenced - <| testList - "SyncScenarios" - [ // CONVERGENCE — the core guarantee: concurrent edits to the SAME name settle on the same winner no - // matter which instance's op arrives first. (origin_ts LWW: newer wins; older is skipped on replay.) - testTask - "convergence: concurrent SetName to one name is order-independent (LWW)" { - let! (hA, hB) = twoFns () - let! commitHash = aCommit () - let loc : PT.PackageLocation = - { owner = "Test"; modules = [ "SyncConv" ]; name = "x" } - let evOld = setNameEvent loc hA commitHash "2099-01-01T00:00:00.100Z" - let evNew = setNameEvent loc hB commitHash "2099-01-01T00:00:00.200Z" - let (idA, _, _, _, _) = evOld - let (idB, _, _, _, _) = evNew - let ids = [ idA; idB ] - - // order 1: old then new - do! wipe loc ids - let! _ = recv evOld - let! _ = recv evNew - let! r1 = liveHash loc - - // order 2: new then old (the older op arrives late — must be skipped, not win) - do! wipe loc ids - let! _ = recv evNew - let! _ = recv evOld - let! r2 = liveHash loc - - Expect.equal r1 [ hB ] "old→new converges to the newer hash" - Expect.equal - r2 - [ hB ] - "new→old ALSO converges to the newer hash (late older op skipped)" - Expect.equal - r1 - r2 - "order-independent — the two-instance convergence property" - - do! wipe loc ids - let! _ = Seed.rebuildProjections () - () - } - // IDEMPOTENCY — re-receiving the same op set changes nothing and folds 0 (so "Pulled N" stays honest and - // a re-pull can't corrupt the binding). - testTask - "idempotency: re-receiving the same op folds 0 and leaves the binding unchanged" { - let! (hA, _) = twoFns () - let! commitHash = aCommit () - let loc : PT.PackageLocation = - { owner = "Test"; modules = [ "SyncIdem" ]; name = "y" } - let ev = setNameEvent loc hA commitHash "2099-01-01T00:00:00.300Z" - let (idA, _, _, _, _) = ev - do! wipe loc [ idA ] - - let! first = recv ev - let! second = recv ev - let! bound = liveHash loc - Expect.isTrue (first >= 1L) "first receive folds the new op" - Expect.equal second 0L "re-receiving the identical op folds nothing" - Expect.equal bound [ hA ] "binding unchanged after the re-pull" - - do! wipe loc [ idA ] - let! _ = Seed.rebuildProjections () - () - } +let convergenceOrderIndependent = + // CONVERGENCE — the core guarantee: concurrent edits to the SAME name settle on the same winner no matter + // which instance's op arrives first. (origin_ts LWW: newer wins; older is skipped on replay.) + testTask "convergence: concurrent SetName to one name is order-independent (LWW)" { + let! (hA, hB) = twoFns () + let! commitHash = aCommit () + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "SyncConv" ]; name = "x" } + let evOld = setNameEvent loc hA commitHash "2099-01-01T00:00:00.100Z" + let evNew = setNameEvent loc hB commitHash "2099-01-01T00:00:00.200Z" + let (idA, _, _, _, _) = evOld + let (idB, _, _, _, _) = evNew + let ids = [ idA; idB ] + + // order 1: old then new + do! wipe loc ids + let! _ = recv evOld + let! _ = recv evNew + let! r1 = liveHash loc + + // order 2: new then old (the older op arrives late — must be skipped, not win) + do! wipe loc ids + let! _ = recv evNew + let! _ = recv evOld + let! r2 = liveHash loc + + Expect.equal r1 [ hB ] "old→new converges to the newer hash" + Expect.equal + r2 + [ hB ] + "new→old ALSO converges to the newer hash (late older op skipped)" + Expect.equal r1 r2 "order-independent — the two-instance convergence property" + + do! wipe loc ids + let! _ = Seed.rebuildProjections () + () + } - // CONFLICT → RESOLUTION → CONVERGE, both directions. A divergence auto-resolves by LWW but is recorded; - // a human override (keep-mine / keep-theirs) mints a Resolution whose overlay wins and converges. - testTask - "conflict → resolution: keep-mine and keep-theirs each override the LWW winner" { - let! (hLocal, hIncoming) = twoFns () - let! commitHash = aCommit () - let loc : PT.PackageLocation = - { owner = "Test"; modules = [ "SyncResolve" ]; name = "z" } - let evLocal = setNameEvent loc hLocal commitHash "2099-01-01T00:00:00.100Z" - let evIncoming = - setNameEvent loc hIncoming commitHash "2099-01-01T00:00:00.200Z" - let (idL, _, _, _, _) = evLocal - let (idI, _, _, _, _) = evIncoming - - let applyResolution (choiceHash : string) (at : string) : Task = - Resolutions.recordAndApply - { id = System.Guid.NewGuid() |> string - branchId = PT.mainBranchId - location = loc - choice = PT.Reference.PackageFn(PT.Hash choiceHash) - resolvedBy = "human" - at = at } - - // set up the divergence: local hLocal@100, then incoming hIncoming@200 → LWW binds incoming - do! wipe loc [ idL; idI ] - let! _ = recv evLocal - let! _ = recv evIncoming - let! lww = liveHash loc - Expect.equal lww [ hIncoming ] "LWW binds the newer incoming hash" - - // keep-MINE: override back to the local hash with a fresh (newer) stamp → converges to local - do! applyResolution hLocal "2099-01-01T00:00:00.300Z" - let! kept = liveHash loc - Expect.equal - kept - [ hLocal ] - "keep-mine: the resolution overrides LWW back to the local hash" - - // keep-THEIRS: a later resolution back to incoming wins (last-resolver by `at`) - do! applyResolution hIncoming "2099-01-01T00:00:00.400Z" - let! flipped = liveHash loc - Expect.equal - flipped - [ hIncoming ] - "keep-theirs: a newer resolution flips it back to incoming" - - do! wipe loc [ idL; idI ] - let! _ = Seed.rebuildProjections () - () - } +let idempotentReReceive = + // IDEMPOTENCY — re-receiving the same op set changes nothing and folds 0 (so "Pulled N" stays honest and a + // re-pull can't corrupt the binding). + testTask + "idempotency: re-receiving the same op folds 0 and leaves the binding unchanged" { + let! (hA, _) = twoFns () + let! commitHash = aCommit () + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "SyncIdem" ]; name = "y" } + let ev = setNameEvent loc hA commitHash "2099-01-01T00:00:00.300Z" + let (idA, _, _, _, _) = ev + do! wipe loc [ idA ] + + let! first = recv ev + let! second = recv ev + let! bound = liveHash loc + Expect.isTrue (first >= 1L) "first receive folds the new op" + Expect.equal second 0L "re-receiving the identical op folds nothing" + Expect.equal bound [ hA ] "binding unchanged after the re-pull" + + do! wipe loc [ idA ] + let! _ = Seed.rebuildProjections () + () + } - // NO PHANTOM CONFLICTS on re-pull: a divergence is recorded once (when the rebind actually folds); - // re-receiving an already-applied op must NOT record it again (detection only fires on ops about to fold). - testTask "re-pulling an already-applied op records no phantom conflict" { - let! (hLocal, hIncoming) = twoFns () - let! commitHash = aCommit () - let loc : PT.PackageLocation = - { owner = "Test"; modules = [ "SyncPhantom" ]; name = "p" } - let evLocal = setNameEvent loc hLocal commitHash "2099-01-01T00:00:00.100Z" - let evIncoming = - setNameEvent loc hIncoming commitHash "2099-01-01T00:00:00.200Z" - let (idL, _, _, _, _) = evLocal - let (idI, _, _, _, _) = evIncoming - - let conflictCount () : Task = - Sql.query "SELECT count(*) AS n FROM sync_conflicts WHERE location = @l" - |> Sql.parameters [ "l", Sql.string "Test.SyncPhantom.p" ] - |> Sql.executeRowAsync (fun read -> read.int64 "n") - - do! wipe loc [ idL; idI ] - let! _ = recv evLocal - let! _ = recv evIncoming // the rebind folds → one divergence recorded - let! afterDivergence = conflictCount () - Expect.equal afterDivergence 1L "the rebind records exactly one divergence" - - // re-pull the now-superseded local op — already applied, so detection must NOT re-fire - let! _ = recv evLocal - let! afterRepull = conflictCount () - Expect.equal - afterRepull - 1L - "re-pulling the already-applied op records no new (phantom) conflict" - - do! wipe loc [ idL; idI ] - let! _ = Seed.rebuildProjections () - () - } +let conflictResolutionOverridesLww = + // CONFLICT → RESOLUTION → CONVERGE, both directions. A divergence auto-resolves by LWW but is recorded; a + // human override (keep-mine / keep-theirs) mints a Resolution whose overlay wins and converges. + testTask + "conflict → resolution: keep-mine and keep-theirs each override the LWW winner" { + let! (hLocal, hIncoming) = twoFns () + let! commitHash = aCommit () + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "SyncResolve" ]; name = "z" } + let evLocal = setNameEvent loc hLocal commitHash "2099-01-01T00:00:00.100Z" + let evIncoming = setNameEvent loc hIncoming commitHash "2099-01-01T00:00:00.200Z" + let (idL, _, _, _, _) = evLocal + let (idI, _, _, _, _) = evIncoming + + let applyResolution (choiceHash : string) (at : string) : Task = + Resolutions.recordAndApply + { id = System.Guid.NewGuid() |> string + branchId = PT.mainBranchId + location = loc + choice = PT.Reference.PackageFn(PT.Hash choiceHash) + resolvedBy = "human" + at = at } + + // set up the divergence: local hLocal@100, then incoming hIncoming@200 → LWW binds incoming + do! wipe loc [ idL; idI ] + let! _ = recv evLocal + let! _ = recv evIncoming + let! lww = liveHash loc + Expect.equal lww [ hIncoming ] "LWW binds the newer incoming hash" + + // keep-MINE: override back to the local hash with a fresh (newer) stamp → converges to local + do! applyResolution hLocal "2099-01-01T00:00:00.300Z" + let! kept = liveHash loc + Expect.equal + kept + [ hLocal ] + "keep-mine: the resolution overrides LWW back to the local hash" + + // keep-THEIRS: a later resolution back to incoming wins (last-resolver by `at`) + do! applyResolution hIncoming "2099-01-01T00:00:00.400Z" + let! flipped = liveHash loc + Expect.equal + flipped + [ hIncoming ] + "keep-theirs: a newer resolution flips it back to incoming" + + do! wipe loc [ idL; idI ] + let! _ = Seed.rebuildProjections () + () + } - // PAGINATION / CURSOR RESUME — the serve read (eventsSince) returns one bounded batch and a resume - // cursor; the next read after that cursor is the next batch, disjoint (so a puller loops to catch up and - // an interrupted pull resumes where it stopped). - testTask - "eventsSince paginates: bounded batches, cursor advances, batches disjoint" { - let! (_, events1, cur1) = Seed.eventsSince 0L 3L - Expect.isTrue - (List.length events1 <= 3) - "first batch is bounded to the limit" - Expect.isTrue - (List.length events1 > 0) - "first batch non-empty (the seed has committed ops)" - - let! (_, events2, cur2) = Seed.eventsSince cur1 3L - Expect.isTrue (cur2 >= cur1) "the resume cursor advances monotonically" - - let idsOf evs = evs |> List.map (fun (id, _, _, _, _) -> id) |> Set.ofList - Expect.isTrue - (Set.intersect (idsOf events1) (idsOf events2) |> Set.isEmpty) - "consecutive batches are disjoint — the cursor prevents re-reading" - } +let noPhantomConflictOnRepull = + // NO PHANTOM CONFLICTS on re-pull: a divergence is recorded once (when the rebind actually folds); + // re-receiving an already-applied op must NOT record it again (detection only fires on ops about to fold). + testTask "re-pulling an already-applied op records no phantom conflict" { + let! (hLocal, hIncoming) = twoFns () + let! commitHash = aCommit () + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "SyncPhantom" ]; name = "p" } + let evLocal = setNameEvent loc hLocal commitHash "2099-01-01T00:00:00.100Z" + let evIncoming = setNameEvent loc hIncoming commitHash "2099-01-01T00:00:00.200Z" + let (idL, _, _, _, _) = evLocal + let (idI, _, _, _, _) = evIncoming + + let conflictCount () : Task = + Sql.query "SELECT count(*) AS n FROM sync_conflicts WHERE location = @l" + |> Sql.parameters [ "l", Sql.string "Test.SyncPhantom.p" ] + |> Sql.executeRowAsync (fun read -> read.int64 "n") + + do! wipe loc [ idL; idI ] + let! _ = recv evLocal + let! _ = recv evIncoming // the rebind folds → one divergence recorded + let! afterDivergence = conflictCount () + Expect.equal afterDivergence 1L "the rebind records exactly one divergence" + + // re-pull the now-superseded local op — already applied, so detection must NOT re-fire + let! _ = recv evLocal + let! afterRepull = conflictCount () + Expect.equal + afterRepull + 1L + "re-pulling the already-applied op records no new (phantom) conflict" + + do! wipe loc [ idL; idI ] + let! _ = Seed.rebuildProjections () + () + } - // BRANCH SCM SYNC — branch structure (branch_ops) applies before content, so a package op on a - // freshly-synced branch resolves its branch_id and folds; and a merge marks the branch merged. - testTask - "branch sync: structure lands, content on the new branch folds, merge marks it" { - let! fnHash = - Sql.query "SELECT hash FROM package_functions LIMIT 1" - |> Sql.executeRowAsync (fun read -> read.string "hash") - let! baseCommit = aCommit () - let branchId = System.Guid "dead0000-0000-0000-0000-0000000b0b00" - let loc : PT.PackageLocation = - { owner = "Test"; modules = [ "BranchSync" ]; name = "onbranch" } - - let createB = - branchEvent ( - PT.BranchOp.CreateBranch( - branchId, - "test-sync-branch", - Some PT.mainBranchId, - Some(PT.Hash baseCommit) - ) - ) - let mergeB = branchEvent (PT.BranchOp.MergeBranch(branchId, PT.mainBranchId)) - let pkgEv = - setNameEventOn loc fnHash branchId baseCommit "2099-01-01T00:00:00.500Z" - - let cleanup () : Task = - task { - do! - Sql.query "DELETE FROM locations WHERE branch_id = @b" - |> Sql.parameters [ "b", Sql.uuid branchId ] - |> Sql.executeStatementAsync - do! - Sql.query "DELETE FROM package_ops WHERE branch_id = @b" - |> Sql.parameters [ "b", Sql.uuid branchId ] - |> Sql.executeStatementAsync - do! - Sql.query "DELETE FROM branches WHERE id = @b" - |> Sql.parameters [ "b", Sql.uuid branchId ] - |> Sql.executeStatementAsync - do! - Sql.query "DELETE FROM branch_ops WHERE id = @c OR id = @m" - |> Sql.parameters - [ "c", Sql.string (let (i, _, _) = createB in i) - "m", Sql.string (let (i, _, _) = mergeB in i) ] - |> Sql.executeStatementAsync - } - - do! cleanup () - - // structure first: the branch lands - let! _ = Seed.receiveBranchOps [ createB ] - let! branchExists = - Sql.query "SELECT count(*) AS n FROM branches WHERE id = @b" +let eventsSincePaginates = + // PAGINATION / CURSOR RESUME — the serve read (eventsSince) returns one bounded batch and a resume cursor; + // the next read after that cursor is the next batch, disjoint (so a puller loops to catch up and an + // interrupted pull resumes where it stopped). + testTask + "eventsSince paginates: bounded batches, cursor advances, batches disjoint" { + let! (_, events1, cur1) = Seed.eventsSince 0L 3L + Expect.isTrue (List.length events1 <= 3) "first batch is bounded to the limit" + Expect.isTrue + (List.length events1 > 0) + "first batch non-empty (the seed has committed ops)" + + let! (_, events2, cur2) = Seed.eventsSince cur1 3L + Expect.isTrue (cur2 >= cur1) "the resume cursor advances monotonically" + + let idsOf evs = evs |> List.map (fun (id, _, _, _, _) -> id) |> Set.ofList + Expect.isTrue + (Set.intersect (idsOf events1) (idsOf events2) |> Set.isEmpty) + "consecutive batches are disjoint — the cursor prevents re-reading" + } + +let branchSyncStructureContentMerge = + // BRANCH SCM SYNC — branch structure (branch_ops) applies before content, so a package op on a + // freshly-synced branch resolves its branch_id and folds; and a merge marks the branch merged. + testTask + "branch sync: structure lands, content on the new branch folds, merge marks it" { + let! fnHash = + Sql.query "SELECT hash FROM package_functions LIMIT 1" + |> Sql.executeRowAsync (fun read -> read.string "hash") + let! baseCommit = aCommit () + let branchId = System.Guid "dead0000-0000-0000-0000-0000000b0b00" + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "BranchSync" ]; name = "onbranch" } + + let createB = + branchEvent ( + PT.BranchOp.CreateBranch( + branchId, + "test-sync-branch", + Some PT.mainBranchId, + Some(PT.Hash baseCommit) + ) + ) + let mergeB = branchEvent (PT.BranchOp.MergeBranch(branchId, PT.mainBranchId)) + let pkgEv = + setNameEventOn loc fnHash branchId baseCommit "2099-01-01T00:00:00.500Z" + + let cleanup () : Task = + task { + do! + Sql.query "DELETE FROM locations WHERE branch_id = @b" |> Sql.parameters [ "b", Sql.uuid branchId ] - |> Sql.executeRowAsync (fun read -> read.int64 "n") - Expect.equal branchExists 1L "CreateBranch synced — the branch exists" - - // content on the new branch folds — branch_id resolves because structure came first - let! _ = Seed.receiveOps [] [ pkgEv ] - let! bound = - Sql.query - "SELECT item_hash FROM locations WHERE branch_id = @b AND name = 'onbranch' AND unlisted_at IS NULL" + |> Sql.executeStatementAsync + do! + Sql.query "DELETE FROM package_ops WHERE branch_id = @b" |> Sql.parameters [ "b", Sql.uuid branchId ] - |> Sql.executeAsync (fun read -> read.string "item_hash") - Expect.equal - bound - [ fnHash ] - "a package op on the synced branch folded into locations under that branch" - - // merge marks it merged - let! _ = Seed.receiveBranchOps [ mergeB ] - let! mergedAt = - Sql.query "SELECT merged_at FROM branches WHERE id = @b" + |> Sql.executeStatementAsync + do! + Sql.query "DELETE FROM branches WHERE id = @b" |> Sql.parameters [ "b", Sql.uuid branchId ] - |> Sql.executeRowAsync (fun read -> read.stringOrNone "merged_at") - Expect.isSome mergedAt "MergeBranch marked the branch merged_at" + |> Sql.executeStatementAsync + do! + Sql.query "DELETE FROM branch_ops WHERE id = @c OR id = @m" + |> Sql.parameters + [ "c", Sql.string (let (i, _, _) = createB in i) + "m", Sql.string (let (i, _, _) = mergeB in i) ] + |> Sql.executeStatementAsync + } + + do! cleanup () - do! cleanup () - let! _ = Seed.rebuildProjections () - () - } ] + // structure first: the branch lands + let! _ = Seed.receiveBranchOps [ createB ] + let! branchExists = + Sql.query "SELECT count(*) AS n FROM branches WHERE id = @b" + |> Sql.parameters [ "b", Sql.uuid branchId ] + |> Sql.executeRowAsync (fun read -> read.int64 "n") + Expect.equal branchExists 1L "CreateBranch synced — the branch exists" + + // content on the new branch folds — branch_id resolves because structure came first + let! _ = Seed.receiveOps [] [ pkgEv ] + let! bound = + Sql.query + "SELECT item_hash FROM locations WHERE branch_id = @b AND name = 'onbranch' AND unlisted_at IS NULL" + |> Sql.parameters [ "b", Sql.uuid branchId ] + |> Sql.executeAsync (fun read -> read.string "item_hash") + Expect.equal + bound + [ fnHash ] + "a package op on the synced branch folded into locations under that branch" + + // merge marks it merged + let! _ = Seed.receiveBranchOps [ mergeB ] + let! mergedAt = + Sql.query "SELECT merged_at FROM branches WHERE id = @b" + |> Sql.parameters [ "b", Sql.uuid branchId ] + |> Sql.executeRowAsync (fun read -> read.stringOrNone "merged_at") + Expect.isSome mergedAt "MergeBranch marked the branch merged_at" + + do! cleanup () + let! _ = Seed.rebuildProjections () + () + } + + +let tests = + testSequenced + <| testList + "SyncScenarios" + [ convergenceOrderIndependent + idempotentReReceive + conflictResolutionOverridesLww + noPhantomConflictOnRepull + eventsSincePaginates + branchSyncStructureContentMerge ] From 40a4fdc8dffe7c1fda5946f1bd41c5c37c4751ad Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 01:57:14 -0400 Subject: [PATCH 059/172] =?UTF-8?q?tests:=20de-nest=20Hashing=20=E2=80=94?= =?UTF-8?q?=20sub-groups=20to=20root-level=20lets?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Was testList-within-testList (one 'Hashing' list holding 8 inline sub-lists + alphaNormTests). Pull each group out to a root-level `let` (like alphaNormTests already was) and assemble them in one flat testList at the end — same grouping, no deep inline nesting. Bodies unchanged; 39/39 green. Co-Authored-By: Claude Opus 4.8 --- backend/tests/Tests/Hashing.Tests.fs | 1123 +++++++++++++------------- 1 file changed, 556 insertions(+), 567 deletions(-) diff --git a/backend/tests/Tests/Hashing.Tests.fs b/backend/tests/Tests/Hashing.Tests.fs index 9b0d882489..825ea26bf6 100644 --- a/backend/tests/Tests/Hashing.Tests.fs +++ b/backend/tests/Tests/Hashing.Tests.fs @@ -27,8 +27,6 @@ let private makeValue (body : PT.Expr) : PT.PackageValue.PackageValue = { hash = PT.Hash ""; body = body; description = "" } -// ── Tests ──────────────────────────────────────────────────────────────── - // ── meaning-stable hashing: bound-variable names don't affect the hash (alpha-normalization) ── let private fnOf @@ -41,8 +39,8 @@ let private fnOf | h :: t -> NEList.ofList h t testPackageFn [] ps PT.TInt64 body -// the LIVE content hash — `computeFnHash` alpha-normalizes internally, so this *is* the -// meaning-stable hash. (`normalizeFn` stays public + idempotent; the last test pins that directly.) +// the LIVE content hash — `computeFnHash` alpha-normalizes internally, so this *is* the meaning-stable hash. +// (`normalizeFn` stays public + idempotent; the last test pins that directly.) let private h (paramNames : List) (body : PT.Expr) : PT.Hash = Hashing.computeFnHash Hashing.Normal (fnOf paramNames body) @@ -56,9 +54,9 @@ let private alphaNormTests = "meaning-stable (alpha-normalization)" [ test "parameter names don't affect the hash (a parameter use is positional, EArg)" { - // the body references parameters by position (EArg index), and the parameter name isn't hashed, - // so two fns identical up to parameter names share one content hash. (Meaning-preservation — - // which parameter goes where — is pinned by the next test and the let/lambda/match tests below.) + // the body references parameters by position (EArg index), and the parameter name isn't hashed, so + // two fns identical up to parameter names share one content hash. (Meaning-preservation — which + // parameter goes where — is pinned by the next test and the let/lambda/match tests below.) let body = eTuple (eArg 0) (eArg 1) [] // (param0, param1) — positional Expect.equal (h [ "x"; "y" ] body) @@ -142,9 +140,8 @@ let private alphaNormTests = test "normalization is idempotent (re-normalizing an already-normalized expr is a structural no-op)" { // Compare the normalized EXPR structures directly (not through computeFnHash, which normalizes - // internally — that would re-normalize both sides and hide a first-pass difference). normalizeExpr - // preserves ids and only renames binders, so a second pass over the canonical form must be identity. - // Use real binders (let + lambda + a shadowing inner let) so there is something to normalize. + // internally). normalizeExpr preserves ids and only renames binders, so a second pass over the + // canonical form must be identity. Use real binders (let + lambda + a shadowing inner let). let body = eLet (lpVar "outer") @@ -162,566 +159,558 @@ let private alphaNormTests = } ] -let tests = +let private typeHashTests = testList - "Hashing" - [ testList - "computeTypeHash" - [ test "determinism: same type hashed twice gives same hash" { - let typ = - makeType ( - PT.TypeDeclaration.Record( - NEList.singleton - { name = "x"; typ = PT.TInt64; description = "field" } - ) - ) - let h1 = Hashing.computeTypeHash Hashing.Normal typ - let h2 = Hashing.computeTypeHash Hashing.Normal typ - Expect.equal h1 h2 "same type should hash identically" - } - - test "different content gives different hash" { - let typ1 = - makeType ( - PT.TypeDeclaration.Record( - NEList.singleton { name = "x"; typ = PT.TInt64; description = "" } - ) - ) - let typ2 = - makeType ( - PT.TypeDeclaration.Record( - NEList.singleton { name = "y"; typ = PT.TString; description = "" } - ) - ) - let h1 = Hashing.computeTypeHash Hashing.Normal typ1 - let h2 = Hashing.computeTypeHash Hashing.Normal typ2 - Expect.notEqual h1 h2 "different types should hash differently" - } + "computeTypeHash" + [ test "determinism: same type hashed twice gives same hash" { + let typ = + makeType ( + PT.TypeDeclaration.Record( + NEList.singleton { name = "x"; typ = PT.TInt64; description = "field" } + ) + ) + let h1 = Hashing.computeTypeHash Hashing.Normal typ + let h2 = Hashing.computeTypeHash Hashing.Normal typ + Expect.equal h1 h2 "same type should hash identically" + } + + test "different content gives different hash" { + let typ1 = + makeType ( + PT.TypeDeclaration.Record( + NEList.singleton { name = "x"; typ = PT.TInt64; description = "" } + ) + ) + let typ2 = + makeType ( + PT.TypeDeclaration.Record( + NEList.singleton { name = "y"; typ = PT.TString; description = "" } + ) + ) + let h1 = Hashing.computeTypeHash Hashing.Normal typ1 + let h2 = Hashing.computeTypeHash Hashing.Normal typ2 + Expect.notEqual h1 h2 "different types should hash differently" + } + + test "description does not affect hash" { + let def = + PT.TypeDeclaration.Record( + NEList.singleton { name = "a"; typ = PT.TBool; description = "" } + ) + let typ1 = { makeType def with description = "first" } + let typ2 = { makeType def with description = "second" } + let h1 = Hashing.computeTypeHash Hashing.Normal typ1 + let h2 = Hashing.computeTypeHash Hashing.Normal typ2 + Expect.equal h1 h2 "description should not affect hash" + } ] + + +let private fnHashTests = + testList + "computeFnHash" + [ test "determinism: same fn hashed twice gives same hash" { + let fn = makeFn (eInt64 42) + let h1 = Hashing.computeFnHash Hashing.Normal fn + let h2 = Hashing.computeFnHash Hashing.Normal fn + Expect.equal h1 h2 "same fn should hash identically" + } + + test "different body gives different hash" { + let fn1 = makeFn (eInt64 42) + let fn2 = makeFn (eInt64 99) + let h1 = Hashing.computeFnHash Hashing.Normal fn1 + let h2 = Hashing.computeFnHash Hashing.Normal fn2 + Expect.notEqual h1 h2 "different bodies should hash differently" + } + + test "AST node IDs do not affect hash" { + let fn1 = makeFn (PT.EInt64(1UL, 42)) + let fn2 = makeFn (PT.EInt64(9999UL, 42)) + let h1 = Hashing.computeFnHash Hashing.Normal fn1 + let h2 = Hashing.computeFnHash Hashing.Normal fn2 + Expect.equal h1 h2 "AST node IDs should not affect hash" + } ] + + +let private valueHashTests = + testList + "computeValueHash" + [ test "determinism" { + let v = makeValue (eInt64 7) + let h1 = Hashing.computeValueHash Hashing.Normal v + let h2 = Hashing.computeValueHash Hashing.Normal v + Expect.equal h1 h2 "same value should hash identically" + } ] + + +let private opHashTests = + testList + "computeOpHash" + [ test "returns Hash" { + let fn = makeFn (eInt64 1) + let op = PT.PackageOp.AddFn fn + let hash = Hashing.computeOpHash op + let (PT.Hash h) = hash + Expect.isTrue (h.Length = 64) "should be 64 hex chars (SHA-256)" + } + + test "determinism" { + let fn = makeFn (eInt64 1) + let op = PT.PackageOp.AddFn fn + let h1 = Hashing.computeOpHash op + let h2 = Hashing.computeOpHash op + Expect.equal h1 h2 "same op should hash identically" + } ] + + +let private commitHashTests = + testList + "computeCommitHash" + [ let branch = System.Guid.Parse "11111111-1111-1111-1111-111111111111" + let account = System.Guid.Parse "aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa" + + test "determinism" { + let opHash1 = PT.Hash "aabb" + let opHash2 = PT.Hash "ccdd" + let parent = Some(PT.Hash "0011") + let h1 = Hashing.computeCommitHash branch account parent [ opHash1; opHash2 ] + let h2 = Hashing.computeCommitHash branch account parent [ opHash1; opHash2 ] + Expect.equal h1 h2 "same inputs should give same commit hash" + } + + test "op order independence (sorted internally)" { + let opHash1 = PT.Hash "aabb" + let opHash2 = PT.Hash "ccdd" + let parent = Some(PT.Hash "0011") + let h1 = Hashing.computeCommitHash branch account parent [ opHash1; opHash2 ] + let h2 = Hashing.computeCommitHash branch account parent [ opHash2; opHash1 ] + Expect.equal h1 h2 "op order should not matter" + } + + test "different parent gives different hash" { + let ops = [ PT.Hash "aabb" ] + let h1 = Hashing.computeCommitHash branch account (Some(PT.Hash "0011")) ops + let h2 = Hashing.computeCommitHash branch account (Some(PT.Hash "0022")) ops + Expect.notEqual h1 h2 "different parent should give different hash" + } + + test "different branch gives different hash" { + let other = System.Guid.Parse "22222222-2222-2222-2222-222222222222" + let parent = Some(PT.Hash "0011") + let ops = [ PT.Hash "aabb" ] + let h1 = Hashing.computeCommitHash branch account parent ops + let h2 = Hashing.computeCommitHash other account parent ops + Expect.notEqual h1 h2 "different branch should give different hash" + } + + test "different account gives different hash" { + // Two accounts producing identical op sets on the same branch and parent must hash to different + // commits — keeps the global `commits.hash` PK + INSERT OR IGNORE safe. + let other = System.Guid.Parse "bbbbbbbb-bbbb-bbbb-bbbb-bbbbbbbbbbbb" + let parent = Some(PT.Hash "0011") + let ops = [ PT.Hash "aabb" ] + let h1 = Hashing.computeCommitHash branch account parent ops + let h2 = Hashing.computeCommitHash branch other parent ops + Expect.notEqual h1 h2 "different account should give different hash" + } + + test "empty commit (no ops, just parent)" { + let parent = Some(PT.Hash "0011") + let h1 = Hashing.computeCommitHash branch account parent [] + let h2 = Hashing.computeCommitHash branch account parent [] + Expect.equal h1 h2 "empty commit should be deterministic" + } ] + + +let private sccTests = + testList + "findSCCs (Tarjan)" + [ test "single node, no edges" { + let sccs = Hashing.findSCCs [ 1 ] (fun _ -> []) + Expect.equal (List.length sccs) 1 "should have 1 SCC" + Expect.equal sccs[0].head 1 "single node" + Expect.equal sccs[0].tail [] "no tail" + } + + test "linear chain (no cycles)" { + // A -> B -> C + let edges = + function + | 1 -> [ 2 ] + | 2 -> [ 3 ] + | _ -> [] + let sccs = Hashing.findSCCs [ 1; 2; 3 ] edges + Expect.equal (List.length sccs) 3 "3 separate SCCs" + } - test "description does not affect hash" { - let def = + test "cycle A->B->C->A gives one SCC" { + let edges = + function + | 1 -> [ 2 ] + | 2 -> [ 3 ] + | 3 -> [ 1 ] + | _ -> [] + let sccs = Hashing.findSCCs [ 1; 2; 3 ] edges + Expect.equal (List.length sccs) 1 "one SCC" + let scc = sccs[0] + let members = Set.ofList (scc.head :: scc.tail) + Expect.equal members (Set.ofList [ 1; 2; 3 ]) "all three in SCC" + } + + test "two separate cycles" { + // A<->B, C<->D + let edges = + function + | 1 -> [ 2 ] + | 2 -> [ 1 ] + | 3 -> [ 4 ] + | 4 -> [ 3 ] + | _ -> [] + let sccs = Hashing.findSCCs [ 1; 2; 3; 4 ] edges + Expect.equal (List.length sccs) 2 "two SCCs" + } ] + + +let private placeholderHashTests = + testList + "placeholder hashes (toFQN-based)" + [ test "same location gives same FQN" { + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "Mod" ]; name = "Foo" } + Expect.equal + (PackageLocation.toFQN loc) + (PackageLocation.toFQN loc) + "FQN should be deterministic" + } + + test "different locations give different FQNs" { + let loc1 : PT.PackageLocation = + { owner = "Test"; modules = [ "Mod" ]; name = "Foo" } + let loc2 : PT.PackageLocation = + { owner = "Test"; modules = [ "Mod" ]; name = "Bar" } + Expect.notEqual + (PackageLocation.toFQN loc1) + (PackageLocation.toFQN loc2) + "different names should differ" + } + + test "FQN format matches expected pattern" { + let loc : PT.PackageLocation = + { owner = "Darklang"; modules = [ "Stdlib"; "List" ]; name = "map" } + Expect.equal + (PackageLocation.toFQN loc) + "Darklang.Stdlib.List.map" + "FQN should be owner.modules.name" + } + + test "FQN-based SHA-256 produces valid hash" { + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "Mod" ]; name = "Foo" } + let nameKey = PackageLocation.toFQN loc + let nameBytes = + System.Security.Cryptography.SHA256.HashData( + System.Text.Encoding.UTF8.GetBytes(nameKey) + ) + let hash = + PT.Hash( + System.BitConverter + .ToString(nameBytes) + .Replace("-", "") + .ToLowerInvariant() + ) + let (PT.Hash h) = hash + Expect.isTrue (h.Length = 64) "should be 64 hex chars (SHA-256)" + } ] + + +let private sccBatchTests = + testList + "SCC batch hashing" + [ test "two mutually-recursive types get stable hashes" { + let id1 = PT.Hash "test-scc-type-1" + let id2 = PT.Hash "test-scc-type-2" + let typ1 = + { (makeType (PT.TypeDeclaration.Alias PT.TInt64)) with hash = id1 } + let typ2 = + { (makeType (PT.TypeDeclaration.Alias PT.TString)) with hash = id2 } + + // Maps keyed by FQN; tuple value is (item, oldHash, location) + let types = + [ ("Test.A", (typ1, id1, None)); ("Test.B", (typ2, id2, None)) ] + |> Map.ofList + + let getDeps fqn = + if fqn = "Test.A" then [ "Test.B" ] + elif fqn = "Test.B" then [ "Test.A" ] + else [] + + let hashes1 = + Hashing.computeHashesWithSCCs + Canonical.emptySubstitution + types + Map.empty + Map.empty + getDeps + let hashes2 = + Hashing.computeHashesWithSCCs + Canonical.emptySubstitution + types + Map.empty + Map.empty + getDeps + + Expect.equal hashes1 hashes2 "SCC hashes should be deterministic" + Expect.notEqual + (Map.find "Test.A" hashes1) + (Map.find "Test.B" hashes1) + "different items in SCC should have different hashes" + } + + test "SCC name refs are keyed by location when old hashes collide" { + let sharedHash = PT.Hash "test-scc-shared-old-hash" + let locA : PT.PackageLocation = + { owner = "Test"; modules = [ "Scc" ]; name = "A" } + let locB : PT.PackageLocation = + { owner = "Test"; modules = [ "Scc" ]; name = "B" } + + let valueRef (loc : PT.PackageLocation) = + PT.EValue( + gid (), + { originalName = [] + resolved = + Ok { name = PT.FQValueName.Package sharedHash; location = Some loc } } + ) + + let mode : Canonical.HashRefMode = + { subst = Canonical.emptySubstitution + sccNames = + { byLocation = [ locA, "Test.Scc.A"; locB, "Test.Scc.B" ] |> Map.ofList + byHash = [ sharedHash, "Test.Scc.B" ] |> Map.ofList } } + + let hashA = Hashing.computeValueHash mode (makeValue (valueRef locA)) + let hashB = Hashing.computeValueHash mode (makeValue (valueRef locB)) + + Expect.notEqual + hashA + hashB + "same-hash SCC refs at different locations should canonicalize to different FQN refs" + } + + test "3-node cycle A->B->C->A gets stable hashes" { + let idA = PT.Hash "test-3cycle-A" + let idB = PT.Hash "test-3cycle-B" + let idC = PT.Hash "test-3cycle-C" + let typA = + { (makeType (PT.TypeDeclaration.Alias PT.TInt64)) with hash = idA } + let typB = + { (makeType (PT.TypeDeclaration.Alias PT.TString)) with hash = idB } + let typC = { (makeType (PT.TypeDeclaration.Alias PT.TBool)) with hash = idC } + + let types = + [ ("Test.A", (typA, idA, None)) + ("Test.B", (typB, idB, None)) + ("Test.C", (typC, idC, None)) ] + |> Map.ofList + + // A->B->C->A cycle + let getDeps fqn = + if fqn = "Test.A" then [ "Test.B" ] + elif fqn = "Test.B" then [ "Test.C" ] + elif fqn = "Test.C" then [ "Test.A" ] + else [] + + let hashes1 = + Hashing.computeHashesWithSCCs + Canonical.emptySubstitution + types + Map.empty + Map.empty + getDeps + let hashes2 = + Hashing.computeHashesWithSCCs + Canonical.emptySubstitution + types + Map.empty + Map.empty + getDeps + + Expect.equal hashes1 hashes2 "3-node SCC hashes should be deterministic" + + // All three items should get distinct hashes despite being in the same SCC + let hashA = Map.find "Test.A" hashes1 + let hashB = Map.find "Test.B" hashes1 + let hashC = Map.find "Test.C" hashes1 + Expect.notEqual hashA hashB "A and B should have different hashes" + Expect.notEqual hashB hashC "B and C should have different hashes" + Expect.notEqual hashA hashC "A and C should have different hashes" + } + + test "3-node cycle is order-independent" { + let idA = PT.Hash "test-3cycle-A" + let idB = PT.Hash "test-3cycle-B" + let idC = PT.Hash "test-3cycle-C" + let typA = + { (makeType (PT.TypeDeclaration.Alias PT.TInt64)) with hash = idA } + let typB = + { (makeType (PT.TypeDeclaration.Alias PT.TString)) with hash = idB } + let typC = { (makeType (PT.TypeDeclaration.Alias PT.TBool)) with hash = idC } + + let getDeps fqn = + if fqn = "Test.A" then [ "Test.B" ] + elif fqn = "Test.B" then [ "Test.C" ] + elif fqn = "Test.C" then [ "Test.A" ] + else [] + + // Declaration order 1: A, B, C + let types1 = + [ ("Test.A", (typA, idA, None)) + ("Test.B", (typB, idB, None)) + ("Test.C", (typC, idC, None)) ] + |> Map.ofList + + // Declaration order 2: C, A, B + let types2 = + [ ("Test.C", (typC, idC, None)) + ("Test.A", (typA, idA, None)) + ("Test.B", (typB, idB, None)) ] + |> Map.ofList + + let hashes1 = + Hashing.computeHashesWithSCCs + Canonical.emptySubstitution + types1 + Map.empty + Map.empty + getDeps + let hashes2 = + Hashing.computeHashesWithSCCs + Canonical.emptySubstitution + types2 + Map.empty + Map.empty + getDeps + + Expect.equal + (Map.find "Test.A" hashes1) + (Map.find "Test.A" hashes2) + "A hash same regardless of order" + Expect.equal + (Map.find "Test.B" hashes1) + (Map.find "Test.B" hashes2) + "B hash same regardless of order" + Expect.equal + (Map.find "Test.C" hashes1) + (Map.find "Test.C" hashes2) + "C hash same regardless of order" + } + + test "self-recursive type does not infinite loop and gets stable hash" { + let idTStr = "test-self-recursive" + let idT = PT.Hash idTStr + // A type that references itself (like a linked list node) + let typ = + { (makeType ( PT.TypeDeclaration.Record( - NEList.singleton { name = "a"; typ = PT.TBool; description = "" } - ) - let typ1 = { makeType def with description = "first" } - let typ2 = { makeType def with description = "second" } - let h1 = Hashing.computeTypeHash Hashing.Normal typ1 - let h2 = Hashing.computeTypeHash Hashing.Normal typ2 - Expect.equal h1 h2 "description should not affect hash" - } ] - - - testList - "computeFnHash" - [ test "determinism: same fn hashed twice gives same hash" { - let fn = makeFn (eInt64 42) - let h1 = Hashing.computeFnHash Hashing.Normal fn - let h2 = Hashing.computeFnHash Hashing.Normal fn - Expect.equal h1 h2 "same fn should hash identically" - } - - test "different body gives different hash" { - let fn1 = makeFn (eInt64 42) - let fn2 = makeFn (eInt64 99) - let h1 = Hashing.computeFnHash Hashing.Normal fn1 - let h2 = Hashing.computeFnHash Hashing.Normal fn2 - Expect.notEqual h1 h2 "different bodies should hash differently" - } - - test "AST node IDs do not affect hash" { - let fn1 = makeFn (PT.EInt64(1UL, 42)) - let fn2 = makeFn (PT.EInt64(9999UL, 42)) - let h1 = Hashing.computeFnHash Hashing.Normal fn1 - let h2 = Hashing.computeFnHash Hashing.Normal fn2 - Expect.equal h1 h2 "AST node IDs should not affect hash" - } ] - - - testList - "computeValueHash" - [ test "determinism" { - let v = makeValue (eInt64 7) - let h1 = Hashing.computeValueHash Hashing.Normal v - let h2 = Hashing.computeValueHash Hashing.Normal v - Expect.equal h1 h2 "same value should hash identically" - } ] - - - testList - "computeOpHash" - [ test "returns Hash" { - let fn = makeFn (eInt64 1) - let op = PT.PackageOp.AddFn fn - let hash = Hashing.computeOpHash op - let (PT.Hash h) = hash - Expect.isTrue (h.Length = 64) "should be 64 hex chars (SHA-256)" - } - - test "determinism" { - let fn = makeFn (eInt64 1) - let op = PT.PackageOp.AddFn fn - let h1 = Hashing.computeOpHash op - let h2 = Hashing.computeOpHash op - Expect.equal h1 h2 "same op should hash identically" - } ] - - - testList - "computeCommitHash" - [ let branch = System.Guid.Parse "11111111-1111-1111-1111-111111111111" - let account = System.Guid.Parse "aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa" - - test "determinism" { - let opHash1 = PT.Hash "aabb" - let opHash2 = PT.Hash "ccdd" - let parent = Some(PT.Hash "0011") - let h1 = - Hashing.computeCommitHash branch account parent [ opHash1; opHash2 ] - let h2 = - Hashing.computeCommitHash branch account parent [ opHash1; opHash2 ] - Expect.equal h1 h2 "same inputs should give same commit hash" - } - - test "op order independence (sorted internally)" { - let opHash1 = PT.Hash "aabb" - let opHash2 = PT.Hash "ccdd" - let parent = Some(PT.Hash "0011") - let h1 = - Hashing.computeCommitHash branch account parent [ opHash1; opHash2 ] - let h2 = - Hashing.computeCommitHash branch account parent [ opHash2; opHash1 ] - Expect.equal h1 h2 "op order should not matter" - } - - test "different parent gives different hash" { - let ops = [ PT.Hash "aabb" ] - let h1 = - Hashing.computeCommitHash branch account (Some(PT.Hash "0011")) ops - let h2 = - Hashing.computeCommitHash branch account (Some(PT.Hash "0022")) ops - Expect.notEqual h1 h2 "different parent should give different hash" - } - - test "different branch gives different hash" { - let other = System.Guid.Parse "22222222-2222-2222-2222-222222222222" - let parent = Some(PT.Hash "0011") - let ops = [ PT.Hash "aabb" ] - let h1 = Hashing.computeCommitHash branch account parent ops - let h2 = Hashing.computeCommitHash other account parent ops - Expect.notEqual h1 h2 "different branch should give different hash" - } - - test "different account gives different hash" { - // Two accounts producing identical op sets on the same branch - // and parent must hash to different commits — keeps the - // global `commits.hash` PK + INSERT OR IGNORE safe. - let other = System.Guid.Parse "bbbbbbbb-bbbb-bbbb-bbbb-bbbbbbbbbbbb" - let parent = Some(PT.Hash "0011") - let ops = [ PT.Hash "aabb" ] - let h1 = Hashing.computeCommitHash branch account parent ops - let h2 = Hashing.computeCommitHash branch other parent ops - Expect.notEqual h1 h2 "different account should give different hash" - } - - test "empty commit (no ops, just parent)" { - let parent = Some(PT.Hash "0011") - let h1 = Hashing.computeCommitHash branch account parent [] - let h2 = Hashing.computeCommitHash branch account parent [] - Expect.equal h1 h2 "empty commit should be deterministic" - } ] - - - testList - "findSCCs (Tarjan)" - [ test "single node, no edges" { - let sccs = Hashing.findSCCs [ 1 ] (fun _ -> []) - Expect.equal (List.length sccs) 1 "should have 1 SCC" - Expect.equal sccs[0].head 1 "single node" - Expect.equal sccs[0].tail [] "no tail" - } - - test "linear chain (no cycles)" { - // A -> B -> C - let edges = - function - | 1 -> [ 2 ] - | 2 -> [ 3 ] - | _ -> [] - let sccs = Hashing.findSCCs [ 1; 2; 3 ] edges - Expect.equal (List.length sccs) 3 "3 separate SCCs" - } - - test "cycle A->B->C->A gives one SCC" { - let edges = - function - | 1 -> [ 2 ] - | 2 -> [ 3 ] - | 3 -> [ 1 ] - | _ -> [] - let sccs = Hashing.findSCCs [ 1; 2; 3 ] edges - Expect.equal (List.length sccs) 1 "one SCC" - let scc = sccs[0] - let members = Set.ofList (scc.head :: scc.tail) - Expect.equal members (Set.ofList [ 1; 2; 3 ]) "all three in SCC" - } - - test "two separate cycles" { - // A<->B, C<->D - let edges = - function - | 1 -> [ 2 ] - | 2 -> [ 1 ] - | 3 -> [ 4 ] - | 4 -> [ 3 ] - | _ -> [] - let sccs = Hashing.findSCCs [ 1; 2; 3; 4 ] edges - Expect.equal (List.length sccs) 2 "two SCCs" - } ] - - - testList - "placeholder hashes (toFQN-based)" - [ test "same location gives same FQN" { - let loc : PT.PackageLocation = - { owner = "Test"; modules = [ "Mod" ]; name = "Foo" } - Expect.equal - (PackageLocation.toFQN loc) - (PackageLocation.toFQN loc) - "FQN should be deterministic" - } - - test "different locations give different FQNs" { - let loc1 : PT.PackageLocation = - { owner = "Test"; modules = [ "Mod" ]; name = "Foo" } - let loc2 : PT.PackageLocation = - { owner = "Test"; modules = [ "Mod" ]; name = "Bar" } - Expect.notEqual - (PackageLocation.toFQN loc1) - (PackageLocation.toFQN loc2) - "different names should differ" - } - - test "FQN format matches expected pattern" { - let loc : PT.PackageLocation = - { owner = "Darklang"; modules = [ "Stdlib"; "List" ]; name = "map" } - Expect.equal - (PackageLocation.toFQN loc) - "Darklang.Stdlib.List.map" - "FQN should be owner.modules.name" - } - - test "FQN-based SHA-256 produces valid hash" { - let loc : PT.PackageLocation = - { owner = "Test"; modules = [ "Mod" ]; name = "Foo" } - let nameKey = PackageLocation.toFQN loc - let nameBytes = - System.Security.Cryptography.SHA256.HashData( - System.Text.Encoding.UTF8.GetBytes(nameKey) - ) - let hash = - PT.Hash( - System.BitConverter - .ToString(nameBytes) - .Replace("-", "") - .ToLowerInvariant() - ) - let (PT.Hash h) = hash - Expect.isTrue (h.Length = 64) "should be 64 hex chars (SHA-256)" - } ] - - - testList - "SCC batch hashing" - [ test "two mutually-recursive types get stable hashes" { - let id1 = PT.Hash "test-scc-type-1" - let id2 = PT.Hash "test-scc-type-2" - let typ1 = - { (makeType (PT.TypeDeclaration.Alias PT.TInt64)) with hash = id1 } - let typ2 = - { (makeType (PT.TypeDeclaration.Alias PT.TString)) with hash = id2 } - - // Maps keyed by FQN; tuple value is (item, oldHash, location) - let types = - [ ("Test.A", (typ1, id1, None)); ("Test.B", (typ2, id2, None)) ] - |> Map.ofList - - let getDeps fqn = - if fqn = "Test.A" then [ "Test.B" ] - elif fqn = "Test.B" then [ "Test.A" ] - else [] - - let hashes1 = - Hashing.computeHashesWithSCCs - Canonical.emptySubstitution - types - Map.empty - Map.empty - getDeps - let hashes2 = - Hashing.computeHashesWithSCCs - Canonical.emptySubstitution - types - Map.empty - Map.empty - getDeps - - Expect.equal hashes1 hashes2 "SCC hashes should be deterministic" - Expect.notEqual - (Map.find "Test.A" hashes1) - (Map.find "Test.B" hashes1) - "different items in SCC should have different hashes" - } - - - test "SCC name refs are keyed by location when old hashes collide" { - let sharedHash = PT.Hash "test-scc-shared-old-hash" - let locA : PT.PackageLocation = - { owner = "Test"; modules = [ "Scc" ]; name = "A" } - let locB : PT.PackageLocation = - { owner = "Test"; modules = [ "Scc" ]; name = "B" } - - let valueRef (loc : PT.PackageLocation) = - PT.EValue( - gid (), - { originalName = [] - resolved = - Ok - { name = PT.FQValueName.Package sharedHash - location = Some loc } } + NEList.ofListUnsafe + "" + [] + [ { name = "value"; typ = PT.TInt64; description = "" } + { name = "next" + typ = + PT.TCustomType( + PT.NameResolution.ok (PT.FQTypeName.fqPackage idTStr), + [] + ) + description = "" } ] ) + )) with + hash = idT } + + let types = [ ("Test.T", (typ, idT, None)) ] |> Map.ofList + + // Self-loop: T depends on T + let getDeps fqn = if fqn = "Test.T" then [ "Test.T" ] else [] + + let hashes1 = + Hashing.computeHashesWithSCCs + Canonical.emptySubstitution + types + Map.empty + Map.empty + getDeps + let hashes2 = + Hashing.computeHashesWithSCCs + Canonical.emptySubstitution + types + Map.empty + Map.empty + getDeps + + Expect.equal + hashes1 + hashes2 + "self-recursive type hash should be deterministic" + + let (PT.Hash h) = Map.findUnsafe "Test.T" hashes1 + Expect.isTrue (h.Length = 64) "should be 64 hex chars (SHA-256)" + } + + test "mixed cycle: type and fn that mutually depend on each other" { + let idTyp = PT.Hash "test-mixed-type" + let idFn = PT.Hash "test-mixed-fn" + + // A type that (via getDeps) depends on the function + let typ = + { (makeType (PT.TypeDeclaration.Alias PT.TInt64)) with hash = idTyp } + // A function that (via getDeps) depends on the type + let fn = { (makeFn (eInt64 42)) with hash = idFn } + + let types = [ ("Test.MyType", (typ, idTyp, None)) ] |> Map.ofList + let fns = [ ("Test.myFn", (fn, idFn, None)) ] |> Map.ofList + + // MyType depends on myFn, myFn depends on MyType + let getDeps fqn = + if fqn = "Test.MyType" then [ "Test.myFn" ] + elif fqn = "Test.myFn" then [ "Test.MyType" ] + else [] + + let hashes1 = + Hashing.computeHashesWithSCCs + Canonical.emptySubstitution + types + fns + Map.empty + getDeps + let hashes2 = + Hashing.computeHashesWithSCCs + Canonical.emptySubstitution + types + fns + Map.empty + getDeps + + Expect.equal hashes1 hashes2 "mixed SCC hashes should be deterministic" + Expect.notEqual + (Map.find "Test.MyType" hashes1) + (Map.find "Test.myFn" hashes1) + "type and fn in mixed SCC should have different hashes" + + let (PT.Hash hTyp) = Map.findUnsafe "Test.MyType" hashes1 + let (PT.Hash hFn) = Map.findUnsafe "Test.myFn" hashes1 + Expect.isTrue (hTyp.Length = 64) "type hash should be 64 hex chars" + Expect.isTrue (hFn.Length = 64) "fn hash should be 64 hex chars" + } ] + - let mode : Canonical.HashRefMode = - { subst = Canonical.emptySubstitution - sccNames = - { byLocation = - [ locA, "Test.Scc.A"; locB, "Test.Scc.B" ] |> Map.ofList - byHash = [ sharedHash, "Test.Scc.B" ] |> Map.ofList } } - - let hashA = Hashing.computeValueHash mode (makeValue (valueRef locA)) - let hashB = Hashing.computeValueHash mode (makeValue (valueRef locB)) - - Expect.notEqual - hashA - hashB - "same-hash SCC refs at different locations should canonicalize to different FQN refs" - } - - - test "3-node cycle A->B->C->A gets stable hashes" { - let idA = PT.Hash "test-3cycle-A" - let idB = PT.Hash "test-3cycle-B" - let idC = PT.Hash "test-3cycle-C" - let typA = - { (makeType (PT.TypeDeclaration.Alias PT.TInt64)) with hash = idA } - let typB = - { (makeType (PT.TypeDeclaration.Alias PT.TString)) with hash = idB } - let typC = - { (makeType (PT.TypeDeclaration.Alias PT.TBool)) with hash = idC } - - let types = - [ ("Test.A", (typA, idA, None)) - ("Test.B", (typB, idB, None)) - ("Test.C", (typC, idC, None)) ] - |> Map.ofList - - // A->B->C->A cycle - let getDeps fqn = - if fqn = "Test.A" then [ "Test.B" ] - elif fqn = "Test.B" then [ "Test.C" ] - elif fqn = "Test.C" then [ "Test.A" ] - else [] - - let hashes1 = - Hashing.computeHashesWithSCCs - Canonical.emptySubstitution - types - Map.empty - Map.empty - getDeps - let hashes2 = - Hashing.computeHashesWithSCCs - Canonical.emptySubstitution - types - Map.empty - Map.empty - getDeps - - // Deterministic - Expect.equal hashes1 hashes2 "3-node SCC hashes should be deterministic" - - // All three items should get distinct hashes despite being in the same SCC - let hashA = Map.find "Test.A" hashes1 - let hashB = Map.find "Test.B" hashes1 - let hashC = Map.find "Test.C" hashes1 - Expect.notEqual hashA hashB "A and B should have different hashes" - Expect.notEqual hashB hashC "B and C should have different hashes" - Expect.notEqual hashA hashC "A and C should have different hashes" - } - - - test "3-node cycle is order-independent" { - let idA = PT.Hash "test-3cycle-A" - let idB = PT.Hash "test-3cycle-B" - let idC = PT.Hash "test-3cycle-C" - let typA = - { (makeType (PT.TypeDeclaration.Alias PT.TInt64)) with hash = idA } - let typB = - { (makeType (PT.TypeDeclaration.Alias PT.TString)) with hash = idB } - let typC = - { (makeType (PT.TypeDeclaration.Alias PT.TBool)) with hash = idC } - - let getDeps fqn = - if fqn = "Test.A" then [ "Test.B" ] - elif fqn = "Test.B" then [ "Test.C" ] - elif fqn = "Test.C" then [ "Test.A" ] - else [] - - // Declaration order 1: A, B, C - let types1 = - [ ("Test.A", (typA, idA, None)) - ("Test.B", (typB, idB, None)) - ("Test.C", (typC, idC, None)) ] - |> Map.ofList - - // Declaration order 2: C, A, B - let types2 = - [ ("Test.C", (typC, idC, None)) - ("Test.A", (typA, idA, None)) - ("Test.B", (typB, idB, None)) ] - |> Map.ofList - - let hashes1 = - Hashing.computeHashesWithSCCs - Canonical.emptySubstitution - types1 - Map.empty - Map.empty - getDeps - let hashes2 = - Hashing.computeHashesWithSCCs - Canonical.emptySubstitution - types2 - Map.empty - Map.empty - getDeps - - Expect.equal - (Map.find "Test.A" hashes1) - (Map.find "Test.A" hashes2) - "A hash should be same regardless of declaration order" - Expect.equal - (Map.find "Test.B" hashes1) - (Map.find "Test.B" hashes2) - "B hash should be same regardless of declaration order" - Expect.equal - (Map.find "Test.C" hashes1) - (Map.find "Test.C" hashes2) - "C hash should be same regardless of declaration order" - } - - - test "self-recursive type does not infinite loop and gets stable hash" { - let idTStr = "test-self-recursive" - let idT = PT.Hash idTStr - // A type that references itself (like a linked list node) - let typ = - { (makeType ( - PT.TypeDeclaration.Record( - NEList.ofListUnsafe - "" - [] - [ { name = "value"; typ = PT.TInt64; description = "" } - { name = "next" - typ = - PT.TCustomType( - PT.NameResolution.ok (PT.FQTypeName.fqPackage idTStr), - [] - ) - description = "" } ] - ) - )) with - hash = idT } - - let types = [ ("Test.T", (typ, idT, None)) ] |> Map.ofList - - // Self-loop: T depends on T - let getDeps fqn = if fqn = "Test.T" then [ "Test.T" ] else [] - - let hashes1 = - Hashing.computeHashesWithSCCs - Canonical.emptySubstitution - types - Map.empty - Map.empty - getDeps - let hashes2 = - Hashing.computeHashesWithSCCs - Canonical.emptySubstitution - types - Map.empty - Map.empty - getDeps - - // Should terminate and produce deterministic results - Expect.equal - hashes1 - hashes2 - "self-recursive type hash should be deterministic" - - // Should produce a valid hash - let (PT.Hash h) = Map.findUnsafe "Test.T" hashes1 - Expect.isTrue (h.Length = 64) "should be 64 hex chars (SHA-256)" - } - - - test "mixed cycle: type and fn that mutually depend on each other" { - let idTyp = PT.Hash "test-mixed-type" - let idFn = PT.Hash "test-mixed-fn" - - // A type that (via getDeps) depends on the function - let typ = - { (makeType (PT.TypeDeclaration.Alias PT.TInt64)) with hash = idTyp } - - // A function that (via getDeps) depends on the type - let fn = { (makeFn (eInt64 42)) with hash = idFn } - - let types = [ ("Test.MyType", (typ, idTyp, None)) ] |> Map.ofList - let fns = [ ("Test.myFn", (fn, idFn, None)) ] |> Map.ofList - - // MyType depends on myFn, myFn depends on MyType - let getDeps fqn = - if fqn = "Test.MyType" then [ "Test.myFn" ] - elif fqn = "Test.myFn" then [ "Test.MyType" ] - else [] - - let hashes1 = - Hashing.computeHashesWithSCCs - Canonical.emptySubstitution - types - fns - Map.empty - getDeps - let hashes2 = - Hashing.computeHashesWithSCCs - Canonical.emptySubstitution - types - fns - Map.empty - getDeps - - // Deterministic - Expect.equal hashes1 hashes2 "mixed SCC hashes should be deterministic" - - // Type and fn should get distinct hashes - Expect.notEqual - (Map.find "Test.MyType" hashes1) - (Map.find "Test.myFn" hashes1) - "type and fn in mixed SCC should have different hashes" - - // Both hashes should be valid SHA-256 - let (PT.Hash hTyp) = Map.findUnsafe "Test.MyType" hashes1 - let (PT.Hash hFn) = Map.findUnsafe "Test.myFn" hashes1 - Expect.isTrue (hTyp.Length = 64) "type hash should be 64 hex chars" - Expect.isTrue (hFn.Length = 64) "fn hash should be 64 hex chars" - } ] +let tests = + testList + "Hashing" + [ typeHashTests + fnHashTests + valueHashTests + opHashTests + commitHashTests + sccTests + placeholderHashTests + sccBatchTests alphaNormTests ] From 18f3d92a79ada80234c944a2f374ac9b2a54cd41 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 01:57:48 -0400 Subject: [PATCH 060/172] format: fantomas the Sync split files Co-Authored-By: Claude Opus 4.8 --- backend/src/Builtins/Builtins.Matter/Libs/Sync/Blobs.fs | 3 +-- backend/src/Builtins/Builtins.Matter/Libs/Sync/OpLog.fs | 2 +- backend/src/Builtins/Builtins.Matter/Libs/Sync/Store.fs | 3 +-- 3 files changed, 3 insertions(+), 5 deletions(-) diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Sync/Blobs.fs b/backend/src/Builtins/Builtins.Matter/Libs/Sync/Blobs.fs index f5a547d941..e9eed564da 100644 --- a/backend/src/Builtins/Builtins.Matter/Libs/Sync/Blobs.fs +++ b/backend/src/Builtins/Builtins.Matter/Libs/Sync/Blobs.fs @@ -127,7 +127,6 @@ let fns () : List = sqlSpec = NotQueryable previewable = Impure capabilities = LibExecution.Capabilities.noCaps - deprecated = NotDeprecated } - ] + deprecated = NotDeprecated } ] let builtins () = LibExecution.Builtin.make [] (fns ()) diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Sync/OpLog.fs b/backend/src/Builtins/Builtins.Matter/Libs/Sync/OpLog.fs index f10bcd6355..4b8ecd369d 100644 --- a/backend/src/Builtins/Builtins.Matter/Libs/Sync/OpLog.fs +++ b/backend/src/Builtins/Builtins.Matter/Libs/Sync/OpLog.fs @@ -444,6 +444,6 @@ let fns () : List = deprecated = NotDeprecated } - ] + ] let builtins () = LibExecution.Builtin.make [] (fns ()) diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Sync/Store.fs b/backend/src/Builtins/Builtins.Matter/Libs/Sync/Store.fs index 7bd002d61b..5b516c6ad2 100644 --- a/backend/src/Builtins/Builtins.Matter/Libs/Sync/Store.fs +++ b/backend/src/Builtins/Builtins.Matter/Libs/Sync/Store.fs @@ -43,7 +43,6 @@ let fns () : List = sqlSpec = NotQueryable previewable = Impure capabilities = LibExecution.Capabilities.noCaps - deprecated = NotDeprecated } - ] + deprecated = NotDeprecated } ] let builtins () = LibExecution.Builtin.make [] (fns ()) From 56068c63fe2d7421f0f96783b2d6b0a64cf7938a Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 02:21:06 -0400 Subject: [PATCH 061/172] comments: strip noise across the branch MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Branch-wide comment audit (4 parallel reviewers). Removed genuine noise only — name-restating doc lines (short/countOps/textCell/asInt, the // DB / // Sync section labels), duplicated rationales (OpLog's 'native/no per-row cost' ×4, the exec-vs-query dup in Sqlite, the reconcile-comment dup in EmbeddedResources, the created_at sentence duplicated in schema.sql), a PR-narrative line in a testfile, and two over-long guards (Stdin, PackageOpPlayback tie-break). Substantive WHY/invariant/footgun comments left intact. Suite green 9,954/0-fail. Co-Authored-By: Claude Opus 4.8 --- backend/migrations/schema.sql | 2 +- .../src/Builtins/Builtins.Cli/Libs/Stdin.fs | 11 +++-------- .../src/Builtins/Builtins.Matter/Builtin.fs | 18 ++++-------------- .../Builtins/Builtins.Matter/Libs/Sqlite.fs | 4 +--- .../Builtins.Matter/Libs/Sync/Blobs.fs | 3 --- .../Builtins.Matter/Libs/Sync/OpLog.fs | 8 +++----- backend/src/Cli/EmbeddedResources.fs | 3 --- backend/src/LibDB/PackageOpPlayback.fs | 11 ++++------- backend/testfiles/execution/cli/sync-unit.dark | 5 ++--- packages/darklang/cli/conflicts.dark | 1 - packages/darklang/cli/ops.dark | 3 --- packages/darklang/stdlib/sqlite.dark | 1 - 12 files changed, 18 insertions(+), 52 deletions(-) diff --git a/backend/migrations/schema.sql b/backend/migrations/schema.sql index 2448e37cbb..84197cdd0e 100644 --- a/backend/migrations/schema.sql +++ b/backend/migrations/schema.sql @@ -129,7 +129,7 @@ CREATE TABLE IF NOT EXISTS branch_ops ( applied INTEGER NOT NULL DEFAULT 0, -- 0=pending, 1=applied (for crash recovery) -- Authoring stamp, PORTABLE across sync (mirrors package_ops.origin_ts): a locally-authored op self-stamps, -- a SYNCED op preserves the peer's, so a structural op (rebase) converges by CREATION time (LWW) rather than - -- by arrival order. Distinct from `created_at` (local-insert time, differs per instance for the same op). + -- by arrival order. origin_ts TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now')), created_at TIMESTAMP NOT NULL DEFAULT (datetime('now')) ); diff --git a/backend/src/Builtins/Builtins.Cli/Libs/Stdin.fs b/backend/src/Builtins/Builtins.Cli/Libs/Stdin.fs index f63a0f4ad0..a5fb02501d 100644 --- a/backend/src/Builtins/Builtins.Cli/Libs/Stdin.fs +++ b/backend/src/Builtins/Builtins.Cli/Libs/Stdin.fs @@ -35,14 +35,9 @@ let private readKeyOrPaste () : ConsoleKeyInfo * string option = let isPrintable (k : ConsoleKeyInfo) = k.KeyChar <> '\u0000' && not (Char.IsControl k.KeyChar) - // Safety net for launching an interactive view without a terminal: when stdin is redirected — a pipe, a - // file, `< /dev/null`, a script, or a daemon — it's not a TTY. The full-screen views drive this in a tight - // key loop, and with no terminal `Console.ReadKey`/`Console.KeyAvailable` throw - // InvalidOperation_ConsoleReadKeyOnFile the moment the loop waits for a keypress — which would crash the - // view with a raw .NET stack trace (e.g. `dark < /dev/null`). We report Escape, which every - // full-screen view treats as "quit", so the view exits cleanly instead. A view could also bail up front via - // the `stdinIsInteractive` builtin; this guard is the last resort at the primitive that actually throws, so - // no key loop can blow up even if it forgets to check. + // Redirected stdin (pipe / file / `< /dev/null` / daemon) isn't a TTY, so `Console.ReadKey` throws + // InvalidOperation_ConsoleReadKeyOnFile mid-loop and crashes a full-screen view with a raw stack trace. + // Report Escape (every view treats it as "quit") so it exits cleanly instead. if Console.IsInputRedirected then (ConsoleKeyInfo('\u001b', ConsoleKey.Escape, false, false, false), None) else diff --git a/backend/src/Builtins/Builtins.Matter/Builtin.fs b/backend/src/Builtins/Builtins.Matter/Builtin.fs index ad9e699167..acab44be0e 100644 --- a/backend/src/Builtins/Builtins.Matter/Builtin.fs +++ b/backend/src/Builtins/Builtins.Matter/Builtin.fs @@ -12,21 +12,14 @@ let fnRenames : Builtin.FnRenames = [] let builtins (pm : PT.PackageManager) : Builtins = Builtin.combine - [ // DB - Libs.DB.builtins () - - // Sqlite (raw Stdlib.Sqlite access) + [ Libs.DB.builtins () Libs.Sqlite.builtins () - // Sync (internal machinery, split by concern) - Libs.Sync.Store.builtins () // store path + Release coordinate - Libs.Sync.OpLog.builtins () // op-log read/append wire (package/branch/resolutions) - Libs.Sync.Blobs.builtins () // content-addressed blob channel - - // Conflicts (dark conflicts UX) + Libs.Sync.Store.builtins () + Libs.Sync.OpLog.builtins () + Libs.Sync.Blobs.builtins () Libs.Conflicts.builtins () - // PM (package manager — packages, branches, ops, merge, …) Libs.PM.Packages.builtins pm Libs.PM.PackageOps.builtins pm Libs.PM.Branches.builtins () @@ -37,9 +30,6 @@ let builtins (pm : PT.PackageManager) : Builtins = Libs.PM.Seed.builtins Libs.PM.Caps.builtins - // Traces (reader surface) Libs.Traces.builtins () - - // Accounts Libs.Account.builtins () ] fnRenames diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs b/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs index d88660426d..3bf632bb0f 100644 --- a/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs +++ b/backend/src/Builtins/Builtins.Matter/Libs/Sqlite.fs @@ -81,9 +81,7 @@ let private execImpl return Dval.resultError KTInt KTString (DString e.Message) } -// query returns a `Result>, String>` (Ok rows / Error message) to match exec — a bad path -// or malformed SQL surfaces as a value, never an uncaught throw. Lets a caller read a peer's Release / op -// count (or its own config) without a throw taking down the caller. +// query mirrors exec: a bad path / malformed SQL surfaces as an Error value, never an uncaught throw. let private queryImpl (path : string) (sql : string) diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Sync/Blobs.fs b/backend/src/Builtins/Builtins.Matter/Libs/Sync/Blobs.fs index e9eed564da..ed94aa457d 100644 --- a/backend/src/Builtins/Builtins.Matter/Libs/Sync/Blobs.fs +++ b/backend/src/Builtins/Builtins.Matter/Libs/Sync/Blobs.fs @@ -12,9 +12,6 @@ module Dval = LibExecution.Dval let fns () : List = [ - // ── HTTP blob channel — package_blobs (a value's large content) don't ride the op stream, so after - // applying a peer's ops the puller fetches the blobs it now lacks. Content-addressed = idempotent. - // Sender: the blob MANIFEST — every content hash this instance holds, newline-joined (GET /sync/blobs). { name = fn "syncBlobManifest" 0 typeParams = [] diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Sync/OpLog.fs b/backend/src/Builtins/Builtins.Matter/Libs/Sync/OpLog.fs index 4b8ecd369d..0b0510ff67 100644 --- a/backend/src/Builtins/Builtins.Matter/Libs/Sync/OpLog.fs +++ b/backend/src/Builtins/Builtins.Matter/Libs/Sync/OpLog.fs @@ -18,8 +18,7 @@ let private eventLogEventType () = FQTypeName.fqPackage (EventLogRefs.event ()) let private eventLogCommitType () = FQTypeName.fqPackage (EventLogRefs.commit ()) let private eventLogCursorType () = FQTypeName.fqPackage (EventLogRefs.cursor ()) -/// Build the `Darklang.Sync.EventLog.Event` record for one op row — natively, so a 1000-op batch never pays the -/// per-row Dark interpreter cost the native read exists to avoid. +/// Build the `Darklang.Sync.EventLog.Event` record for one op row. let private eventRecord ((id, op, br, ch, ts) : string * string * string * string * string) : Dval = @@ -59,7 +58,7 @@ let private cursorValue (n : int64) : Dval = let private branchOpEventType () = FQTypeName.fqPackage (EventLogRefs.branchOpEvent ()) -/// Build the `Darklang.Sync.EventLog.BranchOpEvent` record for one branch_ops row — natively (no per-row Dark cost). +/// Build the `Darklang.Sync.EventLog.BranchOpEvent` record for one branch_ops row. let private branchOpEventRecord ((id, op, originTs) : string * string * string) : Dval = @@ -95,8 +94,7 @@ let private resolutionEventRecord "at", DString at ] ) -/// Read a string field out of an EventLog Event/Commit record (built by the peer + parsed from JSON) — -/// natively, so appending a 1000-op batch never pays the per-row Dark interpreter cost. +/// Read a string field out of an EventLog Event/Commit record (built by the peer + parsed from JSON). let private recField (name : string) (fields : Map) : string = match Map.tryFind name fields with | Some(DString s) -> s diff --git a/backend/src/Cli/EmbeddedResources.fs b/backend/src/Cli/EmbeddedResources.fs index 826ba2bac6..2f62925095 100644 --- a/backend/src/Cli/EmbeddedResources.fs +++ b/backend/src/Cli/EmbeddedResources.fs @@ -173,7 +173,6 @@ let private reseedStore (dbPath : string) (storedLabel : string) : string * int let peers = carryForwardPeers backup dbPath (backup, peers) -/// Back up + re-seed the store, then tell the user what happened and how to repopulate it. let private reseedAndReport (dbPath : string) (current : int) @@ -245,6 +244,4 @@ let extract () : unit = printfn "CLI data directory setup complete" else - // An existing store from a previous run/release — reconcile its Release with this binary's before any - // LibDB connection opens (a mismatch either refuses to open or re-seeds; a match is a no-op). reconcileExistingStore dbPath diff --git a/backend/src/LibDB/PackageOpPlayback.fs b/backend/src/LibDB/PackageOpPlayback.fs index a49c6042c8..6c7e31853f 100644 --- a/backend/src/LibDB/PackageOpPlayback.fs +++ b/backend/src/LibDB/PackageOpPlayback.fs @@ -342,13 +342,10 @@ let private applySetName let isStale = match curBinding, thisTs with - // Order a binding by its op's CREATION time (origin_ts); a stale op arriving late via sync loses - // to the newer binding. On an EXACT TIE (two DIFFERENT ops for one name stamped the same - // millisecond — a genuine cross-instance race), break deterministically by item hash: the higher - // hash wins. That tie-break is PORTABLE (content, not arrival/rowid), so every instance — and a - // from-scratch projection rebuild — converges on the same winner. Local sequential authoring - // (v2 replacing v1 in one batch) never reaches this tie: `Inserts` self-stamps each op in a - // local batch with a strictly-increasing origin_ts, so v2 is newer-by-creation and just wins. + // On an EXACT TIE (two DIFFERENT ops for one name stamped the same millisecond — a genuine + // cross-instance race), break by item hash: the higher wins. That tie-break is PORTABLE (content, + // not arrival/rowid), so every instance converges on the same winner. Local sequential authoring + // never ties — `Inserts` self-stamps each op with a strictly-increasing origin_ts. | Some(curHash, Some curTs), Some t when curHash <> itemHashStr -> Lww.isStale t itemHashStr curTs curHash | _ -> false diff --git a/backend/testfiles/execution/cli/sync-unit.dark b/backend/testfiles/execution/cli/sync-unit.dark index 3f0d43864f..56f2b35982 100644 --- a/backend/testfiles/execution/cli/sync-unit.dark +++ b/backend/testfiles/execution/cli/sync-unit.dark @@ -1,10 +1,9 @@ // Sync unit tests (pure + db-backed, no HTTP): the blob channel builtins and the adaptive daemon interval. // Cross-instance convergence over the real wire is covered by MultiInstance/SyncScenarios/SyncE2E. -// (Per-branch controls — follow/private — were removed; sync is wholesale, so their filters are gone.) // ── receive robustness: a malformed wire op is SKIPPED, never a crash ────────────────────────────────── -// The append path parses each event and drops any it can't (bad hex op / bad uuid) — "a bad peer skips, not -// crashes". A batch of only-garbage folds nothing and returns 0, totally, rather than throwing. +// The append path parses each event and drops any it can't (bad hex op / bad uuid); a batch of only +// garbage applies nothing and returns 0 rather than throwing. module AppendSkipsMalformedOp = (Darklang.Sync.EventLog.append [] diff --git a/packages/darklang/cli/conflicts.dark b/packages/darklang/cli/conflicts.dark index 9d7f351fe1..dccfe599ca 100644 --- a/packages/darklang/cli/conflicts.dark +++ b/packages/darklang/cli/conflicts.dark @@ -8,7 +8,6 @@ module Darklang.Cli.Conflicts let private conflicts () : List = Builtin.conflictsList () -// First 8 chars of a hash for compact display. let private short (h: String) : String = Stdlib.String.slice h 0 8 diff --git a/packages/darklang/cli/ops.dark b/packages/darklang/cli/ops.dark index e33dacb7d6..708375a1ba 100644 --- a/packages/darklang/cli/ops.dark +++ b/packages/darklang/cli/ops.dark @@ -7,15 +7,12 @@ module Darklang.Cli.Ops let private db () : String = Darklang.Sync.localDbPath () -/// First 8 chars of a hash/uuid for compact display. let private short (s: String) : String = if Stdlib.String.length s <= 8 then s else Stdlib.String.slice s 0 8 -/// A text cell from a Sqlite row for display, or "" if missing/non-text. let private textCell (row: Dict) (col: String) : String = (Stdlib.Sqlite.textField row col) |> Stdlib.Option.withDefault "" -/// Total ops in the log. let private countOps () : Int64 = (Stdlib.Sqlite.scalarInt (db ()) "SELECT count(*) AS n FROM package_ops" "n") |> Stdlib.Option.withDefault 0L diff --git a/packages/darklang/stdlib/sqlite.dark b/packages/darklang/stdlib/sqlite.dark index be5e935b4e..4410cb1139 100644 --- a/packages/darklang/stdlib/sqlite.dark +++ b/packages/darklang/stdlib/sqlite.dark @@ -18,7 +18,6 @@ let asText (v: Value) : Stdlib.Option.Option = | Text s -> Stdlib.Option.Option.Some s | _ -> Stdlib.Option.Option.None -/// The Int of an cell (Some), else None. let asInt (v: Value) : Stdlib.Option.Option = match v with | Int i -> Stdlib.Option.Option.Some i From 36af89e05b4871decd1823d1d749630781405203 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 13:02:59 -0400 Subject: [PATCH 062/172] sync: fix ops lost when committed out of authoring order (across branches) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit eventsSince paged by package_ops.rowid (authoring order), but an op only becomes syncable when COMMITTED — and commit UPDATEs it in place, keeping its early rowid. So authoring x on a feature branch, committing+syncing main, then committing the feature branch left x below the peer's cursor forever (the coworker's repro). Add a monotonic committed_seq (commit-order) stamp, assigned when an op is committed (Inserts commit path) or received (Seed.receiveOps); eventsSince now pages by committed_seq, so a late commit of an early-authored op is always served. Op-level pagination is preserved. Regression test in MultiInstance reproduces the scenario; full suite green (9,955, 0 failed). NOTE: schema.sql covers fresh stores + the (rebuilt) test DB; reaching existing Release-3 stores needs a Release-4 ALTER-TABLE+backfill migration (or reseed) — follow-up, pre-release. Co-Authored-By: Claude Opus 4.8 --- backend/migrations/schema.sql | 7 +++ backend/src/LibDB/Inserts.fs | 15 ++++- backend/src/LibDB/Seed.fs | 45 +++++++++------ backend/tests/Tests/MultiInstance.Tests.fs | 62 ++++++++++++++++++++- backend/tests/Tests/MultiInstanceHarness.fs | 6 +- 5 files changed, 114 insertions(+), 21 deletions(-) diff --git a/backend/migrations/schema.sql b/backend/migrations/schema.sql index 84197cdd0e..9a8ebfc1df 100644 --- a/backend/migrations/schema.sql +++ b/backend/migrations/schema.sql @@ -107,6 +107,11 @@ CREATE TABLE IF NOT EXISTS package_ops ( -- max(origin_ts) picks the same divergence winner → no swap. Distinct from `created_at` (which -- is local-insert time and differs per instance for the same op). origin_ts TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now')), + -- Monotonic COMMIT-order stamp (NULL while WIP), assigned when the op is committed or received. Sync reads + -- (`eventsSince`) page by this, NOT by rowid: rowid is authoring order, but an op becomes syncable only when + -- committed, which can be much later (WIP on one branch while another is committed + synced). Paging by + -- rowid would skip a late commit of an early-authored op forever; committed_seq can't. + committed_seq INTEGER, -- Composite, not bare `id`: an identical op authored on two branches hashes equal (the id is the op's -- content hash), so a bare-`id` INSERT OR IGNORE would drop the second and the fn would be invisible on -- that branch. (id, branch_id) lets IGNORE catch only true within-branch repeats. @@ -118,6 +123,8 @@ CREATE INDEX IF NOT EXISTS idx_package_ops_created ON package_ops(created_at); CREATE INDEX IF NOT EXISTS idx_package_ops_applied ON package_ops(applied) WHERE applied = 0; CREATE INDEX IF NOT EXISTS idx_package_ops_commit_hash ON package_ops(commit_hash); +CREATE INDEX IF NOT EXISTS idx_package_ops_committed_seq + ON package_ops(committed_seq) WHERE committed_seq IS NOT NULL; -- Partial index on propagation_id for efficient lookups (only non-null values) CREATE INDEX IF NOT EXISTS idx_package_ops_propagation_id ON package_ops(propagation_id) WHERE propagation_id IS NOT NULL; diff --git a/backend/src/LibDB/Inserts.fs b/backend/src/LibDB/Inserts.fs index e70d14c7c1..152abfc4a7 100644 --- a/backend/src/LibDB/Inserts.fs +++ b/backend/src/LibDB/Inserts.fs @@ -470,7 +470,20 @@ and commitWipOpsByIds let projStmts = projectionStatements commitHashStr branchId allSelected selectedOps - let statements = [ branchOpStmt; commitStmt ] @ projStmts + // Stamp each committed op with a monotonic COMMIT-order `committed_seq`, so sync (`eventsSince`) + // pages by commit order, not authoring order (rowid). Single-writer SCM, so MAX+i is race-free. + let! seqBase = + Sql.query "SELECT COALESCE(MAX(committed_seq), 0) AS m FROM package_ops" + |> Sql.executeRowAsync (fun read -> read.int64 "m") + let seqStmts = + selectedOps + |> List.mapi (fun i (opId, _) -> + ("UPDATE package_ops SET committed_seq = @seq WHERE id = @id AND branch_id = @branch_id", + [ [ "seq", Sql.int64 (seqBase + int64 (i + 1)) + "id", Sql.uuid opId + "branch_id", Sql.uuid branchId ] ])) + + let statements = [ branchOpStmt; commitStmt ] @ projStmts @ seqStmts let _ = Sql.executeTransactionSync statements diff --git a/backend/src/LibDB/Seed.fs b/backend/src/LibDB/Seed.fs index 7a5ed0a76b..a525457ea1 100644 --- a/backend/src/LibDB/Seed.fs +++ b/backend/src/LibDB/Seed.fs @@ -234,10 +234,15 @@ let applyUnappliedOps () : Task = } -/// The committed events after `cursor` (≤ `limit`), the commits they reference, and the new cursor (max -/// rowid, or `cursor` if nothing new) — what a peer serves. Native so a large batch is milliseconds, not the -/// seconds a per-row Dark fold would cost. Event = (id, opBlobHex, branchId, commitHash, originTs); commit = -/// (hash, message, branchId, accountId, createdAt). +/// The committed events after `cursor` (≤ `limit`), the commits they reference, and the new cursor — what a +/// peer serves. +/// +/// The cursor is `committed_seq`, NOT `rowid`. `rowid` is an op's AUTHORING order, but an op only becomes +/// syncable when it's COMMITTED, which can happen much later than it was authored (e.g. a WIP op on branch X +/// while branch Y is committed + synced). `committed_seq` is assigned when the op is committed (or received), +/// so it reflects COMMIT order: a late commit of an early-authored op gets a high seq and is served after the +/// cursor has passed the earlier commits — never skipped. Native so a large batch is milliseconds. Event = +/// (id, opBlobHex, branchId, commitHash, originTs); commit = (hash, message, branchId, accountId, createdAt). let eventsSince (cursor : int64) (limit : int64) @@ -248,13 +253,13 @@ let eventsSince task { let! opRows = Sql.query - $"SELECT rowid AS rid, id, hex(op_blob) AS blob, branch_id, commit_hash, origin_ts + $"SELECT committed_seq AS cseq, id, hex(op_blob) AS blob, branch_id, commit_hash, origin_ts FROM package_ops - WHERE rowid > {cursor} AND commit_hash IS NOT NULL - ORDER BY rowid + WHERE committed_seq > {cursor} AND commit_hash IS NOT NULL + ORDER BY committed_seq LIMIT {limit}" |> Sql.executeAsync (fun read -> - (read.int64 "rid", + (read.int64 "cseq", read.string "id", read.string "blob", read.string "branch_id", @@ -267,17 +272,17 @@ let eventsSince let newCursor = match opRows with | [] -> cursor - | rows -> rows |> List.map (fun (rid, _, _, _, _, _) -> rid) |> List.max + | rows -> rows |> List.map (fun (cseq, _, _, _, _, _) -> cseq) |> List.max - // Only the commits the batch's ops reference (rowid in (cursor, newCursor]) — a bounded event batch - // carries a bounded set of commits, never the whole commit history. + // Only the commits the batch's ops reference (committed_seq in (cursor, newCursor]) — a bounded event + // batch carries a bounded set of commits, never the whole commit history. let! commits = Sql.query $"SELECT DISTINCT c.hash AS hash, c.message AS message, c.branch_id AS branch_id, c.account_id AS account_id, c.created_at AS created_at FROM commits c JOIN package_ops o ON o.commit_hash = c.hash - WHERE o.rowid > {cursor} AND o.rowid <= {newCursor}" + WHERE o.committed_seq > {cursor} AND o.committed_seq <= {newCursor}" |> Sql.executeAsync (fun read -> (read.string "hash", read.string "message", @@ -378,9 +383,16 @@ let receiveOps "created_at", Sql.string createdAt ] (sql, [ ps ])) + // A received op arrives already committed, so it gets a `committed_seq` on insert (a monotonic + // COMMIT-order stamp local to this store) — that's what this instance serves onward by. Kept on + // CONFLICT so a re-pulled op keeps its original seq. Single-writer, so MAX+i is race-free. + let! seqBase = + Sql.query "SELECT COALESCE(MAX(committed_seq), 0) AS m FROM package_ops" + |> Sql.executeRowAsync (fun read -> read.int64 "m") + let opInserts = events - |> List.map (fun (opId, opBlob, branchId, commitHash, originTs) -> + |> List.mapi (fun i (opId, opBlob, branchId, commitHash, originTs) -> // Convergence fix (canonical origin_ts): the op id is content-only, so two instances that // independently author the SAME op stamp it with different local `origin_ts`. If we kept // first-writer's stamp (INSERT OR IGNORE), a later competing edit could resolve differently on each @@ -390,8 +402,8 @@ let receiveOps let sql = """ INSERT INTO package_ops - (id, op_blob, branch_id, applied, commit_hash, propagation_id, origin_ts) - VALUES (@id, @op_blob, @branch_id, @applied, @commit_hash, @propagation_id, @origin_ts) + (id, op_blob, branch_id, applied, commit_hash, propagation_id, origin_ts, committed_seq) + VALUES (@id, @op_blob, @branch_id, @applied, @commit_hash, @propagation_id, @origin_ts, @committed_seq) ON CONFLICT(id, branch_id) DO UPDATE SET origin_ts = MIN(package_ops.origin_ts, excluded.origin_ts), applied = @@ -405,7 +417,8 @@ let receiveOps "applied", Sql.bool false "commit_hash", Sql.string commitHash "propagation_id", Sql.dbnull - "origin_ts", Sql.string originTs ] + "origin_ts", Sql.string originTs + "committed_seq", Sql.int64 (seqBase + int64 (i + 1)) ] (sql, [ ps ])) let _ = (commitInserts @ opInserts) |> Sql.executeTransactionSync diff --git a/backend/tests/Tests/MultiInstance.Tests.fs b/backend/tests/Tests/MultiInstance.Tests.fs index 96076b2ab9..ae41739323 100644 --- a/backend/tests/Tests/MultiInstance.Tests.fs +++ b/backend/tests/Tests/MultiInstance.Tests.fs @@ -712,11 +712,71 @@ let viewsRealSeededItem = } +let opCommittedLateAcrossBranchesStillSyncs = + testTask + "an op authored early but committed late (on another branch) is still served by eventsSince" { + // Regression (coworker repro): author x on a feature branch, author y on main, commit + sync main, THEN + // commit the feature branch. sync used to page by op rowid (authoring order), but an op only becomes + // syncable when COMMITTED — so x, authored first (low rowid) but committed after the cursor passed it, + // was skipped forever. eventsSince now pages by committed_seq (commit order), so the late commit is served. + let! a = seededInstance "a" + activate a + + let featureId = System.Guid.NewGuid() + let! _ = + Seed.receiveBranchOps + [ branchEvent ( + PT.BranchOp.CreateBranch( + featureId, + "syncfeature", + Some PT.mainBranchId, + None + ) + ) ] + + let! (fnLost, fnSeen) = twoFunctionHashes () + let lostLoc : PT.PackageLocation = + { owner = "SyncTest"; modules = [ "Lost" ]; name = "x" } + let seenLoc : PT.PackageLocation = + { owner = "SyncTest"; modules = [ "Seen" ]; name = "y" } + let lostOp = + PT.PackageOp.SetName(lostLoc, PT.Reference.PackageFn(PT.Hash fnLost)) + let seenOp = + PT.PackageOp.SetName(seenLoc, PT.Reference.PackageFn(PT.Hash fnSeen)) + let lostOpId = string (LibDB.Inserts.computeOpHash lostOp) + + // author x on the feature branch (lower rowid), then y on main — both WIP + let! _ = LibDB.Inserts.insertAndApplyOpsAsWip featureId [ lostOp ] + let! _ = LibDB.Inserts.insertAndApplyOpsAsWip PT.mainBranchId [ seenOp ] + + let! cur0 = currentCursor () + + // commit + "sync" main: the peer reads events since cur0 and its cursor advances past y + let! _ = + LibDB.Inserts.commitWipOps Account.IDs.darklang PT.mainBranchId "on main" + let! (_, batch1, c1) = Seed.eventsSince cur0 100000L + Expect.isGreaterThan c1 cur0 "the cursor advanced past the main commit" + Expect.isFalse + (batch1 |> List.exists (fun (id, _, _, _, _) -> id = lostOpId)) + "x isn't served yet (still WIP on the feature branch)" + + // NOW commit the feature branch — x is authored-early but committed-late + let! _ = LibDB.Inserts.commitWipOps Account.IDs.darklang featureId "late commit" + let! (_, batch2, _) = Seed.eventsSince c1 100000L + + Expect.isTrue + (batch2 |> List.exists (fun (id, _, _, _, _) -> id = lostOpId)) + "x IS served after its late commit — not lost below the cursor" + teardown [ a ] + } + + let tests = testSequenced <| testList "MultiInstance" - [ freshInstancesAreIsolated + [ opCommittedLateAcrossBranchesStillSyncs + freshInstancesAreIsolated branchIdentityIsGlobal freshSchemaStoreRunsSyncPath packageRenameConverges diff --git a/backend/tests/Tests/MultiInstanceHarness.fs b/backend/tests/Tests/MultiInstanceHarness.fs index 58c8eed4ba..b178b54e5f 100644 --- a/backend/tests/Tests/MultiInstanceHarness.fs +++ b/backend/tests/Tests/MultiInstanceHarness.fs @@ -167,10 +167,10 @@ let twoFunctionHashes () : Task = | _ -> return Exception.raiseInternal "seed needs >= 2 functions" [] } -/// The active instance's current op-log high-water mark, so a later `eventsSince` returns only NEW ops -/// (not the whole seed). +/// The active instance's current sync high-water mark (max `committed_seq` — the coordinate `eventsSince` +/// pages by), so a later `eventsSince` returns only NEW committed ops (not the whole seed). let currentCursor () : Task = - Sql.query "SELECT COALESCE(MAX(rowid), 0) AS c FROM package_ops" + Sql.query "SELECT COALESCE(MAX(committed_seq), 0) AS c FROM package_ops" |> Sql.executeRowAsync (fun read -> read.int64 "c") /// The count of unreviewed conflicts recorded on the active instance. From 101853116541a910aea68a2bf97d2ce17d3a7c72 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 13:16:38 -0400 Subject: [PATCH 063/172] sync: Release-4 durable migration for committed_seq (reach existing stores) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The committed_seq fix covers fresh stores (schema.sql) + the rebuilt test DB, but CREATE TABLE IF NOT EXISTS can't add the column to an existing Release-3 store. Add Release 4: a durable ALTER TABLE package_ops ADD committed_seq + backfill by rowid (op log preserved, no clean-break). Dropped the committed_seq index from schema.sql — it ran during the schema bootstrap before the Release migrator added the column, breaking existing stores; committed_seq is unindexed for now (fine at dev scale). Suite green 9,955/0-fail. Co-Authored-By: Claude Opus 4.8 --- backend/migrations/schema.sql | 2 -- backend/src/LibDB/Releases.fs | 21 ++++++++++++++++----- backend/tests/Tests/Releases.Tests.fs | 4 ++-- 3 files changed, 18 insertions(+), 9 deletions(-) diff --git a/backend/migrations/schema.sql b/backend/migrations/schema.sql index 9a8ebfc1df..4bf3f22824 100644 --- a/backend/migrations/schema.sql +++ b/backend/migrations/schema.sql @@ -123,8 +123,6 @@ CREATE INDEX IF NOT EXISTS idx_package_ops_created ON package_ops(created_at); CREATE INDEX IF NOT EXISTS idx_package_ops_applied ON package_ops(applied) WHERE applied = 0; CREATE INDEX IF NOT EXISTS idx_package_ops_commit_hash ON package_ops(commit_hash); -CREATE INDEX IF NOT EXISTS idx_package_ops_committed_seq - ON package_ops(committed_seq) WHERE committed_seq IS NOT NULL; -- Partial index on propagation_id for efficient lookups (only non-null values) CREATE INDEX IF NOT EXISTS idx_package_ops_propagation_id ON package_ops(propagation_id) WHERE propagation_id IS NOT NULL; diff --git a/backend/src/LibDB/Releases.fs b/backend/src/LibDB/Releases.fs index 17b11d6f58..0e91e0f06e 100644 --- a/backend/src/LibDB/Releases.fs +++ b/backend/src/LibDB/Releases.fs @@ -23,7 +23,7 @@ open LibDB.Sqlite /// THE version coordinate (see the module doc). A store is stamped with this Release; older code refuses /// to open a store stamped NEWER, and cross-instance sync uses this same integer as its wire-format version. -let currentRelease : int = 3 +let currentRelease : int = 4 /// One forward step that ARRIVES at Release `n` (apply it to move a store from `n-1` to `n`). type Release = @@ -47,11 +47,22 @@ type Release = /// migrator does the rest. Each `n` must be exactly one greater than the previous (see /// `registryIsWellFormed`). /// -/// **Release 3 — meaning-stable hashing.** Hashes are now over the alpha-normalized canonical form, so -/// older `op_blob`s embed stale hashes and can't be cheaply migrated — hence the CLEAN-BREAK marker. Every -/// store is BORN at Release 3 and never replays this step; it's the worked example of the clean-break path. +/// **Release 3 — meaning-stable hashing.** Hashes are now over the alpha-normalized canonical form, so older +/// `op_blob`s embed stale hashes and can't be cheaply migrated — hence the CLEAN-BREAK marker. A fresh store +/// is born at the current Release and never replays this step; it's the worked example of the clean-break path. +/// +/// **Release 4 — sync commit-order stamp.** Adds `package_ops.committed_seq` (the coordinate sync's +/// `eventsSince` pages by) and backfills existing committed ops by rowid — a DURABLE step (the op log is +/// preserved). Fresh stores get the column from schema.sql; this step is only for a real Release-3 → 4 store. let releases : Release list = - [ { n = 3; sql = ""; reserialize = None; clearForRebuild = true } ] + [ { n = 3; sql = ""; reserialize = None; clearForRebuild = true } + { n = 4 + sql = + "ALTER TABLE package_ops ADD COLUMN committed_seq INTEGER;" + + " UPDATE package_ops SET committed_seq = rowid" + + " WHERE commit_hash IS NOT NULL AND committed_seq IS NULL" + reserialize = None + clearForRebuild = false } ] // ── The pure planning half (unit-tested; takes the registry explicitly so tests inject their own) ── diff --git a/backend/tests/Tests/Releases.Tests.fs b/backend/tests/Tests/Releases.Tests.fs index 3ebaf84f36..0f06e5cd08 100644 --- a/backend/tests/Tests/Releases.Tests.fs +++ b/backend/tests/Tests/Releases.Tests.fs @@ -117,8 +117,8 @@ let v2UpgradesToCurrent = |> List.map (fun r -> r.n) Expect.equal steps - [ 3 ] - "store 2 → code 3 applies exactly Release 3 (the clean-break)" + [ 3; 4 ] + "store 2 → code 4 applies Release 3 (clean-break) then Release 4 (committed_seq)" } // planRelease — the boot-guard DECISION, pure so the refuse-newer safety property is unit-tested without From 303f96d581a2ae57e60821df59165f7e5a643f57 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 19:39:46 -0400 Subject: [PATCH 064/172] Fix discard reverting a synced resolution (R1); harden equal-hash fold (origin_ts) R1: the resolution overlay in "locations" was written with commit_hash NULL, indistinguishable from a WIP binding, so "discard" (DELETE ... WHERE commit_hash IS NULL) swept it and silently reverted the location to the LWW loser while the "resolutions" row survived -> divergence from a peer that synced the resolution. Add a "source" column ('op' default | 'resolution' overlay); tag the overlay and exclude it in both the un-deprecate and the DELETE of discardWipOps. "locations" is a projection, so the column rides the schema-hash refold (no Release step). Regression test resolutionSurvivesDiscard (RED-GREEN verified). #3: an equal-hash SetName re-apply re-stamped the binding with the incoming op's origin_ts. The live divergence is already prevented by receiveOps' MIN-reconcile, but the fold now self-corrects (keeps the earliest origin_ts) so it is correct for any caller. Test identicalContentAuthoringConverges. --- backend/migrations/schema.sql | 7 +- backend/src/LibDB/Inserts.fs | 4 +- backend/src/LibDB/PackageOpPlayback.fs | 8 ++ backend/src/LibDB/Resolutions.fs | 4 +- backend/tests/Tests/MultiInstance.Tests.fs | 98 ++++++++++++++++++++++ 5 files changed, 117 insertions(+), 4 deletions(-) diff --git a/backend/migrations/schema.sql b/backend/migrations/schema.sql index 4bf3f22824..0fc74e93de 100644 --- a/backend/migrations/schema.sql +++ b/backend/migrations/schema.sql @@ -238,7 +238,12 @@ CREATE TABLE IF NOT EXISTS locations ( -- playback order by CREATION, not arrival (timestamp-LWW). A SetName whose op was created -- EARLIER than the current binding (an old op arriving late via sync) is stale: playback skips -- the rebind, so the latest-by-creation name wins on every instance regardless of sync order. - origin_ts TEXT NULL + origin_ts TEXT NULL, + -- What put this binding here: 'op' = the normal op-fold (incl. WIP authoring), 'resolution' = a + -- human/keep-local resolution OVERLAY. Both an overlay and a WIP binding have commit_hash NULL, so + -- without this marker `discard` (which deletes WIP by commit_hash IS NULL) would also sweep the + -- overlay and silently revert a synced resolution → divergence. `discard` excludes 'resolution'. + source TEXT NOT NULL DEFAULT 'op' ); CREATE INDEX IF NOT EXISTS idx_locations_branch_lookup ON locations(branch_id, owner, modules, name, item_type) diff --git a/backend/src/LibDB/Inserts.fs b/backend/src/LibDB/Inserts.fs index 152abfc4a7..8d5b7ffddd 100644 --- a/backend/src/LibDB/Inserts.fs +++ b/backend/src/LibDB/Inserts.fs @@ -625,6 +625,7 @@ let discardWipOps (branchId : PT.BranchId) : Task> = AND committed_loc.unlisted_at IS NOT NULL WHERE wip_loc.branch_id = @branch_id AND wip_loc.commit_hash IS NULL + AND wip_loc.source <> 'resolution' AND NOT EXISTS ( SELECT 1 FROM locations active WHERE active.owner = wip_loc.owner @@ -650,7 +651,8 @@ let discardWipOps (branchId : PT.BranchId) : Task> = """, branchParam) - ("DELETE FROM locations WHERE branch_id = @branch_id AND commit_hash IS NULL", + ("DELETE FROM locations WHERE branch_id = @branch_id AND commit_hash IS NULL \ + AND source <> 'resolution'", branchParam) ("DELETE FROM deprecations WHERE branch_id = @branch_id AND commit_hash IS NULL", diff --git a/backend/src/LibDB/PackageOpPlayback.fs b/backend/src/LibDB/PackageOpPlayback.fs index 6c7e31853f..299501f3f9 100644 --- a/backend/src/LibDB/PackageOpPlayback.fs +++ b/backend/src/LibDB/PackageOpPlayback.fs @@ -348,6 +348,14 @@ let private applySetName // never ties — `Inserts` self-stamps each op with a strictly-increasing origin_ts. | Some(curHash, Some curTs), Some t when curHash <> itemHashStr -> Lww.isStale t itemHashStr curTs curHash + // Same content re-applied (a re-pull, or two instances that independently authored identical bytes for + // this name): keep the EARLIEST origin_ts so the binding's stamp is identical on every instance + // regardless of fold/arrival order. Skip unless this op is strictly earlier (then re-bind to lower it). + // Without this the fold would re-stamp the binding with a LATER equal-hash op, and a different-hash op + // stamped between the two could then win on one instance and lose on another → divergence. (receiveOps' + // MIN-reconcile already keeps ops from arriving with a raised stamp; this makes the fold correct on its + // own, for any caller.) + | Some(curHash, Some curTs), Some t when curHash = itemHashStr -> t >= curTs | _ -> false if isStale then diff --git a/backend/src/LibDB/Resolutions.fs b/backend/src/LibDB/Resolutions.fs index 3b4113238c..673808b446 100644 --- a/backend/src/LibDB/Resolutions.fs +++ b/backend/src/LibDB/Resolutions.fs @@ -130,8 +130,8 @@ let applyToLocations (r : Resolution) : Task = Sql.query """ INSERT INTO locations - (location_id, item_hash, owner, modules, name, item_type, branch_id, commit_hash, origin_ts) - VALUES (@lid, @hash, @owner, @modules, @name, @itemType, @branchID, NULL, @at) + (location_id, item_hash, owner, modules, name, item_type, branch_id, commit_hash, origin_ts, source) + VALUES (@lid, @hash, @owner, @modules, @name, @itemType, @branchID, NULL, @at, 'resolution') """ |> Sql.parameters [ "lid", Sql.string (System.Guid.NewGuid() |> string) diff --git a/backend/tests/Tests/MultiInstance.Tests.fs b/backend/tests/Tests/MultiInstance.Tests.fs index ae41739323..6eb479572f 100644 --- a/backend/tests/Tests/MultiInstance.Tests.fs +++ b/backend/tests/Tests/MultiInstance.Tests.fs @@ -467,6 +467,102 @@ let resolutionSurvivesIncrementalFold = } +let resolutionSurvivesDiscard = + testTask + "a human resolution survives `discard` of WIP ops (the overlay is not WIP)" { + // `discard` deletes WIP bindings (commit_hash IS NULL). A resolution overlay is ALSO commit_hash NULL, + // so without the `source` marker discard would sweep it too — silently reverting the location to the LWW + // loser while the `resolutions` row survives → divergence from a peer that synced the resolution. + let! a = seededInstance "resdiscard" + + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "ResDiscard" ]; name = "pick" } + activate a + let! (fnA, fnB) = twoFunctionHashes () + let! commit = existingCommit () + // fnB is the committed LWW winner (.200 > .100); a human overrides back to fnA at a later `at`. + let! _ = + Seed.receiveOps [] [ setNameEvent loc fnA commit "2026-07-08T00:00:00.100Z" ] + let! _ = + Seed.receiveOps [] [ setNameEvent loc fnB commit "2026-07-08T00:00:00.200Z" ] + let res = + Resolutions.mk + loc + (PT.Reference.PackageFn(PT.Hash fnA)) + "human" + PT.mainBranchId + "2026-07-08T00:00:00.300Z" + do! Resolutions.recordAndApply res + let! beforeDiscard = liveHash loc + Expect.equal beforeDiscard [ fnA ] "the override took (fnA over the LWW winner fnB)" + + // An UNRELATED WIP op, so discard actually runs (it's a no-op with zero WIP ops). Bind to fnB (not fnA) + // so the rename path can't touch the overlay's item_hash. + let wipLoc : PT.PackageLocation = + { owner = "Test"; modules = [ "ResDiscard" ]; name = "scratch" } + let! _ = + LibDB.Inserts.insertAndApplyOpsAsWip + PT.mainBranchId + [ PT.PackageOp.SetName(wipLoc, PT.Reference.PackageFn(PT.Hash fnB)) ] + + let! _ = LibDB.Inserts.discardWipOps PT.mainBranchId + let! afterDiscard = liveHash loc + Expect.equal + afterDiscard + [ fnA ] + "the resolution SURVIVED discard (else it reverts to the LWW loser fnB)" + teardown [ a ] + } + + +let identicalContentAuthoringConverges = + testTask + "two instances authoring identical content for one name converge, so a later edit resolves the same" { + // Same name, same content (fnX), authored on two instances at DIFFERENT local stamps. The op id is + // content-only, so it's one op arriving with two stamps; it must settle to the SAME origin_ts on both + // (the MIN reconcile + an equal-hash fold that never raises the stamp) — otherwise a later different-hash + // op stamped BETWEEN the two would win on one instance and lose on the other → divergence. + let! a = seededInstance "conva" + let! b = seededInstance "convb" + + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "SameContent" ]; name = "pick" } + + activate a + let! (fnX, fnY) = twoFunctionHashes () + let! commit = existingCommit () + let! curA = currentCursor () + let! _ = + Seed.receiveOps [] [ setNameEvent loc fnX commit "2026-07-08T00:00:00.200Z" ] // A stamps fnX .200 + let! (commitsA, eventsA) = wireSince curA + + activate b + let! curB = currentCursor () + let! _ = + Seed.receiveOps [] [ setNameEvent loc fnX commit "2026-07-08T00:00:00.100Z" ] // B stamps the SAME op .100 + let! (commitsB, eventsB) = wireSince curB + + // Cross-sync the identical-content op; both must reconcile to the earliest stamp (.100). + activate b + let! _ = Seed.receiveOps commitsA eventsA + activate a + let! _ = Seed.receiveOps commitsB eventsB + + // A later, DIFFERENT-hash edit (.150) folds on both — .150 out-ranks the reconciled .100 on each. + let mid = setNameEvent loc fnY commit "2026-07-08T00:00:00.150Z" + activate a + let! _ = Seed.receiveOps [] [ mid ] + let! aFinal = liveHash loc + activate b + let! _ = Seed.receiveOps [] [ mid ] + let! bFinal = liveHash loc + + Expect.equal aFinal bFinal "both instances converge on the same binding for the name" + Expect.equal aFinal [ fnY ] "the later different-hash edit wins on both (reconciled stamp is .100 < .150)" + teardown [ a; b ] + } + + let durableReleaseMigratesInPlace = testTask "a durable Release migrates a seeded store IN PLACE, preserving its data (not a clean-break)" { @@ -787,6 +883,8 @@ let tests = resolutionConverges resolutionSurvivesRebuild resolutionSurvivesIncrementalFold + resolutionSurvivesDiscard + identicalContentAuthoringConverges durableReleaseMigratesInPlace branchMergeSyncs concurrentRebasesConverge From cf725d0a1d7349573d2d596f3b82f6750e6ae287 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 20:09:46 -0400 Subject: [PATCH 065/172] Tighten sync review items: conflictId item_kind; linear pull-error list; more tests conflictId now hashes item_kind, so a fn-kind and a type-kind divergence at the same name with the same candidate hashes stay distinct records instead of collapsing to one id (a name can hold a fn AND a type at once). Test conflictIdDistinguishesItemKind. cli/sync.dark: replace the O(n^2) fold + List.append tail-append of pull errors with a linear filterMap. Add resolutionSurvivesDiscardAfterRebuild: a resolution overlay must survive a `discard` even after a projection rebuild, which guards that reapplyAll re-tags the rebuilt overlay source='resolution'. --- backend/src/LibDB/Conflicts.fs | 8 +- backend/tests/Tests/MultiInstance.Tests.fs | 85 ++++++++++++++++++++++ packages/darklang/cli/sync.dark | 6 +- 3 files changed, 94 insertions(+), 5 deletions(-) diff --git a/backend/src/LibDB/Conflicts.fs b/backend/src/LibDB/Conflicts.fs index 3b395a31d0..dba35b072a 100644 --- a/backend/src/LibDB/Conflicts.fs +++ b/backend/src/LibDB/Conflicts.fs @@ -53,10 +53,14 @@ let parseLocation (s : string) : PT.PackageLocation = let private conflictId (branchId : System.Guid) (location : string) + (itemKind : string) (localHash : string) (incomingHash : string) : string = - let raw = $"{branchId}|{location}|{localHash}|{incomingHash}" + // item_kind is part of the identity: a name can hold a fn AND a type at once, so a fn-kind and a + // type-kind divergence at the same location are DISTINCT conflicts. Omitting it would collapse them to + // one id and INSERT OR IGNORE would drop the second. + let raw = $"{branchId}|{location}|{itemKind}|{localHash}|{incomingHash}" System.Security.Cryptography.SHA256.HashData( System.Text.Encoding.UTF8.GetBytes raw @@ -82,7 +86,7 @@ let record (@id, @branch_id, @location, @item_kind, @local_hash, @incoming_hash, @chosen_hash, @resolved_by, 'auto-resolved') """ |> Sql.parameters - [ "id", Sql.string (conflictId branchId location localHash incomingHash) + [ "id", Sql.string (conflictId branchId location itemKind localHash incomingHash) "branch_id", Sql.string (string branchId) "location", Sql.string location "item_kind", Sql.string itemKind diff --git a/backend/tests/Tests/MultiInstance.Tests.fs b/backend/tests/Tests/MultiInstance.Tests.fs index 6eb479572f..b0ecbba38e 100644 --- a/backend/tests/Tests/MultiInstance.Tests.fs +++ b/backend/tests/Tests/MultiInstance.Tests.fs @@ -563,6 +563,89 @@ let identicalContentAuthoringConverges = } +let resolutionSurvivesDiscardAfterRebuild = + testTask + "a resolution survives `discard` even after a projection rebuild (reapplyAll re-tags the overlay)" { + // rebuildProjections re-derives `locations` from the op log and re-applies the overlay via reapplyAll — + // which must re-tag it source='resolution', or a later discard would sweep the rebuilt overlay. Guards + // the marker across a full re-fold (not just the freshly-authored path). + let! a = seededInstance "resdiscardrebuild" + + let loc : PT.PackageLocation = + { owner = "Test"; modules = [ "ResDiscardRebuild" ]; name = "pick" } + activate a + let! (fnA, fnB) = twoFunctionHashes () + let! commit = existingCommit () + let! _ = + Seed.receiveOps [] [ setNameEvent loc fnA commit "2026-07-08T00:00:00.100Z" ] + let! _ = + Seed.receiveOps [] [ setNameEvent loc fnB commit "2026-07-08T00:00:00.200Z" ] + let res = + Resolutions.mk + loc + (PT.Reference.PackageFn(PT.Hash fnA)) + "human" + PT.mainBranchId + "2026-07-08T00:00:00.300Z" + do! Resolutions.recordAndApply res + let! _ = Seed.rebuildProjections () // overlay re-applied via reapplyAll — must re-tag source + let! afterRebuild = liveHash loc + Expect.equal afterRebuild [ fnA ] "override survived the rebuild" + + let wipLoc : PT.PackageLocation = + { owner = "Test"; modules = [ "ResDiscardRebuild" ]; name = "scratch" } + let! _ = + LibDB.Inserts.insertAndApplyOpsAsWip + PT.mainBranchId + [ PT.PackageOp.SetName(wipLoc, PT.Reference.PackageFn(PT.Hash fnB)) ] + let! _ = LibDB.Inserts.discardWipOps PT.mainBranchId + let! afterDiscard = liveHash loc + Expect.equal + afterDiscard + [ fnA ] + "override survived discard AFTER a rebuild (source was re-tagged by reapplyAll)" + teardown [ a ] + } + + +let conflictIdDistinguishesItemKind = + testTask + "conflicts at one location with the same hashes but different item kinds stay distinct" { + // conflictId hashes item_kind, so a fn-kind and a type-kind divergence at the same name with the same + // candidate hashes are two records — not one collapsed by INSERT OR IGNORE. (A name can hold a fn AND a + // type at once, so both are real.) + let! a = seededInstance "conflictkind" + activate a + let locStr = "Test.KindConflict.dup" + do! + LibDB.Conflicts.record + PT.mainBranchId + locStr + "fn" + "hashLocal" + "hashIncoming" + "hashIncoming" + "auto:test" + do! + LibDB.Conflicts.record + PT.mainBranchId + locStr + "type" + "hashLocal" + "hashIncoming" + "hashIncoming" + "auto:test" + let! all = LibDB.Conflicts.list () + let atLoc = + all |> List.filter (fun (c : LibDB.Conflicts.Conflict) -> c.location = locStr) + Expect.equal + (List.length atLoc) + 2 + "both the fn-kind and type-kind conflicts are recorded (not collapsed to one id)" + teardown [ a ] + } + + let durableReleaseMigratesInPlace = testTask "a durable Release migrates a seeded store IN PLACE, preserving its data (not a clean-break)" { @@ -885,6 +968,8 @@ let tests = resolutionSurvivesIncrementalFold resolutionSurvivesDiscard identicalContentAuthoringConverges + resolutionSurvivesDiscardAfterRebuild + conflictIdDistinguishesItemKind durableReleaseMigratesInPlace branchMergeSyncs concurrentRebasesConverge diff --git a/packages/darklang/cli/sync.dark b/packages/darklang/cli/sync.dark index ed0dc63b08..a2b0eaf47e 100644 --- a/packages/darklang/cli/sync.dark +++ b/packages/darklang/cli/sync.dark @@ -285,10 +285,10 @@ let execute (state: AppState) (args: List) : AppState = // applying ops …". Surface the real message instead of bucketing every // failure as "unreachable" (which hides apply/DB errors behind a network lie). let errors = - Stdlib.List.fold results [] (fun acc r -> + Stdlib.List.filterMap results (fun r -> match r with - | Ok _ -> acc - | Error e -> Stdlib.List.append acc [ e ]) + | Ok _ -> Stdlib.Option.Option.None + | Error e -> Stdlib.Option.Option.Some e) let reached = (Stdlib.List.length ps) - (Stdlib.List.length errors) From 525c4fa60d5e9950cebf7b223255218fa7c5a753 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 21:09:04 -0400 Subject: [PATCH 066/172] tests: fail-fast on build errors; fix SyncE2E presync cursor for committed_seq paging MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit run-backend-tests ran the pre-built Tests/LocalExec binaries directly, so a failed rebuild silently fell back to the last good binary and reported "Success" on stale code (a compile error in a new test hid as a passing run). Build both up-front with set -e so a compile error aborts before any test runs; published mode asserts the artifacts exist instead of rebuilding. SyncE2E: the presync helper seeded each log's cursor from the seed's MAX(rowid), but package_ops now pages by committed_seq (a commit-order stamp; seed ops are NULL, authored ops are 1..N). So a peer's cursor sat at ~10k while authored ops were committed_seq 1,2 — committed_seq > cursor was false and NOTHING package-op transferred, though the commit's branch_op (still rowid-paged) did, so `dark sync` said "Pulled 1 change" while `view` was "Not found". Deterministic, not flaky (only the 3 package-op-convergence scenarios failed). Seed the package_ops cursor from MAX(committed_seq); branch_ops/resolutions stay MAX(rowid). Production was never affected — real peers start at cursor 0. Also make the convergence asserts re-pull until settled (real-process sync is eventually-consistent). 6/6 green, 3 runs. --- backend/tests/Tests/SyncE2E.Tests.fs | 85 ++++++++++++++++++++-------- scripts/run-backend-tests | 25 +++++++- 2 files changed, 82 insertions(+), 28 deletions(-) diff --git a/backend/tests/Tests/SyncE2E.Tests.fs b/backend/tests/Tests/SyncE2E.Tests.fs index 6749c80054..4fc31b16b6 100644 --- a/backend/tests/Tests/SyncE2E.Tests.fs +++ b/backend/tests/Tests/SyncE2E.Tests.fs @@ -172,12 +172,16 @@ let private stop (p : System.Diagnostics.Process) : unit = /// transfer (matches the bash harness; keeps the batch tiny + avoids re-shipping the whole seed). let private presync (inst : Instance) (peerUrl : string) : unit = darkIn inst.dir [ "sync"; "connect"; peerUrl ] |> ignore - let baseline (table : string) = - let v = sqlite (seedDb.Force()) $"SELECT COALESCE(MAX(rowid),0) FROM {table}" + // The seed-baseline cursor per log — "already synced up to the common seed" so only a scenario's authored + // ops transfer. Each log's cursor is in the units that log PAGES by: package_ops now pages by `committed_seq` + // (a commit-order stamp; seed ops are NULL → MAX is 0, so authored ops with committed_seq > 0 still ship, and + // the seed itself — NULL committed_seq — never does), while branch_ops/resolutions still page by `rowid`. + let baseline (table : string) (col : string) = + let v = sqlite (seedDb.Force()) $"SELECT COALESCE(MAX({col}),0) FROM {table}" if v = "" then "0" else v - let pkg = baseline "package_ops" - let br = baseline "branch_ops" - let res = baseline "resolutions" + let pkg = baseline "package_ops" "committed_seq" + let br = baseline "branch_ops" "rowid" + let res = baseline "resolutions" "rowid" sqlite (dbOf inst) $"INSERT OR REPLACE INTO sync_cursors_v1(peer,kind,cursor) VALUES('{peerUrl}','package_ops',{pkg}),('{peerUrl}','branch_ops',{br}),('{peerUrl}','resolutions',{res})" @@ -206,6 +210,39 @@ let private assertRealHash (label : string) (h : string) : unit = (low.Contains "error" || low.Contains "not found" || low.Contains "no such") $"{label}: hash line looks like an error, not a hash: '{h}'" +// Real-process sync is eventually-consistent: a single `dark sync` transfers the ops, but the peer's +// fold + value-eval + blob fetch-on-miss can still be settling when a read fires immediately after (the DIAG +// was "Pulled 1 change" yet `view` → "Not found"). So the convergence assertions RE-PULL and re-check up to a +// deadline instead of asserting once — the logic is proven deterministically by the in-process MultiInstance +// suite; this only absorbs cross-process timing. (A re-`sync` also re-triggers blob fetch-on-miss.) + +/// Re-pull on until hashes to , up to ~8s. Returns whether it converged. +let private pullUntilHash (inst : Instance) (loc : string) (target : string) : bool = + let mutable h = hashOf inst loc + let mutable waited = 0 + while h <> target && waited < 8000 do + System.Threading.Thread.Sleep 300 + darkIn inst.dir [ "sync" ] |> ignore + h <- hashOf inst loc + waited <- waited + 300 + h = target + +/// Re-pull on until `()` contains , up to ~8s. Returns the last output (so a failed +/// assertion still shows a real value). Used for "the conflict was recorded/shown" after a cross-sync. +let private syncUntilShows + (inst : Instance) + (produce : unit -> string) + (needle : string) + : string = + let mutable out = produce () + let mutable waited = 0 + while not (out.Contains needle) && waited < 8000 do + System.Threading.Thread.Sleep 300 + darkIn inst.dir [ "sync" ] |> ignore + out <- produce () + waited <- waited + 300 + out + // ── scenarios ─────────────────────────────────────────────────────────────────────────────────────── let private withRoot (name : string) (body : string -> Task) : Task = task { @@ -244,15 +281,15 @@ let private realTests = presync b $"http://127.0.0.1:{port}" let out = darkIn b.dir [ "sync" ] Expect.stringContains out "Pulled" "B pulled A's change" + let target = hashOf a "SyncTest.Basic.x" + assertRealHash "A's hash" target + Expect.isTrue + (pullUntilHash b "SyncTest.Basic.x" target) + "the hash converged (re-pull until settled)" Expect.equal (viewOf b "SyncTest.Basic.x") (viewOf a "SyncTest.Basic.x") "the value converged" - assertRealHash "A's hash" (hashOf a "SyncTest.Basic.x") - Expect.equal - (hashOf b "SyncTest.Basic.x") - (hashOf a "SyncTest.Basic.x") - "the hash converged (the convergence assertion)" let resync = darkIn b.dir [ "sync" ] Expect.stringContains resync @@ -285,19 +322,17 @@ let private realTests = presync b $"http://127.0.0.1:{pA}" darkIn a.dir [ "sync" ] |> ignore darkIn b.dir [ "sync" ] |> ignore + // A records the conflict when it pulls B's diverging op; re-pull until it shows. Expect.stringContains - (darkIn a.dir [ "conflicts" ]) + (syncUntilShows a (fun () -> darkIn a.dir [ "conflicts" ]) "SyncTest.Race.n") "SyncTest.Race.n" "the divergence was recorded + shown (never silent)" darkIn a.dir [ "conflicts"; "keep-mine"; "SyncTest.Race.n" ] |> ignore - darkIn b.dir [ "sync" ] |> ignore - assertRealHash - "A's post-resolution hash" - (hashOf a "SyncTest.Race.n") - Expect.equal - (hashOf b "SyncTest.Race.n") - (hashOf a "SyncTest.Race.n") + let target = hashOf a "SyncTest.Race.n" + assertRealHash "A's post-resolution hash" target + Expect.isTrue + (pullUntilHash b "SyncTest.Race.n" target) "B adopts A's resolution → both converge on A's pick" finally stop serverA @@ -330,15 +365,15 @@ let private realTests = presync b $"http://127.0.0.1:{pA}" darkIn a.dir [ "sync" ] |> ignore darkIn b.dir [ "sync" ] |> ignore + // A must hold the conflict before it can keep-theirs; re-pull until it does. + syncUntilShows a (fun () -> darkIn a.dir [ "conflicts" ]) "SyncTest.RaceT.n" + |> ignore darkIn a.dir [ "conflicts"; "keep-theirs"; "SyncTest.RaceT.n" ] |> ignore - darkIn b.dir [ "sync" ] |> ignore - assertRealHash - "A's post-keep-theirs hash" - (hashOf a "SyncTest.RaceT.n") - Expect.equal - (hashOf b "SyncTest.RaceT.n") - (hashOf a "SyncTest.RaceT.n") + let target = hashOf a "SyncTest.RaceT.n" + assertRealHash "A's post-keep-theirs hash" target + Expect.isTrue + (pullUntilHash b "SyncTest.RaceT.n" target) "both converge on the kept-theirs pick" Expect.stringContains (viewOf a "SyncTest.RaceT.n") diff --git a/scripts/run-backend-tests b/scripts/run-backend-tests index b819a19bcf..efd62f2612 100755 --- a/scripts/run-backend-tests +++ b/scripts/run-backend-tests @@ -36,12 +36,31 @@ else LOCALEXEC=Build/out/LocalExec/Debug/net10.0/LocalExec fi - -LOGS="${DARK_CONFIG_RUNDIR}/logs" - grey="\033[1;30m" reset="\033[0m" +# Build the binaries this script runs, and ABORT on any compile error, BEFORE we touch the DB / run anything. +# Otherwise run-backend-tests just executes the pre-built ${EXE}/${LOCALEXEC} — so a failed rebuild silently +# falls back to the last good binary and reports "Success" on stale code (a compile error in a new test hid as +# a passing run). `set -euo pipefail` makes a non-zero build abort here. Published mode is built by a separate +# publish step, so there we only assert the artifacts exist rather than rebuild. +if [[ "$PUBLISHED" == "true" ]]; then + for exe in "$EXE" "$LOCALEXEC"; do + if [[ ! -x "backend/$exe" ]]; then + echo "ERROR: published binary missing: backend/$exe — run the publish step first." >&2 + exit 1 + fi + done +else + echo -e "Building backend ${grey}(fail fast on compile errors)${reset}" + ( cd backend \ + && DARK_CONFIG_TELEMETRY_EXPORTER=none dotnet build src/LocalExec/LocalExec.fsproj -c Debug --nologo -v q \ + && DARK_CONFIG_TELEMETRY_EXPORTER=none dotnet build tests/Tests/Tests.fsproj -c Debug --nologo -v q ) +fi + + +LOGS="${DARK_CONFIG_RUNDIR}/logs" + # Delete the database file before running tests. # WAL mode keeps `.db-wal` (uncommitted writes) and `.db-shm` From 6179d64d00ce1476938a20963b9ac57d2305bcc5 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 22:21:05 -0400 Subject: [PATCH 067/172] format: run scripts/formatting/format on the touched test files --- backend/tests/Tests/MultiInstance.Tests.fs | 15 ++++++++++++--- backend/tests/Tests/SyncE2E.Tests.fs | 10 ++++++++-- 2 files changed, 20 insertions(+), 5 deletions(-) diff --git a/backend/tests/Tests/MultiInstance.Tests.fs b/backend/tests/Tests/MultiInstance.Tests.fs index b0ecbba38e..7f0f2ec7fc 100644 --- a/backend/tests/Tests/MultiInstance.Tests.fs +++ b/backend/tests/Tests/MultiInstance.Tests.fs @@ -494,7 +494,10 @@ let resolutionSurvivesDiscard = "2026-07-08T00:00:00.300Z" do! Resolutions.recordAndApply res let! beforeDiscard = liveHash loc - Expect.equal beforeDiscard [ fnA ] "the override took (fnA over the LWW winner fnB)" + Expect.equal + beforeDiscard + [ fnA ] + "the override took (fnA over the LWW winner fnB)" // An UNRELATED WIP op, so discard actually runs (it's a no-op with zero WIP ops). Bind to fnB (not fnA) // so the rename path can't touch the overlay's item_hash. @@ -557,8 +560,14 @@ let identicalContentAuthoringConverges = let! _ = Seed.receiveOps [] [ mid ] let! bFinal = liveHash loc - Expect.equal aFinal bFinal "both instances converge on the same binding for the name" - Expect.equal aFinal [ fnY ] "the later different-hash edit wins on both (reconciled stamp is .100 < .150)" + Expect.equal + aFinal + bFinal + "both instances converge on the same binding for the name" + Expect.equal + aFinal + [ fnY ] + "the later different-hash edit wins on both (reconciled stamp is .100 < .150)" teardown [ a; b ] } diff --git a/backend/tests/Tests/SyncE2E.Tests.fs b/backend/tests/Tests/SyncE2E.Tests.fs index 4fc31b16b6..e94a265c7c 100644 --- a/backend/tests/Tests/SyncE2E.Tests.fs +++ b/backend/tests/Tests/SyncE2E.Tests.fs @@ -324,7 +324,10 @@ let private realTests = darkIn b.dir [ "sync" ] |> ignore // A records the conflict when it pulls B's diverging op; re-pull until it shows. Expect.stringContains - (syncUntilShows a (fun () -> darkIn a.dir [ "conflicts" ]) "SyncTest.Race.n") + (syncUntilShows + a + (fun () -> darkIn a.dir [ "conflicts" ]) + "SyncTest.Race.n") "SyncTest.Race.n" "the divergence was recorded + shown (never silent)" darkIn a.dir [ "conflicts"; "keep-mine"; "SyncTest.Race.n" ] @@ -366,7 +369,10 @@ let private realTests = darkIn a.dir [ "sync" ] |> ignore darkIn b.dir [ "sync" ] |> ignore // A must hold the conflict before it can keep-theirs; re-pull until it does. - syncUntilShows a (fun () -> darkIn a.dir [ "conflicts" ]) "SyncTest.RaceT.n" + syncUntilShows + a + (fun () -> darkIn a.dir [ "conflicts" ]) + "SyncTest.RaceT.n" |> ignore darkIn a.dir [ "conflicts"; "keep-theirs"; "SyncTest.RaceT.n" ] |> ignore From 8ec7121eb42ed71d38cda941d163a935fce0f191 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Tue, 14 Jul 2026 22:28:16 -0400 Subject: [PATCH 068/172] run-backend-tests: revert the eager up-front build MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The build workflow is owned by scripts/build/compile (the watcher): it does the backend build and only invokes run-backend-tests on build success, so the binary is already fresh when tests run. The up-front `dotnet build` I added was redundant there and, worse, raced the watcher's incremental build against the same output — risking corrupt build state. Revert it; let the compile workflow own building. (The stale-binary-reports-success case that motivated it only occurs when running run-backend-tests standalone with no watcher — a lighter, non-building staleness guard can address that later without fighting compile.) --- scripts/run-backend-tests | 25 +++---------------------- 1 file changed, 3 insertions(+), 22 deletions(-) diff --git a/scripts/run-backend-tests b/scripts/run-backend-tests index efd62f2612..b819a19bcf 100755 --- a/scripts/run-backend-tests +++ b/scripts/run-backend-tests @@ -36,31 +36,12 @@ else LOCALEXEC=Build/out/LocalExec/Debug/net10.0/LocalExec fi -grey="\033[1;30m" -reset="\033[0m" - -# Build the binaries this script runs, and ABORT on any compile error, BEFORE we touch the DB / run anything. -# Otherwise run-backend-tests just executes the pre-built ${EXE}/${LOCALEXEC} — so a failed rebuild silently -# falls back to the last good binary and reports "Success" on stale code (a compile error in a new test hid as -# a passing run). `set -euo pipefail` makes a non-zero build abort here. Published mode is built by a separate -# publish step, so there we only assert the artifacts exist rather than rebuild. -if [[ "$PUBLISHED" == "true" ]]; then - for exe in "$EXE" "$LOCALEXEC"; do - if [[ ! -x "backend/$exe" ]]; then - echo "ERROR: published binary missing: backend/$exe — run the publish step first." >&2 - exit 1 - fi - done -else - echo -e "Building backend ${grey}(fail fast on compile errors)${reset}" - ( cd backend \ - && DARK_CONFIG_TELEMETRY_EXPORTER=none dotnet build src/LocalExec/LocalExec.fsproj -c Debug --nologo -v q \ - && DARK_CONFIG_TELEMETRY_EXPORTER=none dotnet build tests/Tests/Tests.fsproj -c Debug --nologo -v q ) -fi - LOGS="${DARK_CONFIG_RUNDIR}/logs" +grey="\033[1;30m" +reset="\033[0m" + # Delete the database file before running tests. # WAL mode keeps `.db-wal` (uncommitted writes) and `.db-shm` From 30423048f3fe5ffa09c97ca1207d5eafa25cc18e Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 10:41:55 -0400 Subject: [PATCH 069/172] conflicts: resolve by (location, item_kind) so one kind's resolution doesn't clear the other (B1) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit A name can hold a fn AND a value at once — two distinct conflicts at one location. `markOverriddenByLocation` cleared every kind at the location, so resolving the fn silently cleared the value's conflict too (coworker-reported). Key the override on item_kind: markOverriddenByLocation -> markOverriddenByLocationAndKind; conflictKeep/ conflictAcknowledge builtins take an itemKind; recordAndApply/reapplyAll pass the resolution's kind. cli/conflicts.dark resolves kind-aware: --kind, and refuses with the list of kinds when a location is ambiguous. Regression test kindAwareResolutionKeepsOtherKind. Full suite green (9,960). --- .../Builtins.Matter/Libs/Conflicts.fs | 30 +++-- backend/src/LibDB/Conflicts.fs | 17 ++- backend/src/LibDB/Resolutions.fs | 6 +- backend/tests/Tests/MultiInstance.Tests.fs | 45 +++++++ packages/darklang/cli/conflicts.dark | 118 ++++++++++++------ 5 files changed, 161 insertions(+), 55 deletions(-) diff --git a/backend/src/Builtins/Builtins.Matter/Libs/Conflicts.fs b/backend/src/Builtins/Builtins.Matter/Libs/Conflicts.fs index 8c2d17e325..68f31c24a6 100644 --- a/backend/src/Builtins/Builtins.Matter/Libs/Conflicts.fs +++ b/backend/src/Builtins/Builtins.Matter/Libs/Conflicts.fs @@ -61,20 +61,26 @@ let fns () : List = [ Param.make "location" TString - "the conflicted location (owner.modules.name)" ] + "the conflicted location (owner.modules.name)" + Param.make + "itemKind" + TString + "the item kind (fn | type | value) — a location can hold more than one" ] returnType = TBool description = - "Acknowledge the auto-resolved conflict at — the auto (last-writer-wins) choice stands. Returns whether one was found." + "Acknowledge the auto-resolved conflict at of — the auto (last-writer-wins) choice stands. Returns whether one was found." fn = (function - | _, _, _, [ DString location ] -> + | _, _, _, [ DString location; DString itemKind ] -> uply { let! conflicts = LibDB.Conflicts.list () match conflicts |> List.tryFind (fun c -> - c.location = location && c.status = "auto-resolved") + c.location = location + && c.itemKind = itemKind + && c.status = "auto-resolved") with | Some c -> do! LibDB.Conflicts.acknowledge c.id @@ -94,31 +100,37 @@ let fns () : List = "location" TString "the conflicted location (owner.modules.name)" + Param.make + "itemKind" + TString + "the item kind (fn | type | value) — a location can hold more than one" Param.make "chosenHash" TString "the candidate content hash to keep (local or incoming)" ] returnType = TBool description = - "Override the auto-resolution at : bind it to by minting a SYNCED Resolution (applied locally now; converges on peers). Marks the conflict overridden. Returns whether one was found." + "Override the auto-resolution at of : bind it to by minting a SYNCED Resolution (applied locally now; converges on peers). Marks that conflict overridden. Returns whether one was found." fn = (function - | _, _, _, [ DString location; DString chosenHash ] -> + | _, _, _, [ DString location; DString itemKind; DString chosenHash ] -> uply { let! conflicts = LibDB.Conflicts.list () match conflicts |> List.tryFind (fun c -> - c.location = location && c.status = "auto-resolved") + c.location = location + && c.itemKind = itemKind + && c.status = "auto-resolved") with // A resolution must bind one of the TWO conflicting candidates; refuse an arbitrary hash so a // caller can't mint a synced Resolution to content that was never in contention at this location. | Some c when chosenHash = c.localHash || chosenHash = c.incomingHash -> let loc = LibDB.Conflicts.parseLocation location - let itemKind = PT.ItemKind.fromString c.itemKind + let chosenKind = PT.ItemKind.fromString c.itemKind let chosenRef = - PT.Reference.fromHashAndKind (PT.Hash chosenHash, itemKind) + PT.Reference.fromHashAndKind (PT.Hash chosenHash, chosenKind) // The resolution's `at` competes in the same string-LWW as op origin_ts, so it MUST be minted // by the one canonical stamp source (lock-guarded, monotonic, InvariantCulture) — not a raw // UtcNow, which can tie/regress and formats locale-dependently. diff --git a/backend/src/LibDB/Conflicts.fs b/backend/src/LibDB/Conflicts.fs index dba35b072a..82aa9ccffc 100644 --- a/backend/src/LibDB/Conflicts.fs +++ b/backend/src/LibDB/Conflicts.fs @@ -128,17 +128,22 @@ let markOverridden (id : string) : Task = |> Sql.parameters [ "id", Sql.string id ] |> Sql.executeStatementAsync -/// Mark any auto-resolved conflict at this location overridden. Used when a Resolution is applied (local OR -/// synced-in from a peer): the override converges the effective value, so the divergence is settled — a peer -/// that independently recorded the same conflict must stop listing it as unreviewed. -let markOverriddenByLocation +/// Mark the auto-resolved conflict at this location AND item kind overridden. Used when a Resolution is applied +/// (local OR synced-in from a peer): the override converges the effective value, so the divergence is settled — +/// a peer that independently recorded the same conflict must stop listing it as unreviewed. Keyed by +/// `item_kind` too: a name can hold a fn AND a value at once (two distinct conflicts at one location), so +/// resolving the fn must NOT also clear the value's conflict. +let markOverriddenByLocationAndKind (branchId : System.Guid) (location : string) + (itemKind : string) : Task = Sql.query - "UPDATE sync_conflicts SET status = 'overridden' WHERE branch_id = @branch_id AND location = @location AND status = 'auto-resolved'" + "UPDATE sync_conflicts SET status = 'overridden' WHERE branch_id = @branch_id AND location = @location AND item_kind = @item_kind AND status = 'auto-resolved'" |> Sql.parameters - [ "branch_id", Sql.string (string branchId); "location", Sql.string location ] + [ "branch_id", Sql.string (string branchId) + "location", Sql.string location + "item_kind", Sql.string itemKind ] |> Sql.executeStatementAsync /// The current live binding (item_hash, origin_ts) for a location on a branch, if any. diff --git a/backend/src/LibDB/Resolutions.fs b/backend/src/LibDB/Resolutions.fs index 673808b446..443225cb69 100644 --- a/backend/src/LibDB/Resolutions.fs +++ b/backend/src/LibDB/Resolutions.fs @@ -153,9 +153,10 @@ let recordAndApply (r : Resolution) : Task = // The override settled this location — clear any conflict recorded here (on THIS instance, and on a peer // that received the resolution), so it stops showing as an unreviewed conflict after it's been resolved. do! - Conflicts.markOverriddenByLocation + Conflicts.markOverriddenByLocationAndKind r.branchId (Conflicts.locationString r.location) + (r.choice.kind.toString ()) } /// Replay EVERY stored resolution (ordered by `at`) onto the `locations` projection — the overlay half of @@ -185,9 +186,10 @@ let reapplyAll () : Task = // the live path; a re-fold that goes through reapplyAll must do it too, or the resolved conflict pops back // up as unreviewed in `dark conflicts` after a grow.) do! - Conflicts.markOverriddenByLocation + Conflicts.markOverriddenByLocationAndKind r.branchId (Conflicts.locationString r.location) + (r.choice.kind.toString ()) } diff --git a/backend/tests/Tests/MultiInstance.Tests.fs b/backend/tests/Tests/MultiInstance.Tests.fs index 7f0f2ec7fc..255667008b 100644 --- a/backend/tests/Tests/MultiInstance.Tests.fs +++ b/backend/tests/Tests/MultiInstance.Tests.fs @@ -655,6 +655,50 @@ let conflictIdDistinguishesItemKind = } +let kindAwareResolutionKeepsOtherKind = + testTask + "resolving a conflict at one location+kind leaves the other kind's conflict untouched" { + // B1: a name can hold a fn AND a value at once (two distinct conflicts at one location). + // markOverriddenByLocationAndKind must clear ONLY the named kind — not both. (Was: the location-only + // override cleared every kind, so resolving the fn silently cleared the value's conflict too.) + let! a = seededInstance "kindaware" + activate a + let branch = PT.mainBranchId + let loc = "Test.KindResolve.dup" + do! + LibDB.Conflicts.record + branch + loc + "fn" + "fnLocal" + "fnIncoming" + "fnIncoming" + "auto:test" + do! + LibDB.Conflicts.record + branch + loc + "value" + "valLocal" + "valIncoming" + "valIncoming" + "auto:test" + do! LibDB.Conflicts.markOverriddenByLocationAndKind branch loc "fn" + let! all = LibDB.Conflicts.list () + let statusOf (k : string) = + all + |> List.filter (fun (c : LibDB.Conflicts.Conflict) -> c.location = loc) + |> List.tryFind (fun c -> c.itemKind = k) + |> Option.map (fun c -> c.status) + Expect.equal (statusOf "fn") (Some "overridden") "the fn conflict was overridden" + Expect.equal + (statusOf "value") + (Some "auto-resolved") + "the value conflict is UNTOUCHED — still unreviewed" + teardown [ a ] + } + + let durableReleaseMigratesInPlace = testTask "a durable Release migrates a seeded store IN PLACE, preserving its data (not a clean-break)" { @@ -979,6 +1023,7 @@ let tests = identicalContentAuthoringConverges resolutionSurvivesDiscardAfterRebuild conflictIdDistinguishesItemKind + kindAwareResolutionKeepsOtherKind durableReleaseMigratesInPlace branchMergeSyncs concurrentRebasesConverge diff --git a/packages/darklang/cli/conflicts.dark b/packages/darklang/cli/conflicts.dark index dccfe599ca..048c6030a0 100644 --- a/packages/darklang/cli/conflicts.dark +++ b/packages/darklang/cli/conflicts.dark @@ -28,9 +28,76 @@ let private findOpen let private noneMsg (location: String) : String = $"No open conflict at {location}. See: dark conflicts" -// Override at with — mints a synced Resolution + marks the conflict overridden. -let private keep (location: String) (hash: String) : Bool = - Builtin.conflictKeep location hash +// Override at of with — mints a synced Resolution + marks THAT conflict overridden. +let private keep (location: String) (kind: String) (hash: String) : Bool = + Builtin.conflictKeep location kind hash + +// All unreviewed conflicts at a location (a name can hold a fn AND a value → more than one at one location). +let private openAt (location: String) : List = + Stdlib.List.filter (unreviewed ()) (fun c -> c.location == location) + +// "fn, value" — the kinds still conflicting at a location, for the ambiguity message. +let private kindsAt (cs: List) : String = + cs |> Stdlib.List.map (fun c -> c.itemKind) |> Stdlib.String.join ", " + +// Parse `` or ` --kind ` from a resolution command's args. +let private locKind + (rest: List) + : Stdlib.Option.Option<(String * Stdlib.Option.Option)> = + match rest with + | [ loc ] -> Stdlib.Option.Option.Some((loc, Stdlib.Option.Option.None)) + | [ loc; "--kind"; k ] -> Stdlib.Option.Option.Some((loc, Stdlib.Option.Option.Some k)) + | _ -> Stdlib.Option.Option.None + +// Pick the single conflict to resolve: honor an explicit --kind; else resolve the one if unambiguous, else +// refuse and list the kinds (so resolving a fn conflict can't silently also clear a value conflict at the name). +let private pickConflict + (location: String) + (kindOpt: Stdlib.Option.Option) + : Stdlib.Result.Result = + match openAt location with + | [] -> Stdlib.Result.Result.Error(noneMsg location) + | cs -> + match kindOpt with + | Some k -> + match Stdlib.List.findFirst cs (fun c -> c.itemKind == k) with + | Some c -> Stdlib.Result.Result.Ok c + | None -> + Stdlib.Result.Result.Error + $"No {k} conflict at {location}. Kinds in conflict here: {kindsAt cs}" + | None -> + match cs with + | [ c ] -> Stdlib.Result.Result.Ok c + | many -> + Stdlib.Result.Result.Error + $"{location} has more than one conflict ({kindsAt many}). Disambiguate with --kind ." + + +// Shared resolution flow for keep-mine/keep-theirs/ok: pick the conflict (kind-aware), run on it, report. +let private resolveCmd + (state: AppState) + (rest: List) + (verb: String) + (act: Darklang.Sync.Conflicts.Conflict -> Bool) + (okMsg: Darklang.Sync.Conflicts.Conflict -> String) + : AppState = + match locKind rest with + | Some((location, kindOpt)) -> + let _ = + match pickConflict location kindOpt with + | Ok c -> + if act c then + Stdlib.printLine (Colors.success (okMsg c)) + else + Stdlib.printLine (Colors.error (noneMsg location)) + | Error e -> Stdlib.printLine (Colors.error e) + + state + | None -> + Stdlib.printLine ( + Colors.error $"usage: dark conflicts {verb} [--kind fn|type|value]") + + state // Pretty-print one candidate's actual content (its source), indented, so `show` lets you compare the two // versions by WHAT THEY ARE — not just opaque hashes. pmGet* return the always-present PT definition (pt_def, @@ -179,43 +246,18 @@ let execute (state: AppState) (args: List) : AppState = Stdlib.printLine (Colors.error (noneMsg location)) state - | [ "ok"; location ] -> - if Builtin.conflictAcknowledge location then - Stdlib.printLine (Colors.success $"Acknowledged {location} — the auto choice stands.") - else - Stdlib.printLine (Colors.error (noneMsg location)) - - state - - | [ "keep-mine"; location ] -> - match findOpen location with - | Some c -> - if keep location c.localHash then - Stdlib.printLine ( - Colors.success - $"Kept yours ({short c.localHash}) at {location}. This resolution will sync to your peers.") - else - Stdlib.printLine (Colors.error (noneMsg location)) + | "ok" :: rest -> + resolveCmd state rest "ok" (fun c -> + Builtin.conflictAcknowledge c.location c.itemKind) (fun c -> + $"Acknowledged {c.location} ({c.itemKind}) — the auto choice stands.") - state - | None -> - Stdlib.printLine (Colors.error (noneMsg location)) - state + | "keep-mine" :: rest -> + resolveCmd state rest "keep-mine" (fun c -> keep c.location c.itemKind c.localHash) (fun c -> + $"Kept yours ({short c.localHash}) at {c.location} ({c.itemKind}). This resolution will sync to your peers.") - | [ "keep-theirs"; location ] -> - match findOpen location with - | Some c -> - if keep location c.incomingHash then - Stdlib.printLine ( - Colors.success - $"Kept theirs ({short c.incomingHash}) at {location}. This resolution will sync to your peers.") - else - Stdlib.printLine (Colors.error (noneMsg location)) - - state - | None -> - Stdlib.printLine (Colors.error (noneMsg location)) - state + | "keep-theirs" :: rest -> + resolveCmd state rest "keep-theirs" (fun c -> keep c.location c.itemKind c.incomingHash) (fun c -> + $"Kept theirs ({short c.incomingHash}) at {c.location} ({c.itemKind}). This resolution will sync to your peers.") | _ -> help state From f725d3c2370f4697c22d27700d0fca8a4ffce2b5 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 11:14:24 -0400 Subject: [PATCH 070/172] sync: nudge about unreviewed conflicts on the pull line (U1) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit `dark sync` reported "Pulled N changes" but not that any of those changes were contested — you had to already know to run `dark conflicts`. So last-writer-wins could quietly pick a winner and you'd only find out later. Add a private `conflictNudge` in cli/sync.dark: count the unreviewed (auto-resolved) conflicts and, if any, print a warning line "N conflicts to review — run `dark conflicts`" right after the pull summary. Wired after both pull paths: bare `dark sync` and single-peer `dark sync pull`. LWW stays automatic, but it's never silent — the contested-name count shows at the pull moment. conflictsList is now read from two package sites (the conflicts review UI and this nudge), so add it to Builtin.Tests' multiUseAllowlist alongside the other read surfaces (traces, pm*, dbListAll). Full suite green (9,960). --- backend/tests/Tests/Builtin.Tests.fs | 5 +++++ packages/darklang/cli/sync.dark | 16 ++++++++++++++++ 2 files changed, 21 insertions(+) diff --git a/backend/tests/Tests/Builtin.Tests.fs b/backend/tests/Tests/Builtin.Tests.fs index 85a24c444a..2e7bdcddc7 100644 --- a/backend/tests/Tests/Builtin.Tests.fs +++ b/backend/tests/Tests/Builtin.Tests.fs @@ -169,6 +169,11 @@ let private multiUseAllowlist : Set = // LSP, and CLI-script parsing. "parserParseToWrittenTypes" + // Sync conflict-review surface: the recorded-divergence log, read by the + // `dark conflicts` review UI and by the `dark sync` pull nudge (which + // counts unreviewed conflicts so last-writer-wins is never silent). + "conflictsList" + // Misc. "interpreterStatsReset" ] diff --git a/packages/darklang/cli/sync.dark b/packages/darklang/cli/sync.dark index a2b0eaf47e..60de892743 100644 --- a/packages/darklang/cli/sync.dark +++ b/packages/darklang/cli/sync.dark @@ -11,6 +11,20 @@ let private plural (n: Int) (noun: String) : String = else $"{Stdlib.Int.toString n} {noun}s" +// After a pull, nudge about any unreviewed divergences — so last-writer-wins is never SILENT: you always see +// that a name was contested and can review the winner (`dark conflicts`). +let private conflictNudge () : Unit = + let unreviewed = + Builtin.conflictsList () + |> Stdlib.List.filter (fun c -> c.status == "auto-resolved") + |> Stdlib.List.length + + if unreviewed > 0 then + Stdlib.printLine ( + Colors.warning $" {plural unreviewed "conflict"} to review — run `dark conflicts`") + else + () + // Serve the sync endpoint so peers can pull from you. Blocks until Ctrl+C (foreground); for boot, use // `dark sync daemon start`. Same router `dark serve Darklang.Sync.Server.router` would run — just less // to type, and it prints the address peers actually need. @@ -308,6 +322,7 @@ let execute (state: AppState) (args: List) : AppState = else () + let _ = conflictNudge () state | [ "status" ] -> @@ -390,6 +405,7 @@ let execute (state: AppState) (args: List) : AppState = Colors.success $"Pulled {plural n "change"} from {peer}") | Error e -> Stdlib.printLine (Colors.error e) + let _ = conflictNudge () state | [ "disconnect"; peer ] -> From 7aa8c964ea6172d2044217316344d0d5d621b19c Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 11:28:36 -0400 Subject: [PATCH 071/172] sync: rename the `pull ` subcommand to `from ` (D2) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit `dark sync pull ` reads like `git pull` and sets expectations this isn't (no remote-tracking branch, no merge/rebase — it's a one-off whole-store sync from a single peer). Rename the subcommand to `dark sync from ` ("sync once from a single instance"), and harmonize the two `dark sync` self-descriptions from "pull now" to "sync now". Kept the pull-based-sync *vocabulary* — daemon modes `pull+serve`/`pull-only`, "peers can pull from you", the internal `Darklang.Sync.pull` fn — that's accurate distributed-systems language describing the client-GETs-from-server direction, not the git-command confusion the rename addresses. Updated the SyncE2E offline-peer test to drive `sync from` and the stale HttpClient comment. Full suite green (9,960). --- .../Builtins/Builtins.Http.Client/Libs/HttpClient.fs | 2 +- backend/tests/Tests/SyncE2E.Tests.fs | 4 ++-- packages/darklang/cli/sync.dark | 10 +++++----- 3 files changed, 8 insertions(+), 8 deletions(-) diff --git a/backend/src/Builtins/Builtins.Http.Client/Libs/HttpClient.fs b/backend/src/Builtins/Builtins.Http.Client/Libs/HttpClient.fs index c2f64ccb4e..ef59ae525a 100644 --- a/backend/src/Builtins/Builtins.Http.Client/Libs/HttpClient.fs +++ b/backend/src/Builtins/Builtins.Http.Client/Libs/HttpClient.fs @@ -819,7 +819,7 @@ let fns (config : Configuration) : List = // GET with SSRF guards OFF, returning raw BYTES — for pulling a peer's op wire over the tailnet. // (The safe `httpClientRequest` bans loopback/RFC-1918/tailnet, which a peer's sync server sits behind; // the Blob variant hands the body back as bytes for the caller to decode — `Stdlib.Blob.toString` for the - // JSON wire.) TRUSTED-CLI use: the caller IS the code author; used by `Sync.pull` / `dark sync pull `. + // JSON wire.) TRUSTED-CLI use: the caller IS the code author; used by `Sync.pull` / `dark sync from `. // TODO(sync-ssrf): this is registered in the general builtin set, so it's reachable from any CLI-run Dark // (incl. packages pulled from a peer). Gate it to the sync surface (its own library or a sync capability). { name = fn "httpGetUnsafeBytes" 0 diff --git a/backend/tests/Tests/SyncE2E.Tests.fs b/backend/tests/Tests/SyncE2E.Tests.fs index e94a265c7c..f1dd168244 100644 --- a/backend/tests/Tests/SyncE2E.Tests.fs +++ b/backend/tests/Tests/SyncE2E.Tests.fs @@ -429,12 +429,12 @@ let private realTests = task { let b = mk root "B" darkIn b.dir [ "login"; "Stachu" ] |> ignore - // No server on this port — the peer is "down". `sync pull ` (single peer) surfaces the + // No server on this port — the peer is "down". `sync from ` (single peer) surfaces the // error, unlike bare `sync` which pulls-all and stays quiet about offline peers. let deadPort = 9339 let deadUrl = $"http://127.0.0.1:{deadPort}" presync b deadUrl - let out = (darkIn b.dir [ "sync"; "pull"; deadUrl ]).ToLower() + let out = (darkIn b.dir [ "sync"; "from"; deadUrl ]).ToLower() Expect.isFalse (out.Contains "pulled") "it must not claim to have pulled anything from a peer that isn't there" diff --git a/packages/darklang/cli/sync.dark b/packages/darklang/cli/sync.dark index 60de892743..4c9cb713de 100644 --- a/packages/darklang/cli/sync.dark +++ b/packages/darklang/cli/sync.dark @@ -251,12 +251,12 @@ let help (state: AppState) : AppState = [ "dark sync — keep your packages in step with your other instances, over HTTP." "Local-first: sync is opt-in, and once you connect a peer it stays current." "" - " dark sync pull now from every instance you're connected to" + " dark sync sync now from every instance you're connected to" " dark sync connect start syncing with an instance (e.g. http://feriel.tailnet:9000)" " dark sync disconnect stop syncing with an instance" " dark sync serve let peers pull from you (add --port N; default 9000)" " dark sync status who you're syncing with, and how current each is" - " dark sync pull pull once from a single instance" + " dark sync from sync once from a single instance" "" "All your branches sync wholesale — a branch is the same on every instance you connect." "" @@ -385,7 +385,7 @@ let execute (state: AppState) (args: List) : AppState = Stdlib.printLine ( Colors.success $"Now syncing with {peer} — reachable ({Stdlib.Int64.toString n} ops)") Stdlib.printLine ( - Colors.hint " dark sync pull now · dark sync daemon start keep current on boot") + Colors.hint " dark sync sync now · dark sync daemon start keep current on boot") | Error _ -> Stdlib.printLine (Colors.success $"Added {peer}") Stdlib.printLine ( @@ -395,7 +395,7 @@ let execute (state: AppState) (args: List) : AppState = state - | [ "pull"; peer ] -> + | [ "from"; peer ] -> match Darklang.Sync.pull peer with | Ok n -> if n == 0 then @@ -444,6 +444,6 @@ let complete : List = match args with | [] -> - [ "status"; "connect"; "disconnect"; "serve"; "pull"; "daemon" ] + [ "status"; "connect"; "disconnect"; "serve"; "from"; "daemon" ] |> Stdlib.List.map Completion.simple | _ -> [] From 3621952d76c15665f66a285eef5bf2f17f1c97dc Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 11:44:35 -0400 Subject: [PATCH 072/172] rebase: `--status` distinguishes "up to date" from "behind but clean" (U4) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit `rebase --status` only ran `getConflicts`, which is empty BOTH when the branch is up to date AND when it's behind-but-clean (parent advanced, nothing overlaps). So it printed one ambiguous line — "No rebase needed, or no conflicts" — that couldn't tell those apart. Add a read-only `needsRebase` (LibDB.Rebase) — is the branch's base behind the parent's latest? — exposed as the `scmRebaseNeeded` builtin and `SCM.Rebase.needed`. The CLI now reports three honest states: up to date; behind-but-clean (run `rebase`); or behind-with-conflicts (listed). Also extracted the parent's-latest-commit query into `parentLatestCommit`, shared by `rebase` and `needsRebase` (removes a duplicated query). Full suite green (9,960). --- .../Builtins.Matter/Libs/PM/Rebase.fs | 20 +++++++++ backend/src/LibDB/Rebase.fs | 43 ++++++++++++++----- packages/darklang/cli/scm/rebase.dark | 11 ++++- packages/darklang/scm/rebase.dark | 6 +++ 4 files changed, 68 insertions(+), 12 deletions(-) diff --git a/backend/src/Builtins/Builtins.Matter/Libs/PM/Rebase.fs b/backend/src/Builtins/Builtins.Matter/Libs/PM/Rebase.fs index 355e97ec01..70cf74fa57 100644 --- a/backend/src/Builtins/Builtins.Matter/Libs/PM/Rebase.fs +++ b/backend/src/Builtins/Builtins.Matter/Libs/PM/Rebase.fs @@ -45,6 +45,26 @@ let fns () : List = deprecated = NotDeprecated } + { name = fn "scmRebaseNeeded" 0 + typeParams = [] + parameters = [ Param.make "branchId" TUuid "Branch to check" ] + returnType = TBool + description = + "Whether the branch is behind its parent — i.e. a rebase would move it. Distinct from having conflicts: a branch can need a (clean) rebase with no conflicts." + fn = + function + | _, _, _, [ DUuid branchId ] -> + uply { + let! needed = LibDB.Rebase.needsRebase branchId + return DBool needed + } + | _ -> incorrectArgs () + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + { name = fn "scmGetRebaseConflicts" 0 typeParams = [] parameters = [ Param.make "branchId" TUuid "Branch to check" ] diff --git a/backend/src/LibDB/Rebase.fs b/backend/src/LibDB/Rebase.fs index ab581bbd51..385f39274c 100644 --- a/backend/src/LibDB/Rebase.fs +++ b/backend/src/LibDB/Rebase.fs @@ -97,6 +97,38 @@ let getConflicts (branchId : PT.BranchId) : Task> = } +/// The parent branch's latest commit hash (None if the parent has no commits yet). +let private parentLatestCommit (parentId : PT.BranchId) : Task> = + Sql.query + """ + SELECT hash FROM commits + WHERE branch_id = @parent_id + ORDER BY created_at DESC + LIMIT 1 + """ + |> Sql.parameters [ "parent_id", Sql.uuid parentId ] + |> Sql.executeRowOptionAsync (fun read -> Hash(read.string "hash")) + + +/// Is the branch behind its parent — would a rebase actually move its base? Read-only. +/// +/// Distinct from `getConflicts`, which is empty BOTH when the branch is up to date AND when it's +/// behind-but-clean (parent advanced, no overlapping edits). So `rebase --status` needs this to tell +/// "nothing to do" apart from "a clean rebase is waiting." +let needsRebase (branchId : PT.BranchId) : Task = + task { + let! branchOpt = Branches.get branchId + match branchOpt with + | None -> return false + | Some branch -> + match branch.parentBranchId with + | None -> return false // main branch: nothing to rebase onto + | Some parentId -> + let! parentLatest = parentLatestCommit parentId + return branch.baseCommitHash <> parentLatest + } + + /// Perform rebase: verify no conflicts, update base_commit_hash to parent's latest. /// /// TODO (multi-tenant): same TOCTOU shape as Merge.merge — reads @@ -112,16 +144,7 @@ let rebase (branchId : PT.BranchId) : Task>> | None -> return Ok "Main branch, nothing to rebase" | Some parentId -> // Get parent's latest commit - let! parentLatest = - Sql.query - """ - SELECT hash FROM commits - WHERE branch_id = @parent_id - ORDER BY created_at DESC - LIMIT 1 - """ - |> Sql.parameters [ "parent_id", Sql.uuid parentId ] - |> Sql.executeRowOptionAsync (fun read -> Hash(read.string "hash")) + let! parentLatest = parentLatestCommit parentId if branch.baseCommitHash = parentLatest then return Ok "Already up to date" diff --git a/packages/darklang/cli/scm/rebase.dark b/packages/darklang/cli/scm/rebase.dark index fbe87ee358..fcae403aab 100644 --- a/packages/darklang/cli/scm/rebase.dark +++ b/packages/darklang/cli/scm/rebase.dark @@ -8,10 +8,17 @@ let execute (state: AppState) (args: List) : AppState = if showStatus then let conflicts = SCM.Rebase.getConflicts state.currentBranchId + // Conflicts can only exist when the parent has advanced past your base, so a non-empty list already + // means a rebase is needed. When it's empty, `needed` splits the two cases the old wording ran + // together: genuinely up to date vs. behind-but-clean (parent moved, nothing overlaps). if Stdlib.List.isEmpty conflicts then - Stdlib.printLine (Colors.success "No rebase needed, or no conflicts.") + if SCM.Rebase.needed state.currentBranchId then + Stdlib.printLine (Colors.warning "Rebase needed — your branch is behind its parent.") + Stdlib.printLine (Colors.hint " No conflicts. Run `rebase` to catch up.") + else + Stdlib.printLine (Colors.success "Up to date with parent — no rebase needed.") else - Stdlib.printLine (Colors.warning "Rebase conflicts:") + Stdlib.printLine (Colors.warning "Rebase needed, but these locations conflict:") conflicts |> Stdlib.List.iter (fun c -> Stdlib.printLine $" {c}") [ ""; "Fix these on your branch, then run 'rebase' again." ] |> Stdlib.printLines diff --git a/packages/darklang/scm/rebase.dark b/packages/darklang/scm/rebase.dark index 0770b8a10f..92432c1c60 100644 --- a/packages/darklang/scm/rebase.dark +++ b/packages/darklang/scm/rebase.dark @@ -9,3 +9,9 @@ let rebase (branchId: Uuid) : Stdlib.Result.Result> = /// Get list of conflicting location paths for rebase let getConflicts (branchId: Uuid) : List = Builtin.scmGetRebaseConflicts branchId + + +/// Whether the branch is behind its parent (a rebase would move it). Distinct from having +/// conflicts — a branch can need a clean rebase with none. +let needed (branchId: Uuid) : Bool = + Builtin.scmRebaseNeeded branchId From 02293563f8e6987d5f1b2cb13083a4443434a312 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 12:16:04 -0400 Subject: [PATCH 073/172] rebase: content-aware conflict detection, so a branch can't get permanently stuck (B2) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The rebase-conflict check was PATH-based: a location counted as conflicting if it was modified-since-base on both the branch and its parent. Re-editing a location keeps it "modified", so the conflict could NEVER be cleared by editing — yet the error said "fix these on your branch, then run rebase again". That advice was impossible to satisfy; the only escape was archiving the branch (coworker-reported unrecoverable state). Make getConflicts CONTENT-AWARE: compare the branch's and parent's live binding hashes and only flag locations that genuinely DIFFER. Identical edits on both sides stop registering, and reconciling a real conflict to match the parent now makes the hashes equal → it clears → rebase proceeds. The rebase / --status / help text now name the real remedy (reconcile to the parent's version, or archive) instead of the impossible one. Regression test testRebaseConflictsAreContentAware: a two-branch setup where one location is bound to DIFFERENT content on each side (a conflict) and another to IDENTICAL content (not). This is the in-PR deadlock fix. The full keep-mine/keep-parent resolution flow — which has resolution semantics genuinely distinct from sync conflicts (branch-local one-time vs synced-global) — is written up as a design proposal for its own PR. Full suite green (9,961). --- backend/src/LibDB/Rebase.fs | 42 +++++++++++++++-- backend/tests/Tests/BranchOps.Tests.fs | 64 +++++++++++++++++++++++++- packages/darklang/cli/scm/rebase.dark | 15 ++++-- 3 files changed, 112 insertions(+), 9 deletions(-) diff --git a/backend/src/LibDB/Rebase.fs b/backend/src/LibDB/Rebase.fs index 385f39274c..ad41e6627c 100644 --- a/backend/src/LibDB/Rebase.fs +++ b/backend/src/LibDB/Rebase.fs @@ -64,7 +64,35 @@ let private getLocationPathsModifiedSince } -/// Check for rebase conflicts without performing rebase +/// The branch's current live binding hash for a location, if any. +let private currentHash + (branchId : PT.BranchId) + (c : RebaseConflict) + : Task> = + Sql.query + """ + SELECT item_hash FROM locations + WHERE owner = @owner AND modules = @modules AND name = @name AND item_type = @item_type + AND branch_id = @branch_id AND unlisted_at IS NULL + LIMIT 1 + """ + |> Sql.parameters + [ "owner", Sql.string c.owner + "modules", Sql.string c.modules + "name", Sql.string c.name + "item_type", Sql.string c.itemType + "branch_id", Sql.uuid branchId ] + |> Sql.executeRowOptionAsync (fun read -> read.string "item_hash") + + +/// Check for rebase conflicts without performing rebase. +/// +/// CONTENT-AWARE: a conflict is a location modified on both sides since the base whose branch and parent +/// bindings actually DIFFER. The "modified on both" gate alone is content-blind — it fires even when both +/// sides converged to identical content, and (worse) it can NEVER be cleared by editing, since re-editing a +/// location keeps it "modified": a permanent deadlock, with an error that told you to do the impossible. +/// Comparing the live hashes fixes both: identical edits aren't a conflict, and reconciling a genuine one to +/// match the parent makes the hashes equal → it clears → `rebase` proceeds. let getConflicts (branchId : PT.BranchId) : Task> = task { let! branchOpt = Branches.get branchId @@ -82,18 +110,24 @@ let getConflicts (branchId : PT.BranchId) : Task> = let! branchLocs = branchLocations let! parentLocs = parentLocations - // Conflict = same (owner, modules, name, itemType) modified on both sides + // Candidate = same (owner, modules, name, itemType) modified on both sides. let branchSet = branchLocs |> List.map (fun l -> (l.owner, l.modules, l.name, l.itemType)) |> Set.ofList - let conflicts = + let candidates = parentLocs |> List.filter (fun l -> Set.contains (l.owner, l.modules, l.name, l.itemType) branchSet) - return conflicts + // Keep only candidates whose branch and parent bindings genuinely differ. + let mutable conflicts = [] + for l in candidates do + let! branchHash = currentHash branchId l + let! parentHash = currentHash parentId l + if branchHash <> parentHash then conflicts <- l :: conflicts + return List.rev conflicts } diff --git a/backend/tests/Tests/BranchOps.Tests.fs b/backend/tests/Tests/BranchOps.Tests.fs index 801ece198b..dffc2864aa 100644 --- a/backend/tests/Tests/BranchOps.Tests.fs +++ b/backend/tests/Tests/BranchOps.Tests.fs @@ -13,6 +13,7 @@ module PT = LibExecution.ProgramTypes module Branches = LibDB.Branches module Inserts = LibDB.Inserts module BranchOpPlayback = LibDB.BranchOpPlayback +module Rebase = LibDB.Rebase open Fumble open LibDB.Sqlite @@ -387,6 +388,66 @@ let testPartialCommitDeprecationState = } +/// Content-aware rebase conflicts: a location changed on both a branch and its parent is a conflict only +/// when the two versions actually DIFFER. Identical edits on both sides aren't a conflict — and the +/// path-only check that predated this could never be cleared by editing (re-editing keeps the path +/// "modified"), a permanent deadlock behind an impossible "fix it, then rebase" instruction. +let testRebaseConflictsAreContentAware = + testTask + "rebase conflicts: only DIVERGENT both-sides edits are conflicts, not identical ones" { + // Parent P (off main) with one commit, so a child branch gets a real base. + let! (parent : PT.Branch) = Branches.create "rebase-ca-parent" PT.mainBranchId + let seedFn = makeFn (eInt64 0L) + let! (_ : int64) = + Inserts.insertAndApplyOpsAsWip + parent.id + [ PT.PackageOp.AddFn seedFn + PT.PackageOp.SetName(loc "caSeed", PT.PackageFn seedFn.hash) ] + let! (_ : Result) = + Inserts.commitWipOps LibCloud.Account.IDs.darklang parent.id "seed" + + // Child B off P — base = P's seed commit. + let! (child : PT.Branch) = Branches.create "rebase-ca-child" parent.id + + // One fn identical on both sides (same body → same content hash); two DIFFERENT fns for the divergent one. + let converged = makeFn (eInt64 7L) + let childDiverge = makeFn (eInt64 1L) + let parentDiverge = makeFn (eInt64 2L) + + // B edits both locations (after base). + let! (_ : int64) = + Inserts.insertAndApplyOpsAsWip + child.id + [ PT.PackageOp.AddFn childDiverge + PT.PackageOp.SetName(loc "caDiverge", PT.PackageFn childDiverge.hash) + PT.PackageOp.AddFn converged + PT.PackageOp.SetName(loc "caConverge", PT.PackageFn converged.hash) ] + let! (_ : Result) = + Inserts.commitWipOps LibCloud.Account.IDs.darklang child.id "child edits" + + // P edits the SAME two locations after B forked: caDiverge to a DIFFERENT fn, caConverge to the identical one. + let! (_ : int64) = + Inserts.insertAndApplyOpsAsWip + parent.id + [ PT.PackageOp.AddFn parentDiverge + PT.PackageOp.SetName(loc "caDiverge", PT.PackageFn parentDiverge.hash) + PT.PackageOp.AddFn converged + PT.PackageOp.SetName(loc "caConverge", PT.PackageFn converged.hash) ] + let! (_ : Result) = + Inserts.commitWipOps LibCloud.Account.IDs.darklang parent.id "parent edits" + + let! conflicts = Rebase.getConflicts child.id + let names = + conflicts |> List.map (fun (c : Rebase.RebaseConflict) -> c.name) |> Set.ofList + Expect.isTrue + (Set.contains "caDiverge" names) + "a location bound to DIFFERENT content on each side is a conflict" + Expect.isFalse + (Set.contains "caConverge" names) + "a location bound to IDENTICAL content on each side is NOT a conflict (content-aware)" + } + + let tests = testList "BranchOps" @@ -396,4 +457,5 @@ let tests = testGhostFunctionCrossBranch testPartialCommit testPartialCommitSameFqn - testPartialCommitDeprecationState ] + testPartialCommitDeprecationState + testRebaseConflictsAreContentAware ] diff --git a/packages/darklang/cli/scm/rebase.dark b/packages/darklang/cli/scm/rebase.dark index fcae403aab..ce6d9b2520 100644 --- a/packages/darklang/cli/scm/rebase.dark +++ b/packages/darklang/cli/scm/rebase.dark @@ -20,7 +20,9 @@ let execute (state: AppState) (args: List) : AppState = else Stdlib.printLine (Colors.warning "Rebase needed, but these locations conflict:") conflicts |> Stdlib.List.iter (fun c -> Stdlib.printLine $" {c}") - [ ""; "Fix these on your branch, then run 'rebase' again." ] + [ "" + "Reconcile each on your branch so it matches the parent's version, then run `rebase`." + "(Or `dark branch archive ` to abandon this branch.)" ] |> Stdlib.printLines state @@ -30,9 +32,13 @@ let execute (state: AppState) (args: List) : AppState = Stdlib.printLine (Colors.success msg) state | Error conflicts -> - Stdlib.printLine (Colors.error "Rebase failed - conflicts found:") + Stdlib.printLine ( + Colors.error + "Rebase blocked — these locations changed on both your branch and its parent:") conflicts |> Stdlib.List.iter (fun c -> Stdlib.printLine $" {c}") - [ ""; "Fix these on your branch, then run 'rebase' again." ] + [ "" + "Reconcile each on your branch so it matches the parent's version, then run `rebase` again." + "(Or `dark branch archive ` to abandon this branch.)" ] |> Stdlib.printLines state @@ -48,7 +54,8 @@ let help (state: AppState) : AppState = "Flags:" " --status, -s Show if rebase is needed and list conflicts" "" - "If conflicts are found, fix your branch's definitions and retry." ] + "If conflicts are found, reconcile each on your branch to match the parent's version, then" + "retry (or archive the branch to abandon it)." ] |> Stdlib.printLines state From bb446850d14d78987af0be492042bc4b0b28e73b Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 16:14:16 -0400 Subject: [PATCH 074/172] compiler: airlift DarkCompiler into backend/src/LibCompiler (vendored, build-gated) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Vendor the native ahead-of-time compiler engine as an opt-in "compiler extension" (plan §3.5). ~51.4K LOC F#, pure-functional, 8-pass, direct ELF/Mach-O emission. Dropped the standalone Program.fs (CLI Main) — the entry point is CompilerLibrary. LibCompiler.fsproj builds it as a Library and opts out of the backend's --warnaserror/--warnon posture (vendored code builds under default F# warnings, as it does upstream). Builds clean: 0 warnings, 0 errors. Kept the bundled .dark stdlib for bring-up sanity; it retires once the PT->AST bridge consumes this repo's package tree (plan §11 Q8). Source: ~/code/compiler @ x64 76c67e8 ("Tests: disable memReclaimBurn on x86_64"). Clean drop — provenance by reference, no foreign git history. --- backend/src/LibCompiler/ANF.fs | 277 + backend/src/LibCompiler/ARM64.fs | 172 + backend/src/LibCompiler/ARM64Symbolic.fs | 285 + backend/src/LibCompiler/AST.fs | 235 + backend/src/LibCompiler/ASTPrettyPrinter.fs | 861 ++ backend/src/LibCompiler/Binary.fs | 193 + backend/src/LibCompiler/Binary_ELF.fs | 90 + backend/src/LibCompiler/Bitset.fs | 162 + backend/src/LibCompiler/CompilerLibrary.fs | 1882 ++++ backend/src/LibCompiler/Crash.fs | 18 + backend/src/LibCompiler/IRPrinter.fs | 693 ++ backend/src/LibCompiler/LIR.fs | 206 + backend/src/LibCompiler/LibCompiler.fsproj | 110 + backend/src/LibCompiler/LiteralPool.fs | 59 + backend/src/LibCompiler/MIR.fs | 205 + backend/src/LibCompiler/Output.fs | 22 + backend/src/LibCompiler/ParallelMoves.fs | 138 + backend/src/LibCompiler/Platform.fs | 113 + backend/src/LibCompiler/ResultList.fs | 16 + backend/src/LibCompiler/Runtime.fs | 2907 ++++++ backend/src/LibCompiler/Stdlib.fs | 230 + backend/src/LibCompiler/X86_64.fs | 134 + .../LibCompiler/passes/1.5_TypeChecking.fs | 4808 +++++++++ .../LibCompiler/passes/1_InterpreterParser.fs | 2763 ++++++ backend/src/LibCompiler/passes/1_Parser.fs | 2368 +++++ .../LibCompiler/passes/2.3_ANF_Optimize.fs | 531 + .../LibCompiler/passes/2.4_ANF_Inlining.fs | 460 + .../passes/2.5_RefCountInsertion.fs | 1012 ++ .../LibCompiler/passes/2.6_PrintInsertion.fs | 114 + .../passes/2.7_TailCallDetection.fs | 217 + .../src/LibCompiler/passes/2_AST_to_ANF.fs | 8804 +++++++++++++++++ .../passes/3.1_SSA_Construction.fs | 999 ++ .../LibCompiler/passes/3.5_MIR_Optimize.fs | 1274 +++ .../src/LibCompiler/passes/3_ANF_to_MIR.fs | 2191 ++++ .../LibCompiler/passes/4.5_LIR_Peephole.fs | 651 ++ .../src/LibCompiler/passes/4_MIR_to_LIR.fs | 1722 ++++ .../passes/5.5_FunctionTreeShaking.fs | 46 + .../passes/5_RegisterAllocation.fs | 3791 +++++++ .../passes/ANFDeadCodeElimination.fs | 123 + .../LibCompiler/passes/DeadCodeElimination.fs | 95 + .../src/LibCompiler/passes/arm64/6_CodeGen.fs | 3806 +++++++ .../src/LibCompiler/passes/arm64/7_Emit.fs | 33 + .../LibCompiler/passes/arm64/7_Encoding.fs | 1569 +++ .../src/LibCompiler/passes/arm64/7_Resolve.fs | 192 + .../passes/arm64/8_Binary_Generation_ELF.fs | 365 + .../passes/arm64/8_Binary_Generation_MachO.fs | 627 ++ .../src/LibCompiler/passes/x64/6_CodeGen.fs | 3066 ++++++ .../src/LibCompiler/passes/x64/7_Encoding.fs | 646 ++ .../src/LibCompiler/passes/x64/7_Resolve.fs | 132 + .../passes/x64/8_Binary_Generation_ELF.fs | 108 + backend/src/LibCompiler/stdlib/AWS.dark | 113 + backend/src/LibCompiler/stdlib/Base64.dark | 180 + backend/src/LibCompiler/stdlib/Bool.dark | 16 + backend/src/LibCompiler/stdlib/Builtin.dark | 11 + backend/src/LibCompiler/stdlib/Bytes.dark | 107 + backend/src/LibCompiler/stdlib/Char.dark | 100 + backend/src/LibCompiler/stdlib/Crypto.dark | 1391 +++ backend/src/LibCompiler/stdlib/Date.dark | 280 + backend/src/LibCompiler/stdlib/Dict.dark | 90 + backend/src/LibCompiler/stdlib/Float.dark | 226 + backend/src/LibCompiler/stdlib/Int16.dark | 100 + backend/src/LibCompiler/stdlib/Int32.dark | 101 + backend/src/LibCompiler/stdlib/Int64.dark | 105 + backend/src/LibCompiler/stdlib/Int8.dark | 98 + backend/src/LibCompiler/stdlib/List.dark | 322 + backend/src/LibCompiler/stdlib/Math.dark | 52 + backend/src/LibCompiler/stdlib/Option.dark | 43 + backend/src/LibCompiler/stdlib/Path.dark | 14 + backend/src/LibCompiler/stdlib/Platform.dark | 12 + backend/src/LibCompiler/stdlib/Result.dark | 43 + backend/src/LibCompiler/stdlib/String.dark | 542 + backend/src/LibCompiler/stdlib/Tuple2.dark | 23 + backend/src/LibCompiler/stdlib/Tuple3.dark | 26 + backend/src/LibCompiler/stdlib/UInt16.dark | 99 + backend/src/LibCompiler/stdlib/UInt32.dark | 100 + backend/src/LibCompiler/stdlib/UInt64.dark | 98 + backend/src/LibCompiler/stdlib/UInt8.dark | 97 + backend/src/LibCompiler/stdlib/Uuid.dark | 61 + .../src/LibCompiler/stdlib/__FingerTree.dark | 1400 +++ backend/src/LibCompiler/stdlib/__HAMT.dark | 741 ++ backend/src/LibCompiler/stdlib/__Hash.dark | 37 + backend/src/LibCompiler/unicode_data.dark | 20 + 82 files changed, 58169 insertions(+) create mode 100644 backend/src/LibCompiler/ANF.fs create mode 100644 backend/src/LibCompiler/ARM64.fs create mode 100644 backend/src/LibCompiler/ARM64Symbolic.fs create mode 100644 backend/src/LibCompiler/AST.fs create mode 100644 backend/src/LibCompiler/ASTPrettyPrinter.fs create mode 100644 backend/src/LibCompiler/Binary.fs create mode 100644 backend/src/LibCompiler/Binary_ELF.fs create mode 100644 backend/src/LibCompiler/Bitset.fs create mode 100644 backend/src/LibCompiler/CompilerLibrary.fs create mode 100644 backend/src/LibCompiler/Crash.fs create mode 100644 backend/src/LibCompiler/IRPrinter.fs create mode 100644 backend/src/LibCompiler/LIR.fs create mode 100644 backend/src/LibCompiler/LibCompiler.fsproj create mode 100644 backend/src/LibCompiler/LiteralPool.fs create mode 100644 backend/src/LibCompiler/MIR.fs create mode 100644 backend/src/LibCompiler/Output.fs create mode 100644 backend/src/LibCompiler/ParallelMoves.fs create mode 100644 backend/src/LibCompiler/Platform.fs create mode 100644 backend/src/LibCompiler/ResultList.fs create mode 100644 backend/src/LibCompiler/Runtime.fs create mode 100644 backend/src/LibCompiler/Stdlib.fs create mode 100644 backend/src/LibCompiler/X86_64.fs create mode 100644 backend/src/LibCompiler/passes/1.5_TypeChecking.fs create mode 100644 backend/src/LibCompiler/passes/1_InterpreterParser.fs create mode 100644 backend/src/LibCompiler/passes/1_Parser.fs create mode 100644 backend/src/LibCompiler/passes/2.3_ANF_Optimize.fs create mode 100644 backend/src/LibCompiler/passes/2.4_ANF_Inlining.fs create mode 100644 backend/src/LibCompiler/passes/2.5_RefCountInsertion.fs create mode 100644 backend/src/LibCompiler/passes/2.6_PrintInsertion.fs create mode 100644 backend/src/LibCompiler/passes/2.7_TailCallDetection.fs create mode 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backend/src/LibCompiler/stdlib/Float.dark create mode 100644 backend/src/LibCompiler/stdlib/Int16.dark create mode 100644 backend/src/LibCompiler/stdlib/Int32.dark create mode 100644 backend/src/LibCompiler/stdlib/Int64.dark create mode 100644 backend/src/LibCompiler/stdlib/Int8.dark create mode 100644 backend/src/LibCompiler/stdlib/List.dark create mode 100644 backend/src/LibCompiler/stdlib/Math.dark create mode 100644 backend/src/LibCompiler/stdlib/Option.dark create mode 100644 backend/src/LibCompiler/stdlib/Path.dark create mode 100644 backend/src/LibCompiler/stdlib/Platform.dark create mode 100644 backend/src/LibCompiler/stdlib/Result.dark create mode 100644 backend/src/LibCompiler/stdlib/String.dark create mode 100644 backend/src/LibCompiler/stdlib/Tuple2.dark create mode 100644 backend/src/LibCompiler/stdlib/Tuple3.dark create mode 100644 backend/src/LibCompiler/stdlib/UInt16.dark create mode 100644 backend/src/LibCompiler/stdlib/UInt32.dark create mode 100644 backend/src/LibCompiler/stdlib/UInt64.dark create mode 100644 backend/src/LibCompiler/stdlib/UInt8.dark create mode 100644 backend/src/LibCompiler/stdlib/Uuid.dark create mode 100644 backend/src/LibCompiler/stdlib/__FingerTree.dark create mode 100644 backend/src/LibCompiler/stdlib/__HAMT.dark create mode 100644 backend/src/LibCompiler/stdlib/__Hash.dark create mode 100644 backend/src/LibCompiler/unicode_data.dark diff --git a/backend/src/LibCompiler/ANF.fs b/backend/src/LibCompiler/ANF.fs new file mode 100644 index 0000000000..7d52741017 --- /dev/null +++ b/backend/src/LibCompiler/ANF.fs @@ -0,0 +1,277 @@ +// ANF.fs - A-Normal Form Intermediate Representation +// +// Defines the ANF (A-Normal Form) data structures. +// +// ANF is an intermediate representation where: +// - All intermediate computations are named with temporary variables +// - All operands to operations are simple (variables or literals, called "atoms") +// - Evaluation order is completely explicit through let-bindings +// +// This representation simplifies subsequent compiler passes by eliminating +// nested expressions. +// +// Example ANF for "2 + 3 * 4": +// let tmp0 = 3 +// let tmp1 = 4 +// let tmp2 = tmp0 * tmp1 +// let tmp3 = 2 +// let tmp4 = tmp3 + tmp2 +// return tmp4 + +module ANF + +/// Unique identifier for temporary variables +type TempId = TempId of int + +/// Parameter with type information bundled together (makes invalid states unrepresentable) +type TypedParam = { Id: TempId; Type: AST.Type } + +/// Integer value with explicit size - invalid states unrepresentable +/// Following "make invalid states unrepresentable" principle +type SizedInt = + | Int8 of sbyte + | Int16 of int16 + | Int32 of int32 + | Int64 of int64 + | UInt8 of byte + | UInt16 of uint16 + | UInt32 of uint32 + | UInt64 of uint64 + +/// Extract int64 value from SizedInt (for codegen) +/// Note: UInt64 values > Int64.MaxValue will be converted incorrectly +let sizedIntToInt64 (si: SizedInt) : int64 = + match si with + | Int8 n -> int64 n + | Int16 n -> int64 n + | Int32 n -> int64 n + | Int64 n -> n + | UInt8 n -> int64 n + | UInt16 n -> int64 n + | UInt32 n -> int64 n + | UInt64 n -> int64 n // May lose high bit for values > Int64.MaxValue + +/// Get the AST.Type corresponding to a SizedInt +let sizedIntToType (si: SizedInt) : AST.Type = + match si with + | Int8 _ -> AST.TInt8 + | Int16 _ -> AST.TInt16 + | Int32 _ -> AST.TInt32 + | Int64 _ -> AST.TInt64 + | UInt8 _ -> AST.TUInt8 + | UInt16 _ -> AST.TUInt16 + | UInt32 _ -> AST.TUInt32 + | UInt64 _ -> AST.TUInt64 + +/// Atomic expressions (cannot be decomposed further) +type Atom = + | UnitLiteral // Unit value: () + | IntLiteral of SizedInt // Integer with explicit size + | BoolLiteral of bool + | StringLiteral of string + | FloatLiteral of float + | Var of TempId + | FuncRef of string // Reference to a function by name (for higher-order functions) + +/// Binary operations on atoms +type BinOp = + // Arithmetic + | Add + | Sub + | Mul + | Div + | Mod + // Bitwise + | Shl // << (left shift) + | Shr // >> (right shift) + | BitAnd // & (bitwise and) + | BitOr // | (bitwise or) + | BitXor // ^ (bitwise xor) + // Comparisons + | Eq + | Neq + | Lt + | Gt + | Lte + | Gte + // Boolean + | And + | Or + +/// Unary operations on atoms +type UnaryOp = + | Neg + | Not + | BitNot // Bitwise NOT: ~~~expr + +/// Reference-count operation kind +type RcKind = + | GenericHeap + | TaggedList + +/// Function return ownership convention +type ReturnOwnership = + | OwnedReturn + | BorrowedReturn + +/// Complex expressions (produce values) +type CExpr = + | Atom of Atom + | TypedAtom of Atom * AST.Type // Atom with explicit type (for pattern matching where inferred types would be wrong) + | Prim of BinOp * Atom * Atom + | UnaryPrim of UnaryOp * Atom + | IfValue of cond:Atom * thenValue:Atom * elseValue:Atom // If-expression that produces a value + | Call of funcName:string * args:Atom list // Function call (direct: BL instruction) + | BorrowedCall of funcName:string * args:Atom list // Function call that returns a borrowed/aliased value + | TailCall of funcName:string * args:Atom list // Tail call (direct: B instruction, no return) + | IndirectCall of func:Atom * args:Atom list // Call through function variable (BLR instruction) + | IndirectTailCall of func:Atom * args:Atom list // Tail call through function variable (BR instruction) + | ClosureAlloc of funcName:string * captures:Atom list // Allocate closure: (func_addr, cap1, cap2, ...) + | ClosureCall of closure:Atom * args:Atom list // Call through closure, passing closure as hidden first arg + | ClosureTailCall of closure:Atom * args:Atom list // Tail call through closure (BR instruction) + | TupleAlloc of Atom list // Create tuple: (a, b, c) + | TupleGet of tuple:Atom * index:int // Get tuple element: t.0 + // String operations (heap-allocating) + | StringConcat of left:Atom * right:Atom // Concatenate strings: s1 ++ s2 + // Reference counting operations + | RefCountInc of Atom * payloadSize:int * kind:RcKind // Increment ref count of heap value + | RefCountDec of Atom * payloadSize:int * kind:RcKind // Decrement ref count, free if zero + // Output operations (for main expression result) + | Print of Atom * AST.Type // Print value with type-appropriate formatting + | RuntimeError of message:string // Print runtime error to stderr and exit with code 1 + // File I/O intrinsics (generate syscalls) + | FileReadText of path:Atom // Read file, returns Result + | FileExists of path:Atom // Check if file exists, returns Bool + | FileWriteText of path:Atom * content:Atom // Write file, returns Result + | FileAppendText of path:Atom * content:Atom // Append to file, returns Result + | FileDelete of path:Atom // Delete file, returns Result + | FileSetExecutable of path:Atom // Set executable bit, returns Result + | FileWriteFromPtr of path:Atom * ptr:Atom * length:Atom // Write raw bytes from pointer to file + // Float intrinsics + | FloatSqrt of Atom // Square root: sqrt(x) + | FloatAbs of Atom // Absolute value: |x| + | FloatNeg of Atom // Negate: -x + | Int64ToFloat of Atom // Convert Int64 to Float64 + | FloatToInt64 of Atom // Convert Float64 to Int64 (truncate) + | FloatToBits of Atom // Copy Float64 bits to UInt64 + // Raw memory intrinsics (internal, for HAMT implementation) + | RawAlloc of numBytes:Atom // Allocate raw bytes (no header), returns RawPtr + | RawFree of ptr:Atom // Manually free raw memory + | RawGet of ptr:Atom * byteOffset:Atom * valueType:AST.Type option // Read 8 bytes at offset, valueType for float + | RawGetByte of ptr:Atom * byteOffset:Atom // Read 1 byte at offset, returns Int64 (zero-extended) + | RawSet of ptr:Atom * byteOffset:Atom * value:Atom * valueType:AST.Type option // Write 8 bytes at offset, valueType for float + | RawSetByte of ptr:Atom * byteOffset:Atom * value:Atom // Write 1 byte at offset + // String reference counting (at dynamic offset) + | RefCountIncString of Atom // Increment string ref count + | RefCountDecString of Atom // Decrement string ref count, free if zero + // Random intrinsics + | RandomInt64 // Get 8 random bytes as Int64 + // Date intrinsics + | DateNow // Get current Unix epoch seconds as Int64 + // Float to String conversion + | FloatToString of Atom // Convert Float to heap String + +/// ANF expressions with explicit sequencing +type AExpr = + | Let of TempId * CExpr * AExpr + | Return of Atom + | If of cond:Atom * thenBranch:AExpr * elseBranch:AExpr + +/// ANF function definition +type Function = { + Name: string + TypedParams: TypedParam list // Parameter IDs with their types bundled + ReturnType: AST.Type + ReturnOwnership: ReturnOwnership + Body: AExpr +} + +/// ANF program (functions and main expression) +type Program = Program of functions:Function list * main:AExpr + +/// Fresh variable generator (functional style) +type VarGen = VarGen of int + +/// Generate a fresh temporary variable +let freshVar (VarGen n) : TempId * VarGen = + (TempId n, VarGen (n + 1)) + +/// Initial variable generator +let initialVarGen = VarGen 0 + +/// Type map for tracking TempId -> Type mappings +/// Used by reference counting pass to determine which values are heap-allocated +type TypeMap = Map + +/// Program with type information for reference counting +type TypedProgram = { + Program: Program + TypeMap: TypeMap +} + +/// Check if a type requires reference counting (heap-allocated) +let isHeapType (t: AST.Type) : bool = + match t with + | AST.TTuple _ -> true + | AST.TRecord _ -> true + | AST.TList _ -> true + | AST.TSum _ -> true // Conservative: sum types with payloads are heap-allocated + | AST.TDict _ -> true // Dict root pointer is heap-allocated + | _ -> false + +/// Calculate payload size in bytes for a heap-allocated type +let payloadSize (t: AST.Type) (typeReg: Map) : int = + match t with + | AST.TTuple ts -> List.length ts * 8 + | AST.TRecord (name, _) -> + match Map.tryFind name typeReg with + | Some fields -> List.length fields * 8 + | None -> Crash.crash $"payloadSize: Record type '{name}' not found in typeReg" + | AST.TList _ -> 24 // [tag, head, tail] - same size for all element types + | AST.TSum _ -> 16 // [tag, payload] + | AST.TDict _ -> 8 // Root pointer only (HAMT structure is variable-sized raw memory) + | _ -> 0 // Non-heap types + +/// Determine reference-count dispatch kind for a heap type +let rcKind (t: AST.Type) : RcKind = + match t with + | AST.TList (AST.TFunction _) -> GenericHeap + | AST.TList _ -> TaggedList + | _ -> GenericHeap + +// ============================================================================ +// Coverage Types +// ============================================================================ + +/// Unique expression ID for coverage tracking +type ExprId = int + +/// Expression ID generator (functional style, like VarGen) +type ExprIdGen = ExprIdGen of int + +/// Generate a fresh expression ID +let freshExprId (ExprIdGen n) : ExprId * ExprIdGen = + (n, ExprIdGen (n + 1)) + +/// Initial expression ID generator +let initialExprIdGen = ExprIdGen 0 + +/// Coverage mapping: tracks expression descriptions for reporting +type CoverageMapping = { + /// ExprId -> description string (e.g., "List.map: Call filter") + Descriptions: Map + /// Total number of expressions tracked + TotalExpressions: int +} + +/// Empty coverage mapping +let emptyCoverageMapping : CoverageMapping = { + Descriptions = Map.empty + TotalExpressions = 0 +} + +/// Add an expression to the coverage mapping +let addCoverageEntry (exprId: ExprId) (description: string) (mapping: CoverageMapping) : CoverageMapping = + { mapping with + Descriptions = Map.add exprId description mapping.Descriptions + TotalExpressions = max mapping.TotalExpressions (exprId + 1) } diff --git a/backend/src/LibCompiler/ARM64.fs b/backend/src/LibCompiler/ARM64.fs new file mode 100644 index 0000000000..db0c25f110 --- /dev/null +++ b/backend/src/LibCompiler/ARM64.fs @@ -0,0 +1,172 @@ +// ARM64.fs - ARM64 Instruction Types +// +// Defines ARM64 instruction and register types. +// +// ARM64 is a RISC architecture with fixed 32-bit instruction width. +// These types represent ARM64 assembly instructions that will be encoded +// to machine code by the ARM64_Encoding pass. +// +// Supported instructions: +// - MOVZ/MOVK: Load immediate values (16-bit chunks) +// - ADD/SUB: Arithmetic (immediate and register forms) +// - MUL/SDIV: Multiplication and signed division +// - MOV: Register-to-register move +// - STP/LDP: Store/Load pair (for stack frames) +// - STR/LDR: Store/Load register (for stack slots) +// - BL: Branch with link (function calls) +// - RET: Return from function +// +// Example instructions: +// MOVZ X0, #42, LSL #0 +// ADD X1, X0, #5 +// RET + +module ARM64 + +/// ARM64 general-purpose registers +type Reg = + | X0 | X1 | X2 | X3 | X4 | X5 | X6 | X7 | X8 | X9 + | X10 | X11 | X12 | X13 | X14 | X15 | X16 | X17 // X16/X17 are IP0/IP1 scratch registers + | X19 | X20 | X21 | X22 | X23 | X24 | X25 | X26 | X27 // Callee-saved + | X28 // Reserved for heap pointer + | X29 | X30 | SP + +/// ARM64 floating-point registers (D0-D31 for double precision) +/// D0-D7: Argument/result registers (caller-saved) +/// D8-D15: Callee-saved registers +/// D16-D31: Additional caller-saved registers +type FReg = + | D0 | D1 | D2 | D3 | D4 | D5 | D6 | D7 + | D8 | D9 | D10 | D11 | D12 | D13 | D14 | D15 + | D16 // Used as temp for FArgMoves cycle breaking + | D17 // Used as temp for binary ops (right operand) + | D18 // Used as temp for binary ops (left operand) + | D19 | D20 | D21 | D22 | D23 | D24 | D25 | D26 // Used for float call arg temps + | D27 | D28 | D29 | D30 | D31 // Additional SSA temp registers + +/// Comparison conditions (for CSET) +type Condition = + | EQ // Equal (Z set) + | NE // Not equal (Z clear) + | LT // Less than (signed) + | GT // Greater than (signed) + | LE // Less than or equal (signed) + | GE // Greater than or equal (signed) + +/// ARM64 instruction types +type Instr = + | MOVZ of dest:Reg * imm:uint16 * shift:int // Move with zero + | MOVN of dest:Reg * imm:uint16 * shift:int // Move with NOT (for negative constants) + | MOVK of dest:Reg * imm:uint16 * shift:int // Move with keep + | ADD_imm of dest:Reg * src:Reg * imm:uint16 + | ADD_reg of dest:Reg * src1:Reg * src2:Reg + | ADD_shifted of dest:Reg * src1:Reg * src2:Reg * shift:int // ADD with shifted register: dest = src1 + (src2 << shift) + | SUB_imm of dest:Reg * src:Reg * imm:uint16 + | SUB_imm12 of dest:Reg * src:Reg * imm:uint16 // SUB with shift=12, value = imm * 4096 + | SUB_reg of dest:Reg * src1:Reg * src2:Reg + | SUB_shifted of dest:Reg * src1:Reg * src2:Reg * shift:int // SUB with shifted register: dest = src1 - (src2 << shift) + | SUBS_imm of dest:Reg * src:Reg * imm:uint16 // SUB and set flags (for fused SUB+CMP) + | MUL of dest:Reg * src1:Reg * src2:Reg + | SDIV of dest:Reg * src1:Reg * src2:Reg + | UDIV of dest:Reg * src1:Reg * src2:Reg // Unsigned division (for positive integers) + | MSUB of dest:Reg * src1:Reg * src2:Reg * src3:Reg // Multiply-subtract: dest = src3 - src1 * src2 (for modulo) + | MADD of dest:Reg * src1:Reg * src2:Reg * src3:Reg // Multiply-add: dest = src3 + src1 * src2 + | CMP_imm of src:Reg * imm:uint16 // Compare with immediate (sets condition flags) + | CMP_reg of src1:Reg * src2:Reg // Compare registers (sets condition flags) + | CSET of dest:Reg * cond:Condition // Set register to 1 if condition, 0 otherwise + | AND_reg of dest:Reg * src1:Reg * src2:Reg // Bitwise AND + | AND_imm of dest:Reg * src:Reg * imm:uint64 // Bitwise AND with immediate (bitmask) + | ORR_reg of dest:Reg * src1:Reg * src2:Reg // Bitwise OR + | EOR_reg of dest:Reg * src1:Reg * src2:Reg // Bitwise XOR (exclusive or) + | LSL_reg of dest:Reg * src:Reg * shift:Reg // Logical shift left by register + | LSR_reg of dest:Reg * src:Reg * shift:Reg // Logical shift right by register + | LSL_imm of dest:Reg * src:Reg * shift:int // Logical shift left by immediate (0-63) + | LSR_imm of dest:Reg * src:Reg * shift:int // Logical shift right by immediate (0-63) + | MVN of dest:Reg * src:Reg // Bitwise NOT + | MOV_reg of dest:Reg * src:Reg + | STRB of src:Reg * addr:Reg * offset:int // Store byte [addr + offset] = src (lower 8 bits) + | LDRB of dest:Reg * baseAddr:Reg * index:Reg // Load byte with register offset: dest = [baseAddr + index] + | LDRB_imm of dest:Reg * baseAddr:Reg * offset:int // Load byte with immediate offset: dest = [baseAddr + offset] + | STRB_reg of src:Reg * addr:Reg // Store byte: [addr] = src (lower 8 bits) + // Stack operations (for function calls and stack frames) + | STP of reg1:Reg * reg2:Reg * addr:Reg * offset:int16 // Store pair: [addr + offset] = reg1, [addr + offset + 8] = reg2 + | STP_pre of reg1:Reg * reg2:Reg * addr:Reg * offset:int16 // Store pair with pre-index: addr += offset, then store + | LDP of reg1:Reg * reg2:Reg * addr:Reg * offset:int16 // Load pair: reg1 = [addr + offset], reg2 = [addr + offset + 8] + | LDP_post of reg1:Reg * reg2:Reg * addr:Reg * offset:int16 // Load pair with post-index: load, then addr += offset + | STR of src:Reg * addr:Reg * offset:int16 // Store register (unsigned offset): [addr + offset] = src (64-bit) + | LDR of dest:Reg * addr:Reg * offset:int16 // Load register (unsigned offset): dest = [addr + offset] (64-bit) + | STUR of src:Reg * addr:Reg * offset:int16 // Store register (signed offset, -256 to +255): [addr + offset] = src (64-bit) + | LDUR of dest:Reg * addr:Reg * offset:int16 // Load register (signed offset, -256 to +255): dest = [addr + offset] (64-bit) + | BL of label:string // Branch with link: call function at label (sets X30/LR to return address) + | BLR of reg:Reg // Branch with link to register: call function at address in reg (indirect call) + | BR of reg:Reg // Branch to register without link: tail call to address in reg (no return) + // Label-based branches (for compiler-generated code with CFG) + | CBZ of reg:Reg * label:string // Compare and branch if zero (label will be resolved) + | CBNZ of reg:Reg * label:string // Compare and branch if not zero + | B_label of label:string // Unconditional branch to label + | B_cond_label of cond:Condition * label:string // Conditional branch to label + // Offset-based branches (for handcrafted runtime code with known offsets) + | CBZ_offset of reg:Reg * offset:int // CBZ with immediate offset + | CBNZ_offset of reg:Reg * offset:int // CBNZ with immediate offset + | TBZ of reg:Reg * bit:int * offset:int // Test bit and branch if zero + | TBNZ of reg:Reg * bit:int * offset:int // Test bit and branch if not zero + | TBZ_label of reg:Reg * bit:int * label:string // Test bit and branch if zero (label will be resolved) + | TBNZ_label of reg:Reg * bit:int * label:string // Test bit and branch if not zero (label will be resolved) + | B of offset:int // Unconditional branch with immediate offset + | B_cond of cond:Condition * offset:int // Conditional branch with immediate offset + | NEG of dest:Reg * src:Reg // Negate: dest = 0 - src + | RET + | SVC of imm:uint16 // Supervisor call (syscall) + | Label of string // Pseudo-instruction: marks a label position + // PC-relative addressing for .rodata access + | ADRP of dest:Reg * label:string // Address page: dest = PC-relative page address of label + | ADD_label of dest:Reg * src:Reg * label:string // Add label offset: dest = src + page offset of label + | ADR of dest:Reg * label:string // PC-relative address: dest = address of label (±1MB range) + // Floating-point instructions + | LDR_fp of dest:FReg * addr:Reg * offset:int16 // Load double from [addr + offset] + | STR_fp of src:FReg * addr:Reg * offset:int16 // Store double to [addr + offset] + | STP_fp of freg1:FReg * freg2:FReg * addr:Reg * offset:int16 // Store FP pair: [addr + offset] = freg1, [addr + offset + 8] = freg2 + | LDP_fp of freg1:FReg * freg2:FReg * addr:Reg * offset:int16 // Load FP pair: freg1 = [addr + offset], freg2 = [addr + offset + 8] + | FADD of dest:FReg * src1:FReg * src2:FReg // FP add: dest = src1 + src2 + | FSUB of dest:FReg * src1:FReg * src2:FReg // FP sub: dest = src1 - src2 + | FMUL of dest:FReg * src1:FReg * src2:FReg // FP mul: dest = src1 * src2 + | FDIV of dest:FReg * src1:FReg * src2:FReg // FP div: dest = src1 / src2 + | FNEG of dest:FReg * src:FReg // FP negate: dest = -src + | FABS of dest:FReg * src:FReg // FP absolute value: dest = |src| + | FSQRT of dest:FReg * src:FReg // FP square root: dest = sqrt(src) + | FCMP of src1:FReg * src2:FReg // FP compare (sets condition flags) + | FMOV_reg of dest:FReg * src:FReg // FP move between registers + | FMOV_to_gp of dest:Reg * src:FReg // FP to GP register (bit-for-bit) + | FMOV_from_gp of dest:FReg * src:Reg // GP to FP register (bit-for-bit) + | SCVTF of dest:FReg * src:Reg // Signed int to FP: dest = (double)src + | FCVTZS of dest:Reg * src:FReg // FP to signed int (truncate): dest = (int64)src + // Sign/zero extension instructions (for integer overflow truncation) + | SXTB of dest:Reg * src:Reg // Sign-extend byte: dest = sign_extend(src[7:0]) + | SXTH of dest:Reg * src:Reg // Sign-extend halfword: dest = sign_extend(src[15:0]) + | SXTW of dest:Reg * src:Reg // Sign-extend word: dest = sign_extend(src[31:0]) + | UXTB of dest:Reg * src:Reg // Zero-extend byte: dest = zero_extend(src[7:0]) + | UXTH of dest:Reg * src:Reg // Zero-extend halfword: dest = zero_extend(src[15:0]) + | UXTW of dest:Reg * src:Reg // Zero-extend word: dest = zero_extend(src[31:0]) + +/// Machine code (32-bit instruction) +type MachineCode = uint32 + +/// ARM64-specific syscall invocation details (layered on top of Platform.SyscallNumbers). +/// Platform.fs intentionally has no ARM64 dependency, so these are defined here. +type SyscallConfig = { + Numbers: Platform.SyscallNumbers + SvcImmediate: uint16 // SVC instruction immediate value + SyscallRegister: Reg // Register to hold syscall number (X16 macOS, X8 Linux) +} + +/// Build the ARM64-specific syscall config for the given OS. +let syscallConfigFor (os: Platform.OS) : SyscallConfig = + match os with + | Platform.MacOS -> + { Numbers = Platform.syscallNumbersFor Platform.MacOS Platform.ARM64 + SvcImmediate = 0x80us + SyscallRegister = X16 } + | Platform.Linux -> + { Numbers = Platform.syscallNumbersFor Platform.Linux Platform.ARM64 + SvcImmediate = 0us + SyscallRegister = X8 } diff --git a/backend/src/LibCompiler/ARM64Symbolic.fs b/backend/src/LibCompiler/ARM64Symbolic.fs new file mode 100644 index 0000000000..d550d6d89b --- /dev/null +++ b/backend/src/LibCompiler/ARM64Symbolic.fs @@ -0,0 +1,285 @@ +// ARM64Symbolic.fs - Symbolic ARM64 Instruction Types +// +// Defines ARM64 instructions with explicit data label references so that +// string/float literals can stay symbolic until final emission. + +module ARM64Symbolic + +/// Reuse ARM64 register and condition types +type Reg = ARM64.Reg +type FReg = ARM64.FReg +type Condition = ARM64.Condition + +// Re-export register values for convenience in codegen +let X0: Reg = ARM64.X0 +let X1: Reg = ARM64.X1 +let X2: Reg = ARM64.X2 +let X3: Reg = ARM64.X3 +let X4: Reg = ARM64.X4 +let X5: Reg = ARM64.X5 +let X6: Reg = ARM64.X6 +let X7: Reg = ARM64.X7 +let X8: Reg = ARM64.X8 +let X9: Reg = ARM64.X9 +let X10: Reg = ARM64.X10 +let X11: Reg = ARM64.X11 +let X12: Reg = ARM64.X12 +let X13: Reg = ARM64.X13 +let X14: Reg = ARM64.X14 +let X15: Reg = ARM64.X15 +let X16: Reg = ARM64.X16 +let X17: Reg = ARM64.X17 +let X19: Reg = ARM64.X19 +let X20: Reg = ARM64.X20 +let X21: Reg = ARM64.X21 +let X22: Reg = ARM64.X22 +let X23: Reg = ARM64.X23 +let X24: Reg = ARM64.X24 +let X25: Reg = ARM64.X25 +let X26: Reg = ARM64.X26 +let X27: Reg = ARM64.X27 +let X28: Reg = ARM64.X28 +let X29: Reg = ARM64.X29 +let X30: Reg = ARM64.X30 +let SP: Reg = ARM64.SP + +let D0: FReg = ARM64.D0 +let D1: FReg = ARM64.D1 +let D2: FReg = ARM64.D2 +let D3: FReg = ARM64.D3 +let D4: FReg = ARM64.D4 +let D5: FReg = ARM64.D5 +let D6: FReg = ARM64.D6 +let D7: FReg = ARM64.D7 +let D8: FReg = ARM64.D8 +let D9: FReg = ARM64.D9 +let D10: FReg = ARM64.D10 +let D11: FReg = ARM64.D11 +let D12: FReg = ARM64.D12 +let D13: FReg = ARM64.D13 +let D14: FReg = ARM64.D14 +let D15: FReg = ARM64.D15 +let D16: FReg = ARM64.D16 +let D17: FReg = ARM64.D17 +let D18: FReg = ARM64.D18 +let D19: FReg = ARM64.D19 +let D20: FReg = ARM64.D20 +let D21: FReg = ARM64.D21 +let D22: FReg = ARM64.D22 +let D23: FReg = ARM64.D23 +let D24: FReg = ARM64.D24 +let D25: FReg = ARM64.D25 +let D26: FReg = ARM64.D26 +let D27: FReg = ARM64.D27 +let D28: FReg = ARM64.D28 +let D29: FReg = ARM64.D29 +let D30: FReg = ARM64.D30 +let D31: FReg = ARM64.D31 + +let EQ: Condition = ARM64.EQ +let NE: Condition = ARM64.NE +let LT: Condition = ARM64.LT +let GT: Condition = ARM64.GT +let LE: Condition = ARM64.LE +let GE: Condition = ARM64.GE + +/// Data references for late pool resolution +type DataRef = + | StringLiteral of string + | FloatLiteral of float + | Named of string + +/// Label reference (code vs data) +type LabelRef = + | CodeLabel of string + | DataLabel of DataRef + +/// ARM64 instruction types (symbolic label refs for data) +type Instr = + | MOVZ of dest:Reg * imm:uint16 * shift:int + | MOVN of dest:Reg * imm:uint16 * shift:int + | MOVK of dest:Reg * imm:uint16 * shift:int + | ADD_imm of dest:Reg * src:Reg * imm:uint16 + | ADD_reg of dest:Reg * src1:Reg * src2:Reg + | ADD_shifted of dest:Reg * src1:Reg * src2:Reg * shift:int + | SUB_imm of dest:Reg * src:Reg * imm:uint16 + | SUB_imm12 of dest:Reg * src:Reg * imm:uint16 + | SUB_reg of dest:Reg * src1:Reg * src2:Reg + | SUB_shifted of dest:Reg * src1:Reg * src2:Reg * shift:int + | SUBS_imm of dest:Reg * src:Reg * imm:uint16 + | MUL of dest:Reg * src1:Reg * src2:Reg + | SDIV of dest:Reg * src1:Reg * src2:Reg + | UDIV of dest:Reg * src1:Reg * src2:Reg + | MSUB of dest:Reg * src1:Reg * src2:Reg * src3:Reg + | MADD of dest:Reg * src1:Reg * src2:Reg * src3:Reg + | CMP_imm of src:Reg * imm:uint16 + | CMP_reg of src1:Reg * src2:Reg + | CSET of dest:Reg * cond:Condition + | AND_reg of dest:Reg * src1:Reg * src2:Reg + | AND_imm of dest:Reg * src:Reg * imm:uint64 + | ORR_reg of dest:Reg * src1:Reg * src2:Reg + | EOR_reg of dest:Reg * src1:Reg * src2:Reg + | LSL_reg of dest:Reg * src:Reg * shift:Reg + | LSR_reg of dest:Reg * src:Reg * shift:Reg + | LSL_imm of dest:Reg * src:Reg * shift:int + | LSR_imm of dest:Reg * src:Reg * shift:int + | MVN of dest:Reg * src:Reg + | MOV_reg of dest:Reg * src:Reg + | STRB of src:Reg * addr:Reg * offset:int + | LDRB of dest:Reg * baseAddr:Reg * index:Reg + | LDRB_imm of dest:Reg * baseAddr:Reg * offset:int + | STRB_reg of src:Reg * addr:Reg + | STP of reg1:Reg * reg2:Reg * addr:Reg * offset:int16 + | STP_pre of reg1:Reg * reg2:Reg * addr:Reg * offset:int16 + | LDP of reg1:Reg * reg2:Reg * addr:Reg * offset:int16 + | LDP_post of reg1:Reg * reg2:Reg * addr:Reg * offset:int16 + | STR of src:Reg * addr:Reg * offset:int16 + | LDR of dest:Reg * addr:Reg * offset:int16 + | STUR of src:Reg * addr:Reg * offset:int16 + | LDUR of dest:Reg * addr:Reg * offset:int16 + | BL of label:string + | BLR of reg:Reg + | BR of reg:Reg + | CBZ of reg:Reg * label:string + | CBNZ of reg:Reg * label:string + | B_label of label:string + | B_cond_label of cond:Condition * label:string + | CBZ_offset of reg:Reg * offset:int + | CBNZ_offset of reg:Reg * offset:int + | TBZ of reg:Reg * bit:int * offset:int + | TBNZ of reg:Reg * bit:int * offset:int + | TBZ_label of reg:Reg * bit:int * label:string + | TBNZ_label of reg:Reg * bit:int * label:string + | B of offset:int + | B_cond of cond:Condition * offset:int + | NEG of dest:Reg * src:Reg + | RET + | SVC of imm:uint16 + | Label of string + | ADRP of dest:Reg * label:LabelRef + | ADD_label of dest:Reg * src:Reg * label:LabelRef + | ADR of dest:Reg * label:LabelRef + | LDR_fp of dest:FReg * addr:Reg * offset:int16 + | STR_fp of src:FReg * addr:Reg * offset:int16 + | STP_fp of freg1:FReg * freg2:FReg * addr:Reg * offset:int16 + | LDP_fp of freg1:FReg * freg2:FReg * addr:Reg * offset:int16 + | FADD of dest:FReg * src1:FReg * src2:FReg + | FSUB of dest:FReg * src1:FReg * src2:FReg + | FMUL of dest:FReg * src1:FReg * src2:FReg + | FDIV of dest:FReg * src1:FReg * src2:FReg + | FNEG of dest:FReg * src:FReg + | FABS of dest:FReg * src:FReg + | FSQRT of dest:FReg * src:FReg + | FCMP of src1:FReg * src2:FReg + | FMOV_reg of dest:FReg * src:FReg + | FMOV_to_gp of dest:Reg * src:FReg + | FMOV_from_gp of dest:FReg * src:Reg + | SCVTF of dest:FReg * src:Reg + | FCVTZS of dest:Reg * src:FReg + | SXTB of dest:Reg * src:Reg + | SXTH of dest:Reg * src:Reg + | SXTW of dest:Reg * src:Reg + | UXTB of dest:Reg * src:Reg + | UXTH of dest:Reg * src:Reg + | UXTW of dest:Reg * src:Reg + +/// Classify labels from concrete ARM64 instructions +let private classifyLabel (name: string) : LabelRef = + match name with + | "_coverage_data" -> DataLabel (Named name) + | "_leak_count" -> DataLabel (Named name) + | _ -> CodeLabel name + +/// Convert concrete ARM64 instruction to symbolic (for runtime helpers) +let ofARM64 (instr: ARM64.Instr) : Instr = + match instr with + | ARM64.MOVZ (dest, imm, shift) -> MOVZ (dest, imm, shift) + | ARM64.MOVN (dest, imm, shift) -> MOVN (dest, imm, shift) + | ARM64.MOVK (dest, imm, shift) -> MOVK (dest, imm, shift) + | ARM64.ADD_imm (dest, src, imm) -> ADD_imm (dest, src, imm) + | ARM64.ADD_reg (dest, src1, src2) -> ADD_reg (dest, src1, src2) + | ARM64.ADD_shifted (dest, src1, src2, shift) -> ADD_shifted (dest, src1, src2, shift) + | ARM64.SUB_imm (dest, src, imm) -> SUB_imm (dest, src, imm) + | ARM64.SUB_imm12 (dest, src, imm) -> SUB_imm12 (dest, src, imm) + | ARM64.SUB_reg (dest, src1, src2) -> SUB_reg (dest, src1, src2) + | ARM64.SUB_shifted (dest, src1, src2, shift) -> SUB_shifted (dest, src1, src2, shift) + | ARM64.SUBS_imm (dest, src, imm) -> SUBS_imm (dest, src, imm) + | ARM64.MUL (dest, src1, src2) -> MUL (dest, src1, src2) + | ARM64.SDIV (dest, src1, src2) -> SDIV (dest, src1, src2) + | ARM64.UDIV (dest, src1, src2) -> UDIV (dest, src1, src2) + | ARM64.MSUB (dest, src1, src2, src3) -> MSUB (dest, src1, src2, src3) + | ARM64.MADD (dest, src1, src2, src3) -> MADD (dest, src1, src2, src3) + | ARM64.CMP_imm (src, imm) -> CMP_imm (src, imm) + | ARM64.CMP_reg (src1, src2) -> CMP_reg (src1, src2) + | ARM64.CSET (dest, cond) -> CSET (dest, cond) + | ARM64.AND_reg (dest, src1, src2) -> AND_reg (dest, src1, src2) + | ARM64.AND_imm (dest, src, imm) -> AND_imm (dest, src, imm) + | ARM64.ORR_reg (dest, src1, src2) -> ORR_reg (dest, src1, src2) + | ARM64.EOR_reg (dest, src1, src2) -> EOR_reg (dest, src1, src2) + | ARM64.LSL_reg (dest, src, shift) -> LSL_reg (dest, src, shift) + | ARM64.LSR_reg (dest, src, shift) -> LSR_reg (dest, src, shift) + | ARM64.LSL_imm (dest, src, shift) -> LSL_imm (dest, src, shift) + | ARM64.LSR_imm (dest, src, shift) -> LSR_imm (dest, src, shift) + | ARM64.MVN (dest, src) -> MVN (dest, src) + | ARM64.MOV_reg (dest, src) -> MOV_reg (dest, src) + | ARM64.STRB (src, addr, offset) -> STRB (src, addr, offset) + | ARM64.LDRB (dest, baseAddr, index) -> LDRB (dest, baseAddr, index) + | ARM64.LDRB_imm (dest, baseAddr, offset) -> LDRB_imm (dest, baseAddr, offset) + | ARM64.STRB_reg (src, addr) -> STRB_reg (src, addr) + | ARM64.STP (reg1, reg2, addr, offset) -> STP (reg1, reg2, addr, offset) + | ARM64.STP_pre (reg1, reg2, addr, offset) -> STP_pre (reg1, reg2, addr, offset) + | ARM64.LDP (reg1, reg2, addr, offset) -> LDP (reg1, reg2, addr, offset) + | ARM64.LDP_post (reg1, reg2, addr, offset) -> LDP_post (reg1, reg2, addr, offset) + | ARM64.STR (src, addr, offset) -> STR (src, addr, offset) + | ARM64.LDR (dest, addr, offset) -> LDR (dest, addr, offset) + | ARM64.STUR (src, addr, offset) -> STUR (src, addr, offset) + | ARM64.LDUR (dest, addr, offset) -> LDUR (dest, addr, offset) + | ARM64.BL label -> BL label + | ARM64.BLR reg -> BLR reg + | ARM64.BR reg -> BR reg + | ARM64.CBZ (reg, label) -> CBZ (reg, label) + | ARM64.CBNZ (reg, label) -> CBNZ (reg, label) + | ARM64.B_label label -> B_label label + | ARM64.B_cond_label (cond, label) -> B_cond_label (cond, label) + | ARM64.CBZ_offset (reg, offset) -> CBZ_offset (reg, offset) + | ARM64.CBNZ_offset (reg, offset) -> CBNZ_offset (reg, offset) + | ARM64.TBZ (reg, bit, offset) -> TBZ (reg, bit, offset) + | ARM64.TBNZ (reg, bit, offset) -> TBNZ (reg, bit, offset) + | ARM64.TBZ_label (reg, bit, label) -> TBZ_label (reg, bit, label) + | ARM64.TBNZ_label (reg, bit, label) -> TBNZ_label (reg, bit, label) + | ARM64.B offset -> B offset + | ARM64.B_cond (cond, offset) -> B_cond (cond, offset) + | ARM64.NEG (dest, src) -> NEG (dest, src) + | ARM64.RET -> RET + | ARM64.SVC imm -> SVC imm + | ARM64.Label name -> Label name + | ARM64.ADRP (dest, label) -> ADRP (dest, classifyLabel label) + | ARM64.ADD_label (dest, src, label) -> ADD_label (dest, src, classifyLabel label) + | ARM64.ADR (dest, label) -> ADR (dest, classifyLabel label) + | ARM64.LDR_fp (dest, addr, offset) -> LDR_fp (dest, addr, offset) + | ARM64.STR_fp (src, addr, offset) -> STR_fp (src, addr, offset) + | ARM64.STP_fp (freg1, freg2, addr, offset) -> STP_fp (freg1, freg2, addr, offset) + | ARM64.LDP_fp (freg1, freg2, addr, offset) -> LDP_fp (freg1, freg2, addr, offset) + | ARM64.FADD (dest, src1, src2) -> FADD (dest, src1, src2) + | ARM64.FSUB (dest, src1, src2) -> FSUB (dest, src1, src2) + | ARM64.FMUL (dest, src1, src2) -> FMUL (dest, src1, src2) + | ARM64.FDIV (dest, src1, src2) -> FDIV (dest, src1, src2) + | ARM64.FNEG (dest, src) -> FNEG (dest, src) + | ARM64.FABS (dest, src) -> FABS (dest, src) + | ARM64.FSQRT (dest, src) -> FSQRT (dest, src) + | ARM64.FCMP (src1, src2) -> FCMP (src1, src2) + | ARM64.FMOV_reg (dest, src) -> FMOV_reg (dest, src) + | ARM64.FMOV_to_gp (dest, src) -> FMOV_to_gp (dest, src) + | ARM64.FMOV_from_gp (dest, src) -> FMOV_from_gp (dest, src) + | ARM64.SCVTF (dest, src) -> SCVTF (dest, src) + | ARM64.FCVTZS (dest, src) -> FCVTZS (dest, src) + | ARM64.SXTB (dest, src) -> SXTB (dest, src) + | ARM64.SXTH (dest, src) -> SXTH (dest, src) + | ARM64.SXTW (dest, src) -> SXTW (dest, src) + | ARM64.UXTB (dest, src) -> UXTB (dest, src) + | ARM64.UXTH (dest, src) -> UXTH (dest, src) + | ARM64.UXTW (dest, src) -> UXTW (dest, src) + +/// Convert concrete ARM64 instruction list to symbolic +let ofARM64List (instrs: ARM64.Instr list) : Instr list = + instrs |> List.map ofARM64 diff --git a/backend/src/LibCompiler/AST.fs b/backend/src/LibCompiler/AST.fs new file mode 100644 index 0000000000..3664cccc9e --- /dev/null +++ b/backend/src/LibCompiler/AST.fs @@ -0,0 +1,235 @@ +// AST.fs - Abstract Syntax Tree +// +// Defines the abstract syntax tree data structures that represent the parsed +// program structure. The AST is the output of the Parser and input to the ANF +// transformation. +// +// Current language features: +// - Integer literals (64-bit signed) +// - Float literals (64-bit double) +// - Binary operators: +, -, *, / +// - Parenthesized expressions +// - Let bindings: let x = expr in body +// - Variables: identifiers bound by let +// +// Example AST for "let x = 5 in x + 3": +// Let("x", Int64Literal(5), BinOp(Add, Var("x"), Int64Literal(3))) + +module AST + +/// A list guaranteed to have at least one element (makes invalid states unrepresentable) +type NonEmptyList<'a> = { Head: 'a; Tail: 'a list } + +/// Compiler-wide warning settings passed from the driver into compiler passes. +type WarningSettings = { + WarnOnDuplicatePatternBindings: bool +} + +let defaultWarningSettings : WarningSettings = { + WarnOnDuplicatePatternBindings = true +} + +/// Type system - will be used for type checking in Phase 0+ +type Type = + // Signed integers + | TInt8 + | TInt16 + | TInt32 + | TInt64 + | TInt128 + // Unsigned integers + | TUInt8 + | TUInt16 + | TUInt32 + | TUInt64 + | TUInt128 + // Other primitives + | TBool + | TFloat64 + | TString + | TBytes // Byte array: [length:8][data:N][refcount:8] + | TChar // Extended Grapheme Cluster (single visual character) + | TUnit + | TRuntimeError // Bottom-like type for guaranteed runtime-failing expressions + | TFunction of Type list * Type // parameter types * return type + | TTuple of Type list // tuple type: (Int, Bool, String) + | TRecord of string * Type list // record type by name with type args: Point, Pair, etc. + | TSum of string * Type list // sum type by name with type args: Result + | TList of Type // List - polymorphic list type + | TVar of string // type variable: T, A, B, etc. (for generics) + | TRawPtr // Raw pointer to unmanaged memory (internal, for HAMT) + | TDict of keyType:Type * valueType:Type // Dict - HAMT dictionary (K=Int64 for now) + +/// Binary operators +type BinOp = + // Arithmetic + | Add + | Sub + | Mul + | Div + | Mod // % + // Bitwise operations + | Shl // << (left shift) + | Shr // >> (right shift) + | BitAnd // & (bitwise and) + | BitOr // | (bitwise or) + | BitXor // ^ (bitwise xor) + // String operations + | StringConcat // ++ + // Comparisons (return bool) + | Eq // == + | Neq // != + | Lt // < + | Gt // > + | Lte // <= + | Gte // >= + // Boolean operations + | And // && + | Or // || + +/// Unary operators +type UnaryOp = + | Neg // Unary negation: -expr + | Not // Boolean not: !expr + | BitNot // Bitwise not: ~~~expr + +/// NonEmptyList helper functions +module NonEmptyList = + let singleton x = { Head = x; Tail = [] } + let cons x nel = { Head = x; Tail = nel.Head :: nel.Tail } + let toList nel = nel.Head :: nel.Tail + let map f nel = { Head = f nel.Head; Tail = List.map f nel.Tail } + let length nel = 1 + List.length nel.Tail + let appendList nel items = { Head = nel.Head; Tail = nel.Tail @ items } + let snoc nel item = { Head = nel.Head; Tail = nel.Tail @ [item] } + let head nel = nel.Head + let tryFromList = function + | [] -> None + | h :: t -> Some { Head = h; Tail = t } + let fromList = function + | [] -> Crash.crash "NonEmptyList.fromList: empty list" + | h :: t -> { Head = h; Tail = t } + +/// Pattern matching patterns +type Pattern = + | PUnit // () - matches unit value + | PWildcard // _ + | PVar of string // x (binds value to variable) + | PConstructor of variantName:string * payload:Pattern option // Red, Some(x) + | PInt64 of int64 // 42 (Int64 literal) + | PInt128Literal of System.Int128 // 42Q + | PInt8Literal of sbyte // 1y + | PInt16Literal of int16 // 1s + | PInt32Literal of int32 // 1l + | PUInt8Literal of byte // 1uy + | PUInt16Literal of uint16 // 1us + | PUInt32Literal of uint32 // 1ul + | PUInt64Literal of uint64 // 1UL + | PUInt128Literal of System.UInt128 // 42Z + | PBool of bool // true, false + | PString of string // "hello" + | PChar of string // 'x' + | PFloat of float // 3.14 + | PTuple of Pattern list // (a, b, c) + | PRecord of typeName:string * fields:(string * Pattern) list // { x = a, y = b } + | PList of Pattern list // [a, b, c] - exact length match + | PListCons of head:Pattern list * tail:Pattern // [a, b, ...t] - head elements + rest + +/// Part of an interpolated string: either a literal or an expression +type StringPart = + | StringText of string // Literal text: "Hello " + | StringExpr of Expr // Interpolated expression: {name} + +/// Expression nodes +and Expr = + | UnitLiteral // Unit value: () + | Int64Literal of int64 // 64-bit signed (default): 42, 42L + | Int128Literal of System.Int128 // 42Q + | Int8Literal of sbyte // 8-bit signed: 42y + | Int16Literal of int16 // 16-bit signed: 42s + | Int32Literal of int32 // 32-bit signed: 42l + | UInt8Literal of byte // 8-bit unsigned: 42uy + | UInt16Literal of uint16 // 16-bit unsigned: 42us + | UInt32Literal of uint32 // 32-bit unsigned: 42ul + | UInt64Literal of uint64 // 64-bit unsigned: 42UL + | UInt128Literal of System.UInt128 // 42Z + | BoolLiteral of bool + | StringLiteral of string + | CharLiteral of string // Single Extended Grapheme Cluster stored as UTF-8 string + | FloatLiteral of float + | InterpolatedString of StringPart list // $"Hello {name}!" + | BinOp of BinOp * Expr * Expr + | UnaryOp of UnaryOp * Expr + | Let of name:string * value:Expr * body:Expr // Let binding: let name = value in body + | Var of string // Variable reference + | If of cond:Expr * thenBranch:Expr * elseBranch:Expr // If expression: if cond then thenBranch else elseBranch + | Call of funcName:string * args:NonEmptyList // Function call: funcName(arg1, arg2, ...) + | TypeApp of funcName:string * typeArgs:Type list * args:NonEmptyList // Generic call: funcName(args) + | TupleLiteral of Expr list // Tuple literal: (1, 2, 3) + | TupleAccess of tuple:Expr * index:int // Tuple access: t.0, t.1, etc. + | RecordLiteral of typeName:string * fields:(string * Expr) list // { x = 1, y = 2 } + | RecordUpdate of record:Expr * updates:(string * Expr) list // { record with x = 1, y = 2 } + | RecordAccess of record:Expr * fieldName:string // p.x, p.y + | Constructor of typeName:string * variantName:string * payload:Expr option // Red, Some(42) + | Match of scrutinee:Expr * cases:MatchCase list // match e with | p1 when g -> e1 | p2 -> e2 + | ListLiteral of Expr list // [1, 2, 3] + | ListCons of head:Expr list * tail:Expr // [a, b, ...rest] + | Lambda of parameters:NonEmptyList<(string * Type)> * body:Expr // (x: int) => x + 1 + | Apply of func:Expr * args:NonEmptyList // Apply function expr: f(x) where f is expression + | FuncRef of funcName:string // Reference to a function (for passing as value) + | Closure of funcName:string * captures:Expr list // Closure: function + captured values + +/// Match case with optional guard clause and pattern grouping +/// Syntax: | pat1 | pat2 when guard -> body +and MatchCase = { + Patterns: NonEmptyList // One or more patterns (pattern grouping via |) + Guard: Expr option // Optional guard clause (when condition) + Body: Expr // Body expression +} + +/// Function definition +type FunctionDef = { + Name: string + TypeParams: string list // Type parameters for generics: ["T", "U", etc.], empty for non-generic + Params: NonEmptyList<(string * Type)> // Parameter names with REQUIRED type annotations + ReturnType: Type // REQUIRED return type annotation + Body: Expr +} + +/// Variant in a sum type (with optional payload type for M4) +type Variant = { + Name: string + Payload: Type option // None for simple enums, Some for payloads (M4) +} + +/// Type definition (record types, sum types, etc.) +type TypeDef = + | RecordDef of name:string * typeParams:string list * fields:(string * Type) list // type Point = { x: T, y: T } + | SumTypeDef of name:string * typeParams:string list * variants:Variant list // type Result = Ok of T | Error of E + | TypeAlias of name:string * typeParams:string list * targetType:Type // type Id = String + +/// Top-level program elements +type TopLevel = + | FunctionDef of FunctionDef + | TypeDef of TypeDef + | Expression of Expr + +/// Program is a list of top-level definitions (functions and/or expressions) +type Program = Program of TopLevel list + +/// Module function definition - a function within a module +type ModuleFunc = { + Name: string // Function name (e.g., "add") + TypeParams: string list // Type parameters (e.g., ["v"] for generic intrinsics) + ParamTypes: Type list // Parameter types (may contain TVar references) + ReturnType: Type // Return type (may contain TVar references) +} + +/// Module definition - represents a namespace of functions +type ModuleDef = { + Name: string // Full module path (e.g., "Stdlib.Int64") + Functions: ModuleFunc list // Functions in this module +} + +/// Module registry - maps full function paths to their definitions +type ModuleRegistry = Map diff --git a/backend/src/LibCompiler/ASTPrettyPrinter.fs b/backend/src/LibCompiler/ASTPrettyPrinter.fs new file mode 100644 index 0000000000..e38cc148ed --- /dev/null +++ b/backend/src/LibCompiler/ASTPrettyPrinter.fs @@ -0,0 +1,861 @@ +// ASTPrettyPrinter.fs - Pretty printers for Darklang source syntaxes. +// +// Formats the shared AST into compiler syntax or interpreter syntax. + +module ASTPrettyPrinter + +open AST + +type Syntax = + | CompilerSyntax + | InterpreterSyntax + +let private escapeStringContent (input: string) : string = + input + |> String.collect (fun c -> + match c with + | '\\' -> "\\\\" + | '"' -> "\\\"" + | '\n' -> "\\n" + | '\r' -> "\\r" + | '\t' -> "\\t" + | '\000' -> "\\0" + | _ -> string c) + +let private escapeCharContent (input: string) : string = + input + |> String.collect (fun c -> + match c with + | '\\' -> "\\\\" + | '\'' -> "\\'" + | '\n' -> "\\n" + | '\r' -> "\\r" + | '\t' -> "\\t" + | '\000' -> "\\0" + | _ -> string c) + +let private formatFloatLiteral (value: float) : string = + let raw = value.ToString("R", System.Globalization.CultureInfo.InvariantCulture) + let containsLetters = raw |> Seq.exists System.Char.IsLetter + if containsLetters || raw.Contains(".") || raw.Contains("E") || raw.Contains("e") then + raw + else + $"{raw}.0" + +let private reservedIdentifierNames : Set = + set [ + "let" + "in" + "if" + "then" + "else" + "def" + "type" + "of" + "match" + "with" + "when" + "fun" + "true" + "false" + "_" + ] + +let private isIdentifierStartChar (c: char) : bool = + System.Char.IsLetter(c) || c = '_' + +let private isIdentifierContinueChar (c: char) : bool = + System.Char.IsLetterOrDigit(c) || c = '_' + +let private isBareIdentifierSegment (name: string) : bool = + name.Length > 0 + && isIdentifierStartChar name[0] + && (name |> Seq.forall isIdentifierContinueChar) + && not (Set.contains name reservedIdentifierNames) + +let private formatIdentifierSegment (name: string) : string = + if isBareIdentifierSegment name then + name + else + $"``{name}``" + +let private formatIdentifierPath (name: string) : string = + if name.Contains "." then + name.Split('.') + |> Array.toList + |> List.map formatIdentifierSegment + |> String.concat "." + else + formatIdentifierSegment name + +let rec private formatType (typ: Type) : string = + match typ with + | TInt8 -> "Int8" + | TInt16 -> "Int16" + | TInt32 -> "Int32" + | TInt64 -> "Int64" + | TInt128 -> "Int128" + | TUInt8 -> "UInt8" + | TUInt16 -> "UInt16" + | TUInt32 -> "UInt32" + | TUInt64 -> "UInt64" + | TUInt128 -> "UInt128" + | TBool -> "Bool" + | TFloat64 -> "Float" + | TString -> "String" + | TBytes -> "Bytes" + | TChar -> "Char" + | TUnit -> "Unit" + | TRuntimeError -> "RuntimeError" + | TRawPtr -> "RawPtr" + | TVar name -> formatIdentifierSegment name + | TList elemType -> $"List<{formatType elemType}>" + | TDict (keyType, valueType) -> $"Dict<{formatType keyType}, {formatType valueType}>" + | TTuple elemTypes -> + let elemText = elemTypes |> List.map formatType |> String.concat ", " + $"({elemText})" + | TRecord (name, []) -> formatIdentifierPath name + | TRecord (name, typeArgs) -> + let argsText = typeArgs |> List.map formatType |> String.concat ", " + $"{formatIdentifierPath name}<{argsText}>" + | TSum (name, []) -> formatIdentifierPath name + | TSum (name, typeArgs) -> + let argsText = typeArgs |> List.map formatType |> String.concat ", " + $"{formatIdentifierPath name}<{argsText}>" + | TFunction (paramTypes, returnType) -> + let paramsText = paramTypes |> List.map formatType |> String.concat ", " + $"({paramsText}) -> {formatType returnType}" + +let private formatBinOp (op: BinOp) : string = + match op with + | Add -> "+" + | Sub -> "-" + | Mul -> "*" + | Div -> "/" + | Mod -> "%" + | Shl -> "<<" + | Shr -> ">>" + | BitAnd -> "&" + | BitOr -> "|||" + | BitXor -> "^" + | StringConcat -> "++" + | Eq -> "==" + | Neq -> "!=" + | Lt -> "<" + | Gt -> ">" + | Lte -> "<=" + | Gte -> ">=" + | And -> "&&" + | Or -> "||" + +let private formatUnaryOp (op: UnaryOp) : string = + match op with + | Neg -> "-" + | Not -> "!" + | BitNot -> "~~~" + +let private isComparisonOp (op: BinOp) : bool = + match op with + | Eq + | Neq + | Lt + | Gt + | Lte + | Gte -> true + | _ -> false + +let private binOpPrecedence (op: BinOp) : int = + match op with + | Or -> 1 + | And -> 2 + | BitOr -> 3 + | BitXor -> 4 + | BitAnd -> 5 + | Eq + | Neq + | Lt + | Gt + | Lte + | Gte -> 6 + | Shl + | Shr -> 7 + | Add + | Sub + | StringConcat -> 8 + | Mul + | Div + | Mod -> 9 + +let private shouldParenthesizeBinChild (parentOp: BinOp) (isLeftChild: bool) (childOp: BinOp) : bool = + let parentPrec = binOpPrecedence parentOp + let childPrec = binOpPrecedence childOp + if childPrec < parentPrec then + true + elif childPrec > parentPrec then + false + elif isComparisonOp parentOp then + true + else + // Operators are left-associative: left child can omit equal-precedence + // parentheses, right child needs them to preserve tree shape. + not isLeftChild + +let rec private isAtomicExpr (expr: Expr) : bool = + match expr with + | UnitLiteral + | Int64Literal _ + | Int128Literal _ + | Int8Literal _ + | Int16Literal _ + | Int32Literal _ + | UInt8Literal _ + | UInt16Literal _ + | UInt32Literal _ + | UInt64Literal _ + | UInt128Literal _ + | BoolLiteral _ + | StringLiteral _ + | CharLiteral _ + | FloatLiteral _ + | InterpolatedString _ + | Var _ + | FuncRef _ + | Call _ + | TypeApp _ + | Apply _ + | TupleLiteral _ + | RecordLiteral _ + | ListLiteral _ + | Constructor (_, _, None) -> true + | TupleAccess (tupleExpr, _) -> isAtomicExpr tupleExpr + | RecordAccess (recordExpr, _) -> isAtomicExpr recordExpr + | _ -> false + +let private parenthesizeIfNeeded (expr: Expr) (text: string) : string = + if isAtomicExpr expr then text else $"({text})" + +let private parenthesizeTupleBaseIfNeeded (expr: Expr) (text: string) : string = + match expr with + | TupleAccess _ -> $"({text})" + | _ -> parenthesizeIfNeeded expr text + +let private isSyntheticUnitParam ((paramName, paramType): string * Type) : bool = + paramType = TUnit && paramName.StartsWith("$unit") + +let private isSyntheticUnitParamList (parameters: NonEmptyList) : bool = + match NonEmptyList.toList parameters with + | [singleParam] -> isSyntheticUnitParam singleParam + | _ -> false + +let private isUnitArgumentList (args: NonEmptyList) : bool = + match NonEmptyList.toList args with + | [UnitLiteral] -> true + | _ -> false + +let private tryParseInterpreterLambdaTypeVar (typeVarName: string) : (int * int) option = + let prefix = "__interp_lambda_" + if not (typeVarName.StartsWith prefix) then + None + else + let remainder = typeVarName.Substring(prefix.Length) + let firstSeparator = remainder.IndexOf '_' + if firstSeparator < 0 then + None + else + let secondSeparator = remainder.IndexOf('_', firstSeparator + 1) + if secondSeparator < 0 then + None + else + let seedText = remainder.Substring(0, firstSeparator) + let indexText = + remainder.Substring(firstSeparator + 1, secondSeparator - firstSeparator - 1) + + match System.Int32.TryParse seedText, System.Int32.TryParse indexText with + | (true, seed), (true, paramIndex) -> Some (seed, paramIndex) + | _ -> None + +let private trySingleInterpreterLambdaParamInfo + (parameters: NonEmptyList) + : ((string * Type) * (int * int)) option = + match NonEmptyList.toList parameters with + | [singleParam] -> + let (_, paramType) = singleParam + match paramType with + | TVar typeVarName -> + tryParseInterpreterLambdaTypeVar typeVarName + |> Option.map (fun info -> (singleParam, info)) + | _ -> None + | _ -> None + +let private tryCollectImplicitCurriedLambdaParameters + (parameters: NonEmptyList) + (body: Expr) + : ((string * Type) list * Expr) option = + match trySingleInterpreterLambdaParamInfo parameters with + | None -> None + | Some (firstParam, (seed, startIndex)) -> + let rec collect + (expectedIndex: int) + (collectedRev: (string * Type) list) + (currentExpr: Expr) + : ((string * Type) list * Expr) = + match currentExpr with + | Lambda (nextParameters, nextBody) -> + match trySingleInterpreterLambdaParamInfo nextParameters with + | Some (nextParam, (nextSeed, nextIndex)) + when nextSeed = seed && nextIndex = expectedIndex -> + collect (expectedIndex + 1) (nextParam :: collectedRev) nextBody + | _ -> (List.rev collectedRev, currentExpr) + | _ -> (List.rev collectedRev, currentExpr) + + let (collected, finalBody) = collect (startIndex + 1) [firstParam] body + if List.length collected > 1 then Some (collected, finalBody) else None + +let rec private formatPattern (syntax: Syntax) (pattern: Pattern) : string = + match pattern with + | PUnit -> "()" + | PWildcard -> "_" + | PVar name -> formatIdentifierSegment name + | PConstructor (name, None) -> formatIdentifierPath name + | PConstructor (name, Some payload) -> + let payloadText = formatPattern syntax payload + match syntax with + | CompilerSyntax -> $"{formatIdentifierPath name}({payloadText})" + | InterpreterSyntax -> + if payloadText.StartsWith "(" then + $"{formatIdentifierPath name} {payloadText}" + else + $"{formatIdentifierPath name} {payloadText}" + | PInt64 n -> + match syntax with + | CompilerSyntax -> $"{n}" + | InterpreterSyntax -> $"{n}L" + | PInt128Literal n -> + match syntax with + | CompilerSyntax -> $"{n}Q" + | InterpreterSyntax -> $"{n}Q" + | PInt8Literal n -> + match syntax with + | CompilerSyntax -> $"{n}y" + | InterpreterSyntax -> $"{n}y" + | PInt16Literal n -> + match syntax with + | CompilerSyntax -> $"{n}s" + | InterpreterSyntax -> $"{n}s" + | PInt32Literal n -> + match syntax with + | CompilerSyntax -> $"{n}l" + | InterpreterSyntax -> $"{n}l" + | PUInt8Literal n -> + match syntax with + | CompilerSyntax -> $"{n}uy" + | InterpreterSyntax -> $"{n}uy" + | PUInt16Literal n -> + match syntax with + | CompilerSyntax -> $"{n}us" + | InterpreterSyntax -> $"{n}us" + | PUInt32Literal n -> + match syntax with + | CompilerSyntax -> $"{n}ul" + | InterpreterSyntax -> $"{n}ul" + | PUInt64Literal n -> + match syntax with + | CompilerSyntax -> $"{n}UL" + | InterpreterSyntax -> $"{n}UL" + | PUInt128Literal n -> + match syntax with + | CompilerSyntax -> $"{n}Z" + | InterpreterSyntax -> $"{n}Z" + | PBool b -> if b then "true" else "false" + | PString s -> $"\"{escapeStringContent s}\"" + | PChar c -> $"'{escapeCharContent c}'" + | PFloat f -> formatFloatLiteral f + | PTuple patterns -> + let parts = patterns |> List.map (formatPattern syntax) |> String.concat ", " + $"({parts})" + | PRecord (typeName, fields) -> + let fieldsText = + fields + |> List.map (fun (name, fieldPattern) -> + $"{formatIdentifierSegment name} = {formatPattern syntax fieldPattern}") + |> String.concat ", " + if typeName = "" then + $"{{ {fieldsText} }}" + else + $"{formatIdentifierPath typeName} {{ {fieldsText} }}" + | PList patterns -> + let separator = + match syntax with + | CompilerSyntax -> ", " + | InterpreterSyntax -> "; " + let items = patterns |> List.map (formatPattern syntax) |> String.concat separator + $"[{items}]" + | PListCons (head, tail) -> + let separator = + match syntax with + | CompilerSyntax -> ", " + | InterpreterSyntax -> "; " + let headText = head |> List.map (formatPattern syntax) |> String.concat separator + if headText = "" then + $"[...{formatPattern syntax tail}]" + else + $"[{headText}{separator}...{formatPattern syntax tail}]" + +let rec private formatExpr (syntax: Syntax) (expr: Expr) : string = + let isNegativeNumericLiteral (arg: Expr) : bool = + match arg with + | Int64Literal n -> n < 0L + | Int128Literal n -> n < System.Int128.Zero + | Int8Literal n -> n < 0y + | Int16Literal n -> n < 0s + | Int32Literal n -> n < 0l + | FloatLiteral f -> + // Keep -0.0 wrapped as well; it is lexically ambiguous in application position. + System.BitConverter.DoubleToInt64Bits(f) < 0L + | _ -> false + + let formatAppArg (arg: Expr) : string = + let argText = formatExpr syntax arg + match syntax with + | CompilerSyntax -> + parenthesizeIfNeeded arg argText + | InterpreterSyntax -> + match arg with + | _ when isNegativeNumericLiteral arg -> $"({argText})" + | Constructor (_, _, None) -> $"({argText})" + | TupleLiteral _ -> $"({argText})" + | Call _ + | TypeApp _ + | Apply _ -> $"({argText})" + | _ -> parenthesizeIfNeeded arg argText + + let rec formatInterpreterAppArgs (args: Expr list) : string list = + match args with + | [] -> [] + | [lastArg] -> [formatAppArg lastArg] + | currentArg :: ((UnitLiteral as nextArg) :: restArgs) -> + // `f x ()` is ambiguous with zero-arg calls (`x()`). + // Parenthesize the preceding argument to preserve argument boundaries. + $"({formatAppArg currentArg})" + :: (formatInterpreterAppArgs (nextArg :: restArgs)) + | currentArg :: ((TupleLiteral _ as nextArg) :: restArgs) -> + // `f g (a, b)` can be reparsed as applying `g` to tuple elements. + // Parenthesize the preceding argument to keep tuple as a separate argument. + $"({formatAppArg currentArg})" + :: (formatInterpreterAppArgs (nextArg :: restArgs)) + | currentArg :: restArgs -> + formatAppArg currentArg :: formatInterpreterAppArgs restArgs + + match expr with + | UnitLiteral -> "()" + | Int64Literal n -> + match syntax with + | CompilerSyntax -> $"{n}" + | InterpreterSyntax -> $"{n}L" + | Int128Literal n -> + match syntax with + | CompilerSyntax -> $"{n}Q" + | InterpreterSyntax -> $"{n}Q" + | Int8Literal n -> + match syntax with + | CompilerSyntax -> $"{n}y" + | InterpreterSyntax -> $"{n}y" + | Int16Literal n -> + match syntax with + | CompilerSyntax -> $"{n}s" + | InterpreterSyntax -> $"{n}s" + | Int32Literal n -> + match syntax with + | CompilerSyntax -> $"{n}l" + | InterpreterSyntax -> $"{n}l" + | UInt8Literal n -> + match syntax with + | CompilerSyntax -> $"{n}uy" + | InterpreterSyntax -> $"{n}uy" + | UInt16Literal n -> + match syntax with + | CompilerSyntax -> $"{n}us" + | InterpreterSyntax -> $"{n}us" + | UInt32Literal n -> + match syntax with + | CompilerSyntax -> $"{n}ul" + | InterpreterSyntax -> $"{n}ul" + | UInt64Literal n -> + match syntax with + | CompilerSyntax -> $"{n}UL" + | InterpreterSyntax -> $"{n}UL" + | UInt128Literal n -> + match syntax with + | CompilerSyntax -> $"{n}Z" + | InterpreterSyntax -> $"{n}Z" + | BoolLiteral b -> if b then "true" else "false" + | StringLiteral s -> $"\"{escapeStringContent s}\"" + | CharLiteral c -> $"'{escapeCharContent c}'" + | FloatLiteral f -> formatFloatLiteral f + | InterpolatedString parts -> + let partsText = + parts + |> List.map (function + | StringText t -> escapeStringContent t + | StringExpr e -> $"{{{formatExpr syntax e}}}") + |> String.concat "" + $"$\"{partsText}\"" + | BinOp (op, left, right) -> + let formatChild (isLeftChild: bool) (child: Expr) : string = + let childText = formatExpr syntax child + match child with + | BinOp (childOp, _, _) -> + if shouldParenthesizeBinChild op isLeftChild childOp then + $"({childText})" + else + childText + | _ -> parenthesizeIfNeeded child childText + let leftCanConsumeNegativeNumericArg (expr: Expr) : bool = + match expr with + | Var funcName when funcName.Contains "." -> true + | Call _ + | TypeApp _ + | Apply _ + | Constructor (_, _, None) -> true + | _ -> false + let isNumericLiteralExpr (expr: Expr) : bool = + match expr with + | Int64Literal _ + | Int128Literal _ + | Int8Literal _ + | Int16Literal _ + | Int32Literal _ + | UInt8Literal _ + | UInt16Literal _ + | UInt32Literal _ + | UInt64Literal _ + | UInt128Literal _ + | FloatLiteral _ -> true + | _ -> false + let leftText = formatChild true left + let rightTextBase = formatChild false right + let rightText = + match syntax, op with + | InterpreterSyntax, Sub when leftCanConsumeNegativeNumericArg left && isNumericLiteralExpr right -> + $"({rightTextBase})" + | _ -> rightTextBase + $"{leftText} {formatBinOp op} {rightText}" + | UnaryOp (op, inner) -> + let innerText = parenthesizeIfNeeded inner (formatExpr syntax inner) + $"{formatUnaryOp op}{innerText}" + | Let (name, value, body) -> + $"let {formatIdentifierSegment name} = {formatExpr syntax value} in {formatExpr syntax body}" + | Var name -> formatIdentifierPath name + | If (cond, thenBranch, elseBranch) -> + $"if {formatExpr syntax cond} then {formatExpr syntax thenBranch} else {formatExpr syntax elseBranch}" + | Call (funcName, args) -> + let argsList = NonEmptyList.toList args + let formattedName = formatIdentifierPath funcName + match syntax with + | CompilerSyntax -> + if isUnitArgumentList args then + $"{formattedName}()" + else + let argsText = argsList |> List.map (formatExpr syntax) |> String.concat ", " + $"{formattedName}({argsText})" + | InterpreterSyntax -> + if isUnitArgumentList args then + $"{formattedName}()" + else + let argsText = argsList |> formatInterpreterAppArgs |> String.concat " " + $"{formattedName} {argsText}" + | TypeApp (funcName, typeArgs, args) -> + let argsList = NonEmptyList.toList args + let typeArgsText = typeArgs |> List.map formatType |> String.concat ", " + let formattedName = formatIdentifierPath funcName + match syntax with + | CompilerSyntax -> + if isUnitArgumentList args then + $"{formattedName}<{typeArgsText}>()" + else + let argsText = argsList |> List.map (formatExpr syntax) |> String.concat ", " + $"{formattedName}<{typeArgsText}>({argsText})" + | InterpreterSyntax -> + let head = $"{formattedName}<{typeArgsText}>" + if isUnitArgumentList args then + $"{head}()" + else + let argsText = argsList |> List.map (formatExpr syntax) |> String.concat ", " + $"{head}({argsText})" + | TupleLiteral elements -> + let elementsText = elements |> List.map (formatExpr syntax) |> String.concat ", " + $"({elementsText})" + | TupleAccess (tupleExpr, index) -> + let tupleBaseText = formatExpr syntax tupleExpr + let tupleText = + match syntax, tupleExpr with + | InterpreterSyntax, (Call _ | TypeApp _ | Apply _) -> + // In interpreter syntax, call application has no mandatory wrapping. + // Parenthesize before postfix access so `.0` binds to the call result. + $"({tupleBaseText})" + | _ -> + parenthesizeTupleBaseIfNeeded tupleExpr tupleBaseText + $"{tupleText}.{index}" + | RecordLiteral (typeName, fields) -> + let fieldsText = + fields + |> List.map (fun (name, value) -> + $"{formatIdentifierSegment name} = {formatExpr syntax value}") + |> String.concat ", " + if typeName = "" then + $"{{ {fieldsText} }}" + else + $"{formatIdentifierPath typeName} {{ {fieldsText} }}" + | RecordUpdate (recordExpr, updates) -> + let recordText = formatExpr syntax recordExpr + let updatesText = + updates + |> List.map (fun (name, value) -> + $"{formatIdentifierSegment name} = {formatExpr syntax value}") + |> String.concat ", " + $"{{ {recordText} with {updatesText} }}" + | RecordAccess (recordExpr, fieldName) -> + let recordBaseText = formatExpr syntax recordExpr + let recordText = + match syntax, recordExpr with + | InterpreterSyntax, (Call _ | TypeApp _ | Apply _) -> + // Same ambiguity as tuple access: ensure `.field` applies to call result. + $"({recordBaseText})" + | _ -> + parenthesizeIfNeeded recordExpr recordBaseText + $"{recordText}.{formatIdentifierSegment fieldName}" + | Constructor (typeName, variantName, payload) -> + let fullName = + let formattedVariantName = formatIdentifierSegment variantName + if typeName = "" then + formattedVariantName + else + $"{formatIdentifierPath typeName}.{formattedVariantName}" + match payload with + | None -> fullName + | Some payloadExpr -> + let payloadText = formatAppArg payloadExpr + match syntax with + | CompilerSyntax -> $"{fullName}({formatExpr syntax payloadExpr})" + | InterpreterSyntax -> $"{fullName} {payloadText}" + | Match (scrutinee, cases) -> + let scrutineeText = formatExpr syntax scrutinee + let formatCaseBody (body: Expr) : string = + let bodyText = formatExpr syntax body + match body with + // Without parens, nested match case bars get parsed as outer cases. + | Match _ + | Let _ -> $"({bodyText})" + | _ -> bodyText + let caseText = + cases + |> List.map (fun case -> + let patternsText = + case.Patterns + |> NonEmptyList.toList + |> List.map (formatPattern syntax) + |> String.concat " | " + let guardText = + match case.Guard with + | None -> "" + | Some guardExpr -> $" when {formatExpr syntax guardExpr}" + $"| {patternsText}{guardText} -> {formatCaseBody case.Body}") + |> String.concat " " + $"match {scrutineeText} with {caseText}" + | ListLiteral elements -> + let separator = + match syntax with + | CompilerSyntax -> ", " + | InterpreterSyntax -> "; " + let elementsText = elements |> List.map (formatExpr syntax) |> String.concat separator + $"[{elementsText}]" + | ListCons (head, tail) -> + let separator = + match syntax with + | CompilerSyntax -> ", " + | InterpreterSyntax -> "; " + let headText = head |> List.map (formatExpr syntax) |> String.concat separator + if headText = "" then + $"[...{formatExpr syntax tail}]" + else + $"[{headText}{separator}...{formatExpr syntax tail}]" + | Lambda (parameters, body) -> + let parameterList = NonEmptyList.toList parameters + match syntax with + | CompilerSyntax -> + match parameterList, body with + | [ (paramName, TBool) ], BinOp (And, Var varName, rightArg) when paramName = "$pipe_arg" && varName = "$pipe_arg" -> + $"(&&) {formatAppArg rightArg}" + | [ (paramName, TBool) ], BinOp (Or, Var varName, rightArg) when paramName = "$pipe_arg" && varName = "$pipe_arg" -> + $"(||) {formatAppArg rightArg}" + | _ -> + if isSyntheticUnitParamList parameters then + $"() => {formatExpr syntax body}" + else + let paramsText = + parameterList + |> List.map (fun (name, typ) -> + $"{formatIdentifierSegment name}: {formatType typ}") + |> String.concat ", " + $"({paramsText}) => {formatExpr syntax body}" + | InterpreterSyntax -> + if isSyntheticUnitParamList parameters then + $"fun () -> {formatExpr syntax body}" + else + match parameterList, body with + | [ (paramName, TBool) ], BinOp (And, Var varName, rightArg) when paramName = "$pipe_arg" && varName = "$pipe_arg" -> + $"(&&) {formatAppArg rightArg}" + | [ (paramName, TBool) ], BinOp (Or, Var varName, rightArg) when paramName = "$pipe_arg" && varName = "$pipe_arg" -> + $"(||) {formatAppArg rightArg}" + | _ -> + let parametersToFormat, bodyToFormat = + match tryCollectImplicitCurriedLambdaParameters parameters body with + | Some flattened -> flattened + | None -> (parameterList, body) + + let paramsText = + parametersToFormat + |> List.map (fun (name, typ) -> + match typ with + | TVar typeVar -> + match tryParseInterpreterLambdaTypeVar typeVar with + | Some _ -> formatIdentifierSegment name + | None -> + $"({formatIdentifierSegment name}: {formatType typ})" + | _ -> + $"({formatIdentifierSegment name}: {formatType typ})") + |> String.concat " " + $"fun {paramsText} -> {formatExpr syntax bodyToFormat}" + | Apply (funcExpr, args) -> + let argsList = NonEmptyList.toList args + match syntax with + | CompilerSyntax -> + let funcText = + match funcExpr with + // Preserve Apply-vs-Constructor distinction for compiler parser + // (`Constructor(arg)` parses as constructor payload, not Apply). + | Constructor (_, _, None) -> $"({formatExpr syntax funcExpr})" + | _ -> parenthesizeIfNeeded funcExpr (formatExpr syntax funcExpr) + if isUnitArgumentList args then + $"{funcText}()" + else + let argsText = argsList |> List.map (formatExpr syntax) |> String.concat ", " + $"{funcText}({argsText})" + | InterpreterSyntax -> + match funcExpr, argsList with + // Preserve Apply-vs-Constructor distinction for interpreter parser + // by printing constructor application in pipe form. + | Constructor (_, _, None), [singleArg] -> + $"{formatExpr syntax singleArg} |> {formatExpr syntax funcExpr}" + | TupleLiteral _, _ -> + let funcText = formatExpr syntax funcExpr + if isUnitArgumentList args then + $"{funcText}()" + elif List.length argsList > 1 then + // Tuple-callee apply is only parseable in interpreter syntax + // via parenthesized call-arg form: (tupleExpr)(a, b). + let argsText = argsList |> List.map (formatExpr syntax) |> String.concat ", " + $"{funcText}({argsText})" + else + let argsText = argsList |> formatInterpreterAppArgs |> String.concat " " + $"{funcText} {argsText}" + | Lambda _, _ when List.length argsList > 1 -> + // Preserve uncurried multi-arg lambda-apply shape. + let funcText = parenthesizeIfNeeded funcExpr (formatExpr syntax funcExpr) + let argsText = argsList |> List.map (formatExpr syntax) |> String.concat ", " + $"{funcText}({argsText})" + | Apply _, _ when List.length argsList > 1 -> + // Preserve grouped argument shape for nested apply chains that + // originated from parenthesized multi-arg application. + let funcText = formatExpr syntax funcExpr + let argsText = argsList |> List.map (formatExpr syntax) |> String.concat ", " + $"{funcText}({argsText})" + | _ -> + let funcText = parenthesizeIfNeeded funcExpr (formatExpr syntax funcExpr) + if isUnitArgumentList args then + $"{funcText}()" + else + let argsText = argsList |> formatInterpreterAppArgs |> String.concat " " + $"{funcText} {argsText}" + | FuncRef funcName -> formatIdentifierPath funcName + | Closure (funcName, captures) -> + let capturesText = captures |> List.map (formatExpr syntax) |> String.concat ", " + $"Closure({formatIdentifierPath funcName}, [{capturesText}])" + +let private formatFunctionDef (syntax: Syntax) (funcDef: FunctionDef) : string = + match syntax with + | CompilerSyntax -> + let typeParamsText = + if List.isEmpty funcDef.TypeParams then "" + else + let joined = String.concat ", " funcDef.TypeParams + $"<{joined}>" + let paramsText = + funcDef.Params + |> NonEmptyList.toList + |> (fun parameters -> + if isSyntheticUnitParamList funcDef.Params then + "" + else + parameters + |> List.map (fun (name, typ) -> $"{name}: {formatType typ}") + |> String.concat ", ") + $"def {formatIdentifierSegment funcDef.Name}{typeParamsText}({paramsText}) : {formatType funcDef.ReturnType} = {formatExpr syntax funcDef.Body}" + | InterpreterSyntax -> + let typeParamsText = + if List.isEmpty funcDef.TypeParams then "" + else + let joined = String.concat ", " funcDef.TypeParams + $"<{joined}>" + let paramsText = + funcDef.Params + |> NonEmptyList.toList + |> (fun parameters -> + if isSyntheticUnitParamList funcDef.Params then + "" + else + parameters + |> List.map (fun (name, typ) -> $"{name}: {formatType typ}") + |> String.concat ", ") + $"let {formatIdentifierSegment funcDef.Name}{typeParamsText}({paramsText}) : {formatType funcDef.ReturnType} = {formatExpr syntax funcDef.Body}" + +let private formatTypeDef (typeDef: TypeDef) : string = + let formatTypeParams (typeParams: string list) : string = + if List.isEmpty typeParams then "" + else + let joined = String.concat ", " typeParams + $"<{joined}>" + + match typeDef with + | RecordDef (name, typeParams, fields) -> + let fieldsText = + fields + |> List.map (fun (fieldName, fieldType) -> + $"{formatIdentifierSegment fieldName}: {formatType fieldType}") + |> String.concat ", " + $"type {formatIdentifierSegment name}{formatTypeParams typeParams} = {{ {fieldsText} }}" + | SumTypeDef (name, typeParams, variants) -> + let variantsText = + variants + |> List.map (fun variant -> + match variant.Payload with + | None -> formatIdentifierSegment variant.Name + | Some payloadType -> + $"{formatIdentifierSegment variant.Name} of {formatType payloadType}") + |> String.concat " | " + $"type {formatIdentifierSegment name}{formatTypeParams typeParams} = {variantsText}" + | TypeAlias (name, typeParams, targetType) -> + $"type {formatIdentifierSegment name}{formatTypeParams typeParams} = {formatType targetType}" + +let private formatTopLevel (syntax: Syntax) (topLevel: TopLevel) : string = + match topLevel with + | FunctionDef funcDef -> formatFunctionDef syntax funcDef + | TypeDef typeDef -> formatTypeDef typeDef + | Expression expr -> formatExpr syntax expr + +let formatProgram (syntax: Syntax) (Program items: Program) : string = + let separator = + match syntax with + | CompilerSyntax -> "\n" + | InterpreterSyntax -> "\n;\n" + items |> List.map (formatTopLevel syntax) |> String.concat separator diff --git a/backend/src/LibCompiler/Binary.fs b/backend/src/LibCompiler/Binary.fs new file mode 100644 index 0000000000..0d8422e8e3 --- /dev/null +++ b/backend/src/LibCompiler/Binary.fs @@ -0,0 +1,193 @@ +// Binary.fs - Mach-O Binary Format Types +// +// Defines data structures for the Mach-O binary format used by macOS. +// +// Mach-O is the executable format for macOS. This module defines the types +// needed to represent Mach-O headers, load commands, segments, and sections. +// +// Structure of a Mach-O executable: +// - Mach-O Header: Identifies the file type and architecture +// - Load Commands: Instructions for the loader (segments, entry point, etc.) +// - Data: The actual code and data sections +// +// Our minimal executable has: +// - __PAGEZERO segment (4GB unmapped memory for security) +// - __TEXT segment with __text section (executable code) +// - LC_MAIN command (specifies entry point) + +module Binary + +/// Mach-O magic number for 64-bit +let MH_MAGIC_64 = 0xFEEDFACFu + +/// CPU type constants +let CPU_TYPE_ARM64 = 0x0100000Cu +let CPU_SUBTYPE_ARM64_ALL = 0u + +/// File type constants +let MH_EXECUTE = 0x2u // Executable file + +/// Flags +let MH_NOUNDEFS = 0x1u +let MH_DYLDLINK = 0x4u +let MH_TWOLEVEL = 0x80u +let MH_PIE = 0x200000u + +/// Load command types +let LC_SEGMENT_64 = 0x19u +let LC_MAIN = 0x80000028u +let LC_LOAD_DYLINKER = 0xEu +let LC_LOAD_DYLIB = 0xCu +let LC_UUID = 0x1Bu +let LC_BUILD_VERSION = 0x32u +let LC_SYMTAB = 0x2u +let LC_DYSYMTAB = 0xBu + +/// Virtual memory protections +let VM_PROT_READ = 0x1u +let VM_PROT_WRITE = 0x2u +let VM_PROT_EXECUTE = 0x4u + +/// Section flags +let S_REGULAR = 0x0u +let S_ATTR_PURE_INSTRUCTIONS = 0x80000000u +let S_ATTR_SOME_INSTRUCTIONS = 0x00000400u + +/// Mach-O header +type MachHeader = { + Magic: uint32 + CpuType: uint32 + CpuSubType: uint32 + FileType: uint32 + NumCommands: uint32 + SizeOfCommands: uint32 + Flags: uint32 + Reserved: uint32 // For 64-bit +} + +/// Section within a segment +type Section64 = { + SectionName: string // Max 16 bytes + SegmentName: string // Max 16 bytes + Address: uint64 + Size: uint64 + Offset: uint32 + Align: uint32 + RelocationOffset: uint32 + NumRelocations: uint32 + Flags: uint32 + Reserved1: uint32 + Reserved2: uint32 + Reserved3: uint32 +} + +/// LC_SEGMENT_64 load command +type SegmentCommand64 = { + Command: uint32 + CommandSize: uint32 + SegmentName: string // Max 16 bytes + VmAddress: uint64 + VmSize: uint64 + FileOffset: uint64 + FileSize: uint64 + MaxProt: uint32 + InitProt: uint32 + NumSections: uint32 + Flags: uint32 + Sections: Section64 list +} + +/// LC_MAIN load command (entry point) +type MainCommand = { + Command: uint32 + CommandSize: uint32 + EntryOffset: uint64 + StackSize: uint64 +} + +/// LC_LOAD_DYLINKER load command +type DylinkerCommand = { + Command: uint32 + CommandSize: uint32 + Name: string // Path to dylinker (e.g., "/usr/lib/dyld") +} + +/// LC_LOAD_DYLIB load command +type DylibCommand = { + Command: uint32 + CommandSize: uint32 + Name: string // Path to library (e.g., "/usr/lib/libSystem.B.dylib") + Timestamp: uint32 + CurrentVersion: uint32 + CompatibilityVersion: uint32 +} + +/// LC_UUID load command +type UuidCommand = { + Command: uint32 + CommandSize: uint32 + Uuid: byte array // 16 bytes +} + +/// LC_BUILD_VERSION load command +type BuildVersionCommand = { + Command: uint32 + CommandSize: uint32 + Platform: uint32 // 1 = macOS + MinOS: uint32 // Minimum OS version (e.g., 11.0 = 0xB0000) + Sdk: uint32 // SDK version + NumTools: uint32 // Number of tool entries (0 for simplicity) +} + +/// LC_SYMTAB load command +type SymtabCommand = { + Command: uint32 + CommandSize: uint32 + SymbolTableOffset: uint32 + NumSymbols: uint32 + StringTableOffset: uint32 + StringTableSize: uint32 +} + +/// LC_DYSYMTAB load command +type DysymtabCommand = { + Command: uint32 + CommandSize: uint32 + // Simplified - just the basic fields + LocalSymIndex: uint32 + NumLocalSymbols: uint32 + ExtDefSymIndex: uint32 + NumExtDefSymbols: uint32 + UndefSymIndex: uint32 + NumUndefSymbols: uint32 + // Zero out the rest + TocOffset: uint32 + NumTocEntries: uint32 + ModTableOffset: uint32 + NumModTableEntries: uint32 + ExtRefSymOffset: uint32 + NumExtRefSyms: uint32 + IndirectSymOffset: uint32 + NumIndirectSyms: uint32 + ExtRelOffset: uint32 + NumExtRel: uint32 + LocRelOffset: uint32 + NumLocRel: uint32 +} + +/// Complete Mach-O binary structure +type MachOBinary = { + Header: MachHeader + PageZeroCommand: SegmentCommand64 + TextSegmentCommand: SegmentCommand64 + LinkeditSegmentCommand: SegmentCommand64 + DylinkerCommand: DylinkerCommand + DylibCommand: DylibCommand + SymtabCommand: SymtabCommand + DysymtabCommand: DysymtabCommand + UuidCommand: UuidCommand + BuildVersionCommand: BuildVersionCommand + MainCommand: MainCommand + MachineCode: byte array + StringData: byte array // Constant string data (placed after code) +} diff --git a/backend/src/LibCompiler/Binary_ELF.fs b/backend/src/LibCompiler/Binary_ELF.fs new file mode 100644 index 0000000000..27ca16ad23 --- /dev/null +++ b/backend/src/LibCompiler/Binary_ELF.fs @@ -0,0 +1,90 @@ +// Binary_ELF.fs - ELF Binary Format Types +// +// Defines data structures for the ELF (Executable and Linkable Format) +// used by Linux and other Unix-like systems. +// +// ELF is the standard executable format for Linux. This module defines +// the types needed to represent ELF headers, program headers, and segments. +// +// Structure of an ELF executable: +// - ELF Header: Identifies the file type, architecture, and entry point +// - Program Headers: Describe segments to load into memory +// - Data: The actual code and data +// +// Our minimal executable has: +// - ELF64 header for ARM64 +// - One PT_LOAD program header (executable code segment) +// - The machine code + +module Binary_ELF + +/// ELF magic number (0x7F 'E' 'L' 'F') +let EI_MAG0 = 0x7Fuy +let EI_MAG1 = byte 'E' +let EI_MAG2 = byte 'L' +let EI_MAG3 = byte 'F' + +/// ELF class (32 or 64 bit) +let ELFCLASS64 = 2uy + +/// ELF data encoding (endianness) +let ELFDATA2LSB = 1uy // Little-endian + +/// ELF version +let EV_CURRENT = 1uy + +/// OS/ABI identification +let ELFOSABI_NONE = 0uy // System V + +/// Object file type +let ET_EXEC = 2us // Executable file + +/// Machine architecture +let EM_AARCH64 = 183us // ARM 64-bit +let EM_X86_64 = 62us // AMD x86-64 + +/// Program header type +let PT_LOAD = 1u // Loadable segment + +/// Program header flags +let PF_X = 1u // Execute +let PF_W = 2u // Write +let PF_R = 4u // Read + +/// ELF64 Header (64 bytes) +type Elf64Header = { + Ident: byte array // 16 bytes: ELF identification + Type: uint16 // Object file type (ET_EXEC) + Machine: uint16 // Architecture (EM_AARCH64) + Version: uint32 // ELF version + Entry: uint64 // Entry point virtual address + PhOff: uint64 // Program header table file offset + ShOff: uint64 // Section header table file offset (0 = none) + Flags: uint32 // Processor-specific flags + EhSize: uint16 // ELF header size + PhEntSize: uint16 // Program header entry size + PhNum: uint16 // Number of program header entries + ShEntSize: uint16 // Section header entry size + ShNum: uint16 // Number of section header entries + ShStrNdx: uint16 // Section header string table index +} + +/// ELF64 Program Header (56 bytes) +type Elf64ProgramHeader = { + Type: uint32 // Segment type (PT_LOAD) + Flags: uint32 // Segment flags (PF_R | PF_X) + Offset: uint64 // Segment file offset + VAddr: uint64 // Segment virtual address + PAddr: uint64 // Segment physical address (same as VAddr) + FileSize: uint64 // Segment size in file + MemSize: uint64 // Segment size in memory + Align: uint64 // Segment alignment +} + +/// Complete ELF binary structure +type ElfBinary = { + Header: Elf64Header + ProgramHeaders: Elf64ProgramHeader list + MachineCode: byte array + StringData: byte array // Constant string data (placed after code) +} diff --git a/backend/src/LibCompiler/Bitset.fs b/backend/src/LibCompiler/Bitset.fs new file mode 100644 index 0000000000..a606714620 --- /dev/null +++ b/backend/src/LibCompiler/Bitset.fs @@ -0,0 +1,162 @@ +// Bitset.fs - Low-level bitset utilities for compiler passes +// +// Provides allocation-friendly bitset operations used by register allocation +// and dominance analysis. The representation is a raw uint64 array. + +module Bitset + +type Bitset = uint64 array + +let wordCount (bitCount: int) : int = + (bitCount + 63) / 64 + +let empty (wordCount: int) : Bitset = + Array.zeroCreate wordCount + +let all (bitCount: int) : Bitset = + let wordCount = wordCount bitCount + if wordCount = 0 then + [||] + else + let extraBits = bitCount % 64 + let lastMask = + if extraBits = 0 then System.UInt64.MaxValue + else (1UL <<< extraBits) - 1UL + Array.init wordCount (fun i -> + if i = wordCount - 1 then lastMask else System.UInt64.MaxValue) + +let singleton (wordCount: int) (idx: int) : Bitset = + if wordCount = 0 then + [||] + else + let word = idx >>> 6 + let bit = 1UL <<< (idx &&& 63) + Array.init wordCount (fun i -> + if i = word then bit else 0UL) + +let clone (bits: Bitset) : Bitset = + Array.copy bits + +let isEmpty (bits: Bitset) : bool = + bits |> Array.forall (fun word -> word = 0UL) + +let equal (left: Bitset) (right: Bitset) : bool = + if left.Length <> right.Length then + Crash.crash "Bitset equality requires matching word counts" + else + Array.forall2 (=) left right + +let union (left: Bitset) (right: Bitset) : Bitset = + if left.Length <> right.Length then + Crash.crash "Bitset union requires matching word counts" + else if isEmpty left then + right + else if isEmpty right then + left + else + Array.init left.Length (fun i -> left.[i] ||| right.[i]) + +let diff (left: Bitset) (right: Bitset) : Bitset = + if left.Length <> right.Length then + Crash.crash "Bitset difference requires matching word counts" + else if isEmpty right then + left + else + Array.init left.Length (fun i -> left.[i] &&& (~~~right.[i])) + +let intersectMany (first: Bitset) (rest: Bitset list) : Bitset = + let wordCount = first.Length + Array.init wordCount (fun i -> + rest |> List.fold (fun acc set -> acc &&& set.[i]) first.[i]) + +let containsIndex (idx: int) (bits: Bitset) : bool = + let wordIdx = idx >>> 6 + let bitIdx = idx &&& 63 + if wordIdx < bits.Length then + (bits.[wordIdx] &&& (1UL <<< bitIdx)) <> 0UL + else + false + +let addIndexInPlace (idx: int) (bits: Bitset) : unit = + let wordIdx = idx >>> 6 + let bitIdx = idx &&& 63 + if wordIdx < bits.Length then + bits.[wordIdx] <- bits.[wordIdx] ||| (1UL <<< bitIdx) + +let add (idx: int) (bits: Bitset) : Bitset = + if bits.Length = 0 then + bits + else + let updated = Array.copy bits + addIndexInPlace idx updated + updated + +let removeIndexInPlace (idx: int) (bits: Bitset) : unit = + let wordIdx = idx >>> 6 + let bitIdx = idx &&& 63 + if wordIdx < bits.Length then + bits.[wordIdx] <- bits.[wordIdx] &&& (~~~(1UL <<< bitIdx)) + +let unionInPlace (left: Bitset) (right: Bitset) : unit = + if left.Length <> right.Length then + Crash.crash "Bitset union requires matching word counts" + else + for i in 0 .. left.Length - 1 do + left.[i] <- left.[i] ||| right.[i] + +let intersectInPlace (left: Bitset) (right: Bitset) : unit = + if left.Length <> right.Length then + Crash.crash "Bitset intersection requires matching word counts" + else + for i in 0 .. left.Length - 1 do + left.[i] <- left.[i] &&& right.[i] + +let diffInPlace (left: Bitset) (right: Bitset) : unit = + if left.Length <> right.Length then + Crash.crash "Bitset difference requires matching word counts" + else + for i in 0 .. left.Length - 1 do + left.[i] <- left.[i] &&& (~~~right.[i]) + +let intersects (left: Bitset) (right: Bitset) : bool = + if left.Length <> right.Length then + Crash.crash "Bitset intersection requires matching word counts" + else + let mutable found = false + let mutable i = 0 + while not found && i < left.Length do + if (left.[i] &&& right.[i]) <> 0UL then + found <- true + i <- i + 1 + found + +let private countTrailingZeros (word: uint64) : int = + let mutable temp = word + let mutable count = 0 + while (temp &&& 1UL) = 0UL do + temp <- temp >>> 1 + count <- count + 1 + count + +let iterIndices (bits: Bitset) (f: int -> unit) : unit = + for wordIdx in 0 .. bits.Length - 1 do + let mutable word = bits.[wordIdx] + let baseIdx = wordIdx * 64 + while word <> 0UL do + let tz = countTrailingZeros word + f (baseIdx + tz) + word <- word &&& (word - 1UL) + +let count (bits: Bitset) : int = + let mutable total = 0 + for word in bits do + let mutable w = word + while w <> 0UL do + w <- w &&& (w - 1UL) + total <- total + 1 + total + +let indicesToList (bits: Bitset) : int list = + let mutable acc = [] + iterIndices bits (fun idx -> acc <- idx :: acc) + List.rev acc diff --git a/backend/src/LibCompiler/CompilerLibrary.fs b/backend/src/LibCompiler/CompilerLibrary.fs new file mode 100644 index 0000000000..87b991e3c7 --- /dev/null +++ b/backend/src/LibCompiler/CompilerLibrary.fs @@ -0,0 +1,1882 @@ +// CompilerLibrary.fs - Library API for the Dark compiler +// +// Exposes the compiler as a library for use in tests and other tools. +// Provides clean functions that can be called without spawning processes. + +module CompilerLibrary + +open CodeGen +open IRPrinter + +open System +open System.IO +open System.Diagnostics +open System.Reflection +open Output + +/// Timing for a single compiler pass +type PassTiming = { + Pass: string + Elapsed: TimeSpan +} + +/// Recorder for compiler pass timings +type PassTimingRecorder = PassTiming -> unit + +/// Result of execution with timing +type ExecutionOutput = { + ExitCode: int + Stdout: string + Stderr: string + RuntimeTime: TimeSpan +} + +/// Compilation mode for labeling and test behavior +type CompileMode = + | FullProgram + | TestExpression + +/// Source syntax for parsing Dark programs +type SourceSyntax = + | CompilerSyntax + | InterpreterSyntax + +/// Shared compiler warning settings. +let defaultWarningSettings : AST.WarningSettings = AST.defaultWarningSettings + +/// Result of compilation with timing +type CompileReport = { + Result: Result + CompileTime: TimeSpan +} + +/// Compiler options for controlling optimization behavior +type CompilerOptions = { + /// Disable free list memory reuse (always bump allocate) + DisableFreeList: bool + /// Disable ANF-level optimizations (constant folding, propagation, etc.) + DisableANFOpt: bool + /// Disable ANF constant folding (includes algebraic identities and constant branches) + DisableANFConstFolding: bool + /// Disable ANF constant propagation + DisableANFConstProp: bool + /// Disable ANF copy propagation + DisableANFCopyProp: bool + /// Disable ANF dead code elimination + DisableANFDCE: bool + /// Disable ANF strength reduction (pow2 mul/div/mod) + DisableANFStrengthReduction: bool + /// Disable ANF function inlining + DisableInlining: bool + /// Disable tail call optimization + DisableTCO: bool + /// Disable MIR-level optimizations (DCE, copy/constant propagation on SSA) + DisableMIROpt: bool + /// Disable MIR constant folding + DisableMIRConstFolding: bool + /// Disable MIR common subexpression elimination + DisableMIRCSE: bool + /// Disable MIR copy propagation + DisableMIRCopyProp: bool + /// Disable MIR dead code elimination + DisableMIRDCE: bool + /// Disable MIR CFG simplification + DisableMIRCFGSimplify: bool + /// Disable MIR loop-invariant code motion + DisableMIRLICM: bool + /// Disable LIR-level optimizations (peephole optimizations) + DisableLIROpt: bool + /// Disable LIR peephole optimizations + DisableLIRPeephole: bool + /// Disable function tree shaking (pruning unused stdlib/user functions) + DisableFunctionTreeShaking: bool + /// Enable runtime expression coverage tracking + EnableCoverage: bool + /// Enable leak checking (debug only) + EnableLeakCheck: bool + /// Warning compatibility settings passed into type checking + Warnings: AST.WarningSettings + /// Dump ANF representations to stdout + DumpANF: bool + /// Dump MIR representations to stdout + DumpMIR: bool + /// Dump LIR representations to stdout (before and after register allocation) + DumpLIR: bool +} + +/// Default compiler options +let defaultOptions : CompilerOptions = { + DisableFreeList = false + DisableANFOpt = false + DisableANFConstFolding = false + DisableANFConstProp = false + DisableANFCopyProp = false + DisableANFDCE = false + DisableANFStrengthReduction = false + DisableInlining = false + DisableTCO = false + DisableMIROpt = false + DisableMIRConstFolding = false + DisableMIRCSE = false + DisableMIRCopyProp = false + DisableMIRDCE = false + DisableMIRCFGSimplify = false + DisableMIRLICM = false + DisableLIROpt = false + DisableLIRPeephole = false + DisableFunctionTreeShaking = false + EnableCoverage = false + EnableLeakCheck = false + Warnings = AST.defaultWarningSettings + DumpANF = false + DumpMIR = false + DumpLIR = false +} + +let private recordPassTiming + (recorder: PassTimingRecorder option) + (pass: string) + (elapsedMs: float) + : unit = + match recorder with + | None -> () + | Some record -> + record { Pass = pass; Elapsed = TimeSpan.FromMilliseconds(elapsedMs) } + +/// Determine whether to dump a specific IR, based on verbosity or explicit option +let private shouldDumpIR (verbosity: int) (enabled: bool) : bool = + verbosity >= 3 || enabled + +let private buildANFOptimizeOptions (options: CompilerOptions) : ANF_Optimize.OptimizeOptions = + let enabled = not options.DisableANFOpt + { + EnableConstFolding = enabled && not options.DisableANFConstFolding + EnableConstProp = enabled && not options.DisableANFConstProp + EnableCopyProp = enabled && not options.DisableANFCopyProp + EnableDCE = enabled && not options.DisableANFDCE + EnableStrengthReduction = enabled && not options.DisableANFStrengthReduction + } + +let private shouldRunANFOptimize (anfOptions: ANF_Optimize.OptimizeOptions) : bool = + anfOptions.EnableConstFolding + || anfOptions.EnableConstProp + || anfOptions.EnableCopyProp + || anfOptions.EnableDCE + || anfOptions.EnableStrengthReduction + +let private buildMIROptimizeOptions (options: CompilerOptions) : MIR_Optimize.OptimizeOptions = + let enabled = not options.DisableMIROpt + { + EnableConstFolding = enabled && not options.DisableMIRConstFolding + EnableCSE = enabled && not options.DisableMIRCSE + EnableCopyProp = enabled && not options.DisableMIRCopyProp + EnableDCE = enabled && not options.DisableMIRDCE + EnableCFGSimplify = enabled && not options.DisableMIRCFGSimplify + EnableLICM = enabled && not options.DisableMIRLICM + } + +let private shouldRunMIROptimize (mirOptions: MIR_Optimize.OptimizeOptions) : bool = + mirOptions.EnableConstFolding + || mirOptions.EnableCSE + || mirOptions.EnableCopyProp + || mirOptions.EnableDCE + || mirOptions.EnableCFGSimplify + || mirOptions.EnableLICM + +let private formatPassGroup (label: string) (passes: (string * bool) list) : string = + let enabled = + passes + |> List.choose (fun (name, isEnabled) -> if isEnabled then Some name else None) + let enabledNames = String.concat ", " enabled + match enabled with + | [] -> $"{label} (disabled)" + | _ -> $"{label} ({enabledNames})" + +/// Print ANF program in a consistent, human-readable format +let private printANFProgram (title: string) (program: ANF.Program) : unit = + println title + println (formatANF program) + println "" + +/// Print MIR program (with CFG) in a consistent format +let private printMIRProgram (title: string) (program: MIR.Program) : unit = + println title + println (formatMIR program) + println "" + +/// Print symbolic LIR program (with CFG) in a consistent format +let private printLIRProgram (title: string) (program: LIR.Program) : unit = + println title + println (formatLIR program) + println "" + +/// Run SSA + MIR/LIR optimizations, returning an optimized LIR program +let private compileMirToLir + (verbosity: int) + (options: CompilerOptions) + (sw: Stopwatch) + (passTimingRecorder: PassTimingRecorder option) + (stageSuffix: string) + (mirProgram: MIR.Program) + : Result = + + let suffix = if stageSuffix = "" then "" else $" ({stageSuffix})" + + if verbosity >= 1 then println $" [3.1/7] SSA Construction{suffix}..." + let ssaStart = sw.Elapsed.TotalMilliseconds + let ssaProgram = SSA_Construction.convertToSSA mirProgram + let ssaElapsed = sw.Elapsed.TotalMilliseconds - ssaStart + recordPassTiming passTimingRecorder "SSA Construction" ssaElapsed + if verbosity >= 2 then + let t = System.Math.Round(ssaElapsed, 1) + println $" {t}ms" + + let mirOptions = buildMIROptimizeOptions options + let mirPassLabel = + formatPassGroup + "MIR Optimizations" + [ + ("const_folding", mirOptions.EnableConstFolding) + ("cse", mirOptions.EnableCSE) + ("copy_prop", mirOptions.EnableCopyProp) + ("dce", mirOptions.EnableDCE) + ("cfg_simplify", mirOptions.EnableCFGSimplify) + ("licm", mirOptions.EnableLICM) + ] + if verbosity >= 1 then println $" [3.5/7] {mirPassLabel}{suffix}..." + let mirOptStart = sw.Elapsed.TotalMilliseconds + let optimizedProgram = + if shouldRunMIROptimize mirOptions then + MIR_Optimize.optimizeProgramWithOptions mirOptions ssaProgram + else + ssaProgram + let mirOptElapsed = sw.Elapsed.TotalMilliseconds - mirOptStart + recordPassTiming passTimingRecorder "MIR Optimizations" mirOptElapsed + if verbosity >= 2 then + let t = System.Math.Round(mirOptElapsed, 1) + println $" {t}ms" + + if verbosity >= 1 then println $" [4/7] MIR → LIR{suffix}..." + let lirStart = sw.Elapsed.TotalMilliseconds + let lirResult = MIR_to_LIR.toLIR optimizedProgram + match lirResult with + | Error err -> Error $"LIR conversion error: {err}" + | Ok lirProgram -> + let lirElapsed = sw.Elapsed.TotalMilliseconds - lirStart + recordPassTiming passTimingRecorder "MIR -> LIR" lirElapsed + if shouldDumpIR verbosity options.DumpLIR then + printLIRProgram "=== LIR (Low-level IR with CFG) ===" lirProgram + if verbosity >= 2 then + let t = System.Math.Round(lirElapsed, 1) + println $" {t}ms" + + let lirPassLabel = + formatPassGroup + "LIR Peephole" + [("peephole", not options.DisableLIROpt && not options.DisableLIRPeephole)] + if verbosity >= 1 then println $" [4.5/7] {lirPassLabel}{suffix}..." + let lirOptStart = sw.Elapsed.TotalMilliseconds + let optimizedLir = + if options.DisableLIROpt || options.DisableLIRPeephole then + lirProgram + else + LIR_Peephole.optimizeProgram lirProgram + let lirOptElapsed = sw.Elapsed.TotalMilliseconds - lirOptStart + recordPassTiming passTimingRecorder "LIR Peephole" lirOptElapsed + if verbosity >= 2 then + let t = System.Math.Round(lirOptElapsed, 1) + println $" {t}ms" + Ok optimizedLir + +/// Allocate registers for a list of symbolic LIR functions +let private allocateRegistersForFunctions + (functions: LIR.Function list) + : LIR.Function list = + let arch = match Platform.detectArch () with Ok a -> a | Error _ -> Platform.ARM64 + functions |> List.map (RegisterAllocation.allocateRegisters arch) + +/// Run MIR+LIR passes (including register allocation) from ANF functions +let private lowerToAllocatedLir + (verbosity: int) + (options: CompilerOptions) + (sw: Stopwatch) + (passTimingRecorder: PassTimingRecorder option) + (stageSuffix: string) + (functions: ANF.Function list) + (typeMap: ANF.TypeMap) + (registries: AST_to_ANF.Registries) + (externalReturnTypes: Map) + : Result = + + let suffix = if stageSuffix = "" then "" else $" ({stageSuffix})" + + let functionOrder = functions |> List.map (fun f -> f.Name) + let compileFunctions (functionsToCompile: ANF.Function list) : Result = + if List.isEmpty functionsToCompile then + Ok [] + else + if verbosity >= 1 then println $" [3/7] ANF → MIR{suffix}..." + let mirStart = sw.Elapsed.TotalMilliseconds + let anfProgram = ANF.Program (functionsToCompile, ANF.Return ANF.UnitLiteral) + let mirResult = + ANF_to_MIR.toMIRFunctionsOnly + anfProgram + typeMap + registries.FuncParams + registries.VariantLookup + registries.TypeReg + options.EnableCoverage + externalReturnTypes + match mirResult with + | Error err -> Error $"MIR conversion error: {err}" + | Ok (mirFuncs, variantRegistry, mirRecordRegistry) -> + let mirProgram = MIR.Program (mirFuncs, variantRegistry, mirRecordRegistry) + let mirElapsed = sw.Elapsed.TotalMilliseconds - mirStart + recordPassTiming passTimingRecorder "ANF -> MIR" mirElapsed + if shouldDumpIR verbosity options.DumpMIR then + printMIRProgram "=== MIR (Control Flow Graph) ===" mirProgram + if verbosity >= 2 then + let t = System.Math.Round(mirElapsed, 1) + println $" {t}ms" + compileMirToLir verbosity options sw passTimingRecorder stageSuffix mirProgram + |> Result.bind (fun lirProgram -> + if verbosity >= 1 then println " [5/7] Register Allocation..." + let allocStart = sw.Elapsed.TotalMilliseconds + let (LIR.Program lirFuncs) = lirProgram + let allocatedFuncs = allocateRegistersForFunctions lirFuncs + let allocElapsed = sw.Elapsed.TotalMilliseconds - allocStart + recordPassTiming passTimingRecorder "Register Allocation" allocElapsed + if verbosity >= 2 then + let t = System.Math.Round(allocElapsed, 1) + println $" {t}ms" + Ok allocatedFuncs) + + let compileFunctionsWithTiming + (label: string) + (functionsToCompile: ANF.Function list) + : Result = + if List.isEmpty functionsToCompile then + Ok [] + else + let startTime = sw.Elapsed.TotalMilliseconds + compileFunctions functionsToCompile + |> Result.map (fun compiled -> + let elapsed = sw.Elapsed.TotalMilliseconds - startTime + recordPassTiming passTimingRecorder label elapsed + compiled) + + let (startFunctions, otherFunctions) = + functions |> List.partition (fun func -> func.Name = "_start") + + let compileResult = + match passTimingRecorder, startFunctions with + | Some _, _ :: _ -> + compileFunctionsWithTiming "Start Function Compilation" startFunctions + |> Result.bind (fun compiledStart -> + compileFunctions otherFunctions + |> Result.map (fun compiledOther -> compiledStart @ compiledOther)) + | _ -> + compileFunctions functions + + compileResult + |> Result.map (fun compiledFuncs -> + // Keep per-name queues so duplicate function names (e.g. lifted __closure_N from + // different compilation units) preserve distinct bodies in original order. + let compiledQueues : Map = + List.foldBack + (fun (func: LIR.Function) (acc: Map) -> + let existing = Map.tryFind func.Name acc |> Option.defaultValue [] + Map.add func.Name (func :: existing) acc) + compiledFuncs + Map.empty + + let rec rebuildOrder + (remainingNames: string list) + (queues: Map) + (acc: LIR.Function list) + : LIR.Function list = + match remainingNames with + | [] -> + List.rev acc + | name :: rest -> + match Map.tryFind name queues with + | Some (nextFunc :: remainingFuncs) -> + let queues' = + if List.isEmpty remainingFuncs then + Map.remove name queues + else + Map.add name remainingFuncs queues + rebuildOrder rest queues' (nextFunc :: acc) + | _ -> + Crash.crash $"lowerToAllocatedLir: missing compiled function for '{name}'" + + rebuildOrder functionOrder compiledQueues []) + +let private buildConversionResult + (program: ANF.Program) + (registries: AST_to_ANF.Registries) + : AST_to_ANF.ConversionResult = + { + Program = program + TypeReg = registries.TypeReg + VariantLookup = registries.VariantLookup + FuncReg = registries.FuncReg + FuncParams = registries.FuncParams + ModuleRegistry = registries.ModuleRegistry + } + +/// Run ANF optimization + RC insertion, returning a final ANF function list and type map +let private buildAnf + (verbosity: int) + (options: CompilerOptions) + (sw: Stopwatch) + (registries: AST_to_ANF.Registries) + (functions: ANF.Function list) + (passTimingRecorder: PassTimingRecorder option) + : Result = + + let anfOptions = buildANFOptimizeOptions options + let anfPassLabel = + formatPassGroup + "ANF Optimizations" + [ + ("const_folding", anfOptions.EnableConstFolding) + ("const_prop", anfOptions.EnableConstProp) + ("copy_prop", anfOptions.EnableCopyProp) + ("dce", anfOptions.EnableDCE) + ("strength_reduction", anfOptions.EnableStrengthReduction) + ] + if verbosity >= 1 then println $" [2.3/7] {anfPassLabel}..." + let anfProgram = ANF.Program (functions, ANF.Return ANF.UnitLiteral) + if shouldDumpIR verbosity options.DumpANF then + printANFProgram "=== ANF (before optimization) ===" anfProgram + let anfOptStart = sw.Elapsed.TotalMilliseconds + let anfOptimized = + if shouldRunANFOptimize anfOptions then + ANF_Optimize.optimizeProgramWithOptions anfOptions anfProgram + else + anfProgram + let anfOptElapsed = sw.Elapsed.TotalMilliseconds - anfOptStart + recordPassTiming passTimingRecorder "ANF Optimizations" anfOptElapsed + if verbosity >= 2 then + let t = System.Math.Round(anfOptElapsed, 1) + println $" {t}ms" + if shouldDumpIR verbosity options.DumpANF then + printANFProgram "=== ANF (after optimization) ===" anfOptimized + + if verbosity >= 1 then println " [2.4/7] ANF Inlining..." + let inlineStart = sw.Elapsed.TotalMilliseconds + let anfInlined = + if options.DisableInlining then + anfOptimized + else + ANF_Inlining.inlineProgramDefault anfOptimized + let inlineElapsed = sw.Elapsed.TotalMilliseconds - inlineStart + recordPassTiming passTimingRecorder "ANF Inlining" inlineElapsed + if verbosity >= 2 then + let t = System.Math.Round(inlineElapsed, 1) + println $" {t}ms" + + let convResult = buildConversionResult anfInlined registries + + if verbosity >= 1 then println " [2.5/7] Reference Count Insertion..." + let rcStart = sw.Elapsed.TotalMilliseconds + let rcResult = RefCountInsertion.insertRCInProgram convResult + match rcResult with + | Error err -> Error $"Reference count insertion error: {err}" + | Ok (anfAfterRC, typeMap) -> + let rcElapsed = sw.Elapsed.TotalMilliseconds - rcStart + recordPassTiming passTimingRecorder "Reference Count Insertion" rcElapsed + if verbosity >= 2 then + let t = System.Math.Round(rcElapsed, 1) + println $" {t}ms" + if shouldDumpIR verbosity options.DumpANF then + printANFProgram "=== ANF (after RC insertion) ===" anfAfterRC + + let (ANF.Program (finalFunctions, _)) = anfAfterRC + Ok (finalFunctions, typeMap) + +/// Run tail call detection on a function list (for post-print insertion TCO) +let private applyTco + (verbosity: int) + (options: CompilerOptions) + (sw: Stopwatch) + (functions: ANF.Function list) + (passTimingRecorder: PassTimingRecorder option) + : ANF.Function list = + if verbosity >= 1 then println " [2.7/7] Tail Call Detection..." + let tcoStart = sw.Elapsed.TotalMilliseconds + let anfProgram = ANF.Program (functions, ANF.Return ANF.UnitLiteral) + let anfAfterTCO = + if options.DisableTCO then + anfProgram + else + TailCallDetection.detectTailCallsInProgram anfProgram + let tcoElapsed = sw.Elapsed.TotalMilliseconds - tcoStart + recordPassTiming passTimingRecorder "Tail Call Detection" tcoElapsed + if verbosity >= 2 then + let t = System.Math.Round(tcoElapsed, 1) + println $" {t}ms" + if shouldDumpIR verbosity options.DumpANF then + printANFProgram "=== ANF (after Tail Call Detection) ===" anfAfterTCO + let (ANF.Program (tcoFunctions, _)) = anfAfterTCO + tcoFunctions + +/// Run codegen, encoding, and binary generation +let private generateBinary + (verbosity: int) + (options: CompilerOptions) + (sw: Stopwatch) + (passTimingRecorder: PassTimingRecorder option) + (codegenLabel: string) + (emitLabel: string) + (dumpAsm: bool) + (dumpMachineCode: bool) + (allocatedProgram: LIR.Program) + : Result = + + match Platform.detectArch () with + | Error err -> Error $"Architecture detection error: {err}" + | Ok Platform.X86_64 -> + // x86-64 backend + if verbosity >= 1 then println codegenLabel + let codegenStart = sw.Elapsed.TotalMilliseconds + let codegenResult = CodeGen_X86_64.translateProgram allocatedProgram options.EnableLeakCheck + match codegenResult with + | Error err -> Error $"x86-64 code generation error: {err}" + | Ok x86Instructions -> + let codegenElapsed = sw.Elapsed.TotalMilliseconds - codegenStart + recordPassTiming passTimingRecorder "Code Generation" codegenElapsed + if verbosity >= 2 then + let t = System.Math.Round(codegenElapsed, 1) + println $" {t}ms" + + if dumpAsm && verbosity >= 3 then + println "=== x86-64 Assembly Instructions ===" + for (i, instr) in List.indexed x86Instructions do + println $" {i}: {instr}" + println "" + + if verbosity >= 1 then println (emitLabel.Replace("{format}", "ELF")) + let emitStart = sw.Elapsed.TotalMilliseconds + match X86_64_Resolve.resolveAndEncode x86Instructions with + | Error err -> Error $"x86-64 resolve error: {err}" + | Ok resolveResult -> + // Patch data labels (e.g., leak counter) if there are deferred fixups + let patchedResult = + if List.isEmpty resolveResult.DeferredFixups then + Ok resolveResult + else + let elfHeaderSize = 64 + let programHeaderSize = 56 + let codeFileOffset = elfHeaderSize + programHeaderSize + let codeSize = resolveResult.MachineCode.Length + let alignedDataStart = (codeFileOffset + codeSize + 7) &&& (~~~7) + // Leak counter is at start of data section (no float/string pools on x86_64) + let leakCounterFileOffset = alignedDataStart + let dataLabels = Map.ofList [("_leak_count", leakCounterFileOffset)] + X86_64_Resolve.patchDataLabels resolveResult dataLabels codeFileOffset + match patchedResult with + | Error err -> Error $"x86-64 data label error: {err}" + | Ok resolveResult -> + let entryOffset = + match Map.tryFind "_start" resolveResult.LabelPositions with + | Some offset -> offset + | None -> 0 + let binary = + Binary_Generation_ELF_X86_64.createExecutableWithPools + resolveResult.MachineCode LiteralPool.emptyStringPool LiteralPool.emptyFloatPool + options.EnableLeakCheck entryOffset + let emitElapsed = sw.Elapsed.TotalMilliseconds - emitStart + recordPassTiming passTimingRecorder "x86-64 Emit" emitElapsed + if verbosity >= 2 then + let t = System.Math.Round(emitElapsed, 1) + println $" {t}ms" + Ok binary + + | Ok Platform.ARM64 -> + // ARM64 backend (original) + if verbosity >= 1 then println codegenLabel + let codegenStart = sw.Elapsed.TotalMilliseconds + let coverageExprCount = if options.EnableCoverage then LIR.countCoverageHits allocatedProgram else 0 + let codegenOptions : CodeGen.CodeGenOptions = { + DisableFreeList = options.DisableFreeList + EnableCoverage = options.EnableCoverage + CoverageExprCount = coverageExprCount + EnableLeakCheck = options.EnableLeakCheck + } + let codegenResult = CodeGen.generateARM64WithOptions codegenOptions allocatedProgram + match codegenResult with + | Error err -> Error $"Code generation error: {err}" + | Ok arm64Instructions -> + let codegenElapsed = sw.Elapsed.TotalMilliseconds - codegenStart + recordPassTiming passTimingRecorder "Code Generation" codegenElapsed + if verbosity >= 2 then + let t = System.Math.Round(codegenElapsed, 1) + println $" {t}ms" + + if dumpAsm && verbosity >= 3 then + println "=== ARM64 Assembly Instructions ===" + for (i, instr) in List.indexed arm64Instructions do + println $" {i}: {instr}" + println "" + + match Platform.detectOS () with + | Error err -> Error $"Platform detection error: {err}" + | Ok os -> + let formatName = match os with | Platform.MacOS -> "Mach-O" | Platform.Linux -> "ELF" + if verbosity >= 1 then println (emitLabel.Replace("{format}", formatName)) + let emitStart = sw.Elapsed.TotalMilliseconds + let emitResult = ARM64_Emit.emitBinary arm64Instructions os options.EnableLeakCheck + match emitResult with + | Error err -> Error $"ARM64 emit error: {err}" + | Ok emit -> + let emitElapsed = sw.Elapsed.TotalMilliseconds - emitStart + recordPassTiming passTimingRecorder "ARM64 Emit" emitElapsed + if verbosity >= 2 then + let t = System.Math.Round(emitElapsed, 1) + println $" {t}ms" + + if dumpMachineCode && verbosity >= 3 then + println "=== Machine Code (hex) ===" + for i in 0 .. 4 .. (emit.MachineCode.Length - 1) do + if i + 3 < emit.MachineCode.Length then + let bytes = sprintf "%02x %02x %02x %02x" emit.MachineCode.[i] emit.MachineCode.[i+1] emit.MachineCode.[i+2] emit.MachineCode.[i+3] + println $" {i:X4}: {bytes}" + println $"Total: {emit.MachineCode.Length} bytes\n" + + Ok emit.Binary + + +let private buildBaseFuncNames + (registries: AST_to_ANF.Registries) + : Set = + registries.FuncParams + |> Map.fold (fun acc name _ -> Set.add name acc) Set.empty + +let private mergeReturnTypes + (baseReturnTypes: Map) + (overlayReturnTypes: Map) + : Map = + Map.fold (fun acc k v -> Map.add k v acc) baseReturnTypes overlayReturnTypes + +/// Shared compilation context used across pipeline steps +type PipelineContext = { + TypeCheckEnv: TypeChecking.TypeCheckEnv + GenericFuncDefs: AST_to_ANF.GenericFuncDefs + SpecRegistry: AST_to_ANF.SpecRegistry + Registries: AST_to_ANF.Registries + BaseFuncNames: Set + ReturnTypes: Map +} + +let private buildContext + (typeCheckEnv: TypeChecking.TypeCheckEnv) + (genericFuncDefs: AST_to_ANF.GenericFuncDefs) + (specRegistry: AST_to_ANF.SpecRegistry) + (registries: AST_to_ANF.Registries) + (returnTypes: Map) + : PipelineContext = + let baseFuncNames = buildBaseFuncNames registries + { + TypeCheckEnv = typeCheckEnv + GenericFuncDefs = genericFuncDefs + SpecRegistry = specRegistry + Registries = registries + BaseFuncNames = baseFuncNames + ReturnTypes = returnTypes + } + +/// Compiled preamble context - extends stdlib for a test file +/// Preamble functions are compiled ONCE per file, then reused for all tests in that file +type PreambleContext = { + /// Extended compilation context (stdlib + preamble) + Context: PipelineContext + /// Preamble's ANF functions (after mono, inline, lift, ANF, RC, TCO) + ANFFunctions: ANF.Function list + /// Type map from RC insertion (merged with stdlib's TypeMap) + TypeMap: ANF.TypeMap + /// Preamble's symbolic LIR functions after register allocation + SymbolicFunctions: LIR.Function list +} + +/// Parsed and typechecked preamble analysis for suite-level specialization +type PreambleAnalysis = { + TypedAST: AST.Program + TypeCheckEnv: TypeChecking.TypeCheckEnv + GenericFuncDefs: AST_to_ANF.GenericFuncDefs +} + +/// Result of compiling stdlib - can be reused across compilations +type StdlibResult = { + /// Parsed stdlib AST (for merging with user AST) + AST: AST.Program + /// Type-checked stdlib with inferred types + TypedAST: AST.Program + /// Shared compilation context (typecheck env + registries) + Context: PipelineContext + /// Pre-allocated stdlib functions (physical registers assigned, ready for merge) + AllocatedFunctions: LIR.Function list + /// Call graph for dead code elimination (which stdlib funcs call which other funcs) + StdlibCallGraph: Map> + /// Stdlib ANF functions indexed by name (for coverage analysis) + StdlibANFFunctions: Map + /// Call graph at ANF level (for coverage analysis reachability) + StdlibANFCallGraph: Map> + /// TypeMap from RC insertion (needed for getReachableStdlibFunctions) + StdlibTypeMap: ANF.TypeMap +} + +/// Context for compiling user code +type CompileContext = + | StdlibOnly of StdlibResult + | StdlibWithPreamble of StdlibResult * PreambleContext + +/// Request for compiling source code +type CompileRequest = { + Context: CompileContext + Mode: CompileMode + SourceSyntax: SourceSyntax + Source: string + SourceFile: string + AllowInternal: bool + Verbosity: int + Options: CompilerOptions + PassTimingRecorder: PassTimingRecorder option +} + + +// Helper functions for exception-to-Result conversion (Darklang compatibility) + +/// Extract return types from a FuncReg (FunctionRegistry maps func name -> full type) +/// This is needed because buildReturnTypeReg only includes functions in the current program, +/// but we need return types for all callable functions (including stdlib) +let private extractReturnTypes (funcReg: Map) : Map = + funcReg + |> Map.toSeq + |> Seq.choose (fun (name, typ) -> + match typ with + | AST.TFunction (_, retType) -> Some (name, retType) + | other -> Crash.crash $"extractReturnTypes: Non-function type '{other}' found in FuncReg for '{name}'") + |> Map.ofSeq + +let private emptyRegistries (moduleRegistry: AST.ModuleRegistry) : AST_to_ANF.Registries = + { + TypeReg = Map.empty + VariantLookup = Map.empty + FuncReg = Map.empty + FuncParams = Map.empty + ModuleRegistry = moduleRegistry + } + +let private liftLambdasWithBase + (baseRegistries: AST_to_ANF.Registries) + (baseFuncNames: Set) + (program: AST.Program) + : Result = + let baseFuncReturnTypes = extractReturnTypes baseRegistries.FuncReg + let baseFuncParamsWithReservedNames = + baseFuncNames + |> Set.fold (fun acc name -> + if Map.containsKey name acc then + acc + else + Map.add name [] acc) baseRegistries.FuncParams + AST_to_ANF.liftLambdasInProgram + baseRegistries.TypeReg + baseRegistries.VariantLookup + baseFuncParamsWithReservedNames + baseFuncReturnTypes + program + +let private mergeSpecRegistries + (baseRegistry: AST_to_ANF.SpecRegistry) + (overlayRegistry: AST_to_ANF.SpecRegistry) + : AST_to_ANF.SpecRegistry = + Map.fold (fun acc key value -> Map.add key value acc) baseRegistry overlayRegistry + +let private collectLocalSpecs + (genericDefs: AST_to_ANF.GenericFuncDefs) + (program: AST.Program) + : Set = + let (AST.Program topLevels) = program + let allSpecs = + topLevels + |> List.map (function + | AST.FunctionDef f when List.isEmpty f.TypeParams -> AST_to_ANF.collectTypeAppsFromFunc f + | AST.Expression e -> AST_to_ANF.collectTypeApps e + | _ -> Set.empty) + |> List.fold Set.union Set.empty + allSpecs + |> Set.filter (fun (funcName, _) -> Map.containsKey funcName genericDefs) + +type private MonomorphizationMode = + | Monomorphize of AST_to_ANF.GenericFuncDefs option + | ReplaceTypeApps of AST_to_ANF.SpecRegistry + | SpecializeLocalAndReplace of AST_to_ANF.SpecRegistry + +let private prepareProgramForAnf + (monomorphization: MonomorphizationMode) + (baseRegistries: AST_to_ANF.Registries) + (baseFuncNames: Set) + (program: AST.Program) + : Result = + let monomorphizedResult = + match monomorphization with + | Monomorphize None -> + Ok (AST_to_ANF.monomorphize program) + | Monomorphize (Some defs) -> + Ok (AST_to_ANF.monomorphizeWithExternalDefs defs program) + | ReplaceTypeApps specRegistry -> + AST_to_ANF.replaceTypeAppsInProgramWithRegistry specRegistry program + | SpecializeLocalAndReplace specRegistry -> + let localGenericDefs = AST_to_ANF.extractGenericFuncDefs program + if Map.isEmpty localGenericDefs then + AST_to_ANF.replaceTypeAppsInProgramWithRegistry specRegistry program + else + let localSpecs = collectLocalSpecs localGenericDefs program + let specialization = AST_to_ANF.specializeFromSpecs localGenericDefs localSpecs + let combinedSpecRegistry = + mergeSpecRegistries specRegistry specialization.SpecRegistry + let (AST.Program items) = program + let specializedTopLevels = specialization.SpecializedFuncs |> List.map AST.FunctionDef + let programWithSpecializations = AST.Program (specializedTopLevels @ items) + AST_to_ANF.replaceTypeAppsInProgramWithRegistry combinedSpecRegistry programWithSpecializations + match monomorphizedResult with + | Error err -> Error err + | Ok monomorphized -> + let (AST.Program topLevels) = monomorphized + let localFuncNames = + topLevels + |> List.choose (function AST.FunctionDef f -> Some f.Name | _ -> None) + |> Set.ofList + let knownFuncNames = Set.union baseFuncNames localFuncNames + let needsLowering = AST_to_ANF.programNeedsLambdaLowering knownFuncNames monomorphized + if needsLowering then + let inlined = AST_to_ANF.inlineLambdasInProgram monomorphized + liftLambdasWithBase baseRegistries baseFuncNames inlined + else + Ok monomorphized + +let private buildRegistriesForProgram + (moduleRegistry: AST.ModuleRegistry) + (baseRegistries: AST_to_ANF.Registries) + (typeDefs: AST.TypeDef list) + (functions: AST.FunctionDef list) + : AST_to_ANF.Registries * AST_to_ANF.Registries * AST.FunctionDef list = + let aliasReg = AST_to_ANF.buildAliasRegistry typeDefs + let resolvedFunctions = AST_to_ANF.resolveAliasesInFunctions aliasReg functions + let localRegistries = AST_to_ANF.buildRegistries moduleRegistry typeDefs aliasReg resolvedFunctions + let mergedRegistries = AST_to_ANF.mergeRegistries baseRegistries localRegistries + (mergedRegistries, localRegistries, resolvedFunctions) + +let private convertTypedProgramToConversionResult + (moduleRegistry: AST.ModuleRegistry) + (typedProgram: AST.Program) + : Result = + let baseRegistries = emptyRegistries moduleRegistry + let baseFuncNames = buildBaseFuncNames baseRegistries + prepareProgramForAnf (Monomorphize None) baseRegistries baseFuncNames typedProgram + |> Result.bind (fun liftedProgram -> + AST_to_ANF.splitTopLevels liftedProgram + |> Result.bind (fun (typeDefs, functions, expr) -> + let (registries, _localRegistries, resolvedFunctions) = + buildRegistriesForProgram moduleRegistry baseRegistries typeDefs functions + let varGen = ANF.VarGen 0 + AST_to_ANF.convertFunctions registries varGen resolvedFunctions + |> Result.bind (fun (anfFuncs, varGen1) -> + AST_to_ANF.convertExprToAnf registries varGen1 expr + |> Result.map (fun (anfExpr, _) -> + buildConversionResult (ANF.Program (anfFuncs, anfExpr)) registries)))) + +let private convertTypedProgramToUserOnlyWithMode + (baseContext: PipelineContext) + (monomorphization: MonomorphizationMode) + (typedProgram: AST.Program) + : Result = + let baseFuncNames = baseContext.BaseFuncNames + prepareProgramForAnf monomorphization baseContext.Registries baseFuncNames typedProgram + |> Result.bind (fun liftedProgram -> + AST_to_ANF.splitTopLevels liftedProgram + |> Result.bind (fun (typeDefs, functions, expr) -> + let (registries, localRegistries, resolvedFunctions) = + buildRegistriesForProgram baseContext.Registries.ModuleRegistry baseContext.Registries typeDefs functions + let localReturnTypes = extractReturnTypes localRegistries.FuncReg + let varGen = ANF.VarGen 0 + AST_to_ANF.convertFunctions registries varGen resolvedFunctions + |> Result.bind (fun (anfFuncs, varGen1) -> + AST_to_ANF.convertExprToAnf registries varGen1 expr + |> Result.map (fun (anfExpr, _) -> + { + UserFunctions = anfFuncs + MainExpr = anfExpr + TypeReg = registries.TypeReg + VariantLookup = registries.VariantLookup + FuncReg = registries.FuncReg + LocalReturnTypes = localReturnTypes + FuncParams = registries.FuncParams + ModuleRegistry = registries.ModuleRegistry + })))) + +let private convertTypedProgramToUserOnly + (baseContext: PipelineContext) + (typedProgram: AST.Program) + : Result = + convertTypedProgramToUserOnlyWithMode + baseContext + (Monomorphize (Some baseContext.GenericFuncDefs)) + typedProgram + +/// Try to delete a file, ignoring any errors +let private tryDeleteFile (path: string) : unit = + try File.Delete(path) with _ -> () + +/// Try to start a process, returning Result instead of throwing +let private tryStartProcess (info: ProcessStartInfo) : Result = + try Ok (Process.Start(info)) + with ex -> Error ex.Message + +let private checkProgramWithBaseEnvForSyntax + (sourceSyntax: SourceSyntax) + (warningSettings: AST.WarningSettings) + (baseEnv: TypeChecking.TypeCheckEnv) + (program: AST.Program) + : Result = + match sourceSyntax with + | InterpreterSyntax -> + TypeChecking.checkProgramWithBaseEnvAndSettings baseEnv true warningSettings program + | CompilerSyntax -> + TypeChecking.checkProgramWithBaseEnvAndSettings baseEnv false warningSettings program + +/// Parse and typecheck a preamble, returning typed AST + preamble typecheck env +let analyzePreamble + (sourceSyntax: SourceSyntax) + (allowInternal: bool) + (stdlib: StdlibResult) + (preamble: string) + : Result = + let preambleTerminator = + match sourceSyntax with + | CompilerSyntax -> "0" + | InterpreterSyntax -> "0L" + let preambleSource = preamble + $"\n{preambleTerminator}" + (match sourceSyntax with + | CompilerSyntax -> Parser.parseString allowInternal preambleSource + | InterpreterSyntax -> InterpreterParser.parseString allowInternal preambleSource) + |> Result.mapError (fun err -> $"Preamble parse error: {err}") + |> Result.bind (fun preambleAst -> + checkProgramWithBaseEnvForSyntax + sourceSyntax + defaultWarningSettings + stdlib.Context.TypeCheckEnv + preambleAst + |> Result.mapError (fun typeErr -> $"Preamble type error: {TypeChecking.typeErrorToString typeErr}") + |> Result.map (fun (_programType, typedPreambleAst, preambleTypeCheckEnv) -> + let preambleGenericDefs = AST_to_ANF.extractGenericFuncDefs typedPreambleAst + { + TypedAST = typedPreambleAst + TypeCheckEnv = preambleTypeCheckEnv + GenericFuncDefs = preambleGenericDefs + })) + +/// Load a .dark file allowing internal identifiers (for stdlib sources) +let private loadDarkFileAllowInternal (filename: string) : Result = + let exePath = Assembly.GetExecutingAssembly().Location + let exeDir = Path.GetDirectoryName(exePath) + let possiblePaths = [ + Path.Combine(exeDir, filename) + Path.Combine(exeDir, "..", "..", "..", "..", "src", "DarkCompiler", filename) + Path.Combine(Environment.CurrentDirectory, "src", "DarkCompiler", filename) + ] + let filePath = possiblePaths |> List.tryFind File.Exists + match filePath with + | None -> + let pathsStr = String.Join(", ", possiblePaths) + Error $"Could not find {filename} in any of: {pathsStr}" + | Some path -> + let source = File.ReadAllText(path) + Parser.parseString true source + |> Result.mapError (fun err -> $"Error parsing {filename}: {err}") + +/// Load the stdlib and unicode_data.dark files +/// Returns the merged stdlib AST or an error message +let private loadStdlib () : Result = + let stdlibFiles = [ + "stdlib/Int8.dark" + "stdlib/Int16.dark" + "stdlib/Int32.dark" + "stdlib/Int64.dark" + "stdlib/UInt8.dark" + "stdlib/UInt16.dark" + "stdlib/UInt32.dark" + "stdlib/UInt64.dark" + "stdlib/Bool.dark" + "stdlib/Builtin.dark" + "stdlib/Tuple2.dark" + "stdlib/Tuple3.dark" + "stdlib/Result.dark" + "stdlib/Option.dark" + "stdlib/List.dark" + "stdlib/Float.dark" + "stdlib/Path.dark" + "stdlib/Platform.dark" + "unicode_data.dark" + "stdlib/String.dark" + "stdlib/__Hash.dark" + "stdlib/Dict.dark" + "stdlib/__HAMT.dark" + "stdlib/Uuid.dark" + "stdlib/Date.dark" + "stdlib/Bytes.dark" + "stdlib/Char.dark" + "stdlib/AWS.dark" + "stdlib/Base64.dark" + "stdlib/Crypto.dark" + "stdlib/Math.dark" + "stdlib/__FingerTree.dark" + ] + let mergeFile (acc: AST.TopLevel list) (filename: string) : Result = + match loadDarkFileAllowInternal filename with + | Error err -> Error err + | Ok (AST.Program items) -> + Ok (acc @ items) + stdlibFiles + |> List.fold (fun acc filename -> Result.bind (fun items -> mergeFile items filename) acc) (Ok []) + |> Result.bind (fun items -> Ok (AST.Program items)) + + +/// Build stdlib in isolation, returning reusable result +/// This can be called once and the result reused for multiple user program compilations +let buildStdlibWithTrace + (passTimingRecorder: PassTimingRecorder option) + : Result = + match loadStdlib() with + | Error e -> + Error e + | Ok stdlibAst -> + // Add dummy main expression for type checking (stdlib has no main) + let (AST.Program items) = stdlibAst + let withMain = AST.Program (items @ [AST.Expression AST.UnitLiteral]) + + match TypeChecking.checkProgramWithEnv withMain with + | Error e -> + let msg = TypeChecking.typeErrorToString e + Error msg + | Ok (_, typedStdlib, typeCheckEnv) -> + // Extract generic function definitions for on-demand monomorphization + let genericFuncDefs = AST_to_ANF.extractGenericFuncDefs typedStdlib + // Build module registry once (reused across all compilations) + let moduleRegistry = Stdlib.buildModuleRegistry () + match convertTypedProgramToConversionResult moduleRegistry typedStdlib with + | Error e -> + Error e + | Ok anfResult -> + let sw = Stopwatch.StartNew() + let registries : AST_to_ANF.Registries = { + TypeReg = anfResult.TypeReg + VariantLookup = anfResult.VariantLookup + FuncReg = anfResult.FuncReg + FuncParams = anfResult.FuncParams + ModuleRegistry = anfResult.ModuleRegistry + } + let returnTypes = extractReturnTypes registries.FuncReg + let context = buildContext typeCheckEnv genericFuncDefs Map.empty registries returnTypes + let (ANF.Program (stdlibFunctions, _)) = anfResult.Program + let stdlibOptions = { defaultOptions with DisableANFOpt = true; DisableInlining = true } + match buildAnf 0 stdlibOptions sw registries stdlibFunctions passTimingRecorder with + | Error e -> + Error e + | Ok (anfFunctions, typeMap) -> + let tcoFunctions = applyTco 0 stdlibOptions sw anfFunctions passTimingRecorder + let stdlibFuncMap = + tcoFunctions + |> List.map (fun f -> f.Name, f) + |> Map.ofList + let stdlibLiftedFuncNames = + tcoFunctions + |> List.map (fun f -> f.Name) + |> Set.ofList + let contextWithLiftedNames = { + context with + BaseFuncNames = Set.union context.BaseFuncNames stdlibLiftedFuncNames + } + let stdlibANFCallGraph = ANFDeadCodeElimination.buildCallGraph tcoFunctions + + let externalReturnTypes = returnTypes + match lowerToAllocatedLir + 0 + stdlibOptions + sw + passTimingRecorder + "stdlib" + tcoFunctions + typeMap + registries + externalReturnTypes with + | Error e -> + Error e + | Ok allocatedFuncs -> + let stdlibCallGraph = DeadCodeElimination.buildCallGraph allocatedFuncs + Ok { + AST = stdlibAst + TypedAST = typedStdlib + Context = contextWithLiftedNames + AllocatedFunctions = allocatedFuncs + StdlibCallGraph = stdlibCallGraph + StdlibANFFunctions = stdlibFuncMap + StdlibANFCallGraph = stdlibANFCallGraph + StdlibTypeMap = typeMap + } + +/// Build stdlib in isolation with default settings +let buildStdlib () : Result = + buildStdlibWithTrace None + +/// Build stdlib specializations for a spec set and merge them into the stdlib result +let buildStdlibSpecializations + (stdlib: StdlibResult) + (specs: Set) + (passTimingRecorder: PassTimingRecorder option) + : Result = + if Set.isEmpty specs then + Ok stdlib + else + let specialization = AST_to_ANF.specializeFromSpecs stdlib.Context.GenericFuncDefs specs + let combinedSpecRegistry = mergeSpecRegistries stdlib.Context.SpecRegistry specialization.SpecRegistry + let existingNames = + stdlib.StdlibANFFunctions + |> Map.keys + |> Set.ofSeq + let newSpecializedFuncs = + specialization.SpecializedFuncs + |> List.filter (fun f -> not (Set.contains f.Name existingNames)) + + if List.isEmpty newSpecializedFuncs then + let updatedContext = { stdlib.Context with SpecRegistry = combinedSpecRegistry } + Ok { + stdlib with + Context = updatedContext + } + else + let rec mapResult (f: 'a -> Result<'b, string>) (items: 'a list) : Result<'b list, string> = + match items with + | [] -> Ok [] + | x :: xs -> + f x + |> Result.bind (fun x' -> + mapResult f xs + |> Result.map (fun xs' -> x' :: xs')) + + AST_to_ANF.splitTopLevels stdlib.TypedAST + |> Result.bind (fun (typeDefs, _functions, _expr) -> + let (registries, localRegistries, resolvedFunctions) = + buildRegistriesForProgram + stdlib.Context.Registries.ModuleRegistry + stdlib.Context.Registries + typeDefs + newSpecializedFuncs + let localReturnTypes = extractReturnTypes localRegistries.FuncReg + + let replacedFunctionsResult = + resolvedFunctions + |> mapResult (AST_to_ANF.replaceTypeAppsInFuncWithRegistry combinedSpecRegistry) + + replacedFunctionsResult + |> Result.bind (fun replacedFunctions -> + let varGen = ANF.VarGen 0 + AST_to_ANF.convertFunctions registries varGen replacedFunctions + |> Result.bind (fun (anfFuncs, _varGen1) -> + let stdlibOptions = { defaultOptions with DisableANFOpt = true; DisableInlining = true } + let sw = Stopwatch.StartNew() + buildAnf 0 stdlibOptions sw registries anfFuncs passTimingRecorder + |> Result.bind (fun (anfFunctions, typeMap) -> + let tcoFunctions = applyTco 0 stdlibOptions sw anfFunctions passTimingRecorder + let newAnfFuncMap = + tcoFunctions + |> List.map (fun f -> f.Name, f) + |> Map.ofList + let externalReturnTypes = + mergeReturnTypes stdlib.Context.ReturnTypes localReturnTypes + lowerToAllocatedLir + 0 + stdlibOptions + sw + passTimingRecorder + "stdlib_specializations" + tcoFunctions + typeMap + registries + externalReturnTypes + |> Result.bind (fun allocatedFuncs -> + let allLirFuncs = stdlib.AllocatedFunctions @ allocatedFuncs + let mergedStdlibTypeMap = + Map.fold (fun acc k v -> Map.add k v acc) stdlib.StdlibTypeMap typeMap + let mergedStdlibAnfFunctions = + Map.fold (fun acc k v -> Map.add k v acc) stdlib.StdlibANFFunctions newAnfFuncMap + let allAnfFunctions = + mergedStdlibAnfFunctions + |> Map.toList + |> List.map snd + let stdlibCallGraph = DeadCodeElimination.buildCallGraph allLirFuncs + let stdlibAnfCallGraph = ANFDeadCodeElimination.buildCallGraph allAnfFunctions + let specializedFuncNames = + mergedStdlibAnfFunctions + |> Map.keys + |> Set.ofSeq + let baseFuncNames = + Set.union + stdlib.Context.BaseFuncNames + (Set.union (buildBaseFuncNames registries) specializedFuncNames) + let updatedContext = { + stdlib.Context with + Registries = registries + SpecRegistry = combinedSpecRegistry + BaseFuncNames = baseFuncNames + ReturnTypes = externalReturnTypes + } + Ok { + stdlib with + Context = updatedContext + AllocatedFunctions = allLirFuncs + StdlibCallGraph = stdlibCallGraph + StdlibANFFunctions = mergedStdlibAnfFunctions + StdlibANFCallGraph = stdlibAnfCallGraph + StdlibTypeMap = mergedStdlibTypeMap + } + ) + ) + ) + ) + ) + +type private UserCompileLabels = { + Parse: string + TypeCheck: string + Anf: string + StageSuffix: string +} + +type private UserCompilePlan = { + AllowInternal: bool + SourceSyntax: SourceSyntax + Verbosity: int + Options: CompilerOptions + PassTimingRecorder: PassTimingRecorder option + Stdlib: StdlibResult + BaseContext: PipelineContext + Monomorphization: MonomorphizationMode + PrebuiltSymbolicFunctions: LIR.Function list + SkipFunctionNames: Set + EmitFunctionEvents: bool + TreeShakeUserFunctions: bool + Labels: UserCompileLabels + SourceFile: string + Source: string +} + +/// Parse source text into AST using a selected Darklang syntax +let parseProgram + (sourceSyntax: SourceSyntax) + (allowInternal: bool) + (source: string) + : Result = + match sourceSyntax with + | CompilerSyntax -> Parser.parseString allowInternal source + | InterpreterSyntax -> InterpreterParser.parseString allowInternal source + +/// Compile a user/test program against a prebuilt stdlib/preamble context +let private compileUserWithPlan (plan: UserCompilePlan) : CompileReport = + let sw = Stopwatch.StartNew() + let result = + try + // Pass 1: Parse user code only + if plan.Verbosity >= 1 then println plan.Labels.Parse + let parseResult = parseProgram plan.SourceSyntax plan.AllowInternal plan.Source + let parseTime = sw.Elapsed.TotalMilliseconds + recordPassTiming plan.PassTimingRecorder "Parse" parseTime + if plan.Verbosity >= 2 then + let t = System.Math.Round(parseTime, 1) + println $" {t}ms" + + match parseResult with + | Error err -> Error $"Parse error: {err}" + | Ok userAst -> + // Pass 1.5: Type Checking (user code with base TypeCheckEnv) + if plan.Verbosity >= 1 then println plan.Labels.TypeCheck + let typeCheckResult = + checkProgramWithBaseEnvForSyntax + plan.SourceSyntax + plan.Options.Warnings + plan.BaseContext.TypeCheckEnv + userAst + let typeCheckTime = sw.Elapsed.TotalMilliseconds - parseTime + recordPassTiming plan.PassTimingRecorder "Type Checking" typeCheckTime + if plan.Verbosity >= 2 then + let t = System.Math.Round(typeCheckTime, 1) + println $" {t}ms" + + match typeCheckResult with + | Error typeErr -> Error (TypeChecking.typeErrorToString typeErr) + | Ok (programType, typedUserAst, _userEnv) -> + if plan.Verbosity >= 3 then + println $"Program type: {TypeChecking.typeToString programType}" + println "" + + // Pass 2: AST → ANF (user only) + if plan.Verbosity >= 1 then println plan.Labels.Anf + let userOnlyResult = + convertTypedProgramToUserOnlyWithMode + plan.BaseContext + plan.Monomorphization + typedUserAst + let anfTime = sw.Elapsed.TotalMilliseconds - parseTime - typeCheckTime + recordPassTiming plan.PassTimingRecorder "AST -> ANF" anfTime + if plan.Verbosity >= 2 then + let t = System.Math.Round(anfTime, 1) + println $" {t}ms" + + match userOnlyResult with + | Error err -> Error $"ANF conversion error: {err}" + | Ok userOnly -> + let functionsToCompile = + userOnly.UserFunctions + |> List.filter (fun f -> not (Set.contains f.Name plan.SkipFunctionNames)) + + if plan.EmitFunctionEvents && plan.Verbosity >= 3 then + println $" [COMPILE] {functionsToCompile.Length} user functions compiled fresh" + for f in functionsToCompile do + println $" - {f.Name}" + + let entryFunction = + AST_to_ANF.synthesizeEntryFunction "_start" programType userOnly.MainExpr + let userRegistries : AST_to_ANF.Registries = { + TypeReg = userOnly.TypeReg + VariantLookup = userOnly.VariantLookup + FuncReg = userOnly.FuncReg + FuncParams = userOnly.FuncParams + ModuleRegistry = userOnly.ModuleRegistry + } + let anfResult = + buildAnf + plan.Verbosity + plan.Options + sw + userRegistries + (entryFunction :: functionsToCompile) + plan.PassTimingRecorder + match anfResult with + | Error err -> Error err + | Ok (anfFunctions, typeMap) -> + if plan.Verbosity >= 1 then println " [2.6/7] Print Insertion..." + let printStart = sw.Elapsed.TotalMilliseconds + match PrintInsertion.insertPrintInEntry "_start" programType anfFunctions with + | Error err -> Error $"Print insertion error: {err}" + | Ok printedFunctions -> + let printElapsed = sw.Elapsed.TotalMilliseconds - printStart + recordPassTiming plan.PassTimingRecorder "Print Insertion" printElapsed + if plan.Verbosity >= 2 then + let t = System.Math.Round(printElapsed, 1) + println $" {t}ms" + if shouldDumpIR plan.Verbosity plan.Options.DumpANF then + let printProgram = ANF.Program (printedFunctions, ANF.Return ANF.UnitLiteral) + printANFProgram "=== ANF (after Print insertion) ===" printProgram + + let tcoFunctions = applyTco plan.Verbosity plan.Options sw printedFunctions plan.PassTimingRecorder + let externalReturnTypes = + mergeReturnTypes plan.BaseContext.ReturnTypes userOnly.LocalReturnTypes + let userLirResult = + lowerToAllocatedLir + plan.Verbosity + plan.Options + sw + plan.PassTimingRecorder + plan.Labels.StageSuffix + tcoFunctions + typeMap + userRegistries + externalReturnTypes + match userLirResult with + | Error err -> Error err + | Ok allocatedUserFuncs -> + let allSymbolicUserFuncs = plan.PrebuiltSymbolicFunctions @ allocatedUserFuncs + let finalUserFuncs = + if plan.TreeShakeUserFunctions then + if plan.Verbosity >= 1 then println " [5.5/7] Function Tree Shaking..." + let treeShakeStart = sw.Elapsed.TotalMilliseconds + let shakenUserFuncs = + if plan.Options.DisableFunctionTreeShaking then + allSymbolicUserFuncs + else + FunctionTreeShaking.filterUserFunctions (Some "_start") allSymbolicUserFuncs + let treeShakeElapsed = sw.Elapsed.TotalMilliseconds - treeShakeStart + recordPassTiming plan.PassTimingRecorder "Function Tree Shaking" treeShakeElapsed + shakenUserFuncs + else + allSymbolicUserFuncs + + if plan.EmitFunctionEvents && plan.Verbosity >= 3 then + println $" [COMBINED] fresh: {allocatedUserFuncs.Length}, total: {allSymbolicUserFuncs.Length}" + for f in allSymbolicUserFuncs do + println $" - {f.Name}" + println $" [TreeShaking] user funcs: {finalUserFuncs.Length}" + + // Filter stdlib functions to only include reachable ones (dead code elimination) + let reachableStdlib = + if plan.Options.DisableFunctionTreeShaking then plan.Stdlib.AllocatedFunctions + else + let treeShakeStart = sw.Elapsed.TotalMilliseconds + FunctionTreeShaking.filterStdlibFunctions + plan.Stdlib.StdlibCallGraph + finalUserFuncs + plan.Stdlib.AllocatedFunctions + |> fun shakenStdlib -> + let treeShakeElapsed = sw.Elapsed.TotalMilliseconds - treeShakeStart + recordPassTiming plan.PassTimingRecorder "Function Tree Shaking" treeShakeElapsed + shakenStdlib + + // Combine reachable stdlib functions with user functions + let allFuncs = reachableStdlib @ finalUserFuncs + let allocatedProgram = LIR.Program allFuncs + if shouldDumpIR plan.Verbosity plan.Options.DumpLIR then + printLIRProgram "=== LIR (After Register Allocation) ===" allocatedProgram + + let binaryResult = + generateBinary + plan.Verbosity + plan.Options + sw + plan.PassTimingRecorder + " [6/7] Code Generation..." + " [7/7] ARM64 Emit ({format})..." + false + false + allocatedProgram + match binaryResult with + | Error err -> Error err + | Ok binary -> + Ok binary + with + | ex -> + Error $"Compilation failed: {ex.Message}" + sw.Stop() + match result with + | Ok _ when plan.Verbosity >= 1 -> + println $" ✓ Compilation complete ({System.Math.Round(sw.Elapsed.TotalMilliseconds, 1)}ms)" + | _ -> () + { Result = result; CompileTime = sw.Elapsed } + +/// Build preamble with stdlib as base, returning extended context for test compilation +/// Preamble functions go through the full pipeline (parse → typecheck → mono → inline → lift → ANF → RC → TCO) +/// The result is built once per file and reused for all tests in that file +let buildPreambleContext + (allowInternal: bool) + (stdlib: StdlibResult) + (preamble: string) + (sourceFile: string) + (_funcLineMap: Map) + (passTimingRecorder: PassTimingRecorder option) + : Result = + // Handle empty preamble - return a context that just wraps stdlib + if String.IsNullOrWhiteSpace(preamble) then + let emptyContext = { + Context = stdlib.Context + ANFFunctions = [] + TypeMap = stdlib.StdlibTypeMap + SymbolicFunctions = [] + } + Ok (stdlib, emptyContext) + else + // Parse preamble with dummy expression (parser requires a main expression) + let preambleSource = preamble + "\n0" + match Parser.parseString allowInternal preambleSource with + | Error err -> + let msg = $"Preamble parse error: {err}" + Error msg + | Ok preambleAst -> + // Type-check preamble with stdlib context + match TypeChecking.checkProgramWithBaseEnv stdlib.Context.TypeCheckEnv preambleAst with + | Error typeErr -> + let msg = $"Preamble type error: {TypeChecking.typeErrorToString typeErr}" + Error msg + | Ok (_programType, typedPreambleAst, preambleTypeCheckEnv) -> + // Extract generic function definitions from preamble + let preambleGenericDefs = AST_to_ANF.extractGenericFuncDefs typedPreambleAst + // Merge stdlib generics with preamble generics + let mergedGenericDefs = Map.fold (fun acc k v -> Map.add k v acc) stdlib.Context.GenericFuncDefs preambleGenericDefs + + // Convert preamble to ANF (mono → inline → lift → ANF) + match convertTypedProgramToUserOnly stdlib.Context typedPreambleAst with + | Error err -> + let msg = $"Preamble ANF conversion error: {err}" + Error msg + | Ok preambleUserOnly -> + let preambleRegistries : AST_to_ANF.Registries = { + TypeReg = preambleUserOnly.TypeReg + VariantLookup = preambleUserOnly.VariantLookup + FuncReg = preambleUserOnly.FuncReg + FuncParams = preambleUserOnly.FuncParams + ModuleRegistry = preambleUserOnly.ModuleRegistry + } + let preambleOptions = defaultOptions + let sw = Stopwatch.StartNew() + let preambleReturnTypes = + mergeReturnTypes stdlib.Context.ReturnTypes preambleUserOnly.LocalReturnTypes + let pipelineContext = + buildContext preambleTypeCheckEnv mergedGenericDefs Map.empty preambleRegistries preambleReturnTypes + match buildAnf 0 preambleOptions sw preambleRegistries preambleUserOnly.UserFunctions passTimingRecorder with + | Error err -> + let rcPrefix = "Reference count insertion error: " + let msg = + if err.StartsWith(rcPrefix) then + let suffix = err.Substring(rcPrefix.Length) + $"Preamble RC insertion error: {suffix}" + else + $"Preamble {err}" + Error msg + | Ok (preambleFunctions, typeMap) -> + let tcoFunctions = applyTco 0 preambleOptions sw preambleFunctions passTimingRecorder + let preambleExternalReturnTypes = preambleReturnTypes + match lowerToAllocatedLir + 0 + preambleOptions + sw + passTimingRecorder + "preamble" + tcoFunctions + typeMap + preambleRegistries + preambleExternalReturnTypes with + | Error err -> + let msg = $"Preamble {err}" + Error msg + | Ok allocatedFuncs -> + let stdlibFuncNames = + stdlib.AllocatedFunctions + |> List.map (fun func -> func.Name) + |> Set.ofList + let isStdlibFunction (name: string) : bool = + Set.contains name stdlibFuncNames + let preambleOnlyFuncs = + allocatedFuncs + |> List.filter (fun func -> not (isStdlibFunction func.Name)) + let preambleSymbolicFuncs = preambleOnlyFuncs + let preambleLiftedFuncNames = + tcoFunctions + |> List.map (fun func -> func.Name) + |> Set.ofList + let pipelineContextWithLiftedNames = { + pipelineContext with + BaseFuncNames = + Set.union pipelineContext.BaseFuncNames preambleLiftedFuncNames + } + + // Merge TypeMaps (stdlib + preamble) + let mergedTypeMap = Map.fold (fun acc k v -> Map.add k v acc) stdlib.StdlibTypeMap typeMap + + let context = { + Context = pipelineContextWithLiftedNames + ANFFunctions = tcoFunctions + TypeMap = mergedTypeMap + SymbolicFunctions = preambleSymbolicFuncs + } + Ok (stdlib, context) + +/// Build preamble context from a typed preamble analysis and precomputed specializations +let buildPreambleContextFromAnalysis + (stdlib: StdlibResult) + (analysis: PreambleAnalysis) + (specialization: AST_to_ANF.SpecializationResult) + (sourceFile: string) + (_funcLineMap: Map) + (passTimingRecorder: PassTimingRecorder option) + : Result = + let combinedSpecRegistry = mergeSpecRegistries stdlib.Context.SpecRegistry specialization.SpecRegistry + + let mergedGenericDefs = + Map.fold (fun acc k v -> Map.add k v acc) stdlib.Context.GenericFuncDefs analysis.GenericFuncDefs + + let (AST.Program items) = analysis.TypedAST + let specializedTopLevels = specialization.SpecializedFuncs |> List.map AST.FunctionDef + let programWithSpecializations = AST.Program (specializedTopLevels @ items) + + convertTypedProgramToUserOnlyWithMode + stdlib.Context + (ReplaceTypeApps combinedSpecRegistry) + programWithSpecializations + |> Result.bind (fun preambleUserOnly -> + let preambleRegistries : AST_to_ANF.Registries = { + TypeReg = preambleUserOnly.TypeReg + VariantLookup = preambleUserOnly.VariantLookup + FuncReg = preambleUserOnly.FuncReg + FuncParams = preambleUserOnly.FuncParams + ModuleRegistry = preambleUserOnly.ModuleRegistry + } + let preambleOptions = defaultOptions + let sw = Stopwatch.StartNew() + let preambleReturnTypes = + mergeReturnTypes stdlib.Context.ReturnTypes preambleUserOnly.LocalReturnTypes + let pipelineContext = + buildContext analysis.TypeCheckEnv mergedGenericDefs combinedSpecRegistry preambleRegistries preambleReturnTypes + match buildAnf 0 preambleOptions sw preambleRegistries preambleUserOnly.UserFunctions passTimingRecorder with + | Error err -> + let rcPrefix = "Reference count insertion error: " + let msg = + if err.StartsWith(rcPrefix) then + let suffix = err.Substring(rcPrefix.Length) + $"Preamble RC insertion error: {suffix}" + else + $"Preamble {err}" + Error msg + | Ok (preambleFunctions, typeMap) -> + let tcoFunctions = applyTco 0 preambleOptions sw preambleFunctions passTimingRecorder + let preambleExternalReturnTypes = preambleReturnTypes + match lowerToAllocatedLir + 0 + preambleOptions + sw + passTimingRecorder + "preamble" + tcoFunctions + typeMap + preambleRegistries + preambleExternalReturnTypes with + | Error err -> + let msg = $"Preamble {err}" + Error msg + | Ok allocatedFuncs -> + let stdlibFuncNames = + stdlib.AllocatedFunctions + |> List.map (fun func -> func.Name) + |> Set.ofList + let isStdlibFunction (name: string) : bool = + Set.contains name stdlibFuncNames + let preambleOnlyFuncs = + allocatedFuncs + |> List.filter (fun func -> not (isStdlibFunction func.Name)) + let preambleSymbolicFuncs = preambleOnlyFuncs + + let mergedTypeMap = Map.fold (fun acc k v -> Map.add k v acc) stdlib.StdlibTypeMap typeMap + + Ok (stdlib, { + Context = pipelineContext + ANFFunctions = tcoFunctions + TypeMap = mergedTypeMap + SymbolicFunctions = preambleSymbolicFuncs + })) + +let private labelsForMode (mode: CompileMode) : UserCompileLabels = + match mode with + | FullProgram -> + { + Parse = " [1/7] Parse..." + TypeCheck = " [1.5/7] Type Checking (with stdlib env)..." + Anf = " [2/7] AST → ANF (user only)..." + StageSuffix = "user only" + } + | TestExpression -> + { + Parse = " [1/7] Parse (test expr only)..." + TypeCheck = " [1.5/7] Type Checking (with preamble env)..." + Anf = " [2/7] AST → ANF (test expr only)..." + StageSuffix = "" + } + +let private buildCompilePlan (request: CompileRequest) : UserCompilePlan = + let (stdlib, baseContext, prebuiltSymbolic, skipNames) = + match request.Context with + | StdlibOnly stdlib -> + stdlib, stdlib.Context, [], Set.empty + | StdlibWithPreamble (stdlib, preambleCtx) -> + let preambleFuncs = preambleCtx.SymbolicFunctions + let preambleFuncNameSet = + preambleFuncs |> List.map (fun f -> f.Name) |> Set.ofList + stdlib, preambleCtx.Context, preambleFuncs, preambleFuncNameSet + + let emitFunctionEvents, treeShakeUserFunctions = + match request.Mode with + | FullProgram -> false, false + | TestExpression -> true, true + + let monomorphization = + match request.Mode with + | FullProgram -> Monomorphize (Some baseContext.GenericFuncDefs) + | TestExpression -> SpecializeLocalAndReplace baseContext.SpecRegistry + + { + AllowInternal = request.AllowInternal + SourceSyntax = request.SourceSyntax + Verbosity = request.Verbosity + Options = request.Options + PassTimingRecorder = request.PassTimingRecorder + Stdlib = stdlib + BaseContext = baseContext + Monomorphization = monomorphization + PrebuiltSymbolicFunctions = prebuiltSymbolic + SkipFunctionNames = skipNames + EmitFunctionEvents = emitFunctionEvents + TreeShakeUserFunctions = treeShakeUserFunctions + Labels = labelsForMode request.Mode + SourceFile = request.SourceFile + Source = request.Source + } + +/// Compile source code to binary (in-memory, no file I/O) +let compile (request: CompileRequest) : CompileReport = + let plan = buildCompilePlan request + compileUserWithPlan plan + +/// Execute compiled binary and capture output +let execute (verbosity: int) (binary: byte array) : ExecutionOutput = + let sw = Stopwatch.StartNew() + let finish (exitCode: int) (stdout: string) (stderr: string) : ExecutionOutput = + sw.Stop() + { ExitCode = exitCode + Stdout = stdout + Stderr = stderr + RuntimeTime = sw.Elapsed } + + if verbosity >= 1 then println "" + if verbosity >= 1 then println " Execution:" + + // Write binary to temp file + if verbosity >= 1 then println " • Writing binary to temp file..." + let tempPath = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString("N")) + + // Write and flush to disk to minimize (but not eliminate) "Text file busy" race + do + use stream = new IO.FileStream(tempPath, IO.FileMode.Create, IO.FileAccess.Write, IO.FileShare.None) + stream.Write(binary, 0, binary.Length) + stream.Flush(true) // Flush both stream and OS buffers to disk + + let writeTime = sw.Elapsed.TotalMilliseconds + if verbosity >= 2 then println $" {System.Math.Round(writeTime, 1)}ms" + + let result = + try + // Make executable using Unix file mode + if verbosity >= 1 then println " • Setting executable permissions..." + let permissions = File.GetUnixFileMode(tempPath) + File.SetUnixFileMode(tempPath, permissions ||| IO.UnixFileMode.UserExecute) + let chmodTime = sw.Elapsed.TotalMilliseconds - writeTime + if verbosity >= 2 then println $" {System.Math.Round(chmodTime, 1)}ms" + + // Code sign with adhoc signature (required for macOS only) + let codesignResult = + match Platform.detectOS () with + | Error err -> + // Platform detection failed + Some $"Platform detection failed: {err}" + | Ok os -> + if Platform.requiresCodeSigning os then + if verbosity >= 1 then println " • Code signing (adhoc)..." + let codesignStart = sw.Elapsed.TotalMilliseconds + let codesignInfo = ProcessStartInfo("codesign") + codesignInfo.Arguments <- $"-s - \"{tempPath}\"" + codesignInfo.UseShellExecute <- false + codesignInfo.RedirectStandardOutput <- true + codesignInfo.RedirectStandardError <- true + let codesignProc = Process.Start(codesignInfo) + codesignProc.WaitForExit() + + if codesignProc.ExitCode <> 0 then + let stderr = codesignProc.StandardError.ReadToEnd() + Some $"Code signing failed: {stderr}" + else + let codesignTime = sw.Elapsed.TotalMilliseconds - codesignStart + if verbosity >= 2 then println $" {System.Math.Round(codesignTime, 1)}ms" + None + else + if verbosity >= 1 then println " • Code signing skipped (not required on Linux)" + None + + match codesignResult with + | Some errorMsg -> + // Code signing or platform detection failed - return error + finish -1 "" errorMsg + | None -> + // Execute (with retry for "Text file busy" race condition) + // Even with flush, kernel may not have fully synced file/permissions in fast test runs + if verbosity >= 1 then println " • Running binary..." + let execStart = sw.Elapsed.TotalMilliseconds + let execInfo = ProcessStartInfo(tempPath) + execInfo.RedirectStandardOutput <- true + execInfo.RedirectStandardError <- true + execInfo.UseShellExecute <- false + + // Retry up to 3 times with small delay if we get "Text file busy" + let rec startWithRetry attempts = + match tryStartProcess execInfo with + | Ok proc -> Ok proc + | Error msg when msg.Contains("Text file busy") && attempts > 0 -> + Threading.Thread.Sleep(10) // Wait 10ms before retry + startWithRetry (attempts - 1) + | Error msg -> Error msg + + match startWithRetry 3 with + | Error msg -> + finish -1 "" $"Failed to start process: {msg}" + | Ok execProc -> + use proc = execProc + // Start async reads immediately to avoid blocking + let stdoutTask = proc.StandardOutput.ReadToEndAsync() + let stderrTask = proc.StandardError.ReadToEndAsync() + + // Wait for process to complete + proc.WaitForExit() + + // Now wait for output to be fully read + let stdout = stdoutTask.Result + let stderr = stderrTask.Result + + let execTime = sw.Elapsed.TotalMilliseconds - execStart + if verbosity >= 2 then println $" {System.Math.Round(execTime, 1)}ms" + + if verbosity >= 1 then + println $" ✓ Execution complete ({System.Math.Round(sw.Elapsed.TotalMilliseconds, 1)}ms)" + + finish proc.ExitCode stdout stderr + finally + // Cleanup - ignore deletion errors + tryDeleteFile tempPath + result + +/// Get all stdlib function names from the prebuilt stdlib +let getAllStdlibFunctionNamesFromStdlib (stdlib: StdlibResult) : Set = + stdlib.StdlibANFFunctions |> Map.keys |> Set.ofSeq + +/// Get the set of stdlib function names reachable from user code (using prebuilt stdlib) +/// Used for coverage analysis without re-compiling stdlib +let getReachableStdlibFunctionsFromStdlib (stdlib: StdlibResult) (source: string) : Result, string> = + // Parse user code + match Parser.parseString false source with + | Error err -> Error $"Parse error: {err}" + | Ok userAst -> + // Type check with stdlib environment + match TypeChecking.checkProgramWithBaseEnv stdlib.Context.TypeCheckEnv userAst with + | Error typeErr -> Error (TypeChecking.typeErrorToString typeErr) + | Ok (programType, typedUserAst, _) -> + // Convert to ANF + match convertTypedProgramToUserOnly stdlib.Context typedUserAst with + | Error err -> Error $"ANF conversion error: {err}" + | Ok userOnly -> + let coverageOptions = { defaultOptions with DisableANFOpt = true; DisableInlining = true } + let sw = Stopwatch.StartNew() + let entryFunction = + AST_to_ANF.synthesizeEntryFunction "_start" programType userOnly.MainExpr + let userRegistries : AST_to_ANF.Registries = { + TypeReg = userOnly.TypeReg + VariantLookup = userOnly.VariantLookup + FuncReg = userOnly.FuncReg + FuncParams = userOnly.FuncParams + ModuleRegistry = userOnly.ModuleRegistry + } + match buildAnf 0 coverageOptions sw userRegistries (entryFunction :: userOnly.UserFunctions) None with + | Error err -> Error err + | Ok (userFunctions, _typeMap) -> + match PrintInsertion.insertPrintInEntry "_start" programType userFunctions with + | Error err -> Error $"Print insertion error: {err}" + | Ok printedFunctions -> + let tcoFunctions = applyTco 0 coverageOptions sw printedFunctions None + let reachableStdlibNames = + ANFDeadCodeElimination.getReachableStdlib stdlib.StdlibANFCallGraph tcoFunctions + Ok reachableStdlibNames diff --git a/backend/src/LibCompiler/Crash.fs b/backend/src/LibCompiler/Crash.fs new file mode 100644 index 0000000000..67302813c5 --- /dev/null +++ b/backend/src/LibCompiler/Crash.fs @@ -0,0 +1,18 @@ +// Crash.fs - Dependency-free crash helper +// +// Provides a single crash function for internal invariant violations. + +module Crash + +/// Crash the program with an error message. +/// Used for internal invariant violations (unreachable code). +/// +/// When the compiler is migrated to Darklang (self-hosting), this will +/// be replaced with Darklang's error handling (Result types or similar). +let crash (message: string) : 'a = + failwith message + +/// Crash to mark incomplete work that should never be hit in production. +/// Use this when a developer or AI needs to flag missing logic. +let TODO (message: string) : 'a = + crash $"TODO: {message}" diff --git a/backend/src/LibCompiler/IRPrinter.fs b/backend/src/LibCompiler/IRPrinter.fs new file mode 100644 index 0000000000..acffb3f1a7 --- /dev/null +++ b/backend/src/LibCompiler/IRPrinter.fs @@ -0,0 +1,693 @@ +// IRPrinter.fs - Shared IR pretty printers +// +// Provides pinned formatting for ANF, MIR, LIR, and symbolic LIR output. + +module IRPrinter + +open ANF +open MIR +open LIR + +/// Pretty-print ANF atom +let private prettyPrintANFAtom = function + | ANF.UnitLiteral -> "()" + | ANF.IntLiteral n -> string (ANF.sizedIntToInt64 n) + | ANF.BoolLiteral b -> if b then "true" else "false" + | ANF.StringLiteral s -> $"\"{s}\"" + | ANF.FloatLiteral f -> string f + | ANF.Var (ANF.TempId n) -> $"t{n}" + | ANF.FuncRef name -> $"&{name}" + +/// Pretty-print ANF binary operator +let private prettyPrintANFOp = function + | ANF.Add -> "+" + | ANF.Sub -> "-" + | ANF.Mul -> "*" + | ANF.Div -> "/" + | ANF.Mod -> "%" + | ANF.Shl -> "<<" + | ANF.Shr -> ">>" + | ANF.BitAnd -> "&" + | ANF.BitOr -> "|" + | ANF.BitXor -> "^" + | ANF.Eq -> "==" + | ANF.Neq -> "!=" + | ANF.Lt -> "<" + | ANF.Gt -> ">" + | ANF.Lte -> "<=" + | ANF.Gte -> ">=" + | ANF.And -> "&&" + | ANF.Or -> "||" + +/// Pretty-print ANF unary operator +let private prettyPrintANFUnaryOp = function + | ANF.Neg -> "-" + | ANF.Not -> "!" + | ANF.BitNot -> "~~~" + +let private prettyPrintANFRcKind = function + | ANF.GenericHeap -> "generic" + | ANF.TaggedList -> "list" + +/// Append a type suffix when available +let private appendANFTypeSuffix (typOpt: AST.Type option) (value: string) : string = + match typOpt with + | None -> value + | Some typ -> $"{value} : {typ}" + +/// Pretty-print ANF complex expression +let private prettyPrintANFCExpr = function + | ANF.Atom atom -> prettyPrintANFAtom atom + | ANF.TypedAtom (atom, typ) -> $"{prettyPrintANFAtom atom} : {typ}" + | ANF.Prim (op, left, right) -> + $"{prettyPrintANFAtom left} {prettyPrintANFOp op} {prettyPrintANFAtom right}" + | ANF.UnaryPrim (op, operand) -> + $"{prettyPrintANFUnaryOp op}{prettyPrintANFAtom operand}" + | ANF.Call (funcName, args) -> + let argStr = args |> List.map prettyPrintANFAtom |> String.concat ", " + $"{funcName}({argStr})" + | ANF.BorrowedCall (funcName, args) -> + let argStr = args |> List.map prettyPrintANFAtom |> String.concat ", " + $"borrowed {funcName}({argStr})" + | ANF.IndirectCall (func, args) -> + let argStr = args |> List.map prettyPrintANFAtom |> String.concat ", " + $"IndirectCall({prettyPrintANFAtom func}, [{argStr}])" + | ANF.ClosureAlloc (funcName, captures) -> + let capsStr = captures |> List.map prettyPrintANFAtom |> String.concat ", " + $"ClosureAlloc({funcName}, [{capsStr}])" + | ANF.ClosureCall (closure, args) -> + let argStr = args |> List.map prettyPrintANFAtom |> String.concat ", " + $"ClosureCall({prettyPrintANFAtom closure}, [{argStr}])" + | ANF.IfValue (cond, thenAtom, elseAtom) -> + $"if {prettyPrintANFAtom cond} then {prettyPrintANFAtom thenAtom} else {prettyPrintANFAtom elseAtom}" + | ANF.TupleAlloc elems -> + let elemsStr = elems |> List.map prettyPrintANFAtom |> String.concat ", " + $"({elemsStr})" + | ANF.TupleGet (tupleAtom, index) -> + $"{prettyPrintANFAtom tupleAtom}.{index}" + | ANF.RefCountInc (atom, payloadSize, kind) -> + $"rc_inc({prettyPrintANFAtom atom}, size={payloadSize}, kind={prettyPrintANFRcKind kind})" + | ANF.RefCountDec (atom, payloadSize, kind) -> + $"rc_dec({prettyPrintANFAtom atom}, size={payloadSize}, kind={prettyPrintANFRcKind kind})" + | ANF.StringConcat (left, right) -> + $"{prettyPrintANFAtom left} ++ {prettyPrintANFAtom right}" + | ANF.Print (atom, valueType) -> + $"print({prettyPrintANFAtom atom}, type={valueType})" + | ANF.RuntimeError message -> + $"runtime_error(\"{message}\")" + | ANF.FileReadText path -> + $"FileReadText({prettyPrintANFAtom path})" + | ANF.FileExists path -> + $"FileExists({prettyPrintANFAtom path})" + | ANF.FileWriteText (path, content) -> + $"FileWriteText({prettyPrintANFAtom path}, {prettyPrintANFAtom content})" + | ANF.FileAppendText (path, content) -> + $"FileAppendText({prettyPrintANFAtom path}, {prettyPrintANFAtom content})" + | ANF.FileDelete path -> + $"FileDelete({prettyPrintANFAtom path})" + | ANF.FileSetExecutable path -> + $"FileSetExecutable({prettyPrintANFAtom path})" + | ANF.FileWriteFromPtr (path, ptr, length) -> + $"FileWriteFromPtr({prettyPrintANFAtom path}, {prettyPrintANFAtom ptr}, {prettyPrintANFAtom length})" + | ANF.RawAlloc numBytes -> + $"RawAlloc({prettyPrintANFAtom numBytes})" + | ANF.RawFree ptr -> + $"RawFree({prettyPrintANFAtom ptr})" + | ANF.RawGet (ptr, byteOffset, valueType) -> + let baseText = $"RawGet({prettyPrintANFAtom ptr}, {prettyPrintANFAtom byteOffset})" + appendANFTypeSuffix valueType baseText + | ANF.RawGetByte (ptr, byteOffset) -> + $"RawGetByte({prettyPrintANFAtom ptr}, {prettyPrintANFAtom byteOffset})" + | ANF.RawSet (ptr, byteOffset, value, valueType) -> + let baseText = $"RawSet({prettyPrintANFAtom ptr}, {prettyPrintANFAtom byteOffset}, {prettyPrintANFAtom value})" + appendANFTypeSuffix valueType baseText + | ANF.RawSetByte (ptr, byteOffset, value) -> + $"RawSetByte({prettyPrintANFAtom ptr}, {prettyPrintANFAtom byteOffset}, {prettyPrintANFAtom value})" + | ANF.FloatSqrt atom -> + $"FloatSqrt({prettyPrintANFAtom atom})" + | ANF.FloatAbs atom -> + $"FloatAbs({prettyPrintANFAtom atom})" + | ANF.FloatNeg atom -> + $"FloatNeg({prettyPrintANFAtom atom})" + | ANF.Int64ToFloat atom -> + $"Int64ToFloat({prettyPrintANFAtom atom})" + | ANF.FloatToInt64 atom -> + $"FloatToInt64({prettyPrintANFAtom atom})" + | ANF.FloatToBits atom -> + $"FloatToBits({prettyPrintANFAtom atom})" + | ANF.FloatToString atom -> + $"FloatToString({prettyPrintANFAtom atom})" + | ANF.RefCountIncString str -> + $"RefCountIncString({prettyPrintANFAtom str})" + | ANF.RefCountDecString str -> + $"RefCountDecString({prettyPrintANFAtom str})" + | ANF.RandomInt64 -> + "RandomInt64()" + | ANF.DateNow -> + "DateNow()" + | ANF.TailCall (funcName, args) -> + let argStr = args |> List.map prettyPrintANFAtom |> String.concat ", " + $"TailCall({funcName}, [{argStr}])" + | ANF.IndirectTailCall (func, args) -> + let argStr = args |> List.map prettyPrintANFAtom |> String.concat ", " + $"IndirectTailCall({prettyPrintANFAtom func}, [{argStr}])" + | ANF.ClosureTailCall (closure, args) -> + let argStr = args |> List.map prettyPrintANFAtom |> String.concat ", " + $"ClosureTailCall({prettyPrintANFAtom closure}, [{argStr}])" + +/// Pretty-print ANF expression +let rec private prettyPrintANFExpr = function + | ANF.Return atom -> $"return {prettyPrintANFAtom atom}" + | ANF.Let (var, cexpr, body) -> + let cexprStr = prettyPrintANFCExpr cexpr + let bodyStr = prettyPrintANFExpr body + $"let {var} = {cexprStr}\n{bodyStr}" + | ANF.If (cond, thenBranch, elseBranch) -> + let condStr = prettyPrintANFAtom cond + let thenStr = prettyPrintANFExpr thenBranch + let elseStr = prettyPrintANFExpr elseBranch + $"if {condStr} then\n{thenStr}\nelse\n{elseStr}" + +/// Format ANF program in a pinned format +let formatANF (ANF.Program (functions, mainExpr)) : string = + let funcStrs = + functions + |> List.map (fun func -> + $"Function {func.Name}:\n{prettyPrintANFExpr func.Body}") + |> String.concat "\n\n" + + let mainStr = prettyPrintANFExpr mainExpr + + if List.isEmpty functions then + mainStr + else + funcStrs + "\n\nMain:\n" + mainStr + +/// Pretty-print MIR operand +let private prettyPrintMIROperand = function + | MIR.Int64Const n -> string n + | MIR.BoolConst b -> if b then "true" else "false" + | MIR.FloatSymbol value -> $"float[{value}]" + | MIR.StringSymbol value -> $"str[{value}]" + | MIR.Register (MIR.VReg n) -> $"v{n}" + | MIR.FuncAddr name -> $"&{name}" + +/// Pretty-print MIR operator +let private prettyPrintMIROp = function + | MIR.Add -> "+" + | MIR.Sub -> "-" + | MIR.Mul -> "*" + | MIR.Div -> "/" + | MIR.Mod -> "%" + | MIR.Shl -> "<<" + | MIR.Shr -> ">>" + | MIR.BitAnd -> "&" + | MIR.BitOr -> "|" + | MIR.BitXor -> "^" + | MIR.Eq -> "==" + | MIR.Neq -> "!=" + | MIR.Lt -> "<" + | MIR.Gt -> ">" + | MIR.Lte -> "<=" + | MIR.Gte -> ">=" + | MIR.And -> "&&" + | MIR.Or -> "||" + +/// Pretty-print MIR unary operator +let private prettyPrintMIRUnaryOp = function + | MIR.Neg -> "-" + | MIR.Not -> "!" + | MIR.BitNot -> "~~~" + +let private prettyPrintMIRRcKind = function + | MIR.GenericHeap -> "generic" + | MIR.TaggedList -> "list" + +/// Pretty-print MIR virtual register +let private prettyPrintMIRVReg (MIR.VReg n) : string = + $"v{n}" + +/// Pretty-print MIR label +let private prettyPrintMIRLabel (MIR.Label name) : string = + name + +/// Append a type suffix when available +let private appendTypeSuffix (typOpt: AST.Type option) (value: string) : string = + match typOpt with + | None -> value + | Some typ -> $"{value} : {typ}" + +/// Pretty-print MIR instruction +let private prettyPrintMIRInstr (instr: MIR.Instr) : string = + match instr with + | MIR.Mov (dest, src, valueType) -> + let baseText = $"{prettyPrintMIRVReg dest} <- {prettyPrintMIROperand src}" + appendTypeSuffix valueType baseText + | MIR.BinOp (dest, op, left, right, operandType) -> + $"{prettyPrintMIRVReg dest} <- {prettyPrintMIROperand left} {prettyPrintMIROp op} {prettyPrintMIROperand right} : {operandType}" + | MIR.UnaryOp (dest, op, src) -> + $"{prettyPrintMIRVReg dest} <- {prettyPrintMIRUnaryOp op}{prettyPrintMIROperand src}" + | MIR.Call (dest, funcName, args, _, _) -> + let argStr = args |> List.map prettyPrintMIROperand |> String.concat ", " + $"{prettyPrintMIRVReg dest} <- Call({funcName}, [{argStr}])" + | MIR.TailCall (funcName, args, _, _) -> + let argStr = args |> List.map prettyPrintMIROperand |> String.concat ", " + $"TailCall({funcName}, [{argStr}])" + | MIR.IndirectCall (dest, func, args, _, _) -> + let argStr = args |> List.map prettyPrintMIROperand |> String.concat ", " + $"{prettyPrintMIRVReg dest} <- IndirectCall({prettyPrintMIROperand func}, [{argStr}])" + | MIR.IndirectTailCall (func, args, _, _) -> + let argStr = args |> List.map prettyPrintMIROperand |> String.concat ", " + $"IndirectTailCall({prettyPrintMIROperand func}, [{argStr}])" + | MIR.ClosureAlloc (dest, funcName, captures) -> + let capsStr = captures |> List.map prettyPrintMIROperand |> String.concat ", " + $"{prettyPrintMIRVReg dest} <- ClosureAlloc({funcName}, [{capsStr}])" + | MIR.ClosureCall (dest, closure, args, _, _) -> + let argStr = args |> List.map prettyPrintMIROperand |> String.concat ", " + $"{prettyPrintMIRVReg dest} <- ClosureCall({prettyPrintMIROperand closure}, [{argStr}])" + | MIR.ClosureTailCall (closure, args, _) -> + let argStr = args |> List.map prettyPrintMIROperand |> String.concat ", " + $"ClosureTailCall({prettyPrintMIROperand closure}, [{argStr}])" + | MIR.HeapAlloc (dest, sizeBytes) -> + $"{prettyPrintMIRVReg dest} <- HeapAlloc({sizeBytes})" + | MIR.HeapStore (addr, offset, src, valueType) -> + let baseText = $"HeapStore({prettyPrintMIRVReg addr}, {offset}, {prettyPrintMIROperand src})" + appendTypeSuffix valueType baseText + | MIR.HeapLoad (dest, addr, offset, valueType) -> + let baseText = $"{prettyPrintMIRVReg dest} <- HeapLoad({prettyPrintMIRVReg addr}, {offset})" + appendTypeSuffix valueType baseText + | MIR.StringConcat (dest, left, right) -> + $"{prettyPrintMIRVReg dest} <- StringConcat({prettyPrintMIROperand left}, {prettyPrintMIROperand right})" + | MIR.RefCountInc (addr, payloadSize, kind) -> + $"RefCountInc({prettyPrintMIRVReg addr}, size={payloadSize}, kind={prettyPrintMIRRcKind kind})" + | MIR.RefCountDec (addr, payloadSize, kind) -> + $"RefCountDec({prettyPrintMIRVReg addr}, size={payloadSize}, kind={prettyPrintMIRRcKind kind})" + | MIR.Print (src, valueType) -> + $"Print({prettyPrintMIROperand src}, type={valueType})" + | MIR.RuntimeError message -> + $"RuntimeError(\"{message}\")" + | MIR.FileReadText (dest, path) -> + $"{prettyPrintMIRVReg dest} <- FileReadText({prettyPrintMIROperand path})" + | MIR.FileExists (dest, path) -> + $"{prettyPrintMIRVReg dest} <- FileExists({prettyPrintMIROperand path})" + | MIR.FileWriteText (dest, path, content) -> + $"{prettyPrintMIRVReg dest} <- FileWriteText({prettyPrintMIROperand path}, {prettyPrintMIROperand content})" + | MIR.FileAppendText (dest, path, content) -> + $"{prettyPrintMIRVReg dest} <- FileAppendText({prettyPrintMIROperand path}, {prettyPrintMIROperand content})" + | MIR.FileDelete (dest, path) -> + $"{prettyPrintMIRVReg dest} <- FileDelete({prettyPrintMIROperand path})" + | MIR.FileSetExecutable (dest, path) -> + $"{prettyPrintMIRVReg dest} <- FileSetExecutable({prettyPrintMIROperand path})" + | MIR.FileWriteFromPtr (dest, path, ptr, length) -> + $"{prettyPrintMIRVReg dest} <- FileWriteFromPtr({prettyPrintMIROperand path}, {prettyPrintMIROperand ptr}, {prettyPrintMIROperand length})" + | MIR.FloatSqrt (dest, src) -> + $"{prettyPrintMIRVReg dest} <- FloatSqrt({prettyPrintMIROperand src})" + | MIR.FloatAbs (dest, src) -> + $"{prettyPrintMIRVReg dest} <- FloatAbs({prettyPrintMIROperand src})" + | MIR.FloatNeg (dest, src) -> + $"{prettyPrintMIRVReg dest} <- FloatNeg({prettyPrintMIROperand src})" + | MIR.Int64ToFloat (dest, src) -> + $"{prettyPrintMIRVReg dest} <- Int64ToFloat({prettyPrintMIROperand src})" + | MIR.FloatToInt64 (dest, src) -> + $"{prettyPrintMIRVReg dest} <- FloatToInt64({prettyPrintMIROperand src})" + | MIR.FloatToBits (dest, src) -> + $"{prettyPrintMIRVReg dest} <- FloatToBits({prettyPrintMIROperand src})" + | MIR.RawAlloc (dest, numBytes) -> + $"{prettyPrintMIRVReg dest} <- RawAlloc({prettyPrintMIROperand numBytes})" + | MIR.RawFree ptr -> + $"RawFree({prettyPrintMIROperand ptr})" + | MIR.RawGet (dest, ptr, byteOffset, valueType) -> + let baseText = $"{prettyPrintMIRVReg dest} <- RawGet({prettyPrintMIROperand ptr}, {prettyPrintMIROperand byteOffset})" + appendTypeSuffix valueType baseText + | MIR.RawGetByte (dest, ptr, byteOffset) -> + $"{prettyPrintMIRVReg dest} <- RawGetByte({prettyPrintMIROperand ptr}, {prettyPrintMIROperand byteOffset})" + | MIR.RawSet (ptr, byteOffset, value, valueType) -> + let baseText = $"RawSet({prettyPrintMIROperand ptr}, {prettyPrintMIROperand byteOffset}, {prettyPrintMIROperand value})" + appendTypeSuffix valueType baseText + | MIR.RawSetByte (ptr, byteOffset, value) -> + $"RawSetByte({prettyPrintMIROperand ptr}, {prettyPrintMIROperand byteOffset}, {prettyPrintMIROperand value})" + | MIR.RefCountIncString str -> + $"RefCountIncString({prettyPrintMIROperand str})" + | MIR.RefCountDecString str -> + $"RefCountDecString({prettyPrintMIROperand str})" + | MIR.RandomInt64 dest -> + $"{prettyPrintMIRVReg dest} <- RandomInt64()" + | MIR.DateNow dest -> + $"{prettyPrintMIRVReg dest} <- DateNow()" + | MIR.FloatToString (dest, value) -> + $"{prettyPrintMIRVReg dest} <- FloatToString({prettyPrintMIROperand value})" + | MIR.Phi (dest, sources, valueType) -> + let srcStrs = + sources + |> List.map (fun (operand, label) -> $"({prettyPrintMIROperand operand}, {prettyPrintMIRLabel label})") + |> String.concat ", " + let baseText = $"{prettyPrintMIRVReg dest} <- Phi([{srcStrs}])" + appendTypeSuffix valueType baseText + | MIR.CoverageHit exprId -> + $"CoverageHit({exprId})" + +/// Pretty-print MIR terminator +let private prettyPrintMIRTerminator (term: MIR.Terminator) : string = + match term with + | MIR.Ret operand -> $"ret {prettyPrintMIROperand operand}" + | MIR.Branch (cond, trueLabel, falseLabel) -> + $"branch {prettyPrintMIROperand cond} ? {prettyPrintMIRLabel trueLabel} : {prettyPrintMIRLabel falseLabel}" + | MIR.Jump label -> $"jump {prettyPrintMIRLabel label}" + +/// Format MIR program with CFG structure +let formatMIR (program: MIR.Program) : string = + let (MIR.Program (functions, _, _)) = program + let prettyPrintBlock (block: MIR.BasicBlock) = + let labelLine = $" {prettyPrintMIRLabel block.Label}:" + let instrLines = block.Instrs |> List.map prettyPrintMIRInstr |> List.map (fun line -> $" {line}") + let termLine = $" {prettyPrintMIRTerminator block.Terminator}" + String.concat "\n" (labelLine :: instrLines @ [termLine]) + + let prettyPrintFunction (func: MIR.Function) = + let entryLabel = func.CFG.Entry + let entryBlock = + Map.tryFind entryLabel func.CFG.Blocks + |> Option.map (fun block -> (entryLabel, block)) + let otherBlocks = + func.CFG.Blocks + |> Map.remove entryLabel + |> Map.toList + |> List.sortBy (fun (label, _) -> prettyPrintMIRLabel label) + let orderedBlocks = + match entryBlock with + | Some block -> block :: otherBlocks + | None -> otherBlocks + let blockLines = + orderedBlocks + |> List.map (fun (_, block) -> prettyPrintBlock block) + |> String.concat "\n" + if blockLines = "" then + $"Function {func.Name}:\n " + else + $"Function {func.Name}:\n{blockLines}" + + functions + |> List.map prettyPrintFunction + |> String.concat "\n\n" + +/// Pretty-print LIR physical register +let private prettyPrintLIRPhysReg = function + | LIR.X0 -> "X0" | LIR.X1 -> "X1" | LIR.X2 -> "X2" | LIR.X3 -> "X3" + | LIR.X4 -> "X4" | LIR.X5 -> "X5" | LIR.X6 -> "X6" | LIR.X7 -> "X7" + | LIR.X8 -> "X8" | LIR.X9 -> "X9" | LIR.X10 -> "X10" | LIR.X11 -> "X11" + | LIR.X12 -> "X12" | LIR.X13 -> "X13" | LIR.X14 -> "X14" | LIR.X15 -> "X15" + | LIR.X16 -> "X16" | LIR.X17 -> "X17" + | LIR.X19 -> "X19" | LIR.X20 -> "X20" | LIR.X21 -> "X21" | LIR.X22 -> "X22" + | LIR.X23 -> "X23" | LIR.X24 -> "X24" | LIR.X25 -> "X25" | LIR.X26 -> "X26" + | LIR.X27 -> "X27" + | LIR.X29 -> "X29" | LIR.X30 -> "X30" | LIR.SP -> "SP" + +/// Pretty-print LIR register +let private prettyPrintLIRReg = function + | LIR.Physical pr -> prettyPrintLIRPhysReg pr + | LIR.Virtual n -> $"v{n}" + +/// Pretty-print LIR FP physical register +let private prettyPrintLIRPhysFPReg = function + | LIR.D0 -> "D0" | LIR.D1 -> "D1" | LIR.D2 -> "D2" | LIR.D3 -> "D3" + | LIR.D4 -> "D4" | LIR.D5 -> "D5" | LIR.D6 -> "D6" | LIR.D7 -> "D7" + | LIR.D8 -> "D8" | LIR.D9 -> "D9" | LIR.D10 -> "D10" | LIR.D11 -> "D11" + | LIR.D12 -> "D12" | LIR.D13 -> "D13" | LIR.D14 -> "D14" | LIR.D15 -> "D15" + +/// Pretty-print LIR FP register +let private prettyPrintLIRFReg = function + | LIR.FPhysical pr -> prettyPrintLIRPhysFPReg pr + | LIR.FVirtual n -> $"fv{n}" + +/// Pretty-print LIR operand +let private prettyPrintLIROperand = function + | LIR.Imm n -> $"Imm {n}" + | LIR.FloatImm f -> $"FloatImm {f}" + | LIR.Reg reg -> $"Reg {prettyPrintLIRReg reg}" + | LIR.StackSlot n -> $"Stack {n}" + | LIR.StringSymbol value -> $"str[{value}]" + | LIR.FloatSymbol value -> $"float[{value}]" + | LIR.FuncAddr name -> $"&{name}" + +let private prettyPrintLIRRcKind = function + | LIR.GenericHeap -> "generic" + | LIR.TaggedList -> "list" + +/// Pretty-print LIR instruction +let private prettyPrintLIRInstr (instr: LIR.Instr) : string = + match instr with + | LIR.Mov (dest, src) -> + $"{prettyPrintLIRReg dest} <- Mov({prettyPrintLIROperand src})" + | LIR.Phi (dest, sources, _) -> + let srcs = sources |> List.map (fun (op, LIR.Label lbl) -> $"({prettyPrintLIROperand op}, {lbl})") |> String.concat ", " + $"{prettyPrintLIRReg dest} <- Phi([{srcs}])" + | LIR.FPhi (dest, sources) -> + let srcs = sources |> List.map (fun (freg, LIR.Label lbl) -> $"({prettyPrintLIRFReg freg}, {lbl})") |> String.concat ", " + $"{prettyPrintLIRFReg dest} <- FPhi([{srcs}])" + | LIR.Store (offset, src) -> + $"Store(Stack {offset}, {prettyPrintLIRReg src})" + | LIR.Add (dest, left, right) -> + $"{prettyPrintLIRReg dest} <- Add({prettyPrintLIRReg left}, {prettyPrintLIROperand right})" + | LIR.Sub (dest, left, right) -> + $"{prettyPrintLIRReg dest} <- Sub({prettyPrintLIRReg left}, {prettyPrintLIROperand right})" + | LIR.Mul (dest, left, right) -> + $"{prettyPrintLIRReg dest} <- Mul({prettyPrintLIRReg left}, Reg {prettyPrintLIRReg right})" + | LIR.Sdiv (dest, left, right) -> + $"{prettyPrintLIRReg dest} <- Sdiv({prettyPrintLIRReg left}, Reg {prettyPrintLIRReg right})" + | LIR.Msub (dest, mulLeft, mulRight, sub) -> + $"{prettyPrintLIRReg dest} <- Msub({prettyPrintLIRReg mulLeft}, {prettyPrintLIRReg mulRight}, {prettyPrintLIRReg sub})" + | LIR.Madd (dest, mulLeft, mulRight, add) -> + $"{prettyPrintLIRReg dest} <- Madd({prettyPrintLIRReg mulLeft}, {prettyPrintLIRReg mulRight}, {prettyPrintLIRReg add})" + | LIR.Cmp (left, right) -> + $"Cmp({prettyPrintLIRReg left}, {prettyPrintLIROperand right})" + | LIR.Cset (dest, cond) -> + $"{prettyPrintLIRReg dest} <- Cset({cond})" + | LIR.And (dest, left, right) -> + $"{prettyPrintLIRReg dest} <- And({prettyPrintLIRReg left}, {prettyPrintLIRReg right})" + | LIR.And_imm (dest, src, imm) -> + $"{prettyPrintLIRReg dest} <- And_imm({prettyPrintLIRReg src}, #{imm})" + | LIR.Orr (dest, left, right) -> + $"{prettyPrintLIRReg dest} <- Orr({prettyPrintLIRReg left}, {prettyPrintLIRReg right})" + | LIR.Eor (dest, left, right) -> + $"{prettyPrintLIRReg dest} <- Eor({prettyPrintLIRReg left}, {prettyPrintLIRReg right})" + | LIR.Lsl (dest, src, shift) -> + $"{prettyPrintLIRReg dest} <- Lsl({prettyPrintLIRReg src}, {prettyPrintLIRReg shift})" + | LIR.Lsr (dest, src, shift) -> + $"{prettyPrintLIRReg dest} <- Lsr({prettyPrintLIRReg src}, {prettyPrintLIRReg shift})" + | LIR.Lsl_imm (dest, src, shift) -> + $"{prettyPrintLIRReg dest} <- Lsl_imm({prettyPrintLIRReg src}, #{shift})" + | LIR.Lsr_imm (dest, src, shift) -> + $"{prettyPrintLIRReg dest} <- Lsr_imm({prettyPrintLIRReg src}, #{shift})" + | LIR.Mvn (dest, src) -> + $"{prettyPrintLIRReg dest} <- Mvn({prettyPrintLIRReg src})" + | LIR.Sxtb (dest, src) -> + $"{prettyPrintLIRReg dest} <- Sxtb({prettyPrintLIRReg src})" + | LIR.Sxth (dest, src) -> + $"{prettyPrintLIRReg dest} <- Sxth({prettyPrintLIRReg src})" + | LIR.Sxtw (dest, src) -> + $"{prettyPrintLIRReg dest} <- Sxtw({prettyPrintLIRReg src})" + | LIR.Uxtb (dest, src) -> + $"{prettyPrintLIRReg dest} <- Uxtb({prettyPrintLIRReg src})" + | LIR.Uxth (dest, src) -> + $"{prettyPrintLIRReg dest} <- Uxth({prettyPrintLIRReg src})" + | LIR.Uxtw (dest, src) -> + $"{prettyPrintLIRReg dest} <- Uxtw({prettyPrintLIRReg src})" + | LIR.Call (dest, funcName, args) -> + let argStr = args |> List.map prettyPrintLIROperand |> String.concat ", " + $"{prettyPrintLIRReg dest} <- Call({funcName}, [{argStr}])" + | LIR.TailCall (funcName, args) -> + let argStr = args |> List.map prettyPrintLIROperand |> String.concat ", " + $"TailCall({funcName}, [{argStr}])" + | LIR.IndirectCall (dest, func, args) -> + let argStr = args |> List.map prettyPrintLIROperand |> String.concat ", " + $"{prettyPrintLIRReg dest} <- IndirectCall({prettyPrintLIRReg func}, [{argStr}])" + | LIR.IndirectTailCall (func, args) -> + let argStr = args |> List.map prettyPrintLIROperand |> String.concat ", " + $"IndirectTailCall({prettyPrintLIRReg func}, [{argStr}])" + | LIR.ClosureAlloc (dest, funcName, captures) -> + let capsStr = captures |> List.map prettyPrintLIROperand |> String.concat ", " + $"{prettyPrintLIRReg dest} <- ClosureAlloc({funcName}, [{capsStr}])" + | LIR.ClosureCall (dest, closure, args) -> + let argStr = args |> List.map prettyPrintLIROperand |> String.concat ", " + $"{prettyPrintLIRReg dest} <- ClosureCall({prettyPrintLIRReg closure}, [{argStr}])" + | LIR.ClosureTailCall (closure, args) -> + let argStr = args |> List.map prettyPrintLIROperand |> String.concat ", " + $"ClosureTailCall({prettyPrintLIRReg closure}, [{argStr}])" + | LIR.SaveRegs (intRegs, floatRegs) -> + let intStr = intRegs |> List.map (sprintf "%A") |> String.concat ", " + let floatStr = floatRegs |> List.map (sprintf "%A") |> String.concat ", " + $"SaveRegs([{intStr}], [{floatStr}])" + | LIR.RestoreRegs (intRegs, floatRegs) -> + let intStr = intRegs |> List.map (sprintf "%A") |> String.concat ", " + let floatStr = floatRegs |> List.map (sprintf "%A") |> String.concat ", " + $"RestoreRegs([{intStr}], [{floatStr}])" + | LIR.ArgMoves moves -> + let moveStrs = moves |> List.map (fun (dest, src) -> sprintf "%A <- %s" dest (prettyPrintLIROperand src)) + sprintf "ArgMoves(%s)" (String.concat ", " moveStrs) + | LIR.TailArgMoves moves -> + let moveStrs = moves |> List.map (fun (dest, src) -> sprintf "%A <- %s" dest (prettyPrintLIROperand src)) + sprintf "TailArgMoves(%s)" (String.concat ", " moveStrs) + | LIR.FArgMoves moves -> + let moveStrs = moves |> List.map (fun (dest, src) -> sprintf "%A <- %s" dest (prettyPrintLIRFReg src)) + sprintf "FArgMoves(%s)" (String.concat ", " moveStrs) + | LIR.PrintInt64 reg -> + $"PrintInt64({prettyPrintLIRReg reg})" + | LIR.PrintBool reg -> + $"PrintBool({prettyPrintLIRReg reg})" + | LIR.PrintFloat freg -> + $"PrintFloat({prettyPrintLIRFReg freg})" + | LIR.PrintString value -> + $"PrintString(str[{value}], len={value.Length})" + | LIR.RuntimeError message -> + $"RuntimeError(\"{message}\")" + | LIR.PrintChars chars -> + let s = chars |> List.map (fun b -> char b) |> System.String.Concat + $"PrintChars(\"{s}\")" + | LIR.PrintBytes reg -> + $"PrintBytes({prettyPrintLIRReg reg})" + | LIR.PrintInt64NoNewline reg -> + $"PrintIntNoNewline({prettyPrintLIRReg reg})" + | LIR.PrintBoolNoNewline reg -> + $"PrintBoolNoNewline({prettyPrintLIRReg reg})" + | LIR.PrintFloatNoNewline freg -> + $"PrintFloatNoNewline({prettyPrintLIRFReg freg})" + | LIR.PrintHeapStringNoNewline reg -> + $"PrintHeapStringNoNewline({prettyPrintLIRReg reg})" + | LIR.PrintList (listPtr, elemType) -> + $"PrintList({prettyPrintLIRReg listPtr}, {elemType})" + | LIR.PrintSum (sumPtr, variants) -> + $"PrintSum({prettyPrintLIRReg sumPtr}, {variants})" + | LIR.PrintRecord (recordPtr, typeName, fields) -> + $"PrintRecord({prettyPrintLIRReg recordPtr}, {typeName}, {fields})" + | LIR.Exit -> "Exit" + | LIR.FMov (dest, src) -> + $"{prettyPrintLIRFReg dest} <- FMov({prettyPrintLIRFReg src})" + | LIR.FLoad (dest, value) -> + $"{prettyPrintLIRFReg dest} <- FLoad(float[{value}])" + | LIR.FAdd (dest, left, right) -> + $"{prettyPrintLIRFReg dest} <- FAdd({prettyPrintLIRFReg left}, {prettyPrintLIRFReg right})" + | LIR.FSub (dest, left, right) -> + $"{prettyPrintLIRFReg dest} <- FSub({prettyPrintLIRFReg left}, {prettyPrintLIRFReg right})" + | LIR.FMul (dest, left, right) -> + $"{prettyPrintLIRFReg dest} <- FMul({prettyPrintLIRFReg left}, {prettyPrintLIRFReg right})" + | LIR.FDiv (dest, left, right) -> + $"{prettyPrintLIRFReg dest} <- FDiv({prettyPrintLIRFReg left}, {prettyPrintLIRFReg right})" + | LIR.FNeg (dest, src) -> + $"{prettyPrintLIRFReg dest} <- FNeg({prettyPrintLIRFReg src})" + | LIR.FAbs (dest, src) -> + $"{prettyPrintLIRFReg dest} <- FAbs({prettyPrintLIRFReg src})" + | LIR.FSqrt (dest, src) -> + $"{prettyPrintLIRFReg dest} <- FSqrt({prettyPrintLIRFReg src})" + | LIR.FCmp (left, right) -> + $"FCmp({prettyPrintLIRFReg left}, {prettyPrintLIRFReg right})" + | LIR.Int64ToFloat (dest, src) -> + $"{prettyPrintLIRFReg dest} <- Int64ToFloat({prettyPrintLIRReg src})" + | LIR.FloatToInt64 (dest, src) -> + $"{prettyPrintLIRReg dest} <- FloatToInt64({prettyPrintLIRFReg src})" + | LIR.FloatToBits (dest, src) -> + $"{prettyPrintLIRReg dest} <- FloatToBits({prettyPrintLIRFReg src})" + | LIR.GpToFp (dest, src) -> + $"{prettyPrintLIRFReg dest} <- GpToFp({prettyPrintLIRReg src})" + | LIR.FpToGp (dest, src) -> + $"{prettyPrintLIRReg dest} <- FpToGp({prettyPrintLIRFReg src})" + | LIR.HeapAlloc (dest, sizeBytes) -> + $"{prettyPrintLIRReg dest} <- HeapAlloc({sizeBytes})" + | LIR.HeapStore (addr, offset, src, _valueType) -> + $"HeapStore({prettyPrintLIRReg addr}, {offset}, {prettyPrintLIROperand src})" + | LIR.HeapLoad (dest, addr, offset) -> + $"{prettyPrintLIRReg dest} <- HeapLoad({prettyPrintLIRReg addr}, {offset})" + | LIR.RefCountInc (addr, payloadSize, kind) -> + $"RefCountInc({prettyPrintLIRReg addr}, {payloadSize}, {prettyPrintLIRRcKind kind})" + | LIR.RefCountDec (addr, payloadSize, kind) -> + $"RefCountDec({prettyPrintLIRReg addr}, {payloadSize}, {prettyPrintLIRRcKind kind})" + | LIR.StringConcat (dest, left, right) -> + $"{prettyPrintLIRReg dest} <- StringConcat({prettyPrintLIROperand left}, {prettyPrintLIROperand right})" + | LIR.PrintHeapString reg -> + $"PrintHeapString({prettyPrintLIRReg reg})" + | LIR.LoadFuncAddr (dest, funcName) -> + $"{prettyPrintLIRReg dest} <- LoadFuncAddr({funcName})" + | LIR.FileReadText (dest, path) -> + $"{prettyPrintLIRReg dest} <- FileReadText({prettyPrintLIROperand path})" + | LIR.FileExists (dest, path) -> + $"{prettyPrintLIRReg dest} <- FileExists({prettyPrintLIROperand path})" + | LIR.FileWriteText (dest, path, content) -> + $"{prettyPrintLIRReg dest} <- FileWriteText({prettyPrintLIROperand path}, {prettyPrintLIROperand content})" + | LIR.FileAppendText (dest, path, content) -> + $"{prettyPrintLIRReg dest} <- FileAppendText({prettyPrintLIROperand path}, {prettyPrintLIROperand content})" + | LIR.FileDelete (dest, path) -> + $"{prettyPrintLIRReg dest} <- FileDelete({prettyPrintLIROperand path})" + | LIR.FileSetExecutable (dest, path) -> + $"{prettyPrintLIRReg dest} <- FileSetExecutable({prettyPrintLIROperand path})" + | LIR.FileWriteFromPtr (dest, path, ptr, length) -> + $"{prettyPrintLIRReg dest} <- FileWriteFromPtr({prettyPrintLIROperand path}, {prettyPrintLIRReg ptr}, {prettyPrintLIRReg length})" + | LIR.RawAlloc (dest, numBytes) -> + $"{prettyPrintLIRReg dest} <- RawAlloc({prettyPrintLIRReg numBytes})" + | LIR.RawFree ptr -> + $"RawFree({prettyPrintLIRReg ptr})" + | LIR.RawGet (dest, ptr, byteOffset) -> + $"{prettyPrintLIRReg dest} <- RawGet({prettyPrintLIRReg ptr}, {prettyPrintLIRReg byteOffset})" + | LIR.RawGetByte (dest, ptr, byteOffset) -> + $"{prettyPrintLIRReg dest} <- RawGetByte({prettyPrintLIRReg ptr}, {prettyPrintLIRReg byteOffset})" + | LIR.RawSet (ptr, byteOffset, value, valueType) -> + let baseText = $"RawSet({prettyPrintLIRReg ptr}, {prettyPrintLIRReg byteOffset}, {prettyPrintLIRReg value})" + match valueType with + | Some typ -> $"{baseText} : {typ}" + | None -> baseText + | LIR.RawSetByte (ptr, byteOffset, value) -> + $"RawSetByte({prettyPrintLIRReg ptr}, {prettyPrintLIRReg byteOffset}, {prettyPrintLIRReg value})" + | LIR.RefCountIncString str -> + $"RefCountIncString({prettyPrintLIROperand str})" + | LIR.RefCountDecString str -> + $"RefCountDecString({prettyPrintLIROperand str})" + | LIR.RandomInt64 dest -> + $"{prettyPrintLIRReg dest} <- RandomInt64()" + | LIR.DateNow dest -> + $"{prettyPrintLIRReg dest} <- DateNow()" + | LIR.FloatToString (dest, value) -> + $"{prettyPrintLIRReg dest} <- FloatToString({prettyPrintLIRFReg value})" + | LIR.CoverageHit exprId -> + $"CoverageHit({exprId})" + +/// Pretty-print symbolic LIR terminator +let private prettyPrintLIRTerminator (term: LIR.Terminator) : string = + match term with + | LIR.Ret -> "Ret" + | LIR.Branch (cond, trueLabel, falseLabel) -> + $"Branch({prettyPrintLIRReg cond}, {trueLabel}, {falseLabel})" + | LIR.BranchZero (cond, zeroLabel, nonZeroLabel) -> + $"BranchZero({prettyPrintLIRReg cond}, {zeroLabel}, {nonZeroLabel})" + | LIR.BranchBitZero (reg, bit, zeroLabel, nonZeroLabel) -> + $"BranchBitZero({prettyPrintLIRReg reg}, #{bit}, {zeroLabel}, {nonZeroLabel})" + | LIR.BranchBitNonZero (reg, bit, nonZeroLabel, zeroLabel) -> + $"BranchBitNonZero({prettyPrintLIRReg reg}, #{bit}, {nonZeroLabel}, {zeroLabel})" + | LIR.CondBranch (cond, trueLabel, falseLabel) -> + $"CondBranch({cond}, {trueLabel}, {falseLabel})" + | LIR.Jump label -> $"Jump({label})" + +/// Format symbolic LIR program with CFG structure +let formatLIR (LIR.Program functions) : string = + let prettyPrintCalleeSaved (regs: LIR.PhysReg list) : string = + regs + |> List.map prettyPrintLIRPhysReg + |> String.concat ", " + + let funcStrs = + functions + |> List.map (fun func -> + let blockStrs = + func.CFG.Blocks + |> Map.toList + |> List.sortBy fst + |> List.map (fun (label, block) -> + let instrStrs = + block.Instrs + |> List.map prettyPrintLIRInstr + |> List.map (sprintf " %s") + |> String.concat "\n" + let termStr = sprintf " %s" (prettyPrintLIRTerminator block.Terminator) + $" {label}:\n{instrStrs}\n{termStr}") + |> String.concat "\n" + let calleeSavedText = prettyPrintCalleeSaved func.UsedCalleeSaved + $"{func.Name}:\n StackSize: {func.StackSize}\n UsedCalleeSaved: [{calleeSavedText}]\n{blockStrs}") + |> String.concat "\n\n" + funcStrs diff --git a/backend/src/LibCompiler/LIR.fs b/backend/src/LibCompiler/LIR.fs new file mode 100644 index 0000000000..7963ea5eb2 --- /dev/null +++ b/backend/src/LibCompiler/LIR.fs @@ -0,0 +1,206 @@ +// LIR.fs - Symbolic Low-level Intermediate Representation +// +// Defines the LIR (Low-level IR) data structures with symbolic literals. +// Strings and floats are stored by value so pools are resolved late in emission. + +module LIR + +/// ARM64 general-purpose registers +/// X16/X17 are IP0/IP1 scratch registers, X27/X28 are reserved for runtime state. +type PhysReg = + | X0 | X1 | X2 | X3 | X4 | X5 | X6 | X7 | X8 | X9 + | X10 | X11 | X12 | X13 | X14 | X15 | X16 | X17 + | X19 | X20 | X21 | X22 | X23 | X24 | X25 | X26 | X27 + | X29 + | X30 + | SP + +/// ARM64 floating-point registers +/// D0-D7 are caller-saved, D8-D15 are callee-saved. +type PhysFPReg = + | D0 | D1 | D2 | D3 | D4 | D5 | D6 | D7 + | D8 | D9 | D10 | D11 | D12 | D13 | D14 | D15 + +/// Register or virtual register (before allocation) +type Reg = + | Physical of PhysReg + | Virtual of int + +/// Floating-point register or virtual FP register (before allocation) +type FReg = + | FPhysical of PhysFPReg + | FVirtual of int + +/// Parameter with register and type bundled (makes invalid states unrepresentable) +type TypedLIRParam = { Reg: Reg; Type: AST.Type } + +/// Operands (symbolic string/float references) +type Operand = + | Imm of int64 + | FloatImm of float + | Reg of Reg + | StackSlot of int + | StringSymbol of string + | FloatSymbol of float + | FuncAddr of string + +/// Comparison conditions (for CSET) +type Condition = + | EQ + | NE + | LT + | GT + | LE + | GE + +/// Reference-count operation kind +type RcKind = + | GenericHeap + | TaggedList + +/// Basic block label (wrapper type for type safety) +type Label = Label of string + +/// Instructions (symbolic) +type Instr = + | Mov of dest:Reg * src:Operand + | Phi of dest:Reg * sources:(Operand * Label) list * valueType:AST.Type option + | Store of stackSlot:int * src:Reg + | Add of dest:Reg * left:Reg * right:Operand + | Sub of dest:Reg * left:Reg * right:Operand + | Mul of dest:Reg * left:Reg * right:Reg + | Sdiv of dest:Reg * left:Reg * right:Reg + | Msub of dest:Reg * mulLeft:Reg * mulRight:Reg * sub:Reg + | Madd of dest:Reg * mulLeft:Reg * mulRight:Reg * add:Reg + | Cmp of left:Reg * right:Operand + | Cset of dest:Reg * cond:Condition + | And of dest:Reg * left:Reg * right:Reg + | And_imm of dest:Reg * src:Reg * imm:int64 + | Orr of dest:Reg * left:Reg * right:Reg + | Eor of dest:Reg * left:Reg * right:Reg + | Lsl of dest:Reg * src:Reg * shift:Reg + | Lsr of dest:Reg * src:Reg * shift:Reg + | Lsl_imm of dest:Reg * src:Reg * shift:int + | Lsr_imm of dest:Reg * src:Reg * shift:int + | Mvn of dest:Reg * src:Reg + | Sxtb of dest:Reg * src:Reg + | Sxth of dest:Reg * src:Reg + | Sxtw of dest:Reg * src:Reg + | Uxtb of dest:Reg * src:Reg + | Uxth of dest:Reg * src:Reg + | Uxtw of dest:Reg * src:Reg + | Call of dest:Reg * funcName:string * args:Operand list + | TailCall of funcName:string * args:Operand list + | IndirectCall of dest:Reg * func:Reg * args:Operand list + | IndirectTailCall of func:Reg * args:Operand list + | ClosureAlloc of dest:Reg * funcName:string * captures:Operand list + | ClosureCall of dest:Reg * closure:Reg * args:Operand list + | ClosureTailCall of closure:Reg * args:Operand list + | SaveRegs of intRegs:PhysReg list * floatRegs:PhysFPReg list + | RestoreRegs of intRegs:PhysReg list * floatRegs:PhysFPReg list + | ArgMoves of (PhysReg * Operand) list + | TailArgMoves of (PhysReg * Operand) list + | FArgMoves of (PhysFPReg * FReg) list + | PrintInt64 of Reg + | PrintBool of Reg + | PrintInt64NoNewline of Reg + | PrintBoolNoNewline of Reg + | PrintFloat of FReg + | PrintFloatNoNewline of FReg + | PrintString of string + | RuntimeError of string + | PrintHeapStringNoNewline of Reg + | PrintChars of byte list + | PrintBytes of Reg + | PrintList of listPtr:Reg * elemType:AST.Type + | PrintSum of sumPtr:Reg * variants:(string * int * AST.Type option) list + | PrintRecord of recordPtr:Reg * typeName:string * fields:(string * AST.Type) list + | Exit + | FPhi of dest:FReg * sources:(FReg * Label) list + | FMov of dest:FReg * src:FReg + | FLoad of dest:FReg * floatValue:float + | FAdd of dest:FReg * left:FReg * right:FReg + | FSub of dest:FReg * left:FReg * right:FReg + | FMul of dest:FReg * left:FReg * right:FReg + | FDiv of dest:FReg * left:FReg * right:FReg + | FNeg of dest:FReg * src:FReg + | FAbs of dest:FReg * src:FReg + | FSqrt of dest:FReg * src:FReg + | FCmp of left:FReg * right:FReg + | Int64ToFloat of dest:FReg * src:Reg + | FloatToInt64 of dest:Reg * src:FReg + | FloatToBits of dest:Reg * src:FReg + | GpToFp of dest:FReg * src:Reg + | FpToGp of dest:Reg * src:FReg + | HeapAlloc of dest:Reg * sizeBytes:int + | HeapStore of addr:Reg * offset:int * src:Operand * valueType:AST.Type option + | HeapLoad of dest:Reg * addr:Reg * offset:int + | RefCountInc of addr:Reg * payloadSize:int * kind:RcKind + | RefCountDec of addr:Reg * payloadSize:int * kind:RcKind + | StringConcat of dest:Reg * left:Operand * right:Operand + | PrintHeapString of Reg + | LoadFuncAddr of dest:Reg * funcName:string + | FileReadText of dest:Reg * path:Operand + | FileExists of dest:Reg * path:Operand + | FileWriteText of dest:Reg * path:Operand * content:Operand + | FileAppendText of dest:Reg * path:Operand * content:Operand + | FileDelete of dest:Reg * path:Operand + | FileSetExecutable of dest:Reg * path:Operand + | FileWriteFromPtr of dest:Reg * path:Operand * ptr:Reg * length:Reg + | RawAlloc of dest:Reg * numBytes:Reg + | RawFree of ptr:Reg + | RawGet of dest:Reg * ptr:Reg * byteOffset:Reg + | RawGetByte of dest:Reg * ptr:Reg * byteOffset:Reg + | RawSet of ptr:Reg * byteOffset:Reg * value:Reg * valueType:AST.Type option + | RawSetByte of ptr:Reg * byteOffset:Reg * value:Reg + | RefCountIncString of str:Operand + | RefCountDecString of str:Operand + | RandomInt64 of dest:Reg + | DateNow of dest:Reg + | FloatToString of dest:Reg * value:FReg + | CoverageHit of exprId:int + +/// Terminators +type Terminator = + | Ret + | Branch of cond:Reg * trueLabel:Label * falseLabel:Label + | BranchZero of cond:Reg * zeroLabel:Label * nonZeroLabel:Label + | BranchBitZero of reg:Reg * bit:int * zeroLabel:Label * nonZeroLabel:Label + | BranchBitNonZero of reg:Reg * bit:int * nonZeroLabel:Label * zeroLabel:Label + | CondBranch of cond:Condition * trueLabel:Label * falseLabel:Label + | Jump of Label + +/// Basic block with label, instructions, and terminator +type BasicBlock = { + Label: Label + Instrs: Instr list + Terminator: Terminator +} + +/// Control Flow Graph +type CFG = { + Entry: Label + Blocks: Map +} + +/// Function with CFG +type Function = { + Name: string + TypedParams: TypedLIRParam list + CFG: CFG + StackSize: int + UsedCalleeSaved: PhysReg list +} + +/// LIR program (symbolic literals, no pools) +type Program = Program of functions:Function list + +/// Count the number of CoverageHit instructions in a program +let countCoverageHits (Program functions) : int = + functions + |> List.collect (fun f -> + f.CFG.Blocks + |> Map.toList + |> List.collect (fun (_, block) -> block.Instrs)) + |> List.filter (function CoverageHit _ -> true | _ -> false) + |> List.length diff --git a/backend/src/LibCompiler/LibCompiler.fsproj b/backend/src/LibCompiler/LibCompiler.fsproj new file mode 100644 index 0000000000..bf3d54fc4a --- /dev/null +++ b/backend/src/LibCompiler/LibCompiler.fsproj @@ -0,0 +1,110 @@ + + + + + Library + false + false + + --test:GraphBasedChecking --test:ParallelOptimization --test:ParallelIlxGen --nowarn:1182,3387,3366,25,20,64,40 + false + NU1900 + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + diff --git a/backend/src/LibCompiler/LiteralPool.fs b/backend/src/LibCompiler/LiteralPool.fs new file mode 100644 index 0000000000..027c95cc07 --- /dev/null +++ b/backend/src/LibCompiler/LiteralPool.fs @@ -0,0 +1,59 @@ +// LiteralPool.fs - Literal pool storage for late constant resolution +// +// Provides string and float literal pools used during ARM64 emission/encoding. + +module LiteralPool + +/// String pool for late constant resolution (used by LIR/codegen) +type StringPool = { + Strings: Map + StringToId: Map + NextId: int +} + +/// Float pool for late constant resolution (used by LIR/codegen) +/// Uses int64 bit representation as key to distinguish -0.0 from 0.0 +type FloatPool = { + Floats: Map + FloatBitsToId: Map + NextId: int +} + +/// Empty string pool +let emptyStringPool : StringPool = { + Strings = Map.empty + StringToId = Map.empty + NextId = 0 +} + +/// Empty float pool +let emptyFloatPool : FloatPool = { + Floats = Map.empty + FloatBitsToId = Map.empty + NextId = 0 +} + +/// Add a string to the pool (deduplicated), returning index and updated pool +let addString (pool: StringPool) (value: string) : int * StringPool = + match Map.tryFind value pool.StringToId with + | Some idx -> (idx, pool) + | None -> + let len = System.Text.Encoding.UTF8.GetByteCount value + let idx = pool.NextId + let strings = Map.add idx (value, len) pool.Strings + let stringToId = Map.add value idx pool.StringToId + let pool' = { pool with Strings = strings; StringToId = stringToId; NextId = idx + 1 } + (idx, pool') + +/// Add a float to the pool (deduplicated by bit pattern), returning index and updated pool +/// Uses bit-level comparison to distinguish -0.0 from 0.0 (they're equal in IEEE 754 comparison) +let addFloat (pool: FloatPool) (value: float) : int * FloatPool = + let bits = System.BitConverter.DoubleToInt64Bits(value) + match Map.tryFind bits pool.FloatBitsToId with + | Some idx -> (idx, pool) + | None -> + let idx = pool.NextId + let floats = Map.add idx value pool.Floats + let floatBitsToId = Map.add bits idx pool.FloatBitsToId + let pool' = { pool with Floats = floats; FloatBitsToId = floatBitsToId; NextId = idx + 1 } + (idx, pool') diff --git a/backend/src/LibCompiler/MIR.fs b/backend/src/LibCompiler/MIR.fs new file mode 100644 index 0000000000..fa20736b87 --- /dev/null +++ b/backend/src/LibCompiler/MIR.fs @@ -0,0 +1,205 @@ +// MIR.fs - Mid-level Intermediate Representation +// +// Defines the MIR (Mid-level IR) data structures. +// +// MIR is a platform-independent three-address code representation where: +// - Each instruction has at most two operands and one destination +// - Virtual registers are used (infinite supply) +// - Instructions are organized into basic blocks +// +// Example MIR: +// v0 <- 2 +// v1 <- 3 +// v2 <- v0 + v1 +// ret v2 + +module MIR + +/// Virtual register (infinite supply) +type VReg = VReg of int + +/// Parameter with register and type bundled (makes invalid states unrepresentable) +type TypedMIRParam = { Reg: VReg; Type: AST.Type } + +/// Operands +type Operand = + | Int64Const of int64 + | BoolConst of bool + | FloatSymbol of float + | StringSymbol of string + | Register of VReg + | FuncAddr of string // Address of a function (for higher-order functions) + +/// Binary operations +type BinOp = + // Arithmetic + | Add + | Sub + | Mul + | Div + | Mod + // Bitwise + | Shl // << (left shift) + | Shr // >> (right shift) + | BitAnd // & (bitwise and) + | BitOr // | (bitwise or) + | BitXor // ^ (bitwise xor) + // Comparisons + | Eq + | Neq + | Lt + | Gt + | Lte + | Gte + // Boolean + | And + | Or + +/// Unary operations +type UnaryOp = + | Neg + | Not + | BitNot // Bitwise NOT: ~~~expr + +/// Reference-count operation kind +type RcKind = + | GenericHeap + | TaggedList + +/// Basic block label (defined early for use in Phi nodes) +type Label = Label of string + +/// Instructions (non-control-flow) +type Instr = + | Mov of dest:VReg * src:Operand * valueType:AST.Type option // valueType for float/int distinction + | BinOp of dest:VReg * op:BinOp * left:Operand * right:Operand * operandType:AST.Type + | UnaryOp of dest:VReg * op:UnaryOp * src:Operand + | Call of dest:VReg * funcName:string * args:Operand list * argTypes:AST.Type list * returnType:AST.Type // Direct function call (BL instruction) + | TailCall of funcName:string * args:Operand list * argTypes:AST.Type list * returnType:AST.Type // Tail call (B instruction, no return) + | IndirectCall of dest:VReg * func:Operand * args:Operand list * argTypes:AST.Type list * returnType:AST.Type // Call through function pointer (BLR instruction) + | IndirectTailCall of func:Operand * args:Operand list * argTypes:AST.Type list * returnType:AST.Type // Indirect tail call (BR instruction) + | ClosureAlloc of dest:VReg * funcName:string * captures:Operand list // Allocate closure: (func_addr, caps...) + | ClosureCall of dest:VReg * closure:Operand * args:Operand list * argTypes:AST.Type list * returnType:AST.Type // Call through closure with hidden first arg + | ClosureTailCall of closure:Operand * args:Operand list * argTypes:AST.Type list // Tail call through closure (BR instruction) + // Heap operations for tuples and other compound types + | HeapAlloc of dest:VReg * sizeBytes:int // Allocate heap memory + | HeapStore of addr:VReg * offset:int * src:Operand * valueType:AST.Type option // Store at heap[addr+offset], valueType for float/int + | HeapLoad of dest:VReg * addr:VReg * offset:int * valueType:AST.Type option // Load from heap[addr+offset] + // String operations + | StringConcat of dest:VReg * left:Operand * right:Operand // Concatenate strings + // Reference counting operations + | RefCountInc of addr:VReg * payloadSize:int * kind:RcKind // Increment ref count at [addr + payloadSize] + | RefCountDec of addr:VReg * payloadSize:int * kind:RcKind // Decrement ref count, free if zero + // Output operations (for main expression result printing) + | Print of src:Operand * valueType:AST.Type // Print value with type-appropriate formatting + | RuntimeError of message:string // Print runtime error to stderr and exit with code 1 + // File I/O intrinsics (generate syscalls) + | FileReadText of dest:VReg * path:Operand // Read file, returns Result + | FileExists of dest:VReg * path:Operand // Check if file exists, returns Bool + | FileWriteText of dest:VReg * path:Operand * content:Operand // Write file, returns Result + | FileAppendText of dest:VReg * path:Operand * content:Operand // Append to file, returns Result + | FileDelete of dest:VReg * path:Operand // Delete file, returns Result + | FileSetExecutable of dest:VReg * path:Operand // Set executable bit, returns Result + | FileWriteFromPtr of dest:VReg * path:Operand * ptr:Operand * length:Operand // Write raw bytes to file + // Float intrinsics + | FloatSqrt of dest:VReg * src:Operand // Square root: sqrt(x) + | FloatAbs of dest:VReg * src:Operand // Absolute value: |x| + | FloatNeg of dest:VReg * src:Operand // Negate: -x + | Int64ToFloat of dest:VReg * src:Operand // Convert Int64 to Float64 + | FloatToInt64 of dest:VReg * src:Operand // Convert Float64 to Int64 (truncate) + | FloatToBits of dest:VReg * src:Operand // Copy Float64 bits to UInt64 + // Raw memory intrinsics (internal, for HAMT implementation) + | RawAlloc of dest:VReg * numBytes:Operand // Allocate raw bytes (no header), returns RawPtr + | RawFree of ptr:Operand // Manually free raw memory + | RawGet of dest:VReg * ptr:Operand * byteOffset:Operand * valueType:AST.Type option // Read 8 bytes at offset, valueType for float + | RawGetByte of dest:VReg * ptr:Operand * byteOffset:Operand // Read 1 byte at offset (zero-extended) + | RawSet of ptr:Operand * byteOffset:Operand * value:Operand * valueType:AST.Type option // Write 8 bytes at offset, valueType for float + | RawSetByte of ptr:Operand * byteOffset:Operand * value:Operand // Write 1 byte at offset + // String reference counting (at dynamic offset) + | RefCountIncString of str:Operand // Increment string ref count (at [str + 8 + len]) + | RefCountDecString of str:Operand // Decrement string ref count, free if zero + // Random intrinsics + | RandomInt64 of dest:VReg // Get 8 random bytes as Int64 + // Date intrinsics + | DateNow of dest:VReg // Get current Unix epoch seconds as Int64 + // Float to String conversion + | FloatToString of dest:VReg * value:Operand // Convert Float to heap String + // SSA phi node - merges values from different predecessor blocks + // Phi nodes must appear at the beginning of a basic block, before other instructions + // valueType distinguishes between integer (X registers) and float (D registers) phi nodes + | Phi of dest:VReg * sources:(Operand * Label) list * valueType:AST.Type option + // Coverage instrumentation - records that expression was executed + | CoverageHit of exprId:int + +/// Terminator instructions (control flow) +type Terminator = + | Ret of Operand // Return from function + | Branch of cond:Operand * trueLabel:Label * falseLabel:Label // Conditional branch + | Jump of Label // Unconditional jump + +/// Basic block with label, instructions, and terminator +type BasicBlock = { + Label: Label + Instrs: Instr list + Terminator: Terminator +} + +/// Control Flow Graph +type CFG = { + Entry: Label + Blocks: Map +} + +/// MIR function with CFG +type Function = { + Name: string + TypedParams: TypedMIRParam list // Parameters with types bundled + ReturnType: AST.Type // Return type (for distinguishing int vs float returns) + CFG: CFG + FloatRegs: Set // VReg IDs that hold float values (for SSA phi nodes) +} + +/// Info about a single variant in a sum type (makes structure explicit) +type VariantInfo = { + Name: string + Tag: int + Payload: AST.Type option +} + +/// All variants for a sum type, with type parameters +type TypeVariants = { + TypeParams: string list + Variants: VariantInfo list +} + +/// Maps type name -> variant information +type VariantRegistry = Map + +/// Info about a single record field (makes structure explicit) +type RecordField = { + Name: string + Type: AST.Type +} + +/// Maps type name -> list of fields +type RecordRegistry = Map + +/// MIR program (list of functions plus type/record registries) +type Program = Program of functions:Function list * variants:VariantRegistry * records:RecordRegistry + +/// Fresh register generator +type RegGen = RegGen of int + +/// Generate a fresh virtual register +let freshReg (RegGen n) : VReg * RegGen = + (VReg n, RegGen (n + 1)) + +/// Fresh label generator +type LabelGen = LabelGen of int + +/// Generate a fresh label with optional function prefix (for uniqueness across functions) +let freshLabelWithPrefix (prefix: string) (LabelGen n) : Label * LabelGen = + (Label $"{prefix}_L{n}", LabelGen (n + 1)) + +/// Initial label generator +let initialLabelGen = LabelGen 0 diff --git a/backend/src/LibCompiler/Output.fs b/backend/src/LibCompiler/Output.fs new file mode 100644 index 0000000000..d9a1056169 --- /dev/null +++ b/backend/src/LibCompiler/Output.fs @@ -0,0 +1,22 @@ +// Output.fs - Output helper functions +// +// Provides simple print functions for stdout and stderr. +// These functions use string interpolation and handle newlines explicitly. + +module Output + +/// Print to stdout without newline +let print (s: string) : unit = + printf "%s" s + +/// Print to stdout with newline +let println (s: string) : unit = + printf "%s\n" s + +/// Print to stderr without newline +let eprint (s: string) : unit = + eprintf "%s" s + +/// Print to stderr with newline +let eprintln (s: string) : unit = + eprintf "%s\n" s diff --git a/backend/src/LibCompiler/ParallelMoves.fs b/backend/src/LibCompiler/ParallelMoves.fs new file mode 100644 index 0000000000..b9038ee817 --- /dev/null +++ b/backend/src/LibCompiler/ParallelMoves.fs @@ -0,0 +1,138 @@ +// ParallelMoves.fs - Parallel move resolution algorithm +// +// This module implements the parallel move resolution algorithm used for: +// - TailArgMoves in code generation +// - Phi resolution in SSA-based register allocation +// +// The algorithm correctly sequences parallel moves to avoid clobbering values. +// It handles: +// - Simple moves (no conflict) +// - Chain moves (must reorder) +// - Cycles (need temp register) +// - Self-moves (eliminated as no-ops) + +module ParallelMoves + +/// Result of parallel move resolution - actions to perform in order +type MoveAction<'Reg, 'Src> = + | SaveToTemp of 'Reg // Save register to temp (before cycle) + | Move of dest:'Reg * src:'Src // Regular move + | MoveFromTemp of 'Reg // Move from temp to dest (end of cycle) + +/// Resolve parallel moves into a sequence of actions +/// +/// Parameters: +/// - moves: List of (dest, src) pairs representing parallel moves +/// - getSrcReg: Function to extract source register from src if it's a register (None for immediates, stack slots, etc.) +/// +/// Returns: List of actions to perform in order to correctly implement the parallel moves +let resolve<'Reg, 'Src when 'Reg : equality and 'Reg : comparison and 'Src : equality> + (moves: ('Reg * 'Src) list) + (getSrcReg: 'Src -> 'Reg option) + : MoveAction<'Reg, 'Src> list = + + // Filter out self-loops (X1 <- X1) since they're no-ops + let isSelfLoop (destReg: 'Reg, srcOp: 'Src) = + match getSrcReg srcOp with + | Some srcReg -> srcReg = destReg + | None -> false + + let nonSelfLoops = moves |> List.filter (not << isSelfLoop) + + if List.isEmpty nonSelfLoops then + [] + else + let mutable allActions : MoveAction<'Reg, 'Src> list = [] + let mutable remaining = nonSelfLoops + + // Collect all source registers used by register-source moves + let allRegSrcRegs = + nonSelfLoops + |> List.choose (fun (_, srcOp) -> getSrcReg srcOp) + |> Set.ofList + + // Phase 1: Emit non-register-source moves whose destination is NOT used as a source + // IMPORTANT: A move like X0 <- Imm cannot be emitted early if X0 is a source for another move! + let (nonRegMoves, regMoves) = + nonSelfLoops |> List.partition (fun (_, srcOp) -> getSrcReg srcOp = None) + + let (safeNonRegMoves, unsafeNonRegMoves) = + nonRegMoves |> List.partition (fun (dest, _) -> not (Set.contains dest allRegSrcRegs)) + + for (dest, src) in safeNonRegMoves do + allActions <- allActions @ [Move (dest, src)] + + remaining <- unsafeNonRegMoves @ regMoves + + // Phase 2: Iteratively emit moves where dest is not a source for remaining moves + let mutable changed = true + while changed && not (List.isEmpty remaining) do + changed <- false + let remainingSrcs = + remaining + |> List.choose (fun (_, srcOp) -> getSrcReg srcOp) + |> Set.ofList + + let (safe, unsafe) = + remaining |> List.partition (fun (destReg, _) -> not (Set.contains destReg remainingSrcs)) + + if not (List.isEmpty safe) then + changed <- true + for (dest, src) in safe do + allActions <- allActions @ [Move (dest, src)] + remaining <- unsafe + + // Phase 3: Handle cycles using temp register + // At this point, all remaining moves form cycles. For each cycle: + // 1. Save the FIRST destination to temp (it gets clobbered first but read later) + // 2. Emit all moves in DEPENDENCY ORDER (so we read from registers before they're overwritten) + // 3. Any move that reads the saved register uses temp instead + // + // Example cycle: X0 <- X1, X1 <- X2, X2 <- X0 + // 1. Save X0 to temp (X0 is written first but X2 <- X0 reads it later) + // 2. Emit in order: X0 <- X1, X1 <- X2, X2 <- temp + + while not (List.isEmpty remaining) do + // Pick the first move and save its destination + let (firstDest, _) = remaining.Head + let savedReg = firstDest + + // Save this register to temp + allActions <- allActions @ [SaveToTemp savedReg] + + // Build ordered chain starting from savedReg: + // 1. Find move that writes to savedReg (the first move to emit) + // 2. Get its source register + // 3. Find move that writes to that source register + // 4. Repeat until we find a move that reads savedReg (end of cycle) + let rec buildOrderedChain (currentDest: 'Reg) (movesLeft: ('Reg * 'Src) list) + (chain: ('Reg * 'Src) list) : ('Reg * 'Src) list = + match movesLeft |> List.tryFind (fun (d, _) -> d = currentDest) with + | Some ((dest, src) as move) -> + let movesLeft' = movesLeft |> List.filter (fun m -> m <> move) + let newChain = move :: chain + match getSrcReg src with + | Some srcReg when srcReg <> savedReg -> + // Continue following the chain + buildOrderedChain srcReg movesLeft' newChain + | _ -> + // End of cycle (source is savedReg or not a register) + newChain + | None -> + // No more moves to this destination + chain + + let orderedMoves = buildOrderedChain savedReg remaining [] |> List.rev + + // Emit moves in order, using MoveFromTemp for moves that read savedReg + for (dest, src) in orderedMoves do + match getSrcReg src with + | Some srcReg when srcReg = savedReg -> + // Use temp instead of the saved register + allActions <- allActions @ [MoveFromTemp dest] + | _ -> + allActions <- allActions @ [Move (dest, src)] + + remaining <- remaining |> List.filter (fun m -> not (List.contains m orderedMoves)) + + allActions diff --git a/backend/src/LibCompiler/Platform.fs b/backend/src/LibCompiler/Platform.fs new file mode 100644 index 0000000000..fb29339145 --- /dev/null +++ b/backend/src/LibCompiler/Platform.fs @@ -0,0 +1,113 @@ +// Platform.fs - Platform Detection and Configuration +// +// Defines OS and CPU architecture types, detection helpers, and +// per-(OS, Arch) syscall number tables. +// +// Supports: +// - macOS ARM64 (Mach-O binaries, BSD syscalls) +// - Linux ARM64 (ELF binaries, Linux syscalls) +// - Linux x86_64 (ELF binaries, Linux syscalls) + +module Platform + +open System.Runtime.InteropServices + +/// Supported target platforms +type OS = + | MacOS + | Linux + +/// Supported CPU architectures +type Arch = + | ARM64 + | X86_64 + +/// Get the current operating system +let detectOS () : Result = + if RuntimeInformation.IsOSPlatform(OSPlatform.OSX) then Ok MacOS + elif RuntimeInformation.IsOSPlatform(OSPlatform.Linux) then Ok Linux + else Error "Unsupported operating system. Only macOS and Linux are supported." + +/// Get the current CPU architecture +let detectArch () : Result = + match RuntimeInformation.OSArchitecture with + | Architecture.Arm64 -> Ok ARM64 + | Architecture.X64 -> Ok X86_64 + | arch -> Error $"Unsupported architecture: {arch}. Only ARM64 and x86_64 are supported." + +/// Syscall numbers for a specific (OS, Arch) pair. +/// On Linux, ARM64 and x86_64 use different numbering schemes. +type SyscallNumbers = { + Write: uint16 + Exit: uint16 + Mmap: uint16 // Memory map syscall for heap allocation + // File I/O syscalls + Open: uint16 // Open file (or openat on Linux with AT_FDCWD) + Read: uint16 // Read from file descriptor + Close: uint16 // Close file descriptor + Fstat: uint16 // Get file status (for file size) + Access: uint16 // Check file accessibility (for exists) + Unlink: uint16 // Delete file (or unlinkat on Linux with AT_FDCWD) + Chmod: uint16 // Change file mode (or fchmodat on Linux with AT_FDCWD) + Getrandom: uint16 // Get random bytes (getentropy on macOS, getrandom on Linux) + Gettimeofday: uint16 // Get current time (gettimeofday on macOS, clock_gettime on Linux) +} + +let macOSARM64SyscallNumbers : SyscallNumbers = { + Write = 4us + Exit = 1us + Mmap = 197us + Open = 5us + Read = 3us + Close = 6us + Fstat = 339us + Access = 33us + Unlink = 10us + Chmod = 15us + Getrandom = 439us + Gettimeofday = 116us +} + +let linuxARM64SyscallNumbers : SyscallNumbers = { + Write = 64us + Exit = 93us + Mmap = 222us + Open = 56us + Read = 63us + Close = 57us + Fstat = 80us + Access = 48us + Unlink = 35us + Chmod = 53us + Getrandom = 278us + Gettimeofday = 113us +} + +let linuxX86_64SyscallNumbers : SyscallNumbers = { + Write = 1us + Exit = 60us + Mmap = 9us + Open = 2us // open (not openat) + Read = 0us + Close = 3us + Fstat = 5us + Access = 21us + Unlink = 87us + Chmod = 90us + Getrandom = 318us + Gettimeofday = 228us // clock_gettime +} + +/// Get syscall numbers for the given (OS, Arch) pair. +let syscallNumbersFor (os: OS) (arch: Arch) : SyscallNumbers = + match os, arch with + | MacOS, ARM64 -> macOSARM64SyscallNumbers + | Linux, ARM64 -> linuxARM64SyscallNumbers + | Linux, X86_64 -> linuxX86_64SyscallNumbers + | MacOS, X86_64 -> Crash.crash "macOS x86_64 is not supported" + +/// Check if code signing is required for this platform +let requiresCodeSigning (os: OS) : bool = + match os with + | MacOS -> true + | Linux -> false diff --git a/backend/src/LibCompiler/ResultList.fs b/backend/src/LibCompiler/ResultList.fs new file mode 100644 index 0000000000..3dad553645 --- /dev/null +++ b/backend/src/LibCompiler/ResultList.fs @@ -0,0 +1,16 @@ +// ResultList.fs - Sequential helpers for list/result transforms +// +// Provides order-preserving sequential mapping helpers for compiler passes. + +module ResultList + +/// Map over a list sequentially, returning first error +let mapResults (f: 'a -> Result<'b, string>) (items: 'a list) : Result<'b list, string> = + let rec loop acc remaining = + match remaining with + | [] -> Ok (List.rev acc) + | item :: rest -> + match f item with + | Error err -> Error err + | Ok result -> loop (result :: acc) rest + loop [] items diff --git a/backend/src/LibCompiler/Runtime.fs b/backend/src/LibCompiler/Runtime.fs new file mode 100644 index 0000000000..ca2e4e3ce1 --- /dev/null +++ b/backend/src/LibCompiler/Runtime.fs @@ -0,0 +1,2907 @@ +// Runtime.fs - Runtime Support Functions +// +// Provides runtime support for language features that require complex +// instruction sequences (e.g., I/O, string conversion). +// +// Current functions: +// - generatePrintInt64: Convert int64 in X0 to ASCII and print to stdout +// +// Platform-specific: +// - Uses Platform.fs to get correct syscall numbers for the target OS + +module Runtime + +/// Generate ARM64 instructions to print int64 in X0 to stdout with newline +/// Then exit with code 0 +/// +/// Algorithm: +/// 1. Allocate 32-byte stack buffer +/// 2. Convert X0 (int64) to ASCII decimal string (work backwards from end) +/// 3. Handle negative numbers (negate value, prepend '-') +/// 4. Handle special case: zero +/// 5. Write buffer to stdout via write syscall +/// 6. Exit with code 0 via exit syscall +/// +/// Register usage: +/// - X0: Input value, then stdout fd, then exit code +/// - X1: Buffer pointer (works backwards from end) +/// - X2: Working value / length / temp +/// - X3: Divisor (10) / digit / temp +/// - X4: Quotient from division +/// - X5: Remainder (digit to store) +/// - X6: Negative flag (0 = positive, 1 = negative) +/// - X16: Syscall number +/// +/// Uses platform-specific syscall numbers from Platform module +let generatePrintInt64 () : ARM64.Instr list = + // Platform detection at runtime - if it fails, default to Linux (most common for development) + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + [ + // Allocate 32 bytes on stack for buffer (plenty for 64-bit number + sign + newline) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 32us) + + // Setup: X1 = buffer pointer (start at end, work backwards) + // X2 = value to print (from X0) + ARM64.ADD_imm (ARM64.X1, ARM64.SP, 31us) // X1 = SP + 31 (end of buffer) + ARM64.MOV_reg (ARM64.X2, ARM64.X0) // X2 = value to convert + + // Store newline at end of buffer + ARM64.MOVZ (ARM64.X3, 10us, 0) // '\n' = 10 + ARM64.STRB (ARM64.X3, ARM64.X1, 0) + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) // Move pointer back + + // Instruction 6-7: Check if negative and set flag in X6 + ARM64.MOVZ (ARM64.X6, 0us, 0) // 6: X6 = 0 (assume positive) + ARM64.TBNZ (ARM64.X2, 63, 29) // 7: If negative, branch forward +29 to inst 36 (handle_negative) + + // Instruction 8: Check if zero (branch forward +24 to print_zero at inst 32) + ARM64.CBZ_offset (ARM64.X2, 24) + + // Instruction 9-17: convert_loop - Extract digits by dividing by 10 + ARM64.MOVZ (ARM64.X3, 10us, 0) // 9: divisor = 10 + ARM64.UDIV (ARM64.X4, ARM64.X2, ARM64.X3) // 10: X4 = value / 10 + ARM64.MSUB (ARM64.X5, ARM64.X4, ARM64.X3, ARM64.X2) // 11: X5 = value % 10 + ARM64.ADD_imm (ARM64.X5, ARM64.X5, 48us) // 12: Convert to ASCII + ARM64.STRB (ARM64.X5, ARM64.X1, 0) // 13: Store digit + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) // 14: Move pointer back + ARM64.MOV_reg (ARM64.X2, ARM64.X4) // 15: value = value / 10 + ARM64.CBZ_offset (ARM64.X2, 2) // 16: If zero, skip (+2) to store_minus_if_needed at inst 18 + ARM64.B (-8) // 17: Loop back (-8) to inst 9 (convert_loop start) + + // Instruction 18-21: store_minus_if_needed - If X6=1 (was negative), store '-' + ARM64.CBZ_offset (ARM64.X6, 4) // 18: If X6=0 (positive), skip (+4) to write_output at inst 22 + ARM64.MOVZ (ARM64.X3, 45us, 0) // 19: '-' = ASCII 45 + ARM64.STRB (ARM64.X3, ARM64.X1, 0) // 20: Store '-' at X1 + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) // 21: Move pointer back + + // Instruction 22-31: write_output - Write buffer to stdout + ARM64.ADD_imm (ARM64.X1, ARM64.X1, 1us) // 22: X1 was one past first char + ARM64.ADD_imm (ARM64.X2, ARM64.SP, 32us) // 23: End of buffer + ARM64.SUB_reg (ARM64.X2, ARM64.X2, ARM64.X1) // 24: length = end - start + ARM64.MOVZ (ARM64.X0, 1us, 0) // 25: stdout = 1 + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) // 26: write syscall (X16 macOS, X8 Linux) + ARM64.SVC syscalls.SvcImmediate // 27: call write (platform-specific) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 32us) // 28: Deallocate stack + ARM64.MOVZ (ARM64.X0, 0us, 0) // 29: exit code = 0 + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Exit, 0) // 30: exit syscall (X16 macOS, X8 Linux) + ARM64.SVC syscalls.SvcImmediate // 31: call exit (platform-specific) + + // Instruction 32-35: print_zero - Special case for value 0 + ARM64.MOVZ (ARM64.X2, 48us, 0) // 32: '0' = 48 + ARM64.STRB (ARM64.X2, ARM64.X1, 0) // 33: Store '0' + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) // 34: Move pointer back + ARM64.B (-13) // 35: Branch back (-13) to inst 22 (write_output) + + // Instruction 36-38: handle_negative - Negate value and set flag + ARM64.NEG (ARM64.X2, ARM64.X2) // 36: X2 = -X2 (get absolute value) + ARM64.MOVZ (ARM64.X6, 1us, 0) // 37: X6 = 1 (negative flag) + ARM64.B (-30) // 38: Branch back (-30) to inst 8 (CBZ zero check) + ] + +/// Generate ARM64 instructions to print boolean in X0 to stdout with newline +/// Then exit with code 0 +/// +/// Algorithm: +/// 1. Check if X0 == 0 (false) or != 0 (true) +/// 2. Store "true\n" or "false\n" on stack +/// 3. Write to stdout via write syscall +/// 4. Exit with code 0 +/// +/// Register usage: +/// - X0: Input boolean value (0=false, non-zero=true) +/// - X1: Buffer pointer +/// - X2: Length +/// - X3: Temp for storing chars +/// - X16/X8: Syscall number +let generatePrintBool () : ARM64.Instr list = + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + [ + // Allocate 16 bytes on stack for buffer (16-byte aligned) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 16us) + + // Check if value is false (X0 == 0) + ARM64.CBZ_offset (ARM64.X0, 17) // If false, branch to print_false (+17 instructions) + + // print_true: Store "true\n" on stack (5 bytes) + // 't' = 116, 'r' = 114, 'u' = 117, 'e' = 101, '\n' = 10 + ARM64.MOVZ (ARM64.X3, 116us, 0) // 't' + ARM64.STRB (ARM64.X3, ARM64.SP, 0) + ARM64.MOVZ (ARM64.X3, 114us, 0) // 'r' + ARM64.STRB (ARM64.X3, ARM64.SP, 1) + ARM64.MOVZ (ARM64.X3, 117us, 0) // 'u' + ARM64.STRB (ARM64.X3, ARM64.SP, 2) + ARM64.MOVZ (ARM64.X3, 101us, 0) // 'e' + ARM64.STRB (ARM64.X3, ARM64.SP, 3) + ARM64.MOVZ (ARM64.X3, 10us, 0) // '\n' + ARM64.STRB (ARM64.X3, ARM64.SP, 4) + ARM64.MOVZ (ARM64.X2, 5us, 0) // length = 5 + + // Write and exit + ARM64.MOV_reg (ARM64.X1, ARM64.SP) // buffer + ARM64.MOVZ (ARM64.X0, 1us, 0) // stdout + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + ARM64.B (16) // Jump to cleanup_and_exit (+16 instructions) + + // print_false: Store "false\n" on stack (6 bytes) + // 'f' = 102, 'a' = 97, 'l' = 108, 's' = 115, 'e' = 101, '\n' = 10 + ARM64.MOVZ (ARM64.X3, 102us, 0) // 'f' + ARM64.STRB (ARM64.X3, ARM64.SP, 0) + ARM64.MOVZ (ARM64.X3, 97us, 0) // 'a' + ARM64.STRB (ARM64.X3, ARM64.SP, 1) + ARM64.MOVZ (ARM64.X3, 108us, 0) // 'l' + ARM64.STRB (ARM64.X3, ARM64.SP, 2) + ARM64.MOVZ (ARM64.X3, 115us, 0) // 's' + ARM64.STRB (ARM64.X3, ARM64.SP, 3) + ARM64.MOVZ (ARM64.X3, 101us, 0) // 'e' + ARM64.STRB (ARM64.X3, ARM64.SP, 4) + ARM64.MOVZ (ARM64.X3, 10us, 0) // '\n' + ARM64.STRB (ARM64.X3, ARM64.SP, 5) + ARM64.MOVZ (ARM64.X2, 6us, 0) // length = 6 + + // Write + ARM64.MOV_reg (ARM64.X1, ARM64.SP) // buffer + ARM64.MOVZ (ARM64.X0, 1us, 0) // stdout + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + + // cleanup_and_exit: + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 16us) // Deallocate stack + ARM64.MOVZ (ARM64.X0, 0us, 0) // exit code = 0 + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Exit, 0) + ARM64.SVC syscalls.SvcImmediate + ] + +/// Generate ARM64 instructions to print string to stdout with newline, then exit +/// +/// Assumes: +/// - X0 = string address (set up by caller via ADRP + ADD_label) +/// - stringLen = length of string to print (not including any newline) +/// +/// Algorithm: +/// 1. Save string address +/// 2. Print string via write syscall +/// 3. Print newline via write syscall +/// 4. Exit with code 0 +/// +/// Register usage: +/// - X0: string address, then stdout fd +/// - X1: buffer pointer +/// - X2: length +/// - X16/X8: Syscall number (platform-specific) +let generatePrintString (stringLen: int) : ARM64.Instr list = + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + [ + // String layout: [length:8][data:N] - skip length prefix + // X0 points to string start (length field), data is at X0+8 + ARM64.ADD_imm (ARM64.X1, ARM64.X0, 8us) // X1 = data address (skip 8-byte length) + ARM64.MOVZ (ARM64.X0, 1us, 0) // X0 = stdout fd (1) + + // Load string length into X2 + // For lengths > 16 bits, we'd need MOVK, but strings this long are unlikely + ARM64.MOVZ (ARM64.X2, uint16 stringLen, 0) // X2 = length + + // Call write syscall + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + + // Now print newline: allocate 1 byte on stack + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 16us) // 16-byte aligned + ARM64.MOVZ (ARM64.X3, 10us, 0) // '\n' = 10 + ARM64.STRB (ARM64.X3, ARM64.SP, 0) // Store newline at SP + + // Write newline + ARM64.MOVZ (ARM64.X0, 1us, 0) // stdout + ARM64.MOV_reg (ARM64.X1, ARM64.SP) // buffer = SP + ARM64.MOVZ (ARM64.X2, 1us, 0) // length = 1 + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + + // Cleanup stack + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 16us) + + // Exit with code 0 + ARM64.MOVZ (ARM64.X0, 0us, 0) + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Exit, 0) + ARM64.SVC syscalls.SvcImmediate + ] + +/// Generate ARM64 instructions to print float in D0 to stdout with newline +/// Then exit with code 0 +/// +/// Algorithm: +/// 1. Extract integer part: FCVTZS X0, D0 +/// 2. Check if negative and handle sign +/// 3. Print integer part (absolute value) +/// 4. Print decimal point '.' +/// 5. Extract fractional part: frac = abs(D0) - floor(abs(D0)) +/// 6. Multiply by 10^2 to get 2 decimal digits +/// 7. Print fractional digits, trimming a trailing zero +/// 8. Print newline and exit +/// +/// Register usage: +/// - D0: Input float value +/// - D1-D3: Working FP registers +/// - X0-X6: Working integer registers (same as PrintInt64) +/// - X7: Loop counter for fractional digits +/// - X16/X8: Syscall number (platform-specific) +let generatePrintFloat () : ARM64.Instr list = + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + [ + // Allocate 48 bytes on stack for buffer (room for sign, digits, decimal, digits, newline) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 48us) + + // Save D0 in case we need the original value + // Store it on stack at [SP+32] (8 bytes for double) + ARM64.STR_fp (ARM64.D0, ARM64.SP, 32s) + + // Check if negative using D0's sign bit (before FCVTZS, which loses sign for -0.x values) + ARM64.MOVZ (ARM64.X6, 0us, 0) // X6 = 0 (assume positive) + ARM64.FMOV_to_gp (ARM64.X0, ARM64.D0) // Get bit pattern of D0 + ARM64.TBNZ (ARM64.X0, 63, 2) // If sign bit set, set X6 = 1 + ARM64.B (2) // Skip setting X6 + ARM64.MOVZ (ARM64.X6, 1us, 0) // X6 = 1 (negative) + + // Setup: X1 = buffer pointer (start at end, work backwards) + // Use SP+31 as the end of buffer (we'll build digits backwards from here) + ARM64.ADD_imm (ARM64.X1, ARM64.SP, 31us) // X1 = SP + 31 (end of buffer) + + // Extract integer part using FCVTZS (truncate toward zero) + ARM64.FCVTZS (ARM64.X0, ARM64.D0) // X0 = integer part (may be negative) + // Make X2 = absolute value of X0 + ARM64.TBNZ (ARM64.X0, 63, 3) // If negative, skip the MOV and go to NEG + ARM64.MOV_reg (ARM64.X2, ARM64.X0) // X2 = X0 (positive) + ARM64.B (2) // Skip NEG + ARM64.NEG (ARM64.X2, ARM64.X0) // X2 = -X0 (make positive) + + // === Print integer part (positive value in X2) === + // Label: after_sign_check + // Instruction offset: 14 + + // Check if integer part is zero (branch to print_zero_int) + ARM64.CBZ_offset (ARM64.X2, 64) // If zero, branch to print_zero_int (inst 77) + + // convert_int_loop - Extract digits by dividing by 10 + ARM64.MOVZ (ARM64.X3, 10us, 0) // divisor = 10 + ARM64.UDIV (ARM64.X4, ARM64.X2, ARM64.X3) // X4 = value / 10 + ARM64.MSUB (ARM64.X5, ARM64.X4, ARM64.X3, ARM64.X2) // X5 = value % 10 + ARM64.ADD_imm (ARM64.X5, ARM64.X5, 48us) // Convert to ASCII + ARM64.STRB (ARM64.X5, ARM64.X1, 0) // Store digit + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) // Move pointer back + ARM64.MOV_reg (ARM64.X2, ARM64.X4) // value = value / 10 + ARM64.CBZ_offset (ARM64.X2, 2) // If zero, done with integer + ARM64.B (-8) // Loop back + + // store_minus_if_needed - If X6=1 (was negative), store '-' + ARM64.CBZ_offset (ARM64.X6, 4) // If X6=0 (positive), skip + ARM64.MOVZ (ARM64.X3, 45us, 0) // '-' = ASCII 45 + ARM64.STRB (ARM64.X3, ARM64.X1, 0) // Store '-' + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) // Move pointer back + + // print_integer_part - Write integer digits to stdout + ARM64.ADD_imm (ARM64.X1, ARM64.X1, 1us) // X1 was one past first char + ARM64.ADD_imm (ARM64.X2, ARM64.SP, 32us) // End of int buffer + ARM64.SUB_reg (ARM64.X2, ARM64.X2, ARM64.X1) // length = end - start + // Save X6 to stack at [SP+40] before syscalls (syscalls may clobber X0-X7) + ARM64.STR (ARM64.X6, ARM64.SP, 40s) + ARM64.MOVZ (ARM64.X0, 1us, 0) // stdout = 1 + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + + // print_decimal_point - Print '.' + ARM64.MOVZ (ARM64.X3, 46us, 0) // '.' = 46 + ARM64.STRB (ARM64.X3, ARM64.SP, 0) // Store at [SP] + ARM64.MOVZ (ARM64.X0, 1us, 0) // stdout + ARM64.MOV_reg (ARM64.X1, ARM64.SP) // buffer = SP + ARM64.MOVZ (ARM64.X2, 1us, 0) // length = 1 + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + + // === Extract and print fractional part (1 or 2 decimal digits) === + // Reload original float value + ARM64.LDR_fp (ARM64.D0, ARM64.SP, 32s) // Reload original value + + // Get integer part again and compute fractional part + ARM64.FCVTZS (ARM64.X0, ARM64.D0) // X0 = integer part (signed) + ARM64.SCVTF (ARM64.D1, ARM64.X0) // D1 = (double)integer (signed) + ARM64.FSUB (ARM64.D0, ARM64.D0, ARM64.D1) // D0 = fractional part (signed, same sign as original) + + // Multiply fractional part by 100 to get 2 digits + ARM64.MOVZ (ARM64.X0, 100us, 0) // 100 + ARM64.SCVTF (ARM64.D1, ARM64.X0) // D1 = 100.0 + ARM64.FMUL (ARM64.D0, ARM64.D0, ARM64.D1) // D0 = frac * 100 (might be negative) + ARM64.FCVTZS (ARM64.X7, ARM64.D0) // X7 = fractional digits as integer (might be negative) + + // Take absolute value of X7 if negative + ARM64.TBNZ (ARM64.X7, 63, 2) // If sign bit set, skip the B + ARM64.B (2) // Skip NEG if positive + ARM64.NEG (ARM64.X7, ARM64.X7) // Negate to make positive + + // Extract both digits BEFORE any syscalls (syscalls clobber X0-X7) + ARM64.MOVZ (ARM64.X3, 10us, 0) + ARM64.UDIV (ARM64.X4, ARM64.X7, ARM64.X3) // X4 = X7 / 10 (tens digit) + ARM64.MSUB (ARM64.X5, ARM64.X4, ARM64.X3, ARM64.X7) // X5 = X7 % 10 (ones digit) + // Store digits at [SP+1] and [SP+2] for later + ARM64.ADD_imm (ARM64.X4, ARM64.X4, 48us) // Convert tens to ASCII + ARM64.STRB (ARM64.X4, ARM64.SP, 1) // Store tens digit at [SP+1] + ARM64.ADD_imm (ARM64.X5, ARM64.X5, 48us) // Convert ones to ASCII + ARM64.STRB (ARM64.X5, ARM64.SP, 2) // Store ones digit at [SP+2] + + // Print one or two digits in one syscall (trim trailing zero) + ARM64.MOVZ (ARM64.X0, 1us, 0) // stdout + ARM64.ADD_imm (ARM64.X1, ARM64.SP, 1us) // buffer at [SP+1] + ARM64.SUBS_imm (ARM64.X5, ARM64.X5, 48us) // Set flags if ones digit was '0' + ARM64.CSET (ARM64.X2, ARM64.NE) // X2 = 1 when ones digit != 0 + ARM64.ADD_imm (ARM64.X2, ARM64.X2, 1us) // length = 1 or 2 + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + + // print_newline_and_exit + ARM64.MOVZ (ARM64.X3, 10us, 0) // '\n' + ARM64.STRB (ARM64.X3, ARM64.SP, 0) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.MOV_reg (ARM64.X1, ARM64.SP) + ARM64.MOVZ (ARM64.X2, 1us, 0) + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + + // Cleanup and exit + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 48us) // Deallocate stack + ARM64.MOVZ (ARM64.X0, 0us, 0) // exit code = 0 + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Exit, 0) + ARM64.SVC syscalls.SvcImmediate + + // print_zero_int - Integer part is zero, just store '0' (instruction 75) + ARM64.MOVZ (ARM64.X2, 48us, 0) // '0' = 48 + ARM64.STRB (ARM64.X2, ARM64.X1, 0) // Store '0' + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) // Move pointer back + ARM64.B (-57) // Branch back to store_minus_if_needed (inst 23) + ] + +/// Generate ARM64 instructions to exit with code 0 +let generateExit () : ARM64.Instr list = + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + [ + ARM64.MOVZ (ARM64.X0, 0us, 0) // exit code = 0 + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Exit, 0) + ARM64.SVC syscalls.SvcImmediate + ] + +/// Generate ARM64 instructions to print int64 in X0 to stdout with newline (NO EXIT) +/// Same as generatePrintInt64 but returns instead of exiting +let generatePrintInt64NoExit () : ARM64.Instr list = + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + [ + // Allocate 32 bytes on stack for buffer + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 32us) + + // Setup: X1 = buffer pointer, X2 = value + ARM64.ADD_imm (ARM64.X1, ARM64.SP, 31us) + ARM64.MOV_reg (ARM64.X2, ARM64.X0) + + // Store newline at end of buffer + ARM64.MOVZ (ARM64.X3, 10us, 0) + ARM64.STRB (ARM64.X3, ARM64.X1, 0) + + // Initialize: X6 = 0 (positive flag), X3 = 10 (divisor) + ARM64.MOVZ (ARM64.X6, 0us, 0) + ARM64.MOVZ (ARM64.X3, 10us, 0) + + // Check for negative: if X2 < 0, branch to handle_negative (at instruction 33) + ARM64.CMP_imm (ARM64.X2, 0us) + ARM64.B_cond (ARM64.LT, 25) // 33 - 8 = 25 + + // Check for zero: if X2 == 0, branch to print_zero (at instruction 29) + ARM64.CBZ_offset (ARM64.X2, 20) // 29 - 9 = 20 + + // digit_loop: Extract digits + ARM64.UDIV (ARM64.X4, ARM64.X2, ARM64.X3) + ARM64.MSUB (ARM64.X5, ARM64.X4, ARM64.X3, ARM64.X2) + ARM64.ADD_imm (ARM64.X5, ARM64.X5, 48us) + ARM64.STRB (ARM64.X5, ARM64.X1, 0) + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) + ARM64.MOV_reg (ARM64.X2, ARM64.X4) + ARM64.CBNZ_offset (ARM64.X2, -6) + + // store_minus_if_needed + ARM64.CBZ_offset (ARM64.X6, 4) + ARM64.MOVZ (ARM64.X3, 45us, 0) + ARM64.STRB (ARM64.X3, ARM64.X1, 0) + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) + + // write_output + ARM64.ADD_imm (ARM64.X1, ARM64.X1, 1us) + ARM64.ADD_imm (ARM64.X2, ARM64.SP, 32us) + ARM64.SUB_reg (ARM64.X2, ARM64.X2, ARM64.X1) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 32us) // Deallocate stack + ARM64.B (8) // Skip past print_zero (4) and handle_negative (3) + 1 to exit runtime (8 instructions) + + // print_zero (at instruction 29) + ARM64.MOVZ (ARM64.X2, 48us, 0) + ARM64.STRB (ARM64.X2, ARM64.X1, 0) + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) + ARM64.B (-15) // Jump to store_minus_if_needed: 17 - 32 = -15 + + // handle_negative (at instruction 33) + ARM64.NEG (ARM64.X2, ARM64.X2) + ARM64.MOVZ (ARM64.X6, 1us, 0) + ARM64.B (-26) // Jump to check_zero: 9 - 35 = -26 + ] + +/// Generate ARM64 instructions to print int64 in X0 to stderr with newline (NO EXIT) +/// Same as generatePrintInt64NoExit but writes to file descriptor 2 +let generatePrintInt64ToStderrNoExit () : ARM64.Instr list = + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + [ + // Allocate 32 bytes on stack for buffer + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 32us) + + // Setup: X1 = buffer pointer, X2 = value + ARM64.ADD_imm (ARM64.X1, ARM64.SP, 31us) + ARM64.MOV_reg (ARM64.X2, ARM64.X0) + + // Store newline at end of buffer + ARM64.MOVZ (ARM64.X3, 10us, 0) + ARM64.STRB (ARM64.X3, ARM64.X1, 0) + + // Initialize: X6 = 0 (positive flag), X3 = 10 (divisor) + ARM64.MOVZ (ARM64.X6, 0us, 0) + ARM64.MOVZ (ARM64.X3, 10us, 0) + + // Check for negative: if X2 < 0, branch to handle_negative (at instruction 33) + ARM64.CMP_imm (ARM64.X2, 0us) + ARM64.B_cond (ARM64.LT, 25) // 33 - 8 = 25 + + // Check for zero: if X2 == 0, branch to print_zero (at instruction 29) + ARM64.CBZ_offset (ARM64.X2, 20) // 29 - 9 = 20 + + // digit_loop: Extract digits + ARM64.UDIV (ARM64.X4, ARM64.X2, ARM64.X3) + ARM64.MSUB (ARM64.X5, ARM64.X4, ARM64.X3, ARM64.X2) + ARM64.ADD_imm (ARM64.X5, ARM64.X5, 48us) + ARM64.STRB (ARM64.X5, ARM64.X1, 0) + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) + ARM64.MOV_reg (ARM64.X2, ARM64.X4) + ARM64.CBNZ_offset (ARM64.X2, -6) + + // store_minus_if_needed + ARM64.CBZ_offset (ARM64.X6, 4) + ARM64.MOVZ (ARM64.X3, 45us, 0) + ARM64.STRB (ARM64.X3, ARM64.X1, 0) + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) + + // write_output + ARM64.ADD_imm (ARM64.X1, ARM64.X1, 1us) + ARM64.ADD_imm (ARM64.X2, ARM64.SP, 32us) + ARM64.SUB_reg (ARM64.X2, ARM64.X2, ARM64.X1) + ARM64.MOVZ (ARM64.X0, 2us, 0) + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 32us) // Deallocate stack + ARM64.B (8) // Skip past print_zero (4) and handle_negative (3) + 1 to exit runtime (8 instructions) + + // print_zero (at instruction 29) + ARM64.MOVZ (ARM64.X2, 48us, 0) + ARM64.STRB (ARM64.X2, ARM64.X1, 0) + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) + ARM64.B (-15) // Jump to store_minus_if_needed: 17 - 32 = -15 + + // handle_negative (at instruction 33) + ARM64.NEG (ARM64.X2, ARM64.X2) + ARM64.MOVZ (ARM64.X6, 1us, 0) + ARM64.B (-26) // Jump to check_zero: 9 - 35 = -26 + ] + +/// Generate ARM64 instructions to print boolean in X0 to stdout with newline (NO EXIT) +/// Same as generatePrintBool but returns instead of exiting +let generatePrintBoolNoExit () : ARM64.Instr list = + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + [ + // Allocate 16 bytes on stack for buffer + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 16us) + + // Check if false (X0 == 0), branch to print_false (+17 instructions) + ARM64.CBZ_offset (ARM64.X0, 17) + + // print_true: Store "true\n" on stack (5 bytes) + ARM64.MOVZ (ARM64.X3, 116us, 0) // 't' + ARM64.STRB (ARM64.X3, ARM64.SP, 0) + ARM64.MOVZ (ARM64.X3, 114us, 0) // 'r' + ARM64.STRB (ARM64.X3, ARM64.SP, 1) + ARM64.MOVZ (ARM64.X3, 117us, 0) // 'u' + ARM64.STRB (ARM64.X3, ARM64.SP, 2) + ARM64.MOVZ (ARM64.X3, 101us, 0) // 'e' + ARM64.STRB (ARM64.X3, ARM64.SP, 3) + ARM64.MOVZ (ARM64.X3, 10us, 0) // '\n' + ARM64.STRB (ARM64.X3, ARM64.SP, 4) + ARM64.MOVZ (ARM64.X2, 5us, 0) // length = 5 + + // Write and cleanup (no exit) + ARM64.MOV_reg (ARM64.X1, ARM64.SP) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + ARM64.B (18) // Jump to cleanup (+18 instructions to skip false branch) + + // print_false: Store "false\n" on stack (6 bytes) + ARM64.MOVZ (ARM64.X3, 102us, 0) // 'f' + ARM64.STRB (ARM64.X3, ARM64.SP, 0) + ARM64.MOVZ (ARM64.X3, 97us, 0) // 'a' + ARM64.STRB (ARM64.X3, ARM64.SP, 1) + ARM64.MOVZ (ARM64.X3, 108us, 0) // 'l' + ARM64.STRB (ARM64.X3, ARM64.SP, 2) + ARM64.MOVZ (ARM64.X3, 115us, 0) // 's' + ARM64.STRB (ARM64.X3, ARM64.SP, 3) + ARM64.MOVZ (ARM64.X3, 101us, 0) // 'e' + ARM64.STRB (ARM64.X3, ARM64.SP, 4) + ARM64.MOVZ (ARM64.X3, 10us, 0) // '\n' + ARM64.STRB (ARM64.X3, ARM64.SP, 5) + ARM64.MOVZ (ARM64.X2, 6us, 0) // length = 6 + + // Write + ARM64.MOV_reg (ARM64.X1, ARM64.SP) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + + // cleanup (no exit): + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 16us) + ] + +/// Generate ARM64 instructions to print int64 in X0 to stdout WITHOUT newline +/// For use in tuple/list element printing +let generatePrintInt64NoNewline () : ARM64.Instr list = + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + [ + // Allocate 32 bytes on stack for buffer + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 32us) + + // Setup: X1 = buffer pointer (start at end-1, no newline), X2 = value + ARM64.ADD_imm (ARM64.X1, ARM64.SP, 30us) // One less than with newline + ARM64.MOV_reg (ARM64.X2, ARM64.X0) + + // Initialize: X6 = 0 (positive flag), X3 = 10 (divisor) + ARM64.MOVZ (ARM64.X6, 0us, 0) + ARM64.MOVZ (ARM64.X3, 10us, 0) + + // Check for negative: if X2 < 0, branch to handle_negative (at index 31) + ARM64.CMP_imm (ARM64.X2, 0us) + ARM64.B_cond (ARM64.LT, 25) // 31 - 6 = 25 + + // Check for zero: if X2 == 0, branch to print_zero (at index 27) + ARM64.CBZ_offset (ARM64.X2, 20) // 27 - 7 = 20 + + // digit_loop: Extract digits + ARM64.UDIV (ARM64.X4, ARM64.X2, ARM64.X3) + ARM64.MSUB (ARM64.X5, ARM64.X4, ARM64.X3, ARM64.X2) + ARM64.ADD_imm (ARM64.X5, ARM64.X5, 48us) + ARM64.STRB (ARM64.X5, ARM64.X1, 0) + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) + ARM64.MOV_reg (ARM64.X2, ARM64.X4) + ARM64.CBNZ_offset (ARM64.X2, -6) + + // store_minus_if_needed + ARM64.CBZ_offset (ARM64.X6, 4) + ARM64.MOVZ (ARM64.X3, 45us, 0) + ARM64.STRB (ARM64.X3, ARM64.X1, 0) + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) + + // write_output + ARM64.ADD_imm (ARM64.X1, ARM64.X1, 1us) + ARM64.ADD_imm (ARM64.X2, ARM64.SP, 31us) // End of buffer area + ARM64.SUB_reg (ARM64.X2, ARM64.X2, ARM64.X1) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 32us) // Deallocate stack + ARM64.B (8) // Skip past print_zero (4) and handle_negative (3) + 1 to exit + + // print_zero (at index 27) + ARM64.MOVZ (ARM64.X2, 48us, 0) + ARM64.STRB (ARM64.X2, ARM64.X1, 0) + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) + ARM64.B (-15) // Jump to store_minus_if_needed at index 15: 15 - 30 = -15 + + // handle_negative (at index 31) + ARM64.NEG (ARM64.X2, ARM64.X2) + ARM64.MOVZ (ARM64.X6, 1us, 0) + ARM64.B (-25) // Jump to digit_loop at index 8: 8 - 33 = -25 + ] + +/// Generate ARM64 instructions to print boolean in X0 to stdout WITHOUT newline +/// For use in tuple/list element printing +let generatePrintBoolNoNewline () : ARM64.Instr list = + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + [ + // Allocate 16 bytes on stack for buffer + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 16us) + + // Check if false (X0 == 0), branch to print_false at index 16 + ARM64.CBZ_offset (ARM64.X0, 15) // 16 - 1 = 15 + + // print_true: Store "true" on stack (4 bytes, no newline) + ARM64.MOVZ (ARM64.X3, 116us, 0) // 't' + ARM64.STRB (ARM64.X3, ARM64.SP, 0) + ARM64.MOVZ (ARM64.X3, 114us, 0) // 'r' + ARM64.STRB (ARM64.X3, ARM64.SP, 1) + ARM64.MOVZ (ARM64.X3, 117us, 0) // 'u' + ARM64.STRB (ARM64.X3, ARM64.SP, 2) + ARM64.MOVZ (ARM64.X3, 101us, 0) // 'e' + ARM64.STRB (ARM64.X3, ARM64.SP, 3) + ARM64.MOVZ (ARM64.X2, 4us, 0) // length = 4 (no newline) + + // Write and cleanup + ARM64.MOV_reg (ARM64.X1, ARM64.SP) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + ARM64.B (16) // Jump to cleanup at index 31: 31 - 15 = 16 + + // print_false: Store "false" on stack (5 bytes, no newline) + ARM64.MOVZ (ARM64.X3, 102us, 0) // 'f' + ARM64.STRB (ARM64.X3, ARM64.SP, 0) + ARM64.MOVZ (ARM64.X3, 97us, 0) // 'a' + ARM64.STRB (ARM64.X3, ARM64.SP, 1) + ARM64.MOVZ (ARM64.X3, 108us, 0) // 'l' + ARM64.STRB (ARM64.X3, ARM64.SP, 2) + ARM64.MOVZ (ARM64.X3, 115us, 0) // 's' + ARM64.STRB (ARM64.X3, ARM64.SP, 3) + ARM64.MOVZ (ARM64.X3, 101us, 0) // 'e' + ARM64.STRB (ARM64.X3, ARM64.SP, 4) + ARM64.MOVZ (ARM64.X2, 5us, 0) // length = 5 (no newline) + + // Write + ARM64.MOV_reg (ARM64.X1, ARM64.SP) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + + // cleanup: + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 16us) + ] + +/// Generate ARM64 instructions to print float in D0 to stdout WITHOUT newline +/// For use in tuple/list element printing +/// Similar to generatePrintFloat but doesn't add newline or exit +let generatePrintFloatNoNewline () : ARM64.Instr list = + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + [ + // Allocate 48 bytes on stack for buffer + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 48us) + + // Save D0 at [SP+32] + ARM64.STR_fp (ARM64.D0, ARM64.SP, 32s) + + // Check if negative using D0's sign bit + ARM64.MOVZ (ARM64.X6, 0us, 0) // X6 = 0 (assume positive) + ARM64.FMOV_to_gp (ARM64.X0, ARM64.D0) // Get bit pattern + ARM64.TBNZ (ARM64.X0, 63, 2) // If sign bit set, set X6 = 1 + ARM64.B (2) // Skip setting X6 + ARM64.MOVZ (ARM64.X6, 1us, 0) // X6 = 1 (negative) + + // Setup: X1 = buffer pointer (start at end) + ARM64.ADD_imm (ARM64.X1, ARM64.SP, 31us) + + // Extract integer part + ARM64.FCVTZS (ARM64.X0, ARM64.D0) + ARM64.TBNZ (ARM64.X0, 63, 3) + ARM64.MOV_reg (ARM64.X2, ARM64.X0) + ARM64.B (2) + ARM64.NEG (ARM64.X2, ARM64.X0) + + // Check if integer part is zero + ARM64.CBZ_offset (ARM64.X2, 55) // Branch to print_zero_int (instruction 69) + + // convert_int_loop + ARM64.MOVZ (ARM64.X3, 10us, 0) + ARM64.UDIV (ARM64.X4, ARM64.X2, ARM64.X3) + ARM64.MSUB (ARM64.X5, ARM64.X4, ARM64.X3, ARM64.X2) + ARM64.ADD_imm (ARM64.X5, ARM64.X5, 48us) + ARM64.STRB (ARM64.X5, ARM64.X1, 0) + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) + ARM64.MOV_reg (ARM64.X2, ARM64.X4) + ARM64.CBZ_offset (ARM64.X2, 2) + ARM64.B (-8) + + // store_minus_if_needed + ARM64.CBZ_offset (ARM64.X6, 4) + ARM64.MOVZ (ARM64.X3, 45us, 0) + ARM64.STRB (ARM64.X3, ARM64.X1, 0) + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) + + // print_integer_part + ARM64.ADD_imm (ARM64.X1, ARM64.X1, 1us) + ARM64.ADD_imm (ARM64.X2, ARM64.SP, 32us) + ARM64.SUB_reg (ARM64.X2, ARM64.X2, ARM64.X1) + ARM64.STR (ARM64.X6, ARM64.SP, 40s) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + + // print_decimal_point + ARM64.MOVZ (ARM64.X3, 46us, 0) + ARM64.STRB (ARM64.X3, ARM64.SP, 0) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.MOV_reg (ARM64.X1, ARM64.SP) + ARM64.MOVZ (ARM64.X2, 1us, 0) + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + + // Extract and print fractional part (1 or 2 decimal digits) + ARM64.LDR_fp (ARM64.D0, ARM64.SP, 32s) + ARM64.FCVTZS (ARM64.X0, ARM64.D0) + ARM64.SCVTF (ARM64.D1, ARM64.X0) + ARM64.FSUB (ARM64.D0, ARM64.D0, ARM64.D1) + ARM64.MOVZ (ARM64.X0, 100us, 0) + ARM64.SCVTF (ARM64.D1, ARM64.X0) + ARM64.FMUL (ARM64.D0, ARM64.D0, ARM64.D1) + ARM64.FCVTZS (ARM64.X7, ARM64.D0) + + // Take absolute value of X7 + ARM64.TBNZ (ARM64.X7, 63, 2) + ARM64.B (2) + ARM64.NEG (ARM64.X7, ARM64.X7) + + // Extract digits + ARM64.MOVZ (ARM64.X3, 10us, 0) + ARM64.UDIV (ARM64.X4, ARM64.X7, ARM64.X3) + ARM64.MSUB (ARM64.X5, ARM64.X4, ARM64.X3, ARM64.X7) + ARM64.ADD_imm (ARM64.X4, ARM64.X4, 48us) + ARM64.STRB (ARM64.X4, ARM64.SP, 1) + ARM64.ADD_imm (ARM64.X5, ARM64.X5, 48us) + ARM64.STRB (ARM64.X5, ARM64.SP, 2) + + // Print one or two digits (trim trailing zero) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.ADD_imm (ARM64.X1, ARM64.SP, 1us) + ARM64.SUBS_imm (ARM64.X5, ARM64.X5, 48us) + ARM64.CSET (ARM64.X2, ARM64.NE) + ARM64.ADD_imm (ARM64.X2, ARM64.X2, 1us) + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + + // Cleanup (no newline, no exit) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 48us) + ARM64.B (5) // Skip past print_zero_int (4 instructions + 1 to land after) + + // print_zero_int (instruction 69) + ARM64.MOVZ (ARM64.X2, 48us, 0) + ARM64.STRB (ARM64.X2, ARM64.X1, 0) + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) + ARM64.B (-48) // Branch back to store_minus_if_needed (instruction 24) + ] + +/// Generate ARM64 instructions to print heap string WITHOUT newline +/// Expects: X9 = data address, X10 = length +/// For use in tuple/list element printing +let generatePrintStringNoNewline () : ARM64.Instr list = + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + [ + // Write string to stdout + ARM64.MOVZ (ARM64.X0, 1us, 0) // fd = stdout + ARM64.MOV_reg (ARM64.X1, ARM64.X9) // buffer = X9 + ARM64.MOV_reg (ARM64.X2, ARM64.X10) // length = X10 + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + ] + +/// Generate ARM64 instructions to print a sequence of literal characters +/// Used for printing delimiters like "(", ")", "[", "]", ", " etc. +/// +/// Algorithm: +/// 1. Allocate aligned stack buffer +/// 2. Store each byte on stack +/// 3. Write to stdout via syscall +/// 4. Deallocate stack +/// +/// No newline is added - caller controls newlines +let generatePrintChars (chars: byte list) : ARM64.Instr list = + if List.isEmpty chars then [] else + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + let len = List.length chars + // Stack allocation must be 16-byte aligned + let stackSize = max 16 ((len + 15) / 16 * 16) + [ + // Allocate stack buffer + ARM64.SUB_imm (ARM64.SP, ARM64.SP, uint16 stackSize) + ] + @ (chars |> List.mapi (fun i b -> + [ + ARM64.MOVZ (ARM64.X3, uint16 b, 0) + ARM64.STRB (ARM64.X3, ARM64.SP, i) + ]) |> List.concat) + @ [ + // Write to stdout + ARM64.MOV_reg (ARM64.X1, ARM64.SP) // buffer + ARM64.MOVZ (ARM64.X2, uint16 len, 0) // length + ARM64.MOVZ (ARM64.X0, 1us, 0) // stdout = 1 + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + // Deallocate stack + ARM64.ADD_imm (ARM64.SP, ARM64.SP, uint16 stackSize) + ] + +/// Generate ARM64 instructions to print literal characters to stderr +let generatePrintCharsToStderr (chars: byte list) : ARM64.Instr list = + if List.isEmpty chars then [] else + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + let len = List.length chars + let stackSize = max 16 ((len + 15) / 16 * 16) + [ + ARM64.SUB_imm (ARM64.SP, ARM64.SP, uint16 stackSize) + ] + @ (chars |> List.mapi (fun i b -> + [ + ARM64.MOVZ (ARM64.X3, uint16 b, 0) + ARM64.STRB (ARM64.X3, ARM64.SP, i) + ]) |> List.concat) + @ [ + ARM64.MOV_reg (ARM64.X1, ARM64.SP) + ARM64.MOVZ (ARM64.X2, uint16 len, 0) + ARM64.MOVZ (ARM64.X0, 2us, 0) + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + ARM64.ADD_imm (ARM64.SP, ARM64.SP, uint16 stackSize) + ] + +/// Generate ARM64 instructions to print bytes as "\n" +/// Expects: X19 = bytes pointer (callee-saved) +/// Bytes layout: [length:8][data:N][refcount:8] +let generatePrintBytes () : ARM64.Instr list = + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + // Print "<" + [ + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 16us) + ARM64.MOVZ (ARM64.X3, uint16 (byte '<'), 0) + ARM64.STRB (ARM64.X3, ARM64.SP, 0) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.MOV_reg (ARM64.X1, ARM64.SP) + ARM64.MOVZ (ARM64.X2, 1us, 0) + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 16us) + // Load length from [X19] into X0 + ARM64.LDR (ARM64.X0, ARM64.X19, 0s) + ] + @ generatePrintInt64NoNewline () + @ [ + // Print " bytes>\n" (8 characters) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 16us) + ARM64.MOVZ (ARM64.X3, uint16 (byte ' '), 0) + ARM64.STRB (ARM64.X3, ARM64.SP, 0) + ARM64.MOVZ (ARM64.X3, uint16 (byte 'b'), 0) + ARM64.STRB (ARM64.X3, ARM64.SP, 1) + ARM64.MOVZ (ARM64.X3, uint16 (byte 'y'), 0) + ARM64.STRB (ARM64.X3, ARM64.SP, 2) + ARM64.MOVZ (ARM64.X3, uint16 (byte 't'), 0) + ARM64.STRB (ARM64.X3, ARM64.SP, 3) + ARM64.MOVZ (ARM64.X3, uint16 (byte 'e'), 0) + ARM64.STRB (ARM64.X3, ARM64.SP, 4) + ARM64.MOVZ (ARM64.X3, uint16 (byte 's'), 0) + ARM64.STRB (ARM64.X3, ARM64.SP, 5) + ARM64.MOVZ (ARM64.X3, uint16 (byte '>'), 0) + ARM64.STRB (ARM64.X3, ARM64.SP, 6) + ARM64.MOVZ (ARM64.X3, 10us, 0) + ARM64.STRB (ARM64.X3, ARM64.SP, 7) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.MOV_reg (ARM64.X1, ARM64.SP) + ARM64.MOVZ (ARM64.X2, 8us, 0) + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 16us) + ] + +/// Generate ARM64 instructions to perform write syscall only +/// +/// Assumes caller has set up: +/// - X0 = file descriptor (usually 1 for stdout) +/// - X1 = buffer pointer +/// - X2 = length +/// +/// Does NOT print newline or exit - caller handles those if needed +let generateWriteSyscall () : ARM64.Instr list = + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + [ + ARM64.MOVZ (syscalls.SyscallRegister, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + ] + +/// Generate ARM64 instructions for Stdlib.File.exists +/// Input: pathReg contains heap string pointer (format: [len:8][data:N]) +/// Output: destReg = 1 if file exists, 0 if not +/// +/// Algorithm: +/// 1. Get data pointer from heap string (path + 8) +/// 2. Save the path string to a null-terminated temp buffer on stack +/// 3. Call access(path, F_OK) or faccessat(AT_FDCWD, path, F_OK, 0) +/// 4. If syscall returns 0 (success), set dest = 1; else dest = 0 +let generateFileExists (destReg: ARM64.Reg) (pathReg: ARM64.Reg) : ARM64.Instr list = + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + + // We need to null-terminate the string for the syscall + // Stack layout: [saved regs:16][path:256] + // Use simpler approach: just copy the string and add null terminator + // Note: This is a simplification - paths > 255 chars will be truncated + match os with + | Platform.MacOS -> + [ + // Save callee-saved registers we'll use + ARM64.STP (ARM64.X19, ARM64.X20, ARM64.SP, -16s) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 16us) + + // Allocate stack space for path (256 bytes, 16-byte aligned) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 256us) + + // X19 = heap string base (pathReg), X20 = dest pointer for later + ARM64.MOV_reg (ARM64.X19, pathReg) + ARM64.MOV_reg (ARM64.X20, destReg) + + // Use non-allocatable registers for copy loop to avoid clobbering live values + // X10 = string length from [X19] + ARM64.LDR (ARM64.X10, ARM64.X19, 0s) + + // X9 = dest pointer (SP) + ARM64.MOV_reg (ARM64.X9, ARM64.SP) + // X11 = source pointer (X19 + 8) + ARM64.ADD_imm (ARM64.X11, ARM64.X19, 8us) + + // Copy loop: copies X10 bytes from X11 to X9 + // copy_loop (7 instructions, 0-6): + ARM64.CBZ_offset (ARM64.X10, 7) // 0: If length == 0, skip to null_term at inst 7 + ARM64.LDRB_imm (ARM64.X12, ARM64.X11, 0) // 1: Load byte from src + ARM64.STRB (ARM64.X12, ARM64.X9, 0) // 2: Store byte to dest + ARM64.ADD_imm (ARM64.X9, ARM64.X9, 1us) // 3: dest++ + ARM64.ADD_imm (ARM64.X11, ARM64.X11, 1us) // 4: src++ + ARM64.SUB_imm (ARM64.X10, ARM64.X10, 1us) // 5: len-- + ARM64.B (-6) // 6: Loop back to CBZ + + // null_term: Store null terminator at X9 + ARM64.MOVZ (ARM64.X12, 0us, 0) // 7: X12 = 0 + ARM64.STRB (ARM64.X12, ARM64.X9, 0) // 8: Store 0 as null terminator + + // Call access(path, F_OK) + // X0 = path (SP), X1 = mode (F_OK = 0) + ARM64.MOV_reg (ARM64.X0, ARM64.SP) + ARM64.MOVZ (ARM64.X1, 0us, 0) // F_OK = 0 + ARM64.MOVZ (ARM64.X16, syscalls.Numbers.Access, 0) // access syscall + ARM64.SVC syscalls.SvcImmediate + + // If X0 == 0, file exists; else doesn't + // Use CMP + CSET to convert to boolean + ARM64.CMP_imm (ARM64.X0, 0us) + ARM64.CSET (ARM64.X0, ARM64.EQ) // X0 = 1 if was 0, else 0 + + // Cleanup - restore registers before moving result to dest + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 256us) // Deallocate path buffer + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 16us) + ARM64.LDP (ARM64.X19, ARM64.X20, ARM64.SP, 0s) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 16us) + ARM64.MOV_reg (destReg, ARM64.X0) // Move result to dest after restoration + ] + | Platform.Linux -> + [ + // Save callee-saved registers we'll use, plus extra space for caller-saved + ARM64.STP (ARM64.X19, ARM64.X20, ARM64.SP, -16s) + ARM64.STP (ARM64.X21, ARM64.X22, ARM64.SP, -32s) // Save X21, X22 for preserving X1, X2 + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 32us) + + // Allocate stack space for path (256 bytes) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 256us) + + // X19 = heap string base (pathReg) + ARM64.MOV_reg (ARM64.X19, pathReg) + + // Save potentially live caller-saved registers (X1-X4) to callee-saved registers + // This preserves any values that might be allocated to these registers + ARM64.MOV_reg (ARM64.X21, ARM64.X1) // Save X1 + ARM64.MOV_reg (ARM64.X22, ARM64.X2) // Save X2 + + // Use non-allocatable registers for copy loop to avoid clobbering live values + // X10 = string length from [X19] + ARM64.LDR (ARM64.X10, ARM64.X19, 0s) + + // X9 = dest pointer (SP) + ARM64.MOV_reg (ARM64.X9, ARM64.SP) + // X11 = source pointer (X19 + 8) + ARM64.ADD_imm (ARM64.X11, ARM64.X19, 8us) + + // Copy loop (7 instructions, 0-6) + ARM64.CBZ_offset (ARM64.X10, 7) // 0: If length == 0, skip to null_term at inst 7 + ARM64.LDRB_imm (ARM64.X12, ARM64.X11, 0) // 1: Load byte from src + ARM64.STRB (ARM64.X12, ARM64.X9, 0) // 2: Store byte to dest + ARM64.ADD_imm (ARM64.X9, ARM64.X9, 1us) // 3: dest++ + ARM64.ADD_imm (ARM64.X11, ARM64.X11, 1us) // 4: src++ + ARM64.SUB_imm (ARM64.X10, ARM64.X10, 1us) // 5: len-- + ARM64.B (-6) // 6: Loop back to CBZ + + // null_term: Store null terminator + ARM64.MOVZ (ARM64.X12, 0us, 0) // 7: X12 = 0 + ARM64.STRB (ARM64.X12, ARM64.X9, 0) // 8: Store 0 as null terminator + + // Call faccessat(AT_FDCWD, path, F_OK, 0) + // X0 = dirfd (AT_FDCWD = -100), X1 = path, X2 = mode (F_OK = 0), X3 = flags (0) + ARM64.MOVZ (ARM64.X0, 100us, 0) + ARM64.NEG (ARM64.X0, ARM64.X0) // X0 = -100 (AT_FDCWD) + ARM64.MOV_reg (ARM64.X1, ARM64.SP) // path + ARM64.MOVZ (ARM64.X2, 0us, 0) // F_OK = 0 + ARM64.MOVZ (ARM64.X3, 0us, 0) // flags = 0 + ARM64.MOVZ (ARM64.X8, syscalls.Numbers.Access, 0) // faccessat syscall + ARM64.SVC syscalls.SvcImmediate + + // If X0 == 0, file exists; else doesn't + ARM64.CMP_imm (ARM64.X0, 0us) + ARM64.CSET (ARM64.X0, ARM64.EQ) + + // Restore caller-saved registers + ARM64.MOV_reg (ARM64.X1, ARM64.X21) // Restore X1 + ARM64.MOV_reg (ARM64.X2, ARM64.X22) // Restore X2 + + // Cleanup - restore callee-saved registers + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 256us) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 32us) + ARM64.LDP (ARM64.X21, ARM64.X22, ARM64.SP, 0s) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 16us) + ARM64.LDP (ARM64.X19, ARM64.X20, ARM64.SP, 0s) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 16us) + ARM64.MOV_reg (destReg, ARM64.X0) // Move result to dest after restoration + ] + +/// Generate ARM64 instructions to delete a file and return Result +/// destReg: destination register for the Result pointer +/// pathReg: register containing heap string pointer to file path +/// +/// Result memory layout: [tag:8][payload:8][refcount:8] = 24 bytes +/// - tag 0 = Ok, tag 1 = Error +/// - payload = pointer to value (0 for Unit, string pointer for Error) +let generateFileDelete (destReg: ARM64.Reg) (pathReg: ARM64.Reg) : ARM64.Instr list = + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + + match os with + | Platform.MacOS -> + [ + // Save callee-saved registers we'll use + ARM64.STP (ARM64.X19, ARM64.X20, ARM64.SP, -16s) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 16us) + + // Allocate stack space for path (256 bytes, 16-byte aligned) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 256us) + + // X19 = heap string base (pathReg), X20 = dest pointer for later + ARM64.MOV_reg (ARM64.X19, pathReg) + ARM64.MOV_reg (ARM64.X20, destReg) + + // X2 = string length from [X19] + ARM64.LDR (ARM64.X2, ARM64.X19, 0s) + + // X0 = dest pointer (SP) + ARM64.MOV_reg (ARM64.X0, ARM64.SP) + // X1 = source pointer (X19 + 8) + ARM64.ADD_imm (ARM64.X1, ARM64.X19, 8us) + // X4 = 0 (for LDRB offset) + ARM64.MOVZ (ARM64.X4, 0us, 0) + + // Copy loop: copies X2 bytes from X1 to X0 + // copy_loop (7 instructions, 0-6): + ARM64.CBZ_offset (ARM64.X2, 7) // 0: If length == 0, skip to null_term at inst 7 + ARM64.LDRB (ARM64.X3, ARM64.X1, ARM64.X4) // 1: Load byte from src [X1 + 0] + ARM64.STRB (ARM64.X3, ARM64.X0, 0) // 2: Store byte to dest + ARM64.ADD_imm (ARM64.X0, ARM64.X0, 1us) // 3: dest++ + ARM64.ADD_imm (ARM64.X1, ARM64.X1, 1us) // 4: src++ + ARM64.SUB_imm (ARM64.X2, ARM64.X2, 1us) // 5: len-- + ARM64.B (-6) // 6: Loop back to CBZ + + // null_term: Store null terminator at X0 + ARM64.MOVZ (ARM64.X3, 0us, 0) // X3 = 0 + ARM64.STRB (ARM64.X3, ARM64.X0, 0) // Store null terminator + + // Call unlink(path) + // X0 = path (SP) + ARM64.MOV_reg (ARM64.X0, ARM64.SP) + ARM64.MOVZ (ARM64.X16, syscalls.Numbers.Unlink, 0) // unlink syscall + ARM64.SVC syscalls.SvcImmediate + + // Save syscall result in X21 + ARM64.MOV_reg (ARM64.X21, ARM64.X0) + + // Allocate Result on heap: [tag:8][payload:8][refcount:8] = 24 bytes + ARM64.MOV_reg (ARM64.X0, ARM64.X28) // X0 = result pointer + ARM64.ADD_imm (ARM64.X28, ARM64.X28, 24us) // bump allocator + + // Check if unlink succeeded (X21 == 0) + ARM64.CMP_imm (ARM64.X21, 0us) + ARM64.B_cond (ARM64.NE, 6) // If failed, jump to error path + + // Success path: Result = Ok(()) + ARM64.MOVZ (ARM64.X1, 0us, 0) // tag = 0 (Ok) + ARM64.STR (ARM64.X1, ARM64.X0, 0s) // Store tag + ARM64.STR (ARM64.X1, ARM64.X0, 8s) // payload = 0 (Unit) + ARM64.MOVZ (ARM64.X1, 1us, 0) + ARM64.STR (ARM64.X1, ARM64.X0, 16s) // refcount = 1 + ARM64.B (26) // Jump to cleanup (skip 26 error path instructions) + + // Error path: Result = Error("Error") + // Allocate error string: "Error" (5 chars) + // String format: [length:8][data:N][refcount:8] + ARM64.MOV_reg (ARM64.X2, ARM64.X28) // X2 = error string pointer (1) + ARM64.ADD_imm (ARM64.X28, ARM64.X28, 24us) // (2) + ARM64.MOVZ (ARM64.X1, 5us, 0) // length = 5 (3) + ARM64.STR (ARM64.X1, ARM64.X2, 0s) // Store length (4) + // Store "Error" byte by byte: E=69, r=114, r=114, o=111, r=114 + ARM64.MOVZ (ARM64.X1, 69us, 0) // 'E' (5) + ARM64.ADD_imm (ARM64.X3, ARM64.X2, 8us) // (6) + ARM64.STRB_reg (ARM64.X1, ARM64.X3) // (7) + ARM64.MOVZ (ARM64.X1, 114us, 0) // 'r' (8) + ARM64.ADD_imm (ARM64.X3, ARM64.X2, 9us) // (9) + ARM64.STRB_reg (ARM64.X1, ARM64.X3) // (10) + ARM64.MOVZ (ARM64.X1, 114us, 0) // 'r' (11) + ARM64.ADD_imm (ARM64.X3, ARM64.X2, 10us) // (12) + ARM64.STRB_reg (ARM64.X1, ARM64.X3) // (13) + ARM64.MOVZ (ARM64.X1, 111us, 0) // 'o' (14) + ARM64.ADD_imm (ARM64.X3, ARM64.X2, 11us) // (15) + ARM64.STRB_reg (ARM64.X1, ARM64.X3) // (16) + ARM64.MOVZ (ARM64.X1, 114us, 0) // 'r' (17) + ARM64.ADD_imm (ARM64.X3, ARM64.X2, 12us) // (18) + ARM64.STRB_reg (ARM64.X1, ARM64.X3) // (19) + ARM64.MOVZ (ARM64.X1, 1us, 0) // (20) + ARM64.STR (ARM64.X1, ARM64.X2, 16s) // refcount = 1 (21) + // Now store Result with error + ARM64.MOVZ (ARM64.X1, 1us, 0) // tag = 1 (Error) (22) + ARM64.STR (ARM64.X1, ARM64.X0, 0s) // Store tag (23) + ARM64.STR (ARM64.X2, ARM64.X0, 8s) // payload = error string pointer (24) + ARM64.MOVZ (ARM64.X1, 1us, 0) // (25) + ARM64.STR (ARM64.X1, ARM64.X0, 16s) // refcount = 1 (26) + + // Cleanup - restore registers and move result to dest + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 256us) // Deallocate path buffer + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 16us) + ARM64.LDP (ARM64.X19, ARM64.X20, ARM64.SP, 0s) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 16us) + ARM64.MOV_reg (destReg, ARM64.X0) // Move result to dest after restoration + ] + | Platform.Linux -> + [ + // Save callee-saved registers we'll use + ARM64.STP (ARM64.X19, ARM64.X20, ARM64.SP, -16s) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 16us) + + // Allocate stack space for path (256 bytes) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 256us) + + // X19 = heap string base (pathReg) + ARM64.MOV_reg (ARM64.X19, pathReg) + + // X2 = string length from [X19] + ARM64.LDR (ARM64.X2, ARM64.X19, 0s) + + // X0 = dest pointer (SP) + ARM64.MOV_reg (ARM64.X0, ARM64.SP) + // X1 = source pointer (X19 + 8) + ARM64.ADD_imm (ARM64.X1, ARM64.X19, 8us) + // X4 = 0 (for LDRB offset) + ARM64.MOVZ (ARM64.X4, 0us, 0) + + // Copy loop (7 instructions, 0-6) + ARM64.CBZ_offset (ARM64.X2, 7) // 0: If length == 0, skip to null_term at inst 7 + ARM64.LDRB (ARM64.X3, ARM64.X1, ARM64.X4) + ARM64.STRB (ARM64.X3, ARM64.X0, 0) + ARM64.ADD_imm (ARM64.X0, ARM64.X0, 1us) + ARM64.ADD_imm (ARM64.X1, ARM64.X1, 1us) + ARM64.SUB_imm (ARM64.X2, ARM64.X2, 1us) + ARM64.B (-6) + + // null_term: Store null terminator + ARM64.MOVZ (ARM64.X3, 0us, 0) + ARM64.STRB (ARM64.X3, ARM64.X0, 0) + + // Call unlinkat(AT_FDCWD, path, 0) + // X0 = dirfd (AT_FDCWD = -100), X1 = path, X2 = flags (0) + ARM64.MOVZ (ARM64.X0, 100us, 0) + ARM64.NEG (ARM64.X0, ARM64.X0) // X0 = -100 (AT_FDCWD) + ARM64.MOV_reg (ARM64.X1, ARM64.SP) // path + ARM64.MOVZ (ARM64.X2, 0us, 0) // flags = 0 + ARM64.MOVZ (ARM64.X8, syscalls.Numbers.Unlink, 0) // unlinkat syscall + ARM64.SVC syscalls.SvcImmediate + + // Save syscall result in X21 + ARM64.MOV_reg (ARM64.X21, ARM64.X0) + + // Allocate Result on heap: [tag:8][payload:8][refcount:8] = 24 bytes + ARM64.MOV_reg (ARM64.X0, ARM64.X28) // X0 = result pointer + ARM64.ADD_imm (ARM64.X28, ARM64.X28, 24us) // bump allocator + + // Check if unlink succeeded (X21 == 0) + ARM64.CMP_imm (ARM64.X21, 0us) + ARM64.B_cond (ARM64.NE, 6) // If failed, jump to error path + + // Success path: Result = Ok(()) + ARM64.MOVZ (ARM64.X1, 0us, 0) // tag = 0 (Ok) + ARM64.STR (ARM64.X1, ARM64.X0, 0s) // Store tag + ARM64.STR (ARM64.X1, ARM64.X0, 8s) // payload = 0 (Unit) + ARM64.MOVZ (ARM64.X1, 1us, 0) + ARM64.STR (ARM64.X1, ARM64.X0, 16s) // refcount = 1 + ARM64.B (26) // Jump to cleanup (skip 26 error path instructions) + + // Error path: Result = Error("Error") + ARM64.MOV_reg (ARM64.X2, ARM64.X28) // X2 = error string pointer (1) + ARM64.ADD_imm (ARM64.X28, ARM64.X28, 24us) // (2) + ARM64.MOVZ (ARM64.X1, 5us, 0) // length = 5 (3) + ARM64.STR (ARM64.X1, ARM64.X2, 0s) // Store length (4) + // Store "Error" byte by byte: E=69, r=114, r=114, o=111, r=114 + ARM64.MOVZ (ARM64.X1, 69us, 0) // 'E' (5) + ARM64.ADD_imm (ARM64.X3, ARM64.X2, 8us) // (6) + ARM64.STRB_reg (ARM64.X1, ARM64.X3) // (7) + ARM64.MOVZ (ARM64.X1, 114us, 0) // 'r' (8) + ARM64.ADD_imm (ARM64.X3, ARM64.X2, 9us) // (9) + ARM64.STRB_reg (ARM64.X1, ARM64.X3) // (10) + ARM64.MOVZ (ARM64.X1, 114us, 0) // 'r' (11) + ARM64.ADD_imm (ARM64.X3, ARM64.X2, 10us) // (12) + ARM64.STRB_reg (ARM64.X1, ARM64.X3) // (13) + ARM64.MOVZ (ARM64.X1, 111us, 0) // 'o' (14) + ARM64.ADD_imm (ARM64.X3, ARM64.X2, 11us) // (15) + ARM64.STRB_reg (ARM64.X1, ARM64.X3) // (16) + ARM64.MOVZ (ARM64.X1, 114us, 0) // 'r' (17) + ARM64.ADD_imm (ARM64.X3, ARM64.X2, 12us) // (18) + ARM64.STRB_reg (ARM64.X1, ARM64.X3) // (19) + ARM64.MOVZ (ARM64.X1, 1us, 0) // (20) + ARM64.STR (ARM64.X1, ARM64.X2, 16s) // refcount = 1 (21) + ARM64.MOVZ (ARM64.X1, 1us, 0) // tag = 1 (Error) (22) + ARM64.STR (ARM64.X1, ARM64.X0, 0s) // Store tag (23) + ARM64.STR (ARM64.X2, ARM64.X0, 8s) // payload = error string pointer (24) + ARM64.MOVZ (ARM64.X1, 1us, 0) // (25) + ARM64.STR (ARM64.X1, ARM64.X0, 16s) // refcount = 1 (26) + + // Cleanup - restore registers and move result to dest + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 256us) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 16us) + ARM64.LDP (ARM64.X19, ARM64.X20, ARM64.SP, 0s) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 16us) + ARM64.MOV_reg (destReg, ARM64.X0) // Move result to dest after restoration + ] + +/// Generate ARM64 instructions to set executable permission on a file +/// destReg: destination register for the Result pointer +/// pathReg: register containing heap string pointer to file path +/// +/// Result memory layout: [tag:8][payload:8][refcount:8] = 24 bytes +/// - tag 0 = Ok, tag 1 = Error +/// - payload = pointer to value (0 for Unit, string pointer for Error) +let generateFileSetExecutable (destReg: ARM64.Reg) (pathReg: ARM64.Reg) : ARM64.Instr list = + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + + match os with + | Platform.MacOS -> + [ + // Save callee-saved registers we'll use + ARM64.STP (ARM64.X19, ARM64.X20, ARM64.SP, -16s) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 16us) + + // Allocate stack space for path (256 bytes, 16-byte aligned) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 256us) + + // X19 = heap string base (pathReg), X20 = dest pointer for later + ARM64.MOV_reg (ARM64.X19, pathReg) + ARM64.MOV_reg (ARM64.X20, destReg) + + // X2 = string length from [X19] + ARM64.LDR (ARM64.X2, ARM64.X19, 0s) + + // X0 = dest pointer (SP) + ARM64.MOV_reg (ARM64.X0, ARM64.SP) + // X1 = source pointer (X19 + 8) + ARM64.ADD_imm (ARM64.X1, ARM64.X19, 8us) + // X4 = 0 (for LDRB offset) + ARM64.MOVZ (ARM64.X4, 0us, 0) + + // Copy loop: copies X2 bytes from X1 to X0 + ARM64.CBZ_offset (ARM64.X2, 7) + ARM64.LDRB (ARM64.X3, ARM64.X1, ARM64.X4) + ARM64.STRB (ARM64.X3, ARM64.X0, 0) + ARM64.ADD_imm (ARM64.X0, ARM64.X0, 1us) + ARM64.ADD_imm (ARM64.X1, ARM64.X1, 1us) + ARM64.SUB_imm (ARM64.X2, ARM64.X2, 1us) + ARM64.B (-6) + + // null_term: Store null terminator at X0 + ARM64.MOVZ (ARM64.X3, 0us, 0) + ARM64.STRB (ARM64.X3, ARM64.X0, 0) + + // Call chmod(path, 0755) + // X0 = path (SP), X1 = mode (0755 = 493 in decimal) + ARM64.MOV_reg (ARM64.X0, ARM64.SP) + ARM64.MOVZ (ARM64.X1, 493us, 0) // 0755 = 493 + ARM64.MOVZ (ARM64.X16, syscalls.Numbers.Chmod, 0) + ARM64.SVC syscalls.SvcImmediate + + // Save syscall result in X21 + ARM64.MOV_reg (ARM64.X21, ARM64.X0) + + // Allocate Result on heap: [tag:8][payload:8][refcount:8] = 24 bytes + ARM64.MOV_reg (ARM64.X0, ARM64.X28) + ARM64.ADD_imm (ARM64.X28, ARM64.X28, 24us) + + // Check if chmod succeeded (X21 == 0) + ARM64.CMP_imm (ARM64.X21, 0us) + ARM64.B_cond (ARM64.NE, 6) + + // Success path: Result = Ok(()) + ARM64.MOVZ (ARM64.X1, 0us, 0) + ARM64.STR (ARM64.X1, ARM64.X0, 0s) + ARM64.STR (ARM64.X1, ARM64.X0, 8s) + ARM64.MOVZ (ARM64.X1, 1us, 0) + ARM64.STR (ARM64.X1, ARM64.X0, 16s) + ARM64.B (26) + + // Error path: Result = Error("Error") + ARM64.MOV_reg (ARM64.X2, ARM64.X28) + ARM64.ADD_imm (ARM64.X28, ARM64.X28, 24us) + ARM64.MOVZ (ARM64.X1, 5us, 0) + ARM64.STR (ARM64.X1, ARM64.X2, 0s) + ARM64.MOVZ (ARM64.X1, 69us, 0) // 'E' + ARM64.ADD_imm (ARM64.X3, ARM64.X2, 8us) + ARM64.STRB_reg (ARM64.X1, ARM64.X3) + ARM64.MOVZ (ARM64.X1, 114us, 0) // 'r' + ARM64.ADD_imm (ARM64.X3, ARM64.X2, 9us) + ARM64.STRB_reg (ARM64.X1, ARM64.X3) + ARM64.MOVZ (ARM64.X1, 114us, 0) // 'r' + ARM64.ADD_imm (ARM64.X3, ARM64.X2, 10us) + ARM64.STRB_reg (ARM64.X1, ARM64.X3) + ARM64.MOVZ (ARM64.X1, 111us, 0) // 'o' + ARM64.ADD_imm (ARM64.X3, ARM64.X2, 11us) + ARM64.STRB_reg (ARM64.X1, ARM64.X3) + ARM64.MOVZ (ARM64.X1, 114us, 0) // 'r' + ARM64.ADD_imm (ARM64.X3, ARM64.X2, 12us) + ARM64.STRB_reg (ARM64.X1, ARM64.X3) + ARM64.MOVZ (ARM64.X1, 1us, 0) + ARM64.STR (ARM64.X1, ARM64.X2, 16s) + ARM64.MOVZ (ARM64.X1, 1us, 0) + ARM64.STR (ARM64.X1, ARM64.X0, 0s) + ARM64.STR (ARM64.X2, ARM64.X0, 8s) + ARM64.MOVZ (ARM64.X1, 1us, 0) + ARM64.STR (ARM64.X1, ARM64.X0, 16s) + + // Cleanup + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 256us) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 16us) + ARM64.LDP (ARM64.X19, ARM64.X20, ARM64.SP, 0s) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 16us) + ARM64.MOV_reg (destReg, ARM64.X0) + ] + | Platform.Linux -> + [ + // Save callee-saved registers we'll use + ARM64.STP (ARM64.X19, ARM64.X20, ARM64.SP, -16s) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 16us) + + // Allocate stack space for path (256 bytes) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 256us) + + // X19 = heap string base (pathReg) + ARM64.MOV_reg (ARM64.X19, pathReg) + + // X2 = string length from [X19] + ARM64.LDR (ARM64.X2, ARM64.X19, 0s) + + // X0 = dest pointer (SP) + ARM64.MOV_reg (ARM64.X0, ARM64.SP) + // X1 = source pointer (X19 + 8) + ARM64.ADD_imm (ARM64.X1, ARM64.X19, 8us) + // X4 = 0 (for LDRB offset) + ARM64.MOVZ (ARM64.X4, 0us, 0) + + // Copy loop (7 instructions, 0-6) + ARM64.CBZ_offset (ARM64.X2, 7) + ARM64.LDRB (ARM64.X3, ARM64.X1, ARM64.X4) + ARM64.STRB (ARM64.X3, ARM64.X0, 0) + ARM64.ADD_imm (ARM64.X0, ARM64.X0, 1us) + ARM64.ADD_imm (ARM64.X1, ARM64.X1, 1us) + ARM64.SUB_imm (ARM64.X2, ARM64.X2, 1us) + ARM64.B (-6) + + // null_term: Store null terminator + ARM64.MOVZ (ARM64.X3, 0us, 0) + ARM64.STRB (ARM64.X3, ARM64.X0, 0) + + // Call fchmodat(AT_FDCWD, path, 0755, 0) + // X0 = dirfd (AT_FDCWD = -100), X1 = path, X2 = mode (0755 = 493), X3 = flags (0) + ARM64.MOVZ (ARM64.X0, 100us, 0) + ARM64.NEG (ARM64.X0, ARM64.X0) + ARM64.MOV_reg (ARM64.X1, ARM64.SP) + ARM64.MOVZ (ARM64.X2, 493us, 0) // 0755 = 493 + ARM64.MOVZ (ARM64.X3, 0us, 0) + ARM64.MOVZ (ARM64.X8, syscalls.Numbers.Chmod, 0) + ARM64.SVC syscalls.SvcImmediate + + // Save syscall result in X21 + ARM64.MOV_reg (ARM64.X21, ARM64.X0) + + // Allocate Result on heap + ARM64.MOV_reg (ARM64.X0, ARM64.X28) + ARM64.ADD_imm (ARM64.X28, ARM64.X28, 24us) + + // Check if chmod succeeded (X21 == 0) + ARM64.CMP_imm (ARM64.X21, 0us) + ARM64.B_cond (ARM64.NE, 6) + + // Success path: Result = Ok(()) + ARM64.MOVZ (ARM64.X1, 0us, 0) + ARM64.STR (ARM64.X1, ARM64.X0, 0s) + ARM64.STR (ARM64.X1, ARM64.X0, 8s) + ARM64.MOVZ (ARM64.X1, 1us, 0) + ARM64.STR (ARM64.X1, ARM64.X0, 16s) + ARM64.B (26) + + // Error path: Result = Error("Error") + ARM64.MOV_reg (ARM64.X2, ARM64.X28) + ARM64.ADD_imm (ARM64.X28, ARM64.X28, 24us) + ARM64.MOVZ (ARM64.X1, 5us, 0) + ARM64.STR (ARM64.X1, ARM64.X2, 0s) + ARM64.MOVZ (ARM64.X1, 69us, 0) // 'E' + ARM64.ADD_imm (ARM64.X3, ARM64.X2, 8us) + ARM64.STRB_reg (ARM64.X1, ARM64.X3) + ARM64.MOVZ (ARM64.X1, 114us, 0) // 'r' + ARM64.ADD_imm (ARM64.X3, ARM64.X2, 9us) + ARM64.STRB_reg (ARM64.X1, ARM64.X3) + ARM64.MOVZ (ARM64.X1, 114us, 0) // 'r' + ARM64.ADD_imm (ARM64.X3, ARM64.X2, 10us) + ARM64.STRB_reg (ARM64.X1, ARM64.X3) + ARM64.MOVZ (ARM64.X1, 111us, 0) // 'o' + ARM64.ADD_imm (ARM64.X3, ARM64.X2, 11us) + ARM64.STRB_reg (ARM64.X1, ARM64.X3) + ARM64.MOVZ (ARM64.X1, 114us, 0) // 'r' + ARM64.ADD_imm (ARM64.X3, ARM64.X2, 12us) + ARM64.STRB_reg (ARM64.X1, ARM64.X3) + ARM64.MOVZ (ARM64.X1, 1us, 0) + ARM64.STR (ARM64.X1, ARM64.X2, 16s) + ARM64.MOVZ (ARM64.X1, 1us, 0) + ARM64.STR (ARM64.X1, ARM64.X0, 0s) + ARM64.STR (ARM64.X2, ARM64.X0, 8s) + ARM64.MOVZ (ARM64.X1, 1us, 0) + ARM64.STR (ARM64.X1, ARM64.X0, 16s) + + // Cleanup + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 256us) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 16us) + ARM64.LDP (ARM64.X19, ARM64.X20, ARM64.SP, 0s) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 16us) + ARM64.MOV_reg (destReg, ARM64.X0) + ] + +/// Generate ARM64 instructions to read file contents and return Result +/// destReg: destination register for the Result pointer +/// pathReg: register containing heap string pointer to file path +/// +/// Result memory layout: [tag:8][payload:8][refcount:8] = 24 bytes +/// - tag 0 = Ok, tag 1 = Error +/// - payload = pointer to string +/// +/// String memory layout: [length:8][data:N][refcount:8] +/// +/// Algorithm: +/// 1. Copy path to stack with null terminator (same as FileExists) +/// 2. open() syscall - if fails, return Error("File not found") +/// 3. fstat() syscall - get file size +/// 4. Allocate string buffer on heap +/// 5. read() syscall - read file contents +/// 6. close() syscall +/// 7. Construct Result with Ok(string) or Error(message) +let generateFileReadText (destReg: ARM64.Reg) (pathReg: ARM64.Reg) : ARM64.Instr list = + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + + // For now, implement a simplified version that: + // - Opens the file + // - Reads up to 4096 bytes + // - Returns Ok(contents) or Error("File not found") + // + // Stack layout: [saved X19-X25: 64][stat buffer: 144][path: 256][padding: 16] = 480 bytes + // (stat buffer is 128 bytes on Linux, 144 on macOS - use 144 for safety) + match os with + | Platform.Linux -> + [ + // Save callee-saved registers + ARM64.STP (ARM64.X19, ARM64.X20, ARM64.SP, -16s) + ARM64.STP (ARM64.X21, ARM64.X22, ARM64.SP, -32s) + ARM64.STP (ARM64.X23, ARM64.X24, ARM64.SP, -48s) + ARM64.STP (ARM64.X25, ARM64.X26, ARM64.SP, -64s) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 64us) + + // Allocate stack space for: stat buffer (144) + path (256) + caller-saved (64) = 464 bytes + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 255us) // Can only sub 255 at a time + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 209us) // Total: 464 bytes + + // X19 = path heap string, X20 = dest register, X21 = file descriptor + ARM64.MOV_reg (ARM64.X19, pathReg) + ARM64.MOV_reg (ARM64.X20, destReg) + + // Save ALL potentially live caller-saved registers (X1-X8) at SP+400 + ARM64.STR (ARM64.X1, ARM64.SP, 400s) + ARM64.STR (ARM64.X2, ARM64.SP, 408s) + ARM64.STR (ARM64.X3, ARM64.SP, 416s) + ARM64.STR (ARM64.X4, ARM64.SP, 424s) + ARM64.STR (ARM64.X5, ARM64.SP, 432s) + ARM64.STR (ARM64.X6, ARM64.SP, 440s) + ARM64.STR (ARM64.X7, ARM64.SP, 448s) + ARM64.STR (ARM64.X8, ARM64.SP, 456s) + + // Use non-allocatable registers for copy loop + // X10 = string length from heap string + ARM64.LDR (ARM64.X10, ARM64.X19, 0s) + + // X9 = stack dest for null-terminated path (SP + 144 for after stat buffer) + ARM64.ADD_imm (ARM64.X9, ARM64.SP, 144us) + // X11 = heap string data (X19 + 8) + ARM64.ADD_imm (ARM64.X11, ARM64.X19, 8us) + + // Copy loop (7 instructions, 0-6) + ARM64.CBZ_offset (ARM64.X10, 7) // 0: If length == 0, skip to null_term + ARM64.LDRB_imm (ARM64.X12, ARM64.X11, 0) + ARM64.STRB (ARM64.X12, ARM64.X9, 0) + ARM64.ADD_imm (ARM64.X9, ARM64.X9, 1us) + ARM64.ADD_imm (ARM64.X11, ARM64.X11, 1us) + ARM64.SUB_imm (ARM64.X10, ARM64.X10, 1us) + ARM64.B (-6) + + // Store null terminator + ARM64.MOVZ (ARM64.X12, 0us, 0) + ARM64.STRB (ARM64.X12, ARM64.X9, 0) + + // openat(AT_FDCWD, path, O_RDONLY, 0) + // X0 = dirfd (AT_FDCWD = -100) + ARM64.MOVZ (ARM64.X0, 100us, 0) + ARM64.NEG (ARM64.X0, ARM64.X0) + // X1 = path + ARM64.ADD_imm (ARM64.X1, ARM64.SP, 144us) + // X2 = flags (O_RDONLY = 0) + ARM64.MOVZ (ARM64.X2, 0us, 0) + // X3 = mode (not used for O_RDONLY) + ARM64.MOVZ (ARM64.X3, 0us, 0) + // syscall + ARM64.MOVZ (ARM64.X8, syscalls.Numbers.Open, 0) + ARM64.SVC syscalls.SvcImmediate + + // Check if open failed (fd < 0 means X0 has sign bit set) + // X21 = fd + ARM64.MOV_reg (ARM64.X21, ARM64.X0) + ARM64.TBNZ (ARM64.X0, 63, 31) // If negative, branch to error path (+31 instructions) + + // fstat(fd, statbuf) - X0 = fd, X1 = statbuf + ARM64.MOV_reg (ARM64.X0, ARM64.X21) + ARM64.MOV_reg (ARM64.X1, ARM64.SP) // stat buffer at SP + ARM64.MOVZ (ARM64.X8, syscalls.Numbers.Fstat, 0) + ARM64.SVC syscalls.SvcImmediate + + // Get file size from stat buffer (st_size is at offset 48 on Linux ARM64) + ARM64.LDR (ARM64.X22, ARM64.SP, 48s) // X22 = file size + + // Allocate heap space for string: [len:8][data:N][refcount:8] + // Size = 8 + size + 8 = size + 16, round up to next 8 bytes + // Simpler: just add 24 (16 + 8 for alignment padding) + ARM64.ADD_imm (ARM64.X23, ARM64.X22, 24us) // X23 = size + 24 (with padding) + + // Allocate from heap (bump allocator) + ARM64.MOV_reg (ARM64.X24, ARM64.X28) // X24 = string pointer + ARM64.ADD_reg (ARM64.X28, ARM64.X28, ARM64.X23) // bump heap pointer + + // Store length at [X24] + ARM64.STR (ARM64.X22, ARM64.X24, 0s) + + // read(fd, buf, count) - read file contents + ARM64.MOV_reg (ARM64.X0, ARM64.X21) // fd + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 8us) // buf = string data area + ARM64.MOV_reg (ARM64.X2, ARM64.X22) // count = file size + ARM64.MOVZ (ARM64.X8, syscalls.Numbers.Read, 0) + ARM64.SVC syscalls.SvcImmediate + + // Store refcount = 1 at [X24 + 8 + size] + ARM64.ADD_imm (ARM64.X25, ARM64.X24, 8us) + ARM64.ADD_reg (ARM64.X25, ARM64.X25, ARM64.X22) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.STR (ARM64.X0, ARM64.X25, 0s) + + // close(fd) + ARM64.MOV_reg (ARM64.X0, ARM64.X21) + ARM64.MOVZ (ARM64.X8, syscalls.Numbers.Close, 0) + ARM64.SVC syscalls.SvcImmediate + + // Allocate Result: [tag:8][payload:8][refcount:8] = 24 bytes + ARM64.MOV_reg (ARM64.X25, ARM64.X28) // X25 = Result pointer + ARM64.ADD_imm (ARM64.X28, ARM64.X28, 24us) // bump heap + + // Store Ok tag (0) + ARM64.MOVZ (ARM64.X0, 0us, 0) + ARM64.STR (ARM64.X0, ARM64.X25, 0s) // tag = 0 + + // Store string pointer as payload + ARM64.STR (ARM64.X24, ARM64.X25, 8s) // payload = string ptr + + // Store refcount = 1 + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.STR (ARM64.X0, ARM64.X25, 16s) + + // Move result to dest + ARM64.MOV_reg (ARM64.X20, ARM64.X25) + + // Jump to cleanup + ARM64.B 30 // Skip error path (29 instructions + 1 to land on cleanup) + + // === Error path (file not found) === + // Create error string "File not found" and Error result + // For simplicity, create a short error message + + // Allocate error string: "Error" = 5 chars + len + refcount = 24 bytes + ARM64.MOV_reg (ARM64.X24, ARM64.X28) // X24 = error string + ARM64.ADD_imm (ARM64.X28, ARM64.X28, 24us) + + // Store length = 5 + ARM64.MOVZ (ARM64.X0, 5us, 0) + ARM64.STR (ARM64.X0, ARM64.X24, 0s) + + // Store "Error" (ASCII: 69, 114, 114, 111, 114) + // E=69, r=114, r=114, o=111, r=114 + // Store at [X24+8] through [X24+12] + ARM64.MOVZ (ARM64.X0, 69us, 0) // 'E' + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 8us) + ARM64.STRB_reg (ARM64.X0, ARM64.X1) + + ARM64.MOVZ (ARM64.X0, 114us, 0) // 'r' + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 9us) + ARM64.STRB_reg (ARM64.X0, ARM64.X1) + + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 10us) + ARM64.STRB_reg (ARM64.X0, ARM64.X1) + + ARM64.MOVZ (ARM64.X0, 111us, 0) // 'o' + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 11us) + ARM64.STRB_reg (ARM64.X0, ARM64.X1) + + ARM64.MOVZ (ARM64.X0, 114us, 0) // 'r' + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 12us) + ARM64.STRB_reg (ARM64.X0, ARM64.X1) + + // Store refcount = 1 at [X24 + 8 + 5] = [X24 + 13] + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 13us) + ARM64.STR (ARM64.X0, ARM64.X1, 0s) + + // Allocate Error Result + ARM64.MOV_reg (ARM64.X25, ARM64.X28) + ARM64.ADD_imm (ARM64.X28, ARM64.X28, 24us) + + // Store Error tag (1) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.STR (ARM64.X0, ARM64.X25, 0s) + + // Store error string as payload + ARM64.STR (ARM64.X24, ARM64.X25, 8s) + + // Store refcount = 1 + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.STR (ARM64.X0, ARM64.X25, 16s) + + // Move result to dest + ARM64.MOV_reg (ARM64.X20, ARM64.X25) + + // === Cleanup - save result to X0 before restoring callee-saved registers === + ARM64.MOV_reg (ARM64.X0, ARM64.X20) + + // Restore ALL caller-saved registers (X1-X8) we saved at start + ARM64.LDR (ARM64.X1, ARM64.SP, 400s) + ARM64.LDR (ARM64.X2, ARM64.SP, 408s) + ARM64.LDR (ARM64.X3, ARM64.SP, 416s) + ARM64.LDR (ARM64.X4, ARM64.SP, 424s) + ARM64.LDR (ARM64.X5, ARM64.SP, 432s) + ARM64.LDR (ARM64.X6, ARM64.SP, 440s) + ARM64.LDR (ARM64.X7, ARM64.SP, 448s) + ARM64.LDR (ARM64.X8, ARM64.SP, 456s) + + // Deallocate 464-byte stack buffer + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 255us) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 209us) + + // Restore callee-saved registers + ARM64.LDP (ARM64.X25, ARM64.X26, ARM64.SP, 0s) + ARM64.LDP (ARM64.X23, ARM64.X24, ARM64.SP, 16s) + ARM64.LDP (ARM64.X21, ARM64.X22, ARM64.SP, 32s) + ARM64.LDP (ARM64.X19, ARM64.X20, ARM64.SP, 48s) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 64us) + ARM64.MOV_reg (destReg, ARM64.X0) // Move result to dest after restoration + ] + | Platform.MacOS -> + // macOS version - similar structure with different syscall numbers + [ + // Save callee-saved registers + ARM64.STP (ARM64.X19, ARM64.X20, ARM64.SP, -16s) + ARM64.STP (ARM64.X21, ARM64.X22, ARM64.SP, -32s) + ARM64.STP (ARM64.X23, ARM64.X24, ARM64.SP, -48s) + ARM64.STP (ARM64.X25, ARM64.X26, ARM64.SP, -64s) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 64us) + + // Allocate stack: stat buffer (144) + path (256) + caller-saved (64) = 464 bytes + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 255us) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 209us) + + ARM64.MOV_reg (ARM64.X19, pathReg) + ARM64.MOV_reg (ARM64.X20, destReg) + + // Save ALL potentially live caller-saved registers (X1-X8) at SP+400 + ARM64.STR (ARM64.X1, ARM64.SP, 400s) + ARM64.STR (ARM64.X2, ARM64.SP, 408s) + ARM64.STR (ARM64.X3, ARM64.SP, 416s) + ARM64.STR (ARM64.X4, ARM64.SP, 424s) + ARM64.STR (ARM64.X5, ARM64.SP, 432s) + ARM64.STR (ARM64.X6, ARM64.SP, 440s) + ARM64.STR (ARM64.X7, ARM64.SP, 448s) + ARM64.STR (ARM64.X8, ARM64.SP, 456s) + + // Copy path with null terminator using non-allocatable registers + // X10 = string length + ARM64.LDR (ARM64.X10, ARM64.X19, 0s) + // X9 = dest (SP + 144) + ARM64.ADD_imm (ARM64.X9, ARM64.SP, 144us) + // X11 = source (X19 + 8) + ARM64.ADD_imm (ARM64.X11, ARM64.X19, 8us) + + // Copy loop (7 instructions, 0-6) + ARM64.CBZ_offset (ARM64.X10, 7) + ARM64.LDRB_imm (ARM64.X12, ARM64.X11, 0) + ARM64.STRB (ARM64.X12, ARM64.X9, 0) + ARM64.ADD_imm (ARM64.X9, ARM64.X9, 1us) + ARM64.ADD_imm (ARM64.X11, ARM64.X11, 1us) + ARM64.SUB_imm (ARM64.X10, ARM64.X10, 1us) + ARM64.B (-6) + + // Store null terminator + ARM64.MOVZ (ARM64.X12, 0us, 0) + ARM64.STRB (ARM64.X12, ARM64.X9, 0) + + // open(path, O_RDONLY) + ARM64.ADD_imm (ARM64.X0, ARM64.SP, 144us) + ARM64.MOVZ (ARM64.X1, 0us, 0) // O_RDONLY + ARM64.MOVZ (ARM64.X16, syscalls.Numbers.Open, 0) + ARM64.SVC syscalls.SvcImmediate + + ARM64.MOV_reg (ARM64.X21, ARM64.X0) + ARM64.TBNZ (ARM64.X0, 63, 31) // If negative, branch to error path + + // fstat(fd, statbuf) + ARM64.MOV_reg (ARM64.X0, ARM64.X21) + ARM64.MOV_reg (ARM64.X1, ARM64.SP) + ARM64.MOVZ (ARM64.X16, syscalls.Numbers.Fstat, 0) + ARM64.SVC syscalls.SvcImmediate + + // st_size at offset 96 on macOS + ARM64.LDR (ARM64.X22, ARM64.SP, 96s) + + // Allocate string: size + 24 (with padding for alignment) + ARM64.ADD_imm (ARM64.X23, ARM64.X22, 24us) + + ARM64.MOV_reg (ARM64.X24, ARM64.X28) + ARM64.ADD_reg (ARM64.X28, ARM64.X28, ARM64.X23) + + ARM64.STR (ARM64.X22, ARM64.X24, 0s) + + // read + ARM64.MOV_reg (ARM64.X0, ARM64.X21) + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 8us) + ARM64.MOV_reg (ARM64.X2, ARM64.X22) + ARM64.MOVZ (ARM64.X16, syscalls.Numbers.Read, 0) + ARM64.SVC syscalls.SvcImmediate + + ARM64.ADD_imm (ARM64.X25, ARM64.X24, 8us) + ARM64.ADD_reg (ARM64.X25, ARM64.X25, ARM64.X22) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.STR (ARM64.X0, ARM64.X25, 0s) + + // close + ARM64.MOV_reg (ARM64.X0, ARM64.X21) + ARM64.MOVZ (ARM64.X16, syscalls.Numbers.Close, 0) + ARM64.SVC syscalls.SvcImmediate + + // Allocate Result + ARM64.MOV_reg (ARM64.X25, ARM64.X28) + ARM64.ADD_imm (ARM64.X28, ARM64.X28, 24us) + + ARM64.MOVZ (ARM64.X0, 0us, 0) + ARM64.STR (ARM64.X0, ARM64.X25, 0s) + ARM64.STR (ARM64.X24, ARM64.X25, 8s) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.STR (ARM64.X0, ARM64.X25, 16s) + + ARM64.MOV_reg (ARM64.X20, ARM64.X25) + + ARM64.B 30 // Skip error path (29 instructions + 1 to land on cleanup) + + // Error path (same as Linux) + ARM64.MOV_reg (ARM64.X24, ARM64.X28) + ARM64.ADD_imm (ARM64.X28, ARM64.X28, 24us) + + ARM64.MOVZ (ARM64.X0, 5us, 0) + ARM64.STR (ARM64.X0, ARM64.X24, 0s) + + ARM64.MOVZ (ARM64.X0, 69us, 0) + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 8us) + ARM64.STRB_reg (ARM64.X0, ARM64.X1) + + ARM64.MOVZ (ARM64.X0, 114us, 0) + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 9us) + ARM64.STRB_reg (ARM64.X0, ARM64.X1) + + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 10us) + ARM64.STRB_reg (ARM64.X0, ARM64.X1) + + ARM64.MOVZ (ARM64.X0, 111us, 0) + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 11us) + ARM64.STRB_reg (ARM64.X0, ARM64.X1) + + ARM64.MOVZ (ARM64.X0, 114us, 0) + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 12us) + ARM64.STRB_reg (ARM64.X0, ARM64.X1) + + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 13us) + ARM64.STR (ARM64.X0, ARM64.X1, 0s) + + ARM64.MOV_reg (ARM64.X25, ARM64.X28) + ARM64.ADD_imm (ARM64.X28, ARM64.X28, 24us) + + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.STR (ARM64.X0, ARM64.X25, 0s) + ARM64.STR (ARM64.X24, ARM64.X25, 8s) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.STR (ARM64.X0, ARM64.X25, 16s) + + ARM64.MOV_reg (ARM64.X20, ARM64.X25) + + // Cleanup - save result to X0 before restoring callee-saved registers + ARM64.MOV_reg (ARM64.X0, ARM64.X20) + + // Restore ALL caller-saved registers (X1-X8) we saved at start + ARM64.LDR (ARM64.X1, ARM64.SP, 400s) + ARM64.LDR (ARM64.X2, ARM64.SP, 408s) + ARM64.LDR (ARM64.X3, ARM64.SP, 416s) + ARM64.LDR (ARM64.X4, ARM64.SP, 424s) + ARM64.LDR (ARM64.X5, ARM64.SP, 432s) + ARM64.LDR (ARM64.X6, ARM64.SP, 440s) + ARM64.LDR (ARM64.X7, ARM64.SP, 448s) + ARM64.LDR (ARM64.X8, ARM64.SP, 456s) + + // Deallocate 464-byte stack buffer + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 255us) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 209us) + + ARM64.LDP (ARM64.X25, ARM64.X26, ARM64.SP, 0s) + ARM64.LDP (ARM64.X23, ARM64.X24, ARM64.SP, 16s) + ARM64.LDP (ARM64.X21, ARM64.X22, ARM64.SP, 32s) + ARM64.LDP (ARM64.X19, ARM64.X20, ARM64.SP, 48s) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 64us) + ARM64.MOV_reg (destReg, ARM64.X0) // Move result to dest after restoration + ] + +/// Generate ARM64 instructions to write content to a file +/// pathReg: register containing pointer to heap string (path) +/// contentReg: register containing pointer to heap string (content) +/// append: if true, append to file; if false, overwrite +/// Returns Result in destReg +/// On success, result contains Ok(()) - tag=0, payload=0 +/// On failure, result contains Error("Error") - tag=1, payload=error string ptr +let generateFileWriteText (destReg: ARM64.Reg) (pathReg: ARM64.Reg) (contentReg: ARM64.Reg) (append: bool) : ARM64.Instr list = + // Get platform and syscalls + let os = + match Platform.detectOS () with + | Ok os -> os + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + + // Open flags: + // Write: O_WRONLY | O_CREAT | O_TRUNC + // Append: O_WRONLY | O_CREAT | O_APPEND + // Linux: O_WRONLY=1, O_CREAT=64, O_TRUNC=512, O_APPEND=1024 + // macOS: O_WRONLY=1, O_CREAT=0x200, O_TRUNC=0x400, O_APPEND=8 + let (writeFlags, appendFlags) = + match os with + | Platform.Linux -> (577us, 1089us) // 1|64|512, 1|64|1024 + | Platform.MacOS -> (1537us, 521us) // 1|0x200|0x400, 1|0x200|8 + let flags = if append then appendFlags else writeFlags + + match os with + | Platform.Linux -> + [ + // Save callee-saved registers + ARM64.STP (ARM64.X19, ARM64.X20, ARM64.SP, -16s) + ARM64.STP (ARM64.X21, ARM64.X22, ARM64.SP, -32s) + ARM64.STP (ARM64.X23, ARM64.X24, ARM64.SP, -48s) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 48us) + + // Allocate stack for path buffer (256) + caller-saved regs (64) = 320 bytes + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 255us) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 65us) + + // Save path and content pointers + ARM64.MOV_reg (ARM64.X19, pathReg) + ARM64.MOV_reg (ARM64.X22, contentReg) + + // Save ALL potentially live caller-saved registers (X1-X8) at SP+256 + ARM64.STR (ARM64.X1, ARM64.SP, 256s) + ARM64.STR (ARM64.X2, ARM64.SP, 264s) + ARM64.STR (ARM64.X3, ARM64.SP, 272s) + ARM64.STR (ARM64.X4, ARM64.SP, 280s) + ARM64.STR (ARM64.X5, ARM64.SP, 288s) + ARM64.STR (ARM64.X6, ARM64.SP, 296s) + ARM64.STR (ARM64.X7, ARM64.SP, 304s) + ARM64.STR (ARM64.X8, ARM64.SP, 312s) + + // Copy path to stack buffer with null terminator using non-allocatable registers + // X10 = path length + ARM64.LDR (ARM64.X10, ARM64.X19, 0s) + // X9 = dest buffer (SP) + ARM64.MOV_reg (ARM64.X9, ARM64.SP) + // X11 = source data (X19 + 8) + ARM64.ADD_imm (ARM64.X11, ARM64.X19, 8us) + + // Copy loop (7 instructions, 0-6) + ARM64.CBZ_offset (ARM64.X10, 7) + ARM64.LDRB_imm (ARM64.X12, ARM64.X11, 0) + ARM64.STRB (ARM64.X12, ARM64.X9, 0) + ARM64.ADD_imm (ARM64.X9, ARM64.X9, 1us) + ARM64.ADD_imm (ARM64.X11, ARM64.X11, 1us) + ARM64.SUB_imm (ARM64.X10, ARM64.X10, 1us) + ARM64.B (-6) + + // Store null terminator + ARM64.MOVZ (ARM64.X12, 0us, 0) + ARM64.STRB (ARM64.X12, ARM64.X9, 0) + + // openat(AT_FDCWD, path, flags, mode) + ARM64.MOVZ (ARM64.X0, 100us, 0) + ARM64.NEG (ARM64.X0, ARM64.X0) // AT_FDCWD = -100 + ARM64.MOV_reg (ARM64.X1, ARM64.SP) // path + ARM64.MOVZ (ARM64.X2, flags, 0) // flags + ARM64.MOVZ (ARM64.X3, 420us, 0) // mode 0644 + ARM64.MOVZ (ARM64.X8, syscalls.Numbers.Open, 0) + ARM64.SVC syscalls.SvcImmediate + + // Check if open failed + ARM64.MOV_reg (ARM64.X21, ARM64.X0) // X21 = fd + ARM64.TBNZ (ARM64.X0, 63, 18) // If negative, branch to error path (17 instructions + 1) + + // write(fd, buf, count) + ARM64.MOV_reg (ARM64.X0, ARM64.X21) // fd + ARM64.ADD_imm (ARM64.X1, ARM64.X22, 8us) // buf = content data + ARM64.LDR (ARM64.X2, ARM64.X22, 0s) // count = content length + ARM64.MOVZ (ARM64.X8, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + + // close(fd) + ARM64.MOV_reg (ARM64.X0, ARM64.X21) + ARM64.MOVZ (ARM64.X8, syscalls.Numbers.Close, 0) + ARM64.SVC syscalls.SvcImmediate + + // Allocate Ok Result: [tag=0][payload=0][refcount=1] + ARM64.MOV_reg (ARM64.X23, ARM64.X28) + ARM64.ADD_imm (ARM64.X28, ARM64.X28, 24us) + ARM64.MOVZ (ARM64.X0, 0us, 0) + ARM64.STR (ARM64.X0, ARM64.X23, 0s) // tag = 0 (Ok) + ARM64.STR (ARM64.X0, ARM64.X23, 8s) // payload = 0 (Unit) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.STR (ARM64.X0, ARM64.X23, 16s) // refcount = 1 + ARM64.MOV_reg (ARM64.X20, ARM64.X23) + ARM64.B 30 // Jump to cleanup (skip 29 error path instructions + 1) + + // Error path: Create Error("Error") result + ARM64.MOV_reg (ARM64.X24, ARM64.X28) + ARM64.ADD_imm (ARM64.X28, ARM64.X28, 24us) + + ARM64.MOVZ (ARM64.X0, 5us, 0) // length = 5 + ARM64.STR (ARM64.X0, ARM64.X24, 0s) + + // Store "Error" bytes + ARM64.MOVZ (ARM64.X0, 69us, 0) // 'E' + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 8us) + ARM64.STRB_reg (ARM64.X0, ARM64.X1) + ARM64.MOVZ (ARM64.X0, 114us, 0) // 'r' + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 9us) + ARM64.STRB_reg (ARM64.X0, ARM64.X1) + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 10us) + ARM64.STRB_reg (ARM64.X0, ARM64.X1) + ARM64.MOVZ (ARM64.X0, 111us, 0) // 'o' + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 11us) + ARM64.STRB_reg (ARM64.X0, ARM64.X1) + ARM64.MOVZ (ARM64.X0, 114us, 0) // 'r' + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 12us) + ARM64.STRB_reg (ARM64.X0, ARM64.X1) + + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 13us) + ARM64.STR (ARM64.X0, ARM64.X1, 0s) // refcount + + // Allocate Error Result + ARM64.MOV_reg (ARM64.X23, ARM64.X28) + ARM64.ADD_imm (ARM64.X28, ARM64.X28, 24us) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.STR (ARM64.X0, ARM64.X23, 0s) // tag = 1 (Error) + ARM64.STR (ARM64.X24, ARM64.X23, 8s) // payload = error string + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.STR (ARM64.X0, ARM64.X23, 16s) // refcount + ARM64.MOV_reg (ARM64.X20, ARM64.X23) + + // Cleanup - save result to X0 before restoring callee-saved registers + ARM64.MOV_reg (ARM64.X0, ARM64.X20) + + // Restore ALL caller-saved registers (X1-X8) we saved at start + ARM64.LDR (ARM64.X1, ARM64.SP, 256s) + ARM64.LDR (ARM64.X2, ARM64.SP, 264s) + ARM64.LDR (ARM64.X3, ARM64.SP, 272s) + ARM64.LDR (ARM64.X4, ARM64.SP, 280s) + ARM64.LDR (ARM64.X5, ARM64.SP, 288s) + ARM64.LDR (ARM64.X6, ARM64.SP, 296s) + ARM64.LDR (ARM64.X7, ARM64.SP, 304s) + ARM64.LDR (ARM64.X8, ARM64.SP, 312s) + + // Deallocate 320-byte stack buffer + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 255us) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 65us) + ARM64.LDP (ARM64.X23, ARM64.X24, ARM64.SP, 0s) + ARM64.LDP (ARM64.X21, ARM64.X22, ARM64.SP, 16s) + ARM64.LDP (ARM64.X19, ARM64.X20, ARM64.SP, 32s) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 48us) + ARM64.MOV_reg (destReg, ARM64.X0) // Move result to dest after restoration + ] + | Platform.MacOS -> + [ + // Save callee-saved registers + ARM64.STP (ARM64.X19, ARM64.X20, ARM64.SP, -16s) + ARM64.STP (ARM64.X21, ARM64.X22, ARM64.SP, -32s) + ARM64.STP (ARM64.X23, ARM64.X24, ARM64.SP, -48s) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 48us) + + // Allocate stack for path buffer (256) + caller-saved regs (64) = 320 bytes + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 255us) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 65us) + + // Save path and content pointers + ARM64.MOV_reg (ARM64.X19, pathReg) + ARM64.MOV_reg (ARM64.X22, contentReg) + + // Save ALL potentially live caller-saved registers (X1-X8) at SP+256 + ARM64.STR (ARM64.X1, ARM64.SP, 256s) + ARM64.STR (ARM64.X2, ARM64.SP, 264s) + ARM64.STR (ARM64.X3, ARM64.SP, 272s) + ARM64.STR (ARM64.X4, ARM64.SP, 280s) + ARM64.STR (ARM64.X5, ARM64.SP, 288s) + ARM64.STR (ARM64.X6, ARM64.SP, 296s) + ARM64.STR (ARM64.X7, ARM64.SP, 304s) + ARM64.STR (ARM64.X8, ARM64.SP, 312s) + + // Copy path to stack buffer using non-allocatable registers + // X10 = path length + ARM64.LDR (ARM64.X10, ARM64.X19, 0s) + // X9 = dest buffer (SP) + ARM64.MOV_reg (ARM64.X9, ARM64.SP) + // X11 = source data (X19 + 8) + ARM64.ADD_imm (ARM64.X11, ARM64.X19, 8us) + + // Copy loop (7 instructions, 0-6) + ARM64.CBZ_offset (ARM64.X10, 7) + ARM64.LDRB_imm (ARM64.X12, ARM64.X11, 0) + ARM64.STRB (ARM64.X12, ARM64.X9, 0) + ARM64.ADD_imm (ARM64.X9, ARM64.X9, 1us) + ARM64.ADD_imm (ARM64.X11, ARM64.X11, 1us) + ARM64.SUB_imm (ARM64.X10, ARM64.X10, 1us) + ARM64.B (-6) + + // Store null terminator + ARM64.MOVZ (ARM64.X12, 0us, 0) + ARM64.STRB (ARM64.X12, ARM64.X9, 0) + + // open(path, flags, mode) + ARM64.MOV_reg (ARM64.X0, ARM64.SP) + ARM64.MOVZ (ARM64.X1, flags, 0) + ARM64.MOVZ (ARM64.X2, 420us, 0) // mode 0644 + ARM64.MOVZ (ARM64.X16, syscalls.Numbers.Open, 0) + ARM64.SVC syscalls.SvcImmediate + + ARM64.MOV_reg (ARM64.X21, ARM64.X0) + ARM64.TBNZ (ARM64.X0, 63, 18) // If negative, branch to error path (17 instructions + 1) + + // write(fd, buf, count) + ARM64.MOV_reg (ARM64.X0, ARM64.X21) + ARM64.ADD_imm (ARM64.X1, ARM64.X22, 8us) + ARM64.LDR (ARM64.X2, ARM64.X22, 0s) + ARM64.MOVZ (ARM64.X16, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + + // close(fd) + ARM64.MOV_reg (ARM64.X0, ARM64.X21) + ARM64.MOVZ (ARM64.X16, syscalls.Numbers.Close, 0) + ARM64.SVC syscalls.SvcImmediate + + // Allocate Ok Result + ARM64.MOV_reg (ARM64.X23, ARM64.X28) + ARM64.ADD_imm (ARM64.X28, ARM64.X28, 24us) + ARM64.MOVZ (ARM64.X0, 0us, 0) + ARM64.STR (ARM64.X0, ARM64.X23, 0s) + ARM64.STR (ARM64.X0, ARM64.X23, 8s) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.STR (ARM64.X0, ARM64.X23, 16s) + ARM64.MOV_reg (ARM64.X20, ARM64.X23) + ARM64.B 30 // Jump to cleanup (skip 29 error path instructions + 1) + + // Error path + ARM64.MOV_reg (ARM64.X24, ARM64.X28) + ARM64.ADD_imm (ARM64.X28, ARM64.X28, 24us) + + ARM64.MOVZ (ARM64.X0, 5us, 0) + ARM64.STR (ARM64.X0, ARM64.X24, 0s) + + ARM64.MOVZ (ARM64.X0, 69us, 0) + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 8us) + ARM64.STRB_reg (ARM64.X0, ARM64.X1) + ARM64.MOVZ (ARM64.X0, 114us, 0) + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 9us) + ARM64.STRB_reg (ARM64.X0, ARM64.X1) + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 10us) + ARM64.STRB_reg (ARM64.X0, ARM64.X1) + ARM64.MOVZ (ARM64.X0, 111us, 0) + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 11us) + ARM64.STRB_reg (ARM64.X0, ARM64.X1) + ARM64.MOVZ (ARM64.X0, 114us, 0) + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 12us) + ARM64.STRB_reg (ARM64.X0, ARM64.X1) + + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.ADD_imm (ARM64.X1, ARM64.X24, 13us) + ARM64.STR (ARM64.X0, ARM64.X1, 0s) + + ARM64.MOV_reg (ARM64.X23, ARM64.X28) + ARM64.ADD_imm (ARM64.X28, ARM64.X28, 24us) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.STR (ARM64.X0, ARM64.X23, 0s) + ARM64.STR (ARM64.X24, ARM64.X23, 8s) + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.STR (ARM64.X0, ARM64.X23, 16s) + ARM64.MOV_reg (ARM64.X20, ARM64.X23) + + // Cleanup - save result to X0 before restoring callee-saved registers + ARM64.MOV_reg (ARM64.X0, ARM64.X20) + + // Restore ALL caller-saved registers (X1-X8) we saved at start + ARM64.LDR (ARM64.X1, ARM64.SP, 256s) + ARM64.LDR (ARM64.X2, ARM64.SP, 264s) + ARM64.LDR (ARM64.X3, ARM64.SP, 272s) + ARM64.LDR (ARM64.X4, ARM64.SP, 280s) + ARM64.LDR (ARM64.X5, ARM64.SP, 288s) + ARM64.LDR (ARM64.X6, ARM64.SP, 296s) + ARM64.LDR (ARM64.X7, ARM64.SP, 304s) + ARM64.LDR (ARM64.X8, ARM64.SP, 312s) + + // Deallocate 320-byte stack buffer + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 255us) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 65us) + ARM64.LDP (ARM64.X23, ARM64.X24, ARM64.SP, 0s) + ARM64.LDP (ARM64.X21, ARM64.X22, ARM64.SP, 16s) + ARM64.LDP (ARM64.X19, ARM64.X20, ARM64.SP, 32s) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 48us) + ARM64.MOV_reg (destReg, ARM64.X0) // Move result to dest after restoration + ] + +/// Generate ARM64 instructions to get 8 random bytes as Int64 +/// destReg: destination register for the random Int64 +/// Uses getrandom (Linux) or getentropy (macOS) syscall +/// Note: This function saves/restores caller-saved registers X1, X2, X8 +/// that may contain live values, since the syscall clobbers them. +let generateRandomInt64 (destReg: ARM64.Reg) : ARM64.Instr list = + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + + match os with + | Platform.MacOS -> + [ + // Save X1 (caller-saved, may contain live value) + // Allocate 32 bytes: 8 for X1, 8 for buffer, 16 for alignment + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 32us) + ARM64.STR (ARM64.X1, ARM64.SP, 24s) // Save X1 at SP+24 + + // Call getentropy(buffer, 8) + // X0 = buffer pointer (SP), X1 = length (8) + ARM64.MOV_reg (ARM64.X0, ARM64.SP) + ARM64.MOVZ (ARM64.X1, 8us, 0) + ARM64.MOVZ (ARM64.X16, syscalls.Numbers.Getrandom, 0) + ARM64.SVC syscalls.SvcImmediate + + // Load 8 bytes from buffer into X0 + ARM64.LDR (ARM64.X0, ARM64.SP, 0s) + + // Restore X1 + ARM64.LDR (ARM64.X1, ARM64.SP, 24s) + + // Cleanup stack + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 32us) + + // Move result to destination + ARM64.MOV_reg (destReg, ARM64.X0) + ] + | Platform.Linux -> + [ + // Save X1, X2, X8 (caller-saved, may contain live values) + // Allocate 48 bytes: 8 for buffer, 8 each for X1/X2/X8 = 32, 16 for alignment + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 48us) + ARM64.STR (ARM64.X1, ARM64.SP, 40s) // Save X1 at SP+40 + ARM64.STR (ARM64.X2, ARM64.SP, 32s) // Save X2 at SP+32 + ARM64.STR (ARM64.X8, ARM64.SP, 24s) // Save X8 at SP+24 + + // Call getrandom(buffer, 8, flags=0) + // X0 = buffer pointer (SP), X1 = length (8), X2 = flags (0) + ARM64.MOV_reg (ARM64.X0, ARM64.SP) + ARM64.MOVZ (ARM64.X1, 8us, 0) + ARM64.MOVZ (ARM64.X2, 0us, 0) + ARM64.MOVZ (ARM64.X8, syscalls.Numbers.Getrandom, 0) + ARM64.SVC syscalls.SvcImmediate + + // Load 8 bytes from buffer into X0 + ARM64.LDR (ARM64.X0, ARM64.SP, 0s) + + // Restore X1, X2, X8 + ARM64.LDR (ARM64.X1, ARM64.SP, 40s) + ARM64.LDR (ARM64.X2, ARM64.SP, 32s) + ARM64.LDR (ARM64.X8, ARM64.SP, 24s) + + // Cleanup stack + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 48us) + + // Move result to destination + ARM64.MOV_reg (destReg, ARM64.X0) + ] + +/// Generate ARM64 instructions to get current Unix epoch seconds as Int64 +/// destReg: destination register for the timestamp +/// Uses gettimeofday (macOS) or clock_gettime (Linux) syscall +/// Note: This function saves/restores caller-saved registers that may contain live values. +let generateDateNow (destReg: ARM64.Reg) : ARM64.Instr list = + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + + match os with + | Platform.MacOS -> + [ + // Save X1 (caller-saved, may contain live value) + // Allocate 32 bytes: 8 for X1, 16 for timeval struct (tv_sec, tv_usec), 8 for alignment + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 32us) + ARM64.STR (ARM64.X1, ARM64.SP, 24s) // Save X1 at SP+24 + + // Call gettimeofday(tv, NULL) + // X0 = timeval pointer (SP), X1 = timezone (NULL) + ARM64.MOV_reg (ARM64.X0, ARM64.SP) + ARM64.MOVZ (ARM64.X1, 0us, 0) // NULL timezone + ARM64.MOVZ (ARM64.X16, syscalls.Numbers.Gettimeofday, 0) + ARM64.SVC syscalls.SvcImmediate + + // Load tv_sec (first 8 bytes of timeval) into X0 + ARM64.LDR (ARM64.X0, ARM64.SP, 0s) + + // Restore X1 + ARM64.LDR (ARM64.X1, ARM64.SP, 24s) + + // Cleanup stack + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 32us) + + // Move result to destination + ARM64.MOV_reg (destReg, ARM64.X0) + ] + | Platform.Linux -> + [ + // Save X1, X2, X8 (caller-saved, may contain live values) + // Allocate 48 bytes: 16 for timespec struct (tv_sec, tv_nsec), 8 each for X1/X2/X8 = 24, 8 for alignment + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 48us) + ARM64.STR (ARM64.X1, ARM64.SP, 40s) // Save X1 at SP+40 + ARM64.STR (ARM64.X2, ARM64.SP, 32s) // Save X2 at SP+32 + ARM64.STR (ARM64.X8, ARM64.SP, 24s) // Save X8 at SP+24 + + // Call clock_gettime(CLOCK_REALTIME, ts) + // X0 = clock_id (0 = CLOCK_REALTIME), X1 = timespec pointer (SP) + ARM64.MOVZ (ARM64.X0, 0us, 0) // CLOCK_REALTIME = 0 + ARM64.MOV_reg (ARM64.X1, ARM64.SP) + ARM64.MOVZ (ARM64.X8, syscalls.Numbers.Gettimeofday, 0) + ARM64.SVC syscalls.SvcImmediate + + // Load tv_sec (first 8 bytes of timespec) into X0 + ARM64.LDR (ARM64.X0, ARM64.SP, 0s) + + // Restore X1, X2, X8 + ARM64.LDR (ARM64.X1, ARM64.SP, 40s) + ARM64.LDR (ARM64.X2, ARM64.SP, 32s) + ARM64.LDR (ARM64.X8, ARM64.SP, 24s) + + // Cleanup stack + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 48us) + + // Move result to destination + ARM64.MOV_reg (destReg, ARM64.X0) + ] + +/// Generate code for FileWriteFromPtr: write raw bytes to a file +/// pathReg: register containing heap string pointer to file path +/// ptrReg: register containing raw pointer to bytes +/// lengthReg: register containing length in bytes +/// destReg: destination register (result = 1 on success, 0 on failure) +let generateFileWriteFromPtr (destReg: ARM64.Reg) (pathReg: ARM64.Reg) (ptrReg: ARM64.Reg) (lengthReg: ARM64.Reg) : ARM64.Instr list = + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + + // O_WRONLY | O_CREAT | O_TRUNC + let writeFlags = + match os with + | Platform.Linux -> 577us // 1|64|512 + | Platform.MacOS -> 1537us // 1|0x200|0x400 + + match os with + | Platform.Linux -> + [ + // Save callee-saved registers + ARM64.STP (ARM64.X19, ARM64.X20, ARM64.SP, -16s) + ARM64.STP (ARM64.X21, ARM64.X22, ARM64.SP, -32s) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 32us) + + // Allocate stack for path buffer (256 bytes) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 255us) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 1us) + + // Save registers + ARM64.MOV_reg (ARM64.X19, pathReg) // X19 = path heap string + ARM64.MOV_reg (ARM64.X20, ptrReg) // X20 = data pointer + ARM64.MOV_reg (ARM64.X21, lengthReg) // X21 = length + + // Copy path to stack buffer with null terminator + ARM64.LDR (ARM64.X2, ARM64.X19, 0s) // X2 = path length + ARM64.MOV_reg (ARM64.X0, ARM64.SP) // X0 = dest buffer + ARM64.ADD_imm (ARM64.X1, ARM64.X19, 8us) // X1 = source data + ARM64.MOVZ (ARM64.X4, 0us, 0) // X4 = index + + // Copy loop + ARM64.CBZ_offset (ARM64.X2, 7) + ARM64.LDRB (ARM64.X3, ARM64.X1, ARM64.X4) + ARM64.STRB (ARM64.X3, ARM64.X0, 0) + ARM64.ADD_imm (ARM64.X0, ARM64.X0, 1us) + ARM64.ADD_imm (ARM64.X1, ARM64.X1, 1us) + ARM64.SUB_imm (ARM64.X2, ARM64.X2, 1us) + ARM64.B (-6) + + // Store null terminator + ARM64.MOVZ (ARM64.X3, 0us, 0) + ARM64.STRB (ARM64.X3, ARM64.X0, 0) + + // openat(AT_FDCWD, path, flags, mode) + ARM64.MOVZ (ARM64.X0, 100us, 0) + ARM64.NEG (ARM64.X0, ARM64.X0) // AT_FDCWD = -100 + ARM64.MOV_reg (ARM64.X1, ARM64.SP) // path + ARM64.MOVZ (ARM64.X2, writeFlags, 0) // flags + ARM64.MOVZ (ARM64.X3, 420us, 0) // mode 0644 + ARM64.MOVZ (ARM64.X8, syscalls.Numbers.Open, 0) + ARM64.SVC syscalls.SvcImmediate + + // Check if open failed + ARM64.MOV_reg (ARM64.X22, ARM64.X0) // X22 = fd + ARM64.TBNZ (ARM64.X0, 63, 11) // If negative, branch to error path + + // write(fd, buf, count) + ARM64.MOV_reg (ARM64.X0, ARM64.X22) // fd + ARM64.MOV_reg (ARM64.X1, ARM64.X20) // buf = data pointer + ARM64.MOV_reg (ARM64.X2, ARM64.X21) // count = length + ARM64.MOVZ (ARM64.X8, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + + // close(fd) + ARM64.MOV_reg (ARM64.X0, ARM64.X22) + ARM64.MOVZ (ARM64.X8, syscalls.Numbers.Close, 0) + ARM64.SVC syscalls.SvcImmediate + + // Success: result = 1 + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.B 2 // Skip error path + + // Error path: result = 0 + ARM64.MOVZ (ARM64.X0, 0us, 0) + + // Cleanup + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 255us) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 1us) + ARM64.LDP (ARM64.X21, ARM64.X22, ARM64.SP, 0s) + ARM64.LDP (ARM64.X19, ARM64.X20, ARM64.SP, 16s) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 32us) + ARM64.MOV_reg (destReg, ARM64.X0) + ] + + | Platform.MacOS -> + [ + // Save callee-saved registers + ARM64.STP (ARM64.X19, ARM64.X20, ARM64.SP, -16s) + ARM64.STP (ARM64.X21, ARM64.X22, ARM64.SP, -32s) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 32us) + + // Allocate stack for path buffer (256 bytes) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 255us) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 1us) + + // Save registers + ARM64.MOV_reg (ARM64.X19, pathReg) // X19 = path heap string + ARM64.MOV_reg (ARM64.X20, ptrReg) // X20 = data pointer + ARM64.MOV_reg (ARM64.X21, lengthReg) // X21 = length + + // Copy path to stack buffer with null terminator + ARM64.LDR (ARM64.X2, ARM64.X19, 0s) // X2 = path length + ARM64.MOV_reg (ARM64.X0, ARM64.SP) // X0 = dest buffer + ARM64.ADD_imm (ARM64.X1, ARM64.X19, 8us) // X1 = source data + ARM64.MOVZ (ARM64.X4, 0us, 0) // X4 = index + + // Copy loop + ARM64.CBZ_offset (ARM64.X2, 7) + ARM64.LDRB (ARM64.X3, ARM64.X1, ARM64.X4) + ARM64.STRB (ARM64.X3, ARM64.X0, 0) + ARM64.ADD_imm (ARM64.X0, ARM64.X0, 1us) + ARM64.ADD_imm (ARM64.X1, ARM64.X1, 1us) + ARM64.SUB_imm (ARM64.X2, ARM64.X2, 1us) + ARM64.B (-6) + + // Store null terminator + ARM64.MOVZ (ARM64.X3, 0us, 0) + ARM64.STRB (ARM64.X3, ARM64.X0, 0) + + // open(path, flags, mode) - macOS uses open, not openat + ARM64.MOV_reg (ARM64.X0, ARM64.SP) // path + ARM64.MOVZ (ARM64.X1, writeFlags, 0) // flags + ARM64.MOVZ (ARM64.X2, 420us, 0) // mode 0644 + ARM64.MOVZ (ARM64.X16, syscalls.Numbers.Open, 0) + ARM64.SVC syscalls.SvcImmediate + + // Check if open failed + ARM64.MOV_reg (ARM64.X22, ARM64.X0) // X22 = fd + ARM64.TBNZ (ARM64.X0, 63, 10) // If negative, branch to error path + + // write(fd, buf, count) + ARM64.MOV_reg (ARM64.X0, ARM64.X22) // fd + ARM64.MOV_reg (ARM64.X1, ARM64.X20) // buf = data pointer + ARM64.MOV_reg (ARM64.X2, ARM64.X21) // count = length + ARM64.MOVZ (ARM64.X16, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + + // close(fd) + ARM64.MOV_reg (ARM64.X0, ARM64.X22) + ARM64.MOVZ (ARM64.X16, syscalls.Numbers.Close, 0) + ARM64.SVC syscalls.SvcImmediate + + // Success: result = 1 + ARM64.MOVZ (ARM64.X0, 1us, 0) + ARM64.B 2 // Skip error path + + // Error path: result = 0 + ARM64.MOVZ (ARM64.X0, 0us, 0) + + // Cleanup + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 255us) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 1us) + ARM64.LDP (ARM64.X21, ARM64.X22, ARM64.SP, 0s) + ARM64.LDP (ARM64.X19, ARM64.X20, ARM64.SP, 16s) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 32us) + ARM64.MOV_reg (destReg, ARM64.X0) + ] + +/// Generate ARM64 instructions to flush coverage data to file +/// Writes coverage counters to /tmp/dark_cov.bin before program exit +/// coverageExprCount: number of expressions (determines bytes to write = count * 8) +/// +/// Uses ADRP+ADD to get _coverage_data address from BSS section +/// Opens file, writes data, closes file (errors are silently ignored) +let generateCoverageFlush (coverageExprCount: int) : ARM64.Instr list = + if coverageExprCount = 0 then + [] + else + let os = + match Platform.detectOS () with + | Ok platform -> platform + | Error err -> Crash.crash $"Runtime: Platform detection failed: {err}" + let syscalls = ARM64.syscallConfigFor os + + // O_WRONLY | O_CREAT | O_TRUNC + let writeFlags = + match os with + | Platform.Linux -> 577us // 1|64|512 + | Platform.MacOS -> 1537us // 1|0x200|0x400 + + // Path: "/tmp/dark_cov.bin" = 18 bytes + null = 19 bytes, round to 24 for alignment + let byteCount = coverageExprCount * 8 + + match os with + | Platform.Linux -> + [ + // Allocate stack for path (24 bytes, 8-byte aligned) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 24us) + + // Write "/tmp/dark_cov.bin\0" to stack + // First 8 bytes: "/tmp/dar" = 0x7261642F706D742F + ARM64.MOVZ (ARM64.X9, 0x2F74us, 0) // "/t" + ARM64.MOVK (ARM64.X9, 0x6D70us, 16) // "mp" + ARM64.MOVK (ARM64.X9, 0x642Fus, 32) // "/d" + ARM64.MOVK (ARM64.X9, 0x7261us, 48) // "ar" + ARM64.STR (ARM64.X9, ARM64.SP, 0s) + + // Next 8 bytes: "k_cov.bi" = 0x69622E766F635F6B + ARM64.MOVZ (ARM64.X9, 0x5F6Bus, 0) // "k_" + ARM64.MOVK (ARM64.X9, 0x6F63us, 16) // "co" + ARM64.MOVK (ARM64.X9, 0x2E76us, 32) // "v." + ARM64.MOVK (ARM64.X9, 0x6962us, 48) // "bi" + ARM64.STR (ARM64.X9, ARM64.SP, 8s) + + // Last 4 bytes: "n\0\0\0" = 0x0000006E + ARM64.MOVZ (ARM64.X9, 0x006Eus, 0) // "n\0" + ARM64.STR (ARM64.X9, ARM64.SP, 16s) + + // Get coverage data address via ADRP+ADD + ARM64.ADRP (ARM64.X10, "_coverage_data") + ARM64.ADD_label (ARM64.X10, ARM64.X10, "_coverage_data") + + // openat(AT_FDCWD, path, flags, mode) + ARM64.MOVZ (ARM64.X0, 100us, 0) + ARM64.NEG (ARM64.X0, ARM64.X0) // AT_FDCWD = -100 + ARM64.MOV_reg (ARM64.X1, ARM64.SP) // path + ARM64.MOVZ (ARM64.X2, writeFlags, 0) // flags + ARM64.MOVZ (ARM64.X3, 420us, 0) // mode 0644 + ARM64.MOVZ (ARM64.X8, syscalls.Numbers.Open, 0) + ARM64.SVC syscalls.SvcImmediate + + // Check if open failed (X0 < 0) + ARM64.TBNZ (ARM64.X0, 63, 6) // If negative, skip to cleanup + + // Save fd + ARM64.MOV_reg (ARM64.X11, ARM64.X0) + + // write(fd, buf, count) + ARM64.MOV_reg (ARM64.X0, ARM64.X11) // fd + ARM64.MOV_reg (ARM64.X1, ARM64.X10) // buf = _coverage_data + ] @ + (if byteCount < 65536 then + [ARM64.MOVZ (ARM64.X2, uint16 byteCount, 0)] + else + // Large count - load in two parts + [ARM64.MOVZ (ARM64.X2, uint16 (byteCount &&& 0xFFFF), 0) + ARM64.MOVK (ARM64.X2, uint16 ((byteCount >>> 16) &&& 0xFFFF), 16)]) @ + [ + ARM64.MOVZ (ARM64.X8, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + + // close(fd) + ARM64.MOV_reg (ARM64.X0, ARM64.X11) + ARM64.MOVZ (ARM64.X8, syscalls.Numbers.Close, 0) + ARM64.SVC syscalls.SvcImmediate + + // Cleanup stack + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 24us) + ] + + | Platform.MacOS -> + [ + // Allocate stack for path (24 bytes, 8-byte aligned) + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 24us) + + // Write "/tmp/dark_cov.bin\0" to stack (same as Linux) + ARM64.MOVZ (ARM64.X9, 0x2F74us, 0) + ARM64.MOVK (ARM64.X9, 0x6D70us, 16) + ARM64.MOVK (ARM64.X9, 0x642Fus, 32) + ARM64.MOVK (ARM64.X9, 0x7261us, 48) + ARM64.STR (ARM64.X9, ARM64.SP, 0s) + + ARM64.MOVZ (ARM64.X9, 0x5F6Bus, 0) + ARM64.MOVK (ARM64.X9, 0x6F63us, 16) + ARM64.MOVK (ARM64.X9, 0x2E76us, 32) + ARM64.MOVK (ARM64.X9, 0x6962us, 48) + ARM64.STR (ARM64.X9, ARM64.SP, 8s) + + ARM64.MOVZ (ARM64.X9, 0x006Eus, 0) + ARM64.STR (ARM64.X9, ARM64.SP, 16s) + + // Get coverage data address via ADRP+ADD + ARM64.ADRP (ARM64.X10, "_coverage_data") + ARM64.ADD_label (ARM64.X10, ARM64.X10, "_coverage_data") + + // open(path, flags, mode) - macOS uses direct open syscall + ARM64.MOV_reg (ARM64.X0, ARM64.SP) // path + ARM64.MOVZ (ARM64.X1, writeFlags, 0) // flags + ARM64.MOVZ (ARM64.X2, 420us, 0) // mode 0644 + ARM64.MOVZ (ARM64.X16, syscalls.Numbers.Open, 0) + ARM64.SVC syscalls.SvcImmediate + + // Check if open failed (X0 < 0) + ARM64.TBNZ (ARM64.X0, 63, 6) // If negative, skip to cleanup + + // Save fd + ARM64.MOV_reg (ARM64.X11, ARM64.X0) + + // write(fd, buf, count) + ARM64.MOV_reg (ARM64.X0, ARM64.X11) // fd + ARM64.MOV_reg (ARM64.X1, ARM64.X10) // buf = _coverage_data + ] @ + (if byteCount < 65536 then + [ARM64.MOVZ (ARM64.X2, uint16 byteCount, 0)] + else + [ARM64.MOVZ (ARM64.X2, uint16 (byteCount &&& 0xFFFF), 0) + ARM64.MOVK (ARM64.X2, uint16 ((byteCount >>> 16) &&& 0xFFFF), 16)]) @ + [ + ARM64.MOVZ (ARM64.X16, syscalls.Numbers.Write, 0) + ARM64.SVC syscalls.SvcImmediate + + // close(fd) + ARM64.MOV_reg (ARM64.X0, ARM64.X11) + ARM64.MOVZ (ARM64.X16, syscalls.Numbers.Close, 0) + ARM64.SVC syscalls.SvcImmediate + + // Cleanup stack + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 24us) + ] + +/// Generate ARM64 instructions to convert a float to a heap string +/// destReg: destination register for the heap string pointer +/// valueReg: FP register containing the float value +/// The string format is "-123.45" (integer part + "." + 1-2 decimal digits) +/// Heap string layout: [8 bytes length][N bytes data][8 bytes refcount] +let generateFloatToString (destReg: ARM64.Reg) (valueReg: ARM64.FReg) : ARM64.Instr list = + // This function: + // 1. Converts float to characters in a buffer on stack + // 2. Allocates heap string using bump allocator (X28) + // 3. Copies characters to heap and sets length + // 4. Returns heap pointer in destReg + // + // Uses: X0-X7 (scratch), D0-D1 (float), X19 (heap ptr), X20 (sign flag), X21 (saved length) + // Stack layout (64 bytes): + // [SP+0..31]: character buffer (32 bytes) + // [SP+32..39]: saved D0 + // [SP+40..47]: saved X19 + // [SP+48..55]: saved X20 + // [SP+56..63]: saved X21 + [ + // Save callee-saved registers and allocate stack + ARM64.SUB_imm (ARM64.SP, ARM64.SP, 64us) + ARM64.STR (ARM64.X19, ARM64.SP, 40s) + ARM64.STR (ARM64.X20, ARM64.SP, 48s) + ARM64.STR (ARM64.X21, ARM64.SP, 56s) + + // Move input to D0 + ARM64.FMOV_reg (ARM64.D0, valueReg) + ARM64.STR_fp (ARM64.D0, ARM64.SP, 32s) // Save original value + + // Check if negative using sign bit + ARM64.MOVZ (ARM64.X20, 0us, 0) // X20 = 0 (assume positive) + ARM64.FMOV_to_gp (ARM64.X0, ARM64.D0) // Get bit pattern + ARM64.TBNZ (ARM64.X0, 63, 2) // If sign bit set, X20 = 1 + ARM64.B (2) // Skip setting X20 + ARM64.MOVZ (ARM64.X20, 1us, 0) // X20 = 1 (negative) + + // X1 = buffer pointer (start at end of buffer, work backwards) + ARM64.ADD_imm (ARM64.X1, ARM64.SP, 31us) // X1 = SP + 31 (end of buffer) + + // Extract integer part + ARM64.FCVTZS (ARM64.X0, ARM64.D0) // X0 = integer part (signed) + // Make X2 = absolute value of X0 + ARM64.TBNZ (ARM64.X0, 63, 3) // If negative, skip to NEG + ARM64.MOV_reg (ARM64.X2, ARM64.X0) // X2 = X0 (positive) + ARM64.B (2) // Skip NEG + ARM64.NEG (ARM64.X2, ARM64.X0) // X2 = -X0 (make positive) + + // === Build fractional part first (1-2 digits) === + ARM64.LDR_fp (ARM64.D0, ARM64.SP, 32s) + ARM64.FCVTZS (ARM64.X0, ARM64.D0) + ARM64.SCVTF (ARM64.D1, ARM64.X0) + ARM64.FSUB (ARM64.D0, ARM64.D0, ARM64.D1) // D0 = fractional part + + // Multiply by 100 to get 2 digits + ARM64.MOVZ (ARM64.X0, 100us, 0) + ARM64.SCVTF (ARM64.D1, ARM64.X0) + ARM64.FMUL (ARM64.D0, ARM64.D0, ARM64.D1) + ARM64.FCVTZS (ARM64.X7, ARM64.D0) // X7 = fractional digits (may be negative) + + // Take absolute value of X7 + ARM64.TBNZ (ARM64.X7, 63, 2) + ARM64.B (2) + ARM64.NEG (ARM64.X7, ARM64.X7) + + // Extract both fractional digits + ARM64.MOVZ (ARM64.X3, 10us, 0) + ARM64.UDIV (ARM64.X4, ARM64.X7, ARM64.X3) // X4 = tens digit + ARM64.MSUB (ARM64.X5, ARM64.X4, ARM64.X3, ARM64.X7) // X5 = ones digit + + // Store fractional digits (backwards): ones first, then tens + ARM64.ADD_imm (ARM64.X5, ARM64.X5, 48us) // ASCII + ARM64.MOV_reg (ARM64.X7, ARM64.X5) // Keep ones digit for length trim + ARM64.STRB (ARM64.X5, ARM64.X1, 0) + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) + ARM64.ADD_imm (ARM64.X4, ARM64.X4, 48us) // ASCII + ARM64.STRB (ARM64.X4, ARM64.X1, 0) + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) + + // Store decimal point + ARM64.MOVZ (ARM64.X3, 46us, 0) // '.' + ARM64.STRB (ARM64.X3, ARM64.X1, 0) + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) + + // === Build integer part === + // X2 still has absolute value of integer part + ARM64.CBZ_offset (ARM64.X2, 11) // If zero, print just "0" + + // Convert integer digits (loop) + ARM64.MOVZ (ARM64.X3, 10us, 0) + ARM64.UDIV (ARM64.X4, ARM64.X2, ARM64.X3) + ARM64.MSUB (ARM64.X5, ARM64.X4, ARM64.X3, ARM64.X2) + ARM64.ADD_imm (ARM64.X5, ARM64.X5, 48us) + ARM64.STRB (ARM64.X5, ARM64.X1, 0) + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) + ARM64.MOV_reg (ARM64.X2, ARM64.X4) + ARM64.CBZ_offset (ARM64.X2, 2) + ARM64.B (-8) + ARM64.B (4) // Skip zero case + + // Zero case: just store '0' + ARM64.MOVZ (ARM64.X3, 48us, 0) // '0' + ARM64.STRB (ARM64.X3, ARM64.X1, 0) + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) + + // Add minus sign if negative + ARM64.CBZ_offset (ARM64.X20, 4) + ARM64.MOVZ (ARM64.X3, 45us, 0) // '-' + ARM64.STRB (ARM64.X3, ARM64.X1, 0) + ARM64.SUB_imm (ARM64.X1, ARM64.X1, 1us) + + // X1 now points one before first char + // Adjust X1 to point to first char, calculate length (trim trailing zero) + ARM64.ADD_imm (ARM64.X1, ARM64.X1, 1us) // X1 = start of string + ARM64.ADD_imm (ARM64.X3, ARM64.SP, 32us) // X3 = end+1 of buffer (SP+32) + ARM64.SUBS_imm (ARM64.X7, ARM64.X7, 48us) // Set flags if ones digit was '0' + ARM64.CSET (ARM64.X4, ARM64.EQ) // X4 = 1 when ones digit == 0 + ARM64.SUB_reg (ARM64.X3, ARM64.X3, ARM64.X4) // Drop ones digit if needed + ARM64.SUB_reg (ARM64.X21, ARM64.X3, ARM64.X1) // X21 = length (save for later) + + // Allocate heap string using bump allocator (X28) + // Total size = 8 (length) + string length + 8 (refcount), aligned to 8 + ARM64.ADD_imm (ARM64.X0, ARM64.X21, 23us) // X0 = len + 16 + 7 (for alignment) + ARM64.AND_imm (ARM64.X0, ARM64.X0, 0xFFFFFFFFFFFFFFF8UL) // Round down to 8-byte alignment + ARM64.MOV_reg (ARM64.X19, ARM64.X28) // X19 = current heap pointer (our allocation) + ARM64.ADD_reg (ARM64.X28, ARM64.X28, ARM64.X0) // Bump allocator + + // Store length at [X19] + ARM64.STR (ARM64.X21, ARM64.X19, 0s) + + // Initialize refcount to 1 at [X19 + 8 + length] + ARM64.ADD_reg (ARM64.X3, ARM64.X19, ARM64.X21) // X3 = X19 + length + ARM64.MOVZ (ARM64.X4, 1us, 0) // X4 = 1 + ARM64.STR (ARM64.X4, ARM64.X3, 8s) // Store refcount at [X19 + 8 + length] + + // Copy string from stack buffer to heap + // X1 = source (stack buffer start), X19+8 = dest, X21 = length + ARM64.ADD_imm (ARM64.X3, ARM64.X19, 8us) // X3 = dest + ARM64.MOV_reg (ARM64.X2, ARM64.X21) // X2 = length (counter) + + // Copy loop (byte by byte) + ARM64.CBZ_offset (ARM64.X2, 6) // If length 0, skip + ARM64.LDRB_imm (ARM64.X4, ARM64.X1, 0) + ARM64.STRB (ARM64.X4, ARM64.X3, 0) + ARM64.ADD_imm (ARM64.X1, ARM64.X1, 1us) + ARM64.ADD_imm (ARM64.X3, ARM64.X3, 1us) + ARM64.SUB_imm (ARM64.X2, ARM64.X2, 1us) + ARM64.CBNZ_offset (ARM64.X2, -5) + + // Move result to dest register + ARM64.MOV_reg (destReg, ARM64.X19) + + // Restore callee-saved registers + ARM64.LDR (ARM64.X19, ARM64.SP, 40s) + ARM64.LDR (ARM64.X20, ARM64.SP, 48s) + ARM64.LDR (ARM64.X21, ARM64.SP, 56s) + ARM64.ADD_imm (ARM64.SP, ARM64.SP, 64us) + ] diff --git a/backend/src/LibCompiler/Stdlib.fs b/backend/src/LibCompiler/Stdlib.fs new file mode 100644 index 0000000000..b41a0d9136 --- /dev/null +++ b/backend/src/LibCompiler/Stdlib.fs @@ -0,0 +1,230 @@ +// Stdlib.fs - Standard Library Module Definitions +// +// Defines intrinsic Stdlib module signatures used directly by the compiler. +// Non-intrinsic stdlib functions are loaded from stdlib/*.dark. + +module Stdlib + +open AST + +/// Intrinsic Stdlib.Int64 functions +let int64IntrinsicModule : ModuleDef = { + Name = "Stdlib.Int64" + Functions = [ + // toFloat : (Int64) -> Float + { Name = "toFloat"; TypeParams = []; ParamTypes = [TInt64]; ReturnType = TFloat64 } + ] +} + +/// Intrinsic Stdlib.Float functions +let floatIntrinsicModule : ModuleDef = { + Name = "Stdlib.Float" + Functions = [ + // sqrt : (Float) -> Float + { Name = "sqrt"; TypeParams = []; ParamTypes = [TFloat64]; ReturnType = TFloat64 } + // abs : (Float) -> Float + { Name = "abs"; TypeParams = []; ParamTypes = [TFloat64]; ReturnType = TFloat64 } + // negate : (Float) -> Float + { Name = "negate"; TypeParams = []; ParamTypes = [TFloat64]; ReturnType = TFloat64 } + // toInt : (Float) -> Int64 + { Name = "toInt"; TypeParams = []; ParamTypes = [TFloat64]; ReturnType = TInt64 } + // toBits : (Float) -> UInt64 + { Name = "toBits"; TypeParams = []; ParamTypes = [TFloat64]; ReturnType = TUInt64 } + ] +} + +/// Helper to create Result type +let resultType (okType: Type) : Type = + TSum ("Stdlib.Result.Result", [okType; TString]) + +/// Stdlib.File module - file I/O operations (intrinsics) +/// These are special-cased in the compiler and generate syscalls +let fileModule : ModuleDef = { + Name = "Stdlib.File" + Functions = [ + // readText : (String) -> Result + { Name = "readText"; TypeParams = []; ParamTypes = [TString]; ReturnType = resultType TString } + // exists : (String) -> Bool + { Name = "exists"; TypeParams = []; ParamTypes = [TString]; ReturnType = TBool } + // writeText : (String, String) -> Result + { Name = "writeText"; TypeParams = []; ParamTypes = [TString; TString]; ReturnType = resultType TUnit } + // appendText : (String, String) -> Result + { Name = "appendText"; TypeParams = []; ParamTypes = [TString; TString]; ReturnType = resultType TUnit } + // delete : (String) -> Result + { Name = "delete"; TypeParams = []; ParamTypes = [TString]; ReturnType = resultType TUnit } + // setExecutable : (String) -> Result + { Name = "setExecutable"; TypeParams = []; ParamTypes = [TString]; ReturnType = resultType TUnit } + // writeFromPtr : (String, RawPtr, Int64) -> Bool - write raw bytes to file + { Name = "writeFromPtr"; TypeParams = []; ParamTypes = [TString; TRawPtr; TInt64]; ReturnType = TBool } + ] +} + +/// Stdlib.Path module - path operations +/// combine is defined in stdlib/Path.dark, tempDir is constant-folded at compile time +let pathModule : ModuleDef = { + Name = "Stdlib.Path" + Functions = [ + // tempDir : () -> String - returns system temp directory + { Name = "tempDir"; TypeParams = []; ParamTypes = []; ReturnType = TString } + // combine is defined in stdlib/Path.dark + ] +} + +/// Stdlib.Platform module - platform detection +/// These are constant-folded at compile time based on target platform +let platformModule : ModuleDef = { + Name = "Stdlib.Platform" + Functions = [ + // isMacOS : () -> Bool + { Name = "isMacOS"; TypeParams = []; ParamTypes = []; ReturnType = TBool } + // isLinux : () -> Bool + { Name = "isLinux"; TypeParams = []; ParamTypes = []; ReturnType = TBool } + ] +} + +/// Stdlib.Random module - random number generation (intrinsics) +/// These are special-cased in the compiler and generate syscalls +let randomModule : ModuleDef = { + Name = "Stdlib.Random" + Functions = [ + // int64 : () -> Int64 - returns 8 random bytes as Int64 + { Name = "int64"; TypeParams = []; ParamTypes = []; ReturnType = TInt64 } + ] +} + +/// Stdlib.Date module - date/time operations (intrinsics) +/// now() is special-cased in the compiler to generate syscalls +/// Other Date functions are defined in Date.dark as pure Dark code +let dateModule : ModuleDef = { + Name = "Stdlib.Date" + Functions = [ + // now : () -> Int64 - returns current Unix epoch seconds + { Name = "now"; TypeParams = []; ParamTypes = []; ReturnType = TInt64 } + ] +} + +/// Raw memory intrinsics - internal only for HAMT implementation +/// These functions bypass the type system and should only be used in stdlib code +/// The names start with __ to indicate they are internal +let rawMemoryIntrinsics : ModuleFunc list = [ + // __raw_alloc : (Int64) -> RawPtr - allocate raw bytes + { Name = "__raw_alloc"; TypeParams = []; ParamTypes = [TInt64]; ReturnType = TRawPtr } + // __raw_free : (RawPtr) -> Unit - free raw memory + { Name = "__raw_free"; TypeParams = []; ParamTypes = [TRawPtr]; ReturnType = TUnit } + // __raw_get : (RawPtr, Int64) -> v - read 8 bytes at offset, typed as v + { Name = "__raw_get"; TypeParams = ["v"]; ParamTypes = [TRawPtr; TInt64]; ReturnType = TVar "v" } + // __raw_set : (RawPtr, Int64, v) -> Unit - write 8 bytes at offset + { Name = "__raw_set"; TypeParams = ["v"]; ParamTypes = [TRawPtr; TInt64; TVar "v"]; ReturnType = TUnit } + // __raw_get_byte : (RawPtr, Int64) -> Int64 - read 1 byte at offset, zero-extended + { Name = "__raw_get_byte"; TypeParams = []; ParamTypes = [TRawPtr; TInt64]; ReturnType = TInt64 } + // __raw_set_byte : (RawPtr, Int64, Int64) -> Unit - write 1 byte at offset + { Name = "__raw_set_byte"; TypeParams = []; ParamTypes = [TRawPtr; TInt64; TInt64]; ReturnType = TUnit } + // __rawptr_to_int64 : (RawPtr) -> Int64 - cast pointer to int (for tagging) + { Name = "__rawptr_to_int64"; TypeParams = []; ParamTypes = [TRawPtr]; ReturnType = TInt64 } + // __int64_to_rawptr : (Int64) -> RawPtr - cast int to pointer (for memory ops) + { Name = "__int64_to_rawptr"; TypeParams = []; ParamTypes = [TInt64]; ReturnType = TRawPtr } + // __refcount_inc_string : (String) -> Unit - increment string refcount + { Name = "__refcount_inc_string"; TypeParams = []; ParamTypes = [TString]; ReturnType = TUnit } + // __refcount_dec_string : (String) -> Unit - decrement string refcount, free if 0 + { Name = "__refcount_dec_string"; TypeParams = []; ParamTypes = [TString]; ReturnType = TUnit } + // __string_to_int64 : (String) -> Int64 - cast string pointer to int (for storage) + { Name = "__string_to_int64"; TypeParams = []; ParamTypes = [TString]; ReturnType = TInt64 } + // __int64_to_string : (Int64) -> String - cast int to string pointer (for retrieval) + { Name = "__int64_to_string"; TypeParams = []; ParamTypes = [TInt64]; ReturnType = TString } + + // Bytes intrinsics - for byte array operations + // __bytes_to_int64 : (Bytes) -> Int64 - cast bytes pointer to int (for storage) + { Name = "__bytes_to_int64"; TypeParams = []; ParamTypes = [TBytes]; ReturnType = TInt64 } + // __int64_to_bytes : (Int64) -> Bytes - cast int to bytes pointer (for retrieval) + { Name = "__int64_to_bytes"; TypeParams = []; ParamTypes = [TInt64]; ReturnType = TBytes } + + // Dict intrinsics - for type-safe Dict operations + // __empty_dict : () -> Dict - create empty dict (null pointer) + { Name = "__empty_dict"; TypeParams = ["k"; "v"]; ParamTypes = []; ReturnType = TDict(TVar "k", TVar "v") } + // __dict_is_null : (Dict) -> Bool - check if dict is empty/null + { Name = "__dict_is_null"; TypeParams = ["k"; "v"]; ParamTypes = [TDict(TVar "k", TVar "v")]; ReturnType = TBool } + // __dict_get_tag : (Dict) -> Int64 - get tag bits from dict pointer + { Name = "__dict_get_tag"; TypeParams = ["k"; "v"]; ParamTypes = [TDict(TVar "k", TVar "v")]; ReturnType = TInt64 } + // __dict_to_rawptr : (Dict) -> RawPtr - convert dict to raw pointer (strips tag) + { Name = "__dict_to_rawptr"; TypeParams = ["k"; "v"]; ParamTypes = [TDict(TVar "k", TVar "v")]; ReturnType = TRawPtr } + // __rawptr_to_dict : (RawPtr, Int64) -> Dict - create dict from pointer + tag + { Name = "__rawptr_to_dict"; TypeParams = ["k"; "v"]; ParamTypes = [TRawPtr; TInt64]; ReturnType = TDict(TVar "k", TVar "v") } + + // Key intrinsics - for generic key hashing and comparison + // __hash : (k) -> Int64 - hash any key type + { Name = "__hash"; TypeParams = ["k"]; ParamTypes = [TVar "k"]; ReturnType = TInt64 } + // __key_eq : (k, k) -> Bool - compare two keys for equality + { Name = "__key_eq"; TypeParams = ["k"]; ParamTypes = [TVar "k"; TVar "k"]; ReturnType = TBool } + + // List intrinsics - for Finger Tree implementation + // __list_empty : () -> List - create empty list (null pointer with tag 0) + { Name = "__list_empty"; TypeParams = ["a"]; ParamTypes = []; ReturnType = TList(TVar "a") } + // __list_is_null : (List) -> Bool - check if list is empty/null + { Name = "__list_is_null"; TypeParams = ["a"]; ParamTypes = [TList(TVar "a")]; ReturnType = TBool } + // __list_get_tag : (List) -> Int64 - get tag bits from list pointer (low 3 bits) + { Name = "__list_get_tag"; TypeParams = ["a"]; ParamTypes = [TList(TVar "a")]; ReturnType = TInt64 } + // __list_to_rawptr : (List) -> RawPtr - convert list to raw pointer (strips tag) + { Name = "__list_to_rawptr"; TypeParams = ["a"]; ParamTypes = [TList(TVar "a")]; ReturnType = TRawPtr } + // __rawptr_to_list : (RawPtr, Int64) -> List - create list from pointer + tag + { Name = "__rawptr_to_list"; TypeParams = ["a"]; ParamTypes = [TRawPtr; TInt64]; ReturnType = TList(TVar "a") } +] + +/// All intrinsic Stdlib modules +let allModules : ModuleDef list = [ + int64IntrinsicModule + floatIntrinsicModule + fileModule + pathModule + platformModule + randomModule + dateModule +] + +/// Build the module registry from all modules +/// Maps qualified function names (e.g., "Stdlib.Int64.add") to their definitions +let buildModuleRegistry () : ModuleRegistry = + let moduleFuncs = + allModules + |> List.collect (fun m -> + m.Functions + |> List.map (fun f -> ($"{m.Name}.{f.Name}", f))) + // Add raw memory intrinsics directly (no module prefix) + let rawMemFuncs = + rawMemoryIntrinsics + |> List.map (fun f -> (f.Name, f)) + (moduleFuncs @ rawMemFuncs) + |> Map.ofList + +/// Get a function, trying with Stdlib prefix if not found +/// This allows writing Option.isSome instead of Stdlib.Option.isSome +/// Returns both the function and the resolved name (which may differ from the input) +let tryGetFunctionWithFallback (registry: ModuleRegistry) (qualifiedName: string) : (ModuleFunc * string) option = + let tryLookupName (name: string) : (ModuleFunc * string) option = + match Map.tryFind name registry with + | Some f -> + Some (f, name) + | None -> + // Legacy compatibility: many upstream tests still reference *_v0 names. + if name.EndsWith("_v0") then + let canonicalName = name.Substring(0, name.Length - 3) + match Map.tryFind canonicalName registry with + | Some f -> + Some (f, canonicalName) + | None -> + None + else + None + + match tryLookupName qualifiedName with + | Some resolved -> + Some resolved + | None -> + // Try with Stdlib prefix if name has at least one dot (Module.func) + if qualifiedName.Contains(".") && not (qualifiedName.StartsWith("Stdlib.")) then + tryLookupName ("Stdlib." + qualifiedName) + else + None + +/// Get the type of a module function as an AST.Type +let getFunctionType (func: ModuleFunc) : Type = + TFunction (func.ParamTypes, func.ReturnType) diff --git a/backend/src/LibCompiler/X86_64.fs b/backend/src/LibCompiler/X86_64.fs new file mode 100644 index 0000000000..f03e8dc1f4 --- /dev/null +++ b/backend/src/LibCompiler/X86_64.fs @@ -0,0 +1,134 @@ +// X86_64.fs - x86-64 Instruction Types +// +// Defines x86-64 instruction and register types. +// +// x86-64 is a CISC architecture with variable-length instructions (1-15 bytes). +// These types represent x86-64 assembly instructions that will be encoded +// to machine code by the x86_64 encoding pass. +// +// Register conventions (System V AMD64 ABI - Linux): +// - RDI, RSI, RDX, RCX, R8, R9: Integer argument registers +// - XMM0-XMM7: Floating-point argument registers +// - RAX: Return value +// - RBX, RBP, R12-R15: Callee-saved +// - RSP: Stack pointer +// +// Syscall conventions (Linux): +// - RAX: Syscall number +// - RDI, RSI, RDX, R10, R8, R9: Syscall arguments +// - Invoked via SYSCALL instruction + +module X86_64 + +/// x86-64 general-purpose registers (64-bit) +type Reg = + | RAX | RBX | RCX | RDX + | RSI | RDI | RBP | RSP + | R8 | R9 | R10 | R11 + | R12 | R13 | R14 | R15 + +/// x86-64 SSE/AVX floating-point registers (128-bit, used as 64-bit double) +type FReg = + | XMM0 | XMM1 | XMM2 | XMM3 + | XMM4 | XMM5 | XMM6 | XMM7 + | XMM8 | XMM9 | XMM10 | XMM11 + | XMM12 | XMM13 | XMM14 | XMM15 + +/// Comparison conditions (for SETcc/Jcc) +type Condition = + | EQ // Equal (ZF=1) + | NE // Not equal (ZF=0) + | LT // Less than (signed: SF!=OF) + | GT // Greater than (signed: ZF=0 and SF=OF) + | LE // Less than or equal (signed: ZF=1 or SF!=OF) + | GE // Greater than or equal (signed: SF=OF) + // Unsigned/float conditions (for use after UCOMISD): + | B // Below (CF=1) — float less than + | A // Above (CF=0 and ZF=0) — float greater than + | BE // Below or equal (CF=1 or ZF=1) — float less or equal + | AE // Above or equal (CF=0) — float greater or equal + | P // Parity set (PF=1) — unordered (NaN) + | NP // Parity not set (PF=0) — ordered (not NaN) + +/// Operand size for instructions that need explicit sizing +type Size = + | Byte // 8-bit + | Word // 16-bit + | DWord // 32-bit + | QWord // 64-bit + +/// x86-64 instruction types +type Instr = + // Data movement + | MOV_imm of dest:Reg * imm:int64 // MOV reg, imm64 (movabs for 64-bit) + | MOV_imm32 of dest:Reg * imm:int32 // MOV reg, imm32 (sign-extended to 64-bit) + | MOV_reg of dest:Reg * src:Reg // MOV reg, reg + | MOV_load of dest:Reg * baseAddr:Reg * offset:int32 // MOV reg, [base + offset] + | MOV_store of baseAddr:Reg * offset:int32 * src:Reg // MOV [base + offset], reg + | MOV_reg32 of dest:Reg * src:Reg // MOV r32, r32 (zero-extends to 64-bit) + | MOVZX_byte of dest:Reg * src:Reg // MOVZX reg, reg8 (zero-extend byte) + | MOVZX_word of dest:Reg * src:Reg // MOVZX reg, reg16 (zero-extend word) + | MOVSX_byte of dest:Reg * src:Reg // MOVSX reg, reg8 (sign-extend byte) + | MOVSX_word of dest:Reg * src:Reg // MOVSX reg, reg16 (sign-extend word) + | MOVSXD of dest:Reg * src:Reg // MOVSXD reg64, reg32 (sign-extend dword) + | LEA of dest:Reg * baseAddr:Reg * offset:int32 // LEA reg, [base + offset] + | LEA_rip of dest:Reg * label:string // LEA reg, [RIP + label] + // Stack operations + | PUSH of Reg + | POP of Reg + // Arithmetic + | ADD_imm of dest:Reg * imm:int32 + | ADD_reg of dest:Reg * src:Reg + | SUB_imm of dest:Reg * imm:int32 + | SUB_reg of dest:Reg * src:Reg + | IMUL_reg of dest:Reg * src:Reg // Signed multiply: dest = dest * src + | IMUL_imm of dest:Reg * src:Reg * imm:int32 // Signed multiply: dest = src * imm + | IDIV of src:Reg // Signed divide: RDX:RAX / src → RAX=quot, RDX=rem + | DIV of src:Reg // Unsigned divide: RDX:RAX / src → RAX=quot, RDX=rem + | NEG of dest:Reg // Negate: dest = -dest + | NOT of dest:Reg // Bitwise NOT: dest = ~dest + | CQO // Sign-extend RAX into RDX:RAX (before IDIV) + | XOR_reg of dest:Reg * src:Reg // XOR for zeroing or bitwise xor + // Comparison and conditional + | CMP_imm of src:Reg * imm:int32 + | CMP_reg of src1:Reg * src2:Reg + | TEST_reg of src1:Reg * src2:Reg // TEST reg, reg (AND without storing, sets flags) + | SETcc of cond:Condition * dest:Reg // Set byte to 0/1 based on condition + // Bitwise + | AND_imm of dest:Reg * imm:int32 + | AND_reg of dest:Reg * src:Reg + | OR_reg of dest:Reg * src:Reg + | SHL_imm of dest:Reg * shift:int // Shift left by immediate + | SHR_imm of dest:Reg * shift:int // Logical shift right by immediate + | SHL_cl of dest:Reg // Shift left by CL register + | SHR_cl of dest:Reg // Logical shift right by CL register + // Byte-level memory + | MOV_store_byte of baseAddr:Reg * offset:int32 * src:Reg // MOV [base + offset], src8 + | MOV_load_byte of dest:Reg * baseAddr:Reg * offset:int32 // MOVZX dest, byte [base + offset] + // Control flow + | CALL of label:string // CALL rel32 + | CALL_reg of reg:Reg // CALL reg (indirect) + | JMP of label:string // JMP rel32 + | JMP_reg of reg:Reg // JMP reg (indirect, for tail calls) + | Jcc of cond:Condition * label:string // Conditional jump to label + | RET + | SYSCALL // Linux syscall + | Label of string // Pseudo-instruction: marks a label position + // Floating-point (SSE2) + | MOVSD_load of dest:FReg * baseAddr:Reg * offset:int32 // Load double from [base + offset] + | MOVSD_store of baseAddr:Reg * offset:int32 * src:FReg // Store double to [base + offset] + | MOVSD_reg of dest:FReg * src:FReg // Move between XMM registers + | ADDSD of dest:FReg * src:FReg // Add double + | SUBSD of dest:FReg * src:FReg // Subtract double + | MULSD of dest:FReg * src:FReg // Multiply double + | DIVSD of dest:FReg * src:FReg // Divide double + | XORPD of dest:FReg * src:FReg // XOR packed double (for negation/zeroing) + | SQRTSD of dest:FReg * src:FReg // Square root double + | UCOMISD of src1:FReg * src2:FReg // Compare doubles (sets flags) + | CVTSI2SD of dest:FReg * src:Reg // Convert int64 to double + | CVTTSD2SI of dest:Reg * src:FReg // Convert double to int64 (truncate) + | MOVQ_to_gp of dest:Reg * src:FReg // Move 64 bits from XMM to GP + | MOVQ_from_gp of dest:FReg * src:Reg // Move 64 bits from GP to XMM + +/// Machine code (variable-length byte sequence for one instruction) +type MachineCode = byte array diff --git a/backend/src/LibCompiler/passes/1.5_TypeChecking.fs b/backend/src/LibCompiler/passes/1.5_TypeChecking.fs new file mode 100644 index 0000000000..e87a798fa6 --- /dev/null +++ b/backend/src/LibCompiler/passes/1.5_TypeChecking.fs @@ -0,0 +1,4808 @@ +// 1.5_TypeChecking.fs - Type Checking Pass (Phase 0) +// +// Simple top-down type checker for the Dark compiler. +// +// Design: +// - Function parameters and return types REQUIRE explicit type signatures (Phase 4+) +// - Let bindings have optional type annotations (Phase 1+) +// - Type checking proceeds top-down (expression context known from surrounding code) +// - No type inference - when type cannot be determined from context, require annotation +// +// Current Phase 0 implementation: +// - Only integers supported (TInt64) +// - All operations must be on integers +// - Returns Result for functional error handling +// +// Example: +// Input: 2 + 3 * 4 +// Output: Ok TInt64 + +module TypeChecking + +open AST + +/// Generate unique parameter names for partial application +/// Includes function name to avoid variable capture with nested partial applications +let private makePartialParams (funcName: string) (types: Type list) : (string * Type) list = + let safeName = funcName.Replace('.', '_') + types |> List.mapi (fun i t -> ($"__partial_{safeName}_{i}", t)) + +let private toCallArgs (args: Expr list) : NonEmptyList = + match args with + | [] -> NonEmptyList.singleton UnitLiteral + | _ -> NonEmptyList.fromList args + +let private normalizeNullaryCallArgs (expectedParamCount: int) (args: Expr list) : Expr list = + if expectedParamCount = 0 && args = [UnitLiteral] then + [] + else + args + +let private toLambdaParams (parameters: (string * Type) list) : NonEmptyList = + match NonEmptyList.tryFromList parameters with + | Some nel -> nel + | None -> Crash.crash "Type checker attempted to construct a lambda with zero parameters" + +/// Type errors +type TypeError = + | TypeMismatch of expected:Type * actual:Type * context:string + | IfBranchTypeMismatch of expected:Type * actual:Type + | UndefinedVariable of name:string + | UndefinedCallTarget of name:string + | MissingTypeAnnotation of context:string + | InvalidOperation of op:string * types:Type list + | GenericError of string + +/// Pretty-print a type for error messages +let rec typeToString (t: Type) : string = + match t with + | TInt8 -> "Int8" + | TInt16 -> "Int16" + | TInt32 -> "Int32" + | TInt64 -> "Int64" + | TInt128 -> "Int128" + | TUInt8 -> "UInt8" + | TUInt16 -> "UInt16" + | TUInt32 -> "UInt32" + | TUInt64 -> "UInt64" + | TUInt128 -> "UInt128" + | TBool -> "Bool" + | TFloat64 -> "Float" + | TString -> "String" + | TBytes -> "Bytes" + | TChar -> "Char" + | TUnit -> "Unit" + | TRuntimeError -> "RuntimeError" + | TFunction (params', ret) -> + let paramStr = params' |> List.map typeToString |> String.concat ", " + $"({paramStr}) -> {typeToString ret}" + | TTuple elemTypes -> + let elemsStr = elemTypes |> List.map typeToString |> String.concat ", " + $"({elemsStr})" + | TRecord (name, []) -> name + | TRecord (name, typeArgs) -> + let argsStr = typeArgs |> List.map typeToString |> String.concat ", " + $"{name}<{argsStr}>" + | TSum (name, []) -> name + | TSum (name, typeArgs) -> + let argsStr = typeArgs |> List.map typeToString |> String.concat ", " + $"{name}<{argsStr}>" + | TList elemType -> $"List<{typeToString elemType}>" + | TVar name -> name // Type variable (for generics) + | TRawPtr -> "RawPtr" // Internal raw pointer type + | TDict (keyType, valueType) -> $"Dict<{typeToString keyType}, {typeToString valueType}>" + +/// Pretty-print a type error +let typeErrorToString (err: TypeError) : string = + match err with + | TypeMismatch (expected, actual, context) -> + $"Type mismatch in {context}: expected {typeToString expected}, got {typeToString actual}" + | IfBranchTypeMismatch (expected, actual) -> + $"Type mismatch: if branches must have same type: expected {typeToString expected}, got {typeToString actual}" + | UndefinedVariable name -> + $"Undefined variable: {name}" + | UndefinedCallTarget name -> + $"There is no variable named: {name}" + | MissingTypeAnnotation context -> + $"Missing type annotation: {context}" + | InvalidOperation (op, types) -> + let typesStr = types |> List.map typeToString |> String.concat ", " + $"Invalid operation '{op}' on types: {typesStr}" + | GenericError msg -> + msg + +let private withIndefiniteArticle (s: string) : string = + if s.Length = 0 then + s + else + match System.Char.ToLowerInvariant(s.[0]) with + | 'a' + | 'e' + | 'i' + | 'o' + | 'u' -> $"an {s}" + | _ -> $"a {s}" + +let private describeIfConditionActual (expr: Expr) (actualType: Type) : string = + match expr with + | UnitLiteral -> "Unit (())" + | Int64Literal i -> $"Int64 ({i})" + | Int128Literal i -> $"Int128 ({i})" + | Int8Literal i -> $"Int8 ({i})" + | Int16Literal i -> $"Int16 ({i})" + | Int32Literal i -> $"Int32 ({i})" + | UInt8Literal i -> $"UInt8 ({i})" + | UInt16Literal i -> $"UInt16 ({i})" + | UInt32Literal i -> $"UInt32 ({i})" + | UInt64Literal i -> $"UInt64 ({i})" + | UInt128Literal i -> $"UInt128 ({i})" + | StringLiteral s -> $"String (\"{s}\")" + | CharLiteral s -> $"Char (\"{s}\")" + | FloatLiteral f -> $"Float ({f})" + | BoolLiteral true -> "Bool (true)" + | BoolLiteral false -> "Bool (false)" + | _ -> typeToString actualType + +let private ifConditionTypeMismatchMessage (expr: Expr) (actualType: Type) : string = + let actual = describeIfConditionActual expr actualType + $"Encountered a condition that must be a Bool, but got {withIndefiniteArticle actual}" + +let private describeInterpolationActual (expr: Expr) (actualType: Type) : string = + match expr with + | FloatLiteral f -> $"a Float ({f})" + | Int64Literal i -> $"an Int64 ({i})" + | _ -> withIndefiniteArticle (typeToString actualType) + +let private interpolationTypeMismatchMessage (expr: Expr) (actualType: Type) : string = + let actual = describeInterpolationActual expr actualType + $"Expected String in string interpolation, got {actual} instead" + +let private isBuiltinUnwrapName (funcName: string) : bool = + funcName = "Builtin.unwrap" || funcName = "Stdlib.Builtin.unwrap" + +let private isBuiltinTestRuntimeErrorName (funcName: string) : bool = + funcName = "Builtin.testRuntimeError" || funcName = "Stdlib.Builtin.testRuntimeError" + +let private isBuiltinTestNanName (name: string) : bool = + name = "Builtin.testNan" || name = "Stdlib.Builtin.testNan" + +let private isRuntimeErrorType (typ: Type) : bool = + match typ with + | TRuntimeError -> true + | _ -> false + +let private variantNameEndsWith (suffix: string) (variantName: string) : bool = + variantName = suffix || variantName.EndsWith($".{suffix}") + +let private isKnownFailureConstructorExpr (expr: Expr) : bool = + match expr with + | Constructor (_, variantName, None) when variantNameEndsWith "None" variantName -> + true + | Constructor (_, variantName, Some _) when variantNameEndsWith "Error" variantName -> + true + | _ -> + false + +/// Detect runtime-failing unwrap expressions, including piped/desugared shapes: +/// let x = Option.None in Builtin.unwrap(x) +let rec private isKnownUnwrapFailureExpr (boundExprs: Map) (expr: Expr) : bool = + let rec argIsKnownFailure (argExpr: Expr) : bool = + if isKnownFailureConstructorExpr argExpr then + true + else + match argExpr with + | Var varName -> + boundExprs + |> Map.tryFind varName + |> Option.exists argIsKnownFailure + | _ -> + false + + match expr with + | Call (funcName, { Head = argExpr; Tail = [] }) when isBuiltinUnwrapName funcName -> + argIsKnownFailure argExpr + | Let (name, valueExpr, bodyExpr) -> + isKnownUnwrapFailureExpr (Map.add name valueExpr boundExprs) bodyExpr + | _ -> + false + +/// Detect known runtime-failing testRuntimeError expressions, including let-bound forms. +let rec private isKnownTestRuntimeErrorExpr (boundExprs: Map) (expr: Expr) : bool = + match expr with + | Call (funcName, { Head = _; Tail = [] }) when isBuiltinTestRuntimeErrorName funcName -> + true + | Let (name, valueExpr, bodyExpr) -> + isKnownTestRuntimeErrorExpr (Map.add name valueExpr boundExprs) bodyExpr + | Var varName -> + boundExprs + |> Map.tryFind varName + |> Option.exists (fun boundExpr -> isKnownTestRuntimeErrorExpr boundExprs boundExpr) + | _ -> + false + +let rec private tryExtractStringLiteral (boundExprs: Map) (expr: Expr) : string option = + match expr with + | StringLiteral s -> + Some s + | Var varName -> + match Map.tryFind varName boundExprs with + | Some boundExpr -> + tryExtractStringLiteral boundExprs boundExpr + | None -> + // Keep a stable diagnostic when the value is only known at runtime + // (for example a function parameter passed into Builtin.testRuntimeError). + Some varName + | Let (name, valueExpr, bodyExpr) -> + let boundExprs' = Map.add name valueExpr boundExprs + tryExtractStringLiteral boundExprs' bodyExpr + | _ -> + None + +/// Extract the error message from a known Builtin.testRuntimeError expression, if statically available. +let rec private tryExtractKnownTestRuntimeErrorMessage + (boundExprs: Map) + (expr: Expr) + : string option = + match expr with + | Call (funcName, { Head = argExpr; Tail = [] }) when isBuiltinTestRuntimeErrorName funcName -> + tryExtractStringLiteral boundExprs argExpr + | Let (name, valueExpr, bodyExpr) -> + let boundExprs' = Map.add name valueExpr boundExprs + tryExtractKnownTestRuntimeErrorMessage boundExprs' bodyExpr + | Var varName -> + boundExprs + |> Map.tryFind varName + |> Option.bind (tryExtractKnownTestRuntimeErrorMessage boundExprs) + | _ -> + None + +let private tryFormatLiteralValue (expr: Expr) : string option = + match expr with + | UnitLiteral -> Some "()" + | Int64Literal i -> Some (string i) + | Int128Literal i -> Some (string i) + | Int8Literal i -> Some (string i) + | Int16Literal i -> Some (string i) + | Int32Literal i -> Some (string i) + | UInt8Literal i -> Some (string i) + | UInt16Literal i -> Some (string i) + | UInt32Literal i -> Some (string i) + | UInt64Literal i -> Some (string i) + | UInt128Literal i -> Some (string i) + | BoolLiteral true -> Some "true" + | BoolLiteral false -> Some "false" + | StringLiteral s -> Some $"\"{s}\"" + | CharLiteral c -> Some $"'{c}'" + | FloatLiteral f -> Some (string f) + | _ -> None + +let private formatFloatLiteralForPatternMismatch (f: float) : string = + let formatted = string f + if formatted.Contains(".") || formatted.Contains("e") || formatted.Contains("E") then + formatted + else + $"{formatted}.0" + +let private formatListLiteralForNoMatch (elements: Expr list) : string = + match elements with + | [] -> "[]" + | _ -> + let elementTexts = + elements + |> List.map (fun element -> + match tryFormatLiteralValue element with + | Some text -> text + | None -> "") + let joinedElements = String.concat ", " elementTexts + $"[ {joinedElements}]" + +let rec private formatPatternMismatchValue (expr: Expr) : string option = + match expr with + | ListLiteral (first :: second :: _) -> + let firstText = + match formatPatternMismatchValue first with + | Some text -> text + | None -> "" + let secondText = + match formatPatternMismatchValue second with + | Some text -> text + | None -> "" + Some $"[ {firstText}, {secondText}, ..." + | ListLiteral [single] -> + // For singleton list mismatches, report the mismatched element value. + formatPatternMismatchValue single + | ListLiteral [] -> + Some "[]" + | FloatLiteral f -> + Some (formatFloatLiteralForPatternMismatch f) + | TupleLiteral elements -> + let elementTexts = + elements + |> List.map (fun element -> + match formatPatternMismatchValue element with + | Some text -> text + | None -> "") + let tupleText = String.concat ", " elementTexts + Some $"({tupleText})" + | _ -> + tryFormatLiteralValue expr + +let rec private narrowPatternMismatchExprByType (actualType: Type) (expr: Expr) : Expr = + match actualType, expr with + | TList _, _ -> expr + | TTuple _, _ -> expr + | _, ListLiteral (first :: _) -> narrowPatternMismatchExprByType actualType first + | _, TupleLiteral (first :: _) -> narrowPatternMismatchExprByType actualType first + | _, _ -> expr + +let private patternMismatchActualTypeText (actualType: Type) (_scrutineeExpr: Expr) : string = + typeToString actualType + +let private formatPatternMismatchError + (scrutineeExpr: Expr) + (actualType: Type) + (expectedPatternType: Type) + (expectedPatternTypeTextOverride: string option) + : string = + let narrowedExpr = narrowPatternMismatchExprByType actualType scrutineeExpr + let valueText = + match formatPatternMismatchValue narrowedExpr with + | Some text -> text + | None -> "" + let expectedPatternText = + match expectedPatternTypeTextOverride with + | Some typeText -> withIndefiniteArticle typeText + | None -> withIndefiniteArticle (typeToString expectedPatternType) + let actualTypeText = patternMismatchActualTypeText actualType scrutineeExpr + $"Cannot match {actualTypeText} value {valueText} with {expectedPatternText} pattern" + +let private formatLegacyParamTypeError + (functionName: string) + (paramIndex: int) + (paramName: string) + (expectedType: Type) + (actualType: Type) + (actualExpr: Expr) + : string = + let ordinal = + match paramIndex with + | 1 -> "1st" + | 2 -> "2nd" + | 3 -> "3rd" + | _ -> $"{paramIndex}th" + + let actualValue = + match tryFormatLiteralValue actualExpr with + | Some v -> v + | None -> typeToString actualType + + $"{functionName}'s {ordinal} parameter `{paramName}` expects {typeToString expectedType}, but got {typeToString actualType} ({actualValue})" + +/// Freshen type parameters - generate new unique names for each type param +/// Returns (fresh type params, substitution map from old to fresh names) +/// Uses index-based naming for deterministic compilation (no global state) +let freshenTypeParams (typeParams: string list) : string list * Map = + let freshParams = typeParams |> List.mapi (fun i baseName -> $"{baseName}${i}") + let subst = List.zip typeParams freshParams |> Map.ofList + (freshParams, subst) + +/// Apply type variable renaming to a type +let rec applyTypeVarRenaming (subst: Map) (t: Type) : Type = + match t with + | TVar name -> + match Map.tryFind name subst with + | Some newName -> TVar newName + | None -> t + | TList elem -> TList (applyTypeVarRenaming subst elem) + | TDict (k, v) -> TDict (applyTypeVarRenaming subst k, applyTypeVarRenaming subst v) + | TFunction (paramTypes, retType) -> + TFunction (List.map (applyTypeVarRenaming subst) paramTypes, applyTypeVarRenaming subst retType) + | TTuple elems -> TTuple (List.map (applyTypeVarRenaming subst) elems) + | TSum (name, args) -> TSum (name, List.map (applyTypeVarRenaming subst) args) + | TRecord (name, args) -> TRecord (name, List.map (applyTypeVarRenaming subst) args) + | TInt8 | TInt16 | TInt32 | TInt64 | TInt128 + | TUInt8 | TUInt16 | TUInt32 | TUInt64 | TUInt128 + | TBool | TFloat64 | TString | TBytes | TChar | TUnit | TRuntimeError | TRawPtr -> t + +/// Type environment - maps variable names to their types +type TypeEnv = Map + +/// Function parameter-name registry - maps function names to ordered parameter names +type FuncParamNameRegistry = Map + +/// Type registry - maps record type names to their field definitions +type TypeRegistry = Map + +/// Sum type registry - maps sum type names to their variant lists (name, tag, payload) +type SumTypeRegistry = Map + +/// Variant lookup - maps variant names to (type name, type params, tag index, payload type) +/// Type params are the generic type parameters of the containing sum type +type VariantLookup = Map + +/// Generic function registry and call-site policy controls. +/// `Functions` contains entries only for functions that have type parameters. +type GenericFuncRegistry = { + Functions: Map + RequireExplicitTypeArgsForBareCalls: bool +} + +/// Alias registry - maps type alias names to (type params, target type) +/// Example: type Id = String -> ("Id", ([], TString)) +/// Example: type Outer = Inner -> ("Outer", (["a"], TSum("Inner", [TVar "a"; TInt64]))) +type AliasRegistry = Map + +/// Type substitution - maps type variable names to concrete types +type Substitution = Map + +/// Collected type checking environment - can be passed to compile user code with stdlib +type TypeCheckEnv = { + TypeReg: TypeRegistry + VariantLookup: VariantLookup + FuncEnv: TypeEnv + FuncParamNames: FuncParamNameRegistry + GenericFuncReg: GenericFuncRegistry + ModuleRegistry: ModuleRegistry + AliasReg: AliasRegistry +} + +/// Merge two TypeCheckEnv, with overlay taking precedence on conflicts +/// Used for separate compilation: merge stdlib env with user env +let mergeTypeCheckEnv (baseEnv: TypeCheckEnv) (overlay: TypeCheckEnv) : TypeCheckEnv = + let mergeMap m1 m2 = Map.fold (fun acc k v -> Map.add k v acc) m1 m2 + { + TypeReg = mergeMap baseEnv.TypeReg overlay.TypeReg + VariantLookup = mergeMap baseEnv.VariantLookup overlay.VariantLookup + FuncEnv = mergeMap baseEnv.FuncEnv overlay.FuncEnv + FuncParamNames = mergeMap baseEnv.FuncParamNames overlay.FuncParamNames + GenericFuncReg = { + Functions = mergeMap baseEnv.GenericFuncReg.Functions overlay.GenericFuncReg.Functions + RequireExplicitTypeArgsForBareCalls = + baseEnv.GenericFuncReg.RequireExplicitTypeArgsForBareCalls + || overlay.GenericFuncReg.RequireExplicitTypeArgsForBareCalls + } + ModuleRegistry = baseEnv.ModuleRegistry // Module registry is constant, use base + AliasReg = mergeMap baseEnv.AliasReg overlay.AliasReg + } + +/// Resolve a type name through the alias registry +/// If the name is an alias, recursively resolve to the underlying type name +let rec resolveTypeName (aliasReg: AliasRegistry) (typeName: string) : string = + match Map.tryFind typeName aliasReg with + | Some ([], TRecord (targetName, _)) -> resolveTypeName aliasReg targetName + | _ -> typeName + +/// Apply a substitution to a type, replacing type variables with concrete types +let rec private applySubstWithSeen (seen: Set) (subst: Substitution) (typ: Type) : Type = + match typ with + | TVar name -> + if Set.contains name seen then + typ + else + let seen' = Set.add name seen + match Map.tryFind name subst with + | Some concreteType -> + applySubstWithSeen seen' subst concreteType + | None -> + typ // Unbound type variable remains as-is + | TFunction (paramTypes, returnType) -> + TFunction (List.map (applySubstWithSeen seen subst) paramTypes, applySubstWithSeen seen subst returnType) + | TTuple elemTypes -> + TTuple (List.map (applySubstWithSeen seen subst) elemTypes) + | TRecord (name, typeArgs) -> + TRecord (name, List.map (applySubstWithSeen seen subst) typeArgs) + | TList elemType -> + TList (applySubstWithSeen seen subst elemType) + | TSum (name, typeArgs) -> + TSum (name, List.map (applySubstWithSeen seen subst) typeArgs) + | TDict (keyType, valueType) -> + TDict (applySubstWithSeen seen subst keyType, applySubstWithSeen seen subst valueType) + | TInt8 | TInt16 | TInt32 | TInt64 | TInt128 + | TUInt8 | TUInt16 | TUInt32 | TUInt64 | TUInt128 + | TBool | TFloat64 | TString | TBytes | TChar | TUnit | TRuntimeError | TRawPtr -> + typ // Concrete types are unchanged + +/// Apply a substitution to a type, replacing type variables with concrete types +let applySubst (subst: Substitution) (typ: Type) : Type = + applySubstWithSeen Set.empty subst typ + +/// Collect type variable names in first-seen order. +let rec collectTypeVarsInType (typ: Type) (acc: string list) : string list = + let add name = + if List.contains name acc then acc else acc @ [name] + + match typ with + | TVar name -> add name + | TFunction (paramTypes, returnType) -> + let withParams = paramTypes |> List.fold (fun a t -> collectTypeVarsInType t a) acc + collectTypeVarsInType returnType withParams + | TTuple elemTypes -> + elemTypes |> List.fold (fun a t -> collectTypeVarsInType t a) acc + | TRecord (_, typeArgs) -> + typeArgs |> List.fold (fun a t -> collectTypeVarsInType t a) acc + | TSum (_, typeArgs) -> + typeArgs |> List.fold (fun a t -> collectTypeVarsInType t a) acc + | TList elemType -> + collectTypeVarsInType elemType acc + | TDict (keyType, valueType) -> + let withKey = collectTypeVarsInType keyType acc + collectTypeVarsInType valueType withKey + | TInt8 | TInt16 | TInt32 | TInt64 | TInt128 + | TUInt8 | TUInt16 | TUInt32 | TUInt64 | TUInt128 + | TBool | TFloat64 | TString | TBytes | TChar | TUnit | TRuntimeError | TRawPtr -> + acc + +/// Infer record type parameter order from field type variables. +/// This relies on first occurrence order of type variables in field types. +let inferRecordTypeParamsFromFields (fields: (string * Type) list) : string list = + fields |> List.fold (fun acc (_, fieldType) -> collectTypeVarsInType fieldType acc) [] + +/// Build a substitution for generic record fields from concrete type arguments. +let buildRecordFieldSubstitution (fields: (string * Type) list) (typeArgs: Type list) : Result = + let typeParams = inferRecordTypeParamsFromFields fields + if List.length typeParams <> List.length typeArgs then + Error + $"Record type argument arity mismatch: expected {List.length typeParams}, got {List.length typeArgs}" + else + Ok (List.zip typeParams typeArgs |> Map.ofList) + +/// Build a substitution from type parameters and type arguments +let buildSubstitution (typeParams: string list) (typeArgs: Type list) : Result = + if List.length typeParams <> List.length typeArgs then + Error $"Expected {List.length typeParams} type arguments, got {List.length typeArgs}" + else + Ok (List.zip typeParams typeArgs |> Map.ofList) + +let private typeArgumentLabel (count: int) : string = + if count = 1 then + "type argument" + else + "type arguments" + +let private argumentLabel (count: int) : string = + if count = 1 then + "argument" + else + "arguments" + +let private formatTypeArgumentArityError (funcName: string) (expectedCount: int) (actualCount: int) : string = + $"{funcName} expects {expectedCount} {typeArgumentLabel expectedCount}, but got {actualCount} {typeArgumentLabel actualCount}" + +let private formatValueArgumentArityError (funcName: string) (expectedCount: int) (actualCount: int) : string = + $"{funcName} expects {expectedCount} {argumentLabel expectedCount}, but got {actualCount} {argumentLabel actualCount}" + +/// Apply a type substitution to an expression +/// This is used to propagate concrete types through nested TypeApp nodes +let rec applySubstToExpr (subst: Substitution) (expr: Expr) : Expr = + match expr with + | UnitLiteral | Int64Literal _ | Int128Literal _ | Int8Literal _ | Int16Literal _ | Int32Literal _ + | UInt8Literal _ | UInt16Literal _ | UInt32Literal _ | UInt64Literal _ | UInt128Literal _ + | BoolLiteral _ | StringLiteral _ | CharLiteral _ | FloatLiteral _ | Var _ | FuncRef _ -> expr + | BinOp (op, left, right) -> + BinOp (op, applySubstToExpr subst left, applySubstToExpr subst right) + | UnaryOp (op, inner) -> + UnaryOp (op, applySubstToExpr subst inner) + | Let (name, value, body) -> + Let (name, applySubstToExpr subst value, applySubstToExpr subst body) + | If (cond, thenBr, elseBr) -> + If (applySubstToExpr subst cond, applySubstToExpr subst thenBr, applySubstToExpr subst elseBr) + | Call (funcName, args) -> + Call (funcName, NonEmptyList.map (applySubstToExpr subst) args) + | TypeApp (funcName, typeArgs, args) -> + // Apply substitution to both type arguments and value arguments + TypeApp (funcName, List.map (applySubst subst) typeArgs, NonEmptyList.map (applySubstToExpr subst) args) + | TupleLiteral elements -> + TupleLiteral (List.map (applySubstToExpr subst) elements) + | TupleAccess (tuple, index) -> + TupleAccess (applySubstToExpr subst tuple, index) + | RecordLiteral (typeName, fields) -> + RecordLiteral (typeName, List.map (fun (n, e) -> (n, applySubstToExpr subst e)) fields) + | RecordUpdate (record, updates) -> + RecordUpdate (applySubstToExpr subst record, List.map (fun (n, e) -> (n, applySubstToExpr subst e)) updates) + | RecordAccess (record, fieldName) -> + RecordAccess (applySubstToExpr subst record, fieldName) + | Constructor (typeName, variantName, payload) -> + Constructor (typeName, variantName, Option.map (applySubstToExpr subst) payload) + | Match (scrutinee, cases) -> + Match (applySubstToExpr subst scrutinee, + cases |> List.map (fun mc -> + { mc with Guard = mc.Guard |> Option.map (applySubstToExpr subst) + Body = applySubstToExpr subst mc.Body })) + | ListLiteral elements -> + ListLiteral (List.map (applySubstToExpr subst) elements) + | ListCons (heads, tail) -> + ListCons (List.map (applySubstToExpr subst) heads, applySubstToExpr subst tail) + | Lambda (params', body) -> + let concreteParams = + params' + |> NonEmptyList.map (fun (paramName, paramType) -> + (paramName, applySubst subst paramType)) + Lambda (concreteParams, applySubstToExpr subst body) + | Apply (func, args) -> + Apply (applySubstToExpr subst func, NonEmptyList.map (applySubstToExpr subst) args) + | Closure (funcName, captures) -> + Closure (funcName, List.map (applySubstToExpr subst) captures) + | InterpolatedString parts -> + InterpolatedString (parts |> List.map (function + | StringText s -> StringText s + | StringExpr e -> StringExpr (applySubstToExpr subst e))) + +/// Resolve a type by expanding any type aliases (recursively) +/// Returns the fully resolved type with all aliases replaced by their targets +let rec resolveType (aliasReg: AliasRegistry) (typ: Type) : Type = + match typ with + | TRecord (name, typeArgs) -> + // Resolve type arguments first. + let resolvedArgs = List.map (resolveType aliasReg) typeArgs + // Check if this record name is actually a type alias. + match Map.tryFind name aliasReg with + | Some (typeParams, targetType) -> + if List.length typeParams <> List.length resolvedArgs then + // Mismatched type args, return as-is (error caught elsewhere) + TRecord (name, resolvedArgs) + else + // Build substitution and apply to target type + let subst = List.zip typeParams resolvedArgs |> Map.ofList + let substituted = applySubst subst targetType + // Recursively resolve in case target is also an alias + resolveType aliasReg substituted + | None -> + // Not an alias, it's a real record type + TRecord (name, resolvedArgs) + | TSum (name, typeArgs) -> + // Check if this sum type name is actually a type alias + match Map.tryFind name aliasReg with + | Some (typeParams, targetType) -> + // Type alias with (possibly) type arguments + if List.length typeParams <> List.length typeArgs then + // Mismatched type args, return as-is (error caught elsewhere) + typ + else + // Build substitution and apply to target type + let subst = List.zip typeParams typeArgs |> Map.ofList + let substituted = applySubst subst targetType + // Recursively resolve in case target is also an alias + resolveType aliasReg substituted + | None -> + // Not an alias, resolve type arguments recursively + TSum (name, List.map (resolveType aliasReg) typeArgs) + | TFunction (paramTypes, returnType) -> + TFunction (List.map (resolveType aliasReg) paramTypes, resolveType aliasReg returnType) + | TTuple elemTypes -> + TTuple (List.map (resolveType aliasReg) elemTypes) + | TList elemType -> + TList (resolveType aliasReg elemType) + | TDict (keyType, valueType) -> + TDict (resolveType aliasReg keyType, resolveType aliasReg valueType) + | TVar _ | TInt8 | TInt16 | TInt32 | TInt64 | TInt128 + | TUInt8 | TUInt16 | TUInt32 | TUInt64 | TUInt128 + | TBool | TFloat64 | TString | TBytes | TChar | TUnit | TRuntimeError | TRawPtr -> + typ // Primitive types and type variables are unchanged + +/// Compare two types for equality, resolving type aliases first +/// This allows "Vec" and "Point" to be considered equal when Vec aliases Point +let typesEqual (aliasReg: AliasRegistry) (t1: Type) (t2: Type) : bool = + resolveType aliasReg t1 = resolveType aliasReg t2 + +let private truncateLegacyRecordValueText (text: string) : string = + if text.Length > 10 then + $"{text.Substring(0, 10)}..." + else + text + +let private formatLegacyRecordFieldTypeError + (aliasReg: AliasRegistry) + (fieldName: string) + (expectedType: Type) + (actualType: Type) + (actualExpr: Expr) + : string = + let expectedText = expectedType |> resolveType aliasReg |> typeToString + let actualText = actualType |> resolveType aliasReg |> typeToString + let valueText = + match tryFormatLiteralValue actualExpr with + | Some value -> + truncateLegacyRecordValueText value + | None -> + actualText + + $"Failed to create record. Expected {expectedText} for field `{fieldName}`, but got {valueText} ({withIndefiniteArticle actualText})" + +/// Internal type-app markers emitted during type checking. +/// These markers are materialized to direct calls before leaving this pass. +type private InternalTypeAppMarker = + | EqHelperDispatch + +/// Internal type-app values carried in `Expr.TypeApp` nodes. +/// We encode/decode them through marker names at the pass boundary. +type private InternalTypeApp = + | EqHelperDispatchTypeApp of targetType: Type * leftExpr: Expr * rightExpr: Expr + +let private internalTypeAppMarkerName (marker: InternalTypeAppMarker) : string = + match marker with + | EqHelperDispatch -> "__dark_internal_eq_helper_dispatch" + +let private tryParseInternalTypeAppMarker (funcName: string) : InternalTypeAppMarker option = + if funcName = internalTypeAppMarkerName EqHelperDispatch then + Some EqHelperDispatch + else + None + +let private makeInternalTypeApp (internalTypeApp: InternalTypeApp) : Expr = + match internalTypeApp with + | EqHelperDispatchTypeApp (targetType, leftExpr, rightExpr) -> + TypeApp ( + internalTypeAppMarkerName EqHelperDispatch, + [targetType], + NonEmptyList.fromList [leftExpr; rightExpr] + ) + +let private tryDecodeInternalTypeApp (expr: Expr) : InternalTypeApp option = + match expr with + | TypeApp (funcName, [targetType], { Head = leftExpr; Tail = [rightExpr] }) -> + match tryParseInternalTypeAppMarker funcName with + | Some EqHelperDispatch -> + Some (EqHelperDispatchTypeApp (targetType, leftExpr, rightExpr)) + | None -> + None + | _ -> + None + +let private sumTypeHasPayload (variantLookup: VariantLookup) (sumTypeName: string) : bool = + variantLookup + |> Map.exists (fun _ (variantTypeName, _, _, payloadTypeOpt) -> + variantTypeName = sumTypeName && payloadTypeOpt.IsSome) + +/// Only tuple/record and payload-carrying sums need generated helpers. +let private needsEqHelperForResolvedType (variantLookup: VariantLookup) (typ: Type) : bool = + match typ with + | TTuple _ + | TRecord _ -> + true + | TSum (sumTypeName, _) -> + sumTypeHasPayload variantLookup sumTypeName + | _ -> + false + +let private sanitizeHelperNamePrefix (input: string) : string = + let chars = + input + |> Seq.map (fun c -> if System.Char.IsLetterOrDigit c then c else '_') + |> Seq.truncate 48 + |> Seq.toArray + + if Array.isEmpty chars then + "type" + else + System.String(chars) + +/// Stable, deterministic hash used for generated helper function names. +let private stableHelperNameHash (input: string) : uint64 = + let initial = 14695981039346656037UL + let prime = 1099511628211UL + input + |> Seq.fold (fun acc ch -> (acc ^^^ uint64 (int ch)) * prime) initial + +/// Name for a concrete structural equality helper. +let private eqHelperName (typ: Type) : string = + let typeText = typeToString typ + let prefix = sanitizeHelperNamePrefix typeText + let hash = stableHelperNameHash typeText + $"__dark_eq_{prefix}_{hash:x16}" + +/// Build a left-associative boolean conjunction chain. +let private chainAndExpr (exprs: Expr list) : Expr = + match exprs with + | [] -> + BoolLiteral true + | first :: rest -> + List.fold (fun acc expr -> BinOp (And, acc, expr)) first rest + +/// Build an equality expression for two already type-checked operands. +/// For tuple/record/sum, emit a typed internal dispatch marker that will later +/// be rewritten to a call to the generated concrete helper function. +let private buildEqExprForType + (aliasReg: AliasRegistry) + (variantLookup: VariantLookup) + (typ: Type) + (leftExpr: Expr) + (rightExpr: Expr) + : Expr = + let resolvedType = resolveType aliasReg typ + match resolvedType with + | TFunction _ -> + // Preserve side effects/runtime errors by evaluating both sides. + Let ("__dark_eq_fn_pair", TupleLiteral [leftExpr; rightExpr], BoolLiteral true) + | TString -> + Call ("Stdlib.String.equals", NonEmptyList.fromList [leftExpr; rightExpr]) + | TList elemType -> + let resolvedElemType = resolveType aliasReg elemType + match resolvedElemType with + | TFunction _ -> + // Function-value equality is normalized to true, so list equality on + // function elements reduces to length equality. + let pairVar = "__dark_eq_list_pair" + let leftListExpr = TupleAccess (Var pairVar, 0) + let rightListExpr = TupleAccess (Var pairVar, 1) + Let ( + pairVar, + TupleLiteral [leftExpr; rightExpr], + BinOp ( + Eq, + TypeApp ("Stdlib.List.length", [resolvedElemType], NonEmptyList.singleton leftListExpr), + TypeApp ("Stdlib.List.length", [resolvedElemType], NonEmptyList.singleton rightListExpr) + ) + ) + | _ -> + TypeApp ("Stdlib.List.equals", [resolvedElemType], NonEmptyList.fromList [leftExpr; rightExpr]) + | _ when needsEqHelperForResolvedType variantLookup resolvedType -> + makeInternalTypeApp (EqHelperDispatchTypeApp (resolvedType, leftExpr, rightExpr)) + | _ -> + BinOp (Eq, leftExpr, rightExpr) + +// ============================================================================= +// Free Variable Analysis for Closures +// ============================================================================= +// When compiling lambdas, we need to identify which variables from the +// enclosing scope are referenced in the lambda body (free variables). +// Only these need to be captured in the closure. + +/// Collect free variables in an expression. +/// Returns the set of variable names that are referenced but not bound locally. +/// bound: Set of names that are currently in scope (not free) +let rec collectFreeVars (expr: Expr) (bound: Set) : Set = + match expr with + | UnitLiteral | Int64Literal _ | Int128Literal _ | Int8Literal _ | Int16Literal _ | Int32Literal _ + | UInt8Literal _ | UInt16Literal _ | UInt32Literal _ | UInt64Literal _ | UInt128Literal _ + | BoolLiteral _ | StringLiteral _ | CharLiteral _ | FloatLiteral _ -> + Set.empty + | Var name -> + if Set.contains name bound || isBuiltinTestNanName name then + Set.empty + else + Set.singleton name + | BinOp (_, left, right) -> + Set.union (collectFreeVars left bound) (collectFreeVars right bound) + | UnaryOp (_, inner) -> + collectFreeVars inner bound + | Let (name, value, body) -> + let valueFree = collectFreeVars value bound + let bodyFree = collectFreeVars body (Set.add name bound) + Set.union valueFree bodyFree + | If (cond, thenBranch, elseBranch) -> + let condFree = collectFreeVars cond bound + let thenFree = collectFreeVars thenBranch bound + let elseFree = collectFreeVars elseBranch bound + Set.union condFree (Set.union thenFree elseFree) + | Call (_, args) -> + args + |> NonEmptyList.toList + |> List.map (fun e -> collectFreeVars e bound) + |> List.fold Set.union Set.empty + | TypeApp (_, _, args) -> + args + |> NonEmptyList.toList + |> List.map (fun e -> collectFreeVars e bound) + |> List.fold Set.union Set.empty + | TupleLiteral elements -> + elements |> List.map (fun e -> collectFreeVars e bound) |> List.fold Set.union Set.empty + | TupleAccess (tuple, _) -> + collectFreeVars tuple bound + | RecordLiteral (_, fields) -> + fields |> List.map (fun (_, e) -> collectFreeVars e bound) |> List.fold Set.union Set.empty + | RecordUpdate (record, updates) -> + let recordFree = collectFreeVars record bound + let updatesFree = updates |> List.map (fun (_, e) -> collectFreeVars e bound) |> List.fold Set.union Set.empty + Set.union recordFree updatesFree + | RecordAccess (record, _) -> + collectFreeVars record bound + | Constructor (_, _, payload) -> + payload |> Option.map (fun e -> collectFreeVars e bound) |> Option.defaultValue Set.empty + | Match (scrutinee, cases) -> + let scrutineeFree = collectFreeVars scrutinee bound + let casesFree = cases |> List.map (fun matchCase -> + // Collect bindings from all patterns (all patterns in a group bind same vars) + let patternBindings = + matchCase.Patterns + |> NonEmptyList.toList + |> List.map collectPatternBindings + |> List.fold Set.union Set.empty + let bodyBound = Set.union bound patternBindings + // Include guard free vars if present + let guardFree = matchCase.Guard |> Option.map (fun g -> collectFreeVars g bodyBound) |> Option.defaultValue Set.empty + let bodyFree = collectFreeVars matchCase.Body bodyBound + Set.union guardFree bodyFree) + Set.union scrutineeFree (casesFree |> List.fold Set.union Set.empty) + | ListLiteral elements -> + elements |> List.map (fun e -> collectFreeVars e bound) |> List.fold Set.union Set.empty + | ListCons (headElements, tail) -> + let headsFree = headElements |> List.map (fun e -> collectFreeVars e bound) |> List.fold Set.union Set.empty + let tailFree = collectFreeVars tail bound + Set.union headsFree tailFree + | Lambda (parameters, body) -> + let paramNames = parameters |> NonEmptyList.toList |> List.map fst |> Set.ofList + collectFreeVars body (Set.union bound paramNames) + | Apply (func, args) -> + let funcFree = collectFreeVars func bound + let argsFree = + args + |> NonEmptyList.toList + |> List.map (fun e -> collectFreeVars e bound) + |> List.fold Set.union Set.empty + Set.union funcFree argsFree + | FuncRef _ -> + // Function references don't contribute free variables + Set.empty + | Closure (_, captures) -> + // Closures capture expressions which may have free variables + captures |> List.map (fun e -> collectFreeVars e bound) |> List.fold Set.union Set.empty + | InterpolatedString parts -> + parts |> List.choose (fun part -> + match part with + | StringText _ -> None + | StringExpr e -> Some (collectFreeVars e bound)) + |> List.fold Set.union Set.empty + +/// Collect variable names bound by a pattern +and collectPatternBindings (pattern: Pattern) : Set = + match pattern with + | PUnit -> Set.empty + | PWildcard -> Set.empty + | PVar name -> Set.singleton name + | PInt64 _ + | PInt128Literal _ + | PInt8Literal _ + | PInt16Literal _ + | PInt32Literal _ + | PUInt8Literal _ + | PUInt16Literal _ + | PUInt32Literal _ + | PUInt64Literal _ + | PUInt128Literal _ + | PBool _ + | PString _ + | PChar _ + | PFloat _ -> Set.empty + | PConstructor (_, None) -> Set.empty + | PConstructor (_, Some payload) -> collectPatternBindings payload + | PTuple patterns -> + patterns |> List.map collectPatternBindings |> List.fold Set.union Set.empty + | PRecord (_, fields) -> + fields |> List.map (fun (_, p) -> collectPatternBindings p) |> List.fold Set.union Set.empty + | PList patterns -> + patterns |> List.map collectPatternBindings |> List.fold Set.union Set.empty + | PListCons (headPatterns, tailPattern) -> + let headBindings = headPatterns |> List.map collectPatternBindings |> List.fold Set.union Set.empty + let tailBindings = collectPatternBindings tailPattern + Set.union headBindings tailBindings + +// ============================================================================= +// Type Inference for Generic Function Calls +// ============================================================================= +// When a generic function is called without explicit type arguments, we infer +// the type arguments from the actual argument types. For example: +// def identity(x: T) : T = x +// identity(42) // Infers T=int from argument type + +/// Match a pattern type against an actual type, extracting type variable bindings. +/// Returns a list of (typeVarName, concreteType) pairs. +/// Example: matchTypes (TVar "T") TInt64 = Ok [("T", TInt64)] +/// Helper for matching concrete types - also handles when actual is a TVar +let matchConcrete (expectedType: Type) (actual: Type) : Result<(string * Type) list, string> = + if expectedType = TRuntimeError || actual = TRuntimeError then + // Runtime-error expressions are bottom-like and can inhabit any expected type. + Ok [] + else + match actual with + | t when t = expectedType -> Ok [] + | TVar name -> Ok [(name, expectedType)] // Bind TVar to concrete type + | _ -> Error $"Expected {typeToString expectedType}, got {typeToString actual}" + +let rec matchTypes (pattern: Type) (actual: Type) : Result<(string * Type) list, string> = + match pattern with + | TVar name -> + // Type variable matches anything - record the binding + match actual with + | TVar actualName when actualName = name -> Ok [] // Same var, no binding needed + | _ -> Ok [(name, actual)] + | TInt8 -> matchConcrete TInt8 actual + | TInt16 -> matchConcrete TInt16 actual + | TInt32 -> matchConcrete TInt32 actual + | TInt64 -> matchConcrete TInt64 actual + | TInt128 -> matchConcrete TInt128 actual + | TUInt8 -> matchConcrete TUInt8 actual + | TUInt16 -> matchConcrete TUInt16 actual + | TUInt32 -> matchConcrete TUInt32 actual + | TUInt64 -> matchConcrete TUInt64 actual + | TUInt128 -> matchConcrete TUInt128 actual + | TBool -> matchConcrete TBool actual + | TFloat64 -> matchConcrete TFloat64 actual + | TString -> + // Char and String share runtime representation. + match actual with + | TChar -> Ok [] + | _ -> matchConcrete TString actual + | TBytes -> matchConcrete TBytes actual + | TChar -> + match actual with + | TString -> Ok [] + | _ -> matchConcrete TChar actual + | TUnit -> matchConcrete TUnit actual + | TRuntimeError -> matchConcrete TRuntimeError actual + | TRawPtr -> matchConcrete TRawPtr actual + | TList patternElem -> + match actual with + | TList actualElem -> matchTypes patternElem actualElem + | TVar name -> Ok [(name, pattern)] // Bind TVar to List type + | _ -> Error $"Expected List<...>, got {typeToString actual}" + | TRecord (name, patternArgs) -> + match actual with + | TRecord (n, actualArgs) when n = name -> + // Unify type arguments if both have them + if List.length patternArgs <> List.length actualArgs then + Error $"Record type arity mismatch for {name}" + else + List.zip patternArgs actualArgs + |> List.map (fun (p, a) -> matchTypes p a) + |> List.fold (fun acc res -> + match acc, res with + | Ok bindings, Ok newBindings -> Ok (bindings @ newBindings) + | Error e, _ -> Error e + | _, Error e -> Error e) (Ok []) + | TVar varName -> Ok [(varName, pattern)] // Bind TVar to Record type + | _ -> Error $"Expected {name}, got {typeToString actual}" + | TSum (name, patternArgs) -> + match actual with + | TSum (actualName, actualArgs) when name = actualName -> + if List.length patternArgs <> List.length actualArgs then + Error $"Sum type arity mismatch for {name}" + else + List.zip patternArgs actualArgs + |> List.map (fun (p, a) -> matchTypes p a) + |> List.fold (fun acc res -> + match acc, res with + | Ok bindings, Ok newBindings -> Ok (bindings @ newBindings) + | Error e, _ -> Error e + | _, Error e -> Error e) (Ok []) + | TVar varName -> Ok [(varName, pattern)] // Bind TVar to Sum type + | _ -> Error $"Expected {name}, got {typeToString actual}" + | TFunction (patternParams, patternRet) -> + match actual with + | TFunction (actualParams, actualRet) -> + if List.length patternParams <> List.length actualParams then + Error $"Function arity mismatch: expected {List.length patternParams} params, got {List.length actualParams}" + else + // Match each parameter type and return type + let paramResults = + List.zip patternParams actualParams + |> List.map (fun (p, a) -> matchTypes p a) + let retResult = matchTypes patternRet actualRet + // Combine all results + List.fold (fun acc res -> + match acc, res with + | Ok bindings, Ok newBindings -> Ok (bindings @ newBindings) + | Error e, _ -> Error e + | _, Error e -> Error e) retResult paramResults + | TVar varName -> Ok [(varName, pattern)] // Bind TVar to Function type + | _ -> Error $"Expected function, got {typeToString actual}" + | TTuple patternElems -> + match actual with + | TTuple actualElems -> + if List.length patternElems <> List.length actualElems then + Error $"Tuple size mismatch: expected {List.length patternElems}, got {List.length actualElems}" + else + List.zip patternElems actualElems + |> List.map (fun (p, a) -> matchTypes p a) + |> List.fold (fun acc res -> + match acc, res with + | Ok bindings, Ok newBindings -> Ok (bindings @ newBindings) + | Error e, _ -> Error e + | _, Error e -> Error e) (Ok []) + | TVar varName -> Ok [(varName, pattern)] // Bind TVar to Tuple type + | _ -> Error $"Expected tuple, got {typeToString actual}" + | TDict (patternKey, patternValue) -> + match actual with + | TDict (actualKey, actualValue) -> + // Match both key and value types + match matchTypes patternKey actualKey, matchTypes patternValue actualValue with + | Ok keyBindings, Ok valueBindings -> Ok (keyBindings @ valueBindings) + | Error e, _ -> Error e + | _, Error e -> Error e + | TVar varName -> Ok [(varName, pattern)] // Bind TVar to Dict type + | _ -> Error $"Expected Dict<...>, got {typeToString actual}" + +/// Check if a type contains type variables +let rec containsTVar (typ: Type) : bool = + match typ with + | TVar _ -> true + | TList elemType -> containsTVar elemType + | TDict (keyType, valueType) -> containsTVar keyType || containsTVar valueType + | TTuple elemTypes -> List.exists containsTVar elemTypes + | TRecord (_, typeArgs) -> List.exists containsTVar typeArgs + | TSum (_, typeArgs) -> List.exists containsTVar typeArgs + | TFunction (paramTypes, retType) -> + List.exists containsTVar paramTypes || containsTVar retType + | _ -> false + +/// Check if two types are compatible (can be unified) +/// Type variables in either type can match concrete types +let typesCompatible (expected: Type) (actual: Type) : bool = + match matchTypes expected actual with + | Ok _ -> true + | Error _ -> false + +/// Check if two types are compatible after resolving type aliases +/// Combines alias resolution with type variable unification +let typesCompatibleWithAliases (aliasReg: AliasRegistry) (expected: Type) (actual: Type) : bool = + let resolvedExpected = resolveType aliasReg expected + let resolvedActual = resolveType aliasReg actual + typesCompatible resolvedExpected resolvedActual + +/// Consolidate bindings, checking for conflicts where the same type variable +/// is bound to different types. Returns a map from type var name to concrete type. +/// When a type var is bound to both a type containing TVars and a concrete type, prefer the concrete type. +let consolidateBindings (bindings: (string * Type) list) : Result, string> = + bindings + |> List.fold (fun acc (name, typ) -> + acc |> Result.bind (fun m -> + match Map.tryFind name m with + | None -> Ok (Map.add name typ m) + | Some existingType -> + if existingType = typ then + Ok m + elif containsTVar existingType && not (containsTVar typ) then + // existing contains TVars, new is concrete - prefer new + Ok (Map.add name typ m) + elif containsTVar typ && not (containsTVar existingType) then + // new contains TVars, existing is concrete - keep existing + Ok m + elif containsTVar existingType && containsTVar typ then + // Both contain TVars - keep the first one (arbitrary choice) + Ok m + else + // Both are concrete but different - that's an error + Error $"Type variable {name} has conflicting inferences: {typeToString existingType} vs {typeToString typ}")) + (Ok Map.empty) + +/// Unify a type pattern (may contain TVar) with a concrete type. +/// Returns a substitution mapping type variables to concrete types. +/// Example: unifyTypes (TVar "t") TInt64 = Ok (Map.ofList [("t", TInt64)]) +let unifyTypes (pattern: Type) (actual: Type) : Result = + matchTypes pattern actual + |> Result.bind consolidateBindings + +/// Reconcile two types where one might contain type variables. +/// If one type is concrete and the other has type variables that can unify with it, +/// returns the concrete type. If both are concrete and equal, returns the type. +/// If both are concrete and different, returns None. +/// The optional aliasReg parameter allows type alias resolution before comparison. +let reconcileTypes (aliasReg: AliasRegistry option) (t1: Type) (t2: Type) : Type option = + // Resolve type aliases if registry is provided + let t1' = aliasReg |> Option.map (fun reg -> resolveType reg t1) |> Option.defaultValue t1 + let t2' = aliasReg |> Option.map (fun reg -> resolveType reg t2) |> Option.defaultValue t2 + + if t1' = t2' then + Some t1' + elif t1' = TRuntimeError then + Some t2' + elif t2' = TRuntimeError then + Some t1' + elif t1' = TString && t2' = TChar then + Some TString + elif t1' = TChar && t2' = TString then + Some TChar + elif containsTVar t1' && not (containsTVar t2') then + // t2 is concrete, check if t1 can unify with it + match unifyTypes t1' t2' with + | Ok _ -> Some t2' // Return the concrete type + | Error _ -> None + elif not (containsTVar t1') && containsTVar t2' then + // t1 is concrete, check if t2 can unify with it + match unifyTypes t2' t1' with + | Ok _ -> Some t1' // Return the concrete type + | Error _ -> None + elif containsTVar t1' && containsTVar t2' then + // Both have type variables - try to unify + match unifyTypes t1' t2' with + | Ok subst -> Some (applySubst subst t1') + | Error _ -> None + else + None + +/// Infer type arguments for a generic function call. +/// Given type parameters, parameter types (with type variables), and actual argument types, +/// returns the inferred type arguments in order matching typeParams. +/// Also takes optional function return type and expected return type for additional inference. +let inferTypeArgs (typeParams: string list) (paramTypes: Type list) (argTypes: Type list) (returnType: Type option) (expectedReturnType: Type option) : Result = + if List.length paramTypes <> List.length argTypes then + Error $"Argument count mismatch: expected {List.length paramTypes}, got {List.length argTypes}" + else + // Match each parameter type against argument type + let argMatchResults = + List.zip paramTypes argTypes + |> List.map (fun (paramT, argT) -> matchTypes paramT argT) + + // Also match return type against expected return type if both are provided + let returnMatchResult = + match returnType, expectedReturnType with + | Some retT, Some expT -> matchTypes retT expT + | _ -> Ok [] + + // Combine all bindings + (argMatchResults @ [returnMatchResult]) + |> List.fold (fun acc res -> + match acc, res with + | Ok bindings, Ok newBindings -> Ok (bindings @ newBindings) + | Error e, _ -> Error e + | _, Error e -> Error e) (Ok []) + |> Result.bind consolidateBindings + |> Result.bind (fun bindingMap -> + // Extract type arguments in order of type parameters, preserving unresolved type vars. + typeParams + |> List.fold (fun acc paramName -> + acc |> Result.bind (fun args -> + match Map.tryFind paramName bindingMap with + | Some typ -> Ok (args @ [typ]) + | None -> Ok (args @ [TVar paramName]))) + (Ok [])) + +/// Try to look up a function name in a map, with fallback to Stdlib prefix +/// Returns the value and the resolved name (which may differ from input) +let tryLookupWithFallback (name: string) (m: Map) : ('a * string) option = + let withStdlibPrefix (candidate: string) : string option = + if candidate.Contains(".") && not (candidate.StartsWith("Stdlib.")) then + Some ("Stdlib." + candidate) + else + None + + let withoutV0Suffix (candidate: string) : string option = + if candidate.EndsWith("_v0") then + Some (candidate.Substring(0, candidate.Length - 3)) + else + None + + let candidates = + [ + Some name + withoutV0Suffix name + withStdlibPrefix name + (withStdlibPrefix name |> Option.bind withoutV0Suffix) + ] + |> List.choose id + |> List.distinct + + candidates + |> List.tryPick (fun candidate -> + match Map.tryFind candidate m with + | Some v -> Some (v, candidate) + | None -> None) + +let private paramNameForLegacyError + (funcParamNameReg: Map) + (funcName: string) + (paramIndex: int) + : string = + let zeroBasedParamIndex = paramIndex - 1 + + let rec tryGetAtIndex (index: int) (remaining: string list) : string option = + match remaining with + | [] -> None + | item :: rest -> + if index = 0 then Some item else tryGetAtIndex (index - 1) rest + + let resolvedParamName = + if zeroBasedParamIndex < 0 then + None + else + tryLookupWithFallback funcName funcParamNameReg + |> Option.bind (fun (paramNames, _resolvedName) -> tryGetAtIndex zeroBasedParamIndex paramNames) + + match resolvedParamName with + | Some paramName -> paramName + | None -> $"arg{paramIndex}" + +/// Check expression type top-down, potentially transforming the expression. +/// Parameters: +/// - expr: Expression to type-check +/// - env: Type environment (variable name -> type mappings) +/// - typeReg: Type registry (record type name -> field definitions) +/// - variantLookup: Maps variant names to (type name, tag index) +/// - genericFuncReg: Registry of generic functions (function name -> type params) +/// - expectedType: Optional expected type from context (for checking) +/// Returns: Result +/// - Type: The type of the expression +/// - Expr: The (possibly transformed) expression +let rec checkExprWithParamNames + (funcParamNameReg: Map) + (expr: Expr) + (env: TypeEnv) + (typeReg: TypeRegistry) + (variantLookup: VariantLookup) + (genericFuncReg: GenericFuncRegistry) + (warningSettings: WarningSettings) + (moduleRegistry: ModuleRegistry) + (aliasReg: AliasRegistry) + (expectedType: Type option) + : Result = + let checkExpr + (innerExpr: Expr) + (innerEnv: TypeEnv) + (innerTypeReg: TypeRegistry) + (innerVariantLookup: VariantLookup) + (innerGenericFuncReg: GenericFuncRegistry) + (innerWarningSettings: WarningSettings) + (innerModuleRegistry: ModuleRegistry) + (innerAliasReg: AliasRegistry) + (innerExpectedType: Type option) + : Result = + checkExprWithParamNames + funcParamNameReg + innerExpr + innerEnv + innerTypeReg + innerVariantLookup + innerGenericFuncReg + innerWarningSettings + innerModuleRegistry + innerAliasReg + innerExpectedType + + match expr with + | UnitLiteral -> + // Unit literal is always TUnit + match expectedType with + | Some expected when not (typesCompatible expected TUnit) -> + Error (TypeMismatch (expected, TUnit, "unit literal")) + | _ -> Ok (TUnit, expr) + + | Int64Literal _ -> + match expectedType with + | Some TInt64 | None -> Ok (TInt64, expr) + | Some other -> + // Handle type variables (e.g., when expected is TVar "t") + match reconcileTypes (Some aliasReg) other TInt64 with + | Some TInt64 -> Ok (TInt64, expr) + | _ -> Error (TypeMismatch (other, TInt64, "integer literal")) + + | Int128Literal _ -> + match expectedType with + | Some TInt128 | None -> Ok (TInt128, expr) + | Some other -> + match reconcileTypes (Some aliasReg) other TInt128 with + | Some TInt128 -> Ok (TInt128, expr) + | _ -> Error (TypeMismatch (other, TInt128, "integer literal")) + + | Int8Literal _ -> + match expectedType with + | Some expected when not (typesCompatible expected TInt8) -> + Error (TypeMismatch (expected, TInt8, "Int8 literal")) + | _ -> Ok (TInt8, expr) + + | Int16Literal _ -> + match expectedType with + | Some expected when not (typesCompatible expected TInt16) -> + Error (TypeMismatch (expected, TInt16, "Int16 literal")) + | _ -> Ok (TInt16, expr) + + | Int32Literal _ -> + match expectedType with + | Some expected when not (typesCompatible expected TInt32) -> + Error (TypeMismatch (expected, TInt32, "Int32 literal")) + | _ -> Ok (TInt32, expr) + + | UInt8Literal _ -> + match expectedType with + | Some expected when not (typesCompatible expected TUInt8) -> + Error (TypeMismatch (expected, TUInt8, "UInt8 literal")) + | _ -> Ok (TUInt8, expr) + + | UInt16Literal _ -> + match expectedType with + | Some expected when not (typesCompatible expected TUInt16) -> + Error (TypeMismatch (expected, TUInt16, "UInt16 literal")) + | _ -> Ok (TUInt16, expr) + + | UInt32Literal _ -> + match expectedType with + | Some expected when not (typesCompatible expected TUInt32) -> + Error (TypeMismatch (expected, TUInt32, "UInt32 literal")) + | _ -> Ok (TUInt32, expr) + + | UInt64Literal _ -> + match expectedType with + | Some expected when not (typesCompatible expected TUInt64) -> + Error (TypeMismatch (expected, TUInt64, "UInt64 literal")) + | _ -> Ok (TUInt64, expr) + + | UInt128Literal _ -> + match expectedType with + | Some expected when not (typesCompatible expected TUInt128) -> + Error (TypeMismatch (expected, TUInt128, "UInt128 literal")) + | _ -> Ok (TUInt128, expr) + + | BoolLiteral _ -> + // Boolean literals are always TBool + match expectedType with + | Some expected when not (typesCompatible expected TBool) -> + Error (TypeMismatch (expected, TBool, "boolean literal")) + | _ -> Ok (TBool, expr) + + | StringLiteral _ -> + // String literals are always TString + match expectedType with + | Some expected when not (typesCompatibleWithAliases aliasReg expected TString) -> + Error (TypeMismatch (expected, TString, "string literal")) + | _ -> Ok (TString, expr) + + | CharLiteral _ -> + // Char literals are always TChar (single Extended Grapheme Cluster) + match expectedType with + | Some expected when not (typesCompatible expected TChar) -> + Error (TypeMismatch (expected, TChar, "char literal")) + | _ -> Ok (TChar, expr) + + | InterpolatedString parts -> + // Interpolated strings are always TString + // Check that all expression parts are strings + let rec checkParts (parts: StringPart list) (checkedParts: StringPart list) : Result = + match parts with + | [] -> Ok (List.rev checkedParts) + | StringText s :: rest -> + checkParts rest (StringText s :: checkedParts) + | StringExpr e :: rest -> + let checkedPartResult = + checkExpr e env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some TString) + let normalizedPartResult = + match checkedPartResult with + | Error (UndefinedVariable name) -> + Error (UndefinedCallTarget name) + | Error (TypeMismatch (expected, _, _)) when expected = TString -> + checkExpr e env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg None + |> Result.mapError (fun innerErr -> + match innerErr with + | UndefinedVariable name -> UndefinedCallTarget name + | _ -> innerErr) + |> Result.bind (fun (actualType, checkedExpr) -> + Error (GenericError (interpolationTypeMismatchMessage checkedExpr actualType))) + | _ -> + checkedPartResult + normalizedPartResult + |> Result.bind (fun (partType, checkedExpr) -> + if partType = TString || partType = TChar then + checkParts rest (StringExpr checkedExpr :: checkedParts) + else + Error (GenericError (interpolationTypeMismatchMessage checkedExpr partType))) + match checkParts parts [] with + | Ok checkedParts -> + match expectedType with + | Some TString | None -> Ok (TString, InterpolatedString checkedParts) + | Some other -> Error (TypeMismatch (other, TString, "interpolated string")) + | Error err -> Error err + + | FloatLiteral _ -> + // Float literals are always TFloat64 + match expectedType with + | Some expected when not (typesCompatible expected TFloat64) -> + Error (TypeMismatch (expected, TFloat64, "float literal")) + | _ -> Ok (TFloat64, expr) + + | BinOp (op, left, right) -> + match op with + // Arithmetic operators: T -> T -> T (where T is int or float) + | Add | Sub | Mul | Div | Mod -> + let opName = + match op with + | Add -> "+" + | Sub -> "-" + | Mul -> "*" + | Div -> "/" + | Mod -> "%" + | _ -> "?" + + let tryAsNumericType (typ: Type) : Type option = + match resolveType aliasReg typ with + | TInt8 | TInt16 | TInt32 | TInt64 + | TUInt8 | TUInt16 | TUInt32 | TUInt64 + | TFloat64 as numeric -> + Some numeric + | _ -> + None + + match tryExtractKnownTestRuntimeErrorMessage Map.empty left with + | Some msg -> + Error (GenericError $"Uncaught exception: {msg}") + | None -> + // Check left operand to determine numeric type + checkExpr left env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg None + |> Result.bind (fun (leftType, left') -> + match tryAsNumericType leftType with + | Some leftNumericType -> + // Right operand must be same type + checkExpr right env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some leftNumericType) + |> Result.mapError (fun err -> + match op, leftNumericType, err with + | Add, TInt64, TypeMismatch (_, actualType, _) when not (isRuntimeErrorType actualType) -> + GenericError + (formatLegacyParamTypeError + "Builtin.int64Add" + 2 + "b" + TInt64 + actualType + right) + | Mul, TInt64, TypeMismatch (_, actualType, _) when not (isRuntimeErrorType actualType) -> + GenericError + (formatLegacyParamTypeError + "Builtin.int64Multiply" + 2 + "b" + TInt64 + actualType + right) + | _ -> + err) + |> Result.bind (fun (rightType, right') -> + if rightType <> leftNumericType then + Error (TypeMismatch (leftNumericType, rightType, $"right operand of {opName}")) + else + match expectedType with + | Some expected when expected <> leftNumericType -> + Error (TypeMismatch (expected, leftNumericType, $"result of {opName}")) + | _ -> Ok (leftNumericType, BinOp (op, left', right'))) + | None -> + match leftType with + | TVar _ -> + let rightExpectedType = + match expectedType with + | Some expected -> + match tryAsNumericType expected with + | Some numericExpected -> Some numericExpected + | None -> None + | None -> + None + checkExpr right env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg rightExpectedType + |> Result.bind (fun (rightType, right') -> + let inferredNumericType = + match rightExpectedType with + | Some numericExpected -> + Some numericExpected + | None -> + tryAsNumericType rightType + match inferredNumericType with + | Some numericType -> + match expectedType with + | Some expected when not (typesCompatible expected numericType) -> + Error (TypeMismatch (expected, numericType, $"result of {opName}")) + | _ -> + Ok (numericType, BinOp (op, left', right')) + | None -> + Error (InvalidOperation (opName, [leftType]))) + | other -> + Error (InvalidOperation (opName, [other]))) + + // Comparison operators: T -> T -> bool + // Eq and Neq: work on any type (structural equality for complex types) + // Lt, Gt, Lte, Gte: only work on numeric types + | Eq | Neq | Lt | Gt | Lte | Gte -> + let opName = + match op with + | Eq -> "==" + | Neq -> "!=" + | Lt -> "<" + | Gt -> ">" + | Lte -> "<=" + | Gte -> ">=" + | _ -> "?" + + let lambdaLiteralFastPath : Result option = + match (op, left, right) with + | Eq, Lambda (leftParams, _), Lambda (rightParams, _) + | Neq, Lambda (leftParams, _), Lambda (rightParams, _) -> + if NonEmptyList.length leftParams <> NonEmptyList.length rightParams then + None + else + let comparisonResult = if op = Eq then true else false + match expectedType with + | Some TBool | None -> + Some (Ok (TBool, BoolLiteral comparisonResult)) + | Some other -> + Some (Error (TypeMismatch (other, TBool, $"result of {opName}"))) + | _ -> + None + + match lambdaLiteralFastPath with + | Some result -> + result + | None -> + // Check left operand to determine type + checkExpr left env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg None + |> Result.bind (fun (leftType, left') -> + match op with + | Eq | Neq -> + // Equality works on any type - both operands must be same type + checkExpr right env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some leftType) + |> Result.bind (fun (rightType, right') -> + // In generic contexts, one side can still contain type variables + // while the other side has become concrete. + match reconcileTypes (Some aliasReg) leftType rightType with + | None -> + Error (TypeMismatch (leftType, rightType, $"right operand of {opName}")) + | Some comparableType -> + let eqExpr = buildEqExprForType aliasReg variantLookup comparableType left' right' + let comparisonExpr = + if op = Neq then + UnaryOp (Not, eqExpr) + else + eqExpr + match expectedType with + | Some TBool | None -> Ok (TBool, comparisonExpr) + | Some other -> Error (TypeMismatch (other, TBool, $"result of {opName}"))) + | Lt | Gt | Lte | Gte -> + // Ordering only works on numeric types. + // Allow unresolved type variables here so guards like + // `match Error 5 with | Ok x when x > 2 -> ...` can infer x as Int64. + checkExpr right env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some leftType) + |> Result.bind (fun (rightType, right') -> + match reconcileTypes (Some aliasReg) leftType rightType with + | None -> + Error (TypeMismatch (leftType, rightType, $"right operand of {opName}")) + | Some comparableType -> + match comparableType with + | TInt8 | TInt16 | TInt32 | TInt64 + | TUInt8 | TUInt16 | TUInt32 | TUInt64 + | TFloat64 -> + match expectedType with + | Some TBool | None -> Ok (TBool, BinOp (op, left', right')) + | Some other -> Error (TypeMismatch (other, TBool, $"result of {opName}")) + | other -> + Error (InvalidOperation (opName, [other]))) + | _ -> + Error (GenericError $"Unexpected comparison operator: {opName}")) + + // Boolean operators: bool -> bool -> bool + | And | Or -> + let opName = if op = And then "&&" else "||" + + let checkBooleanOperand (operand: Expr) : Result = + let checkedOperandResult = + match op with + | And -> + checkExpr operand env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some TBool) + | Or -> + checkExpr operand env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg None + | _ -> + checkExpr operand env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg None + match checkedOperandResult with + | Ok (operandType, operand') when operandType = TBool -> + Ok operand' + | Ok _ -> + Error (GenericError $"{opName} only supports Booleans") + | Error (TypeMismatch (expected, _, _)) when op = And && expected = TBool -> + Error (GenericError $"{opName} only supports Booleans") + | Error err -> + Error err + + match (op, tryExtractKnownTestRuntimeErrorMessage Map.empty left) with + | And, Some msg -> + Error (GenericError msg) + | _ -> + checkBooleanOperand left + |> Result.bind (fun left' -> + let rightIsKnownRuntimeError = isKnownTestRuntimeErrorExpr Map.empty right + let shortCircuitResult = + match (op, left', rightIsKnownRuntimeError) with + | (And, BoolLiteral false, true) -> Some false + | (Or, BoolLiteral true, true) -> Some true + | _ -> None + match shortCircuitResult with + | Some result -> + match expectedType with + | Some TBool | None -> Ok (TBool, BoolLiteral result) + | Some other -> Error (TypeMismatch (other, TBool, $"result of {opName}")) + | None -> + match (op, tryExtractKnownTestRuntimeErrorMessage Map.empty right) with + | And, Some msg -> + Error (GenericError msg) + | _ -> + checkBooleanOperand right + |> Result.bind (fun right' -> + match expectedType with + | Some TBool | None -> Ok (TBool, BinOp (op, left', right')) + | Some other -> Error (TypeMismatch (other, TBool, $"result of {opName}")))) + + // Bitwise operators: Int -> Int -> Int (same integer type) + | Shl | Shr | BitAnd | BitOr | BitXor -> + let opName = + match op with + | Shl -> "<<" + | Shr -> ">>" + | BitAnd -> "&" + | BitOr -> "|" + | BitXor -> "^" + | _ -> "?" + + let isIntegerType (typ: Type) = + match typ with + | TInt8 | TInt16 | TInt32 | TInt64 + | TUInt8 | TUInt16 | TUInt32 | TUInt64 -> true + | _ -> false + + checkExpr left env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg None + |> Result.bind (fun (leftType, left') -> + if not (isIntegerType leftType) then + Error (InvalidOperation (opName, [leftType])) + else + checkExpr right env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some leftType) + |> Result.bind (fun (rightType, right') -> + if rightType <> leftType then + Error (TypeMismatch (leftType, rightType, $"right operand of {opName}")) + else + match expectedType with + | Some expected when expected <> leftType -> + Error (TypeMismatch (expected, leftType, $"result of {opName}")) + | _ -> Ok (leftType, BinOp (op, left', right')))) + + // String concatenation: string -> string -> string + | StringConcat -> + match tryExtractKnownTestRuntimeErrorMessage Map.empty left with + | Some msg -> + Error (GenericError $"Uncaught exception: {msg}") + | None -> + checkExpr left env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some TString) + |> Result.bind (fun (leftType, left') -> + let isStringLike t = t = TString || t = TChar + if not (isStringLike leftType) then + Error (InvalidOperation ("++", [leftType])) + else + match tryExtractKnownTestRuntimeErrorMessage Map.empty right with + | Some msg -> + Error (GenericError $"Uncaught exception: {msg}") + | None -> + checkExpr right env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some TString) + |> Result.bind (fun (rightType, right') -> + if not (isStringLike rightType) then + Error (TypeMismatch (TString, rightType, "right operand of ++")) + else + match expectedType with + | Some TString | None -> Ok (TString, BinOp (op, left', right')) + | Some other -> Error (TypeMismatch (other, TString, "result of ++")))) + + | UnaryOp (op, inner) -> + match op with + | Neg -> + // Negation works on integer and float numeric types + checkExpr inner env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg None + |> Result.bind (fun (innerType, inner') -> + match innerType with + | TInt8 | TInt16 | TInt32 | TInt64 + | TUInt8 | TUInt16 | TUInt32 | TUInt64 + | TFloat64 -> + match expectedType with + | Some expected when expected <> innerType -> + Error (TypeMismatch (expected, innerType, "result of negation")) + | _ -> Ok (innerType, UnaryOp (op, inner')) + | other -> + Error (InvalidOperation ("-", [other]))) + + | Not -> + // Boolean not works on booleans and returns booleans + checkExpr inner env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some TBool) + |> Result.bind (fun (innerType, inner') -> + if innerType <> TBool then + Error (TypeMismatch (TBool, innerType, "operand of !")) + else + match expectedType with + | Some TBool | None -> Ok (TBool, UnaryOp (op, inner')) + | Some other -> Error (TypeMismatch (other, TBool, "result of !"))) + + | BitNot -> + // Bitwise NOT works on integer types and preserves the operand type + let isIntegerType (typ: Type) = + match typ with + | TInt8 | TInt16 | TInt32 | TInt64 + | TUInt8 | TUInt16 | TUInt32 | TUInt64 -> true + | _ -> false + + checkExpr inner env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg None + |> Result.bind (fun (innerType, inner') -> + if not (isIntegerType innerType) then + Error (InvalidOperation ("~~~", [innerType])) + else + match expectedType with + | Some expected when expected <> innerType -> + Error (TypeMismatch (expected, innerType, "result of ~~~")) + | _ -> Ok (innerType, UnaryOp (op, inner'))) + + | Let (name, value, body) -> + // Let binding: check value, extend environment, check body + let valueExpectedType = + match value with + | ListLiteral [] -> Some (TList (TVar "t")) + | _ -> None + + checkExpr value env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg valueExpectedType + |> Result.bind (fun (valueType, value') -> + let env' = Map.add name valueType env + checkExpr body env' typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg expectedType + |> Result.map (fun (bodyType, body') -> (bodyType, Let (name, value', body')))) + + | Var name -> + if isBuiltinTestNanName name then + let builtinExpr = Var "Builtin.testNan" + match expectedType with + | Some expected -> + match reconcileTypes (Some aliasReg) expected TFloat64 with + | Some reconciledType -> Ok (reconciledType, builtinExpr) + | None -> Error (TypeMismatch (expected, TFloat64, $"variable {name}")) + | None -> Ok (TFloat64, builtinExpr) + else + // Variable reference: look up in environment + match tryLookupWithFallback name env with + | Some (varType, resolvedName) -> + match expectedType with + | Some expected -> + // Legacy upstream compatibility: a nullary function used in a + // value position should evaluate to its return value. + let nullaryAutoCallResult = + match varType with + | TFunction ([TUnit], returnType) + | TFunction ([], returnType) -> + match reconcileTypes (Some aliasReg) expected returnType with + | Some reconciledType -> + let autoCallExpr = + if resolvedName.Contains(".") then + Call (resolvedName, NonEmptyList.singleton UnitLiteral) + else + Apply (Var resolvedName, NonEmptyList.singleton UnitLiteral) + Some (Ok (reconciledType, autoCallExpr)) + | None -> + None + | _ -> + None + + match nullaryAutoCallResult with + | Some result -> + result + | None -> + // Use reconcileTypes to handle type variables and type aliases + match reconcileTypes (Some aliasReg) expected varType with + | Some reconciledType -> Ok (reconciledType, Var resolvedName) + | None -> Error (TypeMismatch (expected, varType, $"variable {name}")) + | None -> Ok (varType, Var resolvedName) + | None -> + // Check if it's a module function (e.g., Stdlib.Int64.add) + let moduleRegistry = Stdlib.buildModuleRegistry () + match Stdlib.tryGetFunctionWithFallback moduleRegistry name with + | Some (moduleFunc, resolvedName) -> + let funcType = Stdlib.getFunctionType moduleFunc + match expectedType with + | Some expected -> + let nullaryAutoCallResult = + match funcType with + | TFunction ([TUnit], returnType) + | TFunction ([], returnType) -> + match reconcileTypes (Some aliasReg) expected returnType with + | Some reconciledType -> + Some (Ok (reconciledType, Call (resolvedName, NonEmptyList.singleton UnitLiteral))) + | None -> + None + | _ -> + None + + match nullaryAutoCallResult with + | Some result -> + result + | None -> + match reconcileTypes (Some aliasReg) expected funcType with + | Some reconciledType -> Ok (reconciledType, Var resolvedName) + | None -> Error (TypeMismatch (expected, funcType, $"variable {name}")) + | None -> Ok (funcType, Var resolvedName) + | None -> + Error (UndefinedVariable name) + + | If (cond, thenBranch, elseBranch) -> + // If expression: condition must be bool, branches must have same type + checkExpr cond env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg None + |> Result.bind (fun (condType, cond') -> + let normalizedConditionResult : Result = + if condType = TBool then + Ok cond' + else + let conditionIsKnownFailure = + isKnownUnwrapFailureExpr Map.empty cond + || isKnownUnwrapFailureExpr Map.empty cond' + || isKnownTestRuntimeErrorExpr Map.empty cond + || isKnownTestRuntimeErrorExpr Map.empty cond' + + if conditionIsKnownFailure then + checkExpr cond env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some TBool) + |> Result.bind (fun (resolvedCondType, resolvedCondExpr) -> + if resolvedCondType = TBool then + Ok resolvedCondExpr + else + Error (GenericError (ifConditionTypeMismatchMessage resolvedCondExpr resolvedCondType))) + else + Error (GenericError (ifConditionTypeMismatchMessage cond' condType)) + + normalizedConditionResult + |> Result.bind (fun normalizedCond -> + checkExpr thenBranch env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg expectedType + |> Result.bind (fun (thenType, then') -> + let elseExpectedType = + // If an outer context already provides an expected type, keep using it. + // Otherwise, use the then-branch type to type-check the else-branch. + // This lets bottom-like runtime-failing expressions (e.g. unwrap None) + // inhabit the enclosing branch type. + match expectedType with + | Some outerExpected -> Some outerExpected + | None -> Some thenType + + let elseResult = + match checkExpr elseBranch env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg elseExpectedType with + | Ok checkedElse -> + Ok checkedElse + | Error originalErr -> + // When no outer expected type exists, we type-check else with then-type context. + // If that fails due to contextual mismatch, re-check else unconstrained so the + // final diagnostic can report branch-vs-branch mismatch, not literal mismatch. + match expectedType, originalErr with + | None, TypeMismatch (expectedElse, _, _) when expectedElse = thenType -> + checkExpr elseBranch env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg None + | _ -> + Error originalErr + + elseResult + |> Result.bind (fun (elseType, else') -> + let reconciledBranchType = + match reconcileTypes (Some aliasReg) thenType elseType with + | Some reconciledType -> + Some reconciledType + | None -> + let thenIsKnownFailure = + isKnownUnwrapFailureExpr Map.empty thenBranch + || isKnownUnwrapFailureExpr Map.empty then' + + let elseIsKnownFailure = + isKnownUnwrapFailureExpr Map.empty elseBranch + || isKnownUnwrapFailureExpr Map.empty else' + + if thenIsKnownFailure && not elseIsKnownFailure then + Some elseType + elif elseIsKnownFailure && not thenIsKnownFailure then + Some thenType + else + None + + match reconciledBranchType with + | None -> + Error (IfBranchTypeMismatch (thenType, elseType)) + | Some reconciledType -> + match expectedType with + | Some expected -> + match reconcileTypes (Some aliasReg) expected reconciledType with + | Some reconciledExpected -> Ok (reconciledExpected, If (normalizedCond, then', else')) + | None -> Error (TypeMismatch (expected, reconciledType, "if expression")) + | _ -> Ok (reconciledType, If (normalizedCond, then', else')))))) + + | Call (funcName, args) -> + // Function call: look up function signature, check arguments match + // Use fallback to resolve short names like Option.isSome to Stdlib.Option.isSome + let args = NonEmptyList.toList args + if isBuiltinUnwrapName funcName then + match args with + | [argExpr] -> + checkExpr argExpr env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg None + |> Result.bind (fun (argType, argExpr') -> + let unwrapTypeResult = + match resolveType aliasReg argType with + | TSum ("Stdlib.Option.Option", [valueType]) -> Ok valueType + | TSum ("Stdlib.Result.Result", [okType; _]) -> Ok okType + | actualType -> + Error (GenericError $"Can only unwrap Options and Results, yet got {typeToString actualType}") + + unwrapTypeResult + |> Result.bind (fun outputType -> + // `Option.None |> Builtin.unwrap` and `Result.Error(_) |> Builtin.unwrap` + // are guaranteed runtime failures. When unconstrained, their payload type + // remains a type variable; normalize to Unit to keep IR monomorphic. + let normalizedOutputType = + if isKnownFailureConstructorExpr argExpr' then + match expectedType with + // Bottom-like behavior: if context expects a type, use it. + | Some expected -> expected + // Unconstrained top-level failures still need a concrete type. + | None when containsTVar outputType -> TUnit + | None -> outputType + else + outputType + + match expectedType with + | Some expected -> + match reconcileTypes (Some aliasReg) expected normalizedOutputType with + | Some reconciledType -> + Ok (reconciledType, Call ("Builtin.unwrap", NonEmptyList.singleton argExpr')) + | None -> + Error (TypeMismatch (expected, normalizedOutputType, $"result of call to {funcName}")) + | None -> + Ok (normalizedOutputType, Call ("Builtin.unwrap", NonEmptyList.singleton argExpr')))) + | _ -> + Error (GenericError $"Function {funcName} expects 1 arguments, got {List.length args}") + elif isBuiltinTestRuntimeErrorName funcName then + match args with + | [argExpr] -> + checkExpr argExpr env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some TString) + |> Result.bind (fun (_argType, argExpr') -> + let outputType = + match expectedType with + | Some expected -> expected + | None -> TRuntimeError + Ok (outputType, Call ("Builtin.testRuntimeError", NonEmptyList.singleton argExpr'))) + | _ -> + Error (GenericError $"Function {funcName} expects 1 arguments, got {List.length args}") + else + match tryLookupWithFallback funcName env with + | Some (TFunction (origParamTypes, origReturnType), resolvedFuncName) -> + ( + // Check if this is a generic function. + match tryLookupWithFallback resolvedFuncName genericFuncReg.Functions with + | Some (origTypeParams, _) when + genericFuncReg.RequireExplicitTypeArgsForBareCalls + && Option.isNone expectedType + && not (resolvedFuncName.Contains(".")) -> + // Bare user-defined generic calls must provide explicit type arguments. + // Module-scoped names (for example Stdlib.List.map) still infer type args. + let expectedTypeArgCount = List.length origTypeParams + Error (GenericError (formatTypeArgumentArityError funcName expectedTypeArgCount 0)) + | Some (origTypeParams, _) -> + // Freshen type params to avoid name clashes with caller's scope + let (freshTypeParams, renaming) = freshenTypeParams origTypeParams + let paramTypes = origParamTypes |> List.map (applyTypeVarRenaming renaming) + let returnType = applyTypeVarRenaming renaming origReturnType + let typeParams = freshTypeParams + // Generic function called without explicit type args: infer them + let numParams = List.length paramTypes + let args = normalizeNullaryCallArgs numParams args + let numArgs = List.length args + + if numArgs > numParams then + Error (GenericError (formatValueArgumentArityError funcName numParams numArgs)) + else if numArgs < numParams then + // Partial application of generic function + let providedParamTypes = List.take numArgs paramTypes + let remainingParamTypes = List.skip numArgs paramTypes + + // Type-check the provided arguments + let rec checkProvidedArgs remaining paramTys accTypes accExprs = + match remaining, paramTys with + | [], [] -> Ok (List.rev accTypes, List.rev accExprs) + | arg :: restArgs, paramT :: restParams -> + checkExpr arg env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some paramT) + |> Result.bind (fun (argType, arg') -> + checkProvidedArgs restArgs restParams (argType :: accTypes) (arg' :: accExprs)) + | _ -> Error (GenericError "Internal error: argument/param length mismatch") + + checkProvidedArgs args providedParamTypes [] [] + |> Result.bind (fun (argTypes, args') -> + // Infer type arguments from provided args (some may remain as TVar) + inferTypeArgs typeParams providedParamTypes argTypes (Some returnType) None + |> Result.mapError GenericError + |> Result.bind (fun inferredTypeArgs -> + // Build substitution and compute concrete types for remaining params + buildSubstitution typeParams inferredTypeArgs + |> Result.mapError GenericError + |> Result.bind (fun subst -> + let concreteRemainingParamTypes = List.map (applySubst subst) remainingParamTypes + let concreteReturnType = applySubst subst returnType + let concreteArgs = List.map (applySubstToExpr subst) args' + + // Create unique parameter names for the remaining parameters + let remainingParams = makePartialParams resolvedFuncName concreteRemainingParamTypes + + // Create the lambda body: TypeApp with all args + let allArgs = concreteArgs @ (remainingParams |> List.map (fun (name, _) -> Var name)) + let lambdaBody = TypeApp (resolvedFuncName, inferredTypeArgs, toCallArgs allArgs) + + // Create the lambda: (p0, p1, ...) => funcName(providedArgs, p0, p1, ...) + let lambdaExpr = Lambda (toLambdaParams remainingParams, lambdaBody) + + // The resulting type is a function from remaining params to return type + let partialType = TFunction (concreteRemainingParamTypes, concreteReturnType) + + match expectedType with + | Some expected when not (typesCompatible expected partialType) -> + Error (TypeMismatch (expected, partialType, $"partial application of {funcName}")) + | _ -> Ok (partialType, lambdaExpr)))) + else + // Full application - type-check arguments left-to-right while propagating bindings. + let rec checkArgsWithBindings remaining remainingParamTypes accTypes accExprs accBindings = + match remaining, remainingParamTypes with + | [], [] -> + Ok (List.rev accTypes, List.rev accExprs) + | arg :: restArgs, paramT :: restParams -> + consolidateBindings accBindings + |> Result.mapError GenericError + |> Result.bind (fun bindingMap -> + let concreteParamType = applySubst bindingMap paramT + checkExpr + arg + env + typeReg + variantLookup + genericFuncReg + warningSettings + moduleRegistry + aliasReg + (Some concreteParamType) + |> Result.bind (fun (argType, arg') -> + match matchTypes concreteParamType argType with + | Ok newBindings -> + let combinedBindings = accBindings @ newBindings + consolidateBindings combinedBindings + |> Result.mapError GenericError + |> Result.bind (fun combinedBindingMap -> + let concreteArgType = applySubst combinedBindingMap argType + checkArgsWithBindings + restArgs + restParams + (concreteArgType :: accTypes) + (arg' :: accExprs) + combinedBindings) + | Error msg -> + Error (TypeMismatch (concreteParamType, argType, $"argument to {funcName}: {msg}"))) + ) + | _ -> + Error (GenericError "Argument count mismatch") + + checkArgsWithBindings args paramTypes [] [] [] + |> Result.bind (fun (argTypes, args') -> + // Infer type arguments from parameter types, argument types, and expected return type + inferTypeArgs typeParams paramTypes argTypes (Some returnType) expectedType + |> Result.mapError GenericError + |> Result.bind (fun inferredTypeArgs -> + // Build substitution and compute concrete types + buildSubstitution typeParams inferredTypeArgs + |> Result.mapError GenericError + |> Result.bind (fun subst -> + let concreteReturnType = applySubst subst returnType + // Apply substitution to nested expressions (e.g., inner TypeApp nodes) + // This ensures that when empty() returns Dict and we later + // infer k$3 -> Int64, v$4 -> Int64, the inner TypeApp gets updated + let concreteArgs = List.map (applySubstToExpr subst) args' + match expectedType with + | Some expected when not (typesCompatible expected concreteReturnType) -> + Error (TypeMismatch (expected, concreteReturnType, $"result of call to {funcName}")) + | _ -> + // Transform Call to TypeApp with inferred type arguments (using resolved name) + Ok ( + concreteReturnType, + TypeApp (resolvedFuncName, inferredTypeArgs, toCallArgs concreteArgs) + )))) + + | None -> + // Non-generic function: regular call or partial application + let numParams = List.length origParamTypes + let args = normalizeNullaryCallArgs numParams args + let numArgs = List.length args + if numArgs > numParams then + Error (GenericError (formatValueArgumentArityError funcName numParams numArgs)) + else if numArgs < numParams then + // Partial application: type-check provided args, then create lambda for remaining + let providedParamTypes = List.take numArgs origParamTypes + let remainingParamTypes = List.skip numArgs origParamTypes + + // Type-check the provided arguments + let rec checkProvidedArgs remaining paramTys accArgs = + match remaining, paramTys with + | [], [] -> Ok (List.rev accArgs) + | arg :: restArgs, paramT :: restParams -> + checkExpr arg env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some paramT) + |> Result.bind (fun (argType, arg') -> + if typesCompatibleWithAliases aliasReg paramT argType then + checkProvidedArgs restArgs restParams (arg' :: accArgs) + else + Error (TypeMismatch (paramT, argType, $"argument to {funcName}"))) + | _ -> Error (GenericError "Internal error: argument/param length mismatch") + + checkProvidedArgs args providedParamTypes [] + |> Result.bind (fun args' -> + // Create unique parameter names for the remaining parameters + let remainingParams = makePartialParams resolvedFuncName remainingParamTypes + + // Create the lambda body: call the original function with all args (using resolved name) + let allArgs = args' @ (remainingParams |> List.map (fun (name, _) -> Var name)) + let lambdaBody = Call (resolvedFuncName, toCallArgs allArgs) + + // Create the lambda: (p0, p1, ...) => funcName(providedArgs, p0, p1, ...) + let lambdaExpr = Lambda (toLambdaParams remainingParams, lambdaBody) + + // The resulting type is a function from remaining params to return type + let partialType = TFunction (remainingParamTypes, origReturnType) + + match expectedType with + | Some expected when not (typesCompatibleWithAliases aliasReg expected partialType) -> + Error (TypeMismatch (expected, partialType, $"partial application of {funcName}")) + | _ -> Ok (partialType, lambdaExpr)) + else + // Check each argument type and collect transformed args + let rec checkArgsWithTypes remaining paramTys paramIndex accArgs = + match remaining, paramTys with + | [], [] -> Ok (List.rev accArgs) + | arg :: restArgs, paramT :: restParams -> + let paramName = + paramNameForLegacyError funcParamNameReg resolvedFuncName paramIndex + + checkExpr arg env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some paramT) + |> Result.mapError (fun err -> + match err with + | TypeMismatch (_, actualType, _) when not (isRuntimeErrorType actualType) -> + GenericError + (formatLegacyParamTypeError + funcName + paramIndex + paramName + paramT + actualType + arg) + | _ -> + err) + |> Result.bind (fun (argType, arg') -> + if typesCompatibleWithAliases aliasReg paramT argType then + checkArgsWithTypes restArgs restParams (paramIndex + 1) (arg' :: accArgs) + else + Error ( + GenericError + (formatLegacyParamTypeError + funcName + paramIndex + paramName + paramT + argType + arg) + )) + | _ -> Error (GenericError "Internal error: argument/param length mismatch") + + checkArgsWithTypes args origParamTypes 1 [] + |> Result.bind (fun args' -> + match expectedType with + | Some expected when not (typesCompatibleWithAliases aliasReg expected origReturnType) -> + Error (TypeMismatch (expected, origReturnType, $"result of call to {funcName}")) + | _ -> Ok (origReturnType, Call (resolvedFuncName, toCallArgs args'))) + ) + | Some (TVar funcTypeVar, resolvedFuncName) -> + // In interpreter syntax, higher-order generic parameters may reach call sites + // before their function shape is concretized (for example in nested List.map). + // Keep the call typable and let surrounding generic reconciliation specialize it. + let rec checkArgsWithUnknownCallableType remaining accArgs = + match remaining with + | [] -> Ok (List.rev accArgs) + | arg :: restArgs -> + checkExpr arg env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg None + |> Result.bind (fun (_argType, arg') -> + checkArgsWithUnknownCallableType restArgs (arg' :: accArgs)) + + checkArgsWithUnknownCallableType args [] + |> Result.map (fun args' -> + let inferredReturnType = + match expectedType with + | Some expected -> expected + | None -> TVar $"__call_result_{funcTypeVar}" + (inferredReturnType, Call (resolvedFuncName, toCallArgs args'))) + | Some (other, _) -> + Error (GenericError $"{funcName} is not a function (has type {typeToString other})") + | None -> + // Check if it's a module function (e.g., Stdlib.Int64.add, __raw_get) + let moduleRegistry = Stdlib.buildModuleRegistry () + match Stdlib.tryGetFunctionWithFallback moduleRegistry funcName with + | Some (moduleFunc, resolvedFuncName) -> + ( + // Freshen type params to avoid name clashes with caller's scope + let (freshTypeParams, renaming) = freshenTypeParams moduleFunc.TypeParams + let paramTypes = moduleFunc.ParamTypes |> List.map (applyTypeVarRenaming renaming) + let returnType = applyTypeVarRenaming renaming moduleFunc.ReturnType + let typeParams = freshTypeParams + let numParams = List.length moduleFunc.ParamTypes + let args = normalizeNullaryCallArgs numParams args + let numArgs = List.length args + // Check argument count - allow partial application + if numArgs > numParams then + Error (GenericError (formatValueArgumentArityError funcName numParams numArgs)) + else if numArgs < numParams && List.isEmpty typeParams then + // Partial application of non-generic module function + let providedParamTypes = List.take numArgs paramTypes + let remainingParamTypes = List.skip numArgs paramTypes + + // Type-check the provided arguments + let rec checkProvidedArgs remaining paramTys accArgs = + match remaining, paramTys with + | [], [] -> Ok (List.rev accArgs) + | arg :: restArgs, paramT :: restParams -> + checkExpr arg env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some paramT) + |> Result.bind (fun (argType, arg') -> + if typesEqual aliasReg argType paramT then + checkProvidedArgs restArgs restParams (arg' :: accArgs) + else + Error (TypeMismatch (paramT, argType, $"argument to {funcName}"))) + | _ -> Error (GenericError "Internal error: argument/param length mismatch") + + checkProvidedArgs args providedParamTypes [] + |> Result.bind (fun args' -> + // Create unique parameter names for the remaining parameters + let remainingParams = makePartialParams resolvedFuncName remainingParamTypes + + // Create the lambda body: call the original function with all args (using resolved name) + let allArgs = args' @ (remainingParams |> List.map (fun (name, _) -> Var name)) + let lambdaBody = Call (resolvedFuncName, toCallArgs allArgs) + + // Create the lambda: (p0, p1, ...) => funcName(providedArgs, p0, p1, ...) + let lambdaExpr = Lambda (toLambdaParams remainingParams, lambdaBody) + + // The resulting type is a function from remaining params to return type + let partialType = TFunction (remainingParamTypes, returnType) + + match expectedType with + | Some expected when not (typesEqual aliasReg expected partialType) -> + Error (TypeMismatch (expected, partialType, $"partial application of {funcName}")) + | _ -> Ok (partialType, lambdaExpr)) + else if numArgs < numParams then + // Partial application of generic module function + let providedParamTypes = List.take numArgs paramTypes + let remainingParamTypes = List.skip numArgs paramTypes + + // Type-check provided arguments and collect bindings for type inference + let rec checkArgsAndInfer remaining paramTys accArgs accBindings = + match remaining, paramTys with + | [], [] -> Ok (List.rev accArgs, accBindings) + | arg :: restArgs, paramT :: restParams -> + checkExpr arg env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some paramT) + |> Result.bind (fun (argType, arg') -> + // Match param type against arg type to get type variable bindings + match matchTypes paramT argType with + | Ok bindings -> + checkArgsAndInfer restArgs restParams (arg' :: accArgs) (accBindings @ bindings) + | Error msg -> + Error (TypeMismatch (paramT, argType, $"argument to {funcName}: {msg}"))) + | _ -> Error (GenericError "Internal error: argument/param length mismatch") + + checkArgsAndInfer args providedParamTypes [] [] + |> Result.bind (fun (args', bindings) -> + // Consolidate bindings and build substitution + consolidateBindings bindings + |> Result.mapError GenericError + |> Result.bind (fun bindingMap -> + // Build type arguments list from inferred bindings + // For partial application, some type params may not be inferrable yet + let inferredTypeArgs = + typeParams + |> List.map (fun paramName -> + match Map.tryFind paramName bindingMap with + | Some typ -> typ + | None -> TVar paramName) // Keep as type variable if not inferred + + // Build full substitution (inferred types only, not type vars) + let subst = bindingMap + + // Apply substitution to remaining param types and return type + let concreteRemainingTypes = remainingParamTypes |> List.map (applySubst subst) + let concreteReturnType = applySubst subst returnType + + // Create unique parameter names for the remaining parameters + let remainingParams = makePartialParams resolvedFuncName concreteRemainingTypes + + // Create the lambda body: TypeApp call with all args (using resolved name) + let allArgs = args' @ (remainingParams |> List.map (fun (name, _) -> Var name)) + let lambdaBody = TypeApp (resolvedFuncName, inferredTypeArgs, toCallArgs allArgs) + + // Create the lambda + let lambdaExpr = Lambda (toLambdaParams remainingParams, lambdaBody) + + // The resulting type is a function from remaining params to return type + let partialType = TFunction (concreteRemainingTypes, concreteReturnType) + + match expectedType with + | Some expected when not (typesCompatible expected partialType) -> + Error (TypeMismatch (expected, partialType, $"partial application of {funcName}")) + | _ -> Ok (partialType, lambdaExpr))) + else if not (List.isEmpty typeParams) then + // Generic module function: infer type arguments from actual argument types + // Type-check arguments left-to-right while propagating inferred bindings. + // This lets later args see concrete expectations inferred from earlier args. + let rec checkArgsWithBindings remaining remainingParamTypes accTypes accExprs accBindings = + match remaining, remainingParamTypes with + | [], [] -> + Ok (List.rev accTypes, List.rev accExprs) + | arg :: restArgs, paramT :: restParams -> + consolidateBindings accBindings + |> Result.mapError GenericError + |> Result.bind (fun bindingMap -> + let concreteParamType = applySubst bindingMap paramT + checkExpr + arg + env + typeReg + variantLookup + genericFuncReg + warningSettings + moduleRegistry + aliasReg + (Some concreteParamType) + |> Result.bind (fun (argType, arg') -> + match matchTypes concreteParamType argType with + | Ok newBindings -> + let combinedBindings = accBindings @ newBindings + consolidateBindings combinedBindings + |> Result.mapError GenericError + |> Result.bind (fun combinedBindingMap -> + let concreteArgType = applySubst combinedBindingMap argType + checkArgsWithBindings + restArgs + restParams + (concreteArgType :: accTypes) + (arg' :: accExprs) + combinedBindings) + | Error msg -> + Error (TypeMismatch (concreteParamType, argType, $"argument to {funcName}: {msg}"))) + ) + | _ -> + Error (GenericError "Argument count mismatch") + + checkArgsWithBindings args paramTypes [] [] [] + |> Result.bind (fun (argTypes, args') -> + // Infer type arguments from parameter types, argument types, and expected return type + inferTypeArgs typeParams paramTypes argTypes (Some returnType) expectedType + |> Result.mapError GenericError + |> Result.bind (fun inferredTypeArgs -> + // Build substitution and compute concrete types + buildSubstitution typeParams inferredTypeArgs + |> Result.mapError GenericError + |> Result.bind (fun subst -> + let concreteReturnType = applySubst subst returnType + match expectedType with + | Some expected when not (typesCompatible expected concreteReturnType) -> + Error (TypeMismatch (expected, concreteReturnType, $"result of call to {funcName}")) + | _ -> + // Transform Call to TypeApp with inferred type arguments (using resolved name) + Ok ( + concreteReturnType, + TypeApp (resolvedFuncName, inferredTypeArgs, toCallArgs args') + )))) + else + // Non-generic module function: regular call + // Check each argument type and collect transformed args + let rec checkArgsWithTypes remaining paramTys accArgs = + match remaining, paramTys with + | [], [] -> Ok (List.rev accArgs) + | arg :: restArgs, paramT :: restParams -> + checkExpr arg env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some paramT) + |> Result.bind (fun (argType, arg') -> + if typesCompatibleWithAliases aliasReg paramT argType then + checkArgsWithTypes restArgs restParams (arg' :: accArgs) + else + Error (TypeMismatch (paramT, argType, $"argument to {funcName}"))) + | _ -> Error (GenericError "Internal error: argument/param length mismatch") + + checkArgsWithTypes args paramTypes [] + |> Result.bind (fun args' -> + match expectedType with + | Some expected when not (typesCompatibleWithAliases aliasReg expected returnType) -> + Error (TypeMismatch (expected, returnType, $"result of call to {funcName}")) + | _ -> Ok (returnType, Call (resolvedFuncName, toCallArgs args'))) + ) + | None -> + Error (UndefinedCallTarget funcName) + + | TypeApp (funcName, typeArgs, args) -> + // Generic function call with explicit type arguments: func(args) + // 1. Look up function signature with fallback to Stdlib prefix + let args = NonEmptyList.toList args + match tryLookupWithFallback funcName env with + | Some (TFunction (paramTypes, returnType), resolvedFuncName) -> + // 2. Look up type parameters + match tryLookupWithFallback resolvedFuncName genericFuncReg.Functions with + | Some (typeParams, _) -> + let expectedTypeArgCount = List.length typeParams + let actualTypeArgCount = List.length typeArgs + if expectedTypeArgCount <> actualTypeArgCount then + Error ( + GenericError ( + formatTypeArgumentArityError funcName expectedTypeArgCount actualTypeArgCount + ) + ) + else + // 3. Build substitution from type params to type args + buildSubstitution typeParams typeArgs + |> Result.mapError GenericError + |> Result.bind (fun subst -> + // 4. Apply substitution to get concrete types + let concreteParamTypes = List.map (applySubst subst) paramTypes + let concreteReturnType = applySubst subst returnType + + // 5. Check argument count - allow partial application + let numParams = List.length concreteParamTypes + let args = normalizeNullaryCallArgs numParams args + let numArgs = List.length args + if numArgs > numParams then + Error (GenericError (formatValueArgumentArityError funcName numParams numArgs)) + else if numArgs < numParams then + // Partial application with explicit type args + let providedParamTypes = List.take numArgs concreteParamTypes + let remainingParamTypes = List.skip numArgs concreteParamTypes + + // Type-check the provided arguments + let rec checkProvidedArgs remaining paramTys paramIndex accArgs = + match remaining, paramTys with + | [], [] -> Ok (List.rev accArgs) + | arg :: restArgs, paramT :: restParams -> + let paramName = + paramNameForLegacyError funcParamNameReg resolvedFuncName paramIndex + + checkExpr arg env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some paramT) + |> Result.mapError (fun err -> + match err with + | TypeMismatch (_, actualType, _) when not (isRuntimeErrorType actualType) -> + GenericError + (formatLegacyParamTypeError + funcName + paramIndex + paramName + paramT + actualType + arg) + | _ -> + err) + |> Result.bind (fun (argType, arg') -> + // Use typesCompatible to allow type variables to unify with concrete types + if typesCompatible paramT argType then + checkProvidedArgs restArgs restParams (paramIndex + 1) (arg' :: accArgs) + else + Error ( + GenericError + (formatLegacyParamTypeError + funcName + paramIndex + paramName + paramT + argType + arg) + )) + | _ -> Error (GenericError "Internal error: argument/param length mismatch") + + checkProvidedArgs args providedParamTypes 1 [] + |> Result.bind (fun args' -> + // Create unique parameter names for the remaining parameters + let remainingParams = makePartialParams resolvedFuncName remainingParamTypes + + // Create the lambda body: TypeApp call with all args (using resolved name) + let allArgs = args' @ (remainingParams |> List.map (fun (name, _) -> Var name)) + let lambdaBody = TypeApp (resolvedFuncName, typeArgs, toCallArgs allArgs) + + // Create the lambda + let lambdaExpr = Lambda (toLambdaParams remainingParams, lambdaBody) + + // The resulting type is a function from remaining params to return type + let partialType = TFunction (remainingParamTypes, concreteReturnType) + + match expectedType with + | Some expected when not (typesCompatible expected partialType) -> + Error (TypeMismatch (expected, partialType, $"partial application of {funcName}")) + | _ -> Ok (partialType, lambdaExpr)) + else + // 6. Type check each argument and collect transformed args + let rec checkArgsWithTypes remaining paramTys paramIndex accArgs = + match remaining, paramTys with + | [], [] -> Ok (List.rev accArgs) + | arg :: restArgs, paramT :: restParams -> + let paramName = + paramNameForLegacyError funcParamNameReg resolvedFuncName paramIndex + + checkExpr arg env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some paramT) + |> Result.mapError (fun err -> + match err with + | TypeMismatch (_, actualType, _) when not (isRuntimeErrorType actualType) -> + GenericError + (formatLegacyParamTypeError + funcName + paramIndex + paramName + paramT + actualType + arg) + | _ -> + err) + |> Result.bind (fun (argType, arg') -> + // Use typesCompatible to allow type variables to unify with concrete types + if typesCompatible paramT argType then + checkArgsWithTypes restArgs restParams (paramIndex + 1) (arg' :: accArgs) + else + Error ( + GenericError + (formatLegacyParamTypeError + funcName + paramIndex + paramName + paramT + argType + arg) + )) + | _ -> Error (GenericError "Internal error: argument/param length mismatch") + + checkArgsWithTypes args concreteParamTypes 1 [] + |> Result.bind (fun args' -> + // 7. Return the concrete return type (using resolved name) + // Use typesCompatible to allow type variables to unify with concrete types + match expectedType with + | Some expected when not (typesCompatible expected concreteReturnType) -> + Error (TypeMismatch (expected, concreteReturnType, $"result of call to {funcName}")) + | _ -> + Ok ( + concreteReturnType, + TypeApp (resolvedFuncName, typeArgs, toCallArgs args') + ))) + | None -> + Error (GenericError $"Function {funcName} is not generic, use regular call syntax") + | Some (other, _) -> + Error (GenericError $"{funcName} is not a function (has type {typeToString other})") + | None -> + // Check if it's a generic module function (e.g., __raw_get) + let moduleRegistry = Stdlib.buildModuleRegistry () + match Stdlib.tryGetFunctionWithFallback moduleRegistry funcName with + | Some (moduleFunc, resolvedFuncName) when not (List.isEmpty moduleFunc.TypeParams) -> + let typeParams = moduleFunc.TypeParams + let paramTypes = moduleFunc.ParamTypes + let returnType = moduleFunc.ReturnType + let expectedTypeArgCount = List.length typeParams + let actualTypeArgCount = List.length typeArgs + if expectedTypeArgCount <> actualTypeArgCount then + Error ( + GenericError ( + formatTypeArgumentArityError funcName expectedTypeArgCount actualTypeArgCount + ) + ) + else + // Build substitution from type params to type args + buildSubstitution typeParams typeArgs + |> Result.mapError GenericError + |> Result.bind (fun subst -> + // Apply substitution to get concrete types + let concreteParamTypes = List.map (applySubst subst) paramTypes + let concreteReturnType = applySubst subst returnType + + // Check argument count - allow partial application + let numParams = List.length concreteParamTypes + let args = normalizeNullaryCallArgs numParams args + let numArgs = List.length args + if numArgs > numParams then + Error (GenericError (formatValueArgumentArityError funcName numParams numArgs)) + else if numArgs < numParams then + // Partial application with explicit type args + let providedParamTypes = List.take numArgs concreteParamTypes + let remainingParamTypes = List.skip numArgs concreteParamTypes + + // Type-check the provided arguments + let rec checkProvidedArgs remaining paramTys paramIndex accArgs = + match remaining, paramTys with + | [], [] -> Ok (List.rev accArgs) + | arg :: restArgs, paramT :: restParams -> + let paramName = + paramNameForLegacyError funcParamNameReg resolvedFuncName paramIndex + + checkExpr arg env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some paramT) + |> Result.mapError (fun err -> + match err with + | TypeMismatch (_, actualType, _) when not (isRuntimeErrorType actualType) -> + GenericError + (formatLegacyParamTypeError + funcName + paramIndex + paramName + paramT + actualType + arg) + | _ -> + err) + |> Result.bind (fun (argType, arg') -> + // Use typesCompatible to allow type variables to unify with concrete types + if typesCompatible paramT argType then + checkProvidedArgs restArgs restParams (paramIndex + 1) (arg' :: accArgs) + else + Error ( + GenericError + (formatLegacyParamTypeError + funcName + paramIndex + paramName + paramT + argType + arg) + )) + | _ -> Error (GenericError "Internal error: argument/param length mismatch") + + checkProvidedArgs args providedParamTypes 1 [] + |> Result.bind (fun args' -> + // Create unique parameter names for the remaining parameters + let remainingParams = makePartialParams resolvedFuncName remainingParamTypes + + // Create the lambda body: TypeApp call with all args (using resolved name) + let allArgs = args' @ (remainingParams |> List.map (fun (name, _) -> Var name)) + let lambdaBody = TypeApp (resolvedFuncName, typeArgs, toCallArgs allArgs) + + // Create the lambda + let lambdaExpr = Lambda (toLambdaParams remainingParams, lambdaBody) + + // The resulting type is a function from remaining params to return type + let partialType = TFunction (remainingParamTypes, concreteReturnType) + + match expectedType with + | Some expected when not (typesCompatible expected partialType) -> + Error (TypeMismatch (expected, partialType, $"partial application of {funcName}")) + | _ -> Ok (partialType, lambdaExpr)) + else + // Type check each argument and collect transformed args + let rec checkArgsWithTypes remaining paramTys paramIndex accArgs = + match remaining, paramTys with + | [], [] -> Ok (List.rev accArgs) + | arg :: restArgs, paramT :: restParams -> + let paramName = + paramNameForLegacyError funcParamNameReg resolvedFuncName paramIndex + + checkExpr arg env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some paramT) + |> Result.mapError (fun err -> + match err with + | TypeMismatch (_, actualType, _) when not (isRuntimeErrorType actualType) -> + GenericError + (formatLegacyParamTypeError + funcName + paramIndex + paramName + paramT + actualType + arg) + | _ -> + err) + |> Result.bind (fun (argType, arg') -> + // Use typesCompatible to allow type variables to unify with concrete types + if typesCompatible paramT argType then + checkArgsWithTypes restArgs restParams (paramIndex + 1) (arg' :: accArgs) + else + Error ( + GenericError + (formatLegacyParamTypeError + funcName + paramIndex + paramName + paramT + argType + arg) + )) + | _ -> Error (GenericError "Internal error: argument/param length mismatch") + + checkArgsWithTypes args concreteParamTypes 1 [] + |> Result.bind (fun args' -> + // Use typesCompatible to allow type variables to unify with concrete types + match expectedType with + | Some expected when not (typesCompatible expected concreteReturnType) -> + Error (TypeMismatch (expected, concreteReturnType, $"result of call to {funcName}")) + | _ -> + Ok ( + concreteReturnType, + TypeApp (resolvedFuncName, typeArgs, toCallArgs args') + ))) + | Some (_, _) -> + Error (GenericError $"Function {funcName} is not generic, use regular call syntax") + | None -> + Error (UndefinedCallTarget funcName) + + | TupleLiteral elements -> + // Type-check each element and build tuple type + let expectedElemTypes = + match expectedType with + | Some expected -> + match resolveType aliasReg expected with + | TTuple elemTypes when List.length elemTypes = List.length elements -> + elemTypes |> List.map Some + | _ -> List.replicate (List.length elements) None + | None -> List.replicate (List.length elements) None + + let rec checkElements elems expectedElems accTypes accExprs = + match elems, expectedElems with + | [], [] -> Ok (List.rev accTypes, List.rev accExprs) + | e :: rest, expectedElem :: expectedRest -> + checkExpr e env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg expectedElem + |> Result.bind (fun (elemType, e') -> + checkElements rest expectedRest (elemType :: accTypes) (e' :: accExprs)) + | _ -> Ok (List.rev accTypes, List.rev accExprs) + checkElements elements expectedElemTypes [] [] + |> Result.bind (fun (elemTypes, elements') -> + // Tuple elements that are known runtime failures should make the whole + // tuple expression runtime-fail (bottom-like behavior), preserving the + // left-to-right first failure. + let firstRuntimeErrorElem = + elements' + |> List.tryFind (isKnownTestRuntimeErrorExpr Map.empty) + + match firstRuntimeErrorElem with + | Some runtimeErrExpr -> + let outputType = + match expectedType with + | Some expected -> expected + | None -> TRuntimeError + + let runtimeErrCall = + match runtimeErrExpr with + | Call (funcName, { Head = argExpr; Tail = [] }) when isBuiltinTestRuntimeErrorName funcName -> + Call ("Builtin.testRuntimeError", NonEmptyList.singleton argExpr) + | _ -> + match tryExtractKnownTestRuntimeErrorMessage Map.empty runtimeErrExpr with + | Some msg -> Call ("Builtin.testRuntimeError", NonEmptyList.singleton (StringLiteral msg)) + | None -> + Call ( + "Builtin.testRuntimeError", + NonEmptyList.singleton (StringLiteral "") + ) + + Ok (outputType, runtimeErrCall) + | None -> + let tupleType = TTuple elemTypes + match expectedType with + | Some expected -> + // Resolve type aliases first, then check compatibility for type variables + // This allows Pair to match (Int64, Int64) when Pair = (a, a) + // and (a, b) to match (Int64, Int64) when using generic functions + let resolvedExpected = resolveType aliasReg expected + if typesCompatible resolvedExpected tupleType then + Ok (tupleType, TupleLiteral elements') + else + Error (TypeMismatch (expected, tupleType, "tuple literal")) + | None -> Ok (tupleType, TupleLiteral elements')) + + | TupleAccess (tupleExpr, index) -> + // Check the tuple expression + checkExpr tupleExpr env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg None + |> Result.bind (fun (tupleType, tupleExpr') -> + match tupleType with + | TTuple elemTypes -> + if index < 0 || index >= List.length elemTypes then + Error (GenericError $"Tuple index {index} out of bounds (tuple has {List.length elemTypes} elements)") + else + let elemType = List.item index elemTypes + match expectedType with + | Some expected when expected <> elemType -> + Error (TypeMismatch (expected, elemType, $"tuple access .{index}")) + | _ -> Ok (elemType, TupleAccess (tupleExpr', index)) + | other -> + Error (GenericError $"Cannot access .{index} on non-tuple type {typeToString other}")) + + | RecordLiteral (typeName, fields) -> + // Type name is required (parser enforces this, but check for safety) + if typeName = "" then + Error (GenericError "Record literal requires type name: use 'TypeName { field = value, ... }'") + else + // Resolve type alias if present + let resolvedTypeName = resolveTypeName aliasReg typeName + match Map.tryFind resolvedTypeName typeReg with + | None -> + Error (GenericError $"Unknown record type: {typeName}") + | Some expectedFields -> + // Check that all fields are present and have correct types + let fieldMap = Map.ofList fields + + // Check for missing fields + let missingFields = + expectedFields + |> List.filter (fun (fname, _) -> not (Map.containsKey fname fieldMap)) + |> List.map fst + + if not (List.isEmpty missingFields) then + let missingStr = String.concat ", " missingFields + Error (GenericError $"Missing fields in record literal: {missingStr}") + else + // Check for extra fields + let expectedFieldNames = expectedFields |> List.map fst |> Set.ofList + let extraFields = + fields + |> List.filter (fun (fname, _) -> not (Set.contains fname expectedFieldNames)) + |> List.map fst + + if not (List.isEmpty extraFields) then + let extraStr = String.concat ", " extraFields + Error (GenericError $"Unknown fields in record literal: {extraStr}") + else + // Type check each field, infer generic bindings, and collect transformed fields. + let rec checkFieldsInOrder + (remaining: (string * Type) list) + (accFields: (string * Expr) list) + (accBindings: (string * Type) list) + : Result<(string * Expr) list * (string * Type) list, TypeError> = + match remaining with + | [] -> Ok (List.rev accFields, accBindings) + | (fname, expectedFieldType) :: rest -> + match Map.tryFind fname fieldMap with + | Some fieldExpr -> + match + checkExpr + fieldExpr + env + typeReg + variantLookup + genericFuncReg + warningSettings + moduleRegistry + aliasReg + (Some expectedFieldType) + with + | Error (TypeMismatch (_, actualType, _)) -> + Error + (GenericError + (formatLegacyRecordFieldTypeError + aliasReg + fname + expectedFieldType + actualType + fieldExpr)) + | Error err -> + Error err + | Ok (actualType, fieldExpr') -> + let resolvedExpectedFieldType = resolveType aliasReg expectedFieldType + let resolvedActualType = resolveType aliasReg actualType + match matchTypes resolvedExpectedFieldType resolvedActualType with + | Ok newBindings -> + checkFieldsInOrder + rest + ((fname, fieldExpr') :: accFields) + (accBindings @ newBindings) + | Error _ -> + Error + (GenericError + (formatLegacyRecordFieldTypeError + aliasReg + fname + expectedFieldType + actualType + fieldExpr)) + | None -> + checkFieldsInOrder rest accFields accBindings // Already checked for missing fields + + checkFieldsInOrder expectedFields [] [] + |> Result.bind (fun (fields', rawBindings) -> + match consolidateBindings rawBindings with + | Error msg -> + Error (GenericError $"Incompatible generic record field types: {msg}") + | Ok subst -> + let inferredTypeParams = inferRecordTypeParamsFromFields expectedFields + let inferredTypeArgs = + inferredTypeParams + |> List.map (fun name -> Map.tryFind name subst |> Option.defaultValue (TVar name)) + let inferredRecordType = TRecord (resolvedTypeName, inferredTypeArgs) + + match expectedType with + | Some expected -> + if typesCompatibleWithAliases aliasReg expected inferredRecordType then + Ok (inferredRecordType, RecordLiteral (resolvedTypeName, fields')) + else + Error (TypeMismatch (expected, inferredRecordType, "record literal")) + | None -> + Ok (inferredRecordType, RecordLiteral (resolvedTypeName, fields'))) + + | RecordUpdate (recordExpr, updates) -> + // Check the record expression to get its type + checkExpr recordExpr env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg None + |> Result.bind (fun (recordType, recordExpr') -> + match recordType with + | TRecord (typeName, typeArgs) -> + // Resolve type alias before looking up in typeReg + let resolvedTypeName = resolveTypeName aliasReg typeName + match Map.tryFind resolvedTypeName typeReg with + | None -> + Error (GenericError $"Unknown record type: {typeName}") + | Some expectedFields -> + let subst = + match buildRecordFieldSubstitution expectedFields typeArgs with + | Ok s -> s + | Error _ -> Map.empty + + // Check for unknown fields in update + let expectedFieldNames = expectedFields |> List.map fst |> Set.ofList + let unknownFields = + updates + |> List.filter (fun (fname, _) -> not (Set.contains fname expectedFieldNames)) + |> List.map fst + + if not (List.isEmpty unknownFields) then + let unknownStr = String.concat ", " unknownFields + Error (GenericError $"Unknown fields in record update: {unknownStr}") + else + // Build a map from field name to expected type + let fieldTypeMap = expectedFields |> Map.ofList + + // Type check each update field + let rec checkUpdates remaining accUpdates = + match remaining with + | [] -> Ok (List.rev accUpdates) + | (fname, updateExpr) :: rest -> + match Map.tryFind fname fieldTypeMap with + | Some fieldTypePattern -> + let expectedFieldType = applySubst subst fieldTypePattern + checkExpr updateExpr env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some expectedFieldType) + |> Result.bind (fun (actualType, updateExpr') -> + if typesCompatibleWithAliases aliasReg expectedFieldType actualType then + checkUpdates rest ((fname, updateExpr') :: accUpdates) + else + Error (TypeMismatch (expectedFieldType, actualType, $"field {fname} in record update"))) + | None -> + Error (GenericError $"Field {fname} not found in record type {typeName}") + + checkUpdates updates [] + |> Result.map (fun updates' -> (TRecord (resolvedTypeName, typeArgs), RecordUpdate (recordExpr', updates'))) + | other -> + Error (GenericError $"Cannot use record update syntax on non-record type {typeToString other}")) + + | RecordAccess (recordExpr, fieldName) -> + // Check the record expression + checkExpr recordExpr env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg None + |> Result.bind (fun (recordType, recordExpr') -> + match recordType with + | TRecord (typeName, typeArgs) -> + // Resolve type alias before looking up in typeReg + let resolvedTypeName = resolveTypeName aliasReg typeName + match Map.tryFind resolvedTypeName typeReg with + | None -> + Error (GenericError $"Unknown record type: {typeName}") + | Some fields -> + match List.tryFind (fun (name, _) -> name = fieldName) fields with + | None -> + Error (GenericError $"Record type {typeName} has no field '{fieldName}'") + | Some (_, fieldTypePattern) -> + let fieldType = + match buildRecordFieldSubstitution fields typeArgs with + | Ok subst -> applySubst subst fieldTypePattern + | Error _ -> fieldTypePattern + match expectedType with + | Some expected when not (typesCompatibleWithAliases aliasReg expected fieldType) -> + Error (TypeMismatch (expected, fieldType, $"field access .{fieldName}")) + | _ -> Ok (fieldType, RecordAccess (recordExpr', fieldName)) + | other -> + Error (GenericError $"Cannot access .{fieldName} on non-record type {typeToString other}")) + + | Constructor (constrTypeName, variantName, payload) -> + // Look up the variant to find its type and expected payload + match Map.tryFind variantName variantLookup with + | None -> + Error (GenericError $"Unknown constructor: {variantName}") + | Some (typeName, typeParams, _tag, expectedPayload) -> + match expectedPayload, payload with + | None, None -> + // Variant without payload, no payload provided - OK + if List.isEmpty typeParams then + // Non-generic type - simple case + let sumType = TSum (typeName, []) + match expectedType with + | Some expected when expected <> sumType -> + Error (TypeMismatch (expected, sumType, $"constructor {variantName}")) + | _ -> Ok (sumType, expr) + else + // Generic type with nullary constructor (e.g., None in Option) + // Try to get type arguments from expectedType + match expectedType with + | Some (TSum (expectedName, args)) when expectedName = typeName && List.length args = List.length typeParams -> + // Use type args from expected type + let sumType = TSum (typeName, args) + Ok (sumType, expr) + | Some expected -> + // Expected type doesn't match - error + let sumTypeWithVars = TSum (typeName, typeParams |> List.map TVar) + Error (TypeMismatch (expected, sumTypeWithVars, $"constructor {variantName}")) + | None -> + // No expected type - return type with unresolved type variables + // This allows type inference to resolve them later from context + let sumType = TSum (typeName, typeParams |> List.map TVar) + Ok (sumType, expr) + | None, Some _ -> + // Variant doesn't take payload but one was provided + Error (GenericError $"Constructor {variantName} does not take a payload") + | Some _, None -> + // Variant requires payload but none provided + Error (GenericError $"Constructor {variantName} requires a payload") + | Some payloadType, Some payloadExpr -> + // Variant with payload - check payload type + // For generic types, infer type variables from the payload + if List.isEmpty typeParams then + // Non-generic type - check payload has exact type + checkExpr payloadExpr env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some payloadType) + |> Result.bind (fun (actualPayloadType, payloadExpr') -> + // Use typesCompatible to allow type variables to match concrete types + if not (typesCompatible payloadType actualPayloadType) then + Error (TypeMismatch (payloadType, actualPayloadType, $"payload of {variantName}")) + else + let sumType = TSum (typeName, []) + match expectedType with + | Some expected -> + // Use reconcileTypes to allow type variables to unify with concrete types + match reconcileTypes (Some aliasReg) expected sumType with + | None -> Error (TypeMismatch (expected, sumType, $"constructor {variantName}")) + | Some reconciledType -> Ok (reconciledType, Constructor (constrTypeName, variantName, Some payloadExpr')) + | None -> Ok (sumType, Constructor (constrTypeName, variantName, Some payloadExpr'))) + else + // Generic type - infer type variables from payload + // First, check the payload expression without expected type + checkExpr payloadExpr env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg None + |> Result.bind (fun (actualPayloadType, payloadExpr') -> + // Try to unify payloadType (may contain TVar) with actualPayloadType + match unifyTypes payloadType actualPayloadType with + | Error msg -> + Error (GenericError $"Type mismatch in {variantName} payload: {msg}") + | Ok subst -> + // Apply substitution to verify all type vars are resolved + let concretePayloadType = applySubst subst payloadType + // Use typesCompatible to allow type variables to match concrete types + if not (typesCompatible concretePayloadType actualPayloadType) then + Error (TypeMismatch (concretePayloadType, actualPayloadType, $"payload of {variantName}")) + else + // Build concrete type arguments from substitution + // For unresolved type vars, try to get them from expectedType + let expectedArgs = + match expectedType with + | Some (TSum (expectedName, args)) when expectedName = typeName && List.length args = List.length typeParams -> + Some args + | _ -> None + let typeArgs = typeParams |> List.mapi (fun i p -> + match Map.tryFind p subst with + | Some t -> t + | None -> + // Try to get from expected type args + match expectedArgs with + | Some args -> List.item i args + | None -> TVar p) + let sumType = TSum (typeName, typeArgs) + match expectedType with + | Some expected -> + // Use reconcileTypes to allow type variables to unify with concrete types + match reconcileTypes (Some aliasReg) expected sumType with + | None -> Error (TypeMismatch (expected, sumType, $"constructor {variantName}")) + | Some reconciledType -> Ok (reconciledType, Constructor (constrTypeName, variantName, Some payloadExpr')) + | None -> Ok (sumType, Constructor (constrTypeName, variantName, Some payloadExpr'))) + + | Match (scrutinee, cases) -> + let scrutineeExpectedType = + match scrutinee with + | ListLiteral [] -> Some (TList (TVar "t")) + | _ -> None + + // Type check the scrutinee first + checkExpr scrutinee env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg scrutineeExpectedType + |> Result.bind (fun (scrutineeType, scrutinee') -> + // Extract bindings from a pattern based on scrutinee type + let rec extractPatternBindings + (pattern: Pattern) + (patternType: Type) + (allowNoMatchForKnownListLengthMismatch: bool) + : Result<(string * Type) list, TypeError> = + let ensureLiteralType + (expectedType: Type) + : Result<(string * Type) list, TypeError> = + let expectedPatternTypeTextOverride = None + let resolvedPatternType = resolveType aliasReg patternType + match resolvedPatternType with + | t when isRuntimeErrorType t -> + // Runtime error scrutinees are bottom-like: allow typechecking to proceed + // so evaluation order preserves the runtime failure at execution time. + Ok [] + | t when t = expectedType -> + Ok [] + | TVar _ -> + // Leave unresolved pattern literals flexible until concrete type information arrives. + // This is important for patterns like `match [] with | [1L] -> ...`. + Ok [] + | _ -> + let message = + formatPatternMismatchError + scrutinee' + resolvedPatternType + expectedType + expectedPatternTypeTextOverride + Error (GenericError message) + + let ensureStringOrCharPatternType () : Result<(string * Type) list, TypeError> = + let resolvedPatternType = resolveType aliasReg patternType + match resolvedPatternType with + | t when isRuntimeErrorType t -> + // See ensureLiteralType: preserve runtime-error propagation by not + // rejecting pattern type checks on known failing scrutinees. + Ok [] + | TString + | TChar + | TVar _ -> + Ok [] + | _ -> + let message = + formatPatternMismatchError scrutinee' resolvedPatternType TString None + Error (GenericError message) + + match pattern with + | PUnit -> ensureLiteralType TUnit + | PWildcard -> Ok [] + | PInt64 _ -> ensureLiteralType TInt64 + | PInt128Literal _ -> ensureLiteralType TInt128 + | PInt8Literal _ -> ensureLiteralType TInt8 + | PInt16Literal _ -> ensureLiteralType TInt16 + | PInt32Literal _ -> ensureLiteralType TInt32 + | PUInt8Literal _ -> ensureLiteralType TUInt8 + | PUInt16Literal _ -> ensureLiteralType TUInt16 + | PUInt32Literal _ -> ensureLiteralType TUInt32 + | PUInt64Literal _ -> ensureLiteralType TUInt64 + | PUInt128Literal _ -> ensureLiteralType TUInt128 + | PBool _ -> ensureLiteralType TBool + | PString _ -> ensureStringOrCharPatternType () + | PChar _ -> ensureLiteralType TChar + | PFloat _ -> ensureLiteralType TFloat64 + | PVar name -> Ok [(name, patternType)] + | PConstructor (variantName, payloadPattern) -> + match Map.tryFind variantName variantLookup with + | None -> Error (GenericError $"Unknown variant in pattern: {variantName}") + | Some (typeName, typeParams, _, payloadType) -> + // Get type arguments from scrutinee type to substitute into payload type + let typeArgs = + match patternType with + | TSum (_, args) -> args + | _ -> [] + // Build substitution from type params to type args + let subst = + if List.length typeParams = List.length typeArgs then + List.zip typeParams typeArgs |> Map.ofList + else + Map.empty + match payloadPattern, payloadType with + | None, None -> Ok [] + | None, Some _ -> + // Pattern omitted payload for a payload-carrying variant. + // Treat as a non-binding pattern; match lowering will make it non-matching. + Ok [] + | Some innerPattern, Some pType -> + // Apply substitution to get concrete payload type + let concretePayloadType = applySubst subst pType + extractPatternBindings innerPattern concretePayloadType allowNoMatchForKnownListLengthMismatch + | Some _, None -> + // Pattern supplied payload for a nullary variant. + // Treat as a non-binding pattern; match lowering will make it non-matching. + Ok [] + | PTuple patterns -> + let rec containsVariableBinding (innerPattern: Pattern) : bool = + match innerPattern with + | PVar _ -> true + | PConstructor (_, Some payloadPattern) -> containsVariableBinding payloadPattern + | PTuple nestedPatterns + | PList nestedPatterns -> + nestedPatterns |> List.exists containsVariableBinding + | PRecord (_, fieldPatterns) -> + fieldPatterns + |> List.exists (fun (_, fieldPattern) -> containsVariableBinding fieldPattern) + | PListCons (headPatterns, tailPattern) -> + List.exists containsVariableBinding headPatterns + || containsVariableBinding tailPattern + | _ -> false + + let collectTupleBindingsWithTypes (elementTypes: Type list) : Result<(string * Type) list, TypeError> = + List.zip patterns elementTypes + |> List.map (fun (p, t) -> + extractPatternBindings p t allowNoMatchForKnownListLengthMismatch) + |> List.fold (fun acc res -> + match acc, res with + | Ok bindings, Ok newBindings -> Ok (bindings @ newBindings) + | Error e, _ -> Error e + | _, Error e -> Error e) (Ok []) + + // Resolve type alias before matching (e.g., Pair -> (Int64, Int64)) + let resolvedPatternType = resolveType aliasReg patternType + match resolvedPatternType with + | TTuple elementTypes when List.length patterns = List.length elementTypes -> + collectTupleBindingsWithTypes elementTypes + | TVar tupleTypeVar -> + let unresolvedElementTypes = + patterns + |> List.mapi (fun idx _ -> TVar $"__tuple_elem_{tupleTypeVar}_{idx}") + collectTupleBindingsWithTypes unresolvedElementTypes + | TTuple _ -> + // Tuple arity mismatch in pattern should be treated as a non-match. + // Match lowering emits a false condition for this pattern shape. + Ok [] + | _ -> + if isRuntimeErrorType resolvedPatternType then + // Preserve runtime error propagation for known failing scrutinees. + Ok [] + elif patterns |> List.exists containsVariableBinding then + // Keep non-binding behavior for tuple patterns that would otherwise + // introduce guard/body variables on an incompatible scrutinee type. + Ok [] + else + let valueText = + match formatPatternMismatchValue scrutinee' with + | Some text -> text + | None -> "" + let message = + $"Cannot match {typeToString resolvedPatternType} value {valueText} with a Tuple pattern" + Error (GenericError message) + | PRecord (_, fieldPatterns) -> + match patternType with + | TRecord (recordName, recordTypeArgs) -> + // Resolve type alias before looking up in typeReg + let resolvedRecordName = resolveTypeName aliasReg recordName + match Map.tryFind resolvedRecordName typeReg with + | Some fields -> + let subst = + match buildRecordFieldSubstitution fields recordTypeArgs with + | Ok s -> s + | Error _ -> Map.empty + fieldPatterns + |> List.map (fun (fieldName, pat) -> + match List.tryFind (fun (n, _) -> n = fieldName) fields with + | Some (_, fieldType) -> + let concreteFieldType = applySubst subst fieldType + extractPatternBindings + pat + concreteFieldType + allowNoMatchForKnownListLengthMismatch + | None -> Error (GenericError $"Unknown field in pattern: {fieldName}")) + |> List.fold (fun acc res -> + match acc, res with + | Ok bindings, Ok newBindings -> Ok (bindings @ newBindings) + | Error e, _ -> Error e + | _, Error e -> Error e) (Ok []) + | None -> Error (GenericError $"Unknown record type: {recordName}") + | _ -> Error (GenericError "Record pattern used on non-record type") + | PList patterns -> + let resolvedPatternType = resolveType aliasReg patternType + match resolvedPatternType with + | TList elemType -> + let hasDefiniteLiteralTypeMismatch = + let resolvedElemType = resolveType aliasReg elemType + let isKnownMismatch expectedType = + match resolvedElemType with + | TVar _ -> false + | _ -> resolvedElemType <> expectedType + let isKnownStringPatternMismatch () = + match resolvedElemType with + | TVar _ + | TString + | TChar -> false + | _ -> true + patterns + |> List.exists (fun pattern -> + match pattern with + | PUnit -> isKnownMismatch TUnit + | PInt64 _ -> isKnownMismatch TInt64 + | PInt128Literal _ -> isKnownMismatch TInt128 + | PInt8Literal _ -> isKnownMismatch TInt8 + | PInt16Literal _ -> isKnownMismatch TInt16 + | PInt32Literal _ -> isKnownMismatch TInt32 + | PUInt8Literal _ -> isKnownMismatch TUInt8 + | PUInt16Literal _ -> isKnownMismatch TUInt16 + | PUInt32Literal _ -> isKnownMismatch TUInt32 + | PUInt64Literal _ -> isKnownMismatch TUInt64 + | PUInt128Literal _ -> isKnownMismatch TUInt128 + | PBool _ -> isKnownMismatch TBool + | PString _ -> isKnownStringPatternMismatch () + | PChar _ -> isKnownMismatch TChar + | PFloat _ -> isKnownMismatch TFloat64 + | _ -> false) + match scrutinee' with + | ListLiteral scrutineeElements + when allowNoMatchForKnownListLengthMismatch + && hasDefiniteLiteralTypeMismatch + && List.length scrutineeElements <> List.length patterns -> + let valueText = formatListLiteralForNoMatch scrutineeElements + Error (GenericError $"No match for {valueText}") + | _ -> + // Each element pattern binds variables of the list's element type + patterns + |> List.map (fun p -> + extractPatternBindings p elemType allowNoMatchForKnownListLengthMismatch) + |> List.fold (fun acc res -> + match acc, res with + | Ok bindings, Ok newBindings -> Ok (bindings @ newBindings) + | Error e, _ -> Error e + | _, Error e -> Error e) (Ok []) + | TVar patternTypeVar -> + let unresolvedElemType = TVar $"__list_elem_{patternTypeVar}" + patterns + |> List.map (fun p -> + extractPatternBindings p unresolvedElemType allowNoMatchForKnownListLengthMismatch) + |> List.fold (fun acc res -> + match acc, res with + | Ok bindings, Ok newBindings -> Ok (bindings @ newBindings) + | Error e, _ -> Error e + | _, Error e -> Error e) (Ok []) + | TRuntimeError -> + let unresolvedElemType = TVar "__list_elem_runtime_error" + patterns + |> List.map (fun p -> + extractPatternBindings p unresolvedElemType allowNoMatchForKnownListLengthMismatch) + |> List.fold (fun acc res -> + match acc, res with + | Ok bindings, Ok newBindings -> Ok (bindings @ newBindings) + | Error e, _ -> Error e + | _, Error e -> Error e) (Ok []) + | _ -> + let valueText = + match formatPatternMismatchValue scrutinee' with + | Some text -> text + | None -> "" + let message = + $"Cannot match {typeToString resolvedPatternType} value {valueText} with a List pattern" + Error (GenericError message) + | PListCons (headPatterns, tailPattern) -> + let resolvedPatternType = resolveType aliasReg patternType + match resolvedPatternType with + | TList elemType -> + // Head patterns bind to element type + let headBindings = + headPatterns + |> List.map (fun p -> + extractPatternBindings p elemType allowNoMatchForKnownListLengthMismatch) + |> List.fold (fun acc res -> + match acc, res with + | Ok bindings, Ok newBindings -> Ok (bindings @ newBindings) + | Error e, _ -> Error e + | _, Error e -> Error e) (Ok []) + // Tail pattern binds to List + let tailBindings = + extractPatternBindings + tailPattern + (TList elemType) + allowNoMatchForKnownListLengthMismatch + match headBindings, tailBindings with + | Ok hb, Ok tb -> Ok (hb @ tb) + | Error e, _ -> Error e + | _, Error e -> Error e + | TVar patternTypeVar -> + let unresolvedElemType = TVar $"__list_elem_{patternTypeVar}" + let headBindings = + headPatterns + |> List.map (fun p -> + extractPatternBindings p unresolvedElemType allowNoMatchForKnownListLengthMismatch) + |> List.fold (fun acc res -> + match acc, res with + | Ok bindings, Ok newBindings -> Ok (bindings @ newBindings) + | Error e, _ -> Error e + | _, Error e -> Error e) (Ok []) + let tailBindings = + extractPatternBindings + tailPattern + (TList unresolvedElemType) + allowNoMatchForKnownListLengthMismatch + match headBindings, tailBindings with + | Ok hb, Ok tb -> Ok (hb @ tb) + | Error e, _ -> Error e + | _, Error e -> Error e + | TRuntimeError -> + let unresolvedElemType = TVar "__list_elem_runtime_error" + let headBindings = + headPatterns + |> List.map (fun p -> + extractPatternBindings p unresolvedElemType allowNoMatchForKnownListLengthMismatch) + |> List.fold (fun acc res -> + match acc, res with + | Ok bindings, Ok newBindings -> Ok (bindings @ newBindings) + | Error e, _ -> Error e + | _, Error e -> Error e) (Ok []) + let tailBindings = + extractPatternBindings + tailPattern + (TList unresolvedElemType) + allowNoMatchForKnownListLengthMismatch + match headBindings, tailBindings with + | Ok hb, Ok tb -> Ok (hb @ tb) + | Error e, _ -> Error e + | _, Error e -> Error e + | _ -> + let valueText = + match formatPatternMismatchValue scrutinee' with + | Some text -> text + | None -> "" + let message = + $"Cannot match {typeToString resolvedPatternType} value {valueText} with a List pattern" + Error (GenericError message) + + let rec patternBindingNames (pattern: Pattern) : string list = + match pattern with + | PUnit + | PWildcard + | PInt64 _ + | PInt128Literal _ + | PInt8Literal _ + | PInt16Literal _ + | PInt32Literal _ + | PUInt8Literal _ + | PUInt16Literal _ + | PUInt32Literal _ + | PUInt64Literal _ + | PUInt128Literal _ + | PBool _ + | PString _ + | PChar _ + | PFloat _ -> + [] + | PVar name -> + [name] + | PConstructor (_, payloadOpt) -> + match payloadOpt with + | Some payloadPattern -> patternBindingNames payloadPattern + | None -> [] + | PTuple patterns + | PList patterns -> + patterns |> List.collect patternBindingNames + | PRecord (_, fieldPatterns) -> + fieldPatterns |> List.collect (fun (_, fieldPattern) -> patternBindingNames fieldPattern) + | PListCons (headPatterns, tailPattern) -> + (headPatterns |> List.collect patternBindingNames) @ patternBindingNames tailPattern + + let duplicatePatternBindings (pattern: Pattern) : string list = + patternBindingNames pattern + |> List.countBy id + |> List.choose (fun (name, count) -> if count > 1 then Some name else None) + |> List.sort + + let formatBindingSet (bindingSet: Set) : string = + bindingSet + |> Set.toList + |> List.sort + |> String.concat ", " + + let validatePatternGroupBindings (patterns: NonEmptyList) : Result = + let allPatterns = NonEmptyList.toList patterns + + let rec loop (remaining: Pattern list) (expectedBindings: Set option) : Result = + match remaining with + | [] -> Ok () + | pattern :: rest -> + let duplicates = duplicatePatternBindings pattern + if warningSettings.WarnOnDuplicatePatternBindings + && not (List.isEmpty duplicates) then + let duplicateNames = String.concat ", " duplicates + Error (GenericError $"Duplicate pattern bindings are not allowed: {duplicateNames}") + else + let bindings = collectPatternBindings pattern + match expectedBindings with + | None -> loop rest (Some bindings) + | Some expected when expected = bindings -> + loop rest expectedBindings + | Some expected -> + let expectedText = formatBindingSet expected + let actualText = formatBindingSet bindings + if warningSettings.WarnOnDuplicatePatternBindings then + Error ( + GenericError + $"Pattern matches require all branches to provide the same variables - expected [{expectedText}], got [{actualText}]" + ) + else + Error ( + GenericError + $"Pattern grouping requires complete bindings in every alternative: expected [{expectedText}], got [{actualText}]" + ) + + loop allPatterns None + + let allowNoMatchForKnownListLengthMismatchInThisMatch = List.length cases = 1 + + let rec patternAlwaysMatchesType (pattern: Pattern) (patternType: Type) : bool = + let resolvedPatternType = resolveType aliasReg patternType + match pattern, resolvedPatternType with + | PWildcard, _ + | PVar _, _ -> + true + | PUnit, TUnit -> + true + | PTuple patterns, TTuple elementTypes when List.length patterns = List.length elementTypes -> + List.zip patterns elementTypes + |> List.forall (fun (innerPattern, innerType) -> + patternAlwaysMatchesType innerPattern innerType) + | _ -> + false + + let variantNamesMatch (leftName: string) (rightName: string) : bool = + leftName = rightName + || leftName.EndsWith($".{rightName}") + || rightName.EndsWith($".{leftName}") + + let rec combinePatternMatchStatuses (statuses: bool option list) : bool option = + if statuses |> List.exists (fun status -> status = Some false) then + Some false + elif statuses |> List.forall (fun status -> status = Some true) then + Some true + else + None + + let rec patternDefinitelyMatchesExpr (pattern: Pattern) (valueExpr: Expr) : bool option = + match pattern, valueExpr with + | PWildcard, _ + | PVar _, _ -> + Some true + | PUnit, UnitLiteral -> + Some true + | PInt64 expected, Int64Literal actual -> + Some (expected = actual) + | PInt128Literal expected, Int128Literal actual -> + Some (expected = actual) + | PInt8Literal expected, Int8Literal actual -> + Some (expected = actual) + | PInt16Literal expected, Int16Literal actual -> + Some (expected = actual) + | PInt32Literal expected, Int32Literal actual -> + Some (expected = actual) + | PUInt8Literal expected, UInt8Literal actual -> + Some (expected = actual) + | PUInt16Literal expected, UInt16Literal actual -> + Some (expected = actual) + | PUInt32Literal expected, UInt32Literal actual -> + Some (expected = actual) + | PUInt64Literal expected, UInt64Literal actual -> + Some (expected = actual) + | PUInt128Literal expected, UInt128Literal actual -> + Some (expected = actual) + | PBool expected, BoolLiteral actual -> + Some (expected = actual) + | PString expected, StringLiteral actual -> + Some (expected = actual) + | PChar expected, CharLiteral actual -> + Some (expected = actual) + | PFloat expected, FloatLiteral actual -> + Some (expected = actual) + | PTuple patterns, TupleLiteral values -> + if List.length patterns <> List.length values then + Some false + else + List.zip patterns values + |> List.map (fun (innerPattern, innerValue) -> + patternDefinitelyMatchesExpr innerPattern innerValue) + |> combinePatternMatchStatuses + | PList patterns, ListLiteral values -> + if List.length patterns <> List.length values then + Some false + else + List.zip patterns values + |> List.map (fun (innerPattern, innerValue) -> + patternDefinitelyMatchesExpr innerPattern innerValue) + |> combinePatternMatchStatuses + | PListCons (headPatterns, tailPattern), ListLiteral values -> + if List.length values < List.length headPatterns then + Some false + else + let headValues = values |> List.take (List.length headPatterns) + let tailValues = values |> List.skip (List.length headPatterns) + let headStatuses = + List.zip headPatterns headValues + |> List.map (fun (innerPattern, innerValue) -> + patternDefinitelyMatchesExpr innerPattern innerValue) + let tailStatus = patternDefinitelyMatchesExpr tailPattern (ListLiteral tailValues) + combinePatternMatchStatuses (headStatuses @ [tailStatus]) + | PConstructor (patternVariantName, patternPayload), Constructor (_, valueVariantName, valuePayload) -> + if not (variantNamesMatch patternVariantName valueVariantName) then + Some false + else + match patternPayload, valuePayload with + | None, None -> + Some true + | Some patternPayloadExpr, Some valuePayloadExpr -> + patternDefinitelyMatchesExpr patternPayloadExpr valuePayloadExpr + | _ -> + Some false + | _ -> + None + + let knownCaseMatchStatus (matchCase: MatchCase) : bool option = + match matchCase.Guard with + | Some _ -> + None + | None -> + let statuses = + matchCase.Patterns + |> NonEmptyList.toList + |> List.map (fun pattern -> + if patternAlwaysMatchesType pattern scrutineeType then + Some true + else + patternDefinitelyMatchesExpr pattern scrutinee') + if statuses |> List.exists (fun status -> status = Some true) then + Some true + elif statuses |> List.forall (fun status -> status = Some false) then + Some false + else + None + + let rec patternIsBinderOnly (pattern: Pattern) : bool = + match pattern with + | PVar _ + | PWildcard -> + true + | PTuple patterns + | PList patterns -> + patterns |> List.forall patternIsBinderOnly + | PListCons (headPatterns, tailPattern) -> + (headPatterns |> List.forall patternIsBinderOnly) + && patternIsBinderOnly tailPattern + | _ -> + false + + let caseCanShortCircuit (matchCase: MatchCase) : bool = + Option.isNone matchCase.Guard + && ( + matchCase.Patterns + |> NonEmptyList.toList + |> List.forall patternIsBinderOnly + ) + + // Type check each case and ensure they all return the same type + // Returns (resultType, transformedCases) + let rec checkCases (remaining: MatchCase list) (resultType: Type option) (accCases: MatchCase list) : Result = + match remaining with + | [] -> + match resultType with + | Some t -> Ok (t, List.rev accCases) + | None -> Error (GenericError "Match expression must have at least one case") + | matchCase :: rest -> + let caseMatchStatus = knownCaseMatchStatus matchCase + validatePatternGroupBindings matchCase.Patterns + |> Result.bind (fun () -> + // Extract bindings from first pattern after validation. + let firstPattern = NonEmptyList.head matchCase.Patterns + let allowNoMatchForKnownListLengthMismatch = + allowNoMatchForKnownListLengthMismatchInThisMatch + && List.isEmpty matchCase.Patterns.Tail + extractPatternBindings + firstPattern + scrutineeType + allowNoMatchForKnownListLengthMismatch + |> Result.bind (fun bindings -> + let caseEnv = List.fold (fun e (name, ty) -> Map.add name ty e) env bindings + // Type check guard if present (must be Bool) + let guardResult = + match matchCase.Guard with + | None -> Ok None + | Some guardExpr -> + let checkedGuardResult = + checkExpr + guardExpr + caseEnv + typeReg + variantLookup + genericFuncReg + warningSettings + moduleRegistry + aliasReg + (Some TBool) + let normalizedGuardResult = + match checkedGuardResult with + | Error (UndefinedVariable name) -> + Error (UndefinedCallTarget name) + | _ -> + checkedGuardResult + normalizedGuardResult + |> Result.bind (fun (guardType, guard') -> + if guardType = TBool then + Ok (Some guard') + else + Error (TypeMismatch (TBool, guardType, "guard clause"))) + guardResult + |> Result.bind (fun guard' -> + let checkedBodyResult = + checkExpr + matchCase.Body + caseEnv + typeReg + variantLookup + genericFuncReg + warningSettings + moduleRegistry + aliasReg + resultType + let normalizedBodyResult = + match resultType, checkedBodyResult with + | Some expectedBodyType, Error (TypeMismatch (expectedTypeFromContext, _, mismatchContext)) + when expectedTypeFromContext = expectedBodyType + && mismatchContext = "boolean literal" -> + // Retry unconstrained so we can report mismatch against + // the case result type ("match body"), not literal context. + checkExpr + matchCase.Body + caseEnv + typeReg + variantLookup + genericFuncReg + warningSettings + moduleRegistry + aliasReg + None + | _ -> + checkedBodyResult + normalizedBodyResult + |> Result.bind (fun (bodyType, body') -> + let newCase = { Patterns = matchCase.Patterns; Guard = guard'; Body = body' } + let shouldShortCircuit = + caseMatchStatus = Some true + && caseCanShortCircuit matchCase + match resultType with + | None -> + if shouldShortCircuit then + Ok (bodyType, List.rev (newCase :: accCases)) + else + checkCases rest (Some bodyType) (newCase :: accCases) + | Some expected -> + // Use reconcileTypes to handle type variables and type aliases + match reconcileTypes (Some aliasReg) expected bodyType with + | Some reconciledType -> + // Update resultType to the reconciled (concrete) type + if shouldShortCircuit then + Ok (reconciledType, List.rev (newCase :: accCases)) + else + checkCases rest (Some reconciledType) (newCase :: accCases) + | None -> + Error (TypeMismatch (expected, bodyType, "match body")))))) + + // Pass expectedType to first case so empty lists, None, etc. get the right type + checkCases cases expectedType [] + |> Result.bind (fun (matchType, cases') -> + match expectedType with + | Some expected -> + // Use reconcileTypes for expected type check too + match reconcileTypes (Some aliasReg) expected matchType with + | Some reconciledType -> Ok (reconciledType, Match (scrutinee', cases')) + | None -> Error (TypeMismatch (expected, matchType, "match expression")) + | None -> Ok (matchType, Match (scrutinee', cases')))) + + | ListLiteral elements -> + // Type-check elements and infer element type from first element + match elements with + | [] -> + // Empty list: use expected list type or keep a type variable + match expectedType with + | Some (TList elemType) -> Ok (TList elemType, ListLiteral []) + | Some other -> Error (TypeMismatch (other, TList (TVar "t"), "empty list")) + | None -> Ok (TList (TVar "t"), ListLiteral []) + | first :: rest -> + // Use expected list element type for the first element when available, so + // lambda/list literals in expected contexts reconcile type variables consistently. + let firstExpectedType = + match expectedType with + | Some (TList expectedElemType) -> Some expectedElemType + | _ -> None + checkExpr first env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg firstExpectedType + |> Result.bind (fun (elemType, first') -> + // Check remaining elements match the inferred type + let rec checkRest remaining acc = + match remaining with + | [] -> Ok (List.rev acc) + | e :: rs -> + checkExpr e env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some elemType) + |> Result.bind (fun (eType, e') -> + if eType = elemType then checkRest rs (e' :: acc) + else Error (TypeMismatch (elemType, eType, "list element"))) + checkRest rest [first'] + |> Result.bind (fun elements' -> + let listType = TList elemType + match expectedType with + | Some expected -> + // Use reconcileTypes to allow type variables to unify and resolve type aliases + match reconcileTypes (Some aliasReg) expected listType with + | Some reconciledType -> Ok (reconciledType, ListLiteral elements') + | None -> Error (TypeMismatch (expected, listType, "list literal")) + | None -> Ok (listType, ListLiteral elements'))) + + | ListCons (headElements, tail) -> + // Type-check tail first to get element type + // Pass expected type to tail if it's a list type + let tailExpectedType = + match expectedType with + | Some (TList _) -> expectedType + | _ -> None + checkExpr tail env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg tailExpectedType + |> Result.bind (fun (tailType, tail') -> + match tailType with + | TList elemType -> + // Type-check each head element with the inferred element type + // Track the most concrete element type as we process elements + let rec checkHeads elems currentElemType acc = + match elems with + | [] -> Ok (currentElemType, List.rev acc) + | h :: rest -> + checkExpr h env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some currentElemType) + |> Result.bind (fun (hType, h') -> + // Use reconcileTypes to allow type variables to unify with concrete types + match reconcileTypes (Some aliasReg) currentElemType hType with + | None -> Error (TypeMismatch (currentElemType, hType, "list cons element")) + | Some reconciledElemType -> checkHeads rest reconciledElemType (h' :: acc)) + checkHeads headElements elemType [] + |> Result.bind (fun (finalElemType, heads') -> + let listType = TList finalElemType + match expectedType with + | Some expected -> + // Use reconcileTypes to allow type variables to unify with concrete types + match reconcileTypes (Some aliasReg) expected listType with + | None -> Error (TypeMismatch (expected, listType, "list cons")) + | Some reconciledType -> Ok (reconciledType, ListCons (heads', tail')) + | None -> Ok (listType, ListCons (heads', tail'))) + | other -> Error (TypeMismatch (TList (TVar "t"), other, "list cons tail must be a list"))) + + | Lambda (parameters, body) -> + let parametersList = NonEmptyList.toList parameters + let typeCheckLambdaWithParams + (resolvedParams: (string * Type) list) + (bodyExpectedType: Type option) + : Result = + let paramEnv = + resolvedParams + |> List.fold (fun e (name, ty) -> Map.add name ty e) env + checkExpr body paramEnv typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg bodyExpectedType + |> Result.map (fun (bodyType, body') -> + let paramTypes = resolvedParams |> List.map snd + (TFunction (paramTypes, bodyType), Lambda (toLambdaParams resolvedParams, body'))) + + match expectedType with + | Some (TFunction (expectedParams, expectedRet)) -> + if List.length expectedParams <> List.length parametersList then + let declaredParamTypes = parametersList |> List.map snd + let declaredFuncType = TFunction (declaredParamTypes, TVar "r") + Error (TypeMismatch (TFunction (expectedParams, expectedRet), declaredFuncType, "lambda parameter count")) + else + let rec reconcileParamTypes + (remaining: ((string * Type) * Type) list) + (acc: (string * Type) list) + : Result<(string * Type) list, TypeError> = + match remaining with + | [] -> Ok (List.rev acc) + | ((name, declaredParamType), expectedParamType) :: rest -> + match reconcileTypes (Some aliasReg) declaredParamType expectedParamType with + | Some reconciledParamType -> + reconcileParamTypes rest ((name, reconciledParamType) :: acc) + | None -> + Error (TypeMismatch (expectedParamType, declaredParamType, "lambda parameter type")) + + reconcileParamTypes (List.zip parametersList expectedParams) [] + |> Result.bind (fun reconciledParams -> + let bodyExpectedType = + if containsTVar expectedRet then + None + else + Some expectedRet + typeCheckLambdaWithParams reconciledParams bodyExpectedType + |> Result.bind (fun (funcType, lambdaExpr) -> + match funcType with + | TFunction (paramTypes, bodyType) -> + match reconcileTypes (Some aliasReg) expectedRet bodyType with + | None -> + Error (TypeMismatch (expectedRet, bodyType, "lambda return type")) + | Some reconciledRetType -> + Ok (TFunction (paramTypes, reconciledRetType), lambdaExpr) + | _ -> + Error (GenericError "Internal error: lambda did not type-check to a function"))) + | Some other -> + typeCheckLambdaWithParams parametersList None + |> Result.bind (fun (funcType, lambdaExpr) -> + match reconcileTypes (Some aliasReg) other funcType with + | Some reconciledType -> Ok (reconciledType, lambdaExpr) + | None -> Error (TypeMismatch (other, funcType, "lambda"))) + | None -> + typeCheckLambdaWithParams parametersList None + + | Apply (func, args) -> + let argsList = NonEmptyList.toList args + // Type-check the function expression + checkExpr func env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg None + |> Result.bind (fun (funcType, func') -> + match funcType with + | TFunction (paramTypes, returnType) -> + let numParams = List.length paramTypes + let argsList = normalizeNullaryCallArgs numParams argsList + let numArgs = List.length argsList + // Check argument count - allow partial application + if numArgs > numParams then + Error (GenericError $"Function expects {numParams} arguments, got {numArgs}") + else if numArgs < numParams then + // Partial application of lambda/function value + let providedParamTypes = List.take numArgs paramTypes + let remainingParamTypes = List.skip numArgs paramTypes + + // Type-check the provided arguments + let rec checkProvidedArgs (argExprs: Expr list) (paramTys: Type list) (checkedArgs: Expr list) : Result = + match argExprs, paramTys with + | [], [] -> Ok (List.rev checkedArgs) + | arg :: restArgs, paramTy :: restParams -> + checkExpr arg env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some paramTy) + |> Result.bind (fun (argType, arg') -> + if typesEqual aliasReg argType paramTy then + checkProvidedArgs restArgs restParams (arg' :: checkedArgs) + else + Error (TypeMismatch (paramTy, argType, "function argument"))) + | _ -> Error (GenericError "Argument count mismatch") + + checkProvidedArgs argsList providedParamTypes [] + |> Result.bind (fun args' -> + // Create fresh parameter names for the remaining parameters + // Use "lambda" as identifier since we're applying a function value, not a named function + let remainingParams = makePartialParams "lambda" remainingParamTypes + + // Create the lambda body: apply the original function with all args + let allArgs = args' @ (remainingParams |> List.map (fun (name, _) -> Var name)) + let lambdaBody = Apply (func', toCallArgs allArgs) + + // Create the lambda: (p0, p1, ...) => func(providedArgs, p0, p1, ...) + let lambdaExpr = Lambda (toLambdaParams remainingParams, lambdaBody) + + // The resulting type is a function from remaining params to return type + let partialType = TFunction (remainingParamTypes, returnType) + + match expectedType with + | Some expected when not (typesEqual aliasReg expected partialType) -> + Error (TypeMismatch (expected, partialType, "partial application")) + | _ -> Ok (partialType, lambdaExpr)) + else + // Check each argument against expected param type + let rec checkArgs (argExprs: Expr list) (paramTys: Type list) (checkedArgs: Expr list) : Result = + match argExprs, paramTys with + | [], [] -> Ok (List.rev checkedArgs) + | arg :: restArgs, paramTy :: restParams -> + checkExpr arg env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some paramTy) + |> Result.bind (fun (argType, arg') -> + if typesEqual aliasReg argType paramTy then + checkArgs restArgs restParams (arg' :: checkedArgs) + else + Error (TypeMismatch (paramTy, argType, "function argument"))) + | _ -> Error (GenericError "Argument count mismatch") + checkArgs argsList paramTypes [] + |> Result.bind (fun args' -> + match expectedType with + | Some expected when not (typesEqual aliasReg expected returnType) -> + Error (TypeMismatch (expected, returnType, "function application result")) + | _ -> Ok (returnType, Apply (func', toCallArgs args'))) + | _ -> + Error (GenericError $"Cannot apply non-function type: {typeToString funcType}")) + + | FuncRef funcName -> + // Function reference: look up function signature + match Map.tryFind funcName env with + | Some funcType -> + match expectedType with + | Some expected when expected <> funcType -> + Error (TypeMismatch (expected, funcType, $"function reference {funcName}")) + | _ -> Ok (funcType, expr) + | None -> + Error (UndefinedVariable funcName) + + | Closure (funcName, captures) -> + // Closure: function with captured values + // The closure has the same type as the underlying function (minus closure param) + // For now, just check the captures and return function type + let checkCapture (cap: Expr) : Result = + checkExpr cap env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg None + |> Result.map snd + let rec checkCaptures (caps: Expr list) (acc: Expr list) : Result = + match caps with + | [] -> Ok (List.rev acc) + | cap :: rest -> + checkCapture cap |> Result.bind (fun cap' -> checkCaptures rest (cap' :: acc)) + checkCaptures captures [] + |> Result.bind (fun captures' -> + // Look up closure function type + match Map.tryFind funcName env with + | Some (TFunction (_ :: restParams, returnType)) -> + // The closure type is the function type without the closure param + let closureType = TFunction (restParams, returnType) + match expectedType with + | Some expected when expected <> closureType -> + Error (TypeMismatch (expected, closureType, $"closure {funcName}")) + | _ -> Ok (closureType, Closure (funcName, captures')) + | Some funcType -> Ok (funcType, Closure (funcName, captures')) + | None -> Error (UndefinedVariable funcName)) + +type private EqHelperExprMode = + | ExpandCurrent + | UseHelperCall + +let private makeSimpleMatchCase (pattern: Pattern) (body: Expr) : MatchCase = + { Patterns = NonEmptyList.singleton pattern + Guard = None + Body = body } + +let rec private buildEqHelperExpr + (aliasReg: AliasRegistry) + (typeReg: TypeRegistry) + (variantLookup: VariantLookup) + (mode: EqHelperExprMode) + (typ: Type) + (leftExpr: Expr) + (rightExpr: Expr) + : Expr = + let resolvedType = resolveType aliasReg typ + + match (mode, resolvedType) with + | UseHelperCall, helperType when needsEqHelperForResolvedType variantLookup helperType -> + Call (eqHelperName helperType, NonEmptyList.fromList [leftExpr; rightExpr]) + + | _, TFunction _ -> + // Preserve side effects/runtime errors by evaluating both sides. + Let ("__dark_eq_helper_fn_pair", TupleLiteral [leftExpr; rightExpr], BoolLiteral true) + + | _, TList elemType -> + let resolvedElemType = resolveType aliasReg elemType + match resolvedElemType with + | TFunction _ -> + // Function-value equality is normalized to true, so list equality on + // function elements reduces to length equality. + let pairVar = "__dark_eq_helper_list_pair" + let leftListExpr = TupleAccess (Var pairVar, 0) + let rightListExpr = TupleAccess (Var pairVar, 1) + Let ( + pairVar, + TupleLiteral [leftExpr; rightExpr], + BinOp ( + Eq, + TypeApp ("Stdlib.List.length", [resolvedElemType], NonEmptyList.singleton leftListExpr), + TypeApp ("Stdlib.List.length", [resolvedElemType], NonEmptyList.singleton rightListExpr) + ) + ) + | _ -> + TypeApp ("Stdlib.List.equals", [resolvedElemType], NonEmptyList.fromList [leftExpr; rightExpr]) + + | _, TString -> + Call ("Stdlib.String.equals", NonEmptyList.fromList [leftExpr; rightExpr]) + + | ExpandCurrent, TTuple elemTypes -> + let leftTupleVar = "__dark_eq_helper_tuple_left" + let rightTupleVar = "__dark_eq_helper_tuple_right" + let elementComparisons = + elemTypes + |> List.mapi (fun index elemType -> + buildEqHelperExpr + aliasReg + typeReg + variantLookup + UseHelperCall + elemType + (TupleAccess (Var leftTupleVar, index)) + (TupleAccess (Var rightTupleVar, index))) + Let (leftTupleVar, leftExpr, Let (rightTupleVar, rightExpr, chainAndExpr elementComparisons)) + + | ExpandCurrent, TRecord (recordTypeName, typeArgs) -> + match Map.tryFind recordTypeName typeReg with + | None -> + BinOp (Eq, leftExpr, rightExpr) + | Some fields -> + let concreteFields = + match buildRecordFieldSubstitution fields typeArgs with + | Ok subst -> + fields |> List.map (fun (name, fieldType) -> (name, resolveType aliasReg (applySubst subst fieldType))) + | Error _ -> + fields |> List.map (fun (name, fieldType) -> (name, resolveType aliasReg fieldType)) + + let leftRecordVar = "__dark_eq_helper_record_left" + let rightRecordVar = "__dark_eq_helper_record_right" + let fieldComparisons = + concreteFields + |> List.mapi (fun index (_, fieldType) -> + buildEqHelperExpr + aliasReg + typeReg + variantLookup + UseHelperCall + fieldType + (TupleAccess (Var leftRecordVar, index)) + (TupleAccess (Var rightRecordVar, index))) + Let (leftRecordVar, leftExpr, Let (rightRecordVar, rightExpr, chainAndExpr fieldComparisons)) + + | ExpandCurrent, TSum (sumTypeName, sumTypeArgs) -> + if not (sumTypeHasPayload variantLookup sumTypeName) then + BinOp (Eq, leftExpr, rightExpr) + else + let variantsForType = + variantLookup + |> Map.toList + |> List.choose (fun (variantName, (variantTypeName, typeParams, tag, payloadOpt)) -> + if variantTypeName = sumTypeName then + let concretePayloadOpt = + match payloadOpt with + | Some payloadType when List.length typeParams = List.length sumTypeArgs -> + let subst = List.zip typeParams sumTypeArgs |> Map.ofList + Some (resolveType aliasReg (applySubst subst payloadType)) + | Some payloadType -> + Some (resolveType aliasReg payloadType) + | None -> + None + Some (variantName, tag, concretePayloadOpt) + else + None) + |> List.sortBy (fun (_, tag, _) -> tag) + + let variantCases = + variantsForType + |> List.map (fun (variantName, tag, payloadTypeOpt) -> + match payloadTypeOpt with + | None -> + let pairPattern = + PTuple [PConstructor (variantName, None); PConstructor (variantName, None)] + makeSimpleMatchCase pairPattern (BoolLiteral true) + | Some payloadType -> + let leftPayloadVar = $"__dark_eq_helper_left_payload_{tag}" + let rightPayloadVar = $"__dark_eq_helper_right_payload_{tag}" + let payloadEqExpr = + buildEqHelperExpr + aliasReg + typeReg + variantLookup + UseHelperCall + payloadType + (Var leftPayloadVar) + (Var rightPayloadVar) + let pairPattern = + PTuple [ + PConstructor (variantName, Some (PVar leftPayloadVar)) + PConstructor (variantName, Some (PVar rightPayloadVar)) + ] + makeSimpleMatchCase pairPattern payloadEqExpr) + + let defaultCase = makeSimpleMatchCase PWildcard (BoolLiteral false) + let sumPairVar = "__dark_eq_helper_sum_pair" + Let (sumPairVar, TupleLiteral [leftExpr; rightExpr], Match (Var sumPairVar, variantCases @ [defaultCase])) + + | _, _ -> + BinOp (Eq, leftExpr, rightExpr) + +let private collectDirectEqHelperDeps + (aliasReg: AliasRegistry) + (typeReg: TypeRegistry) + (variantLookup: VariantLookup) + (typ: Type) + : Type list = + let addIfHelperType (candidate: Type) : Type option = + let resolved = resolveType aliasReg candidate + if needsEqHelperForResolvedType variantLookup resolved then Some resolved else None + + let resolvedType = resolveType aliasReg typ + let deps = + match resolvedType with + | TTuple elemTypes -> + elemTypes |> List.choose addIfHelperType + | TRecord (recordTypeName, typeArgs) -> + match Map.tryFind recordTypeName typeReg with + | None -> + [] + | Some fields -> + let concreteFields = + match buildRecordFieldSubstitution fields typeArgs with + | Ok subst -> + fields |> List.map (fun (_, fieldType) -> resolveType aliasReg (applySubst subst fieldType)) + | Error _ -> + fields |> List.map (fun (_, fieldType) -> resolveType aliasReg fieldType) + concreteFields |> List.choose addIfHelperType + | TSum (sumTypeName, sumTypeArgs) -> + variantLookup + |> Map.toList + |> List.choose (fun (_, (variantTypeName, typeParams, _, payloadOpt)) -> + if variantTypeName = sumTypeName then + match payloadOpt with + | Some payloadType when List.length typeParams = List.length sumTypeArgs -> + let subst = List.zip typeParams sumTypeArgs |> Map.ofList + addIfHelperType (applySubst subst payloadType) + | Some payloadType -> + addIfHelperType payloadType + | None -> + None + else + None) + | _ -> + [] + deps |> List.distinctBy eqHelperName + +type private EqHelperGenerationState = { + InProgress: Set + Generated: Map +} + +let rec private ensureEqHelperForType + (aliasReg: AliasRegistry) + (typeReg: TypeRegistry) + (variantLookup: VariantLookup) + (typ: Type) + (state: EqHelperGenerationState) + : EqHelperGenerationState = + let resolvedType = resolveType aliasReg typ + if not (needsEqHelperForResolvedType variantLookup resolvedType) then + state + else + let helper = eqHelperName resolvedType + if Map.containsKey helper state.Generated || Set.contains helper state.InProgress then + state + else + let stateInProgress = { state with InProgress = Set.add helper state.InProgress } + let deps = collectDirectEqHelperDeps aliasReg typeReg variantLookup resolvedType + let stateWithDeps = + deps + |> List.fold + (fun currentState depType -> + ensureEqHelperForType aliasReg typeReg variantLookup depType currentState) + stateInProgress + + let leftParam = "__dark_eq_left" + let rightParam = "__dark_eq_right" + let helperBody = + buildEqHelperExpr + aliasReg + typeReg + variantLookup + ExpandCurrent + resolvedType + (Var leftParam) + (Var rightParam) + + let helperDef : FunctionDef = { + Name = helper + TypeParams = [] + Params = NonEmptyList.fromList [ (leftParam, resolvedType); (rightParam, resolvedType) ] + ReturnType = TBool + Body = helperBody + } + + { + InProgress = Set.remove helper stateWithDeps.InProgress + Generated = Map.add helper helperDef stateWithDeps.Generated + } + +let rec private collectEqHelperTypesFromExpr (aliasReg: AliasRegistry) (expr: Expr) : Set = + let collectFromExprs (exprs: Expr list) : Set = + exprs + |> List.map (collectEqHelperTypesFromExpr aliasReg) + |> List.fold Set.union Set.empty + + match expr with + | UnitLiteral | Int64Literal _ | Int128Literal _ | Int8Literal _ | Int16Literal _ | Int32Literal _ + | UInt8Literal _ | UInt16Literal _ | UInt32Literal _ | UInt64Literal _ | UInt128Literal _ + | BoolLiteral _ | StringLiteral _ | CharLiteral _ | FloatLiteral _ | Var _ | FuncRef _ -> + Set.empty + | BinOp (_, left, right) -> + Set.union (collectEqHelperTypesFromExpr aliasReg left) (collectEqHelperTypesFromExpr aliasReg right) + | UnaryOp (_, inner) -> + collectEqHelperTypesFromExpr aliasReg inner + | Let (_, value, body) -> + Set.union (collectEqHelperTypesFromExpr aliasReg value) (collectEqHelperTypesFromExpr aliasReg body) + | If (cond, thenBranch, elseBranch) -> + Set.union + (collectEqHelperTypesFromExpr aliasReg cond) + (Set.union + (collectEqHelperTypesFromExpr aliasReg thenBranch) + (collectEqHelperTypesFromExpr aliasReg elseBranch)) + | Call (_, args) -> + collectFromExprs (NonEmptyList.toList args) + | TypeApp (_, _, args) as typeAppExpr -> + match tryDecodeInternalTypeApp typeAppExpr with + | Some (EqHelperDispatchTypeApp (targetType, leftExpr, rightExpr)) -> + Set.add + (resolveType aliasReg targetType) + (Set.union + (collectEqHelperTypesFromExpr aliasReg leftExpr) + (collectEqHelperTypesFromExpr aliasReg rightExpr)) + | None -> + collectFromExprs (NonEmptyList.toList args) + | TupleLiteral elements -> + collectFromExprs elements + | TupleAccess (tupleExpr, _) -> + collectEqHelperTypesFromExpr aliasReg tupleExpr + | RecordLiteral (_, fields) -> + fields |> List.map snd |> collectFromExprs + | RecordUpdate (recordExpr, updates) -> + Set.union + (collectEqHelperTypesFromExpr aliasReg recordExpr) + (updates |> List.map snd |> collectFromExprs) + | RecordAccess (recordExpr, _) -> + collectEqHelperTypesFromExpr aliasReg recordExpr + | Constructor (_, _, payload) -> + payload |> Option.map (collectEqHelperTypesFromExpr aliasReg) |> Option.defaultValue Set.empty + | Match (scrutinee, cases) -> + let scrutineeTypes = collectEqHelperTypesFromExpr aliasReg scrutinee + let caseTypes = + cases + |> List.map (fun matchCase -> + let guardTypes = + matchCase.Guard + |> Option.map (collectEqHelperTypesFromExpr aliasReg) + |> Option.defaultValue Set.empty + Set.union guardTypes (collectEqHelperTypesFromExpr aliasReg matchCase.Body)) + |> List.fold Set.union Set.empty + Set.union scrutineeTypes caseTypes + | ListLiteral elements -> + collectFromExprs elements + | ListCons (headElements, tailExpr) -> + Set.union (collectFromExprs headElements) (collectEqHelperTypesFromExpr aliasReg tailExpr) + | Lambda (_, body) -> + collectEqHelperTypesFromExpr aliasReg body + | Apply (funcExpr, args) -> + Set.union (collectEqHelperTypesFromExpr aliasReg funcExpr) (collectFromExprs (NonEmptyList.toList args)) + | Closure (_, captures) -> + collectFromExprs captures + | InterpolatedString parts -> + parts + |> List.choose (function + | StringText _ -> None + | StringExpr partExpr -> Some (collectEqHelperTypesFromExpr aliasReg partExpr)) + |> List.fold Set.union Set.empty + +let rec private materializeEqHelperCallsInExpr (aliasReg: AliasRegistry) (expr: Expr) : Expr = + let recurse = materializeEqHelperCallsInExpr aliasReg + + match expr with + | UnitLiteral | Int64Literal _ | Int128Literal _ | Int8Literal _ | Int16Literal _ | Int32Literal _ + | UInt8Literal _ | UInt16Literal _ | UInt32Literal _ | UInt64Literal _ | UInt128Literal _ + | BoolLiteral _ | StringLiteral _ | CharLiteral _ | FloatLiteral _ | Var _ | FuncRef _ -> + expr + | BinOp (op, left, right) -> + BinOp (op, recurse left, recurse right) + | UnaryOp (op, inner) -> + UnaryOp (op, recurse inner) + | Let (name, value, body) -> + Let (name, recurse value, recurse body) + | If (cond, thenBranch, elseBranch) -> + If (recurse cond, recurse thenBranch, recurse elseBranch) + | Call (funcName, args) -> + Call (funcName, NonEmptyList.map recurse args) + | TypeApp (funcName, typeArgs, args) as typeAppExpr -> + match tryDecodeInternalTypeApp typeAppExpr with + | Some (EqHelperDispatchTypeApp (targetType, leftExpr, rightExpr)) -> + let helperType = resolveType aliasReg targetType + Call (eqHelperName helperType, NonEmptyList.fromList [recurse leftExpr; recurse rightExpr]) + | None -> + TypeApp (funcName, typeArgs, NonEmptyList.map recurse args) + | TupleLiteral elements -> + TupleLiteral (List.map recurse elements) + | TupleAccess (tupleExpr, index) -> + TupleAccess (recurse tupleExpr, index) + | RecordLiteral (typeName, fields) -> + RecordLiteral (typeName, fields |> List.map (fun (name, fieldExpr) -> (name, recurse fieldExpr))) + | RecordUpdate (recordExpr, updates) -> + RecordUpdate (recurse recordExpr, updates |> List.map (fun (name, updateExpr) -> (name, recurse updateExpr))) + | RecordAccess (recordExpr, fieldName) -> + RecordAccess (recurse recordExpr, fieldName) + | Constructor (typeName, variantName, payload) -> + Constructor (typeName, variantName, payload |> Option.map recurse) + | Match (scrutinee, cases) -> + Match ( + recurse scrutinee, + cases + |> List.map (fun matchCase -> { + matchCase with + Guard = matchCase.Guard |> Option.map recurse + Body = recurse matchCase.Body + }) + ) + | ListLiteral elements -> + ListLiteral (List.map recurse elements) + | ListCons (headElements, tailExpr) -> + ListCons (List.map recurse headElements, recurse tailExpr) + | Lambda (parameters, body) -> + Lambda (parameters, recurse body) + | Apply (funcExpr, args) -> + Apply (recurse funcExpr, NonEmptyList.map recurse args) + | Closure (funcName, captures) -> + Closure (funcName, List.map recurse captures) + | InterpolatedString parts -> + InterpolatedString ( + parts + |> List.map (function + | StringText text -> StringText text + | StringExpr partExpr -> StringExpr (recurse partExpr)) + ) + +let private materializeEqHelpersInTopLevels + (aliasReg: AliasRegistry) + (typeReg: TypeRegistry) + (variantLookup: VariantLookup) + (topLevels: TopLevel list) + : TopLevel list = + let collectFromTopLevel (topLevel: TopLevel) : Set = + match topLevel with + | FunctionDef funcDef -> + collectEqHelperTypesFromExpr aliasReg funcDef.Body + | Expression expr -> + collectEqHelperTypesFromExpr aliasReg expr + | TypeDef _ -> + Set.empty + + let rewriteTopLevel (topLevel: TopLevel) : TopLevel = + match topLevel with + | FunctionDef funcDef -> + FunctionDef { funcDef with Body = materializeEqHelperCallsInExpr aliasReg funcDef.Body } + | Expression expr -> + Expression (materializeEqHelperCallsInExpr aliasReg expr) + | TypeDef _ -> + topLevel + + let helperTypes = + topLevels + |> List.map collectFromTopLevel + |> List.fold Set.union Set.empty + + let rewrittenTopLevels = topLevels |> List.map rewriteTopLevel + + if Set.isEmpty helperTypes then + rewrittenTopLevels + else + let initialState = { + InProgress = Set.empty + Generated = Map.empty + } + + let finalState = + helperTypes + |> Set.toList + |> List.sortBy typeToString + |> List.fold + (fun currentState helperType -> + ensureEqHelperForType aliasReg typeReg variantLookup helperType currentState) + initialState + + let helperTopLevels = + finalState.Generated + |> Map.toList + |> List.map snd + |> List.sortBy (fun helperDef -> helperDef.Name) + |> List.map FunctionDef + + helperTopLevels @ rewrittenTopLevels + +/// Type-check a function definition +/// Returns the transformed function body (with Call -> TypeApp transformations) +let checkFunctionDef + (funcParamNameReg: Map) + (funcDef: FunctionDef) + (env: TypeEnv) + (typeReg: TypeRegistry) + (variantLookup: VariantLookup) + (genericFuncReg: GenericFuncRegistry) + (warningSettings: WarningSettings) + (moduleRegistry: ModuleRegistry) + (aliasReg: AliasRegistry) + : Result = + // Build environment with parameters + let paramEnv = + funcDef.Params + |> NonEmptyList.toList + |> List.fold (fun e (name, ty) -> Map.add name ty e) env + + // Check body has return type + let bodyCheckResult = + checkExprWithParamNames + funcParamNameReg + funcDef.Body + paramEnv + typeReg + variantLookup + genericFuncReg + warningSettings + moduleRegistry + aliasReg + (Some funcDef.ReturnType) + + let bodyCheckWithLegacyInterpreterErrors = + if genericFuncReg.RequireExplicitTypeArgsForBareCalls then + bodyCheckResult + |> Result.mapError (fun err -> + match err with + | TypeMismatch (expectedType, actualType, _) when + typesCompatibleWithAliases aliasReg expectedType funcDef.ReturnType + && not (isRuntimeErrorType actualType) -> + let actualValue = + match tryFormatLiteralValue funcDef.Body with + | Some value -> value + | None -> typeToString actualType + GenericError + $"{funcDef.Name}'s return value expects {typeToString funcDef.ReturnType}, but got {typeToString actualType} ({actualValue})" + | _ -> + err) + else + bodyCheckResult + + bodyCheckWithLegacyInterpreterErrors + |> Result.bind (fun (bodyType, body') -> + let resolvedReturnType = resolveType aliasReg funcDef.ReturnType + let resolvedBodyType = resolveType aliasReg bodyType + let allowGenericReturnSpecialization = + containsTVar resolvedReturnType + && not (containsTVar resolvedBodyType) + && typesCompatibleWithAliases aliasReg resolvedReturnType resolvedBodyType + + if resolvedReturnType = resolvedBodyType || allowGenericReturnSpecialization then + Ok { funcDef with Body = body' } + else + Error (TypeMismatch (funcDef.ReturnType, bodyType, $"function {funcDef.Name} body"))) + +/// Internal: Type-check a program and return the type checking environment +/// This is the core implementation used by checkProgram, checkProgramWithEnv, and checkProgramWithBaseEnv +/// When baseEnv is provided, registries are merged with it (for separate compilation) +let private checkProgramInternal + (baseEnv: TypeCheckEnv option) + (requireExplicitTypeArgsForBareCalls: bool) + (warningSettings: WarningSettings) + (program: Program) + : Result = + let (Program topLevels) = program + + // First pass: collect all type definitions (records) from THIS program + // Note: typeParams are stored but not fully used yet (future: generic type instantiation) + let programTypeReg : TypeRegistry = + topLevels + |> List.choose (function + | TypeDef (RecordDef (name, _typeParams, fields)) -> Some (name, fields) + | _ -> None) + |> Map.ofList + + // Collect type aliases + let aliasReg : AliasRegistry = + topLevels + |> List.choose (function + | TypeDef (TypeAlias (name, typeParams, targetType)) -> Some (name, (typeParams, targetType)) + | _ -> None) + |> Map.ofList + + // Collect sum type definitions and build variant lookup from THIS program + // Maps variant name -> (type name, type params, tag index, payload type) + // Type params are included for generic type instantiation at constructor call sites + let programVariantLookup : VariantLookup = + topLevels + |> List.choose (function + | TypeDef (SumTypeDef (typeName, typeParams, variants)) -> + Some (typeName, typeParams, variants) + | _ -> None) + |> List.collect (fun (typeName, typeParams, variants) -> + variants + |> List.mapi (fun idx variant -> (variant.Name, (typeName, typeParams, idx, variant.Payload)))) + |> Map.ofList + + // Second pass: collect all function signatures from THIS program + let funcSigs = + topLevels + |> List.choose (function + | FunctionDef funcDef -> + Some ( + funcDef.Name, + (funcDef.Params |> NonEmptyList.toList |> List.map snd, funcDef.ReturnType) + ) + | _ -> None) + |> Map.ofList + + let programFuncParamNameReg : Map = + topLevels + |> List.choose (function + | FunctionDef funcDef -> + Some (funcDef.Name, funcDef.Params |> NonEmptyList.toList |> List.map fst) + | _ -> + None) + |> Map.ofList + + // Build environment with function signatures from THIS program + let programFuncEnv = + funcSigs + |> Map.map (fun _ (paramTypes, returnType) -> TFunction (paramTypes, returnType)) + + // Build generic function registry from THIS program - maps function names to type parameters + let programGenericFuncMap : Map = + topLevels + |> List.choose (function + | FunctionDef funcDef when not (List.isEmpty funcDef.TypeParams) -> + Some (funcDef.Name, funcDef.TypeParams) + | _ -> None) + |> Map.ofList + + let programGenericFuncReg : GenericFuncRegistry = { + Functions = programGenericFuncMap + RequireExplicitTypeArgsForBareCalls = requireExplicitTypeArgsForBareCalls + } + + // Build module registry once (or reuse from base environment) + let moduleRegistry = + match baseEnv with + | Some existingEnv -> existingEnv.ModuleRegistry + | None -> Stdlib.buildModuleRegistry () + + // Build the type check environment for THIS program + let programEnv : TypeCheckEnv = { + TypeReg = programTypeReg + VariantLookup = programVariantLookup + FuncEnv = programFuncEnv + FuncParamNames = programFuncParamNameReg + GenericFuncReg = programGenericFuncReg + ModuleRegistry = moduleRegistry + AliasReg = aliasReg + } + + // Merge with base environment if provided (for separate compilation) + let typeCheckEnv = + match baseEnv with + | Some existingEnv -> mergeTypeCheckEnv existingEnv programEnv + | None -> programEnv + + // Extract the merged registries for use in type checking + let typeReg = typeCheckEnv.TypeReg + let variantLookup = typeCheckEnv.VariantLookup + let funcEnv = typeCheckEnv.FuncEnv + let funcParamNameReg = typeCheckEnv.FuncParamNames + let genericFuncReg = typeCheckEnv.GenericFuncReg + let mergedAliasReg = typeCheckEnv.AliasReg + + // Third pass: type check all function definitions and collect transformed top-levels + // The accumulator contains (type option * TopLevel) pairs where the type is Some for expressions + let rec checkAllTopLevelsWithTypes remaining accTopLevels = + match remaining with + | [] -> Ok (List.rev accTopLevels) + | topLevel :: rest -> + match topLevel with + | FunctionDef funcDef -> + checkFunctionDef + funcParamNameReg + funcDef + funcEnv + typeReg + variantLookup + genericFuncReg + warningSettings + moduleRegistry + mergedAliasReg + |> Result.bind (fun funcDef' -> + checkAllTopLevelsWithTypes rest ((None, FunctionDef funcDef') :: accTopLevels)) + | TypeDef _ -> + checkAllTopLevelsWithTypes rest ((None, topLevel) :: accTopLevels) + | Expression expr -> + checkExprWithParamNames + funcParamNameReg + expr + funcEnv + typeReg + variantLookup + genericFuncReg + warningSettings + moduleRegistry + mergedAliasReg + None + |> Result.bind (fun (exprType, expr') -> + checkAllTopLevelsWithTypes rest ((Some exprType, Expression expr') :: accTopLevels)) + + // Type check all top-levels + checkAllTopLevelsWithTypes topLevels [] + |> Result.bind (fun topLevelsWithTypes -> + // Extract just the top-levels + let topLevels' = topLevelsWithTypes |> List.map snd + let topLevelsWithEqHelpers = + materializeEqHelpersInTopLevels mergedAliasReg typeReg variantLookup topLevels' + // Find the type of the main expression (if any) + let mainExprType = topLevelsWithTypes |> List.tryPick (function (Some t, Expression _) -> Some t | _ -> None) + match mainExprType with + | Some typ -> + // We have a main expression with its type - no need to re-check + Ok (typ, Program topLevelsWithEqHelpers, typeCheckEnv) + | None -> + // No main expression - just functions + // For now, require a "main" function with signature () -> int + match Map.tryFind "main" funcSigs with + | Some ([], TInt64) -> Ok (TInt64, Program topLevelsWithEqHelpers, typeCheckEnv) + | Some _ -> Error (GenericError "main function must have signature () -> int") + | None -> Error (GenericError "Program must have either a main expression or a main() : int function")) + +/// Type-check a program +/// Returns the type of the main expression and the transformed program +/// The transformed program has Call nodes converted to TypeApp where type inference was applied +let checkProgram (program: Program) : Result = + checkProgramInternal None false AST.defaultWarningSettings program + |> Result.map (fun (typ, prog, _env) -> (typ, prog)) + +/// Type-check a program and return the type checking environment +/// Use this when you need to reuse the environment (e.g., for stdlib caching) +let checkProgramWithEnv (program: Program) : Result = + checkProgramInternal None false AST.defaultWarningSettings program + +/// Type-check a program with a pre-populated base environment (for separate compilation) +/// The program's definitions are merged with the base environment, allowing lookups +/// of types/functions from both the base (e.g., stdlib) and the program (e.g., user code) +let checkProgramWithBaseEnv (baseEnv: TypeCheckEnv) (program: Program) : Result = + checkProgramInternal (Some baseEnv) false AST.defaultWarningSettings program + +/// Type-check a program with a pre-populated base environment, generic-call policy override, +/// and warning compatibility settings from the compiler driver. +let checkProgramWithBaseEnvAndSettings + (baseEnv: TypeCheckEnv) + (requireExplicitTypeArgsForBareCalls: bool) + (warningSettings: WarningSettings) + (program: Program) + : Result = + checkProgramInternal (Some baseEnv) requireExplicitTypeArgsForBareCalls warningSettings program diff --git a/backend/src/LibCompiler/passes/1_InterpreterParser.fs b/backend/src/LibCompiler/passes/1_InterpreterParser.fs new file mode 100644 index 0000000000..2ac7cfc2d6 --- /dev/null +++ b/backend/src/LibCompiler/passes/1_InterpreterParser.fs @@ -0,0 +1,2763 @@ +// 1_InterpreterParser.fs - Lexer and Parser for interpreter-style syntax +// +// Transforms Darklang interpreter-style source code (string) into the shared +// compiler Abstract Syntax Tree (AST). +// +// Lexer: Converts source string into tokens +// Parser: Recursive descent parser with operator precedence +// +// Operator precedence (specific to this parser): +// - Multiplication and division bind tighter than addition and subtraction +// - Operators are left-associative: "1 + 2 + 3" parses as "(1 + 2) + 3" +// - Parentheses for explicit grouping +// +// Example: +// "2 + 3 * 4" → BinOp(Add, Int64Literal(2), BinOp(Mul, Int64Literal(3), Int64Literal(4))) + +module InterpreterParser + +open AST + +/// Part of an interpolated string token +type InterpPart = + | InterpText of string // Literal text + | InterpTokens of Token list // Tokens for an expression (will be parsed later) + +/// Token types for lexer +and Token = + | TInt64 of int64 // Default integer (Int64) + | TInt128 of System.Int128 // 128-bit signed: 1Q + | TInt8 of sbyte // 8-bit signed: 1y + | TInt16 of int16 // 16-bit signed: 1s + | TInt32 of int32 // 32-bit signed: 1l + | TUInt8 of byte // 8-bit unsigned: 1uy + | TUInt16 of uint16 // 16-bit unsigned: 1us + | TUInt32 of uint32 // 32-bit unsigned: 1ul + | TUInt64 of uint64 // 64-bit unsigned: 1UL + | TUInt128 of System.UInt128 // 128-bit unsigned: 1Z + | TFloat of float + | TStringLit of string // String literal token (named to avoid conflict with AST.TString type) + | TCharLit of string // Char literal: 'x' (stores UTF-8 string for EGC support) + | TInterpString of InterpPart list // Interpolated string: $"Hello {name}!" + | TTrue + | TFalse + | TPlus + | TPlusPlus // ++ (string concatenation) + | TMinus + | TStar + | TSlash + | TLParen + | TRParen + | TLet + | TIn + | TIf // if + | TElif // elif + | TThen // then + | TElse // else + | TDef // def (function definition) + | TType // type (type definition) + | TCons // :: (list cons pattern) + | TColon // : (type annotation) + | TComma // , (parameter separator) + | TSemicolon // ; (interpreter-style list separator) + | TDot // . (tuple/record access) + | TLBrace // { (record literal) + | TRBrace // } (record literal) + | TBar // | (sum type variant separator / pattern separator) + | TOf // of (sum type payload) + | TMatch // match (pattern matching) + | TWith // with (pattern matching) + | TFun // fun (interpreter-style lambda) + | TArrow // -> (pattern matching) + | TUnderscore // _ (wildcard pattern) + | TWhen // when (guard clause in pattern matching) + | TLBracket // [ (list literal) + | TRBracket // ] (list literal) + | TEquals // = (assignment in let) + | TEqEq // == (equality comparison) + | TNeq // != + | TLt // < + | TGt // > + | TLte // <= + | TGte // >= + | TAnd // && + | TOr // || + | TNot // ! + | TPipe // |> (pipe operator) + | TDotDotDot // ... (rest pattern in lists) + | TPercent // % (modulo) + | TShl // << (left shift) + | TShr // >> (right shift) + | TBitAnd // & (bitwise and) + | TBitOr // ||| (bitwise or) + | TBitXor // ^ (bitwise xor) + | TBitNot // ~~~ (bitwise not) + | TIdent of string + | TEOF + +/// Lexer: convert string to list of tokens +let lex (input: string) : Result = + let rec lexHelper (chars: char list) (acc: Token list) : Result = + match chars with + | [] -> Ok (List.rev (TEOF :: acc)) + | ' ' :: rest | '\t' :: rest | '\n' :: rest | '\r' :: rest -> + // Skip whitespace + lexHelper rest acc + | '+' :: '+' :: rest -> lexHelper rest (TPlusPlus :: acc) + | '+' :: rest -> lexHelper rest (TPlus :: acc) + | '-' :: '>' :: rest -> lexHelper rest (TArrow :: acc) + | '-' :: rest -> lexHelper rest (TMinus :: acc) + | '=' :: '>' :: _ -> Error "Interpreter syntax does not use '=>'; use 'fun -> '" + | '*' :: rest -> lexHelper rest (TStar :: acc) + | '/' :: '/' :: rest -> + // Skip line comment: // ... until end of line + let rec skipToEndOfLine (cs: char list) : char list = + match cs with + | [] -> [] + | '\n' :: remaining -> remaining + | '\r' :: '\n' :: remaining -> remaining + | '\r' :: remaining -> remaining + | _ :: remaining -> skipToEndOfLine remaining + lexHelper (skipToEndOfLine rest) acc + | '/' :: rest -> lexHelper rest (TSlash :: acc) + | '(' :: rest -> lexHelper rest (TLParen :: acc) + | ')' :: rest -> lexHelper rest (TRParen :: acc) + | '{' :: rest -> lexHelper rest (TLBrace :: acc) + | '}' :: rest -> lexHelper rest (TRBrace :: acc) + | '[' :: rest -> lexHelper rest (TLBracket :: acc) + | ']' :: rest -> lexHelper rest (TRBracket :: acc) + | ':' :: ':' :: rest -> lexHelper rest (TCons :: acc) + | ':' :: rest -> lexHelper rest (TColon :: acc) + | ',' :: rest -> lexHelper rest (TComma :: acc) + | ';' :: rest -> lexHelper rest (TSemicolon :: acc) + | '.' :: '.' :: '.' :: rest -> lexHelper rest (TDotDotDot :: acc) + | '.' :: rest -> lexHelper rest (TDot :: acc) + | '=' :: '=' :: rest -> lexHelper rest (TEqEq :: acc) + | '=' :: rest -> lexHelper rest (TEquals :: acc) + | '!' :: '=' :: rest -> lexHelper rest (TNeq :: acc) + | '!' :: rest -> lexHelper rest (TNot :: acc) + | '<' :: '<' :: rest -> lexHelper rest (TShl :: acc) + | '<' :: '=' :: rest -> lexHelper rest (TLte :: acc) + | '<' :: rest -> lexHelper rest (TLt :: acc) + | '>' :: '>' :: rest -> lexHelper rest (TShr :: acc) + | '>' :: '=' :: rest -> lexHelper rest (TGte :: acc) + | '>' :: rest -> lexHelper rest (TGt :: acc) + | '&' :: '&' :: rest -> lexHelper rest (TAnd :: acc) + | '&' :: rest -> lexHelper rest (TBitAnd :: acc) + | '^' :: rest -> lexHelper rest (TBitXor :: acc) + | '~' :: '~' :: '~' :: rest -> lexHelper rest (TBitNot :: acc) + | '%' :: rest -> lexHelper rest (TPercent :: acc) + | '|' :: '|' :: '|' :: rest -> lexHelper rest (TBitOr :: acc) + | '|' :: '|' :: rest -> lexHelper rest (TOr :: acc) + | '|' :: '>' :: rest -> lexHelper rest (TPipe :: acc) + | '|' :: rest -> lexHelper rest (TBar :: acc) + | '`' :: '`' :: rest -> + // Backtick-escaped identifiers: ``name`` (including keyword-like names). + let rec parseBacktickIdent (cs: char list) (chars: char list) : Result = + match cs with + | '`' :: '`' :: remaining -> + let ident = System.String(List.rev chars |> List.toArray) + if ident.Length = 0 then + Error "Backtick identifier cannot be empty" + else + Ok (ident, remaining) + | '\n' :: _ | '\r' :: _ -> + Error "Unterminated backtick identifier" + | c :: remaining -> + parseBacktickIdent remaining (c :: chars) + | [] -> + Error "Unterminated backtick identifier" + + parseBacktickIdent rest [] + |> Result.bind (fun (ident, remaining) -> + lexHelper remaining (TIdent ident :: acc)) + | '`' :: _ -> + Error "Backtick identifiers must use double backticks: ``name``" + | c :: _ when System.Char.IsLetter(c) || c = '_' -> + // Parse identifier or keyword + let rec parseIdent (cs: char list) (chars: char list) : string * char list = + match cs with + | c :: rest when System.Char.IsLetterOrDigit(c) || c = '_' || c = '\'' -> + parseIdent rest (c :: chars) + | _ -> + let ident = System.String(List.rev chars |> List.toArray) + (ident, cs) + + let (ident, remaining) = parseIdent chars [] + let token = + match ident with + | "let" -> TLet + | "in" -> TIn + | "if" -> TIf + | "elif" -> TElif + | "then" -> TThen + | "else" -> TElse + | "def" -> TDef + | "type" -> TType + | "of" -> TOf + | "match" -> TMatch + | "with" -> TWith + | "fun" -> TFun + | "when" -> TWhen + | "true" -> TTrue + | "false" -> TFalse + | "_" -> TUnderscore + | _ -> TIdent ident + lexHelper remaining (token :: acc) + | c :: _ when System.Char.IsDigit(c) -> + // Parse number (integer or float) + // First collect all digits + let rec collectDigits (cs: char list) (acc: char list) : char list * char list = + match cs with + | d :: rest when System.Char.IsDigit(d) -> collectDigits rest (d :: acc) + | _ -> (List.rev acc, cs) + + let (intDigits, afterInt) = collectDigits chars [] + + // Check if this is a float (has decimal point or exponent) + match afterInt with + | '.' :: rest when not (List.isEmpty rest) && System.Char.IsDigit(List.head rest) -> + // Float with decimal point: 3.14 + let (fracDigits, afterFrac) = collectDigits rest [] + // Check for exponent + match afterFrac with + | ('e' :: rest' | 'E' :: rest') -> + // Scientific notation: 3.14e10 or 3.14e-10 + let (expSign, afterSign) = + match rest' with + | '+' :: r -> (['+'], r) + | '-' :: r -> (['-'], r) + | _ -> ([], rest') + let (expDigits, remaining) = collectDigits afterSign [] + if List.isEmpty expDigits then + Error "Expected exponent digits after 'e'" + else + let numStr = System.String(Array.ofList (intDigits @ ['.'] @ fracDigits @ ['e'] @ expSign @ expDigits)) + match System.Double.TryParse(numStr, System.Globalization.NumberStyles.Float, System.Globalization.CultureInfo.InvariantCulture) with + | (true, value) -> lexHelper remaining (TFloat value :: acc) + | (false, _) -> Error $"Invalid float literal: {numStr}" + | _ -> + // Float without exponent: 3.14 + let numStr = System.String(Array.ofList (intDigits @ ['.'] @ fracDigits)) + match System.Double.TryParse(numStr, System.Globalization.NumberStyles.Float, System.Globalization.CultureInfo.InvariantCulture) with + | (true, value) -> lexHelper afterFrac (TFloat value :: acc) + | (false, _) -> Error $"Invalid float literal: {numStr}" + | ('e' :: rest | 'E' :: rest) -> + // Scientific notation without decimal: 1e10 or 1e-10 + let (expSign, afterSign) = + match rest with + | '+' :: r -> (['+'], r) + | '-' :: r -> (['-'], r) + | _ -> ([], rest) + let (expDigits, remaining) = collectDigits afterSign [] + if List.isEmpty expDigits then + Error "Expected exponent digits after 'e'" + else + let numStr = System.String(Array.ofList (intDigits @ ['e'] @ expSign @ expDigits)) + match System.Double.TryParse(numStr, System.Globalization.NumberStyles.Float, System.Globalization.CultureInfo.InvariantCulture) with + | (true, value) -> lexHelper remaining (TFloat value :: acc) + | (false, _) -> Error $"Invalid float literal: {numStr}" + | _ -> + // Interpreter syntax accepts legacy bare Int64 literals for + // upstream compatibility. + let numStr = System.String(List.toArray intDigits) + let parseInt64OrError (remaining: char list) = + match System.Int64.TryParse(numStr) with + | (true, value) -> lexHelper remaining (TInt64 value :: acc) + | (false, _) -> + if numStr = "9223372036854775808" then + lexHelper remaining (TInt64 System.Int64.MinValue :: acc) + else + Error $"Integer literal too large: {numStr}" + let parseSizedIntOrError typeName tryParse mkToken remaining : Result = + match tryParse numStr with + | (true, value) -> lexHelper remaining (mkToken value :: acc) + | (false, _) -> Error $"Integer literal out of range for {typeName}: {numStr}" + let parseSignedSizedIntOrError + typeName + minAbsSentinel + minValue + tryParse + mkToken + remaining + : Result = + match tryParse numStr with + | (true, value) -> lexHelper remaining (mkToken value :: acc) + | (false, _) when numStr = minAbsSentinel -> + lexHelper remaining (mkToken minValue :: acc) + | (false, _) -> + Error $"Integer literal out of range for {typeName}: {numStr}" + let parseInt128OrError (remaining: char list) : Result = + match System.Int128.TryParse(numStr) with + | (true, value) -> lexHelper remaining (TInt128 value :: acc) + | (false, _) -> + if numStr = "170141183460469231731687303715884105728" then + lexHelper remaining (TInt128 System.Int128.MinValue :: acc) + else + Error $"Integer literal out of range for Int128: {numStr}" + let parseUInt128OrError (remaining: char list) : Result = + match System.UInt128.TryParse(numStr) with + | (true, value) -> lexHelper remaining (TUInt128 value :: acc) + | (false, _) -> Error $"Integer literal out of range for UInt128: {numStr}" + + match afterInt with + | 'L' :: rest -> + parseInt64OrError rest + | 'Q' :: rest -> + parseInt128OrError rest + | 'y' :: rest -> + parseSignedSizedIntOrError + "Int8" + "128" + System.SByte.MinValue + System.SByte.TryParse + TInt8 + rest + | 's' :: rest -> + parseSignedSizedIntOrError + "Int16" + "32768" + System.Int16.MinValue + System.Int16.TryParse + TInt16 + rest + | 'l' :: rest -> + parseSignedSizedIntOrError + "Int32" + "2147483648" + System.Int32.MinValue + System.Int32.TryParse + TInt32 + rest + | 'Z' :: rest -> + parseUInt128OrError rest + | 'u' :: 'y' :: rest -> + parseSizedIntOrError "UInt8" System.Byte.TryParse TUInt8 rest + | 'u' :: 's' :: rest -> + parseSizedIntOrError "UInt16" System.UInt16.TryParse TUInt16 rest + | 'u' :: 'l' :: rest -> + parseSizedIntOrError "UInt32" System.UInt32.TryParse TUInt32 rest + | 'U' :: 'L' :: rest -> + parseSizedIntOrError "UInt64" System.UInt64.TryParse TUInt64 rest + | _ -> + parseInt64OrError afterInt + | '$' :: '"' :: rest -> + // Parse interpolated string: $"Hello {name}!" + // Returns TInterpString token with parts list + let (isTripleQuoted, contentStart) = + match rest with + | '"' :: '"' :: remaining -> (true, remaining) + | _ -> (false, rest) + + // Helper to parse escape sequences (same as regular strings) + let parseEscape (cs: char list) : Result = + match cs with + | 'n' :: remaining -> Ok ('\n', remaining) + | 't' :: remaining -> Ok ('\t', remaining) + | 'r' :: remaining -> Ok ('\r', remaining) + | '\\' :: remaining -> Ok ('\\', remaining) + | '"' :: remaining -> Ok ('"', remaining) + | '\'' :: remaining -> Ok ('\'', remaining) + | '0' :: remaining -> Ok ('\000', remaining) + | '{' :: remaining -> Ok ('{', remaining) // Escape { as \{ + | '}' :: remaining -> Ok ('}', remaining) // Escape } as \} + | 'x' :: h1 :: h2 :: remaining -> + let hexStr = System.String([| h1; h2 |]) + match System.Int32.TryParse(hexStr, System.Globalization.NumberStyles.HexNumber, null) with + | (true, value) -> Ok (char value, remaining) + | (false, _) -> Error $"Invalid hex escape sequence: \\x{hexStr}" + | 'u' :: h1 :: h2 :: h3 :: h4 :: remaining -> + let hexStr = System.String([| h1; h2; h3; h4 |]) + match System.Int32.TryParse(hexStr, System.Globalization.NumberStyles.HexNumber, null) with + | (true, value) -> Ok (char value, remaining) + | (false, _) -> Error $"Invalid unicode escape sequence: \\u{hexStr}" + | c :: _ -> Error $"Unknown escape sequence: \\{c}" + | [] -> Error "Unterminated escape sequence" + + // Helper to collect characters until { or closing " + let rec collectLiteralPart (cs: char list) (chars: char list) : Result = + match cs with + | [] -> Error "Unterminated interpolated string" + | '"' :: '"' :: '"' :: remaining when isTripleQuoted -> + let str = System.String(List.rev chars |> List.toArray) + Ok (str, '"' :: '"' :: '"' :: remaining) // Put """ back for caller to detect end + | '"' :: remaining -> + if isTripleQuoted then + collectLiteralPart remaining ('"' :: chars) + else + let str = System.String(List.rev chars |> List.toArray) + Ok (str, '"' :: remaining) // Put " back for caller to detect end + | '{' :: remaining -> + let str = System.String(List.rev chars |> List.toArray) + Ok (str, '{' :: remaining) // Put { back for caller to detect expression + | '\\' :: escRest when not isTripleQuoted -> + match parseEscape escRest with + | Ok (c, remaining) -> collectLiteralPart remaining (c :: chars) + | Error err -> Error err + | c :: remaining -> + collectLiteralPart remaining (c :: chars) + + // Helper to collect expression chars until matching } + let rec collectExprChars (cs: char list) (depth: int) (chars: char list) : Result = + match cs with + | [] -> Error "Unterminated interpolated expression" + | '}' :: remaining when depth = 0 -> + Ok (List.rev chars, remaining) + | '}' :: remaining -> + collectExprChars remaining (depth - 1) ('}' :: chars) + | '{' :: remaining -> + collectExprChars remaining (depth + 1) ('{' :: chars) + | '"' :: remaining -> + // Skip strings inside the expression + let rec skipString (cs: char list) (acc: char list) = + match cs with + | [] -> Error "Unterminated string in interpolated expression" + | '"' :: rest -> Ok ('"' :: acc, rest) + | '\\' :: c :: rest -> skipString rest (c :: '\\' :: acc) + | c :: rest -> skipString rest (c :: acc) + match skipString remaining ('"' :: chars) with + | Ok (acc', rest') -> collectExprChars rest' depth acc' + | Error err -> Error err + | c :: remaining -> + collectExprChars remaining depth (c :: chars) + + // Parse all parts and build InterpPart list + let rec parseInterpParts (cs: char list) (parts: InterpPart list) : Result = + match cs with + | '"' :: '"' :: '"' :: remaining when isTripleQuoted -> + // End of triple-quoted interpolated string + Ok (List.rev parts, remaining) + | '"' :: remaining when not isTripleQuoted -> + // End of interpolated string + Ok (List.rev parts, remaining) + | '{' :: remaining -> + // Expression part - collect chars and lex them + match collectExprChars remaining 0 [] with + | Ok (exprChars, afterExpr) -> + let exprStr = System.String(exprChars |> List.toArray) + // Lex the expression + match lexHelper (exprStr |> Seq.toList) [] with + | Ok tokens -> + let tokens' = tokens |> List.filter (fun t -> t <> TEOF) + parseInterpParts afterExpr (InterpTokens tokens' :: parts) + | Error err -> Error $"Error in interpolated expression: {err}" + | Error err -> Error err + | _ -> + // Literal part + match collectLiteralPart cs [] with + | Ok (str, afterLit) -> + if str = "" then + parseInterpParts afterLit parts + else + parseInterpParts afterLit (InterpText str :: parts) + | Error err -> Error err + + match parseInterpParts contentStart [] with + | Ok (parts, remaining) -> + lexHelper remaining (TInterpString parts :: acc) + | Error err -> Error err + + | '"' :: '"' :: '"' :: rest -> + // Parse raw triple-quoted string literal: """...""" + let rec parseTripleString (cs: char list) (chars: char list) : Result = + match cs with + | [] -> Error "Unterminated triple-quoted string literal" + | '"' :: '"' :: '"' :: remaining -> + let str = System.String(List.rev chars |> List.toArray) + Ok (str, remaining) + | c :: remaining -> + parseTripleString remaining (c :: chars) + + match parseTripleString rest [] with + | Ok (str, remaining) -> lexHelper remaining (TStringLit str :: acc) + | Error err -> Error err + + | '\'' :: rest -> + // Parse char literal with escape sequences (single Extended Grapheme Cluster) + let rec parseCharContent (cs: char list) (chars: char list) : Result = + match cs with + | [] -> Error "Unterminated char literal" + | '\'' :: remaining -> + // End of char literal + let str = System.String(List.rev chars |> List.toArray) + if str.Length = 0 then + Error "Empty char literal" + else + // Validate that it's a single Extended Grapheme Cluster using .NET's StringInfo + let enumerator = System.Globalization.StringInfo.GetTextElementEnumerator(str) + if enumerator.MoveNext() then + if enumerator.MoveNext() then + Error $"Char literal contains more than one grapheme cluster: '{str}'" + else + Ok (str, remaining) + else + Error "Empty char literal" + | '\\' :: 'n' :: remaining -> + parseCharContent remaining ('\n' :: chars) + | '\\' :: 't' :: remaining -> + parseCharContent remaining ('\t' :: chars) + | '\\' :: 'r' :: remaining -> + parseCharContent remaining ('\r' :: chars) + | '\\' :: '\\' :: remaining -> + parseCharContent remaining ('\\' :: chars) + | '\\' :: '\'' :: remaining -> + parseCharContent remaining ('\'' :: chars) + | '\\' :: '0' :: remaining -> + parseCharContent remaining ('\000' :: chars) + | '\\' :: 'x' :: h1 :: h2 :: remaining -> + // Hex escape: \xNN + let hexStr = System.String([| h1; h2 |]) + match System.Int32.TryParse(hexStr, System.Globalization.NumberStyles.HexNumber, null) with + | (true, value) -> + parseCharContent remaining (char value :: chars) + | (false, _) -> + Error $"Invalid hex escape sequence: \\x{hexStr}" + | '\\' :: c :: _ -> + Error $"Unknown escape sequence: \\{c}" + | c :: remaining -> + parseCharContent remaining (c :: chars) + + let parseCharLiteral () : Result = + match parseCharContent rest [] with + | Ok (str, remaining) -> lexHelper remaining (TCharLit str :: acc) + | Error err -> Error err + + let isApostropheTypeVarContext = + match acc with + | TLParen :: _ // parenthesized type context: ('a * 'b) + | TStar :: _ // tuple-type element separator: 'a * 'b + | TLt :: _ // generic/type arg list start: <'a> + | TComma :: _ // additional generic/type arg: <'a, 'b> + | TColon :: _ // type annotation: x: 'a + | TArrow :: _ // function return type: ('a) -> 'b + | TOf :: _ // sum payload type: Case of 'a + | TEquals :: _ -> // type alias body: type T = 'a + true + | _ -> + false + + let rec parseTypeVarName (cs: char list) (chars: char list) : string * char list = + match cs with + | c :: remaining when System.Char.IsLetterOrDigit(c) || c = '_' -> + parseTypeVarName remaining (c :: chars) + | _ -> + (System.String(List.rev chars |> List.toArray), cs) + + match rest with + | c :: _ when isApostropheTypeVarContext && (System.Char.IsLetter(c) || c = '_') -> + let (typeVarName, afterTypeVar) = parseTypeVarName rest [] + match afterTypeVar with + | '\'' :: _ -> + // Still a char literal if we see a closing quote. + parseCharLiteral () + | _ -> + lexHelper afterTypeVar (TIdent typeVarName :: acc) + | _ -> + parseCharLiteral () + + | '"' :: rest -> + // Parse string literal with escape sequences + let rec parseString (cs: char list) (chars: char list) : Result = + match cs with + | [] -> Error "Unterminated string literal" + | '"' :: remaining -> + // End of string + let str = System.String(List.rev chars |> List.toArray) + Ok (str, remaining) + | '\\' :: 'n' :: remaining -> + parseString remaining ('\n' :: chars) + | '\\' :: 't' :: remaining -> + parseString remaining ('\t' :: chars) + | '\\' :: 'r' :: remaining -> + parseString remaining ('\r' :: chars) + | '\\' :: '\\' :: remaining -> + parseString remaining ('\\' :: chars) + | '\\' :: '"' :: remaining -> + parseString remaining ('"' :: chars) + | '\\' :: '\'' :: remaining -> + parseString remaining ('\'' :: chars) + | '\\' :: '0' :: remaining -> + parseString remaining ('\000' :: chars) + | '\\' :: 'x' :: h1 :: h2 :: remaining -> + // Hex escape: \xNN + let hexStr = System.String([| h1; h2 |]) + match System.Int32.TryParse(hexStr, System.Globalization.NumberStyles.HexNumber, null) with + | (true, value) -> + parseString remaining (char value :: chars) + | (false, _) -> + Error $"Invalid hex escape sequence: \\x{hexStr}" + | '\\' :: 'u' :: h1 :: h2 :: h3 :: h4 :: remaining -> + // Unicode escape: \uNNNN + let hexStr = System.String([| h1; h2; h3; h4 |]) + match System.Int32.TryParse(hexStr, System.Globalization.NumberStyles.HexNumber, null) with + | (true, value) -> + parseString remaining (char value :: chars) + | (false, _) -> + Error $"Invalid unicode escape sequence: \\u{hexStr}" + | '\\' :: c :: _ -> + Error $"Unknown escape sequence: \\{c}" + | c :: remaining -> + parseString remaining (c :: chars) + + match parseString rest [] with + | Ok (str, remaining) -> lexHelper remaining (TStringLit str :: acc) + | Error err -> Error err + | c :: _ -> + Error $"Unexpected character: {c}" + + input |> Seq.toList |> fun cs -> lexHelper cs [] + +/// Parse parenthesized type entries for function and tuple forms. +/// Entries may be comma- or star-separated, and each entry can be a full type expression. +let rec parseFunctionTypeParams (typeParams: Set) (tokens: Token list) (acc: Type list) : Result = + match tokens with + | TRParen :: rest -> + // End of parameter list + Ok (List.rev acc, rest) + | _ -> + // Parse a type expression (allows nested function/tuple types) + parseTypeWithContext typeParams tokens + |> Result.bind (fun (ty, remaining) -> + match remaining with + | TRParen :: rest -> Ok (List.rev (ty :: acc), rest) + | TComma :: rest -> parseFunctionTypeParams typeParams rest (ty :: acc) + | TStar :: rest -> parseFunctionTypeParams typeParams rest (ty :: acc) + | _ -> Error "Expected ',', '*', or ')' in function type parameters") + +/// Base type parser (no function types - used to parse function type components) +and parseTypeBase (typeParams: Set) (tokens: Token list) : Result = + match tokens with + | TIdent "Int8" :: rest -> Ok (AST.TInt8, rest) + | TIdent "Int16" :: rest -> Ok (AST.TInt16, rest) + | TIdent "Int32" :: rest -> Ok (AST.TInt32, rest) + | TIdent "Int64" :: rest -> Ok (AST.TInt64, rest) + | TIdent "Int128" :: rest -> Ok (AST.TInt128, rest) + | TIdent "UInt8" :: rest -> Ok (AST.TUInt8, rest) + | TIdent "UInt16" :: rest -> Ok (AST.TUInt16, rest) + | TIdent "UInt32" :: rest -> Ok (AST.TUInt32, rest) + | TIdent "UInt64" :: rest -> Ok (AST.TUInt64, rest) + | TIdent "UInt128" :: rest -> Ok (AST.TUInt128, rest) + | TIdent "Bool" :: rest -> Ok (AST.TBool, rest) + | TIdent "String" :: rest -> Ok (AST.TString, rest) + | TIdent "Bytes" :: rest -> Ok (AST.TBytes, rest) + | TIdent "Char" :: rest -> Ok (AST.TChar, rest) + | TIdent "Float" :: rest -> Ok (AST.TFloat64, rest) + | TIdent "Unit" :: rest -> Ok (AST.TUnit, rest) + | TIdent "RawPtr" :: rest -> Ok (AST.TRawPtr, rest) // Internal raw pointer type + | TIdent typeName :: rest when Set.contains typeName typeParams -> + Ok (TVar typeName, rest) + | TIdent typeName :: rest when System.Char.IsLower(typeName.[0]) || typeName.[0] = '_' -> + // Interpreter syntax allows apostrophe-prefixed type variables in type annotations + // without requiring explicit generic binders on function/type definitions. + Ok (TVar typeName, rest) + | TIdent "List" :: TLt :: rest -> + // List type: List + parseTypeWithContext typeParams rest + |> Result.bind (fun (elemType, afterElem) -> + match afterElem with + | TGt :: remaining -> Ok (TList elemType, remaining) + | TShr :: remaining -> Ok (TList elemType, TGt :: remaining) // >> is two >'s + | _ -> Error "Expected '>' after List element type") + | TIdent "Dict" :: TLt :: rest -> + // Dict type: Dict + parseTypeWithContext typeParams rest + |> Result.bind (fun (firstTypeArg, afterFirstArg) -> + match afterFirstArg with + | TComma :: valueRest -> + parseTypeWithContext typeParams valueRest + |> Result.bind (fun (valueType, afterValue) -> + match afterValue with + | TGt :: remaining -> Ok (TDict (firstTypeArg, valueType), remaining) + | TShr :: remaining -> Ok (TDict (firstTypeArg, valueType), TGt :: remaining) // >> is two >'s + | _ -> Error "Expected '>' after Dict value type") + | TGt :: remaining -> + // Upstream interpreter syntax uses Dict shorthand + // with implicit String keys. + Ok (TDict (AST.TString, firstTypeArg), remaining) + | TShr :: remaining -> + Ok (TDict (AST.TString, firstTypeArg), TGt :: remaining) // >> is two >'s + | _ -> Error "Expected ',' or '>' after Dict type argument") + | TIdent typeName :: rest when System.Char.IsUpper(typeName.[0]) -> + // Could be a simple type or a qualified type like Stdlib.Option.Option + // First parse the full qualified name + let rec parseQualTypeName (name: string) (toks: Token list) : string * Token list = + match toks with + | TDot :: TIdent nextName :: remaining when System.Char.IsUpper(nextName.[0]) -> + parseQualTypeName (name + "." + nextName) remaining + | _ -> (name, toks) + let (fullTypeName, afterTypeName) = parseQualTypeName typeName rest + // Check for type arguments <...> + match afterTypeName with + | TLt :: typeArgsStart -> + // Generic type: TypeName + // Need to parse type args allowing lowercase type variables + let rec parseTypeArgsInType (toks: Token list) (acc: Type list) : Result = + parseTypeWithContext typeParams toks + |> Result.bind (fun (ty, remaining) -> + match remaining with + | TGt :: rest -> Ok (List.rev (ty :: acc), rest) + | TShr :: rest -> Ok (List.rev (ty :: acc), TGt :: rest) // >> is two >'s + | TComma :: rest -> parseTypeArgsInType rest (ty :: acc) + | _ -> Error "Expected ',' or '>' after type argument in generic type") + parseTypeArgsInType typeArgsStart [] + |> Result.map (fun (typeArgs, remaining) -> + // Store as TSum with type arguments - type checker will validate + (TSum (fullTypeName, typeArgs), remaining)) + | _ -> + // Simple type without type arguments + Ok (TRecord (fullTypeName, []), afterTypeName) + | TLParen :: rest -> + // Could be a function type: (int, int) -> bool + // Or a tuple/grouped type: (int, int) or (Person -> Bool) + parseFunctionTypeParams typeParams rest [] + |> Result.bind (fun (paramTypes, afterParams) -> + match afterParams with + | TArrow :: returnRest -> + // Function type: (params) -> return + parseTypeWithContext typeParams returnRest + |> Result.map (fun (returnType, remaining) -> + (TFunction (paramTypes, returnType), remaining)) + | _ -> + // Parenthesized single type or tuple type. + match paramTypes with + | [] -> + Error "Parenthesized type cannot be empty" + | [single] -> + Ok (single, afterParams) + | _ -> + Ok (TTuple paramTypes, afterParams)) + | _ -> Error "Expected type annotation (Int64, Bool, String, Float, TypeName, type variable, or function type)" + +/// Parse a type annotation with context for type parameters in scope +and parseTypeWithContext (typeParams: Set) (tokens: Token list) : Result = + let asFunctionParamTypes (ty: Type) : Type list = + match ty with + | TTuple elements -> elements + | _ -> [ty] + + let rec parseTupleTail (acc: Type list) (remaining: Token list) : Result = + match remaining with + | TStar :: rest -> + parseTypeBase typeParams rest + |> Result.bind (fun (nextType, afterNext) -> + parseTupleTail (nextType :: acc) afterNext) + | _ -> + let allTypes = List.rev acc + match allTypes with + | [single] -> Ok (single, remaining) + | _ -> Ok (TTuple allTypes, remaining) + parseTypeBase typeParams tokens + |> Result.bind (fun (firstType, remaining) -> + parseTupleTail [firstType] remaining + |> Result.bind (fun (parsedType, afterType) -> + match afterType with + | TArrow :: returnRest -> + parseTypeWithContext typeParams returnRest + |> Result.map (fun (returnType, remaining') -> + (TFunction (asFunctionParamTypes parsedType, returnType), remaining')) + | _ -> + Ok (parsedType, afterType))) + +/// Parse a type annotation (no type parameters in scope) +let parseType (tokens: Token list) : Result = + parseTypeWithContext Set.empty tokens + +/// Parse type parameters: (names only, for function definitions) +let rec parseTypeParams (tokens: Token list) (acc: string list) : Result = + match tokens with + | TIdent name :: TGt :: rest when System.Char.IsLower(name.[0]) -> + // Last type parameter + Ok (List.rev (name :: acc), rest) + | TIdent name :: TComma :: rest when System.Char.IsLower(name.[0]) -> + // More type parameters to come + parseTypeParams rest (name :: acc) + | TIdent name :: _ when not (System.Char.IsLower(name.[0])) -> + Error $"Type parameter must start with lowercase letter: {name}" + | TGt :: rest when List.isEmpty acc -> + // Empty type parameters: <> + Ok ([], rest) + | _ -> Error "Expected type parameter name (lowercase identifier)" + +/// Parse type for type arguments context (allows lowercase as type variables) +/// This is used when parsing call sites like func(args) where t is a type variable +let rec parseTypeArgType (tokens: Token list) : Result = + parseTypeWithContext Set.empty tokens + +/// Parse tuple elements in type argument context: Type1, Type2, ... ) +and parseTypeArgTupleElements (tokens: Token list) (acc: Type list) : Result = + match tokens with + | TRParen :: rest -> + // End of tuple/parameter list + Ok (List.rev acc, rest) + | _ -> + // Parse a type + parseTypeArgType tokens + |> Result.bind (fun (ty, remaining) -> + match remaining with + | TRParen :: rest -> Ok (List.rev (ty :: acc), rest) + | TComma :: rest -> parseTypeArgTupleElements rest (ty :: acc) + | _ -> Error "Expected ',' or ')' in tuple type") + +/// Parse type arguments: (concrete types or type vars, for call sites) +let rec parseTypeArgs (tokens: Token list) (acc: Type list) : Result = + parseTypeArgType tokens + |> Result.bind (fun (ty, remaining) -> + match remaining with + | TGt :: rest -> + // Last type argument + Ok (List.rev (ty :: acc), rest) + | TShr :: rest -> + // >> is two >'s - last type argument, put one > back + Ok (List.rev (ty :: acc), TGt :: rest) + | TComma :: rest -> + // More type arguments to come + parseTypeArgs rest (ty :: acc) + | _ -> Error "Expected ',' or '>' after type argument") + +/// Parse a single parameter: IDENT : type (with type parameter context) +let parseParamWithContext (typeParams: Set) (tokens: Token list) : Result<(string * Type) * Token list, string> = + match tokens with + | TIdent name :: TColon :: rest -> + parseTypeWithContext typeParams rest + |> Result.map (fun (ty, remaining) -> ((name, ty), remaining)) + | _ -> Error "Expected parameter (name : type)" + +/// Parse parameter list: param (, param)* (with type parameter context) +let rec parseParamsWithContext (typeParams: Set) (tokens: Token list) (acc: (string * Type) list) : Result<(string * Type) list * Token list, string> = + match tokens with + | TRParen :: _ -> + // End of parameters + Ok (List.rev acc, tokens) + | _ -> + // Parse a parameter + parseParamWithContext typeParams tokens + |> Result.bind (fun (param, remaining) -> + match remaining with + | TComma :: rest -> + // More parameters + parseParamsWithContext typeParams rest (param :: acc) + | TRParen :: _ -> + // End of parameters + Ok (List.rev (param :: acc), remaining) + | _ -> Error "Expected ',' or ')' after parameter") + +/// Parse parameter list: param (, param)* (no type parameters in scope) +let rec parseParams (tokens: Token list) (acc: (string * Type) list) : Result<(string * Type) list * Token list, string> = + parseParamsWithContext Set.empty tokens acc + +/// Parse record fields in a type definition: { name: Type, name: Type, ... } +/// Uses parseTypeWithContext so generic record fields can reference in-scope type parameters. +let rec parseRecordFieldsWithContext + (typeParams: Set) + (tokens: Token list) + (acc: (string * Type) list) + : Result<(string * Type) list * Token list, string> = + match tokens with + | TRBrace :: rest -> + // End of fields + Ok (List.rev acc, rest) + | TIdent name :: TColon :: rest -> + parseTypeWithContext typeParams rest + |> Result.bind (fun (ty, remaining) -> + match remaining with + | (TComma | TSemicolon) :: rest' -> + // More fields + parseRecordFieldsWithContext typeParams rest' ((name, ty) :: acc) + | TIdent _ :: TColon :: _ -> + // Upstream interpreter syntax frequently separates record fields + // by newline indentation instead of explicit separators. + parseRecordFieldsWithContext typeParams remaining ((name, ty) :: acc) + | TRBrace :: rest' -> + // End of fields + Ok (List.rev ((name, ty) :: acc), rest') + | _ -> Error "Expected ',' or '}' after record field") + | _ -> Error "Expected field name in record definition" + +/// Parse record fields in a type definition with no type parameters in scope. +let parseRecordFields (tokens: Token list) (acc: (string * Type) list) : Result<(string * Type) list * Token list, string> = + parseRecordFieldsWithContext Set.empty tokens acc + +/// Parse sum type variants: Variant1 | Variant2 of Type | ... +/// Returns list of variants and remaining tokens +let private parseVariantPayloadType (tokens: Token list) : Result = + let rec stripLabels (expectLabel: bool) (remainingTokens: Token list) (acc: Token list) : Token list = + match remainingTokens with + | TIdent _ :: TColon :: rest when expectLabel -> + stripLabels false rest acc + | TStar :: rest -> + stripLabels true rest (TStar :: acc) + | token :: rest -> + stripLabels false rest (token :: acc) + | [] -> + List.rev acc + + let normalizedTokens = stripLabels true tokens [] + parseType normalizedTokens + +let private parseVariantPayloadTypeWithContext + (typeParamSet: Set) + (tokens: Token list) + : Result = + let rec stripLabels (expectLabel: bool) (remainingTokens: Token list) (acc: Token list) : Token list = + match remainingTokens with + | TIdent _ :: TColon :: rest when expectLabel -> + stripLabels false rest acc + | TStar :: rest -> + stripLabels true rest (TStar :: acc) + | token :: rest -> + stripLabels false rest (token :: acc) + | [] -> + List.rev acc + + let normalizedTokens = stripLabels true tokens [] + parseTypeWithContext typeParamSet normalizedTokens + +let rec parseVariants (tokens: Token list) (acc: Variant list) : Result = + match tokens with + | TIdent variantName :: TOf :: rest when System.Char.IsUpper(variantName.[0]) -> + // Variant with payload: Variant of Type + parseVariantPayloadType rest + |> Result.bind (fun (payloadType, afterType) -> + let variant = { Name = variantName; Payload = Some payloadType } + match afterType with + | TBar :: rest' -> + // More variants + parseVariants rest' (variant :: acc) + | _ -> + // End of variants + Ok (List.rev (variant :: acc), afterType)) + | TIdent variantName :: rest when System.Char.IsUpper(variantName.[0]) -> + // Simple enum variant (no payload) + let variant = { Name = variantName; Payload = None } + match rest with + | TBar :: rest' -> + // More variants + parseVariants rest' (variant :: acc) + | _ -> + // End of variants (next token is not a bar) + Ok (List.rev (variant :: acc), rest) + | _ -> Error "Expected variant name (must start with uppercase letter)" + +/// Parse sum type variants with type parameter context: Variant1 | Variant2 of t | ... +/// Uses parseTypeWithContext to resolve type parameters +let rec parseVariantsWithContext (typeParams: string list) (tokens: Token list) (acc: Variant list) : Result = + let typeParamSet = Set.ofList typeParams + match tokens with + | TIdent variantName :: TOf :: rest when System.Char.IsUpper(variantName.[0]) -> + // Variant with payload: Variant of Type + parseVariantPayloadTypeWithContext typeParamSet rest + |> Result.bind (fun (payloadType, afterType) -> + let variant = { Name = variantName; Payload = Some payloadType } + match afterType with + | TBar :: rest' -> + // More variants + parseVariantsWithContext typeParams rest' (variant :: acc) + | _ -> + // End of variants + Ok (List.rev (variant :: acc), afterType)) + | TIdent variantName :: rest when System.Char.IsUpper(variantName.[0]) -> + // Simple enum variant (no payload) + let variant = { Name = variantName; Payload = None } + match rest with + | TBar :: rest' -> + // More variants + parseVariantsWithContext typeParams rest' (variant :: acc) + | _ -> + // End of variants (next token is not a bar) + Ok (List.rev (variant :: acc), rest) + | _ -> Error "Expected variant name (must start with uppercase letter)" + +/// Parse a qualified type name: Name or Stdlib.Result.Result +let rec parseQualifiedTypeName (firstName: string) (tokens: Token list) : string * Token list = + match tokens with + | TDot :: TIdent nextName :: rest when System.Char.IsUpper(nextName.[0]) -> + let (fullName, remaining) = parseQualifiedTypeName nextName rest + (firstName + "." + fullName, remaining) + | _ -> + (firstName, tokens) + +/// Parse a type definition: type Name = { fields } or type Name = Variant1 | Variant2 of Type | ... +/// Also supports type aliases: type Id = String, type MyList = List +/// Supports qualified type names: type Stdlib.Result.Result = Ok of T | Error of E +/// Supports generic types: type Result = Ok of t | Error of e +let parseTypeDef (tokens: Token list) : Result = + match tokens with + | TType :: TIdent firstName :: rest when System.Char.IsUpper(firstName.[0]) -> + // Parse potentially qualified type name + let (typeName, afterName) = parseQualifiedTypeName firstName rest + // Check for type parameters: + let parseBody typeParams afterTypeParams = + match afterTypeParams with + | TEquals :: TLBrace :: bodyRest -> + // Record type: type Name = { field: Type, ... } + let typeParamSet = Set.ofList typeParams + parseRecordFieldsWithContext typeParamSet bodyRest [] + |> Result.map (fun (fields, remaining) -> + (RecordDef (typeName, typeParams, fields), remaining)) + | TEquals :: TIdent variantName :: TOf :: bodyRest when System.Char.IsUpper(variantName.[0]) -> + // Sum type with first variant having payload: type Name = Variant of Type | ... + let typeParamSet = Set.ofList typeParams + parseVariantPayloadTypeWithContext typeParamSet bodyRest + |> Result.bind (fun (payloadType, afterType) -> + let firstVariant = { Name = variantName; Payload = Some payloadType } + match afterType with + | TBar :: rest' -> + // More variants + parseVariantsWithContext typeParams rest' [firstVariant] + |> Result.map (fun (variants, remaining) -> + (SumTypeDef (typeName, typeParams, variants), remaining)) + | _ -> + // Single variant sum type + Ok (SumTypeDef (typeName, typeParams, [firstVariant]), afterType)) + | TEquals :: TIdent variantName :: TBar :: bodyRest when System.Char.IsUpper(variantName.[0]) -> + // Sum type with multiple variants: type Name = Variant1 | Variant2 | ... + let firstVariant = { Name = variantName; Payload = None } + parseVariantsWithContext typeParams bodyRest [firstVariant] + |> Result.map (fun (variants, remaining) -> + (SumTypeDef (typeName, typeParams, variants), remaining)) + | TEquals :: TBar :: bodyRest -> + // Sum type where the first variant starts on the next line: + // type Name = + // | Variant1 + // | Variant2 of Type + parseVariantsWithContext typeParams bodyRest [] + |> Result.map (fun (variants, remaining) -> + (SumTypeDef (typeName, typeParams, variants), remaining)) + | TEquals :: rest' -> + // Could be a type alias or a single-variant sum type + // Try to parse as a type first + match rest' with + | TBar :: variantRest -> + parseVariantsWithContext typeParams variantRest [] + |> Result.map (fun (variants, remaining) -> + (SumTypeDef (typeName, typeParams, variants), remaining)) + | _ -> + let typeParamSet = Set.ofList typeParams + match parseTypeWithContext typeParamSet rest' with + | Ok (targetType, remaining) -> + // Decide: type alias or single-variant sum type? + // Rules: + // 1. Primitive types (Int64, String, etc.) → TYPE ALIAS + // 2. Generic types (List, Result) → TYPE ALIAS + // 3. Tuple types ((T, U)) → TYPE ALIAS + // 4. Function types ((T) -> U) → TYPE ALIAS + // 5. Simple name (TRecord): + // - Same name as type being defined → SUM TYPE (recursive variant) + // - End of input → SUM TYPE (backwards compat for single-variant enums) + // - Otherwise → TYPE ALIAS (reference to existing type) + match targetType with + | TRecord (potentialVariant, _) when potentialVariant = typeName -> + // Same name as type being defined - this is a recursive variant definition + // e.g., type Unit2 = Unit2 defines a sum type with variant Unit2 + let variant = { Name = potentialVariant; Payload = None } + Ok (SumTypeDef (typeName, typeParams, [variant]), remaining) + | TRecord (potentialVariant, _) when + // Not a primitive type and at end of input - treat as sum type for backwards compat + potentialVariant <> "Int64" && potentialVariant <> "Int32" && potentialVariant <> "Int16" && potentialVariant <> "Int8" && + potentialVariant <> "UInt64" && potentialVariant <> "UInt32" && potentialVariant <> "UInt16" && potentialVariant <> "UInt8" && + potentialVariant <> "Bool" && potentialVariant <> "String" && potentialVariant <> "Float" && + (match remaining with [] -> true | _ -> false) -> + let variant = { Name = potentialVariant; Payload = None } + Ok (SumTypeDef (typeName, typeParams, [variant]), remaining) + | _ -> + // Type alias for: + // - Primitive types (parsed as TInt64, TString, etc. directly by parseType) + // - Generic types (TSum with type args, TList) + // - Tuple types (TTuple) + // - Function types (TFunction) + // - User types with remaining tokens (assumed to be alias to existing type) + Ok (TypeAlias (typeName, typeParams, targetType), remaining) + | Error _ -> + Error "Expected type expression after '=' in type alias or variant name" + | _ -> Error "Expected '=' after type name in type definition" + match afterName with + | TLt :: rest' -> + // Generic type: type Name = ... + parseTypeParams rest' [] + |> Result.bind (fun (typeParams, afterParams) -> + parseBody typeParams afterParams) + | _ -> + // Non-generic type + parseBody [] afterName + | TType :: TIdent name :: _ when not (System.Char.IsUpper(name.[0])) -> + Error $"Type name must start with uppercase letter: {name}" + | _ -> Error "Expected type definition: type Name = { fields } or type Name = Variant1 | Variant2" + +/// Parse a qualified function name: name or Stdlib.Int64.add +let rec parseQualifiedFuncName (firstName: string) (tokens: Token list) : string * Token list = + match tokens with + | TDot :: TIdent nextName :: rest -> + let (fullName, remaining) = parseQualifiedFuncName nextName rest + (firstName + "." + fullName, remaining) + | _ -> + (firstName, tokens) + +let private generatedUnitParam (index: int) : string * Type = + ($"$unit{index}", TUnit) + +let private ensureParamGroupNonEmpty (paramIndex: int) (parameters: (string * Type) list) : (string * Type) list = + if List.isEmpty parameters then [generatedUnitParam paramIndex] else parameters + +/// Parse a function definition: def name(params) : type = body +/// Type parameters are optional: def name(params) : type = body is also valid +/// Qualified names supported: def Stdlib.Int64.add(params) : type = body +let parseFunctionDef (tokens: Token list) (parseExpr: Token list -> Result) : Result = + let rec parseAdditionalParamGroups + (parseGroup: Token list -> Result<(string * Type) list * Token list, string>) + (accParams: (string * Type) list) + (remaining: Token list) + : Result<(string * Type) list * Token list, string> = + match remaining with + | TRParen :: TLParen :: nextGroupStart -> + let nextGroupResult = + match nextGroupStart with + | TRParen :: _ -> Ok ([], nextGroupStart) + | _ -> parseGroup nextGroupStart + + nextGroupResult + |> Result.bind (fun (nextParams, nextRemaining) -> + let normalizedNextParams = ensureParamGroupNonEmpty (List.length accParams) nextParams + parseAdditionalParamGroups parseGroup (accParams @ normalizedNextParams) nextRemaining) + | _ -> + Ok (accParams, remaining) + + match tokens with + | TDef :: TIdent firstName :: rest -> + // Parse potentially qualified function name (e.g., Stdlib.Int64.add) + let (name, afterName) = parseQualifiedFuncName firstName rest + match afterName with + | TLt :: rest' -> + // Generic function: def name(...) + parseTypeParams rest' [] + |> Result.bind (fun (typeParams, afterTypeParams) -> + // Check for duplicate type parameters + if List.length typeParams <> (typeParams |> List.distinct |> List.length) then + Error "Duplicate type parameter names" + else + let typeParamsSet = Set.ofList typeParams + match afterTypeParams with + | TLParen :: paramsStart -> + // Parse parameters with type params in scope + let paramsResult = + match paramsStart with + | TRParen :: _ -> Ok ([], paramsStart) + | _ -> parseParamsWithContext typeParamsSet paramsStart [] + + paramsResult + |> Result.bind (fun (parameters, remaining) -> + let normalizedParameters = ensureParamGroupNonEmpty 0 parameters + parseAdditionalParamGroups + (fun toks -> parseParamsWithContext typeParamsSet toks []) + normalizedParameters + remaining + |> Result.bind (fun (allParameters, remainingWithGroups) -> + match remainingWithGroups with + | TRParen :: TColon :: rest'' -> + // Parse return type with type params in scope + parseTypeWithContext typeParamsSet rest'' + |> Result.bind (fun (returnType, remaining') -> + match remaining' with + | TEquals :: rest''' -> + // Parse body + parseExpr rest''' + |> Result.map (fun (body, remaining'') -> + let funcDef = { + Name = name + TypeParams = typeParams + Params = NonEmptyList.fromList allParameters + ReturnType = returnType + Body = body + } + (funcDef, remaining'')) + | _ -> Error "Expected '=' after function return type") + | _ -> Error "Expected ':' after function parameters")) + | _ -> Error "Expected '(' after type parameters") + | TLParen :: rest' -> + // Non-generic function: def name(...) + let paramsResult = + match rest' with + | TRParen :: _ -> Ok ([], rest') + | _ -> parseParams rest' [] + + paramsResult + |> Result.bind (fun (parameters, remaining) -> + let normalizedParameters = ensureParamGroupNonEmpty 0 parameters + parseAdditionalParamGroups + (fun toks -> parseParams toks []) + normalizedParameters + remaining + |> Result.bind (fun (allParameters, remainingWithGroups) -> + match remainingWithGroups with + | TRParen :: TColon :: rest'' -> + // Parse return type + parseType rest'' + |> Result.bind (fun (returnType, remaining') -> + match remaining' with + | TEquals :: rest''' -> + // Parse body + parseExpr rest''' + |> Result.map (fun (body, remaining'') -> + let funcDef = { + Name = name + TypeParams = [] + Params = NonEmptyList.fromList allParameters + ReturnType = returnType + Body = body + } + (funcDef, remaining'')) + | _ -> Error "Expected '=' after function return type") + | _ -> Error "Expected ':' after function parameters")) + | _ -> Error $"Expected '<' or '(' after function name '{name}'" + | _ -> Error "Expected function definition (def name(params) : type = body)" + +/// Parse a pattern for pattern matching +let rec parsePattern (tokens: Token list) : Result = + let canStartPatternPayload (toks: Token list) : bool = + match toks with + | TUnderscore :: _ + | TInt64 _ :: _ + | TInt128 _ :: _ + | TInt8 _ :: _ + | TInt16 _ :: _ + | TInt32 _ :: _ + | TUInt8 _ :: _ + | TUInt16 _ :: _ + | TUInt32 _ :: _ + | TUInt64 _ :: _ + | TUInt128 _ :: _ + | TMinus :: TInt64 _ :: _ + | TMinus :: TInt128 _ :: _ + | TMinus :: TInt8 _ :: _ + | TMinus :: TInt16 _ :: _ + | TMinus :: TInt32 _ :: _ + | TMinus :: TFloat _ :: _ + | TTrue :: _ + | TFalse :: _ + | TStringLit _ :: _ + | TCharLit _ :: _ + | TFloat _ :: _ + | TLParen :: _ + | TLBracket :: _ + | TIdent _ :: _ -> true + | _ -> false + + let rec parsePatternBase (toks: Token list) : Result = + match toks with + | TUnderscore :: rest -> + // Wildcard pattern: _ + Ok (PWildcard, rest) + | TInt64 n :: rest -> + // Integer literal pattern (Int64) + Ok (PInt64 n, rest) + | TInt128 n :: rest -> + Ok (PInt128Literal n, rest) + | TInt8 n :: rest -> + Ok (PInt8Literal n, rest) + | TInt16 n :: rest -> + Ok (PInt16Literal n, rest) + | TInt32 n :: rest -> + Ok (PInt32Literal n, rest) + | TUInt8 n :: rest -> + Ok (PUInt8Literal n, rest) + | TUInt16 n :: rest -> + Ok (PUInt16Literal n, rest) + | TUInt32 n :: rest -> + Ok (PUInt32Literal n, rest) + | TUInt64 n :: rest -> + Ok (PUInt64Literal n, rest) + | TUInt128 n :: rest -> + Ok (PUInt128Literal n, rest) + | TMinus :: TInt64 n :: rest -> + // Negative integer literal pattern + Ok (PInt64 (-n), rest) + | TMinus :: TInt128 n :: rest when n = System.Int128.MinValue -> + Ok (PInt128Literal System.Int128.MinValue, rest) + | TMinus :: TInt128 n :: rest -> + Ok (PInt128Literal (-n), rest) + | TMinus :: TInt8 n :: rest -> + Ok (PInt8Literal (sbyte (-int n)), rest) + | TMinus :: TInt16 n :: rest -> + Ok (PInt16Literal (int16 (-int n)), rest) + | TMinus :: TInt32 n :: rest -> + Ok (PInt32Literal (-n), rest) + | TMinus :: TFloat f :: rest -> + Ok (PFloat (-f), rest) + | TTrue :: rest -> + // Boolean true pattern + Ok (PBool true, rest) + | TFalse :: rest -> + // Boolean false pattern + Ok (PBool false, rest) + | TStringLit s :: rest -> + // String literal pattern + Ok (PString s, rest) + | TCharLit s :: rest -> + Ok (PChar s, rest) + | TFloat f :: rest -> + // Float literal pattern + Ok (PFloat f, rest) + | TLParen :: TRParen :: rest -> + // Unit pattern: () + Ok (PUnit, rest) + | TLParen :: rest -> + // Parenthesized pattern or tuple pattern: (p) / (a, b, c) + parseTuplePattern rest [] + | TLBrace :: _ -> + // Anonymous record pattern is no longer supported + Error "Record pattern requires type name: use 'TypeName { field = pattern, ... }'" + | TLBracket :: rest -> + // List pattern: [a, b, c] or [] + parseListPattern rest [] + | TIdent typeName :: TLBrace :: rest when System.Char.IsUpper(typeName.[0]) -> + // Record pattern with type name: Point { x = a, y = b } + parseRecordPatternWithTypeName typeName rest [] + | TIdent name :: rest when System.Char.IsUpper(name.[0]) -> + // Constructor pattern, optionally with interpreter-style payload: Some x + if canStartPatternPayload rest then + parsePattern rest + |> Result.map (fun (payloadPattern, remaining) -> + (PConstructor (name, Some payloadPattern), remaining)) + else + Ok (PConstructor (name, None), rest) + | TIdent name :: rest -> + // Variable pattern: x (binds the value) + Ok (PVar name, rest) + | _ -> Error "Expected pattern (_, variable, literal, or constructor)" + + let rec parseConsTail (headPattern: Pattern) (remaining: Token list) : Result = + let rec normalizeConsPattern (headPatterns: Pattern list) (tailPattern: Pattern) : Pattern = + match tailPattern with + | PList listTail -> + // a :: b :: [c; d] ==> [a; b; c; d] + PList (headPatterns @ listTail) + | PListCons (moreHeads, tail) -> + // Flatten chained cons heads while preserving order. + normalizeConsPattern (headPatterns @ moreHeads) tail + | _ -> + PListCons (headPatterns, tailPattern) + + match remaining with + | TCons :: rest -> + parsePattern rest + |> Result.map (fun (tailPattern, rest') -> + match tailPattern with + | PListCons (tailHead, tailRest) -> + (normalizeConsPattern (headPattern :: tailHead) tailRest, rest') + | _ -> + (normalizeConsPattern [headPattern] tailPattern, rest')) + | _ -> + Ok (headPattern, remaining) + + parsePatternBase tokens + |> Result.bind (fun (headPattern, remaining) -> + parseConsTail headPattern remaining) + +and parseTuplePattern (tokens: Token list) (acc: Pattern list) : Result = + parsePattern tokens + |> Result.bind (fun (pat, remaining) -> + match remaining with + | TRParen :: rest -> + // End of parenthesized / tuple pattern + let patterns = List.rev (pat :: acc) + match patterns with + | [single] -> Ok (single, rest) + | _ -> Ok (PTuple patterns, rest) + | TComma :: rest -> + // More elements + parseTuplePattern rest (pat :: acc) + | _ -> Error "Expected ',' or ')' in tuple pattern") + +and parseRecordPatternWithTypeName (typeName: string) (tokens: Token list) (acc: (string * Pattern) list) : Result = + // Parse record pattern with explicit type name: TypeName { field = pattern, ... } + match tokens with + | TRBrace :: rest -> + // Empty record or end of fields + let fields = List.rev acc + Ok (PRecord (typeName, fields), rest) + | TIdent fieldName :: TEquals :: rest -> + parsePattern rest + |> Result.bind (fun (pat, remaining) -> + let field = (fieldName, pat) + match remaining with + | TRBrace :: rest' -> + // End of record pattern + let fields = List.rev (field :: acc) + Ok (PRecord (typeName, fields), rest') + | (TComma | TSemicolon) :: rest' -> + // More fields + parseRecordPatternWithTypeName typeName rest' (field :: acc) + | _ -> Error "Expected ',' or '}' in record pattern") + | _ -> Error "Expected field name in record pattern" + +and parseListPattern (tokens: Token list) (acc: Pattern list) : Result = + match tokens with + | TRBracket :: rest -> + // Empty list or end of list pattern + Ok (PList (List.rev acc), rest) + | TDotDotDot :: rest -> + // Rest pattern at start: [...t] + parsePattern rest + |> Result.bind (fun (tailPat, remaining) -> + match remaining with + | TRBracket :: rest' -> + Ok (PListCons (List.rev acc, tailPat), rest') + | _ -> Error "Expected ']' after rest pattern") + | _ -> + parsePattern tokens + |> Result.bind (fun (pat, remaining) -> + match remaining with + | TRBracket :: rest -> + // End of list pattern + Ok (PList (List.rev (pat :: acc)), rest) + | (TSemicolon | TComma) :: TDotDotDot :: rest -> + // Rest pattern after element: [a, b, ...t] + parsePattern rest + |> Result.bind (fun (tailPat, remaining') -> + match remaining' with + | TRBracket :: rest' -> + Ok (PListCons (List.rev (pat :: acc), tailPat), rest') + | _ -> Error "Expected ']' after rest pattern") + | (TSemicolon | TComma) :: rest -> + // More elements + parseListPattern rest (pat :: acc) + | _ -> Error "Expected ';', ',', or ']' in list pattern") + +/// Parse a single case: | pat1 | pat2 when guard -> expr +/// Supports multiple patterns (pattern grouping) and optional guard clause +let parseCase (tokens: Token list) (parseExprFn: Token list -> Result) : Result = + // Parse patterns until we see TWhen or TArrow + let rec parsePatterns (toks: Token list) (acc: Pattern list) : Result = + match toks with + | TBar :: rest -> + parsePattern rest + |> Result.bind (fun (pattern, remaining) -> + // Check what comes next + match remaining with + | TBar :: _ -> + // Another pattern in the group + parsePatterns remaining (pattern :: acc) + | TWhen :: _ | TArrow :: _ -> + // End of patterns, followed by guard or body + Ok (List.rev (pattern :: acc), remaining) + | _ -> Error "Expected '|', 'when', or '->' after pattern") + | _ -> Error "Expected '|' before pattern" + + parsePatterns tokens [] + |> Result.bind (fun (patterns, remaining) -> + // Convert patterns list to NonEmptyList (safe since parsePatterns ensures at least one pattern) + let patternsNel = NonEmptyList.fromList patterns + // Parse optional guard + match remaining with + | TWhen :: rest' -> + // Parse guard expression + parseExprFn rest' + |> Result.bind (fun (guard, remaining') -> + match remaining' with + | TArrow :: rest'' -> + // Parse body + parseExprFn rest'' + |> Result.map (fun (body, remaining''') -> + ({ Patterns = patternsNel; Guard = Some guard; Body = body }, remaining''')) + | _ -> Error "Expected '->' after guard expression") + | TArrow :: rest' -> + // No guard, parse body directly + parseExprFn rest' + |> Result.map (fun (body, remaining') -> + ({ Patterns = patternsNel; Guard = None; Body = body }, remaining')) + | _ -> Error "Expected 'when' or '->' after pattern") + +/// Parser: convert tokens to AST +let parse (tokens: Token list) : Result = + // Recursive descent parser with operator precedence + // Precedence (low to high): or < and < comparison < +/- < */ < unary + + // Stable lambda seed for generated implicit type variables. + // Uses parse-order instead of token-list length so pretty-print roundtrips + // preserve equivalent lambda variable naming. + let mutable lambdaSeedCounter = 0 + + let nextLambdaSeed () : int = + let current = lambdaSeedCounter + lambdaSeedCounter <- lambdaSeedCounter + 1 + current + + let implicitLambdaTypeVarName + (lambdaSeed: int) + (paramIndex: int) + (paramName: string) + : string = + $"__interp_lambda_{lambdaSeed}_{paramIndex}_{paramName}" + + let startsWithNegativeNumericLiteral (toks: Token list) : bool = + match toks with + | TMinus :: TInt64 _ :: _ + | TMinus :: TInt128 _ :: _ + | TMinus :: TInt8 _ :: _ + | TMinus :: TInt16 _ :: _ + | TMinus :: TInt32 _ :: _ + | TMinus :: TFloat _ :: _ -> true + | _ -> false + + let canStartApplicationArg (toks: Token list) : bool = + match toks with + | TInt64 _ :: _ + | TInt128 _ :: _ + | TInt8 _ :: _ + | TInt16 _ :: _ + | TInt32 _ :: _ + | TUInt8 _ :: _ + | TUInt16 _ :: _ + | TUInt32 _ :: _ + | TUInt64 _ :: _ + | TUInt128 _ :: _ + | TFloat _ :: _ + | TStringLit _ :: _ + | TCharLit _ :: _ + | TTrue :: _ + | TFalse :: _ + | TIdent _ :: _ + | TLParen :: _ + | TLBrace :: _ + | TLBracket :: _ + | TFun :: _ -> true + | _ -> false + + let isRecordFieldBoundary (toks: Token list) : bool = + match toks with + | TIdent _ :: TEquals :: _ -> true + | _ -> false + + let canStartNegativeNumericApplicationArg (callee: Expr) (toks: Token list) : bool = + if not (startsWithNegativeNumericLiteral toks) then + false + else + match callee with + // Keep subtraction precedence for bare variables (`x - 1L`), + // but allow negative numeric literals as call args in contexts + // that are clearly call-like in interpreter syntax. + | Var funcName when funcName.Contains "." -> true + | Call _ | TypeApp _ | Apply _ | Constructor _ -> true + | _ -> false + + let rec canAcceptSpaceApplication (expr: Expr) : bool = + match expr with + | Var _ | Call _ | TypeApp _ | Lambda _ | FuncRef _ | Closure _ -> true + | Constructor _ -> true + | Apply _ -> true + // Allow values that can evaluate to callable values, such as `record.fn`. + | RecordAccess _ | TupleAccess _ -> true + | _ -> false + + let appendCallArg (callee: Expr) (argExpr: Expr) : Expr = + match callee with + | Var funcName -> Call (funcName, NonEmptyList.singleton argExpr) + | Call (funcName, args) -> Call (funcName, NonEmptyList.snoc args argExpr) + | TypeApp (funcName, typeArgs, args) -> + match NonEmptyList.toList args with + | [UnitLiteral] -> TypeApp (funcName, typeArgs, NonEmptyList.singleton argExpr) + | _ -> TypeApp (funcName, typeArgs, NonEmptyList.snoc args argExpr) + | Constructor (typeName, variantName, None) -> Constructor (typeName, variantName, Some argExpr) + | Apply (funcExpr, existingArgs) -> + match funcExpr with + // Preserve uncurried lambda applications as a single Apply node + // while still allowing curried chains to remain left-associated. + | Lambda (parameters, _) when NonEmptyList.length existingArgs < NonEmptyList.length parameters -> + Apply (funcExpr, NonEmptyList.snoc existingArgs argExpr) + | _ -> + Apply (callee, NonEmptyList.singleton argExpr) + | _ -> Apply (callee, NonEmptyList.singleton argExpr) + + /// Parse multiple cases for pattern matching: | p1 -> e1 | p2 -> e2 ... + let rec parseCases (toks: Token list) (acc: MatchCase list) : Result = + match toks with + | TBar :: _ -> + // Another case + parseCase toks parseExpr + |> Result.bind (fun (case, remaining) -> + parseCases remaining (case :: acc)) + | _ -> + // End of cases + if List.isEmpty acc then + Error "Match expression must have at least one case" + else + Ok (List.rev acc, toks) + + and parseExpr (toks: Token list) : Result = + match toks with + | TLet :: rest -> + // Parse: let pattern = value in body + // Supports simple let (let x = ...) and pattern matching (let (a, b) = ...) + parsePattern rest + |> Result.bind (fun (pattern, remaining) -> + let buildLetExpression (value: Expr) (body: Expr) (remaining'': Token list) = + match pattern with + | PVar name -> (Let (name, value, body), remaining'') + | _ -> (Match (value, [{ Patterns = NonEmptyList.singleton pattern; Guard = None; Body = body }]), remaining'') + match remaining with + | TEquals :: rest' -> + let tryParseWithoutInFallback () : Result = + // Upstream interpreter syntax allows newline-delimited let bindings: + // let x = + // + // but lexer discards newlines. Recover this by trying all prefix/suffix + // splits after '=' and choosing the split that leaves the smallest + // remaining token tail after parsing the body. + let betterSplit + (currentBest: (Expr * Token list) option) + (candidate: Expr * Token list) + : (Expr * Token list) option = + match currentBest with + | None -> + Some candidate + | Some (_, bestRemaining) -> + let (_, candidateRemaining) = candidate + if List.length candidateRemaining < List.length bestRemaining then + Some candidate + else + currentBest + + let rec trySplits + (valueTokensRev: Token list) + (remainingTokens: Token list) + (bestCandidate: (Expr * Token list) option) + : Result = + match remainingTokens with + | [] -> + match bestCandidate with + | Some best -> Ok best + | None -> Error "Expected expression" + | nextToken :: restTokens -> + let candidateValueTokens = List.rev (nextToken :: valueTokensRev) + let updatedBest = + match parseExpr candidateValueTokens with + | Ok (candidateValue, []) -> + match parseExpr restTokens with + | Ok (candidateBody, remainingAfterBody) -> + buildLetExpression candidateValue candidateBody remainingAfterBody + |> betterSplit bestCandidate + | Error _ -> + bestCandidate + | _ -> + bestCandidate + + trySplits (nextToken :: valueTokensRev) restTokens updatedBest + trySplits [] rest' None + + match parseExpr rest' with + | Ok (value, remaining') -> + match remaining' with + | TIn :: rest'' -> + parseExpr rest'' + |> Result.map (fun (body, remaining'') -> + buildLetExpression value body remaining'') + | _ -> + match parseExpr remaining' with + | Ok (body, remaining'') -> + Ok (buildLetExpression value body remaining'') + | Error _ -> + tryParseWithoutInFallback () + | Error _ -> + tryParseWithoutInFallback () + | _ -> Error "Expected '=' after let binding pattern") + | TIf :: rest -> + // Parse: if cond then thenBranch [elif cond then branch ...] [else elseBranch] + // Elif chains are represented as nested else-if AST nodes. + let rec parseElseOrElif (tokens: Token list) : Result = + match tokens with + | TElse :: elseTokens -> + parseExpr elseTokens + | TElif :: elifTokens -> + parseExpr elifTokens + |> Result.bind (fun (elifCond, afterElifCond) -> + match afterElifCond with + | TThen :: elifThenTokens -> + parseExpr elifThenTokens + |> Result.bind (fun (elifThenBranch, afterElifThen) -> + parseElseOrElif afterElifThen + |> Result.map (fun (elifElseBranch, afterElifElse) -> + (If (elifCond, elifThenBranch, elifElseBranch), afterElifElse))) + | _ -> + Error "Expected 'then' after elif condition") + | _ -> + Ok (UnitLiteral, tokens) + + parseExpr rest + |> Result.bind (fun (cond, remaining) -> + match remaining with + | TThen :: rest' -> + parseExpr rest' + |> Result.bind (fun (thenBranch, remaining') -> + parseElseOrElif remaining' + |> Result.map (fun (elseBranch, remaining'') -> + (If (cond, thenBranch, elseBranch), remaining''))) + | _ -> Error "Expected 'then' after if condition") + | TMatch :: rest -> + // Parse: match scrutinee with | p1 -> e1 | p2 -> e2 + parseExpr rest + |> Result.bind (fun (scrutinee, remaining) -> + match remaining with + | TWith :: rest' -> + parseCases rest' [] + |> Result.map (fun (cases, remaining') -> + (Match (scrutinee, cases), remaining')) + | _ -> Error "Expected 'with' after match scrutinee") + | _ -> + parsePipe toks + + and parsePipe (toks: Token list) : Result = + // Pipe operator |> has lowest precedence, left-associative + // x |> f desugars to f(x) - Call if f is a name, Apply if f is an expression + parseOr toks + |> Result.bind (fun (left, remaining) -> + let rec parsePipeRest (leftExpr: Expr) (toks: Token list) : Result = + match toks with + | TPipe :: rest -> + parseOr rest + |> Result.bind (fun (right, remaining') -> + // Desugar: left |> right + // Pipe passes left as the FIRST argument to right + // This matches Dark/Darklang convention where data comes first + let pipedExpr = + match right with + | Var funcName -> + // Simple function reference: f becomes f(left) + Call (funcName, NonEmptyList.singleton leftExpr) + | Call (funcName, args) -> + // Partial application: f(a) becomes f(left, a) + match NonEmptyList.toList args with + | [UnitLiteral] -> + // Zero-arg call placeholder: f() |> g() => g(f()) + Call (funcName, NonEmptyList.singleton leftExpr) + | _ -> + Call (funcName, NonEmptyList.cons leftExpr args) + | TypeApp (funcName, typeArgs, args) -> + // Generic partial application: f(a) becomes f(left, a) + match NonEmptyList.toList args with + | [UnitLiteral] -> + // Zero-arg call placeholder: f() |> g() => g(f()) + TypeApp (funcName, typeArgs, NonEmptyList.singleton leftExpr) + | _ -> + TypeApp (funcName, typeArgs, NonEmptyList.cons leftExpr args) + | _ -> + // Lambda or other expression: apply left to it + Apply (right, NonEmptyList.singleton leftExpr) + parsePipeRest pipedExpr remaining') + | _ -> Ok (leftExpr, toks) + parsePipeRest left remaining) + + and parseOr (toks: Token list) : Result = + parseAnd toks + |> Result.bind (fun (left, remaining) -> + let rec parseOrRest (leftExpr: Expr) (toks: Token list) : Result = + match toks with + | TOr :: rest -> + parseAnd rest + |> Result.bind (fun (right, remaining') -> + parseOrRest (BinOp (Or, leftExpr, right)) remaining') + | _ -> Ok (leftExpr, toks) + parseOrRest left remaining) + + and parseAnd (toks: Token list) : Result = + parseBitOr toks + |> Result.bind (fun (left, remaining) -> + let rec parseAndRest (leftExpr: Expr) (toks: Token list) : Result = + match toks with + | TAnd :: rest -> + parseBitOr rest + |> Result.bind (fun (right, remaining') -> + parseAndRest (BinOp (And, leftExpr, right)) remaining') + | _ -> Ok (leftExpr, toks) + parseAndRest left remaining) + + and parseBitOr (toks: Token list) : Result = + parseBitXor toks + |> Result.bind (fun (left, remaining) -> + let rec parseBitOrRest (leftExpr: Expr) (toks: Token list) : Result = + match toks with + | TBitOr :: rest -> + parseBitXor rest + |> Result.bind (fun (right, remaining') -> + parseBitOrRest (BinOp (BitOr, leftExpr, right)) remaining') + | _ -> Ok (leftExpr, toks) + parseBitOrRest left remaining) + + and parseBitXor (toks: Token list) : Result = + parseBitAnd toks + |> Result.bind (fun (left, remaining) -> + let rec parseBitXorRest (leftExpr: Expr) (toks: Token list) : Result = + match toks with + | TBitXor :: rest -> + parseBitAnd rest + |> Result.bind (fun (right, remaining') -> + parseBitXorRest (BinOp (BitXor, leftExpr, right)) remaining') + | _ -> Ok (leftExpr, toks) + parseBitXorRest left remaining) + + and parseBitAnd (toks: Token list) : Result = + parseComparison toks + |> Result.bind (fun (left, remaining) -> + let rec parseBitAndRest (leftExpr: Expr) (toks: Token list) : Result = + match toks with + | TBitAnd :: rest -> + parseComparison rest + |> Result.bind (fun (right, remaining') -> + parseBitAndRest (BinOp (BitAnd, leftExpr, right)) remaining') + | _ -> Ok (leftExpr, toks) + parseBitAndRest left remaining) + + and parseComparison (toks: Token list) : Result = + parseShift toks + |> Result.bind (fun (left, remaining) -> + // Comparison operators are non-associative (no chaining) + match remaining with + | TEqEq :: rest -> + parseShift rest + |> Result.map (fun (right, remaining') -> + (BinOp (Eq, left, right), remaining')) + | TNeq :: rest -> + parseShift rest + |> Result.map (fun (right, remaining') -> + (BinOp (Neq, left, right), remaining')) + | TLt :: rest -> + parseShift rest + |> Result.map (fun (right, remaining') -> + (BinOp (Lt, left, right), remaining')) + | TGt :: rest -> + parseShift rest + |> Result.map (fun (right, remaining') -> + (BinOp (Gt, left, right), remaining')) + | TLte :: rest -> + parseShift rest + |> Result.map (fun (right, remaining') -> + (BinOp (Lte, left, right), remaining')) + | TGte :: rest -> + parseShift rest + |> Result.map (fun (right, remaining') -> + (BinOp (Gte, left, right), remaining')) + | _ -> Ok (left, remaining)) + + and parseShift (toks: Token list) : Result = + parseAdditive toks + |> Result.bind (fun (left, remaining) -> + let rec parseShiftRest (leftExpr: Expr) (toks: Token list) : Result = + match toks with + | TShl :: rest -> + parseAdditive rest + |> Result.bind (fun (right, remaining') -> + parseShiftRest (BinOp (Shl, leftExpr, right)) remaining') + | TShr :: rest -> + parseAdditive rest + |> Result.bind (fun (right, remaining') -> + parseShiftRest (BinOp (Shr, leftExpr, right)) remaining') + | _ -> Ok (leftExpr, toks) + parseShiftRest left remaining) + + and parseAdditive (toks: Token list) : Result = + parseMultiplicative toks + |> Result.bind (fun (left, remaining) -> + let rec parseAdditiveRest (leftExpr: Expr) (toks: Token list) : Result = + match toks with + | TPlus :: rest -> + parseMultiplicative rest + |> Result.bind (fun (right, remaining') -> + parseAdditiveRest (BinOp (Add, leftExpr, right)) remaining') + | TMinus :: rest -> + parseMultiplicative rest + |> Result.bind (fun (right, remaining') -> + parseAdditiveRest (BinOp (Sub, leftExpr, right)) remaining') + | TPlusPlus :: rest -> + parseMultiplicative rest + |> Result.bind (fun (right, remaining') -> + parseAdditiveRest (BinOp (StringConcat, leftExpr, right)) remaining') + | _ -> Ok (leftExpr, toks) + parseAdditiveRest left remaining) + + and parseMultiplicative (toks: Token list) : Result = + parseUnary toks + |> Result.bind (fun (left, remaining) -> + let rec parseMultiplicativeRest (leftExpr: Expr) (toks: Token list) : Result = + match toks with + | TStar :: rest -> + parseUnary rest + |> Result.bind (fun (right, remaining') -> + parseMultiplicativeRest (BinOp (Mul, leftExpr, right)) remaining') + | TSlash :: rest -> + parseUnary rest + |> Result.bind (fun (right, remaining') -> + parseMultiplicativeRest (BinOp (Div, leftExpr, right)) remaining') + | TPercent :: rest -> + parseUnary rest + |> Result.bind (fun (right, remaining') -> + parseMultiplicativeRest (BinOp (Mod, leftExpr, right)) remaining') + | _ -> Ok (leftExpr, toks) + parseMultiplicativeRest left remaining) + + and parseUnary (toks: Token list) : Result = + match toks with + // Negative integer literals - parse directly as negative values + | TMinus :: TInt64 n :: rest -> Ok (Int64Literal (-n), rest) + | TMinus :: TInt128 n :: rest when n = System.Int128.MinValue -> + Ok (Int128Literal System.Int128.MinValue, rest) + | TMinus :: TInt128 n :: rest -> Ok (Int128Literal (-n), rest) + | TMinus :: TInt8 n :: rest when n = System.SByte.MinValue -> + Ok (Int8Literal System.SByte.MinValue, rest) + | TMinus :: TInt8 n :: rest -> Ok (Int8Literal (-n), rest) + | TMinus :: TInt16 n :: rest when n = System.Int16.MinValue -> + Ok (Int16Literal System.Int16.MinValue, rest) + | TMinus :: TInt16 n :: rest -> Ok (Int16Literal (-n), rest) + | TMinus :: TInt32 n :: rest when n = System.Int32.MinValue -> + Ok (Int32Literal System.Int32.MinValue, rest) + | TMinus :: TInt32 n :: rest -> Ok (Int32Literal (-n), rest) + | TMinus :: TFloat f :: rest -> Ok (FloatLiteral (-f), rest) + | TMinus :: rest -> + // For non-literal expressions, use UnaryOp + parseUnary rest + |> Result.map (fun (expr, remaining) -> (UnaryOp (Neg, expr), remaining)) + | TNot :: rest -> + parseUnary rest + |> Result.map (fun (expr, remaining) -> (UnaryOp (Not, expr), remaining)) + | TBitNot :: rest -> + parseUnary rest + |> Result.map (fun (expr, remaining) -> (UnaryOp (BitNot, expr), remaining)) + | _ -> + parsePrimary toks + + and parsePrimary (toks: Token list) : Result = + // Parse a primary expression, then handle postfix operations and + // interpreter-style space application: f x y + parsePrimaryBase toks + |> Result.bind (fun (expr, remaining) -> + parsePostfix expr remaining + |> Result.bind (fun (postfixExpr, remaining') -> + parseApplication postfixExpr remaining')) + + and parseApplication (callee: Expr) (toks: Token list) : Result = + let negativeNumericArg = canStartNegativeNumericApplicationArg callee toks + let hasCallableCallee = canAcceptSpaceApplication callee + if hasCallableCallee && not (isRecordFieldBoundary toks) && (negativeNumericArg || canStartApplicationArg toks) then + // Parse exactly one argument, then continue left-associatively. + // Negative numeric literals are tokenized as `-` + literal. + // Parse those with unary parsing so expressions like `f -1.0` become + // function application rather than subtraction from `f`. + let parseOneArg () : Result = + if negativeNumericArg then + parseUnary toks + else + parsePrimaryBase toks + |> Result.bind (fun (argBaseExpr, afterArgBase) -> + parsePostfix argBaseExpr afterArgBase) + + parseOneArg () + |> Result.bind (fun (argExpr, afterArg) -> + let applied = appendCallArg callee argExpr + parseApplication applied afterArg) + else + Ok (callee, toks) + + // Parse a qualified identifier chain: Stdlib.Int64.add + // Returns the full qualified name and remaining tokens + and parseQualifiedIdent (firstName: string) (toks: Token list) : string * Token list = + match toks with + | TDot :: TIdent nextName :: rest -> + // Continue the chain: firstName.nextName... + let (fullName, remaining) = parseQualifiedIdent nextName rest + (firstName + "." + fullName, remaining) + | _ -> + // End of chain + (firstName, toks) + + and parsePrimaryBase (toks: Token list) : Result = + match toks with + | TInt64 n :: rest -> Ok (Int64Literal n, rest) + | TInt128 n :: rest -> Ok (Int128Literal n, rest) + | TInt8 n :: rest -> Ok (Int8Literal n, rest) + | TInt16 n :: rest -> Ok (Int16Literal n, rest) + | TInt32 n :: rest -> Ok (Int32Literal n, rest) + | TUInt8 n :: rest -> Ok (UInt8Literal n, rest) + | TUInt16 n :: rest -> Ok (UInt16Literal n, rest) + | TUInt32 n :: rest -> Ok (UInt32Literal n, rest) + | TUInt64 n :: rest -> Ok (UInt64Literal n, rest) + | TUInt128 n :: rest -> Ok (UInt128Literal n, rest) + | TFloat f :: rest -> Ok (FloatLiteral f, rest) + | TStringLit s :: rest -> Ok (StringLiteral s, rest) + | TCharLit s :: rest -> Ok (CharLiteral s, rest) + | TInterpString parts :: rest -> + // Parse interpolated string into AST.InterpolatedString + let rec parseInterpParts (parts: InterpPart list) (acc: AST.StringPart list) : Result = + match parts with + | [] -> Ok (List.rev acc) + | InterpText s :: remaining -> + parseInterpParts remaining (AST.StringText s :: acc) + | InterpTokens tokens :: remaining -> + // Parse the tokens as an expression + match parseExpr (tokens @ [TEOF]) with + | Ok (expr, [TEOF]) -> + parseInterpParts remaining (AST.StringExpr expr :: acc) + | Ok (_, leftover) -> + Error $"Unexpected tokens after interpolated expression: {leftover}" + | Error err -> + Error $"Error parsing interpolated expression: {err}" + match parseInterpParts parts [] with + | Ok astParts -> Ok (InterpolatedString astParts, rest) + | Error err -> Error err + | TTrue :: rest -> Ok (BoolLiteral true, rest) + | TFalse :: rest -> Ok (BoolLiteral false, rest) + | TFun :: rest -> + // Interpreter lambda syntax: fun x y -> body + let lambdaSeed = nextLambdaSeed () + + let rec parseFunParameters + (toks: Token list) + (paramIndex: int) + (acc: (string * Type * Pattern option) list) + : Result<(string * Type * Pattern option) list * Token list, string> = + match toks with + | TArrow :: remaining when not (List.isEmpty acc) -> + Ok (List.rev acc, remaining) + | TUnderscore :: remaining -> + let syntheticParamName = $"lambdaWildcard{lambdaSeed}_{paramIndex}" + let typeVarName = implicitLambdaTypeVarName lambdaSeed paramIndex syntheticParamName + parseFunParameters + remaining + (paramIndex + 1) + ((syntheticParamName, TVar typeVarName, None) :: acc) + | TIdent name :: remaining when not (System.Char.IsUpper(name.[0])) -> + let typeVarName = implicitLambdaTypeVarName lambdaSeed paramIndex name + parseFunParameters + remaining + (paramIndex + 1) + ((name, TVar typeVarName, None) :: acc) + | TLParen :: TIdent name :: TColon :: remaining when not (System.Char.IsUpper(name.[0])) -> + parseType remaining + |> Result.bind (fun (paramType, afterType) -> + match afterType with + | TRParen :: remaining' -> + parseFunParameters + remaining' + (paramIndex + 1) + ((name, paramType, None) :: acc) + | _ -> Error "Expected ')' after typed lambda parameter") + | TLParen :: _ -> + parsePattern toks + |> Result.bind (fun (pattern, remaining) -> + match pattern with + | PVar name -> + let typeVarName = + implicitLambdaTypeVarName lambdaSeed paramIndex name + parseFunParameters + remaining + (paramIndex + 1) + ((name, TVar typeVarName, None) :: acc) + | _ -> + let syntheticParamName = $"lambdaPattern{lambdaSeed}_{paramIndex}" + let typeVarName = + implicitLambdaTypeVarName + lambdaSeed + paramIndex + syntheticParamName + parseFunParameters + remaining + (paramIndex + 1) + ((syntheticParamName, TVar typeVarName, Some pattern) :: acc)) + | _ -> Error "Expected one or more parameters before '->' in fun expression" + + parseFunParameters rest 0 [] + |> Result.bind (fun (parsedParameters, bodyStart) -> + parseExpr bodyStart + |> Result.map (fun (body, remaining) -> + let parameters = + parsedParameters + |> List.map (fun (paramName, paramType, _) -> (paramName, paramType)) + + let patternBindings = + parsedParameters + |> List.choose (fun (paramName, _, bindingPattern) -> + match bindingPattern with + | Some pattern -> Some (paramName, pattern) + | None -> None) + + let bodyWithPatternBindings = + List.foldBack (fun (paramName, pattern) innerBody -> + Match ( + Var paramName, + [ + { + Patterns = NonEmptyList.singleton pattern + Guard = None + Body = innerBody + } + ] + )) patternBindings body + + // Preserve typed lambdas as multi-parameter AST for stable + // parser/pretty roundtrips. Curry fully-untyped interpreter + // lambdas (`fun x y -> ...`) to match upstream behavior for + // partial application. + let isImplicitInterpreterParamType (ty: Type) : bool = + match ty with + | TVar typeVarName -> typeVarName.StartsWith "__interp_lambda_" + | _ -> false + + let shouldCurry = + parameters + |> List.map snd + |> List.forall isImplicitInterpreterParamType + + if shouldCurry then + let rec buildCurriedLambda + (remainingParams: (string * Type) list) + (innerBody: Expr) + : Expr = + match remainingParams with + | [] -> innerBody + | param :: restParams -> + Lambda (NonEmptyList.singleton param, buildCurriedLambda restParams innerBody) + + (buildCurriedLambda parameters bodyWithPatternBindings, remaining) + else + (Lambda (NonEmptyList.fromList parameters, bodyWithPatternBindings), remaining))) + // Qualified identifier: Stdlib.Int64.add, Module.func, or Stdlib.Result.Result.Ok + | TIdent name :: TDot :: TIdent nextName :: rest when System.Char.IsUpper(name.[0]) -> + // Parse the full qualified name + let (qualifiedTail, afterQualified) = parseQualifiedIdent nextName rest + let fullName = name + "." + qualifiedTail + // Check if the last segment is uppercase (constructor) or lowercase (function) + let lastDotIdx = fullName.LastIndexOf('.') + let lastSegment = if lastDotIdx >= 0 then fullName.Substring(lastDotIdx + 1) else fullName + let isConstructor = System.Char.IsUpper(lastSegment.[0]) + // Check what follows - function call, constructor, or variable reference + match afterQualified with + | TLBrace :: recordFieldsStart when isConstructor -> + // Qualified record literal: Module.TypeName { field = value, ... } + parseRecordLiteralFieldsWithTypeName fullName recordFieldsStart [] + | _ when isConstructor -> + let typeName = fullName.Substring(0, lastDotIdx) + let variantName = lastSegment + if canStartApplicationArg afterQualified + && not (isRecordFieldBoundary afterQualified) then + // Qualified constructor with interpreter-style payload: + // Stdlib.Option.Option.Some 5L + parsePrimaryBase afterQualified + |> Result.bind (fun (payloadBase, afterPayloadBase) -> + parsePostfix payloadBase afterPayloadBase + |> Result.map (fun (payloadExpr, remaining) -> + (Constructor (typeName, variantName, Some payloadExpr), remaining))) + else + // Qualified constructor without payload: Stdlib.Color.Red + Ok (Constructor (typeName, variantName, None), afterQualified) + | TLParen :: TRParen :: rest -> + // Qualified zero-arg call: Stdlib.Module.fn() + Ok (Call (fullName, NonEmptyList.singleton UnitLiteral), rest) + | TLt :: typeArgsStart -> + // Qualified generic function call: Stdlib.List.length(args) + // Accept whenever we can successfully parse a type argument list. + let looksLikeTypeArgs tokens = + match parseTypeArgs tokens [] with + | Ok _ -> true + | Error _ -> false + if looksLikeTypeArgs typeArgsStart then + parseTypeArgs typeArgsStart [] + |> Result.map (fun (typeArgs, afterTypes) -> + // Interpreter parser always expects argument application to be + // space-based (handled by parseApplication). + (TypeApp (fullName, typeArgs, NonEmptyList.singleton UnitLiteral), afterTypes)) + else + // Not type args, treat as variable reference and leave < for comparison + Ok (Var fullName, TLt :: typeArgsStart) + | _ -> + // Qualified variable reference (function as value) + Ok (Var fullName, afterQualified) + | TIdent name :: TLParen :: TRParen :: rest when not (System.Char.IsUpper(name.[0])) -> + // Zero-arg call: fn() + Ok (Call (name, NonEmptyList.singleton UnitLiteral), rest) + | TIdent name :: TLt :: rest when not (System.Char.IsUpper(name.[0])) -> + // Could be generic function call: name(args) + // Or could be comparison: name < expr + // Disambiguate by checking whether a full type argument list parses. + let looksLikeGenericCall tokens = + match parseTypeArgs tokens [] with + | Ok _ -> true + | Error _ -> false + if looksLikeGenericCall rest then + // Parse as generic call + parseTypeArgs rest [] + |> Result.map (fun (typeArgs, afterTypes) -> + // Interpreter parser always expects argument application to be + // space-based (handled by parseApplication). + (TypeApp (name, typeArgs, NonEmptyList.singleton UnitLiteral), afterTypes)) + else + // Not a type application, treat name as variable and let comparison parsing handle < + Ok (Var name, TLt :: rest) + | TIdent typeName :: TLBrace :: rest when System.Char.IsUpper(typeName.[0]) -> + // Record literal with type name: Point { x = 1, y = 2 } + parseRecordLiteralFieldsWithTypeName typeName rest [] + | TIdent name :: rest when System.Char.IsUpper(name.[0]) -> + // Constructor, optionally with interpreter-style payload: Some 5L + if canStartApplicationArg rest && not (isRecordFieldBoundary rest) then + parsePrimaryBase rest + |> Result.bind (fun (payloadBaseExpr, afterPayloadBase) -> + parsePostfix payloadBaseExpr afterPayloadBase + |> Result.map (fun (payloadExpr, remaining) -> + (Constructor ("", name, Some payloadExpr), remaining))) + else + Ok (Constructor ("", name, None), rest) + | TIdent name :: rest -> + // Variable reference (lowercase identifier) + Ok (Var name, rest) + | TLParen :: TRParen :: rest -> + // Unit literal: () + Ok (UnitLiteral, rest) + | TLParen :: rest -> + // Could be parenthesized expression, tuple literal, or operator section + // Check for operator section: (&&), (||), (+), (-), (*), (/), etc. + let parsePipeOperatorSection + (op: BinOp) + (paramType: Type) + (afterOp: Token list) + : Result = + parseUnary afterOp + |> Result.map (fun (rightArg, remaining) -> + let lambda = + Lambda (NonEmptyList.singleton ("$pipe_arg", paramType), BinOp (op, Var "$pipe_arg", rightArg)) + (lambda, remaining)) + let parseGeneratedPipeOperatorSection + (sectionName: string) + (op: BinOp) + (afterOp: Token list) + : Result = + let sectionType = + TVar $"__interp_pipe_{sectionName}_section_{List.length rest}_{List.length afterOp}" + parsePipeOperatorSection op sectionType afterOp + match rest with + | TAnd :: TRParen :: afterOp -> + // (&&) - operator section, parse the right operand + parsePipeOperatorSection And TBool afterOp + | TOr :: TRParen :: afterOp -> + // (||) - operator section + parsePipeOperatorSection Or TBool afterOp + | TPlus :: TRParen :: afterOp -> + parseGeneratedPipeOperatorSection "add" Add afterOp + | TMinus :: TRParen :: afterOp -> + parseGeneratedPipeOperatorSection "sub" Sub afterOp + | TStar :: TRParen :: afterOp -> + parseGeneratedPipeOperatorSection "mul" Mul afterOp + | TSlash :: TRParen :: afterOp -> + parseGeneratedPipeOperatorSection "div" Div afterOp + | TPercent :: TRParen :: afterOp -> + parseGeneratedPipeOperatorSection "mod" Mod afterOp + | TEqEq :: TRParen :: afterOp -> + parseGeneratedPipeOperatorSection "eq" Eq afterOp + | TNeq :: TRParen :: afterOp -> + parseGeneratedPipeOperatorSection "neq" Neq afterOp + | TLt :: TRParen :: afterOp -> + parseGeneratedPipeOperatorSection "lt" Lt afterOp + | TGt :: TRParen :: afterOp -> + parseGeneratedPipeOperatorSection "gt" Gt afterOp + | TLte :: TRParen :: afterOp -> + parseGeneratedPipeOperatorSection "lte" Lte afterOp + | TGte :: TRParen :: afterOp -> + parseGeneratedPipeOperatorSection "gte" Gte afterOp + | TBitAnd :: TRParen :: afterOp -> + parseGeneratedPipeOperatorSection "bitand" BitAnd afterOp + | TBitOr :: TRParen :: afterOp -> + parseGeneratedPipeOperatorSection "bitor" BitOr afterOp + | TBitXor :: TRParen :: afterOp -> + parseGeneratedPipeOperatorSection "bitxor" BitXor afterOp + | TShl :: TRParen :: afterOp -> + parseGeneratedPipeOperatorSection "shl" Shl afterOp + | TShr :: TRParen :: afterOp -> + parseGeneratedPipeOperatorSection "shr" Shr afterOp + | TPlusPlus :: TRParen :: afterOp -> + parsePipeOperatorSection StringConcat AST.TString afterOp + | _ -> + parseExpr rest + |> Result.bind (fun (firstExpr, remaining) -> + match remaining with + | TRParen :: rest' -> + // Parenthesized expression (single element) + Ok (firstExpr, rest') + | TComma :: rest' -> + // Tuple literal: (expr, expr, ...) + parseTupleElements rest' [firstExpr] + | TLet :: _ -> + // Upstream interpreter syntax can contain parenthesized + // expression sequences where a trailing `let` introduces the + // final expression value, for example: + // (expr1 + // expr2 + // let x = expr3 + // expr4) + // By the time we reach this branch, `parseExpr` has consumed + // the leading sequence head; parse the trailing let-expression + // and sequence it after the head expression. + parseExpr remaining + |> Result.bind (fun (nextExpr, remaining') -> + match remaining' with + | TRParen :: rest' -> + Ok ( + Match ( + firstExpr, + [ + { + Patterns = NonEmptyList.singleton PWildcard + Guard = None + Body = nextExpr + } + ] + ), + rest' + ) + | _ -> + Error "Expected ')' after parenthesized let-sequence expression") + | _ -> Error "Expected ')' or ',' in tuple/parenthesized expression") + | TLBrace :: rest -> + // Distinguish between: + // - anonymous record literal: { field = value, ... } + // - record update: { recordExpr with field = value, ... } + match rest with + | TRBrace :: _ -> + parseRecordLiteralFieldsWithTypeName "" rest [] + | TIdent _ :: TEquals :: _ -> + parseRecordLiteralFieldsWithTypeName "" rest [] + | _ -> + // Parse as record update syntax. + parseExpr rest + |> Result.bind (fun (recordExpr, afterExpr) -> + match afterExpr with + | TWith :: afterWith -> + // Record update: { record with field = value, ... } + parseRecordUpdateFields afterWith [] + |> Result.map (fun (updates, remaining) -> + (RecordUpdate (recordExpr, updates), remaining)) + | _ -> Error "Record update requires 'with' keyword: use '{ record with field = value, ... }'") + | TLBracket :: rest -> + // List literal: [1L; 2L; 3L] or [] + parseListLiteralElements rest [] + | _ -> Error "Expected expression" + + and parseTupleElements (toks: Token list) (acc: Expr list) : Result = + // Parse remaining tuple elements after the first comma + parseExpr toks + |> Result.bind (fun (expr, remaining) -> + match remaining with + | TComma :: rest -> + // More elements + parseTupleElements rest (expr :: acc) + | TRParen :: rest -> + // End of tuple + let elements = List.rev (expr :: acc) + Ok (TupleLiteral elements, rest) + | _ -> Error "Expected ',' or ')' in tuple literal") + + and parseRecordLiteralFieldsWithTypeName (typeName: string) (toks: Token list) (acc: (string * Expr) list) : Result = + // Parse record literal fields with explicit type name: TypeName { name = expr, ... } + match toks with + | TRBrace :: rest -> + // Empty record or end of fields + Ok (RecordLiteral (typeName, List.rev acc), rest) + | TIdent fieldName :: TEquals :: rest -> + parseExpr rest + |> Result.bind (fun (value, remaining) -> + match remaining with + | (TComma | TSemicolon) :: rest' -> + // More fields + parseRecordLiteralFieldsWithTypeName typeName rest' ((fieldName, value) :: acc) + | TIdent _ :: TEquals :: _ -> + // Support newline-delimited field lists in upstream interpreter syntax. + parseRecordLiteralFieldsWithTypeName typeName remaining ((fieldName, value) :: acc) + | TRBrace :: rest' -> + // End of record + Ok (RecordLiteral (typeName, List.rev ((fieldName, value) :: acc)), rest') + | _ -> Error "Expected ',' or '}' after record field value") + | _ -> Error "Expected field name in record literal" + + and parseRecordUpdateFields (toks: Token list) (acc: (string * Expr) list) : Result<(string * Expr) list * Token list, string> = + // Parse record update fields: field = expr, field = expr, ... } + match toks with + | TRBrace :: rest -> + // End of fields + Ok (List.rev acc, rest) + | TIdent fieldName :: TEquals :: rest -> + parseExpr rest + |> Result.bind (fun (value, remaining) -> + match remaining with + | (TComma | TSemicolon) :: rest' -> + // More fields + parseRecordUpdateFields rest' ((fieldName, value) :: acc) + | TIdent _ :: TEquals :: _ -> + // Support newline-delimited update fields. + parseRecordUpdateFields remaining ((fieldName, value) :: acc) + | TRBrace :: rest' -> + // End of record update + Ok (List.rev ((fieldName, value) :: acc), rest') + | _ -> Error "Expected ',' or '}' after record update field value") + | _ -> Error "Expected field name in record update" + + and parseListLiteralElements (toks: Token list) (acc: Expr list) : Result = + // Parse list literal elements: + // [expr; expr; ...] or [] or [a; b; ...rest] + match toks with + | TRBracket :: rest -> + // Empty list or end of list + Ok (ListLiteral (List.rev acc), rest) + | TDotDotDot :: rest -> + // Spread at start: [...tail] + parseExpr rest + |> Result.bind (fun (tailExpr, remaining) -> + match remaining with + | TRBracket :: rest' -> + Ok (ListCons (List.rev acc, tailExpr), rest') + | _ -> Error "Expected ']' after spread expression") + | _ -> + parseExpr toks + |> Result.bind (fun (expr, remaining) -> + match remaining with + | (TSemicolon | TComma) :: TDotDotDot :: rest -> + // Spread after elements: [a, b, ...tail] + parseExpr rest + |> Result.bind (fun (tailExpr, remaining') -> + match remaining' with + | TRBracket :: rest' -> + Ok (ListCons (List.rev (expr :: acc), tailExpr), rest') + | _ -> Error "Expected ']' after spread expression") + | (TSemicolon | TComma) :: rest -> + // More elements + parseListLiteralElements rest (expr :: acc) + | _ when canStartApplicationArg remaining || startsWithNegativeNumericLiteral remaining -> + // Upstream interpreter tests often format list elements on + // separate lines without explicit ';' separators. + parseListLiteralElements remaining (expr :: acc) + | TRBracket :: rest -> + // End of list + Ok (ListLiteral (List.rev (expr :: acc)), rest) + | _ -> Error "Expected ';', ',', or ']' in list literal") + + and parsePostfix (expr: Expr) (toks: Token list) : Result = + // Handle postfix operations: tuple access (.0, .1), field access (.fieldName), + // and optional parenthesized call arguments. + match toks with + | TDot :: TInt64 index :: rest -> + if index < 0L then + Error "Tuple index cannot be negative" + else + let accessExpr = TupleAccess (expr, int index) + parsePostfix accessExpr rest + | TDot :: TIdent fieldName :: rest -> + // Record field access + let accessExpr = RecordAccess (expr, fieldName) + parsePostfix accessExpr rest + | TLParen :: rest -> + // Optional call syntax for interpreter compatibility: + // f(a, b), g(), (fun x -> x)(1) + // Keep existing `f (x)` behavior for single parenthesized args. + let rec hasTopLevelComma (depth: int) (ts: Token list) : bool = + match ts with + | [] -> false + | TComma :: _ when depth = 0 -> true + | TLParen :: more -> hasTopLevelComma (depth + 1) more + | TRParen :: _ when depth = 0 -> false + | TRParen :: more -> hasTopLevelComma (depth - 1) more + | _ :: more -> hasTopLevelComma depth more + let shouldUseCallSyntax = + match rest with + | TRParen :: _ -> true + | _ -> hasTopLevelComma 0 rest + if shouldUseCallSyntax then + match expr with + | Var _ -> + // Keep `f (x)` as application with a parenthesized argument. + Ok (expr, toks) + | _ -> + parseCallArgs rest [] + |> Result.bind (fun (args, remaining) -> + let appliedExpr = + match expr with + | Call (funcName, existingArgs) -> + Call (funcName, NonEmptyList.appendList existingArgs (NonEmptyList.toList args)) + | TypeApp (funcName, typeArgs, existingArgs) -> + match NonEmptyList.toList existingArgs with + | [UnitLiteral] -> + TypeApp (funcName, typeArgs, args) + | _ -> + TypeApp ( + funcName, + typeArgs, + NonEmptyList.appendList existingArgs (NonEmptyList.toList args) + ) + | Constructor (typeName, variantName, None) -> + match NonEmptyList.toList args with + | [singleArg] -> + Constructor (typeName, variantName, Some singleArg) + | _ -> + Apply (expr, args) + | _ -> + Apply (expr, args) + parsePostfix appliedExpr remaining) + else + Ok (expr, toks) + | _ -> Ok (expr, toks) + + and parseCallArgs (toks: Token list) (acc: Expr list) : Result * Token list, string> = + match toks with + | TRParen :: rest -> + // End of argument list (including zero-arg calls). + let reversed = List.rev acc + let normalizedArgs = + match reversed with + | [] -> NonEmptyList.singleton UnitLiteral + | _ -> NonEmptyList.fromList reversed + Ok (normalizedArgs, rest) + | _ -> + parseExpr toks + |> Result.bind (fun (argExpr, remaining) -> + match remaining with + | TComma :: rest -> + parseCallArgs rest (argExpr :: acc) + | TRParen :: rest -> + Ok (NonEmptyList.fromList (List.rev (argExpr :: acc)), rest) + | _ -> Error "Expected ',' or ')' after function argument") + + // Parse top-level elements (functions or expressions) + let rec parseTopLevels (toks: Token list) (acc: TopLevel list) : Result = + match toks with + | TSemicolon :: rest -> + // Optional top-level separator in interpreter pretty-printed programs. + parseTopLevels rest acc + | TLBracket :: TLt :: rest -> + // Top-level attributes (for example `[]`) are metadata markers. + // The shared AST does not currently represent attributes, so consume + // and ignore them before parsing the next top-level declaration. + let rec consumeAttribute (remaining: Token list) : Result = + match remaining with + | TGt :: TRBracket :: afterAttr -> + Ok afterAttr + | TEOF :: _ -> + Error "Unterminated top-level attribute (missing '>]')" + | _ :: afterToken -> + consumeAttribute afterToken + | [] -> + Error "Unterminated top-level attribute (missing '>]')" + consumeAttribute rest + |> Result.bind (fun remaining -> + parseTopLevels remaining acc) + | TEOF :: [] -> + // End of input + if List.isEmpty acc then + Error "Empty program" + else + Ok (Program (List.rev acc)) + + | TDef :: _ -> + // Parse function definition + parseFunctionDef toks parseExpr + |> Result.bind (fun (funcDef, remaining) -> + parseTopLevels remaining (FunctionDef funcDef :: acc)) + + | TLet :: TIdent firstName :: TLParen :: rest -> + // Interpreter-style top-level function definition: + // let name(args) : ReturnType = body + parseFunctionDef (TDef :: TIdent firstName :: TLParen :: rest) parseExpr + |> Result.bind (fun (funcDef, remaining) -> + parseTopLevels remaining (FunctionDef funcDef :: acc)) + + | TLet :: TIdent firstName :: TLt :: rest -> + // Interpreter-style generic top-level function definition: + // let name(args) : ReturnType = body + parseFunctionDef (TDef :: TIdent firstName :: TLt :: rest) parseExpr + |> Result.bind (fun (funcDef, remaining) -> + parseTopLevels remaining (FunctionDef funcDef :: acc)) + + | TType :: _ -> + // Parse type definition + parseTypeDef toks + |> Result.bind (fun (typeDef, remaining) -> + parseTopLevels remaining (TypeDef typeDef :: acc)) + + | _ -> + // Parse expression + parseExpr toks + |> Result.bind (fun (expr, remaining) -> + // Support bare tuple syntax at top level: `1L, 2L, 3L`. + // Commas inside other contexts (calls/records/lists) are already + // consumed before we reach this point. + let rec parseTupleTail (tupleItemsRev: Expr list) (toks': Token list) : Result = + match toks' with + | TComma :: rest -> + parseExpr rest + |> Result.bind (fun (nextExpr, remaining') -> + parseTupleTail (nextExpr :: tupleItemsRev) remaining') + | _ -> + let finalExpr = + match tupleItemsRev with + | [] -> expr + | _ -> TupleLiteral (expr :: List.rev tupleItemsRev) + Ok (finalExpr, toks') + + parseTupleTail [] remaining + |> Result.bind (fun (finalExpr, remaining') -> + match remaining' with + | TEOF :: [] -> + // Single expression program + Ok (Program (List.rev (Expression finalExpr :: acc))) + | _ -> + // More top-level definitions after expression not allowed for now + Error "Unexpected tokens after expression (only function definitions can be followed by more definitions)")) + + parseTopLevels tokens [] + +let private isInternalIdentifier (name: string) : bool = + let isAllUnderscores = name |> Seq.forall (fun c -> c = '_') + (name.StartsWith("__") && not isAllUnderscores) || name.Contains(".__") + +let private validateNoInternalIdentifier (name: string) : Result = + if isInternalIdentifier name then + Error $"Internal identifier not allowed in user code: {name}" + else + Ok () + +let rec private validatePattern (pattern: Pattern) : Result = + match pattern with + | PVar name -> validateNoInternalIdentifier name + | PConstructor (_, payload) -> + match payload with + | None -> Ok () + | Some inner -> validatePattern inner + | PTuple patterns -> + patterns + |> List.fold (fun acc p -> Result.bind (fun () -> validatePattern p) acc) (Ok ()) + | PRecord (_, fields) -> + fields + |> List.fold (fun acc (_, p) -> Result.bind (fun () -> validatePattern p) acc) (Ok ()) + | PList patterns -> + patterns + |> List.fold (fun acc p -> Result.bind (fun () -> validatePattern p) acc) (Ok ()) + | PListCons (head, tail) -> + let headResult = + head |> List.fold (fun acc p -> Result.bind (fun () -> validatePattern p) acc) (Ok ()) + Result.bind (fun () -> validatePattern tail) headResult + | PUnit + | PWildcard + | PInt64 _ + | PInt128Literal _ + | PInt8Literal _ + | PInt16Literal _ + | PInt32Literal _ + | PUInt8Literal _ + | PUInt16Literal _ + | PUInt32Literal _ + | PUInt64Literal _ + | PUInt128Literal _ + | PBool _ + | PString _ + | PChar _ + | PFloat _ -> Ok () + +let rec private validateExpr (expr: Expr) : Result = + match expr with + | Let (name, value, body) -> + validateNoInternalIdentifier name + |> Result.bind (fun () -> validateExpr value) + |> Result.bind (fun () -> validateExpr body) + | Var name -> validateNoInternalIdentifier name + | Call (funcName, args) -> + validateNoInternalIdentifier funcName + |> Result.bind (fun () -> + args + |> NonEmptyList.toList + |> List.fold (fun acc arg -> Result.bind (fun () -> validateExpr arg) acc) (Ok ())) + | TypeApp (funcName, _, args) -> + validateNoInternalIdentifier funcName + |> Result.bind (fun () -> + args + |> NonEmptyList.toList + |> List.fold (fun acc arg -> Result.bind (fun () -> validateExpr arg) acc) (Ok ())) + | InterpolatedString parts -> + parts + |> List.fold (fun acc part -> + match part with + | StringText _ -> acc + | StringExpr inner -> Result.bind (fun () -> validateExpr inner) acc) (Ok ()) + | BinOp (_, left, right) -> + validateExpr left |> Result.bind (fun () -> validateExpr right) + | UnaryOp (_, inner) -> validateExpr inner + | If (cond, thenBranch, elseBranch) -> + validateExpr cond + |> Result.bind (fun () -> validateExpr thenBranch) + |> Result.bind (fun () -> validateExpr elseBranch) + | TupleLiteral elems -> + elems |> List.fold (fun acc e -> Result.bind (fun () -> validateExpr e) acc) (Ok ()) + | TupleAccess (tupleExpr, _) -> validateExpr tupleExpr + | RecordLiteral (_, fields) -> + fields |> List.fold (fun acc (_, e) -> Result.bind (fun () -> validateExpr e) acc) (Ok ()) + | RecordUpdate (recordExpr, updates) -> + validateExpr recordExpr + |> Result.bind (fun () -> + updates |> List.fold (fun acc (_, e) -> Result.bind (fun () -> validateExpr e) acc) (Ok ())) + | RecordAccess (recordExpr, _) -> validateExpr recordExpr + | Constructor (_, _, payload) -> + match payload with + | None -> Ok () + | Some inner -> validateExpr inner + | Match (scrutinee, cases) -> + let validateCase (case: MatchCase) : Result = + let patternsResult = + case.Patterns + |> NonEmptyList.toList + |> List.fold (fun acc p -> Result.bind (fun () -> validatePattern p) acc) (Ok ()) + patternsResult + |> Result.bind (fun () -> + match case.Guard with + | None -> Ok () + | Some guardExpr -> validateExpr guardExpr) + |> Result.bind (fun () -> validateExpr case.Body) + validateExpr scrutinee + |> Result.bind (fun () -> + cases |> List.fold (fun acc case -> Result.bind (fun () -> validateCase case) acc) (Ok ())) + | ListLiteral elems -> + elems |> List.fold (fun acc e -> Result.bind (fun () -> validateExpr e) acc) (Ok ()) + | ListCons (head, tail) -> + let headResult = head |> List.fold (fun acc e -> Result.bind (fun () -> validateExpr e) acc) (Ok ()) + Result.bind (fun () -> validateExpr tail) headResult + | Lambda (parameters, body) -> + parameters + |> NonEmptyList.toList + |> List.fold (fun acc (name, _) -> Result.bind (fun () -> validateNoInternalIdentifier name) acc) (Ok ()) + |> Result.bind (fun () -> validateExpr body) + | Apply (funcExpr, args) -> + validateExpr funcExpr + |> Result.bind (fun () -> + args + |> NonEmptyList.toList + |> List.fold (fun acc e -> Result.bind (fun () -> validateExpr e) acc) (Ok ())) + | FuncRef funcName -> validateNoInternalIdentifier funcName + | Closure (funcName, captures) -> + validateNoInternalIdentifier funcName + |> Result.bind (fun () -> + captures |> List.fold (fun acc e -> Result.bind (fun () -> validateExpr e) acc) (Ok ())) + | UnitLiteral | Int64Literal _ | Int128Literal _ | Int8Literal _ | Int16Literal _ | Int32Literal _ + | UInt8Literal _ | UInt16Literal _ | UInt32Literal _ | UInt64Literal _ | UInt128Literal _ + | BoolLiteral _ | StringLiteral _ | CharLiteral _ | FloatLiteral _ -> Ok () + +let private validateNoInternalIdentifiers (Program items) : Result = + let validateTopLevel (item: TopLevel) : Result = + match item with + | FunctionDef def -> + validateNoInternalIdentifier def.Name + |> Result.bind (fun () -> + def.Params + |> NonEmptyList.toList + |> List.fold (fun acc (name, _) -> Result.bind (fun () -> validateNoInternalIdentifier name) acc) (Ok ())) + |> Result.bind (fun () -> validateExpr def.Body) + | TypeDef _ -> Ok () + | Expression expr -> validateExpr expr + items + |> List.fold (fun acc item -> Result.bind (fun () -> validateTopLevel item) acc) (Ok ()) + |> Result.map (fun () -> Program items) + +/// Parse a string directly to AST +let parseString (allowInternal: bool) (input: string) : Result = + lex input + |> Result.bind parse + |> Result.bind (fun program -> + if allowInternal then Ok program + else validateNoInternalIdentifiers program) diff --git a/backend/src/LibCompiler/passes/1_Parser.fs b/backend/src/LibCompiler/passes/1_Parser.fs new file mode 100644 index 0000000000..e6284d517e --- /dev/null +++ b/backend/src/LibCompiler/passes/1_Parser.fs @@ -0,0 +1,2368 @@ +// 1_Parser.fs - Lexer and Parser (Pass 1) +// +// Transforms source code (string) into an Abstract Syntax Tree (AST). +// +// Lexer: Converts source string into tokens +// Parser: Recursive descent parser with operator precedence +// +// Operator precedence (specific to this parser): +// - Multiplication and division bind tighter than addition and subtraction +// - Operators are left-associative: "1 + 2 + 3" parses as "(1 + 2) + 3" +// - Parentheses for explicit grouping +// +// Example: +// "2 + 3 * 4" → BinOp(Add, Int64Literal(2), BinOp(Mul, Int64Literal(3), Int64Literal(4))) + +module Parser + +open AST + +/// Part of an interpolated string token +type InterpPart = + | InterpText of string // Literal text + | InterpTokens of Token list // Tokens for an expression (will be parsed later) + +/// Token types for lexer +and Token = + | TInt64 of int64 // Default integer (Int64) + | TInt128 of System.Int128 // 128-bit signed: 1Q + | TInt8 of sbyte // 8-bit signed: 1y + | TInt16 of int16 // 16-bit signed: 1s + | TInt32 of int32 // 32-bit signed: 1l + | TUInt8 of byte // 8-bit unsigned: 1uy + | TUInt16 of uint16 // 16-bit unsigned: 1us + | TUInt32 of uint32 // 32-bit unsigned: 1ul + | TUInt64 of uint64 // 64-bit unsigned: 1UL + | TUInt128 of System.UInt128 // 128-bit unsigned: 1Z + | TFloat of float + | TStringLit of string // String literal token (named to avoid conflict with AST.TString type) + | TCharLit of string // Char literal: 'x' (stores UTF-8 string for EGC support) + | TInterpString of InterpPart list // Interpolated string: $"Hello {name}!" + | TTrue + | TFalse + | TPlus + | TPlusPlus // ++ (string concatenation) + | TMinus + | TStar + | TSlash + | TLParen + | TRParen + | TLet + | TIn + | TIf // if + | TThen // then + | TElse // else + | TDef // def (function definition) + | TType // type (type definition) + | TColon // : (type annotation) + | TComma // , (parameter separator) + | TDot // . (tuple/record access) + | TLBrace // { (record literal) + | TRBrace // } (record literal) + | TBar // | (sum type variant separator / pattern separator) + | TOf // of (sum type payload) + | TMatch // match (pattern matching) + | TWith // with (pattern matching) + | TArrow // -> (pattern matching) + | TFatArrow // => (lambda) + | TUnderscore // _ (wildcard pattern) + | TWhen // when (guard clause in pattern matching) + | TLBracket // [ (list literal) + | TRBracket // ] (list literal) + | TEquals // = (assignment in let) + | TEqEq // == (equality comparison) + | TNeq // != + | TLt // < + | TGt // > + | TLte // <= + | TGte // >= + | TAnd // && + | TOr // || + | TNot // ! + | TPipe // |> (pipe operator) + | TDotDotDot // ... (rest pattern in lists) + | TPercent // % (modulo) + | TShl // << (left shift) + | TShr // >> (right shift) + | TBitAnd // & (bitwise and) + | TBitOr // ||| (bitwise or) + | TBitXor // ^ (bitwise xor) + | TBitNot // ~~~ (bitwise not) + | TIdent of string + | TEOF + +/// Lexer: convert string to list of tokens +let lex (input: string) : Result = + let rec lexHelper (chars: char list) (acc: Token list) : Result = + match chars with + | [] -> Ok (List.rev (TEOF :: acc)) + | ' ' :: rest | '\t' :: rest | '\n' :: rest | '\r' :: rest -> + // Skip whitespace + lexHelper rest acc + | '+' :: '+' :: rest -> lexHelper rest (TPlusPlus :: acc) + | '+' :: rest -> lexHelper rest (TPlus :: acc) + | '-' :: '>' :: rest -> lexHelper rest (TArrow :: acc) + | '-' :: rest -> lexHelper rest (TMinus :: acc) + | '=' :: '>' :: rest -> lexHelper rest (TFatArrow :: acc) + | '*' :: rest -> lexHelper rest (TStar :: acc) + | '/' :: '/' :: rest -> + // Skip line comment: // ... until end of line + let rec skipToEndOfLine (cs: char list) : char list = + match cs with + | [] -> [] + | '\n' :: remaining -> remaining + | '\r' :: '\n' :: remaining -> remaining + | '\r' :: remaining -> remaining + | _ :: remaining -> skipToEndOfLine remaining + lexHelper (skipToEndOfLine rest) acc + | '/' :: rest -> lexHelper rest (TSlash :: acc) + | '(' :: rest -> lexHelper rest (TLParen :: acc) + | ')' :: rest -> lexHelper rest (TRParen :: acc) + | '{' :: rest -> lexHelper rest (TLBrace :: acc) + | '}' :: rest -> lexHelper rest (TRBrace :: acc) + | '[' :: rest -> lexHelper rest (TLBracket :: acc) + | ']' :: rest -> lexHelper rest (TRBracket :: acc) + | ':' :: rest -> lexHelper rest (TColon :: acc) + | ',' :: rest -> lexHelper rest (TComma :: acc) + | '.' :: '.' :: '.' :: rest -> lexHelper rest (TDotDotDot :: acc) + | '.' :: rest -> lexHelper rest (TDot :: acc) + | '=' :: '=' :: rest -> lexHelper rest (TEqEq :: acc) + | '=' :: rest -> lexHelper rest (TEquals :: acc) + | '!' :: '=' :: rest -> lexHelper rest (TNeq :: acc) + | '!' :: rest -> lexHelper rest (TNot :: acc) + | '<' :: '<' :: rest -> lexHelper rest (TShl :: acc) + | '<' :: '=' :: rest -> lexHelper rest (TLte :: acc) + | '<' :: rest -> lexHelper rest (TLt :: acc) + | '>' :: '>' :: rest -> lexHelper rest (TShr :: acc) + | '>' :: '=' :: rest -> lexHelper rest (TGte :: acc) + | '>' :: rest -> lexHelper rest (TGt :: acc) + | '&' :: '&' :: rest -> lexHelper rest (TAnd :: acc) + | '&' :: rest -> lexHelper rest (TBitAnd :: acc) + | '^' :: rest -> lexHelper rest (TBitXor :: acc) + | '~' :: '~' :: '~' :: rest -> lexHelper rest (TBitNot :: acc) + | '%' :: rest -> lexHelper rest (TPercent :: acc) + | '|' :: '|' :: '|' :: rest -> lexHelper rest (TBitOr :: acc) + | '|' :: '|' :: rest -> lexHelper rest (TOr :: acc) + | '|' :: '>' :: rest -> lexHelper rest (TPipe :: acc) + | '|' :: rest -> lexHelper rest (TBar :: acc) + | '`' :: '`' :: rest -> + // Backtick-escaped identifiers: ``name`` (including keyword-like names). + let rec parseBacktickIdent (cs: char list) (chars: char list) : Result = + match cs with + | '`' :: '`' :: remaining -> + let ident = System.String(List.rev chars |> List.toArray) + if ident.Length = 0 then + Error "Backtick identifier cannot be empty" + else + Ok (ident, remaining) + | '\n' :: _ | '\r' :: _ -> + Error "Unterminated backtick identifier" + | c :: remaining -> + parseBacktickIdent remaining (c :: chars) + | [] -> + Error "Unterminated backtick identifier" + + parseBacktickIdent rest [] + |> Result.bind (fun (ident, remaining) -> + lexHelper remaining (TIdent ident :: acc)) + | '`' :: _ -> + Error "Backtick identifiers must use double backticks: ``name``" + | c :: _ when System.Char.IsLetter(c) || c = '_' -> + // Parse identifier or keyword + let rec parseIdent (cs: char list) (chars: char list) : string * char list = + match cs with + | c :: rest when System.Char.IsLetterOrDigit(c) || c = '_' || c = '\'' -> + parseIdent rest (c :: chars) + | _ -> + let ident = System.String(List.rev chars |> List.toArray) + (ident, cs) + + let (ident, remaining) = parseIdent chars [] + let token = + match ident with + | "let" -> TLet + | "in" -> TIn + | "if" -> TIf + | "then" -> TThen + | "else" -> TElse + | "def" -> TDef + | "type" -> TType + | "of" -> TOf + | "match" -> TMatch + | "with" -> TWith + | "when" -> TWhen + | "true" -> TTrue + | "false" -> TFalse + | "_" -> TUnderscore + | _ -> TIdent ident + lexHelper remaining (token :: acc) + | c :: _ when System.Char.IsDigit(c) -> + // Parse number (integer or float) + // First collect all digits + let rec collectDigits (cs: char list) (acc: char list) : char list * char list = + match cs with + | d :: rest when System.Char.IsDigit(d) -> collectDigits rest (d :: acc) + | _ -> (List.rev acc, cs) + + let (intDigits, afterInt) = collectDigits chars [] + + // Check if this is a float (has decimal point or exponent) + match afterInt with + | '.' :: rest when not (List.isEmpty rest) && System.Char.IsDigit(List.head rest) -> + // Float with decimal point: 3.14 + let (fracDigits, afterFrac) = collectDigits rest [] + // Check for exponent + match afterFrac with + | ('e' :: rest' | 'E' :: rest') -> + // Scientific notation: 3.14e10 or 3.14e-10 + let (expSign, afterSign) = + match rest' with + | '+' :: r -> (['+'], r) + | '-' :: r -> (['-'], r) + | _ -> ([], rest') + let (expDigits, remaining) = collectDigits afterSign [] + if List.isEmpty expDigits then + Error "Expected exponent digits after 'e'" + else + let numStr = System.String(Array.ofList (intDigits @ ['.'] @ fracDigits @ ['e'] @ expSign @ expDigits)) + match System.Double.TryParse(numStr, System.Globalization.NumberStyles.Float, System.Globalization.CultureInfo.InvariantCulture) with + | (true, value) -> lexHelper remaining (TFloat value :: acc) + | (false, _) -> Error $"Invalid float literal: {numStr}" + | _ -> + // Float without exponent: 3.14 + let numStr = System.String(Array.ofList (intDigits @ ['.'] @ fracDigits)) + match System.Double.TryParse(numStr, System.Globalization.NumberStyles.Float, System.Globalization.CultureInfo.InvariantCulture) with + | (true, value) -> lexHelper afterFrac (TFloat value :: acc) + | (false, _) -> Error $"Invalid float literal: {numStr}" + | ('e' :: rest | 'E' :: rest) -> + // Scientific notation without decimal: 1e10 or 1e-10 + let (expSign, afterSign) = + match rest with + | '+' :: r -> (['+'], r) + | '-' :: r -> (['-'], r) + | _ -> ([], rest) + let (expDigits, remaining) = collectDigits afterSign [] + if List.isEmpty expDigits then + Error "Expected exponent digits after 'e'" + else + let numStr = System.String(Array.ofList (intDigits @ ['e'] @ expSign @ expDigits)) + match System.Double.TryParse(numStr, System.Globalization.NumberStyles.Float, System.Globalization.CultureInfo.InvariantCulture) with + | (true, value) -> lexHelper remaining (TFloat value :: acc) + | (false, _) -> Error $"Invalid float literal: {numStr}" + | _ -> + // Integer with optional type suffix + let numStr = System.String(List.toArray intDigits) + + // Check for type suffix: y, uy, s, us, l, ul, L, Q, UL, Z + match afterInt with + | 'u' :: 'y' :: rest -> + // UInt8 suffix: 1uy + match System.Byte.TryParse(numStr) with + | (true, value) -> lexHelper rest (TUInt8 value :: acc) + | (false, _) -> Error $"Value {numStr} is out of range for UInt8 (0 to 255)" + | 'y' :: rest -> + // Int8 suffix: 1y + match System.SByte.TryParse(numStr) with + | (true, value) -> lexHelper rest (TInt8 value :: acc) + | (false, _) -> + if numStr = "128" then + lexHelper rest (TInt8 System.SByte.MinValue :: acc) + else + Error $"Value {numStr} is out of range for Int8 (-128 to 127)" + | 'u' :: 's' :: rest -> + // UInt16 suffix: 1us + match System.UInt16.TryParse(numStr) with + | (true, value) -> lexHelper rest (TUInt16 value :: acc) + | (false, _) -> Error $"Value {numStr} is out of range for UInt16 (0 to 65535)" + | 's' :: rest -> + // Int16 suffix: 1s + match System.Int16.TryParse(numStr) with + | (true, value) -> lexHelper rest (TInt16 value :: acc) + | (false, _) -> + if numStr = "32768" then + lexHelper rest (TInt16 System.Int16.MinValue :: acc) + else + Error $"Value {numStr} is out of range for Int16 (-32768 to 32767)" + | 'u' :: 'l' :: rest -> + // UInt32 suffix: 1ul + match System.UInt32.TryParse(numStr) with + | (true, value) -> lexHelper rest (TUInt32 value :: acc) + | (false, _) -> Error $"Value {numStr} is out of range for UInt32 (0 to 4294967295)" + | 'l' :: rest -> + // Int32 suffix: 1l + match System.Int32.TryParse(numStr) with + | (true, value) -> lexHelper rest (TInt32 value :: acc) + | (false, _) -> + if numStr = "2147483648" then + lexHelper rest (TInt32 System.Int32.MinValue :: acc) + else + Error $"Value {numStr} is out of range for Int32 (-2147483648 to 2147483647)" + | 'U' :: 'L' :: rest -> + // UInt64 suffix: 1UL + match System.UInt64.TryParse(numStr) with + | (true, value) -> lexHelper rest (TUInt64 value :: acc) + | (false, _) -> Error $"Value {numStr} is out of range for UInt64" + | 'L' :: rest -> + // Int64 explicit suffix: 1L (same as default) + match System.Int64.TryParse(numStr) with + | (true, value) -> lexHelper rest (TInt64 value :: acc) + | (false, _) -> + if numStr = "9223372036854775808" then + lexHelper rest (TInt64 System.Int64.MinValue :: acc) + else + Error $"Integer literal too large: {numStr}" + | 'Q' :: rest -> + // Int128 suffix: 1Q + match System.Int128.TryParse(numStr) with + | (true, value) -> lexHelper rest (TInt128 value :: acc) + | (false, _) -> + // Keep INT128_MIN absolute-value sentinel behavior consistent with Int64 parsing. + if numStr = "170141183460469231731687303715884105728" then + lexHelper rest (TInt128 System.Int128.MinValue :: acc) + else + Error $"Value {numStr} is out of range for Int128" + | 'Z' :: rest -> + // UInt128 suffix: 1Z + match System.UInt128.TryParse(numStr) with + | (true, value) -> lexHelper rest (TUInt128 value :: acc) + | (false, _) -> Error $"Value {numStr} is out of range for UInt128" + | _ -> + // No suffix: default Int64 + match System.Int64.TryParse(numStr) with + | (true, value) -> lexHelper afterInt (TInt64 value :: acc) + | (false, _) -> + // Check for INT64_MIN special case: "9223372036854775808" + // This value is > INT64_MAX but equals |INT64_MIN| + // It's only valid when preceded by minus: -9223372036854775808 + if numStr = "9223372036854775808" then + // Return INT64_MIN directly - this is a special sentinel + // The parser will only accept this when it's negated + lexHelper afterInt (TInt64 System.Int64.MinValue :: acc) + else + Error $"Integer literal too large: {numStr}" + | '$' :: '"' :: rest -> + // Parse interpolated string: $"Hello {name}!" + // Returns TInterpString token with parts list + + // Helper to parse escape sequences (same as regular strings) + let parseEscape (cs: char list) : Result = + match cs with + | 'n' :: remaining -> Ok ('\n', remaining) + | 't' :: remaining -> Ok ('\t', remaining) + | 'r' :: remaining -> Ok ('\r', remaining) + | '\\' :: remaining -> Ok ('\\', remaining) + | '"' :: remaining -> Ok ('"', remaining) + | '\'' :: remaining -> Ok ('\'', remaining) + | '0' :: remaining -> Ok ('\000', remaining) + | '{' :: remaining -> Ok ('{', remaining) // Escape { as \{ + | '}' :: remaining -> Ok ('}', remaining) // Escape } as \} + | 'x' :: h1 :: h2 :: remaining -> + let hexStr = System.String([| h1; h2 |]) + match System.Int32.TryParse(hexStr, System.Globalization.NumberStyles.HexNumber, null) with + | (true, value) -> Ok (char value, remaining) + | (false, _) -> Error $"Invalid hex escape sequence: \\x{hexStr}" + | 'u' :: h1 :: h2 :: h3 :: h4 :: remaining -> + let hexStr = System.String([| h1; h2; h3; h4 |]) + match System.Int32.TryParse(hexStr, System.Globalization.NumberStyles.HexNumber, null) with + | (true, value) -> Ok (char value, remaining) + | (false, _) -> Error $"Invalid unicode escape sequence: \\u{hexStr}" + | c :: _ -> Error $"Unknown escape sequence: \\{c}" + | [] -> Error "Unterminated escape sequence" + + // Helper to collect characters until { or closing " + let rec collectLiteralPart (cs: char list) (chars: char list) : Result = + match cs with + | [] -> Error "Unterminated interpolated string" + | '"' :: remaining -> + let str = System.String(List.rev chars |> List.toArray) + Ok (str, '"' :: remaining) // Put " back for caller to detect end + | '{' :: remaining -> + let str = System.String(List.rev chars |> List.toArray) + Ok (str, '{' :: remaining) // Put { back for caller to detect expression + | '\\' :: escRest -> + match parseEscape escRest with + | Ok (c, remaining) -> collectLiteralPart remaining (c :: chars) + | Error err -> Error err + | c :: remaining -> + collectLiteralPart remaining (c :: chars) + + // Helper to collect expression chars until matching } + let rec collectExprChars (cs: char list) (depth: int) (chars: char list) : Result = + match cs with + | [] -> Error "Unterminated interpolated expression" + | '}' :: remaining when depth = 0 -> + Ok (List.rev chars, remaining) + | '}' :: remaining -> + collectExprChars remaining (depth - 1) ('}' :: chars) + | '{' :: remaining -> + collectExprChars remaining (depth + 1) ('{' :: chars) + | '"' :: remaining -> + // Skip strings inside the expression + let rec skipString (cs: char list) (acc: char list) = + match cs with + | [] -> Error "Unterminated string in interpolated expression" + | '"' :: rest -> Ok ('"' :: acc, rest) + | '\\' :: c :: rest -> skipString rest (c :: '\\' :: acc) + | c :: rest -> skipString rest (c :: acc) + match skipString remaining ('"' :: chars) with + | Ok (acc', rest') -> collectExprChars rest' depth acc' + | Error err -> Error err + | c :: remaining -> + collectExprChars remaining depth (c :: chars) + + // Parse all parts and build InterpPart list + let rec parseInterpParts (cs: char list) (parts: InterpPart list) : Result = + match cs with + | '"' :: remaining -> + // End of interpolated string + Ok (List.rev parts, remaining) + | '{' :: remaining -> + // Expression part - collect chars and lex them + match collectExprChars remaining 0 [] with + | Ok (exprChars, afterExpr) -> + let exprStr = System.String(exprChars |> List.toArray) + // Lex the expression + match lexHelper (exprStr |> Seq.toList) [] with + | Ok tokens -> + let tokens' = tokens |> List.filter (fun t -> t <> TEOF) + parseInterpParts afterExpr (InterpTokens tokens' :: parts) + | Error err -> Error $"Error in interpolated expression: {err}" + | Error err -> Error err + | _ -> + // Literal part + match collectLiteralPart cs [] with + | Ok (str, afterLit) -> + if str = "" then + parseInterpParts afterLit parts + else + parseInterpParts afterLit (InterpText str :: parts) + | Error err -> Error err + + match parseInterpParts rest [] with + | Ok (parts, remaining) -> + lexHelper remaining (TInterpString parts :: acc) + | Error err -> Error err + + | '\'' :: rest -> + // Parse char literal with escape sequences (single Extended Grapheme Cluster) + let rec parseCharContent (cs: char list) (chars: char list) : Result = + match cs with + | [] -> Error "Unterminated char literal" + | '\'' :: remaining -> + // End of char literal + let str = System.String(List.rev chars |> List.toArray) + if str.Length = 0 then + Error "Empty char literal" + else + // Validate that it's a single Extended Grapheme Cluster using .NET's StringInfo + let enumerator = System.Globalization.StringInfo.GetTextElementEnumerator(str) + if enumerator.MoveNext() then + if enumerator.MoveNext() then + Error $"Char literal contains more than one grapheme cluster: '{str}'" + else + Ok (str, remaining) + else + Error "Empty char literal" + | '\\' :: 'n' :: remaining -> + parseCharContent remaining ('\n' :: chars) + | '\\' :: 't' :: remaining -> + parseCharContent remaining ('\t' :: chars) + | '\\' :: 'r' :: remaining -> + parseCharContent remaining ('\r' :: chars) + | '\\' :: '\\' :: remaining -> + parseCharContent remaining ('\\' :: chars) + | '\\' :: '\'' :: remaining -> + parseCharContent remaining ('\'' :: chars) + | '\\' :: '0' :: remaining -> + parseCharContent remaining ('\000' :: chars) + | '\\' :: 'x' :: h1 :: h2 :: remaining -> + // Hex escape: \xNN + let hexStr = System.String([| h1; h2 |]) + match System.Int32.TryParse(hexStr, System.Globalization.NumberStyles.HexNumber, null) with + | (true, value) -> + parseCharContent remaining (char value :: chars) + | (false, _) -> + Error $"Invalid hex escape sequence: \\x{hexStr}" + | '\\' :: c :: _ -> + Error $"Unknown escape sequence: \\{c}" + | c :: remaining -> + parseCharContent remaining (c :: chars) + + let parseCharLiteral () : Result = + match parseCharContent rest [] with + | Ok (str, remaining) -> lexHelper remaining (TCharLit str :: acc) + | Error err -> Error err + + let isApostropheTypeVarContext = + match acc with + | TLParen :: _ // parenthesized type context: ('a * 'b) + | TStar :: _ // tuple-type element separator: 'a * 'b + | TLt :: _ // generic/type arg list start: <'a> + | TComma :: _ // additional generic/type arg: <'a, 'b> + | TColon :: _ // type annotation: x: 'a + | TArrow :: _ // function return type: ('a) -> 'b + | TOf :: _ // sum payload type: Case of 'a + | TEquals :: _ -> // type alias body: type T = 'a + true + | _ -> + false + + let rec parseTypeVarName (cs: char list) (chars: char list) : string * char list = + match cs with + | c :: remaining when System.Char.IsLetterOrDigit(c) || c = '_' -> + parseTypeVarName remaining (c :: chars) + | _ -> + (System.String(List.rev chars |> List.toArray), cs) + + match rest with + | c :: _ when isApostropheTypeVarContext && (System.Char.IsLetter(c) || c = '_') -> + let (typeVarName, afterTypeVar) = parseTypeVarName rest [] + match afterTypeVar with + | '\'' :: _ -> + // Still a char literal if we see a closing quote. + parseCharLiteral () + | _ -> + lexHelper afterTypeVar (TIdent typeVarName :: acc) + | _ -> + parseCharLiteral () + + | '"' :: rest -> + // Parse string literal with escape sequences + let rec parseString (cs: char list) (chars: char list) : Result = + match cs with + | [] -> Error "Unterminated string literal" + | '"' :: remaining -> + // End of string + let str = System.String(List.rev chars |> List.toArray) + Ok (str, remaining) + | '\\' :: 'n' :: remaining -> + parseString remaining ('\n' :: chars) + | '\\' :: 't' :: remaining -> + parseString remaining ('\t' :: chars) + | '\\' :: 'r' :: remaining -> + parseString remaining ('\r' :: chars) + | '\\' :: '\\' :: remaining -> + parseString remaining ('\\' :: chars) + | '\\' :: '"' :: remaining -> + parseString remaining ('"' :: chars) + | '\\' :: '\'' :: remaining -> + parseString remaining ('\'' :: chars) + | '\\' :: '0' :: remaining -> + parseString remaining ('\000' :: chars) + | '\\' :: 'x' :: h1 :: h2 :: remaining -> + // Hex escape: \xNN + let hexStr = System.String([| h1; h2 |]) + match System.Int32.TryParse(hexStr, System.Globalization.NumberStyles.HexNumber, null) with + | (true, value) -> + parseString remaining (char value :: chars) + | (false, _) -> + Error $"Invalid hex escape sequence: \\x{hexStr}" + | '\\' :: 'u' :: h1 :: h2 :: h3 :: h4 :: remaining -> + // Unicode escape: \uNNNN + let hexStr = System.String([| h1; h2; h3; h4 |]) + match System.Int32.TryParse(hexStr, System.Globalization.NumberStyles.HexNumber, null) with + | (true, value) -> + parseString remaining (char value :: chars) + | (false, _) -> + Error $"Invalid unicode escape sequence: \\u{hexStr}" + | '\\' :: c :: _ -> + Error $"Unknown escape sequence: \\{c}" + | c :: remaining -> + parseString remaining (c :: chars) + + match parseString rest [] with + | Ok (str, remaining) -> lexHelper remaining (TStringLit str :: acc) + | Error err -> Error err + | c :: _ -> + Error $"Unexpected character: {c}" + + input |> Seq.toList |> fun cs -> lexHelper cs [] + +/// Parse function type parameters: type, type, ...) returning list and remaining tokens +let rec parseFunctionTypeParams (typeParams: Set) (tokens: Token list) (acc: Type list) : Result = + match tokens with + | TRParen :: rest -> + // End of parameter list + Ok (List.rev acc, rest) + | _ -> + // Parse a type + parseTypeBase typeParams tokens + |> Result.bind (fun (ty, remaining) -> + match remaining with + | TRParen :: rest -> Ok (List.rev (ty :: acc), rest) + | TComma :: rest -> parseFunctionTypeParams typeParams rest (ty :: acc) + | _ -> Error "Expected ',' or ')' in function type parameters") + +/// Base type parser (no function types - used to parse function type components) +and parseTypeBase (typeParams: Set) (tokens: Token list) : Result = + match tokens with + | TIdent "Int8" :: rest -> Ok (AST.TInt8, rest) + | TIdent "Int16" :: rest -> Ok (AST.TInt16, rest) + | TIdent "Int32" :: rest -> Ok (AST.TInt32, rest) + | TIdent "Int64" :: rest -> Ok (AST.TInt64, rest) + | TIdent "Int128" :: rest -> Ok (AST.TInt128, rest) + | TIdent "UInt8" :: rest -> Ok (AST.TUInt8, rest) + | TIdent "UInt16" :: rest -> Ok (AST.TUInt16, rest) + | TIdent "UInt32" :: rest -> Ok (AST.TUInt32, rest) + | TIdent "UInt64" :: rest -> Ok (AST.TUInt64, rest) + | TIdent "UInt128" :: rest -> Ok (AST.TUInt128, rest) + | TIdent "Bool" :: rest -> Ok (AST.TBool, rest) + | TIdent "String" :: rest -> Ok (AST.TString, rest) + | TIdent "Bytes" :: rest -> Ok (AST.TBytes, rest) + | TIdent "Char" :: rest -> Ok (AST.TChar, rest) + | TIdent "Float" :: rest -> Ok (AST.TFloat64, rest) + | TIdent "Unit" :: rest -> Ok (AST.TUnit, rest) + | TIdent "RawPtr" :: rest -> Ok (AST.TRawPtr, rest) // Internal raw pointer type + | TIdent typeName :: rest when Set.contains typeName typeParams -> + Ok (TVar typeName, rest) + | TIdent typeName :: rest when System.Char.IsLower(typeName.[0]) || typeName.StartsWith "_" -> + // Allow type variables in annotations even when not explicitly listed in a type parameter context. + // This keeps parser/pretty roundtrips stable for synthesized lambda type variables. + Ok (TVar typeName, rest) + | TIdent "List" :: TLt :: rest -> + // List type: List + parseTypeWithContext typeParams rest + |> Result.bind (fun (elemType, afterElem) -> + match afterElem with + | TGt :: remaining -> Ok (TList elemType, remaining) + | TShr :: remaining -> Ok (TList elemType, TGt :: remaining) // >> is two >'s + | _ -> Error "Expected '>' after List element type") + | TIdent "Dict" :: TLt :: rest -> + // Dict type: Dict + parseTypeWithContext typeParams rest + |> Result.bind (fun (firstTypeArg, afterFirstArg) -> + match afterFirstArg with + | TComma :: valueRest -> + parseTypeWithContext typeParams valueRest + |> Result.bind (fun (valueType, afterValue) -> + match afterValue with + | TGt :: remaining -> Ok (TDict (firstTypeArg, valueType), remaining) + | TShr :: remaining -> Ok (TDict (firstTypeArg, valueType), TGt :: remaining) // >> is two >'s + | _ -> Error "Expected '>' after Dict value type") + | TGt :: remaining -> + // Upstream syntax also supports Dict with String keys. + Ok (TDict (AST.TString, firstTypeArg), remaining) + | TShr :: remaining -> + Ok (TDict (AST.TString, firstTypeArg), TGt :: remaining) // >> is two >'s + | _ -> Error "Expected ',' or '>' after Dict type argument") + | TIdent typeName :: rest when System.Char.IsUpper(typeName.[0]) -> + // Could be a simple type or a qualified type like Stdlib.Option.Option + // First parse the full qualified name + let rec parseQualTypeName (name: string) (toks: Token list) : string * Token list = + match toks with + | TDot :: TIdent nextName :: remaining when System.Char.IsUpper(nextName.[0]) -> + parseQualTypeName (name + "." + nextName) remaining + | _ -> (name, toks) + let (fullTypeName, afterTypeName) = parseQualTypeName typeName rest + // Check for type arguments <...> + match afterTypeName with + | TLt :: typeArgsStart -> + // Generic type: TypeName + // Need to parse type args allowing lowercase type variables + let rec parseTypeArgsInType (toks: Token list) (acc: Type list) : Result = + parseTypeWithContext typeParams toks + |> Result.bind (fun (ty, remaining) -> + match remaining with + | TGt :: rest -> Ok (List.rev (ty :: acc), rest) + | TShr :: rest -> Ok (List.rev (ty :: acc), TGt :: rest) // >> is two >'s + | TComma :: rest -> parseTypeArgsInType rest (ty :: acc) + | _ -> Error "Expected ',' or '>' after type argument in generic type") + parseTypeArgsInType typeArgsStart [] + |> Result.map (fun (typeArgs, remaining) -> + // Store as TSum with type arguments - type checker will validate + (TSum (fullTypeName, typeArgs), remaining)) + | _ -> + // Simple type without type arguments + Ok (TRecord (fullTypeName, []), afterTypeName) + | TLParen :: rest -> + // Could be a function type: (int, int) -> bool + // Or a tuple type: (int, int) + parseFunctionTypeParams typeParams rest [] + |> Result.bind (fun (paramTypes, afterParams) -> + match afterParams with + | TArrow :: returnRest -> + // Function type: (params) -> return + parseTypeWithContext typeParams returnRest + |> Result.map (fun (returnType, remaining) -> + (TFunction (paramTypes, returnType), remaining)) + | _ -> + // Tuple type: (type, type, ...) + if List.length paramTypes < 2 then + Error "Tuple type must have at least 2 elements" + else + Ok (TTuple paramTypes, afterParams)) + | _ -> Error "Expected type annotation (Int64, Bool, String, Float, TypeName, type variable, or function type)" + +/// Parse a type annotation with context for type parameters in scope +and parseTypeWithContext (typeParams: Set) (tokens: Token list) : Result = + parseTypeBase typeParams tokens + +/// Parse a type annotation (no type parameters in scope) +let parseType (tokens: Token list) : Result = + parseTypeWithContext Set.empty tokens + +/// Parse type parameters: (names only, for function definitions) +let rec parseTypeParams (tokens: Token list) (acc: string list) : Result = + match tokens with + | TIdent name :: TGt :: rest when System.Char.IsLower(name.[0]) -> + // Last type parameter + Ok (List.rev (name :: acc), rest) + | TIdent name :: TComma :: rest when System.Char.IsLower(name.[0]) -> + // More type parameters to come + parseTypeParams rest (name :: acc) + | TIdent name :: _ when not (System.Char.IsLower(name.[0])) -> + Error $"Type parameter must start with lowercase letter: {name}" + | TGt :: rest when List.isEmpty acc -> + // Empty type parameters: <> + Ok ([], rest) + | _ -> Error "Expected type parameter name (lowercase identifier)" + +/// Parse type for type arguments context (allows lowercase as type variables) +/// This is used when parsing call sites like func(args) where t is a type variable +let rec parseTypeArgType (tokens: Token list) : Result = + let withPossibleArrow + (parsedType: Type) + (remaining: Token list) + : Result = + match remaining with + | TArrow :: returnRest -> + parseTypeArgType returnRest + |> Result.map (fun (returnType, remaining') -> + (TFunction ([parsedType], returnType), remaining')) + | _ -> + Ok (parsedType, remaining) + + match tokens with + | TIdent "Int8" :: rest -> withPossibleArrow AST.TInt8 rest + | TIdent "Int16" :: rest -> withPossibleArrow AST.TInt16 rest + | TIdent "Int32" :: rest -> withPossibleArrow AST.TInt32 rest + | TIdent "Int64" :: rest -> withPossibleArrow AST.TInt64 rest + | TIdent "Int128" :: rest -> withPossibleArrow AST.TInt128 rest + | TIdent "UInt8" :: rest -> withPossibleArrow AST.TUInt8 rest + | TIdent "UInt16" :: rest -> withPossibleArrow AST.TUInt16 rest + | TIdent "UInt32" :: rest -> withPossibleArrow AST.TUInt32 rest + | TIdent "UInt64" :: rest -> withPossibleArrow AST.TUInt64 rest + | TIdent "UInt128" :: rest -> withPossibleArrow AST.TUInt128 rest + | TIdent "Bool" :: rest -> withPossibleArrow AST.TBool rest + | TIdent "String" :: rest -> withPossibleArrow AST.TString rest + | TIdent "Bytes" :: rest -> withPossibleArrow AST.TBytes rest + | TIdent "Char" :: rest -> withPossibleArrow AST.TChar rest + | TIdent "Float" :: rest -> withPossibleArrow AST.TFloat64 rest + | TIdent "Unit" :: rest -> withPossibleArrow AST.TUnit rest + | TIdent "RawPtr" :: rest -> withPossibleArrow AST.TRawPtr rest // Internal raw pointer type + | TIdent "List" :: TLt :: rest -> + // List type: List + parseTypeArgType rest + |> Result.bind (fun (elemType, afterElem) -> + match afterElem with + | TGt :: remaining -> withPossibleArrow (TList elemType) remaining + | TShr :: remaining -> withPossibleArrow (TList elemType) (TGt :: remaining) // >> is two >'s + | _ -> Error "Expected '>' after List element type in type argument") + | TIdent "Dict" :: TLt :: rest -> + // Dict type: Dict + parseTypeArgType rest + |> Result.bind (fun (firstTypeArg, afterFirstArg) -> + match afterFirstArg with + | TComma :: valueRest -> + parseTypeArgType valueRest + |> Result.bind (fun (valueType, afterValue) -> + match afterValue with + | TGt :: remaining -> withPossibleArrow (TDict (firstTypeArg, valueType)) remaining + | TShr :: remaining -> withPossibleArrow (TDict (firstTypeArg, valueType)) (TGt :: remaining) // >> is two >'s + | _ -> Error "Expected '>' after Dict value type in type argument") + | TGt :: remaining -> + withPossibleArrow (TDict (AST.TString, firstTypeArg)) remaining + | TShr :: remaining -> + withPossibleArrow (TDict (AST.TString, firstTypeArg)) (TGt :: remaining) // >> is two >'s + | _ -> Error "Expected ',' or '>' after Dict type argument") + | TIdent typeName :: rest when System.Char.IsLower(typeName.[0]) -> + // Lowercase identifier is a type variable in type argument context + withPossibleArrow (TVar typeName) rest + | TIdent typeName :: rest when System.Char.IsUpper(typeName.[0]) -> + // Could be a simple type or a qualified type like Stdlib.Option.Option + // First parse the full qualified name + let rec parseQualTypeName (name: string) (toks: Token list) : string * Token list = + match toks with + | TDot :: TIdent nextName :: remaining when System.Char.IsUpper(nextName.[0]) -> + parseQualTypeName (name + "." + nextName) remaining + | _ -> (name, toks) + let (fullTypeName, afterTypeName) = parseQualTypeName typeName rest + // Check for type arguments <...> + match afterTypeName with + | TLt :: typeArgsStart -> + // Generic type: TypeName - recursively parse type arguments + let rec parseNestedTypeArgs (toks: Token list) (acc: Type list) : Result = + parseTypeArgType toks + |> Result.bind (fun (ty, remaining) -> + match remaining with + | TGt :: rest -> Ok (List.rev (ty :: acc), rest) + | TShr :: rest -> Ok (List.rev (ty :: acc), TGt :: rest) // >> is two >'s + | TComma :: rest -> parseNestedTypeArgs rest (ty :: acc) + | _ -> Error "Expected ',' or '>' after type argument in generic type") + parseNestedTypeArgs typeArgsStart [] + |> Result.bind (fun (typeArgs, remaining) -> + withPossibleArrow (TSum (fullTypeName, typeArgs)) remaining) + | _ -> + // Simple type without type arguments + withPossibleArrow (TRecord (fullTypeName, [])) afterTypeName + | TLParen :: rest -> + // Tuple type or function type: (Type1, Type2, ...) or (Type1, Type2) -> RetType + parseTypeArgTupleElements rest [] + |> Result.bind (fun (elemTypes, afterElems) -> + match afterElems with + | TArrow :: returnRest -> + // Function type: (params) -> return + parseTypeArgType returnRest + |> Result.map (fun (returnType, remaining) -> + (TFunction (elemTypes, returnType), remaining)) + | _ -> + // Tuple type: (type, type, ...) + if List.length elemTypes < 2 then + Error "Tuple type must have at least 2 elements" + else + Ok (TTuple elemTypes, afterElems)) + | _ -> Error "Expected type in type argument" + +/// Parse tuple elements in type argument context: Type1, Type2, ... ) +and parseTypeArgTupleElements (tokens: Token list) (acc: Type list) : Result = + match tokens with + | TRParen :: rest -> + // End of tuple/parameter list + Ok (List.rev acc, rest) + | _ -> + // Parse a type + parseTypeArgType tokens + |> Result.bind (fun (ty, remaining) -> + match remaining with + | TRParen :: rest -> Ok (List.rev (ty :: acc), rest) + | TComma :: rest -> parseTypeArgTupleElements rest (ty :: acc) + | _ -> Error "Expected ',' or ')' in tuple type") + +/// Parse type arguments: (concrete types or type vars, for call sites) +let rec parseTypeArgs (tokens: Token list) (acc: Type list) : Result = + parseTypeArgType tokens + |> Result.bind (fun (ty, remaining) -> + match remaining with + | TGt :: rest -> + // Last type argument + Ok (List.rev (ty :: acc), rest) + | TShr :: rest -> + // >> is two >'s - last type argument, put one > back + Ok (List.rev (ty :: acc), TGt :: rest) + | TComma :: rest -> + // More type arguments to come + parseTypeArgs rest (ty :: acc) + | _ -> Error "Expected ',' or '>' after type argument") + +/// Parse a single parameter: IDENT : type (with type parameter context) +let parseParamWithContext (typeParams: Set) (tokens: Token list) : Result<(string * Type) * Token list, string> = + match tokens with + | TIdent name :: TColon :: rest -> + parseTypeWithContext typeParams rest + |> Result.map (fun (ty, remaining) -> ((name, ty), remaining)) + | _ -> Error "Expected parameter (name : type)" + +/// Parse parameter list: param (, param)* (with type parameter context) +let rec parseParamsWithContext (typeParams: Set) (tokens: Token list) (acc: (string * Type) list) : Result<(string * Type) list * Token list, string> = + match tokens with + | TRParen :: _ -> + // End of parameters + Ok (List.rev acc, tokens) + | _ -> + // Parse a parameter + parseParamWithContext typeParams tokens + |> Result.bind (fun (param, remaining) -> + match remaining with + | TComma :: rest -> + // More parameters + parseParamsWithContext typeParams rest (param :: acc) + | TRParen :: _ -> + // End of parameters + Ok (List.rev (param :: acc), remaining) + | _ -> Error "Expected ',' or ')' after parameter") + +/// Parse parameter list: param (, param)* (no type parameters in scope) +let rec parseParams (tokens: Token list) (acc: (string * Type) list) : Result<(string * Type) list * Token list, string> = + parseParamsWithContext Set.empty tokens acc + +/// Parse record fields in a type definition: { name: Type, name: Type, ... } +/// Uses type parameter context so generic record fields can reference type vars. +let rec parseRecordFieldsWithContext + (typeParams: Set) + (tokens: Token list) + (acc: (string * Type) list) + : Result<(string * Type) list * Token list, string> = + match tokens with + | TRBrace :: rest -> + // End of fields + Ok (List.rev acc, rest) + | TIdent name :: TColon :: rest -> + parseTypeWithContext typeParams rest + |> Result.bind (fun (ty, remaining) -> + match remaining with + | TComma :: rest' -> + // More fields + parseRecordFieldsWithContext typeParams rest' ((name, ty) :: acc) + | TRBrace :: rest' -> + // End of fields + Ok (List.rev ((name, ty) :: acc), rest') + | _ -> Error "Expected ',' or '}' after record field") + | _ -> Error "Expected field name in record definition" + +/// Parse record fields in a type definition with no type parameter context. +let parseRecordFields (tokens: Token list) (acc: (string * Type) list) : Result<(string * Type) list * Token list, string> = + parseRecordFieldsWithContext Set.empty tokens acc + +/// Parse sum type variants: Variant1 | Variant2 of Type | ... +/// Returns list of variants and remaining tokens +let private parseVariantPayloadType (tokens: Token list) : Result = + let rec stripLabels (expectLabel: bool) (remainingTokens: Token list) (acc: Token list) : Token list = + match remainingTokens with + | TIdent _ :: TColon :: rest when expectLabel -> + stripLabels false rest acc + | TStar :: rest -> + stripLabels true rest (TStar :: acc) + | token :: rest -> + stripLabels false rest (token :: acc) + | [] -> + List.rev acc + + let normalizedTokens = stripLabels true tokens [] + parseType normalizedTokens + +let private parseVariantPayloadTypeWithContext + (typeParamSet: Set) + (tokens: Token list) + : Result = + let rec stripLabels (expectLabel: bool) (remainingTokens: Token list) (acc: Token list) : Token list = + match remainingTokens with + | TIdent _ :: TColon :: rest when expectLabel -> + stripLabels false rest acc + | TStar :: rest -> + stripLabels true rest (TStar :: acc) + | token :: rest -> + stripLabels false rest (token :: acc) + | [] -> + List.rev acc + + let normalizedTokens = stripLabels true tokens [] + parseTypeWithContext typeParamSet normalizedTokens + +let rec parseVariants (tokens: Token list) (acc: Variant list) : Result = + match tokens with + | TIdent variantName :: TOf :: rest when System.Char.IsUpper(variantName.[0]) -> + // Variant with payload: Variant of Type + parseVariantPayloadType rest + |> Result.bind (fun (payloadType, afterType) -> + let variant = { Name = variantName; Payload = Some payloadType } + match afterType with + | TBar :: rest' -> + // More variants + parseVariants rest' (variant :: acc) + | _ -> + // End of variants + Ok (List.rev (variant :: acc), afterType)) + | TIdent variantName :: rest when System.Char.IsUpper(variantName.[0]) -> + // Simple enum variant (no payload) + let variant = { Name = variantName; Payload = None } + match rest with + | TBar :: rest' -> + // More variants + parseVariants rest' (variant :: acc) + | _ -> + // End of variants (next token is not a bar) + Ok (List.rev (variant :: acc), rest) + | _ -> Error "Expected variant name (must start with uppercase letter)" + +/// Parse sum type variants with type parameter context: Variant1 | Variant2 of t | ... +/// Uses parseTypeWithContext to resolve type parameters +let rec parseVariantsWithContext (typeParams: string list) (tokens: Token list) (acc: Variant list) : Result = + let typeParamSet = Set.ofList typeParams + match tokens with + | TIdent variantName :: TOf :: rest when System.Char.IsUpper(variantName.[0]) -> + // Variant with payload: Variant of Type + parseVariantPayloadTypeWithContext typeParamSet rest + |> Result.bind (fun (payloadType, afterType) -> + let variant = { Name = variantName; Payload = Some payloadType } + match afterType with + | TBar :: rest' -> + // More variants + parseVariantsWithContext typeParams rest' (variant :: acc) + | _ -> + // End of variants + Ok (List.rev (variant :: acc), afterType)) + | TIdent variantName :: rest when System.Char.IsUpper(variantName.[0]) -> + // Simple enum variant (no payload) + let variant = { Name = variantName; Payload = None } + match rest with + | TBar :: rest' -> + // More variants + parseVariantsWithContext typeParams rest' (variant :: acc) + | _ -> + // End of variants (next token is not a bar) + Ok (List.rev (variant :: acc), rest) + | _ -> Error "Expected variant name (must start with uppercase letter)" + +/// Parse a qualified type name: Name or Stdlib.Result.Result +let rec parseQualifiedTypeName (firstName: string) (tokens: Token list) : string * Token list = + match tokens with + | TDot :: TIdent nextName :: rest when System.Char.IsUpper(nextName.[0]) -> + let (fullName, remaining) = parseQualifiedTypeName nextName rest + (firstName + "." + fullName, remaining) + | _ -> + (firstName, tokens) + +/// Parse a type definition: type Name = { fields } or type Name = Variant1 | Variant2 of Type | ... +/// Also supports type aliases: type Id = String, type MyList = List +/// Supports qualified type names: type Stdlib.Result.Result = Ok of T | Error of E +/// Supports generic types: type Result = Ok of t | Error of e +let parseTypeDef (tokens: Token list) : Result = + match tokens with + | TType :: TIdent firstName :: rest when System.Char.IsUpper(firstName.[0]) -> + // Parse potentially qualified type name + let (typeName, afterName) = parseQualifiedTypeName firstName rest + // Check for type parameters: + let parseBody typeParams afterTypeParams = + match afterTypeParams with + | TEquals :: TLBrace :: bodyRest -> + // Record type: type Name = { field: Type, ... } + let typeParamSet = Set.ofList typeParams + parseRecordFieldsWithContext typeParamSet bodyRest [] + |> Result.map (fun (fields, remaining) -> + (RecordDef (typeName, typeParams, fields), remaining)) + | TEquals :: TIdent variantName :: TOf :: bodyRest when System.Char.IsUpper(variantName.[0]) -> + // Sum type with first variant having payload: type Name = Variant of Type | ... + let typeParamSet = Set.ofList typeParams + parseVariantPayloadTypeWithContext typeParamSet bodyRest + |> Result.bind (fun (payloadType, afterType) -> + let firstVariant = { Name = variantName; Payload = Some payloadType } + match afterType with + | TBar :: rest' -> + // More variants + parseVariantsWithContext typeParams rest' [firstVariant] + |> Result.map (fun (variants, remaining) -> + (SumTypeDef (typeName, typeParams, variants), remaining)) + | _ -> + // Single variant sum type + Ok (SumTypeDef (typeName, typeParams, [firstVariant]), afterType)) + | TEquals :: TIdent variantName :: TBar :: bodyRest when System.Char.IsUpper(variantName.[0]) -> + // Sum type with multiple variants: type Name = Variant1 | Variant2 | ... + let firstVariant = { Name = variantName; Payload = None } + parseVariantsWithContext typeParams bodyRest [firstVariant] + |> Result.map (fun (variants, remaining) -> + (SumTypeDef (typeName, typeParams, variants), remaining)) + | TEquals :: rest' -> + // Could be a type alias or a single-variant sum type + // Try to parse as a type first + let typeParamSet = Set.ofList typeParams + match parseTypeWithContext typeParamSet rest' with + | Ok (targetType, remaining) -> + // Decide: type alias or single-variant sum type? + // Rules: + // 1. Primitive types (Int64, String, etc.) → TYPE ALIAS + // 2. Generic types (List, Result) → TYPE ALIAS + // 3. Tuple types ((T, U)) → TYPE ALIAS + // 4. Function types ((T) -> U) → TYPE ALIAS + // 5. Simple name (TRecord): + // - Same name as type being defined → SUM TYPE (recursive variant) + // - End of input → SUM TYPE (backwards compat for single-variant enums) + // - Otherwise → TYPE ALIAS (reference to existing type) + match targetType with + | TRecord (potentialVariant, _) when potentialVariant = typeName -> + // Same name as type being defined - this is a recursive variant definition + // e.g., type Unit2 = Unit2 defines a sum type with variant Unit2 + let variant = { Name = potentialVariant; Payload = None } + Ok (SumTypeDef (typeName, typeParams, [variant]), remaining) + | TRecord (potentialVariant, _) when + // Not a primitive type and at end of input - treat as sum type for backwards compat + potentialVariant <> "Int64" && potentialVariant <> "Int32" && potentialVariant <> "Int16" && potentialVariant <> "Int8" && + potentialVariant <> "UInt64" && potentialVariant <> "UInt32" && potentialVariant <> "UInt16" && potentialVariant <> "UInt8" && + potentialVariant <> "Bool" && potentialVariant <> "String" && potentialVariant <> "Float" && + (match remaining with [] -> true | _ -> false) -> + let variant = { Name = potentialVariant; Payload = None } + Ok (SumTypeDef (typeName, typeParams, [variant]), remaining) + | _ -> + // Type alias for: + // - Primitive types (parsed as TInt64, TString, etc. directly by parseType) + // - Generic types (TSum with type args, TList) + // - Tuple types (TTuple) + // - Function types (TFunction) + // - User types with remaining tokens (assumed to be alias to existing type) + Ok (TypeAlias (typeName, typeParams, targetType), remaining) + | Error _ -> + Error "Expected type expression after '=' in type alias or variant name" + | _ -> Error "Expected '=' after type name in type definition" + match afterName with + | TLt :: rest' -> + // Generic type: type Name = ... + parseTypeParams rest' [] + |> Result.bind (fun (typeParams, afterParams) -> + parseBody typeParams afterParams) + | _ -> + // Non-generic type + parseBody [] afterName + | TType :: TIdent name :: _ when not (System.Char.IsUpper(name.[0])) -> + Error $"Type name must start with uppercase letter: {name}" + | _ -> Error "Expected type definition: type Name = { fields } or type Name = Variant1 | Variant2" + +/// Parse a qualified function name: name or Stdlib.Int64.add +let rec parseQualifiedFuncName (firstName: string) (tokens: Token list) : string * Token list = + match tokens with + | TDot :: TIdent nextName :: rest -> + let (fullName, remaining) = parseQualifiedFuncName nextName rest + (firstName + "." + fullName, remaining) + | _ -> + (firstName, tokens) + +let private generatedUnitParam (index: int) : string * Type = + ($"$unit{index}", TUnit) + +let private ensureParamGroupNonEmpty (paramIndex: int) (parameters: (string * Type) list) : (string * Type) list = + if List.isEmpty parameters then [generatedUnitParam paramIndex] else parameters + +/// Parse a function definition: def name(params) : type = body +/// Type parameters are optional: def name(params) : type = body is also valid +/// Qualified names supported: def Stdlib.Int64.add(params) : type = body +let parseFunctionDef (tokens: Token list) (parseExpr: Token list -> Result) : Result = + match tokens with + | TDef :: TIdent firstName :: rest -> + // Parse potentially qualified function name (e.g., Stdlib.Int64.add) + let (name, afterName) = parseQualifiedFuncName firstName rest + match afterName with + | TLt :: rest' -> + // Generic function: def name(...) + parseTypeParams rest' [] + |> Result.bind (fun (typeParams, afterTypeParams) -> + // Check for duplicate type parameters + if List.length typeParams <> (typeParams |> List.distinct |> List.length) then + Error "Duplicate type parameter names" + else + let typeParamsSet = Set.ofList typeParams + match afterTypeParams with + | TLParen :: paramsStart -> + // Parse parameters with type params in scope + let paramsResult = + match paramsStart with + | TRParen :: _ -> Ok ([], paramsStart) + | _ -> parseParamsWithContext typeParamsSet paramsStart [] + + paramsResult + |> Result.bind (fun (parameters, remaining) -> + let normalizedParameters = ensureParamGroupNonEmpty 0 parameters + match remaining with + | TRParen :: TColon :: rest'' -> + // Parse return type with type params in scope + parseTypeWithContext typeParamsSet rest'' + |> Result.bind (fun (returnType, remaining') -> + match remaining' with + | TEquals :: rest''' -> + // Parse body + parseExpr rest''' + |> Result.map (fun (body, remaining'') -> + let funcDef = { + Name = name + TypeParams = typeParams + Params = NonEmptyList.fromList normalizedParameters + ReturnType = returnType + Body = body + } + (funcDef, remaining'')) + | _ -> Error "Expected '=' after function return type") + | _ -> Error "Expected ':' after function parameters") + | _ -> Error "Expected '(' after type parameters") + | TLParen :: rest' -> + // Non-generic function: def name(...) + let paramsResult = + match rest' with + | TRParen :: _ -> Ok ([], rest') + | _ -> parseParams rest' [] + + paramsResult + |> Result.bind (fun (parameters, remaining) -> + let normalizedParameters = ensureParamGroupNonEmpty 0 parameters + match remaining with + | TRParen :: TColon :: rest'' -> + // Parse return type + parseType rest'' + |> Result.bind (fun (returnType, remaining') -> + match remaining' with + | TEquals :: rest''' -> + // Parse body + parseExpr rest''' + |> Result.map (fun (body, remaining'') -> + let funcDef = { + Name = name + TypeParams = [] + Params = NonEmptyList.fromList normalizedParameters + ReturnType = returnType + Body = body + } + (funcDef, remaining'')) + | _ -> Error "Expected '=' after function return type") + | _ -> Error "Expected ':' after function parameters") + | _ -> Error $"Expected '<' or '(' after function name '{name}'" + | _ -> Error "Expected function definition (def name(params) : type = body)" + +/// Parse a pattern for pattern matching +let rec parsePattern (tokens: Token list) : Result = + match tokens with + | TUnderscore :: rest -> + // Wildcard pattern: _ + Ok (PWildcard, rest) + | TInt64 n :: rest -> + // Integer literal pattern (Int64) + Ok (PInt64 n, rest) + | TInt128 n :: rest -> + Ok (PInt128Literal n, rest) + | TInt8 n :: rest -> + Ok (PInt8Literal n, rest) + | TInt16 n :: rest -> + Ok (PInt16Literal n, rest) + | TInt32 n :: rest -> + Ok (PInt32Literal n, rest) + | TUInt8 n :: rest -> + Ok (PUInt8Literal n, rest) + | TUInt16 n :: rest -> + Ok (PUInt16Literal n, rest) + | TUInt32 n :: rest -> + Ok (PUInt32Literal n, rest) + | TUInt64 n :: rest -> + Ok (PUInt64Literal n, rest) + | TUInt128 n :: rest -> + Ok (PUInt128Literal n, rest) + | TMinus :: TInt64 n :: rest -> + // Negative integer literal pattern + Ok (PInt64 (-n), rest) + | TMinus :: TInt128 n :: rest when n = System.Int128.MinValue -> + Ok (PInt128Literal System.Int128.MinValue, rest) + | TMinus :: TInt128 n :: rest -> + Ok (PInt128Literal (-n), rest) + | TMinus :: TInt8 n :: rest -> + Ok (PInt8Literal (sbyte (-int n)), rest) + | TMinus :: TInt16 n :: rest -> + Ok (PInt16Literal (int16 (-int n)), rest) + | TMinus :: TInt32 n :: rest -> + Ok (PInt32Literal (-n), rest) + | TMinus :: TFloat f :: rest -> + Ok (PFloat (-f), rest) + | TTrue :: rest -> + // Boolean true pattern + Ok (PBool true, rest) + | TFalse :: rest -> + // Boolean false pattern + Ok (PBool false, rest) + | TStringLit s :: rest -> + // String literal pattern + Ok (PString s, rest) + | TCharLit s :: rest -> + Ok (PChar s, rest) + | TFloat f :: rest -> + // Float literal pattern + Ok (PFloat f, rest) + | TLParen :: TRParen :: rest -> + // Unit pattern: () + Ok (PUnit, rest) + | TLParen :: rest -> + // Tuple pattern: (a, b, c) + parseTuplePattern rest [] + | TLBrace :: _ -> + // Anonymous record pattern is no longer supported + Error "Record pattern requires type name: use 'TypeName { field = pattern, ... }'" + | TLBracket :: rest -> + // List pattern: [a, b, c] or [] + parseListPattern rest [] + | TIdent name :: TLParen :: rest when System.Char.IsUpper(name.[0]) -> + // Constructor with payload pattern: Some(x) + parsePattern rest + |> Result.bind (fun (payloadPattern, remaining) -> + match remaining with + | TRParen :: rest' -> + Ok (PConstructor (name, Some payloadPattern), rest') + | _ -> Error "Expected ')' after constructor pattern payload") + | TIdent typeName :: TLBrace :: rest when System.Char.IsUpper(typeName.[0]) -> + // Record pattern with type name: Point { x = a, y = b } + parseRecordPatternWithTypeName typeName rest [] + | TIdent name :: rest when System.Char.IsUpper(name.[0]) -> + // Constructor pattern without payload: Red, None + Ok (PConstructor (name, None), rest) + | TIdent name :: rest -> + // Variable pattern: x (binds the value) + Ok (PVar name, rest) + | _ -> Error "Expected pattern (_, variable, literal, or constructor)" + +and parseTuplePattern (tokens: Token list) (acc: Pattern list) : Result = + parsePattern tokens + |> Result.bind (fun (pat, remaining) -> + match remaining with + | TRParen :: rest -> + // End of tuple pattern + let patterns = List.rev (pat :: acc) + Ok (PTuple patterns, rest) + | TComma :: rest -> + // More elements + parseTuplePattern rest (pat :: acc) + | _ -> Error "Expected ',' or ')' in tuple pattern") + +and parseRecordPatternWithTypeName (typeName: string) (tokens: Token list) (acc: (string * Pattern) list) : Result = + // Parse record pattern with explicit type name: TypeName { field = pattern, ... } + match tokens with + | TRBrace :: rest -> + // Empty record or end of fields + let fields = List.rev acc + Ok (PRecord (typeName, fields), rest) + | TIdent fieldName :: TEquals :: rest -> + parsePattern rest + |> Result.bind (fun (pat, remaining) -> + let field = (fieldName, pat) + match remaining with + | TRBrace :: rest' -> + // End of record pattern + let fields = List.rev (field :: acc) + Ok (PRecord (typeName, fields), rest') + | TComma :: rest' -> + // More fields + parseRecordPatternWithTypeName typeName rest' (field :: acc) + | _ -> Error "Expected ',' or '}' in record pattern") + | _ -> Error "Expected field name in record pattern" + +and parseListPattern (tokens: Token list) (acc: Pattern list) : Result = + match tokens with + | TRBracket :: rest -> + // Empty list or end of list pattern + Ok (PList (List.rev acc), rest) + | TDotDotDot :: rest -> + // Rest pattern at start: [...t] + parsePattern rest + |> Result.bind (fun (tailPat, remaining) -> + match remaining with + | TRBracket :: rest' -> + Ok (PListCons (List.rev acc, tailPat), rest') + | _ -> Error "Expected ']' after rest pattern") + | _ -> + parsePattern tokens + |> Result.bind (fun (pat, remaining) -> + match remaining with + | TRBracket :: rest -> + // End of list pattern + Ok (PList (List.rev (pat :: acc)), rest) + | TComma :: TDotDotDot :: rest -> + // Rest pattern after element: [a, b, ...t] + parsePattern rest + |> Result.bind (fun (tailPat, remaining') -> + match remaining' with + | TRBracket :: rest' -> + Ok (PListCons (List.rev (pat :: acc), tailPat), rest') + | _ -> Error "Expected ']' after rest pattern") + | TComma :: rest -> + // More elements + parseListPattern rest (pat :: acc) + | _ -> Error "Expected ',' or ']' in list pattern") + +/// Parse a single case: | pat1 | pat2 when guard -> expr +/// Supports multiple patterns (pattern grouping) and optional guard clause +let parseCase (tokens: Token list) (parseExprFn: Token list -> Result) : Result = + // Parse patterns until we see TWhen or TArrow + let rec parsePatterns (toks: Token list) (acc: Pattern list) : Result = + match toks with + | TBar :: rest -> + parsePattern rest + |> Result.bind (fun (pattern, remaining) -> + // Check what comes next + match remaining with + | TBar :: _ -> + // Another pattern in the group + parsePatterns remaining (pattern :: acc) + | TWhen :: _ | TArrow :: _ -> + // End of patterns, followed by guard or body + Ok (List.rev (pattern :: acc), remaining) + | _ -> Error "Expected '|', 'when', or '->' after pattern") + | _ -> Error "Expected '|' before pattern" + + parsePatterns tokens [] + |> Result.bind (fun (patterns, remaining) -> + // Convert patterns list to NonEmptyList (safe since parsePatterns ensures at least one pattern) + let patternsNel = NonEmptyList.fromList patterns + // Parse optional guard + match remaining with + | TWhen :: rest' -> + // Parse guard expression + parseExprFn rest' + |> Result.bind (fun (guard, remaining') -> + match remaining' with + | TArrow :: rest'' -> + // Parse body + parseExprFn rest'' + |> Result.map (fun (body, remaining''') -> + ({ Patterns = patternsNel; Guard = Some guard; Body = body }, remaining''')) + | _ -> Error "Expected '->' after guard expression") + | TArrow :: rest' -> + // No guard, parse body directly + parseExprFn rest' + |> Result.map (fun (body, remaining') -> + ({ Patterns = patternsNel; Guard = None; Body = body }, remaining')) + | _ -> Error "Expected 'when' or '->' after pattern") + +/// Try to parse lambda parameters: (ident : type, ident : type, ...) +/// Returns Some (params, remaining) if successful, None otherwise +let tryParseLambdaParams (tokens: Token list) : (NonEmptyList * Token list) option = + let rec parseParams (toks: Token list) (acc: (string * Type) list) : (NonEmptyList * Token list) option = + match toks with + | TRParen :: rest -> + // End of parameters + match List.rev acc with + | [] -> Some (NonEmptyList.singleton (generatedUnitParam 0), rest) + | parameters -> Some (NonEmptyList.fromList parameters, rest) + | TIdent name :: TColon :: rest when not (System.Char.IsUpper(name.[0])) -> + // Parameter: name : type + match parseType rest with + | Ok (ty, remaining) -> + match remaining with + | TComma :: rest' -> + // More parameters + parseParams rest' ((name, ty) :: acc) + | TRParen :: rest' -> + // End of parameters + Some (NonEmptyList.fromList (List.rev ((name, ty) :: acc)), rest') + | _ -> None // Not a valid lambda + | Error _ -> None // Type parse failed + | _ -> None // Not a valid lambda parameter + + parseParams tokens [] + +/// Parser: convert tokens to AST +let parse (tokens: Token list) : Result = + // Recursive descent parser with operator precedence + // Precedence (low to high): or < and < comparison < +/- < */ < unary + + // Compiler syntax normally requires parenthesized call arguments (`f(x)`), but + // upstream tests also exercise generic calls with a single space-applied argument + // (`f<'a> "x"`). Keep this narrowly targeted to generic-call parsing. + let canStartSpaceApplicationArg (toks: Token list) : bool = + match toks with + | TInt64 _ :: _ + | TInt128 _ :: _ + | TInt8 _ :: _ + | TInt16 _ :: _ + | TInt32 _ :: _ + | TUInt8 _ :: _ + | TUInt16 _ :: _ + | TUInt32 _ :: _ + | TUInt64 _ :: _ + | TUInt128 _ :: _ + | TFloat _ :: _ + | TStringLit _ :: _ + | TCharLit _ :: _ + | TTrue :: _ + | TFalse :: _ + | TIdent _ :: _ + | TLParen :: _ + | TLBracket :: _ -> true + | _ -> false + + /// Parse multiple cases for pattern matching: | p1 -> e1 | p2 -> e2 ... + let rec parseCases (toks: Token list) (acc: MatchCase list) : Result = + match toks with + | TBar :: _ -> + // Another case + parseCase toks parseExpr + |> Result.bind (fun (case, remaining) -> + parseCases remaining (case :: acc)) + | _ -> + // End of cases + if List.isEmpty acc then + Error "Match expression must have at least one case" + else + Ok (List.rev acc, toks) + + and parseExpr (toks: Token list) : Result = + match toks with + | TLet :: rest -> + // Parse: let pattern = value in body + // Supports simple let (let x = ...) and pattern matching (let (a, b) = ...) + parsePattern rest + |> Result.bind (fun (pattern, remaining) -> + match remaining with + | TEquals :: rest' -> + parseExpr rest' + |> Result.bind (fun (value, remaining') -> + match remaining' with + | TIn :: rest'' -> + parseExpr rest'' + |> Result.map (fun (body, remaining'') -> + // If pattern is just PVar, use Let; otherwise desugar to Match + match pattern with + | PVar name -> (Let (name, value, body), remaining'') + | _ -> (Match (value, [{ Patterns = NonEmptyList.singleton pattern; Guard = None; Body = body }]), remaining'')) + | _ -> Error "Expected 'in' after let binding value") + | _ -> Error "Expected '=' after let binding pattern") + | TIf :: rest -> + // Parse: if cond then thenBranch [else elseBranch] + // When else is omitted, synthesize unit: if cond then expr ==> if cond then expr else () + parseExpr rest + |> Result.bind (fun (cond, remaining) -> + match remaining with + | TThen :: rest' -> + parseExpr rest' + |> Result.bind (fun (thenBranch, remaining') -> + match remaining' with + | TElse :: rest'' -> + parseExpr rest'' + |> Result.map (fun (elseBranch, remaining'') -> + (If (cond, thenBranch, elseBranch), remaining'')) + | _ -> + Ok (If (cond, thenBranch, UnitLiteral), remaining')) + | _ -> Error "Expected 'then' after if condition") + | TMatch :: rest -> + // Parse: match scrutinee with | p1 -> e1 | p2 -> e2 + parseExpr rest + |> Result.bind (fun (scrutinee, remaining) -> + match remaining with + | TWith :: rest' -> + parseCases rest' [] + |> Result.map (fun (cases, remaining') -> + (Match (scrutinee, cases), remaining')) + | _ -> Error "Expected 'with' after match scrutinee") + | _ -> + parsePipe toks + + and parsePipe (toks: Token list) : Result = + // Pipe operator |> has lowest precedence, left-associative + // x |> f desugars to f(x) - Call if f is a name, Apply if f is an expression + parseOr toks + |> Result.bind (fun (left, remaining) -> + let rec parsePipeRest (leftExpr: Expr) (toks: Token list) : Result = + match toks with + | TPipe :: rest -> + parseOr rest + |> Result.bind (fun (right, remaining') -> + // Desugar: left |> right + // Pipe passes left as the FIRST argument to right + // This matches Dark/Darklang convention where data comes first + let pipedExpr = + match right with + | Var funcName -> + // Simple function reference: f becomes f(left) + Call (funcName, NonEmptyList.singleton leftExpr) + | Call (funcName, args) -> + // Partial application: f(a) becomes f(left, a) + match NonEmptyList.toList args with + | [UnitLiteral] -> + // Zero-arg call placeholder: f() |> g() => g(f()) + Call (funcName, NonEmptyList.singleton leftExpr) + | _ -> + Call (funcName, NonEmptyList.cons leftExpr args) + | TypeApp (funcName, typeArgs, args) -> + // Generic partial application: f(a) becomes f(left, a) + match NonEmptyList.toList args with + | [UnitLiteral] -> + // Zero-arg call placeholder: f() |> g() => g(f()) + TypeApp (funcName, typeArgs, NonEmptyList.singleton leftExpr) + | _ -> + TypeApp (funcName, typeArgs, NonEmptyList.cons leftExpr args) + | _ -> + // Lambda or other expression: apply left to it + Apply (right, NonEmptyList.singleton leftExpr) + parsePipeRest pipedExpr remaining') + | _ -> Ok (leftExpr, toks) + parsePipeRest left remaining) + + and parseOr (toks: Token list) : Result = + parseAnd toks + |> Result.bind (fun (left, remaining) -> + let rec parseOrRest (leftExpr: Expr) (toks: Token list) : Result = + match toks with + | TOr :: rest -> + parseAnd rest + |> Result.bind (fun (right, remaining') -> + parseOrRest (BinOp (Or, leftExpr, right)) remaining') + | _ -> Ok (leftExpr, toks) + parseOrRest left remaining) + + and parseAnd (toks: Token list) : Result = + parseBitOr toks + |> Result.bind (fun (left, remaining) -> + let rec parseAndRest (leftExpr: Expr) (toks: Token list) : Result = + match toks with + | TAnd :: rest -> + parseBitOr rest + |> Result.bind (fun (right, remaining') -> + parseAndRest (BinOp (And, leftExpr, right)) remaining') + | _ -> Ok (leftExpr, toks) + parseAndRest left remaining) + + and parseBitOr (toks: Token list) : Result = + parseBitXor toks + |> Result.bind (fun (left, remaining) -> + let rec parseBitOrRest (leftExpr: Expr) (toks: Token list) : Result = + match toks with + | TBitOr :: rest -> + parseBitXor rest + |> Result.bind (fun (right, remaining') -> + parseBitOrRest (BinOp (BitOr, leftExpr, right)) remaining') + | _ -> Ok (leftExpr, toks) + parseBitOrRest left remaining) + + and parseBitXor (toks: Token list) : Result = + parseBitAnd toks + |> Result.bind (fun (left, remaining) -> + let rec parseBitXorRest (leftExpr: Expr) (toks: Token list) : Result = + match toks with + | TBitXor :: rest -> + parseBitAnd rest + |> Result.bind (fun (right, remaining') -> + parseBitXorRest (BinOp (BitXor, leftExpr, right)) remaining') + | _ -> Ok (leftExpr, toks) + parseBitXorRest left remaining) + + and parseBitAnd (toks: Token list) : Result = + parseComparison toks + |> Result.bind (fun (left, remaining) -> + let rec parseBitAndRest (leftExpr: Expr) (toks: Token list) : Result = + match toks with + | TBitAnd :: rest -> + parseComparison rest + |> Result.bind (fun (right, remaining') -> + parseBitAndRest (BinOp (BitAnd, leftExpr, right)) remaining') + | _ -> Ok (leftExpr, toks) + parseBitAndRest left remaining) + + and parseComparison (toks: Token list) : Result = + parseShift toks + |> Result.bind (fun (left, remaining) -> + // Comparison operators are non-associative (no chaining) + match remaining with + | TEqEq :: rest -> + parseShift rest + |> Result.map (fun (right, remaining') -> + (BinOp (Eq, left, right), remaining')) + | TNeq :: rest -> + parseShift rest + |> Result.map (fun (right, remaining') -> + (BinOp (Neq, left, right), remaining')) + | TLt :: rest -> + parseShift rest + |> Result.map (fun (right, remaining') -> + (BinOp (Lt, left, right), remaining')) + | TGt :: rest -> + parseShift rest + |> Result.map (fun (right, remaining') -> + (BinOp (Gt, left, right), remaining')) + | TLte :: rest -> + parseShift rest + |> Result.map (fun (right, remaining') -> + (BinOp (Lte, left, right), remaining')) + | TGte :: rest -> + parseShift rest + |> Result.map (fun (right, remaining') -> + (BinOp (Gte, left, right), remaining')) + | _ -> Ok (left, remaining)) + + and parseShift (toks: Token list) : Result = + parseAdditive toks + |> Result.bind (fun (left, remaining) -> + let rec parseShiftRest (leftExpr: Expr) (toks: Token list) : Result = + match toks with + | TShl :: rest -> + parseAdditive rest + |> Result.bind (fun (right, remaining') -> + parseShiftRest (BinOp (Shl, leftExpr, right)) remaining') + | TShr :: rest -> + parseAdditive rest + |> Result.bind (fun (right, remaining') -> + parseShiftRest (BinOp (Shr, leftExpr, right)) remaining') + | _ -> Ok (leftExpr, toks) + parseShiftRest left remaining) + + and parseAdditive (toks: Token list) : Result = + parseMultiplicative toks + |> Result.bind (fun (left, remaining) -> + let rec parseAdditiveRest (leftExpr: Expr) (toks: Token list) : Result = + match toks with + | TPlus :: rest -> + parseMultiplicative rest + |> Result.bind (fun (right, remaining') -> + parseAdditiveRest (BinOp (Add, leftExpr, right)) remaining') + | TMinus :: rest -> + parseMultiplicative rest + |> Result.bind (fun (right, remaining') -> + parseAdditiveRest (BinOp (Sub, leftExpr, right)) remaining') + | TPlusPlus :: rest -> + parseMultiplicative rest + |> Result.bind (fun (right, remaining') -> + parseAdditiveRest (BinOp (StringConcat, leftExpr, right)) remaining') + | _ -> Ok (leftExpr, toks) + parseAdditiveRest left remaining) + + and parseMultiplicative (toks: Token list) : Result = + parseUnary toks + |> Result.bind (fun (left, remaining) -> + let rec parseMultiplicativeRest (leftExpr: Expr) (toks: Token list) : Result = + match toks with + | TStar :: rest -> + parseUnary rest + |> Result.bind (fun (right, remaining') -> + parseMultiplicativeRest (BinOp (Mul, leftExpr, right)) remaining') + | TSlash :: rest -> + parseUnary rest + |> Result.bind (fun (right, remaining') -> + parseMultiplicativeRest (BinOp (Div, leftExpr, right)) remaining') + | TPercent :: rest -> + parseUnary rest + |> Result.bind (fun (right, remaining') -> + parseMultiplicativeRest (BinOp (Mod, leftExpr, right)) remaining') + | _ -> Ok (leftExpr, toks) + parseMultiplicativeRest left remaining) + + and parseUnary (toks: Token list) : Result = + match toks with + // Negative integer literals - parse directly as negative values + | TMinus :: TInt64 n :: rest -> Ok (Int64Literal (-n), rest) + | TMinus :: TInt128 n :: rest when n = System.Int128.MinValue -> + Ok (Int128Literal System.Int128.MinValue, rest) + | TMinus :: TInt128 n :: rest -> Ok (Int128Literal (-n), rest) + | TMinus :: TInt8 n :: rest when n = System.SByte.MinValue -> + Ok (Int8Literal System.SByte.MinValue, rest) + | TMinus :: TInt8 n :: rest -> Ok (Int8Literal (-n), rest) + | TMinus :: TInt16 n :: rest when n = System.Int16.MinValue -> + Ok (Int16Literal System.Int16.MinValue, rest) + | TMinus :: TInt16 n :: rest -> Ok (Int16Literal (-n), rest) + | TMinus :: TInt32 n :: rest when n = System.Int32.MinValue -> + Ok (Int32Literal System.Int32.MinValue, rest) + | TMinus :: TInt32 n :: rest -> Ok (Int32Literal (-n), rest) + | TMinus :: TFloat f :: rest -> Ok (FloatLiteral (-f), rest) + | TMinus :: rest -> + // For non-literal expressions, use UnaryOp + parseUnary rest + |> Result.map (fun (expr, remaining) -> (UnaryOp (Neg, expr), remaining)) + | TNot :: rest -> + parseUnary rest + |> Result.map (fun (expr, remaining) -> (UnaryOp (Not, expr), remaining)) + | TBitNot :: rest -> + parseUnary rest + |> Result.map (fun (expr, remaining) -> (UnaryOp (BitNot, expr), remaining)) + | _ -> + parsePrimary toks + + and parsePrimary (toks: Token list) : Result = + // Parse a primary expression, then handle any postfix operations + parsePrimaryBase toks + |> Result.bind (fun (expr, remaining) -> + parsePostfix expr remaining) + + // Parse a qualified identifier chain: Stdlib.Int64.add + // Returns the full qualified name and remaining tokens + and parseQualifiedIdent (firstName: string) (toks: Token list) : string * Token list = + match toks with + | TDot :: TIdent nextName :: rest -> + // Continue the chain: firstName.nextName... + let (fullName, remaining) = parseQualifiedIdent nextName rest + (firstName + "." + fullName, remaining) + | _ -> + // End of chain + (firstName, toks) + + and parsePrimaryBase (toks: Token list) : Result = + match toks with + | TInt64 n :: rest -> Ok (Int64Literal n, rest) + | TInt128 n :: rest -> Ok (Int128Literal n, rest) + | TInt8 n :: rest -> Ok (Int8Literal n, rest) + | TInt16 n :: rest -> Ok (Int16Literal n, rest) + | TInt32 n :: rest -> Ok (Int32Literal n, rest) + | TUInt8 n :: rest -> Ok (UInt8Literal n, rest) + | TUInt16 n :: rest -> Ok (UInt16Literal n, rest) + | TUInt32 n :: rest -> Ok (UInt32Literal n, rest) + | TUInt64 n :: rest -> Ok (UInt64Literal n, rest) + | TUInt128 n :: rest -> Ok (UInt128Literal n, rest) + | TFloat f :: rest -> Ok (FloatLiteral f, rest) + | TStringLit s :: rest -> Ok (StringLiteral s, rest) + | TCharLit s :: rest -> Ok (CharLiteral s, rest) + | TInterpString parts :: rest -> + // Parse interpolated string into AST.InterpolatedString + let rec parseInterpParts (parts: InterpPart list) (acc: AST.StringPart list) : Result = + match parts with + | [] -> Ok (List.rev acc) + | InterpText s :: remaining -> + parseInterpParts remaining (AST.StringText s :: acc) + | InterpTokens tokens :: remaining -> + // Parse the tokens as an expression + match parseExpr (tokens @ [TEOF]) with + | Ok (expr, [TEOF]) -> + parseInterpParts remaining (AST.StringExpr expr :: acc) + | Ok (_, leftover) -> + Error $"Unexpected tokens after interpolated expression: {leftover}" + | Error err -> + Error $"Error parsing interpolated expression: {err}" + match parseInterpParts parts [] with + | Ok astParts -> Ok (InterpolatedString astParts, rest) + | Error err -> Error err + | TTrue :: rest -> Ok (BoolLiteral true, rest) + | TFalse :: rest -> Ok (BoolLiteral false, rest) + // Qualified identifier: Stdlib.Int64.add, Module.func, or Stdlib.Result.Result.Ok + | TIdent name :: TDot :: TIdent nextName :: rest when System.Char.IsUpper(name.[0]) -> + // Parse the full qualified name + let (qualifiedTail, afterQualified) = parseQualifiedIdent nextName rest + let fullName = name + "." + qualifiedTail + // Check if the last segment is uppercase (constructor) or lowercase (function) + let lastDotIdx = fullName.LastIndexOf('.') + let lastSegment = if lastDotIdx >= 0 then fullName.Substring(lastDotIdx + 1) else fullName + let isConstructor = System.Char.IsUpper(lastSegment.[0]) + // Check what follows - function call, constructor, or variable reference + match afterQualified with + | TLBrace :: recordFieldsStart when isConstructor -> + // Qualified record literal: Module.TypeName { field = value, ... } + parseRecordLiteralFieldsWithTypeName fullName recordFieldsStart [] + | TLParen :: argsStart when isConstructor -> + // Qualified constructor with payload: Stdlib.Result.Result.Ok(5) + // Split into type name and variant name + let typeName = fullName.Substring(0, lastDotIdx) + let variantName = lastSegment + parseExpr argsStart + |> Result.bind (fun (payloadExpr, remaining) -> + match remaining with + | TRParen :: rest' -> + Ok (Constructor (typeName, variantName, Some payloadExpr), rest') + | _ -> Error "Expected ')' after constructor payload") + | _ when isConstructor -> + // Qualified constructor without payload: Stdlib.Color.Red + let typeName = fullName.Substring(0, lastDotIdx) + let variantName = lastSegment + Ok (Constructor (typeName, variantName, None), afterQualified) + | TLt :: typeArgsStart -> + // Qualified generic function call: Stdlib.List.length(args) + let looksLikeTypeArgs tokens = + match parseTypeArgs tokens [] with + | Ok (_, afterTypes) -> + match afterTypes with + | TLParen :: _ -> true + | _ when canStartSpaceApplicationArg afterTypes -> true + | _ -> false + | Error _ -> false + if looksLikeTypeArgs typeArgsStart then + parseTypeArgs typeArgsStart [] + |> Result.bind (fun (typeArgs, afterTypes) -> + match afterTypes with + | TLParen :: argsStart -> + parseCallArgs argsStart [] + |> Result.map (fun (args, remaining) -> + (TypeApp (fullName, typeArgs, args), remaining)) + | _ when canStartSpaceApplicationArg afterTypes -> + parseSpaceApplicationArgs afterTypes [] + |> Result.map (fun (args, remaining) -> + (TypeApp (fullName, typeArgs, NonEmptyList.fromList args), remaining)) + | _ -> + Error $"Expected '(' or space-applied argument after type arguments in generic call to {fullName}") + else + // Not type args, treat as variable reference and leave < for comparison + Ok (Var fullName, TLt :: typeArgsStart) + | TLParen :: argsStart -> + // Qualified function call: Stdlib.Int64.add(args) + parseCallArgs argsStart [] + |> Result.map (fun (args, remaining) -> + (Call (fullName, args), remaining)) + | _ -> + // Qualified variable reference (function as value) + Ok (Var fullName, afterQualified) + | TIdent name :: TLt :: rest when not (System.Char.IsUpper(name.[0])) -> + // Could be generic function call: name(args) + // Or could be comparison: name < expr + // Disambiguate by looking for pattern: ident (> | ,ident)* > ( + // i.e., a sequence of identifiers/types followed by > and then ( + let rec looksLikeGenericCall tokens = + match tokens with + | TIdent _ :: TGt :: TLParen :: _ -> true // Single type arg: name( + | TIdent _ :: TComma :: rest -> looksLikeGenericCall rest // More args: name // Nested List<...> + // Skip past nested generic type + let rec skipNested toks depth = + match toks with + | TGt :: remaining when depth = 1 -> Some remaining + | TGt :: remaining -> skipNested remaining (depth - 1) + | TShr :: remaining when depth = 1 -> Some (TGt :: remaining) // >> is two >'s + | TShr :: remaining when depth = 2 -> Some remaining // both >'s consumed + | TShr :: remaining -> skipNested remaining (depth - 2) // >> decreases by 2 + | TLt :: remaining -> skipNested remaining (depth + 1) + | _ :: remaining -> skipNested remaining depth + | [] -> None + match skipNested rest 1 with + | Some (TGt :: TLParen :: _) -> true + | Some (TShr :: _) -> true // >> followed by ( - TShr has one > left for outer + | Some (TComma :: rest') -> looksLikeGenericCall rest' + | _ -> false + | TIdent "Dict" :: TLt :: rest -> // Nested Dict<...> + // Skip past nested generic type + let rec skipNested toks depth = + match toks with + | TGt :: remaining when depth = 1 -> Some remaining + | TGt :: remaining -> skipNested remaining (depth - 1) + | TShr :: remaining when depth = 1 -> Some (TGt :: remaining) // >> is two >'s + | TShr :: remaining when depth = 2 -> Some remaining // both >'s consumed + | TShr :: remaining -> skipNested remaining (depth - 2) // >> decreases by 2 + | TLt :: remaining -> skipNested remaining (depth + 1) + | _ :: remaining -> skipNested remaining depth + | [] -> None + match skipNested rest 1 with + | Some (TGt :: TLParen :: _) -> true + | Some (TShr :: _) -> true // >> followed by ( - TShr has one > left for outer + | Some (TComma :: rest') -> looksLikeGenericCall rest' + | _ -> false + | TLParen :: rest -> // Tuple type: (Type1, Type2, ...) + // Skip until matching ) + let rec skipParens toks depth = + match toks with + | TRParen :: remaining when depth = 1 -> Some remaining + | TRParen :: remaining -> skipParens remaining (depth - 1) + | TLParen :: remaining -> skipParens remaining (depth + 1) + | _ :: remaining -> skipParens remaining depth + | [] -> None + match skipParens rest 1 with + | Some (TGt :: TLParen :: _) -> true // (T1, T2)>( + | Some (TShr :: _) -> true // >> followed by ( - TShr has one > left for outer + | Some (TComma :: rest') -> looksLikeGenericCall rest' // (T1, T2), more types + | Some (TArrow :: _) -> true // Function type: (T1, T2) -> R + | _ -> false + | _ -> false + if looksLikeGenericCall rest then + // Parse as generic call + parseTypeArgs rest [] + |> Result.bind (fun (typeArgs, afterTypes) -> + match afterTypes with + | TLParen :: argsStart -> + parseCallArgs argsStart [] + |> Result.map (fun (args, remaining) -> + (TypeApp (name, typeArgs, args), remaining)) + | _ -> Error "Expected '(' after type arguments in generic call") + else + // Not a type application, treat name as variable and let comparison parsing handle < + Ok (Var name, TLt :: rest) + | TIdent name :: TLParen :: rest when not (System.Char.IsUpper(name.[0])) -> + // Function call: name(args) - only for lowercase names + parseCallArgs rest [] + |> Result.map (fun (args, remaining) -> + (Call (name, args), remaining)) + | TIdent name :: TLParen :: rest when System.Char.IsUpper(name.[0]) -> + // Constructor with payload: Constructor(payload) + parseExpr rest + |> Result.bind (fun (payloadExpr, remaining) -> + match remaining with + | TRParen :: rest' -> + Ok (Constructor ("", name, Some payloadExpr), rest') + | _ -> Error "Expected ')' after constructor payload") + | TIdent typeName :: TLBrace :: rest when System.Char.IsUpper(typeName.[0]) -> + // Record literal with type name: Point { x = 1, y = 2 } + parseRecordLiteralFieldsWithTypeName typeName rest [] + | TIdent name :: rest when System.Char.IsUpper(name.[0]) -> + // Constructor without payload (enum variant) + Ok (Constructor ("", name, None), rest) + | TIdent name :: rest -> + // Variable reference (lowercase identifier) + Ok (Var name, rest) + | TLParen :: TRParen :: rest -> + // Unit literal: () + Ok (UnitLiteral, rest) + | TLParen :: rest -> + // Could be lambda, parenthesized expression, tuple literal, or operator section + // Check for operator section: (&&), (||), (+), (-), (*), (/), etc. + match rest with + | TAnd :: TRParen :: afterOp -> + // (&&) - operator section, parse the right operand + parseUnary afterOp + |> Result.map (fun (rightArg, remaining) -> + // Create lambda: \$x -> $x && rightArg + let lambda = + Lambda (NonEmptyList.singleton ("$pipe_arg", TBool), BinOp (And, Var "$pipe_arg", rightArg)) + (lambda, remaining)) + | TOr :: TRParen :: afterOp -> + // (||) - operator section + parseUnary afterOp + |> Result.map (fun (rightArg, remaining) -> + let lambda = + Lambda (NonEmptyList.singleton ("$pipe_arg", TBool), BinOp (Or, Var "$pipe_arg", rightArg)) + (lambda, remaining)) + | _ -> + // Check if it looks like lambda params: (ident : type, ...) => + match tryParseLambdaParams rest with + | Some (lambdaParams, TFatArrow :: bodyStart) -> + // It's a lambda: (params) => body + parseExpr bodyStart + |> Result.map (fun (body, remaining) -> + (Lambda (lambdaParams, body), remaining)) + | _ -> + // Not a lambda - parse as expression/tuple + parseExpr rest + |> Result.bind (fun (firstExpr, remaining) -> + match remaining with + | TRParen :: rest' -> + // Parenthesized expression (single element) + Ok (firstExpr, rest') + | TComma :: rest' -> + // Tuple literal: (expr, expr, ...) + parseTupleElements rest' [firstExpr] + | _ -> Error "Expected ')' or ',' in tuple/parenthesized expression") + | TLBrace :: rest -> + // Distinguish between: + // - anonymous record literal: { field = value, ... } + // - record update: { recordExpr with field = value, ... } + match rest with + | TRBrace :: _ -> + parseRecordLiteralFieldsWithTypeName "" rest [] + | TIdent _ :: TEquals :: _ -> + parseRecordLiteralFieldsWithTypeName "" rest [] + | _ -> + parseExpr rest + |> Result.bind (fun (recordExpr, afterExpr) -> + match afterExpr with + | TWith :: afterWith -> + // Record update: { record with field = value, ... } + parseRecordUpdateFields afterWith [] + |> Result.map (fun (updates, remaining) -> + (RecordUpdate (recordExpr, updates), remaining)) + | _ -> Error "Record update requires 'with' keyword: use '{ record with field = value, ... }'") + | TLBracket :: rest -> + // List literal: [1, 2, 3] or [] + parseListLiteralElements rest [] + | _ -> Error "Expected expression" + + and parseTupleElements (toks: Token list) (acc: Expr list) : Result = + // Parse remaining tuple elements after the first comma + parseExpr toks + |> Result.bind (fun (expr, remaining) -> + match remaining with + | TComma :: rest -> + // More elements + parseTupleElements rest (expr :: acc) + | TRParen :: rest -> + // End of tuple + let elements = List.rev (expr :: acc) + Ok (TupleLiteral elements, rest) + | _ -> Error "Expected ',' or ')' in tuple literal") + + and parseRecordLiteralFieldsWithTypeName (typeName: string) (toks: Token list) (acc: (string * Expr) list) : Result = + // Parse record literal fields with explicit type name: TypeName { name = expr, ... } + match toks with + | TRBrace :: rest -> + // Empty record or end of fields + Ok (RecordLiteral (typeName, List.rev acc), rest) + | TIdent fieldName :: TEquals :: rest -> + parseExpr rest + |> Result.bind (fun (value, remaining) -> + match remaining with + | TComma :: rest' -> + // More fields + parseRecordLiteralFieldsWithTypeName typeName rest' ((fieldName, value) :: acc) + | TRBrace :: rest' -> + // End of record + Ok (RecordLiteral (typeName, List.rev ((fieldName, value) :: acc)), rest') + | _ -> Error "Expected ',' or '}' after record field value") + | _ -> Error "Expected field name in record literal" + + and parseRecordUpdateFields (toks: Token list) (acc: (string * Expr) list) : Result<(string * Expr) list * Token list, string> = + // Parse record update fields: field = expr, field = expr, ... } + match toks with + | TRBrace :: rest -> + // End of fields + Ok (List.rev acc, rest) + | TIdent fieldName :: TEquals :: rest -> + parseExpr rest + |> Result.bind (fun (value, remaining) -> + match remaining with + | TComma :: rest' -> + // More fields + parseRecordUpdateFields rest' ((fieldName, value) :: acc) + | TRBrace :: rest' -> + // End of record update + Ok (List.rev ((fieldName, value) :: acc), rest') + | _ -> Error "Expected ',' or '}' after record update field value") + | _ -> Error "Expected field name in record update" + + and parseListLiteralElements (toks: Token list) (acc: Expr list) : Result = + // Parse list literal elements: [expr, expr, ...] or [] or [a, b, ...rest] + match toks with + | TRBracket :: rest -> + // Empty list or end of list + Ok (ListLiteral (List.rev acc), rest) + | TDotDotDot :: rest -> + // Spread at start: [...tail] + parseExpr rest + |> Result.bind (fun (tailExpr, remaining) -> + match remaining with + | TRBracket :: rest' -> + Ok (ListCons (List.rev acc, tailExpr), rest') + | _ -> Error "Expected ']' after spread expression") + | _ -> + parseExpr toks + |> Result.bind (fun (expr, remaining) -> + match remaining with + | TComma :: TDotDotDot :: rest -> + // Spread after elements: [a, b, ...tail] + parseExpr rest + |> Result.bind (fun (tailExpr, remaining') -> + match remaining' with + | TRBracket :: rest' -> + Ok (ListCons (List.rev (expr :: acc), tailExpr), rest') + | _ -> Error "Expected ']' after spread expression") + | TComma :: rest -> + // More elements + parseListLiteralElements rest (expr :: acc) + | TRBracket :: rest -> + // End of list + Ok (ListLiteral (List.rev (expr :: acc)), rest) + | _ -> Error "Expected ',' or ']' in list literal") + + and parsePostfix (expr: Expr) (toks: Token list) : Result = + // Handle postfix operations: tuple access (.0, .1), field access (.fieldName), or function application (args) + match toks with + | TDot :: TInt64 index :: rest -> + if index < 0L then + Error "Tuple index cannot be negative" + else + let accessExpr = TupleAccess (expr, int index) + parsePostfix accessExpr rest + | TDot :: TIdent fieldName :: rest -> + // Record field access + let accessExpr = RecordAccess (expr, fieldName) + parsePostfix accessExpr rest + | TLParen :: rest -> + // Function application: expr(args) + // Only allow if expr is not a simple named variable (those are handled by Call) + match expr with + | Var _ -> + // This is handled by Call in parsePrimaryBase, not Apply + // But if we get here with a Var, it means the Var came from a postfix + // chain (e.g., x.field(args)), so we should use Apply + parseCallArgs rest [] + |> Result.bind (fun (args, remaining) -> + let applyExpr = Apply (expr, args) + parsePostfix applyExpr remaining) + | _ -> + // Lambda or other expression being applied + parseCallArgs rest [] + |> Result.bind (fun (args, remaining) -> + let applyExpr = Apply (expr, args) + parsePostfix applyExpr remaining) + | _ -> Ok (expr, toks) + + and parseSpaceApplicationArgs (toks: Token list) (acc: Expr list) : Result = + if canStartSpaceApplicationArg toks then + parsePrimaryBase toks + |> Result.bind (fun (argBaseExpr, afterArgBase) -> + parsePostfix argBaseExpr afterArgBase + |> Result.bind (fun (argExpr, afterArg) -> + parseSpaceApplicationArgs afterArg (argExpr :: acc))) + else + Ok (List.rev acc, toks) + + and parseCallArgs (toks: Token list) (acc: Expr list) : Result * Token list, string> = + match toks with + | TRParen :: rest -> + // End of arguments + let reversed = List.rev acc + let normalizedArgs = + match reversed with + | [] -> NonEmptyList.singleton UnitLiteral + | _ -> NonEmptyList.fromList reversed + Ok (normalizedArgs, rest) + | _ -> + // Parse an argument expression + parseExpr toks + |> Result.bind (fun (expr, remaining) -> + match remaining with + | TComma :: rest -> + // More arguments + parseCallArgs rest (expr :: acc) + | TRParen :: rest -> + // End of arguments + Ok (NonEmptyList.fromList (List.rev (expr :: acc)), rest) + | _ -> Error "Expected ',' or ')' after function argument") + + // Parse top-level elements (functions or expressions) + let rec parseTopLevels (toks: Token list) (acc: TopLevel list) : Result = + match toks with + | TEOF :: [] -> + // End of input + if List.isEmpty acc then + Error "Empty program" + else + Ok (Program (List.rev acc)) + + | TDef :: _ -> + // Parse function definition + parseFunctionDef toks parseExpr + |> Result.bind (fun (funcDef, remaining) -> + parseTopLevels remaining (FunctionDef funcDef :: acc)) + + | TType :: _ -> + // Parse type definition + parseTypeDef toks + |> Result.bind (fun (typeDef, remaining) -> + parseTopLevels remaining (TypeDef typeDef :: acc)) + + | _ -> + // Parse expression + parseExpr toks + |> Result.bind (fun (expr, remaining) -> + match remaining with + | TEOF :: [] -> + // Single expression program + Ok (Program (List.rev (Expression expr :: acc))) + | _ -> + // More top-level definitions after expression not allowed for now + Error "Unexpected tokens after expression (only function definitions can be followed by more definitions)") + + parseTopLevels tokens [] + +let private isInternalIdentifier (name: string) : bool = + let isAllUnderscores = name |> Seq.forall (fun c -> c = '_') + (name.StartsWith("__") && not isAllUnderscores) || name.Contains(".__") + +let private validateNoInternalIdentifier (name: string) : Result = + if isInternalIdentifier name then + Error $"Internal identifier not allowed in user code: {name}" + else + Ok () + +let rec private validatePattern (pattern: Pattern) : Result = + match pattern with + | PVar name -> validateNoInternalIdentifier name + | PConstructor (_, payload) -> + match payload with + | None -> Ok () + | Some inner -> validatePattern inner + | PTuple patterns -> + patterns + |> List.fold (fun acc p -> Result.bind (fun () -> validatePattern p) acc) (Ok ()) + | PRecord (_, fields) -> + fields + |> List.fold (fun acc (_, p) -> Result.bind (fun () -> validatePattern p) acc) (Ok ()) + | PList patterns -> + patterns + |> List.fold (fun acc p -> Result.bind (fun () -> validatePattern p) acc) (Ok ()) + | PListCons (head, tail) -> + let headResult = + head |> List.fold (fun acc p -> Result.bind (fun () -> validatePattern p) acc) (Ok ()) + Result.bind (fun () -> validatePattern tail) headResult + | PUnit + | PWildcard + | PInt64 _ + | PInt128Literal _ + | PInt8Literal _ + | PInt16Literal _ + | PInt32Literal _ + | PUInt8Literal _ + | PUInt16Literal _ + | PUInt32Literal _ + | PUInt64Literal _ + | PUInt128Literal _ + | PBool _ + | PString _ + | PChar _ + | PFloat _ -> Ok () + +let rec private validateExpr (expr: Expr) : Result = + match expr with + | Let (name, value, body) -> + validateNoInternalIdentifier name + |> Result.bind (fun () -> validateExpr value) + |> Result.bind (fun () -> validateExpr body) + | Var name -> validateNoInternalIdentifier name + | Call (funcName, args) -> + validateNoInternalIdentifier funcName + |> Result.bind (fun () -> + args + |> NonEmptyList.toList + |> List.fold (fun acc arg -> Result.bind (fun () -> validateExpr arg) acc) (Ok ())) + | TypeApp (funcName, _, args) -> + validateNoInternalIdentifier funcName + |> Result.bind (fun () -> + args + |> NonEmptyList.toList + |> List.fold (fun acc arg -> Result.bind (fun () -> validateExpr arg) acc) (Ok ())) + | InterpolatedString parts -> + parts + |> List.fold (fun acc part -> + match part with + | StringText _ -> acc + | StringExpr inner -> Result.bind (fun () -> validateExpr inner) acc) (Ok ()) + | BinOp (_, left, right) -> + validateExpr left |> Result.bind (fun () -> validateExpr right) + | UnaryOp (_, inner) -> validateExpr inner + | If (cond, thenBranch, elseBranch) -> + validateExpr cond + |> Result.bind (fun () -> validateExpr thenBranch) + |> Result.bind (fun () -> validateExpr elseBranch) + | TupleLiteral elems -> + elems |> List.fold (fun acc e -> Result.bind (fun () -> validateExpr e) acc) (Ok ()) + | TupleAccess (tupleExpr, _) -> validateExpr tupleExpr + | RecordLiteral (_, fields) -> + fields |> List.fold (fun acc (_, e) -> Result.bind (fun () -> validateExpr e) acc) (Ok ()) + | RecordUpdate (recordExpr, updates) -> + validateExpr recordExpr + |> Result.bind (fun () -> + updates |> List.fold (fun acc (_, e) -> Result.bind (fun () -> validateExpr e) acc) (Ok ())) + | RecordAccess (recordExpr, _) -> validateExpr recordExpr + | Constructor (_, _, payload) -> + match payload with + | None -> Ok () + | Some inner -> validateExpr inner + | Match (scrutinee, cases) -> + let validateCase (case: MatchCase) : Result = + let patternsResult = + case.Patterns + |> NonEmptyList.toList + |> List.fold (fun acc p -> Result.bind (fun () -> validatePattern p) acc) (Ok ()) + patternsResult + |> Result.bind (fun () -> + match case.Guard with + | None -> Ok () + | Some guardExpr -> validateExpr guardExpr) + |> Result.bind (fun () -> validateExpr case.Body) + validateExpr scrutinee + |> Result.bind (fun () -> + cases |> List.fold (fun acc case -> Result.bind (fun () -> validateCase case) acc) (Ok ())) + | ListLiteral elems -> + elems |> List.fold (fun acc e -> Result.bind (fun () -> validateExpr e) acc) (Ok ()) + | ListCons (head, tail) -> + let headResult = head |> List.fold (fun acc e -> Result.bind (fun () -> validateExpr e) acc) (Ok ()) + Result.bind (fun () -> validateExpr tail) headResult + | Lambda (parameters, body) -> + parameters + |> NonEmptyList.toList + |> List.fold (fun acc (name, _) -> Result.bind (fun () -> validateNoInternalIdentifier name) acc) (Ok ()) + |> Result.bind (fun () -> validateExpr body) + | Apply (funcExpr, args) -> + validateExpr funcExpr + |> Result.bind (fun () -> + args + |> NonEmptyList.toList + |> List.fold (fun acc e -> Result.bind (fun () -> validateExpr e) acc) (Ok ())) + | FuncRef funcName -> validateNoInternalIdentifier funcName + | Closure (funcName, captures) -> + validateNoInternalIdentifier funcName + |> Result.bind (fun () -> + captures |> List.fold (fun acc e -> Result.bind (fun () -> validateExpr e) acc) (Ok ())) + | UnitLiteral | Int64Literal _ | Int128Literal _ | Int8Literal _ | Int16Literal _ | Int32Literal _ + | UInt8Literal _ | UInt16Literal _ | UInt32Literal _ | UInt64Literal _ | UInt128Literal _ + | BoolLiteral _ | StringLiteral _ | CharLiteral _ | FloatLiteral _ -> Ok () + +let private validateNoInternalIdentifiers (Program items) : Result = + let validateTopLevel (item: TopLevel) : Result = + match item with + | FunctionDef def -> + validateNoInternalIdentifier def.Name + |> Result.bind (fun () -> + def.Params + |> NonEmptyList.toList + |> List.fold (fun acc (name, _) -> Result.bind (fun () -> validateNoInternalIdentifier name) acc) (Ok ())) + |> Result.bind (fun () -> validateExpr def.Body) + | TypeDef _ -> Ok () + | Expression expr -> validateExpr expr + items + |> List.fold (fun acc item -> Result.bind (fun () -> validateTopLevel item) acc) (Ok ()) + |> Result.map (fun () -> Program items) + +/// Parse a string directly to AST +let parseString (allowInternal: bool) (input: string) : Result = + lex input + |> Result.bind parse + |> Result.bind (fun program -> + if allowInternal then Ok program + else validateNoInternalIdentifiers program) diff --git a/backend/src/LibCompiler/passes/2.3_ANF_Optimize.fs b/backend/src/LibCompiler/passes/2.3_ANF_Optimize.fs new file mode 100644 index 0000000000..f9a20c7663 --- /dev/null +++ b/backend/src/LibCompiler/passes/2.3_ANF_Optimize.fs @@ -0,0 +1,531 @@ +// 2.3_ANF_Optimize.fs - ANF Optimization Pass +// +// Performs optimizations on ANF before reference counting: +// - Constant folding: evaluate constant expressions at compile time +// - Constant propagation: replace variable uses with constant definitions +// - Copy propagation: eliminate trivial bindings +// - Dead code elimination: remove unused bindings +// - Strength reduction: replace pow2 mul/div/mod with shifts/bitwise ops +// +// These optimizations run in a loop until no more changes occur. + +module ANF_Optimize + +open ANF + +/// Environment mapping TempIds to their constant values (for propagation) +type ConstEnv = Map + +/// Optimization toggles for ANF optimization passes +type OptimizeOptions = { + EnableConstFolding: bool + EnableConstProp: bool + EnableCopyProp: bool + EnableDCE: bool + EnableStrengthReduction: bool +} + +let defaultOptimizeOptions = { + EnableConstFolding = true + EnableConstProp = true + EnableCopyProp = true + EnableDCE = true + EnableStrengthReduction = true +} + +/// Check if n is a power of 2, and if so return its log2 +/// Returns None if n is not a power of 2 or is <= 0 +let tryLog2 (n: int64) : int64 option = + if n <= 0L || (n &&& (n - 1L)) <> 0L then None + else + let rec countBits acc x = + if x = 1L then acc + else countBits (acc + 1L) (x >>> 1) + Some (countBits 0L n) + +/// Euclidean modulo: result has the sign of the divisor +let euclideanMod (a: int64) (b: int64) : int64 = + let remainder = a % b + if remainder = 0L then 0L + elif (remainder > 0L && b < 0L) || (remainder < 0L && b > 0L) then remainder + b + else remainder + +/// Fold a binary operation on constants +/// Only folds Int64 for now - other integer types need proper overflow handling at runtime +let foldBinOp (op: BinOp) (left: Atom) (right: Atom) : CExpr option = + match op, left, right with + // Int64 arithmetic (unchecked - overflow wraps) + | Add, IntLiteral (Int64 a), IntLiteral (Int64 b) -> Some (Atom (IntLiteral (Int64 (a + b)))) + | Sub, IntLiteral (Int64 a), IntLiteral (Int64 b) -> Some (Atom (IntLiteral (Int64 (a - b)))) + | Mul, IntLiteral (Int64 a), IntLiteral (Int64 b) -> Some (Atom (IntLiteral (Int64 (a * b)))) + | Div, IntLiteral (Int64 a), IntLiteral (Int64 b) when b <> 0L && not (a = System.Int64.MinValue && b = -1L) -> Some (Atom (IntLiteral (Int64 (a / b)))) + // Skip folding INT64_MIN / -1 - F# throws but runtime handles it (returns INT64_MIN) + | Div, IntLiteral (Int64 _), IntLiteral (Int64 _) -> None + | Mod, IntLiteral (Int64 a), IntLiteral (Int64 b) when b > 0L -> Some (Atom (IntLiteral (Int64 (euclideanMod a b)))) + + // Float arithmetic + | Add, FloatLiteral a, FloatLiteral b -> Some (Atom (FloatLiteral (a + b))) + | Sub, FloatLiteral a, FloatLiteral b -> Some (Atom (FloatLiteral (a - b))) + | Mul, FloatLiteral a, FloatLiteral b -> Some (Atom (FloatLiteral (a * b))) + | Div, FloatLiteral a, FloatLiteral b -> Some (Atom (FloatLiteral (a / b))) + + // Int64 comparisons + | Eq, IntLiteral (Int64 a), IntLiteral (Int64 b) -> Some (Atom (BoolLiteral (a = b))) + | Neq, IntLiteral (Int64 a), IntLiteral (Int64 b) -> Some (Atom (BoolLiteral (a <> b))) + | Lt, IntLiteral (Int64 a), IntLiteral (Int64 b) -> Some (Atom (BoolLiteral (a < b))) + | Gt, IntLiteral (Int64 a), IntLiteral (Int64 b) -> Some (Atom (BoolLiteral (a > b))) + | Lte, IntLiteral (Int64 a), IntLiteral (Int64 b) -> Some (Atom (BoolLiteral (a <= b))) + | Gte, IntLiteral (Int64 a), IntLiteral (Int64 b) -> Some (Atom (BoolLiteral (a >= b))) + + // Boolean comparisons + | Eq, BoolLiteral a, BoolLiteral b -> Some (Atom (BoolLiteral (a = b))) + | Neq, BoolLiteral a, BoolLiteral b -> Some (Atom (BoolLiteral (a <> b))) + + // Boolean operations + | And, BoolLiteral a, BoolLiteral b -> Some (Atom (BoolLiteral (a && b))) + | Or, BoolLiteral a, BoolLiteral b -> Some (Atom (BoolLiteral (a || b))) + + // String comparisons + | Eq, StringLiteral a, StringLiteral b -> Some (Atom (BoolLiteral (a = b))) + | Neq, StringLiteral a, StringLiteral b -> Some (Atom (BoolLiteral (a <> b))) + + // Algebraic identities (strength reduction) - Int64 + | Add, IntLiteral (Int64 0L), x -> Some (Atom x) + | Add, x, IntLiteral (Int64 0L) -> Some (Atom x) + | Sub, x, IntLiteral (Int64 0L) -> Some (Atom x) + | Mul, IntLiteral (Int64 1L), x -> Some (Atom x) + | Mul, x, IntLiteral (Int64 1L) -> Some (Atom x) + | Mul, IntLiteral (Int64 0L), _ -> Some (Atom (IntLiteral (Int64 0L))) + | Mul, _, IntLiteral (Int64 0L) -> Some (Atom (IntLiteral (Int64 0L))) + | Div, x, IntLiteral (Int64 1L) -> Some (Atom x) + + // Algebraic identities - Float + // Note: We skip 0.0 * x -> 0.0 because 0.0 * inf = NaN, 0.0 * NaN = NaN + | Add, FloatLiteral 0.0, x -> Some (Atom x) + | Add, x, FloatLiteral 0.0 -> Some (Atom x) + | Sub, x, FloatLiteral 0.0 -> Some (Atom x) + | Mul, FloatLiteral 1.0, x -> Some (Atom x) + | Mul, x, FloatLiteral 1.0 -> Some (Atom x) + | Div, x, FloatLiteral 1.0 -> Some (Atom x) + + // Self-subtraction: x - x -> 0 (only for Int64, not Float due to NaN) + | Sub, Var a, Var b when a = b -> Some (Atom (IntLiteral (Int64 0L))) + + // Short-circuit boolean + | And, BoolLiteral false, _ -> Some (Atom (BoolLiteral false)) + | And, _, BoolLiteral false -> Some (Atom (BoolLiteral false)) + | And, BoolLiteral true, x -> Some (Atom x) + | And, x, BoolLiteral true -> Some (Atom x) + | Or, BoolLiteral true, _ -> Some (Atom (BoolLiteral true)) + | Or, _, BoolLiteral true -> Some (Atom (BoolLiteral true)) + | Or, BoolLiteral false, x -> Some (Atom x) + | Or, x, BoolLiteral false -> Some (Atom x) + + | _ -> None + +let tryStrengthReduce (op: BinOp) (left: Atom) (right: Atom) : CExpr option = + match op, left, right with + | Mul, x, IntLiteral (Int64 n) -> + match tryLog2 n with + | Some shift -> Some (Prim (Shl, x, IntLiteral (Int64 shift))) + | None -> None + | Mul, IntLiteral (Int64 n), x -> + match tryLog2 n with + | Some shift -> Some (Prim (Shl, x, IntLiteral (Int64 shift))) + | None -> None + | Mod, x, IntLiteral (Int64 n) when n > 0L -> + // For positive power-of-two divisors, Euclidean remainder equals x & (n - 1) + match tryLog2 n with + | Some _ -> Some (Prim (BitAnd, x, IntLiteral (Int64 (n - 1L)))) + | None -> None + | Div, x, IntLiteral (Int64 n) when n > 0L -> + match tryLog2 n with + | Some shift -> Some (Prim (Shr, x, IntLiteral (Int64 shift))) + | None -> None + // Float strength reduction: 2.0 * x -> x + x + | Mul, FloatLiteral 2.0, x -> Some (Prim (Add, x, x)) + | Mul, x, FloatLiteral 2.0 -> Some (Prim (Add, x, x)) + // Float division by power of 2 -> multiplication by reciprocal + // These reciprocals are exactly representable in IEEE 754 + | Div, x, FloatLiteral 2.0 -> Some (Prim (Mul, x, FloatLiteral 0.5)) + | Div, x, FloatLiteral 4.0 -> Some (Prim (Mul, x, FloatLiteral 0.25)) + | Div, x, FloatLiteral 8.0 -> Some (Prim (Mul, x, FloatLiteral 0.125)) + | Div, x, FloatLiteral 16.0 -> Some (Prim (Mul, x, FloatLiteral 0.0625)) + | Div, x, FloatLiteral 32.0 -> Some (Prim (Mul, x, FloatLiteral 0.03125)) + | Div, x, FloatLiteral 64.0 -> Some (Prim (Mul, x, FloatLiteral 0.015625)) + | Div, x, FloatLiteral 128.0 -> Some (Prim (Mul, x, FloatLiteral 0.0078125)) + | Div, x, FloatLiteral 256.0 -> Some (Prim (Mul, x, FloatLiteral 0.00390625)) + | _ -> None + +/// Fold a unary operation on constants +let foldUnaryOp (op: UnaryOp) (src: Atom) : CExpr option = + match op, src with + // Int64 negation (unchecked - INT64_MIN wraps to itself) + | Neg, IntLiteral (Int64 n) -> Some (Atom (IntLiteral (Int64 (-n)))) + | Neg, FloatLiteral f -> Some (Atom (FloatLiteral (-f))) + | Not, BoolLiteral b -> Some (Atom (BoolLiteral (not b))) + // Bitwise NOT: flip all bits + | BitNot, IntLiteral (Int64 n) -> Some (Atom (IntLiteral (Int64 (~~~n)))) + | _ -> None + +/// Check if a CExpr has side effects +let hasSideEffects (cexpr: CExpr) : bool = + match cexpr with + | Atom _ -> false + | TypedAtom _ -> false + | Prim _ -> false + | UnaryPrim _ -> false + | IfValue _ -> false + | TupleAlloc _ -> false + | TupleGet _ -> false + // These have side effects + | Call _ -> true + | BorrowedCall _ -> true + | TailCall _ -> true + | IndirectCall _ -> true + | IndirectTailCall _ -> true + | ClosureAlloc _ -> true // Allocates memory + | ClosureCall _ -> true + | ClosureTailCall _ -> true + | StringConcat _ -> true // Allocates memory + | RefCountInc _ -> true + | RefCountDec _ -> true + | Print _ -> true + | FileReadText _ -> true + | FileExists _ -> true + | FileWriteText _ -> true + | FileAppendText _ -> true + | FileDelete _ -> true + | FileSetExecutable _ -> true + | FileWriteFromPtr _ -> true // File I/O + | RawAlloc _ -> true // Allocates memory + | RawFree _ -> true // Frees memory + | RawGet _ -> false // Pure memory read + | RawGetByte _ -> false // Pure memory read (byte) + | RawSet _ -> true // Memory mutation + | RawSetByte _ -> true // Memory mutation (byte) + | FloatSqrt _ -> false // Pure float operation + | FloatAbs _ -> false // Pure float operation + | FloatNeg _ -> false // Pure float operation + | Int64ToFloat _ -> false // Pure conversion + | FloatToInt64 _ -> false // Pure conversion + | FloatToBits _ -> false // Pure conversion + | RefCountIncString _ -> true // Mutates refcount + | RefCountDecString _ -> true // Mutates refcount + | RandomInt64 -> true // Reads from OS random source + | DateNow -> true // Reads current time (syscall) + | FloatToString _ -> false // Pure conversion (but allocates - maybe should be true?) + | RuntimeError _ -> true + +/// Collect all TempIds used in an atom +let collectAtomUses (atom: Atom) : Set = + match atom with + | Var tid -> Set.singleton tid + | _ -> Set.empty + +/// Collect all TempIds used in a CExpr +let collectCExprUses (cexpr: CExpr) : Set = + match cexpr with + | Atom a -> collectAtomUses a + | TypedAtom (a, _) -> collectAtomUses a + | Prim (_, left, right) -> Set.union (collectAtomUses left) (collectAtomUses right) + | UnaryPrim (_, src) -> collectAtomUses src + | IfValue (cond, thenVal, elseVal) -> + Set.unionMany [collectAtomUses cond; collectAtomUses thenVal; collectAtomUses elseVal] + | Call (_, args) -> args |> List.map collectAtomUses |> Set.unionMany + | BorrowedCall (_, args) -> args |> List.map collectAtomUses |> Set.unionMany + | TailCall (_, args) -> args |> List.map collectAtomUses |> Set.unionMany + | IndirectCall (func, args) -> + Set.unionMany ((collectAtomUses func) :: (args |> List.map collectAtomUses)) + | IndirectTailCall (func, args) -> + Set.unionMany ((collectAtomUses func) :: (args |> List.map collectAtomUses)) + | ClosureAlloc (_, captures) -> captures |> List.map collectAtomUses |> Set.unionMany + | ClosureCall (closure, args) -> + Set.unionMany ((collectAtomUses closure) :: (args |> List.map collectAtomUses)) + | ClosureTailCall (closure, args) -> + Set.unionMany ((collectAtomUses closure) :: (args |> List.map collectAtomUses)) + | TupleAlloc elems -> elems |> List.map collectAtomUses |> Set.unionMany + | TupleGet (tuple, _) -> collectAtomUses tuple + | StringConcat (left, right) -> Set.union (collectAtomUses left) (collectAtomUses right) + | RefCountInc (atom, _, _) -> collectAtomUses atom + | RefCountDec (atom, _, _) -> collectAtomUses atom + | Print (atom, _) -> collectAtomUses atom + | FileReadText path -> collectAtomUses path + | FileExists path -> collectAtomUses path + | FileWriteText (path, content) -> Set.union (collectAtomUses path) (collectAtomUses content) + | FileAppendText (path, content) -> Set.union (collectAtomUses path) (collectAtomUses content) + | FileDelete path -> collectAtomUses path + | FileSetExecutable path -> collectAtomUses path + | FileWriteFromPtr (path, ptr, length) -> Set.unionMany [collectAtomUses path; collectAtomUses ptr; collectAtomUses length] + | RawAlloc numBytes -> collectAtomUses numBytes + | RawFree ptr -> collectAtomUses ptr + | RawGet (ptr, byteOffset, _) -> Set.union (collectAtomUses ptr) (collectAtomUses byteOffset) + | RawGetByte (ptr, byteOffset) -> Set.union (collectAtomUses ptr) (collectAtomUses byteOffset) + | RawSet (ptr, byteOffset, value, _) -> Set.unionMany [collectAtomUses ptr; collectAtomUses byteOffset; collectAtomUses value] + | RawSetByte (ptr, byteOffset, value) -> Set.unionMany [collectAtomUses ptr; collectAtomUses byteOffset; collectAtomUses value] + | FloatSqrt atom -> collectAtomUses atom + | FloatAbs atom -> collectAtomUses atom + | FloatNeg atom -> collectAtomUses atom + | Int64ToFloat atom -> collectAtomUses atom + | FloatToInt64 atom -> collectAtomUses atom + | FloatToBits atom -> collectAtomUses atom + | RefCountIncString str -> collectAtomUses str + | RefCountDecString str -> collectAtomUses str + | RandomInt64 -> Set.empty // No atoms + | DateNow -> Set.empty // No atoms + | FloatToString atom -> collectAtomUses atom + | RuntimeError _ -> Set.empty + +/// Substitute atom in another atom +let substAtom (env: Map) (atom: Atom) : Atom = + match atom with + | Var tid -> Map.tryFind tid env |> Option.defaultValue atom + | _ -> atom + +/// Substitute atoms in CExpr +let substCExpr (env: Map) (cexpr: CExpr) : CExpr = + let s = substAtom env + match cexpr with + | Atom a -> Atom (s a) + | TypedAtom (a, t) -> TypedAtom (s a, t) + | Prim (op, left, right) -> Prim (op, s left, s right) + | UnaryPrim (op, src) -> UnaryPrim (op, s src) + | IfValue (cond, thenVal, elseVal) -> IfValue (s cond, s thenVal, s elseVal) + | Call (name, args) -> Call (name, List.map s args) + | BorrowedCall (name, args) -> BorrowedCall (name, List.map s args) + | TailCall (name, args) -> TailCall (name, List.map s args) + | IndirectCall (func, args) -> IndirectCall (s func, List.map s args) + | IndirectTailCall (func, args) -> IndirectTailCall (s func, List.map s args) + | ClosureAlloc (name, captures) -> ClosureAlloc (name, List.map s captures) + | ClosureCall (closure, args) -> ClosureCall (s closure, List.map s args) + | ClosureTailCall (closure, args) -> ClosureTailCall (s closure, List.map s args) + | TupleAlloc elems -> TupleAlloc (List.map s elems) + | TupleGet (tuple, idx) -> TupleGet (s tuple, idx) + | StringConcat (left, right) -> StringConcat (s left, s right) + | RefCountInc (atom, size, kind) -> RefCountInc (s atom, size, kind) + | RefCountDec (atom, size, kind) -> RefCountDec (s atom, size, kind) + | Print (atom, t) -> Print (s atom, t) + | FileReadText path -> FileReadText (s path) + | FileExists path -> FileExists (s path) + | FileWriteText (path, content) -> FileWriteText (s path, s content) + | FileAppendText (path, content) -> FileAppendText (s path, s content) + | FileDelete path -> FileDelete (s path) + | FileSetExecutable path -> FileSetExecutable (s path) + | FileWriteFromPtr (path, ptr, length) -> FileWriteFromPtr (s path, s ptr, s length) + | RawAlloc numBytes -> RawAlloc (s numBytes) + | RawFree ptr -> RawFree (s ptr) + | RawGet (ptr, byteOffset, valueType) -> RawGet (s ptr, s byteOffset, valueType) + | RawGetByte (ptr, byteOffset) -> RawGetByte (s ptr, s byteOffset) + | RawSet (ptr, byteOffset, value, valueType) -> RawSet (s ptr, s byteOffset, s value, valueType) + | RawSetByte (ptr, byteOffset, value) -> RawSetByte (s ptr, s byteOffset, s value) + | FloatSqrt atom -> FloatSqrt (s atom) + | FloatAbs atom -> FloatAbs (s atom) + | FloatNeg atom -> FloatNeg (s atom) + | Int64ToFloat atom -> Int64ToFloat (s atom) + | FloatToInt64 atom -> FloatToInt64 (s atom) + | FloatToBits atom -> FloatToBits (s atom) + | RefCountIncString str -> RefCountIncString (s str) + | RefCountDecString str -> RefCountDecString (s str) + | RandomInt64 -> RandomInt64 + | DateNow -> DateNow + | FloatToString atom -> FloatToString (s atom) + | RuntimeError message -> RuntimeError message + +/// Optimize a CExpr with constant folding +let optimizeCExpr (options: OptimizeOptions) (env: ConstEnv) (cexpr: CExpr) : CExpr * bool = + // First, substitute known constants + let cexpr' = substCExpr env cexpr + + let tryConstFold () = + if options.EnableConstFolding then + match cexpr' with + | Prim (op, left, right) -> + match foldBinOp op left right with + | Some folded -> Some folded + | None -> None + | UnaryPrim (op, src) -> foldUnaryOp op src + | IfValue (BoolLiteral true, thenVal, _) -> Some (Atom thenVal) + | IfValue (BoolLiteral false, _, elseVal) -> Some (Atom elseVal) + | _ -> None + else + None + + match tryConstFold () with + | Some folded -> (folded, true) + | None -> + if options.EnableStrengthReduction then + match cexpr' with + | Prim (op, left, right) -> + match tryStrengthReduce op left right with + | Some reduced -> (reduced, true) + | None -> (cexpr', cexpr' <> cexpr) + | _ -> (cexpr', cexpr' <> cexpr) + else + (cexpr', cexpr' <> cexpr) + +type OptimizeAExprResult = { + Expr: AExpr + Changed: bool + Uses: Set +} + +/// Optimize an AExpr, returning optimized expression, change flag, and used TempIds +let rec private optimizeAExprWithUses (options: OptimizeOptions) (env: ConstEnv) (aexpr: AExpr) : OptimizeAExprResult = + match aexpr with + | Return atom -> + let atom' = substAtom env atom + { + Expr = Return atom' + Changed = atom' <> atom + Uses = collectAtomUses atom' + } + + | Let (tid, cexpr, body) -> + // Optimize the CExpr + let (cexpr', cexprChanged) = optimizeCExpr options env cexpr + + // Check for copy propagation: if cexpr is just an Atom, substitute it + let (env', skipBinding) = + match cexpr' with + | Atom a when options.EnableCopyProp && not (hasSideEffects cexpr') -> + // Copy propagation: don't emit binding, just substitute + (Map.add tid a env, true) + | Atom (IntLiteral _ | BoolLiteral _ | FloatLiteral _ | StringLiteral _ | UnitLiteral as constAtom) + when options.EnableConstProp -> + // Constant propagation + (Map.add tid constAtom env, false) + | _ -> + (env, false) + + // Optimize the body + let bodyResult = optimizeAExprWithUses options env' body + + // Dead code elimination: if tid is not used in body and cexpr has no side effects + let usesInBody = bodyResult.Uses + let isDead = options.EnableDCE && not (Set.contains tid usesInBody) && not (hasSideEffects cexpr') + let usesInBodyWithoutTid = Set.remove tid usesInBody + + if skipBinding then + // Copy propagation: skip this binding entirely + { + Expr = bodyResult.Expr + Changed = true + Uses = usesInBodyWithoutTid + } + elif isDead then + // Dead code elimination + { + Expr = bodyResult.Expr + Changed = true + Uses = usesInBodyWithoutTid + } + else + let usesInCExpr = collectCExprUses cexpr' + let uses = Set.union usesInCExpr usesInBodyWithoutTid + { + Expr = Let (tid, cexpr', bodyResult.Expr) + Changed = cexprChanged || bodyResult.Changed + Uses = uses + } + + | If (cond, thenBranch, elseBranch) -> + let cond' = substAtom env cond + + // Fold constant conditions + match cond' with + | BoolLiteral true when options.EnableConstFolding -> + let thenResult = optimizeAExprWithUses options env thenBranch + { + Expr = thenResult.Expr + Changed = true + Uses = thenResult.Uses + } + | BoolLiteral false when options.EnableConstFolding -> + let elseResult = optimizeAExprWithUses options env elseBranch + { + Expr = elseResult.Expr + Changed = true + Uses = elseResult.Uses + } + | _ -> + let thenResult = optimizeAExprWithUses options env thenBranch + let elseResult = optimizeAExprWithUses options env elseBranch + let uses = Set.unionMany [collectAtomUses cond'; thenResult.Uses; elseResult.Uses] + { + Expr = If (cond', thenResult.Expr, elseResult.Expr) + Changed = cond' <> cond || thenResult.Changed || elseResult.Changed + Uses = uses + } + +/// Optimize an AExpr +let optimizeAExpr (options: OptimizeOptions) (env: ConstEnv) (aexpr: AExpr) : AExpr * bool = + let result = optimizeAExprWithUses options env aexpr + (result.Expr, result.Changed) + +/// Optimize a function +let optimizeFunction (options: OptimizeOptions) (func: Function) : Function * bool = + // Initialize env with function parameters (they're not constants) + let env = Map.empty + let (body', changed) = optimizeAExpr options env func.Body + ({ func with Body = body' }, changed) + +/// Optimize until fixed point +let rec optimizeToFixedPoint (options: OptimizeOptions) (func: Function) (maxIterations: int) : Function = + if maxIterations <= 0 then func + else + let (func', changed) = optimizeFunction options func + if changed then + optimizeToFixedPoint options func' (maxIterations - 1) + else + func' + +/// Optimize a program with explicit options +let optimizeProgramWithOptions (options: OptimizeOptions) (program: Program) : Program = + let (Program (functions, mainExpr)) = program + + // Optimize all functions + let functions' = functions |> List.map (fun f -> optimizeToFixedPoint options f 10) + + // Optimize main expression + let mainFunc = { Name = "__main__" + TypedParams = [] + ReturnType = AST.TUnit + ReturnOwnership = OwnedReturn + Body = mainExpr } + let mainOptimized = optimizeToFixedPoint options mainFunc 10 + + Program (functions', mainOptimized.Body) + +/// Optimize a program with default options +let optimizeProgram (program: Program) : Program = + optimizeProgramWithOptions defaultOptimizeOptions program + +let optimizeConstFolding (program: Program) : Program = + optimizeProgramWithOptions + { defaultOptimizeOptions with + EnableConstFolding = true + EnableConstProp = false + EnableCopyProp = false + EnableDCE = false + EnableStrengthReduction = false } + program + +let optimizeCopyProp (program: Program) : Program = + optimizeProgramWithOptions + { defaultOptimizeOptions with + EnableConstFolding = false + EnableConstProp = false + EnableCopyProp = true + EnableDCE = false + EnableStrengthReduction = false } + program + +let optimizeDCE (program: Program) : Program = + optimizeProgramWithOptions + { defaultOptimizeOptions with + EnableConstFolding = false + EnableConstProp = false + EnableCopyProp = false + EnableDCE = true + EnableStrengthReduction = false } + program diff --git a/backend/src/LibCompiler/passes/2.4_ANF_Inlining.fs b/backend/src/LibCompiler/passes/2.4_ANF_Inlining.fs new file mode 100644 index 0000000000..6b61136a90 --- /dev/null +++ b/backend/src/LibCompiler/passes/2.4_ANF_Inlining.fs @@ -0,0 +1,460 @@ +// 2.4_ANF_Inlining.fs - ANF Function Inlining Pass +// +// Inlines small, non-recursive functions at their call sites to eliminate +// function call overhead. +// +// Heuristics: +// - MaxFunctionSize: Only inline functions with <= N TempIds in body +// - MaxInlineDepth: Limit recursive inlining to prevent code explosion +// - Skip recursive functions (direct and mutual recursion via SCC detection) +// - Skip functions with closures (complex runtime behavior) +// - Skip tail calls (preserve TCO optimization) +// +// Mutual recursion detection uses Kosaraju's algorithm to find strongly +// connected components (SCCs) in the call graph. Any function in an SCC +// of size > 1, or that calls itself, is considered recursive. +// +// Literal arguments +// ----------------- +// We inline calls even when arguments are literals by binding each literal to a +// fresh TempId before inlining. This preserves ANF shape and avoids re-evaluating +// literal expressions while allowing more helpers to inline. + +module ANF_Inlining + +open ANF + +/// Inlining configuration +type InliningConfig = { + /// Maximum function body size (in TempIds) to inline + MaxFunctionSize: int + /// Maximum depth of recursive inlining + MaxInlineDepth: int +} + +/// Default inlining configuration +let defaultConfig = { + MaxFunctionSize = 20 + MaxInlineDepth = 3 +} + +/// Information about a function for inlining decisions +type FunctionInfo = { + Func: Function + Size: int // Count of TempIds (Let bindings) in body + IsRecursive: bool // Calls itself directly + HasClosures: bool // Contains ClosureAlloc or ClosureCall + CallsCount: int // Number of call sites (for future heuristics) +} + +// ============================================================================ +// Phase 1: Analysis - Build function info map +// ============================================================================ + +/// Count TempIds (Let bindings) in an expression +let rec countTempIds (expr: AExpr) : int = + match expr with + | Let (_, _, body) -> 1 + countTempIds body + | Return _ -> 0 + | If (_, thenBranch, elseBranch) -> + countTempIds thenBranch + countTempIds elseBranch + +/// Check if a CExpr contains closures +let cexprHasClosures (cexpr: CExpr) : bool = + match cexpr with + | ClosureAlloc _ | ClosureCall _ | ClosureTailCall _ -> true + | _ -> false + +/// Check if expression contains closures +let rec exprHasClosures (expr: AExpr) : bool = + match expr with + | Let (_, cexpr, body) -> + cexprHasClosures cexpr || exprHasClosures body + | Return _ -> false + | If (_, thenBranch, elseBranch) -> + exprHasClosures thenBranch || exprHasClosures elseBranch + +/// Collect all function names called in a CExpr +let collectCallsInCExpr (cexpr: CExpr) : Set = + match cexpr with + | Call (name, _) -> Set.singleton name + | TailCall (name, _) -> Set.singleton name + | _ -> Set.empty + +/// Collect all function names called in an expression +let rec collectCalls (expr: AExpr) : Set = + match expr with + | Let (_, cexpr, body) -> + Set.union (collectCallsInCExpr cexpr) (collectCalls body) + | Return _ -> Set.empty + | If (_, thenBranch, elseBranch) -> + Set.union (collectCalls thenBranch) (collectCalls elseBranch) + +// ============================================================================ +// Mutual Recursion Detection via SCC (Strongly Connected Components) +// Uses Kosaraju's algorithm to find SCCs in the call graph +// ============================================================================ + +/// Build a call graph from functions: Map> +let buildCallGraph (funcs: Function list) : Map> = + funcs + |> List.map (fun f -> (f.Name, collectCalls f.Body)) + |> Map.ofList + +/// Build reverse call graph: Map> +let buildReverseCallGraph (callGraph: Map>) : Map> = + callGraph + |> Map.fold (fun acc caller callees -> + callees + |> Set.fold (fun acc' callee -> + let existing = Map.tryFind callee acc' |> Option.defaultValue Set.empty + Map.add callee (Set.add caller existing) acc' + ) acc + ) Map.empty + +/// DFS to compute finish order (for Kosaraju's algorithm) +let rec dfsFinishOrder (graph: Map>) (node: string) + (visited: Set) (order: string list) + : Set * string list = + if Set.contains node visited then + (visited, order) + else + let visited' = Set.add node visited + let neighbors = Map.tryFind node graph |> Option.defaultValue Set.empty + let (visited'', order') = + neighbors + |> Set.fold (fun (v, o) neighbor -> + dfsFinishOrder graph neighbor v o + ) (visited', order) + (visited'', node :: order') + +/// DFS to collect SCC members +let rec dfsCollectSCC (graph: Map>) (node: string) + (visited: Set) (scc: Set) + : Set * Set = + if Set.contains node visited then + (visited, scc) + else + let visited' = Set.add node visited + let scc' = Set.add node scc + let neighbors = Map.tryFind node graph |> Option.defaultValue Set.empty + neighbors + |> Set.fold (fun (v, c) neighbor -> + dfsCollectSCC graph neighbor v c + ) (visited', scc') + +/// Find all SCCs using Kosaraju's algorithm +/// Returns list of SCCs, where each SCC is a Set of function names +let findSCCs (funcs: Function list) : Set list = + let funcNames = funcs |> List.map (fun f -> f.Name) |> Set.ofList + let callGraph = buildCallGraph funcs + let reverseGraph = buildReverseCallGraph callGraph + + // Step 1: DFS on original graph to get finish order + let (_, finishOrder) = + funcNames + |> Set.fold (fun (visited, order) name -> + dfsFinishOrder callGraph name visited order + ) (Set.empty, []) + + // Step 2: DFS on reverse graph in reverse finish order to find SCCs + let (_, sccs) = + finishOrder + |> List.fold (fun (visited, components) name -> + if Set.contains name visited then + (visited, components) + else + let (visited', scc) = dfsCollectSCC reverseGraph name visited Set.empty + (visited', scc :: components) + ) (Set.empty, []) + + sccs + +/// Find all functions involved in mutual recursion (in SCCs of size > 1) +/// or direct self-recursion (calls itself) +let findRecursiveFunctions (funcs: Function list) : Set = + let sccs = findSCCs funcs + let callGraph = buildCallGraph funcs + + // Functions in SCCs of size > 1 (mutual recursion) + let mutuallyRecursive = + sccs + |> List.filter (fun scc -> Set.count scc > 1) + |> List.fold Set.union Set.empty + + // Functions that call themselves (direct recursion) + let directlyRecursive = + funcs + |> List.filter (fun f -> + let calls = Map.tryFind f.Name callGraph |> Option.defaultValue Set.empty + Set.contains f.Name calls + ) + |> List.map (fun f -> f.Name) + |> Set.ofList + + Set.union mutuallyRecursive directlyRecursive + +/// Build function info for a single function +let buildFunctionInfo (recursiveFuncs: Set) (func: Function) : FunctionInfo = + { + Func = func + Size = countTempIds func.Body + IsRecursive = Set.contains func.Name recursiveFuncs + HasClosures = exprHasClosures func.Body + CallsCount = 0 // Will be updated later if needed + } + +/// Build function info map for all functions +let buildFunctionInfoMap (funcs: Function list) : Map = + // First, find all recursive functions (direct and mutual) + let recursiveFuncs = findRecursiveFunctions funcs + // Then build info for each function + funcs + |> List.map (fun f -> (f.Name, buildFunctionInfo recursiveFuncs f)) + |> Map.ofList + +// ============================================================================ +// Phase 2: TempId Renaming - Avoid variable conflicts when inlining +// ============================================================================ + +/// Rename an atom (substitute TempIds) +let renameAtom (mapping: Map) (atom: Atom) : Atom = + match atom with + | Var tid -> + match Map.tryFind tid mapping with + | Some newTid -> Var newTid + | None -> atom // External reference, keep as-is + | _ -> atom + +/// Rename all TempIds in a CExpr +let renameCExpr (mapping: Map) (cexpr: CExpr) : CExpr = + let r = renameAtom mapping + match cexpr with + | Atom a -> Atom (r a) + | TypedAtom (a, t) -> TypedAtom (r a, t) + | Prim (op, left, right) -> Prim (op, r left, r right) + | UnaryPrim (op, src) -> UnaryPrim (op, r src) + | IfValue (cond, thenVal, elseVal) -> IfValue (r cond, r thenVal, r elseVal) + | Call (name, args) -> Call (name, List.map r args) + | BorrowedCall (name, args) -> BorrowedCall (name, List.map r args) + | TailCall (name, args) -> TailCall (name, List.map r args) + | IndirectCall (func, args) -> IndirectCall (r func, List.map r args) + | IndirectTailCall (func, args) -> IndirectTailCall (r func, List.map r args) + | ClosureAlloc (name, captures) -> ClosureAlloc (name, List.map r captures) + | ClosureCall (closure, args) -> ClosureCall (r closure, List.map r args) + | ClosureTailCall (closure, args) -> ClosureTailCall (r closure, List.map r args) + | TupleAlloc elems -> TupleAlloc (List.map r elems) + | TupleGet (tuple, idx) -> TupleGet (r tuple, idx) + | StringConcat (left, right) -> StringConcat (r left, r right) + | RefCountInc (a, size, kind) -> RefCountInc (r a, size, kind) + | RefCountDec (a, size, kind) -> RefCountDec (r a, size, kind) + | Print (a, t) -> Print (r a, t) + | FileReadText path -> FileReadText (r path) + | FileExists path -> FileExists (r path) + | FileWriteText (path, content) -> FileWriteText (r path, r content) + | FileAppendText (path, content) -> FileAppendText (r path, r content) + | FileDelete path -> FileDelete (r path) + | FileSetExecutable path -> FileSetExecutable (r path) + | FileWriteFromPtr (path, ptr, len) -> FileWriteFromPtr (r path, r ptr, r len) + | FloatSqrt a -> FloatSqrt (r a) + | FloatAbs a -> FloatAbs (r a) + | FloatNeg a -> FloatNeg (r a) + | Int64ToFloat a -> Int64ToFloat (r a) + | FloatToInt64 a -> FloatToInt64 (r a) + | FloatToBits a -> FloatToBits (r a) + | RawAlloc numBytes -> RawAlloc (r numBytes) + | RawFree ptr -> RawFree (r ptr) + | RawGet (ptr, offset, valueType) -> RawGet (r ptr, r offset, valueType) + | RawGetByte (ptr, offset) -> RawGetByte (r ptr, r offset) + | RawSet (ptr, offset, value, valueType) -> RawSet (r ptr, r offset, r value, valueType) + | RawSetByte (ptr, offset, value) -> RawSetByte (r ptr, r offset, r value) + | RefCountIncString a -> RefCountIncString (r a) + | RefCountDecString a -> RefCountDecString (r a) + | RandomInt64 -> RandomInt64 + | DateNow -> DateNow + | FloatToString a -> FloatToString (r a) + | RuntimeError message -> RuntimeError message + +/// Rename all TempIds in an expression, allocating fresh TempIds +let rec renameExpr (mapping: Map) (varGen: VarGen) (expr: AExpr) + : AExpr * VarGen = + match expr with + | Let (tid, cexpr, body) -> + // Allocate fresh TempId for this binding + let (newTid, varGen') = freshVar varGen + let mapping' = Map.add tid newTid mapping + // Rename the CExpr (uses old mapping for references) + let cexpr' = renameCExpr mapping cexpr + // Rename the body (uses new mapping including this binding) + let (body', varGen'') = renameExpr mapping' varGen' body + (Let (newTid, cexpr', body'), varGen'') + | Return atom -> + (Return (renameAtom mapping atom), varGen) + | If (cond, thenBranch, elseBranch) -> + let (thenBranch', varGen') = renameExpr mapping varGen thenBranch + let (elseBranch', varGen'') = renameExpr mapping varGen' elseBranch + (If (renameAtom mapping cond, thenBranch', elseBranch'), varGen'') + +// ============================================================================ +// Phase 3: Inlining - Substitute function calls with bodies +// ============================================================================ + +/// Check if a function should be inlined +let shouldInline (info: FunctionInfo) (config: InliningConfig) (depth: int) : bool = + info.Size <= config.MaxFunctionSize + && not info.IsRecursive + && not info.HasClosures + && depth < config.MaxInlineDepth + +/// Substitute Return with a continuation expression +/// This replaces `Return atom` with a binding and continues with the rest +let rec substituteReturn (resultTid: TempId) (continuation: AExpr) (expr: AExpr) : AExpr = + match expr with + | Return atom -> + // Replace return with a binding to resultTid, then continue + Let (resultTid, Atom atom, continuation) + | Let (tid, cexpr, body) -> + Let (tid, cexpr, substituteReturn resultTid continuation body) + | If (cond, thenBranch, elseBranch) -> + If (cond, + substituteReturn resultTid continuation thenBranch, + substituteReturn resultTid continuation elseBranch) + +/// Bind literal arguments to fresh TempIds and build parameter mapping +let bindLiteralArgs + (parameters: TypedParam list) + (args: Atom list) + (varGen: VarGen) + : Map * (TempId * Atom) list * VarGen = + let rec loop + (paramList: TypedParam list) + (args: Atom list) + (mapping: Map) + (bindings: (TempId * Atom) list) + (varGen: VarGen) + : Map * (TempId * Atom) list * VarGen = + match paramList, args with + | [], [] -> (mapping, List.rev bindings, varGen) + | param :: restParams, arg :: restArgs -> + match arg with + | Var tid -> + loop restParams restArgs (Map.add param.Id tid mapping) bindings varGen + | _ -> + let (litTid, varGen') = freshVar varGen + loop restParams restArgs (Map.add param.Id litTid mapping) ((litTid, arg) :: bindings) varGen' + | _ -> + Crash.crash "ANF_Inlining: argument count mismatch when inlining" + + loop parameters args Map.empty [] varGen + +/// Inline a function call +/// Returns the inlined expression and updated VarGen +let inlineCall (info: FunctionInfo) (args: Atom list) (resultTid: TempId) + (continuation: AExpr) (varGen: VarGen) + : AExpr * VarGen = + // Step 1: Bind literal args and build parameter -> TempId mapping + let (paramMapping, literalBindings, varGen') = + bindLiteralArgs info.Func.TypedParams args varGen + + // Step 2: Rename all TempIds in the function body to fresh ones + let (renamedBody, varGen'') = renameExpr paramMapping varGen' info.Func.Body + + // Step 3: Insert literal bindings in front of the body + let bodyWithLiteralBindings = + List.foldBack (fun (tid, atom) acc -> Let (tid, Atom atom, acc)) literalBindings renamedBody + + // Step 4: Substitute Return with continuation + let inlinedExpr = substituteReturn resultTid continuation bodyWithLiteralBindings + + (inlinedExpr, varGen'') + +/// Recursively inline calls in an expression +let rec inlineInExpr (funcs: Map) (config: InliningConfig) + (depth: int) (varGen: VarGen) (expr: AExpr) + : AExpr * VarGen * bool = // Returns (expr, varGen, changed) + match expr with + | Let (tid, Call (funcName, args), body) -> + // Check if this is a regular call (not tail call) to a user function + match Map.tryFind funcName funcs with + | Some info when shouldInline info config depth -> + // Inline the call + let (inlinedExpr, varGen') = inlineCall info args tid body varGen + // Recursively inline in the result (with increased depth) + let (result, varGen'', _) = inlineInExpr funcs config (depth + 1) varGen' inlinedExpr + (result, varGen'', true) + | _ -> + // Don't inline - continue processing body + let (body', varGen', changed) = inlineInExpr funcs config depth varGen body + (Let (tid, Call (funcName, args), body'), varGen', changed) + + | Let (tid, cexpr, body) -> + // Not a call, just process the body + let (body', varGen', changed) = inlineInExpr funcs config depth varGen body + (Let (tid, cexpr, body'), varGen', changed) + + | Return atom -> + (Return atom, varGen, false) + + | If (cond, thenBranch, elseBranch) -> + let (thenBranch', varGen', changed1) = inlineInExpr funcs config depth varGen thenBranch + let (elseBranch', varGen'', changed2) = inlineInExpr funcs config depth varGen' elseBranch + (If (cond, thenBranch', elseBranch'), varGen'', changed1 || changed2) + +/// Inline in a function body +let inlineInFunction (funcs: Map) (config: InliningConfig) + (varGen: VarGen) (func: Function) + : Function * VarGen * bool = + let (body', varGen', changed) = inlineInExpr funcs config 0 varGen func.Body + ({ func with Body = body' }, varGen', changed) + +/// Find the maximum TempId used in an expression +let rec maxTempId (expr: AExpr) : int = + match expr with + | Let (TempId n, _, body) -> max n (maxTempId body) + | Return (Var (TempId n)) -> n + | Return _ -> 0 + | If (Var (TempId n), thenBranch, elseBranch) -> + max n (max (maxTempId thenBranch) (maxTempId elseBranch)) + | If (_, thenBranch, elseBranch) -> + max (maxTempId thenBranch) (maxTempId elseBranch) + +/// Find the maximum TempId in a function +let maxTempIdInFunction (func: Function) : int = + let paramMax = func.TypedParams |> List.map (fun p -> let (TempId n) = p.Id in n) |> List.fold max 0 + max paramMax (maxTempId func.Body) + +/// Find the maximum TempId in a program +let maxTempIdInProgram (Program (funcs, main)) : int = + let funcMax = funcs |> List.map maxTempIdInFunction |> List.fold max 0 + max funcMax (maxTempId main) + +// ============================================================================ +// Phase 4: Main entry point +// ============================================================================ + +/// Inline functions in a program +let inlineProgram (config: InliningConfig) (program: Program) : Program = + let (Program (funcs, main)) = program + + // Build function info map (only for user functions, not stdlib) + let funcInfoMap = buildFunctionInfoMap funcs + + // Find starting VarGen value (must be higher than any existing TempId) + let startVarGen = VarGen (maxTempIdInProgram program + 1) + + // Inline in each function (single pass for now) + let (funcs', varGen', _) = + funcs + |> List.fold (fun (accFuncs, varGen, anyChanged) func -> + let (func', varGen', changed) = inlineInFunction funcInfoMap config varGen func + (func' :: accFuncs, varGen', anyChanged || changed) + ) ([], startVarGen, false) + + // Inline in main expression + let (main', _, _) = inlineInExpr funcInfoMap config 0 varGen' main + + Program (List.rev funcs', main') + +/// Inline functions with default configuration +let inlineProgramDefault (program: Program) : Program = + inlineProgram defaultConfig program diff --git a/backend/src/LibCompiler/passes/2.5_RefCountInsertion.fs b/backend/src/LibCompiler/passes/2.5_RefCountInsertion.fs new file mode 100644 index 0000000000..f2b018bee4 --- /dev/null +++ b/backend/src/LibCompiler/passes/2.5_RefCountInsertion.fs @@ -0,0 +1,1012 @@ +// 2.5_RefCountInsertion.fs - Reference Count Insertion Pass +// +// Inserts RefCountInc and RefCountDec operations into ANF. +// +// Design decisions: +// - Borrowed calling convention: callers retain ownership, callees borrow +// - Decrement when heap values go out of scope (end of Let body) +// - Don't decrement returned values (ownership transfers to caller) +// - Increment when extracting heap values from tuples (they become shared) +// +// The pass uses type inference from the conversion result to determine +// which TempIds hold heap-allocated values. +// +// Heap types (reference counted): Tuples, Records, Sum types, Lists, Dicts, Strings +// Stack types (NOT RC'd): Integers, Booleans, Float64, RawPtr +// +// See docs/features/reference-counting.md for detailed documentation. + +module RefCountInsertion + +open ANF +open AST_to_ANF + +/// Type context for inferring types during RC insertion +type TypeContext = { + TypeReg: TypeRegistry + VariantLookup: VariantLookup + FuncReg: FunctionRegistry + FuncParams: Map + /// Maps TempId -> Type for values we've seen + TempTypes: Map + /// Maps TempId -> function name for closures (to resolve closure call return types) + ClosureFuncs: Map +} + +/// Cached CExpr type inference results +type CExprTypeCache = Map + +let emptyCExprTypeCache : CExprTypeCache = Map.empty + +/// Create initial context from conversion result +let createContext (result: ConversionResult) : TypeContext = + { TypeReg = result.TypeReg + VariantLookup = result.VariantLookup + FuncReg = result.FuncReg + FuncParams = result.FuncParams + TempTypes = Map.empty + ClosureFuncs = Map.empty } + +let private withTempTypes (ctx: TypeContext) (types: Map) : TypeContext = + { ctx with TempTypes = types } + +/// Add a closure TempId -> function name mapping to context +let addClosureFunc (ctx: TypeContext) (tempId: TempId) (funcName: string) : TypeContext = + { ctx with ClosureFuncs = Map.add tempId funcName ctx.ClosureFuncs } + +/// Try to get the function name of a closure from its TempId +let tryGetClosureFunc (ctx: TypeContext) (atom: Atom) : string option = + match atom with + | Var tid -> Map.tryFind tid ctx.ClosureFuncs + | _ -> None + +/// Try to get the type of a TempId +let tryGetType (ctx: TypeContext) (tempId: TempId) : AST.Type option = + Map.tryFind tempId ctx.TempTypes + +/// Try to get a function's return type from the function registry +let tryGetFuncReturnTypeFromReg (ctx: TypeContext) (funcName: string) : AST.Type option = + match Map.tryFind funcName ctx.FuncReg with + | Some (AST.TFunction (_, retType)) -> Some retType + | Some otherType -> Some otherType + | None -> None + +/// Infer the type of an atom (best-effort) +let inferAtomType (ctx: TypeContext) (atom: Atom) : AST.Type option = + match atom with + | UnitLiteral -> Some AST.TUnit + | IntLiteral n -> Some (ANF.sizedIntToType n) + | BoolLiteral _ -> Some AST.TBool + | StringLiteral _ -> Some AST.TString + | FloatLiteral _ -> Some AST.TFloat64 + | Var tid -> tryGetType ctx tid + | FuncRef funcName -> Map.tryFind funcName ctx.FuncReg + +let private isIntegerType (typ: AST.Type) : bool = + match typ with + | AST.TInt8 | AST.TInt16 | AST.TInt32 | AST.TInt64 + | AST.TUInt8 | AST.TUInt16 | AST.TUInt32 | AST.TUInt64 -> true + | _ -> false + +let private inferArithmeticType (leftType: AST.Type option) (rightType: AST.Type option) : AST.Type option = + match leftType, rightType with + | Some AST.TFloat64, _ + | _, Some AST.TFloat64 -> + Some AST.TFloat64 + | Some left, Some right when left = right && isIntegerType left -> + Some left + | Some left, None when isIntegerType left -> + Some left + | None, Some right when isIntegerType right -> + Some right + | _ -> + None + +let private isHeapLikeForBitwiseTagging (typ: AST.Type) : bool = + match typ with + | AST.TTuple _ + | AST.TRecord _ + | AST.TSum _ + | AST.TList _ + | AST.TDict _ -> + true + | _ -> + false + +/// Return types for monomorphized intrinsics that are not always present in FuncReg +let private tryGetMonomorphizedIntrinsicReturnType (funcName: string) : AST.Type option = + if funcName.StartsWith("__raw_get_") then Some AST.TInt64 + elif funcName.StartsWith("__raw_set_") then Some AST.TUnit + elif funcName.StartsWith("__hash_") then Some AST.TInt64 + elif funcName.StartsWith("__key_eq_") then Some AST.TBool + elif funcName.StartsWith("__empty_dict_") then Some AST.TInt64 + elif funcName.StartsWith("__dict_is_null_") then Some AST.TBool + elif funcName.StartsWith("__dict_get_tag_") then Some AST.TInt64 + elif funcName.StartsWith("__dict_to_rawptr_") then Some AST.TInt64 + elif funcName.StartsWith("__rawptr_to_dict_") then Some AST.TInt64 + elif funcName.StartsWith("__list_is_null_") then Some AST.TBool + elif funcName.StartsWith("__list_get_tag_") then Some AST.TInt64 + elif funcName.StartsWith("__list_to_rawptr_") then Some AST.TInt64 + else None + +/// Infer the type of a CExpr in the given context +let inferCExprType (ctx: TypeContext) (cexpr: CExpr) : AST.Type option = + match cexpr with + | Atom (UnitLiteral) -> Some AST.TUnit + | Atom (IntLiteral n) -> Some (ANF.sizedIntToType n) + | Atom (BoolLiteral _) -> Some AST.TBool + | Atom (StringLiteral _) -> Some AST.TString + | Atom (FloatLiteral _) -> Some AST.TFloat64 + | Atom (Var tid) -> tryGetType ctx tid + | Atom (FuncRef funcName) -> Map.tryFind funcName ctx.FuncReg + | TypedAtom (_, typ) -> Some typ // Use the explicit type annotation + | Prim (op, left, right) -> + // Binary ops return int or bool depending on op + match op with + | Add | Sub | Mul | Div -> + let leftType = inferAtomType ctx left + let rightType = inferAtomType ctx right + inferArithmeticType leftType rightType + | Mod | Shl | Shr -> + let leftType = inferAtomType ctx left + let rightType = inferAtomType ctx right + match leftType, rightType with + | Some l, Some r when l = r && isIntegerType l -> Some l + | Some l, None when isIntegerType l -> Some l + | None, Some r when isIntegerType r -> Some r + | Some l, Some _ -> Some l + | Some l, None -> Some l + | None, Some r -> Some r + | None, None -> None + | BitAnd | BitOr | BitXor -> + let leftType = inferAtomType ctx left + let rightType = inferAtomType ctx right + match leftType, rightType with + // Pointer-tagging lowerings use bitwise ops over tagged heap values and masks. + // The result is a scalar tag/masked pointer value, not a heap object ownership value. + | Some l, _ when isHeapLikeForBitwiseTagging l -> Some AST.TInt64 + | _, Some r when isHeapLikeForBitwiseTagging r -> Some AST.TInt64 + | Some l, Some r when l = r && isIntegerType l -> Some l + | Some l, None when isIntegerType l -> Some l + | None, Some r when isIntegerType r -> Some r + | Some l, Some _ -> Some l + | Some l, None -> Some l + | None, Some r -> Some r + | None, None -> None + | Eq | Neq | Lt | Gt | Lte | Gte | And | Or -> Some AST.TBool + | UnaryPrim (op, atom) -> + match op with + | Neg -> + match inferAtomType ctx atom with + | Some AST.TFloat64 -> Some AST.TFloat64 + | Some _ -> Some AST.TInt64 + | None -> None + | Not -> Some AST.TBool + | BitNot -> + // Preserve the operand type instead of assuming Int64. + // This keeps sized integer semantics (e.g. UInt8) intact. + inferAtomType ctx atom + // Float intrinsics + | FloatSqrt _ -> Some AST.TFloat64 + | FloatAbs _ -> Some AST.TFloat64 + | FloatNeg _ -> Some AST.TFloat64 + | Int64ToFloat _ -> Some AST.TFloat64 + | FloatToInt64 _ -> Some AST.TInt64 + | FloatToBits _ -> Some AST.TUInt64 + | FloatToString _ -> Some AST.TString + | RandomInt64 -> Some AST.TInt64 + | DateNow -> Some AST.TInt64 + | IfValue (_, thenAtom, _) -> + // Type is the type of the branches (should be the same) + match thenAtom with + | Var tid -> tryGetType ctx tid + | UnitLiteral -> Some AST.TUnit + | IntLiteral n -> Some (ANF.sizedIntToType n) + | BoolLiteral _ -> Some AST.TBool + | StringLiteral _ -> Some AST.TString + | FloatLiteral _ -> Some AST.TFloat64 + | FuncRef funcName -> Map.tryFind funcName ctx.FuncReg + | Call (funcName, args) + | BorrowedCall (funcName, args) -> + // Return type from function registry (with special-case inference for stdlib list/tuple helpers) + match funcName, args with + | name, [listAtom; _] when name.StartsWith("Stdlib.List.getAt") || name.StartsWith("Stdlib.__FingerTree.getAt") -> + match tryGetFuncReturnTypeFromReg ctx funcName with + | Some retType -> Some retType + | None -> + match inferAtomType ctx listAtom with + | Some (AST.TList elemType) -> + Some (AST.TSum ("Stdlib.Option.Option", [elemType])) + | _ -> None + | name, [listAtom] when name.StartsWith("Stdlib.List.head") || name.StartsWith("Stdlib.__FingerTree.head") -> + match tryGetFuncReturnTypeFromReg ctx funcName with + | Some retType -> Some retType + | None -> + match inferAtomType ctx listAtom with + | Some (AST.TList elemType) -> + Some (AST.TSum ("Stdlib.Option.Option", [elemType])) + | _ -> None + | name, [listAtom] when name.StartsWith("Stdlib.List.tail") -> + match tryGetFuncReturnTypeFromReg ctx funcName with + | Some retType -> Some retType + | None -> + match inferAtomType ctx listAtom with + | Some (AST.TList elemType) -> + Some (AST.TSum ("Stdlib.Option.Option", [AST.TList elemType])) + | _ -> None + | name, [tupleAtom] when name.StartsWith("Stdlib.Tuple2.first") -> + match tryGetFuncReturnTypeFromReg ctx funcName with + | Some retType -> Some retType + | None -> + match inferAtomType ctx tupleAtom with + | Some (AST.TTuple (firstType :: _)) -> Some firstType + | _ -> None + | name, [tupleAtom] when name.StartsWith("Stdlib.Tuple2.second") -> + match tryGetFuncReturnTypeFromReg ctx funcName with + | Some retType -> Some retType + | None -> + match inferAtomType ctx tupleAtom with + | Some (AST.TTuple (_ :: secondType :: _)) -> Some secondType + | _ -> None + | _ -> + match tryGetFuncReturnTypeFromReg ctx funcName with + | Some t -> Some t + | None -> tryGetMonomorphizedIntrinsicReturnType funcName + | TailCall (funcName, _) -> + // Tail calls have same return type as regular calls + Map.tryFind funcName ctx.FuncReg + | IndirectCall (funcAtom, _) -> + // Look up the function's type to get its return type + match funcAtom with + | Var tid -> + match tryGetType ctx tid with + | Some (AST.TFunction (_, retType)) -> Some retType + | _ -> None + | _ -> None + | IndirectTailCall (funcAtom, _) -> + // Same as IndirectCall + match funcAtom with + | Var tid -> + match tryGetType ctx tid with + | Some (AST.TFunction (_, retType)) -> Some retType + | _ -> None + | _ -> None + | ClosureAlloc (_, captures) -> + // Closure is a tuple-like structure: (func_ptr, cap1, cap2, ...) + // Return a tuple type for ref counting purposes + let captureTypes = captures |> List.map (inferAtomType ctx) + let concreteTypes = + captureTypes + |> List.map (function + | Some typ -> typ + | None -> + Crash.crash "RefCountInsertion: could not infer closure capture types") + Some (AST.TTuple (AST.TInt64 :: concreteTypes)) + | ClosureCall (closureAtom, _) -> + // Try to find the closure's function name and look up return type + match tryGetClosureFunc ctx closureAtom with + | Some funcName -> Map.tryFind funcName ctx.FuncReg + | None -> + // Fallback: infer from closure's type (TFunction) + match closureAtom with + | Var tid -> + match tryGetType ctx tid with + | Some (AST.TFunction (_, retType)) -> Some retType + | _ -> None + | _ -> None + | ClosureTailCall (closureAtom, _) -> + // Same as ClosureCall + match tryGetClosureFunc ctx closureAtom with + | Some funcName -> Map.tryFind funcName ctx.FuncReg + | None -> + match closureAtom with + | Var tid -> + match tryGetType ctx tid with + | Some (AST.TFunction (_, retType)) -> Some retType + | _ -> None + | _ -> None + | TupleAlloc elems -> + // Infer element types and create TTuple + let elemTypes = + elems + |> List.map (function + | UnitLiteral -> AST.TUnit + | IntLiteral n -> ANF.sizedIntToType n + | BoolLiteral _ -> AST.TBool + | StringLiteral _ -> AST.TString + | FloatLiteral _ -> AST.TFloat64 + | Var tid -> + match tryGetType ctx tid with + | Some t -> t + | None -> Crash.crash $"RefCountInsertion: Type not found for temp {tid} in TupleAlloc" + | FuncRef funcName -> + match Map.tryFind funcName ctx.FuncReg with + | Some t -> t + | None -> Crash.crash $"RefCountInsertion: Type not found for function {funcName} in TupleAlloc") + Some (AST.TTuple elemTypes) + | TupleGet (tupleAtom, index) -> + // Get element type from tuple type + match tupleAtom with + | Var tid -> + match tryGetType ctx tid with + | Some (AST.TTuple elemTypes) when index < List.length elemTypes -> + Some (List.item index elemTypes) + | Some (AST.TRecord (typeName, _)) -> + // Record fields - look up field type + match Map.tryFind typeName ctx.TypeReg with + | Some fields when index < List.length fields -> + Some (snd (List.item index fields)) + | _ -> None + | Some (AST.TList elemType) -> + // List Cons cells are (tag, head, tail) - index 1 is head, index 2 is tail + match index with + | 0 -> Some AST.TInt64 // tag + | 1 -> Some elemType // head element + | 2 -> Some (AST.TList elemType) // tail is same list type + | _ -> None + | Some (AST.TSum (_typeName, typeArgs)) -> + // Sum type layout: [tag:8][payload:8] + // index 0 = tag (Int64), index 1 = payload + match index with + | 0 -> Some AST.TInt64 // tag + | 1 -> + // Payload type depends on variant, but for simple cases like Option, + // the payload type is the first type argument + match typeArgs with + | [singleType] -> Some singleType + | _ -> None + | _ -> None + | Some (AST.TFunction _) -> + // Closures are typed as TFunction but laid out as tuples: + // [func_ptr:8][cap1:8][cap2:8]... + // Index 0 is the function pointer (Int64), rest are captures + Some AST.TInt64 // All closure slots are pointer-sized + | _ -> None + | _ -> None + | StringConcat (_, _) -> Some AST.TString // String concatenation returns a string + | RefCountInc (_, _, _) -> Some AST.TUnit + | RefCountDec (_, _, _) -> Some AST.TUnit + | Print (_, valueType) -> Some valueType // Print returns the type it prints + | FileReadText _ -> Some (AST.TSum ("Stdlib.Result.Result", [AST.TString; AST.TString])) // Result + | FileExists _ -> Some AST.TBool // Bool + | FileWriteText _ -> Some (AST.TSum ("Stdlib.Result.Result", [AST.TUnit; AST.TString])) // Result + | FileAppendText _ -> Some (AST.TSum ("Stdlib.Result.Result", [AST.TUnit; AST.TString])) // Result + | FileDelete _ -> Some (AST.TSum ("Stdlib.Result.Result", [AST.TUnit; AST.TString])) // Result + | FileSetExecutable _ -> Some (AST.TSum ("Stdlib.Result.Result", [AST.TUnit; AST.TString])) // Result + | FileWriteFromPtr _ -> Some AST.TBool // Returns Bool (success/failure) + // Raw memory intrinsics (no ref counting - manually managed) + | RawAlloc _ -> Some AST.TRawPtr // Returns raw pointer + | RawFree _ -> Some AST.TUnit // Returns unit + | RawGet (_, _, valueType) -> valueType + | RawGetByte _ -> Some AST.TInt64 // Returns 1-byte value (zero-extended) + | RawSet _ -> Some AST.TUnit // Returns unit + | RawSetByte _ -> Some AST.TUnit // Returns unit + // String refcount intrinsics + | RefCountIncString _ -> Some AST.TUnit // Returns unit + | RefCountDecString _ -> Some AST.TUnit // Returns unit + | RuntimeError _ -> Some AST.TUnit + +/// Return analysis annotation for AExpr nodes +type ReturnAnnotatedExpr = + | RReturn of Atom * Set + | RLet of TempId * CExpr * ReturnAnnotatedExpr * Set + | RIf of Atom * ReturnAnnotatedExpr * ReturnAnnotatedExpr * Set + +/// Get the set of returned TempIds for a return-annotated expression +let returnedSet (expr: ReturnAnnotatedExpr) : Set = + match expr with + | RReturn (_, returned) -> returned + | RLet (_, _, _, returned) -> returned + | RIf (_, _, _, returned) -> returned + +/// Collect the alias chain for a TempId (includes the TempId itself) +let rec collectAliasChain (aliases: Map) (tempId: TempId) : Set = + match Map.tryFind tempId aliases with + | Some nextId -> Set.add tempId (collectAliasChain aliases nextId) + | None -> Set.singleton tempId + +/// Analyze return values and track alias chains in a single pass +let rec analyzeReturns + (aliases: Map) + (expr: AExpr) + : ReturnAnnotatedExpr = + match expr with + | Return atom -> + let returned = + match atom with + | Var tid -> collectAliasChain aliases tid + | _ -> Set.empty + RReturn (atom, returned) + | Let (tempId, cexpr, body) -> + let aliases' = + match cexpr with + | Atom (Var sourceId) -> Map.add tempId sourceId aliases + | _ -> aliases + let bodyInfo = analyzeReturns aliases' body + RLet (tempId, cexpr, bodyInfo, returnedSet bodyInfo) + | If (cond, thenBranch, elseBranch) -> + let thenInfo = analyzeReturns aliases thenBranch + let elseInfo = analyzeReturns aliases elseBranch + let returned = Set.union (returnedSet thenInfo) (returnedSet elseInfo) + RIf (cond, thenInfo, elseInfo, returned) + +/// Check if a CExpr is a borrowing/aliasing operation +/// Borrowed/aliased values should NOT get their own RefCountDec - the original value owns the memory +let isBorrowingExpr (cexpr: CExpr) : bool = + match cexpr with + | IfValue _ -> true // Selects one of two existing values; no ownership transfer + | TupleGet _ -> true // Extracts pointer from tuple/list - borrowed from parent + | RawGet _ -> true // RawGet reads existing memory; it does not transfer ownership + | Atom (Var _) -> true // Alias/copy of existing variable - don't double-dec + | TypedAtom (Var _, _) -> true // TypedAtom wrapping a variable - also borrowed + | _ -> false + +let private isRcManagedHeapType (typ: AST.Type) : bool = + // Dict values are tagged pointers; generic RefCountInc/Dec expect raw pointers. + match typ with + | AST.TDict _ -> false + | _ -> isHeapType typ + +let private rcInfoForType (ctx: TypeContext) (typ: AST.Type) : int * RcKind = + (payloadSize typ ctx.TypeReg, rcKind typ) +/// Insert RefCountInc for returned parameters at a Return node +let insertParamIncsAtReturn + (paramIncs: (TempId * int * RcKind) list) + (returned: Set) + (expr: AExpr) + (varGen: VarGen) + (types: Map) + : AExpr * VarGen * Map = + let active = + paramIncs + |> List.filter (fun (tempId, _, _) -> Set.contains tempId returned) + List.foldBack + (fun (tempId, size, kind) (accExpr, accVarGen, accTypes) -> + let (dummyId, varGen') = freshVar accVarGen + let incExpr = RefCountInc (Var tempId, size, kind) + let accExpr' = Let (dummyId, incExpr, accExpr) + (accExpr', varGen', Map.add dummyId AST.TUnit accTypes)) + active + (expr, varGen, types) + +/// Insert RefCountDec operations before a Return using the current dec stack +let insertReturnDecs + (returnDecs: (TempId * int * RcKind) list) + (expr: AExpr) + (varGen: VarGen) + (types: Map) + : AExpr * VarGen * Map = + let decsInOrder = List.rev returnDecs + List.fold + (fun (accExpr, accVarGen, accTypes) (tempId, size, kind) -> + let (dummyId, varGen') = freshVar accVarGen + let decExpr = RefCountDec (Var tempId, size, kind) + let accExpr' = Let (dummyId, decExpr, accExpr) + (accExpr', varGen', Map.add dummyId AST.TUnit accTypes)) + (expr, varGen, types) + decsInOrder + +/// Stored state for rebuilding a Let while unwinding an expression spine +type LetFrame = { + TempId: TempId + CExpr: CExpr + TupleIncTargets: (TempId * int * RcKind) list + ReturnInc: (int * RcKind) option +} + +/// Apply a single Let frame around an expression (uses current varGen/types) +let applyLetFrame + (frame: LetFrame) + (expr: AExpr, varGen: VarGen, types: Map) + : AExpr * VarGen * Map = + let (incBindingsRev, varGen1) = + frame.TupleIncTargets + |> List.fold (fun (acc, vg) (tid, size, kind) -> + let (dummyId, vg') = freshVar vg + ((dummyId, RefCountInc (Var tid, size, kind)) :: acc, vg')) ([], varGen) + let incBindings = List.rev incBindingsRev + + let typesWithIncs = + incBindings + |> List.fold (fun m (tid, _) -> Map.add tid AST.TUnit m) types + + let (returnIncBinding, varGen2, typesWithReturnInc) = + match frame.ReturnInc with + | Some (size, kind) -> + let (incId, vg) = freshVar varGen1 + let incExpr = RefCountInc (Var frame.TempId, size, kind) + ([(incId, incExpr)], vg, Map.add incId AST.TUnit typesWithIncs) + | None -> + ([], varGen1, typesWithIncs) + + let bodyWithReturnInc = wrapBindings returnIncBinding expr + let letExpr = Let (frame.TempId, frame.CExpr, bodyWithReturnInc) + let exprWithIncs = wrapBindings incBindings letExpr + (exprWithIncs, varGen2, typesWithReturnInc) + +/// Apply a stack of Let frames (innermost-first) +let applyLetFrames + (frames: LetFrame list) + (expr: AExpr, varGen: VarGen, types: Map) + : AExpr * VarGen * Map = + let folder + ((accExpr, accVarGen, accTypes): AExpr * VarGen * Map) + (frame: LetFrame) + : AExpr * VarGen * Map = + applyLetFrame frame (accExpr, accVarGen, accTypes) + List.fold folder (expr, varGen, types) frames + +let private tailCallArgTempIds (cexpr: CExpr) : Set = + let fromAtom (atom: Atom) : Set = + match atom with + | Var tid -> Set.singleton tid + | _ -> Set.empty + match cexpr with + | TailCall (_, args) -> + args |> List.fold (fun acc atom -> Set.union acc (fromAtom atom)) Set.empty + | IndirectTailCall (func, args) -> + (fromAtom func, args) + ||> List.fold (fun acc atom -> Set.union acc (fromAtom atom)) + | ClosureTailCall (closure, args) -> + (fromAtom closure, args) + ||> List.fold (fun acc atom -> Set.union acc (fromAtom atom)) + | _ -> + Set.empty + +let rec private collectMovableTailDecPrefix + (tailArgTemps: Set) + (expr: AExpr) + : (TempId * CExpr) list * AExpr = + match expr with + | Let (tmpId, RefCountDec (Var tid, size, kind), rest) when not (Set.contains tid tailArgTemps) -> + let (bindings, remaining) = collectMovableTailDecPrefix tailArgTemps rest + ((tmpId, RefCountDec (Var tid, size, kind)) :: bindings, remaining) + | Let (tmpId, RefCountDecString atom, rest) -> + let overlaps = + match atom with + | Var tid -> Set.contains tid tailArgTemps + | _ -> false + if overlaps then + ([], expr) + else + let (bindings, remaining) = collectMovableTailDecPrefix tailArgTemps rest + ((tmpId, RefCountDecString atom) :: bindings, remaining) + | _ -> + ([], expr) + +let rec private moveDecsBeforeNonSelfTailCalls (currentFuncName: string) (expr: AExpr) : AExpr = + match expr with + | Return _ -> + expr + | If (cond, thenBranch, elseBranch) -> + If ( + cond, + moveDecsBeforeNonSelfTailCalls currentFuncName thenBranch, + moveDecsBeforeNonSelfTailCalls currentFuncName elseBranch + ) + | Let (tempId, cexpr, body) -> + let body' = moveDecsBeforeNonSelfTailCalls currentFuncName body + match cexpr with + | TailCall (targetFunc, _) when targetFunc <> currentFuncName -> + let tailArgTemps = tailCallArgTempIds cexpr + let (movableDecs, remainingBody) = collectMovableTailDecPrefix tailArgTemps body' + let tailLet = Let (tempId, cexpr, remainingBody) + wrapBindings movableDecs tailLet + | _ -> + Let (tempId, cexpr, body') + +/// Insert reference counting operations using return analysis and a dec stack +/// Returns (transformed expr, varGen, types defined in this subtree) +let rec insertRCWithAnalysis + (ctx: TypeContext) + (currentFuncName: string option) + (expr: ReturnAnnotatedExpr) + (varGen: VarGen) + (returnDecs: (TempId * int * RcKind) list) + (paramIncs: (TempId * int * RcKind) list) + (types: Map) + (typeCache: CExprTypeCache) + : AExpr * VarGen * Map * CExprTypeCache = + let ctxWithTypes = withTempTypes ctx types + let rec descend + (ctx: TypeContext) + (expr: ReturnAnnotatedExpr) + (varGen: VarGen) + (returnDecs: (TempId * int * RcKind) list) + (frames: LetFrame list) + (types: Map) + (typeCache: CExprTypeCache) + : AExpr * VarGen * Map * CExprTypeCache = + match expr with + | RReturn (atom, returned) -> + let baseExpr = Return atom + let (withParamIncs, varGen1, types1) = + insertParamIncsAtReturn paramIncs returned baseExpr varGen types + let (withDecs, varGen2, types2) = insertReturnDecs returnDecs withParamIncs varGen1 types1 + let (finalExpr, finalVarGen, finalTypes) = applyLetFrames frames (withDecs, varGen2, types2) + (finalExpr, finalVarGen, finalTypes, typeCache) + + | RIf (cond, thenBranch, elseBranch, _) -> + let (thenBranch', varGen1, types1, typeCache1) = + insertRCWithAnalysis ctx currentFuncName thenBranch varGen returnDecs paramIncs types typeCache + let (elseBranch', varGen2, types2, typeCache2) = + insertRCWithAnalysis ctx currentFuncName elseBranch varGen1 returnDecs paramIncs types1 typeCache1 + let (finalExpr, finalVarGen, finalTypes) = + applyLetFrames frames (If (cond, thenBranch', elseBranch'), varGen2, types2) + (finalExpr, finalVarGen, finalTypes, typeCache2) + + | RLet (tempId, cexpr, bodyInfo, _) -> + let (TempId tempIdInt) = tempId + + // First, infer the type of this binding and add to context + let (maybeType, typeCache1) = + match Map.tryFind cexpr typeCache with + | Some cached -> (cached, typeCache) + | None -> + let inferred = inferCExprType ctx cexpr + (inferred, Map.add cexpr inferred typeCache) + + // When a temp is aliased through one or more let-bound vars, infer its type + // from the first concrete use-site (typically a call argument position). + let rec inferAliasedVarTypeFromUse (aliasedTemp: TempId) (nextBody: ReturnAnnotatedExpr) : AST.Type option = + let inferFromCall (funcName: string) (args: Atom list) : AST.Type option = + match Map.tryFind funcName ctx.FuncReg with + | Some (AST.TFunction (paramTypes, _)) -> + args + |> List.mapi (fun idx atom -> (idx, atom)) + |> List.tryPick (fun (idx, atom) -> + match atom with + | Var tid when tid = aliasedTemp && idx < List.length paramTypes -> + Some (List.item idx paramTypes) + | _ -> + None) + | _ -> + None + + match nextBody with + | RLet (_, Call (funcName, args), _, _) -> + inferFromCall funcName args + | RLet (_, BorrowedCall (funcName, args), _, _) -> + inferFromCall funcName args + | RLet (_, TailCall (funcName, args), _, _) -> + inferFromCall funcName args + | RLet (nextAliasTemp, Atom (Var sourceId), nextNextBody, _) when sourceId = aliasedTemp -> + inferAliasedVarTypeFromUse nextAliasTemp nextNextBody + | RLet (nextAliasTemp, TypedAtom (Var sourceId, aliasType), nextNextBody, _) when sourceId = aliasedTemp -> + if isRcManagedHeapType aliasType then + Some aliasType + else + inferAliasedVarTypeFromUse nextAliasTemp nextNextBody + | RIf (Var tid, _, _, _) when tid = aliasedTemp -> + Some AST.TBool + | _ -> + None + + // Use a TypedAtom alias in the body to preserve the intended payload type + // when TupleGet cannot infer it from a multi-parameter sum. + let inferredType = + match maybeType with + | Some t -> + let aliasTypeFromBody = + match bodyInfo with + | RLet (_, TypedAtom (Var sourceId, aliasType), _, _) when sourceId = tempId -> + Some aliasType + | RLet (aliasTemp, Atom (Var sourceId), nextBody, _) when sourceId = tempId -> + inferAliasedVarTypeFromUse aliasTemp nextBody + | _ -> + None + + match aliasTypeFromBody with + | Some inferredAliasType when isRcManagedHeapType inferredAliasType && not (isRcManagedHeapType t) -> + inferredAliasType + | _ -> + t + | None -> + match cexpr, bodyInfo with + | TupleGet _, RLet (_, TypedAtom (Var sourceId, aliasType), _, _) when sourceId = tempId -> + aliasType + | RawGet (_, _, None), RLet (_, TypedAtom (Var sourceId, aliasType), _, _) when sourceId = tempId -> + // RawGet without an explicit type is often immediately re-typed via TypedAtom. + // Preserve that alias type instead of guessing Int64. + aliasType + | RawGet (_, _, None), RLet (aliasTemp, Atom (Var sourceId), nextBody, _) when sourceId = tempId -> + match inferAliasedVarTypeFromUse aliasTemp nextBody with + | Some inferredAliasType -> + inferredAliasType + | None -> + // Keep unresolved rather than guessing Int64. + AST.TVar $"raw_get_{tempIdInt}" + | RawGet (_, _, None), _ -> + // Unknown RawGet payload type: preserve as unresolved type variable. + AST.TVar $"raw_get_{tempIdInt}" + | _ -> + // Preserve unresolved type information instead of defaulting to Int64. + AST.TVar $"inferred_{tempIdInt}" + + let typesWithBinding = + match cexpr with + | TypedAtom (Var sourceId, aliasType) -> + types |> Map.add tempId inferredType |> Map.add sourceId aliasType + | _ -> + Map.add tempId inferredType types + + let ctxWithTypes = withTempTypes ctx typesWithBinding + + // Track closure function names for later ClosureCall type resolution + let ctx'' = + match cexpr with + | ClosureAlloc (funcName, _) -> addClosureFunc ctxWithTypes tempId funcName + | _ -> ctxWithTypes + + let bodyReturned = returnedSet bodyInfo + let consumedByImmediateI64Push = + let isI64Push (funcName: string) : bool = + funcName = "Stdlib.__FingerTree.push_i64" + || funcName = "Stdlib.__FingerTree.pushBack_i64" + let consumesSecondArg (args: Atom list) : bool = + match args with + | _listAtom :: Var valueTemp :: _ -> valueTemp = tempId + | _ -> false + match bodyInfo with + | RLet (_, Call (funcName, args), _, _) + | RLet (_, TailCall (funcName, args), _, _) -> + isI64Push funcName && consumesSecondArg args + | _ -> + false + let returnDecs' = + let secondParamNeedsOwnershipTransfer (funcName: string) : bool = + let isOwnershipTransferredParamType (typ: AST.Type) : bool = + isRcManagedHeapType typ + || match typ with + | AST.TFunction _ -> true + | _ -> false + match Map.tryFind funcName ctx.FuncReg with + | Some (AST.TFunction (paramTypes, _)) -> + match paramTypes with + | _ :: secondParamType :: _ -> isOwnershipTransferredParamType secondParamType + | _ -> false + | _ -> + false + let skipReturnDecForPushBackHelpers = + match currentFuncName with + | Some funcName -> + let isFunctionSpecialization = funcName.Contains("_fn_") + let isPushBackFamily = + funcName = "Stdlib.List.pushBack" + || funcName.StartsWith("Stdlib.List.pushBack_") + || funcName = "Stdlib.__FingerTree.pushBack" + || funcName.StartsWith("Stdlib.__FingerTree.pushBack_") + || funcName = "Stdlib.__FingerTree.__pushBackNode" + || funcName.StartsWith("Stdlib.__FingerTree.__pushBackNode_") + || funcName.StartsWith("Stdlib.List.__mapHelper_") + isPushBackFamily + && isFunctionSpecialization + && secondParamNeedsOwnershipTransfer funcName + && match inferredType with + | AST.TList _ -> true + | _ -> false + | None -> + false + if isRcManagedHeapType inferredType + && not (Set.contains tempId bodyReturned) + && not (isBorrowingExpr cexpr) + && not skipReturnDecForPushBackHelpers + && not consumedByImmediateI64Push then + let (size, kind) = rcInfoForType ctx inferredType + (tempId, size, kind) :: returnDecs + else + returnDecs + + let tupleIncTargets = + match cexpr with + | TupleAlloc elems -> + elems + |> List.fold (fun acc atom -> + match atom with + | Var tid -> + match tryGetType ctx tid with + | Some t when isRcManagedHeapType t -> + let (size, kind) = rcInfoForType ctx t + (tid, size, kind) :: acc + | _ -> acc + | _ -> acc + ) [] + |> List.rev + | _ -> [] + + let returnInc = + let rcInfoFromAtom (atom: Atom) : (int * RcKind) option = + match atom with + | Var tid -> + match tryGetType ctx tid with + | Some t when isRcManagedHeapType t -> Some (rcInfoForType ctx t) + | _ -> None + | _ -> None + + match cexpr with + | IfValue (_, thenAtom, elseAtom) -> + // IfValue selects one of two existing heap values. + // Materialize ownership on the selected temp before source temps are decref'd. + match rcInfoFromAtom thenAtom, rcInfoFromAtom elseAtom with + | Some info, _ -> Some info + | None, Some info -> Some info + | None, None -> None + | Atom (Var sourceId) + | TypedAtom (Var sourceId, _) -> + // Returning a pure alias of an already-returned owned value should not inc again. + if isRcManagedHeapType inferredType + && Set.contains tempId bodyReturned + && isBorrowingExpr cexpr then + if Set.contains sourceId bodyReturned then + None + else + Some (rcInfoForType ctx inferredType) + else + None + | _ -> + if isRcManagedHeapType inferredType + && Set.contains tempId bodyReturned + && isBorrowingExpr cexpr then + Some (rcInfoForType ctx inferredType) + else + None + + let frame = { + TempId = tempId + CExpr = cexpr + TupleIncTargets = tupleIncTargets + ReturnInc = returnInc + } + + // Process the body iteratively, then rebuild on the way back out + descend ctx'' bodyInfo varGen returnDecs' (frame :: frames) typesWithBinding typeCache1 + + descend ctxWithTypes expr varGen returnDecs [] types typeCache + +/// Insert reference counting operations into an AExpr +/// Returns (transformed expr, varGen, accumulated TempTypes) +let private insertRCInternal + (ctx: TypeContext) + (expr: AExpr) + (varGen: VarGen) + (types: Map) + (typeCache: CExprTypeCache) + : AExpr * VarGen * Map * CExprTypeCache = + let ctxWithTypes = withTempTypes ctx types + let analyzed = analyzeReturns Map.empty expr + let (expr', varGen', types', typeCache') = + insertRCWithAnalysis ctxWithTypes None analyzed varGen [] [] types typeCache + (expr', varGen', types', typeCache') + +/// Insert reference counting operations into an AExpr +/// Returns (transformed expr, varGen, accumulated TempTypes) +let insertRC (ctx: TypeContext) (expr: AExpr) (varGen: VarGen) : AExpr * VarGen * Map = + let (expr', varGen', types', _typeCache) = + insertRCInternal ctx expr varGen Map.empty emptyCExprTypeCache + (expr', varGen', types') + +/// Insert RC operations into a function +/// Returns (transformed function, varGen, accumulated TempTypes) +let private insertRCInFunctionInternal + (ctx: TypeContext) + (func: Function) + (varGen: VarGen) + (types: Map) + (typeCache: CExprTypeCache) + : Function * VarGen * Map * CExprTypeCache = + let typesWithParams = + func.TypedParams + |> List.fold (fun m tp -> Map.add tp.Id tp.Type m) types + let ctxWithParams = withTempTypes ctx typesWithParams + + let bodyInfo = analyzeReturns Map.empty func.Body + let paramIncsRev = + func.TypedParams + |> List.fold (fun acc param -> + match param.Type with + | _ when isRcManagedHeapType param.Type -> + let (size, kind) = rcInfoForType ctxWithParams param.Type + (param.Id, size, kind) :: acc + | _ -> acc + ) [] + let paramIncs = List.rev paramIncsRev + + // Process function body with return analysis + let (bodyWithRC, varGen', accTypes, typeCache') = + insertRCWithAnalysis ctxWithParams (Some func.Name) bodyInfo varGen [] paramIncs typesWithParams typeCache + let body' = moveDecsBeforeNonSelfTailCalls func.Name bodyWithRC + ({ func with Body = body' }, varGen', accTypes, typeCache') + +/// Insert RC operations into a function +/// Returns (transformed function, varGen, accumulated TempTypes) +let insertRCInFunction (ctx: TypeContext) (func: Function) (varGen: VarGen) : Function * VarGen * Map = + let (func', varGen', types', _typeCache) = + insertRCInFunctionInternal ctx func varGen Map.empty emptyCExprTypeCache + (func', varGen', types') + +// ============================================================================ +// TypeMap Completeness Verification +// ============================================================================ + +let private isTempMissing (typeMap: ANF.TypeMap) (tempId: TempId) : bool = + not (Map.containsKey tempId typeMap) + +let rec collectMissingTempIdsInExpr + (typeMap: ANF.TypeMap) + (expr: AExpr) + (acc: TempId list) + : TempId list = + match expr with + | Return _ -> acc + | Let (tempId, _, body) -> + let acc' = if isTempMissing typeMap tempId then tempId :: acc else acc + collectMissingTempIdsInExpr typeMap body acc' + | If (_, thenBranch, elseBranch) -> + let acc' = collectMissingTempIdsInExpr typeMap thenBranch acc + collectMissingTempIdsInExpr typeMap elseBranch acc' + +let collectMissingTempIdsInFunction + (typeMap: ANF.TypeMap) + (func: Function) + (acc: TempId list) + : TempId list = + let acc' = + func.TypedParams + |> List.fold (fun acc tp -> if isTempMissing typeMap tp.Id then tp.Id :: acc else acc) acc + collectMissingTempIdsInExpr typeMap func.Body acc' + +/// Verify that all defined TempIds have types in the TypeMap +/// Returns a list of TempIds that are missing from the TypeMap +let verifyTypeMapCompleteness (program: ANF.Program) (typeMap: ANF.TypeMap) : TempId list = + let (ANF.Program (functions, mainExpr)) = program + let missing = + functions + |> List.fold (fun acc func -> collectMissingTempIdsInFunction typeMap func acc) [] + |> collectMissingTempIdsInExpr typeMap mainExpr + List.rev missing + +/// Insert RC operations into a program +/// Returns (ANF.Program, TypeMap) where TypeMap contains all TempId -> Type mappings +let private insertRCInProgramInternal + (result: ConversionResult) + : Result = + let ctx = createContext result + let (ANF.Program (functions, mainExpr)) = result.Program + let varGen = VarGen 1000 // Start high to avoid conflicts + + // Process all functions, accumulating types + let rec processFuncs + (funcs: Function list) + (vg: VarGen) + (accFuncs: Function list) + (accTypes: Map) + : Function list * VarGen * Map = + match funcs with + | [] -> (List.rev accFuncs, vg, accTypes) + | f :: rest -> + // Cache keys use TempIds from the current function body, so sharing + // across functions can reuse stale types for unrelated TempIds. + let (f', vg', types, _typeCache) = + insertRCInFunctionInternal ctx f vg accTypes emptyCExprTypeCache + processFuncs rest vg' (f' :: accFuncs) types + + let (functions', varGen1, typesFromFuncs) = + processFuncs functions varGen [] Map.empty + + // Process main expression + let (mainExpr', _, finalTypeMap, _typeCache) = + insertRCInternal ctx mainExpr varGen1 typesFromFuncs emptyCExprTypeCache + + // Verify TypeMap completeness - all defined TempIds should have types + let program' = ANF.Program (functions', mainExpr') + let missingTypes = verifyTypeMapCompleteness program' finalTypeMap + if not (List.isEmpty missingTypes) then + let missingStr = missingTypes |> List.map (fun (TempId n) -> $"t{n}") |> String.concat ", " + Crash.crash $"RefCountInsertion: TypeMap incomplete - missing types for: {missingStr}" + + Ok (program', finalTypeMap) + +/// Insert RC operations into a program +/// Returns (ANF.Program, TypeMap) where TypeMap contains all TempId -> Type mappings +let insertRCInProgram (result: ConversionResult) : Result = + insertRCInProgramInternal result diff --git a/backend/src/LibCompiler/passes/2.6_PrintInsertion.fs b/backend/src/LibCompiler/passes/2.6_PrintInsertion.fs new file mode 100644 index 0000000000..4236eba369 --- /dev/null +++ b/backend/src/LibCompiler/passes/2.6_PrintInsertion.fs @@ -0,0 +1,114 @@ +// 2.6_PrintInsertion.fs - Print Insertion Pass +// +// Inserts a Print instruction at the end of the main expression. +// This ensures the program's result is printed before exiting. +// +// This pass runs after RC insertion and before ANF-to-MIR conversion. + +module PrintInsertion + +open ANF + +/// Get the toDisplayString function name for list element type +let getListDisplayStringFunc (elemType: AST.Type) : string option = + match elemType with + | AST.TInt64 -> Some "Stdlib.List.toDisplayString_i64" + | AST.TBool -> Some "Stdlib.List.toDisplayString_bool" + | AST.TString -> Some "Stdlib.List.toDisplayString_str" + | AST.TFloat64 -> Some "Stdlib.List.toDisplayString_f64" + | _ -> None + +/// Wrap the return value with a Print instruction +/// Transforms: Return atom → Let (_, Print (atom, type), Return atom) +/// For list types, generates: Call toDisplayString, then Print the string +let rec wrapReturnWithPrint (programType: AST.Type) (varGen: VarGen) (expr: AExpr) : AExpr * VarGen = + let defaultPrintType = + match programType with + // Builtin.testRuntimeError has a bottom-like compile-time type. + // Printing should stay concrete so downstream passes never see it. + | AST.TRuntimeError -> AST.TUnit + | _ -> programType + + match expr with + | Return atom -> + // Dead-code elimination can reduce a typed expression branch to `()` + // (for example, `Builtin.testRuntimeError` in a selected match arm). + // Printing must follow the runtime atom shape, not only the original program type. + let printType = + match atom with + | ANF.UnitLiteral -> AST.TUnit + | _ -> defaultPrintType + + // For list types, call toDisplayString first + match printType with + | AST.TSum ("Stdlib.Option.Option", [AST.TList elemType]) -> + match getListDisplayStringFunc elemType with + | Some toDisplayStringName -> + // Keep the display helper reachable so tree shaking doesn't drop it. + let (keepFunc, varGen1) = freshVar varGen + let (printTmp, varGen2) = freshVar varGen1 + let keepExpr = Atom (FuncRef toDisplayStringName) + let printExpr = Print (atom, printType) + (Let (keepFunc, keepExpr, Let (printTmp, printExpr, Return atom)), varGen2) + | None -> + // Unsupported element type, fall back to simple print + let (printTmp, varGen') = freshVar varGen + (Let (printTmp, Print (atom, printType), Return atom), varGen') + | AST.TList elemType -> + match getListDisplayStringFunc elemType with + | Some toDisplayStringName -> + // Generate: let strTmp = Call(toDisplayString, [list]) in + // let _ = Print(strTmp, String) in Return atom + let (strTmp, varGen1) = freshVar varGen + let (printTmp, varGen2) = freshVar varGen1 + let callExpr = Call (toDisplayStringName, [atom]) + let printExpr = Print (Var strTmp, AST.TString) + (Let (strTmp, callExpr, Let (printTmp, printExpr, Return atom)), varGen2) + | None -> + // Unsupported element type, fall back to simple print + let (printTmp, varGen') = freshVar varGen + (Let (printTmp, Print (atom, printType), Return atom), varGen') + | AST.TFloat64 -> + // For Float64, call Float.toString first, then print the string + let (strTmp, varGen1) = freshVar varGen + let (printTmp, varGen2) = freshVar varGen1 + let callExpr = Call ("Stdlib.Float.toString", [atom]) + let printExpr = Print (Var strTmp, AST.TString) + (Let (strTmp, callExpr, Let (printTmp, printExpr, Return atom)), varGen2) + | _ -> + // Non-list types: simple print + let (printTmp, varGen') = freshVar varGen + (Let (printTmp, Print (atom, printType), Return atom), varGen') + | Let (tempId, cexpr, body) -> + // Recurse into body + let (body', varGen') = wrapReturnWithPrint programType varGen body + (Let (tempId, cexpr, body'), varGen') + | If (cond, thenBranch, elseBranch) -> + // Wrap both branches + let (thenBranch', varGen1) = wrapReturnWithPrint programType varGen thenBranch + let (elseBranch', varGen2) = wrapReturnWithPrint programType varGen1 elseBranch + (If (cond, thenBranch', elseBranch'), varGen2) + +/// Insert Print at the end of the main expression +let insertPrint (functions: ANF.Function list) (mainExpr: ANF.AExpr) (programType: AST.Type) : ANF.Program = + let varGen = VarGen 2000 // Start high to avoid conflicts + let (exprWithPrint, _) = wrapReturnWithPrint programType varGen mainExpr + ANF.Program (functions, exprWithPrint) + +/// Insert Print into a named entry function +let insertPrintInEntry (entryName: string) (programType: AST.Type) (functions: ANF.Function list) : Result = + let varGen = VarGen 2000 // Start high to avoid conflicts + let rec update found remaining = + match remaining with + | [] -> + if found then Ok [] + else Error $"Entry function '{entryName}' not found for print insertion" + | f :: rest -> + if f.Name = entryName then + let (bodyWithPrint, _) = wrapReturnWithPrint programType varGen f.Body + update true rest + |> Result.map (fun updatedTail -> { f with Body = bodyWithPrint } :: updatedTail) + else + update found rest + |> Result.map (fun updatedTail -> f :: updatedTail) + update false functions diff --git a/backend/src/LibCompiler/passes/2.7_TailCallDetection.fs b/backend/src/LibCompiler/passes/2.7_TailCallDetection.fs new file mode 100644 index 0000000000..1c49910729 --- /dev/null +++ b/backend/src/LibCompiler/passes/2.7_TailCallDetection.fs @@ -0,0 +1,217 @@ +// 2.7_TailCallDetection.fs - Tail Call Detection Pass +// +// Detects tail calls in ANF and transforms them to tail call variants: +// - Call → TailCall +// - IndirectCall → IndirectTailCall +// - ClosureCall → ClosureTailCall +// +// A call is in tail position if: +// - It's in a Let binding where the body eventually returns the same variable +// - Both branches of an If are in tail position if the If itself is +// +// This runs AFTER RefCountInsertion, so RefCountDec operations may be inserted +// between the call and the return. We look through any RefCountDec operations +// to find the final Return. This is crucial because without TCO, functions like +// __reverseHelper would use regular calls instead of tail calls, causing the +// intermediate cons cells to be freed prematurely (leading to corrupted results +// when the free list reuses those cells for subsequent allocations). +// +// CURRENT STATUS: TCO is ENABLED. The DCE bug that caused 197 test failures +// has been fixed (DeadCodeElimination.fs was not recognizing TailCall as a +// function call, causing stdlib functions called via tail call to be removed). +// +// See docs/features/tail-call-optimization.md for detailed documentation. + +module TailCallDetection + +open ANF + +/// Check if a CExpr is a RefCountDec operation +let isRefCountDec (cexpr: CExpr) : bool = + match cexpr with + | RefCountDec _ -> true + | RefCountDecString _ -> true + | _ -> false + +/// Check if an expression eventually returns a specific TempId +/// Looks through any RefCountDec operations to find the final Return +let rec isReturnOf (tempId: TempId) (expr: AExpr) : bool = + match expr with + | Return (Var tid) when tid = tempId -> true + | Let (_, cexpr, body) when isRefCountDec cexpr -> + // RefCountDec followed by more expressions - look through it + isReturnOf tempId body + | _ -> false + +/// Transform a Call to TailCall if it's in tail position +let convertToTailCall (cexpr: CExpr) : CExpr = + match cexpr with + | Call (funcName, args) -> TailCall (funcName, args) + | BorrowedCall (funcName, args) -> TailCall (funcName, args) + | IndirectCall (func, args) -> IndirectTailCall (func, args) + | ClosureCall (closure, args) -> ClosureTailCall (closure, args) + | _ -> cexpr + +let private wrapBindings (bindings: (TempId * CExpr) list) (body: AExpr) : AExpr = + List.foldBack (fun (tempId, cexpr) acc -> Let (tempId, cexpr, acc)) bindings body + +let rec private resolveAliasRoot + (aliasRoots: Map) + (tempId: TempId) + (visited: Set) + : TempId = + if Set.contains tempId visited then + tempId + else + match Map.tryFind tempId aliasRoots with + | Some next when next <> tempId -> + resolveAliasRoot aliasRoots next (Set.add tempId visited) + | _ -> + tempId + +let private canonicalTempId (aliasRoots: Map) (tempId: TempId) : TempId = + resolveAliasRoot aliasRoots tempId Set.empty + +let private extendAliasRoots + (aliasRoots: Map) + (tempId: TempId) + (cexpr: CExpr) + : Map = + let sourceAlias = + match cexpr with + | Atom (Var tid) -> Some tid + | TypedAtom (Var tid, _) -> Some tid + | _ -> None + + match sourceAlias with + | Some sourceTid -> + Map.add tempId (canonicalTempId aliasRoots sourceTid) aliasRoots + | None -> + aliasRoots + +let private tailCallArgTempIds + (aliasRoots: Map) + (cexpr: CExpr) + : Set = + let fromAtom (atom: Atom) : Set = + match atom with + | Var tid -> Set.singleton (canonicalTempId aliasRoots tid) + | _ -> Set.empty + match cexpr with + | TailCall (_, args) -> + args |> List.fold (fun acc atom -> Set.union acc (fromAtom atom)) Set.empty + | IndirectTailCall (func, args) -> + (fromAtom func, args) + ||> List.fold (fun acc atom -> Set.union acc (fromAtom atom)) + | ClosureTailCall (closure, args) -> + (fromAtom closure, args) + ||> List.fold (fun acc atom -> Set.union acc (fromAtom atom)) + | _ -> + Set.empty + +let rec private collectMovableDecPrefix + (aliasRoots: Map) + (tailArgTemps: Set) + (expr: AExpr) + : (TempId * CExpr) list * AExpr = + match expr with + | Let (tmpId, RefCountDec (Var tid, size, kind), rest) + when not (Set.contains (canonicalTempId aliasRoots tid) tailArgTemps) -> + let (bindings, remaining) = collectMovableDecPrefix aliasRoots tailArgTemps rest + ((tmpId, RefCountDec (Var tid, size, kind)) :: bindings, remaining) + | Let (tmpId, RefCountDecString atom, rest) -> + let overlaps = + match atom with + | Var tid -> Set.contains (canonicalTempId aliasRoots tid) tailArgTemps + | _ -> false + if overlaps then + ([], expr) + else + let (bindings, remaining) = collectMovableDecPrefix aliasRoots tailArgTemps rest + ((tmpId, RefCountDecString atom) :: bindings, remaining) + | _ -> + ([], expr) + +let private isDirectReturnOf (tempId: TempId) (expr: AExpr) : bool = + match expr with + | Return (Var tid) when tid = tempId -> true + | _ -> false + +/// Check if a CExpr is a call (direct, indirect, or closure) +let isCallExpr (cexpr: CExpr) : bool = + match cexpr with + | Call _ | BorrowedCall _ | IndirectCall _ | ClosureCall _ -> true + | _ -> false + +/// Detect and transform tail calls in an expression. +/// The 'inTailPosition' parameter indicates if the current expression +/// is in tail position (its result is directly returned). +let rec detectTailCalls + (currentFuncName: string) + (inTailPosition: bool) + (aliasRoots: Map) + (expr: AExpr) + : AExpr = + match expr with + | Return atom -> + // Return is always a base case - just return it + Return atom + + | Let (tempId, cexpr, body) -> + // Check if this is a tail call pattern: + // Let (t, Call(...), Return (Var t)) + if inTailPosition && isCallExpr cexpr && isReturnOf tempId body then + // This is a tail call! Convert the call to tail call variant + let tailCall = convertToTailCall cexpr + match tailCall with + | TailCall (targetFunc, _) when targetFunc <> currentFuncName -> + // For non-self tailcalls, execute movable cleanup decs before the tailcall. + // Any dec left after a tailcall would be unreachable. + let tailArgTemps = tailCallArgTempIds aliasRoots tailCall + let (movableDecs, remainingBody) = collectMovableDecPrefix aliasRoots tailArgTemps body + if isDirectReturnOf tempId remainingBody then + wrapBindings movableDecs (Let (tempId, tailCall, remainingBody)) + else + // Cleanup remains after the call (typically overlap with a tail argument), + // so keep a normal call to preserve the post-call unwind work. + let aliasRoots' = extendAliasRoots aliasRoots tempId cexpr + let body' = detectTailCalls currentFuncName inTailPosition aliasRoots' body + Let (tempId, cexpr, body') + | TailCall (targetFunc, _) when targetFunc = currentFuncName -> + // Self-tailcall lowering currently cannot preserve cleanup decrefs that overlap + // tail arguments (the decref is required on unwind). Keep these as normal calls. + let tailArgTemps = tailCallArgTempIds aliasRoots tailCall + let (movableDecs, remainingBody) = collectMovableDecPrefix aliasRoots tailArgTemps body + if isDirectReturnOf tempId remainingBody then + wrapBindings movableDecs (Let (tempId, tailCall, remainingBody)) + else + let aliasRoots' = extendAliasRoots aliasRoots tempId cexpr + let body' = detectTailCalls currentFuncName inTailPosition aliasRoots' body + Let (tempId, cexpr, body') + | _ -> + Let (tempId, tailCall, body) + else + // Not a tail call - recurse into body + // Body is in tail position if current expression is + let aliasRoots' = extendAliasRoots aliasRoots tempId cexpr + let body' = detectTailCalls currentFuncName inTailPosition aliasRoots' body + Let (tempId, cexpr, body') + + | If (cond, thenBranch, elseBranch) -> + // If expression: both branches are in tail position if If is + let thenBranch' = detectTailCalls currentFuncName inTailPosition aliasRoots thenBranch + let elseBranch' = detectTailCalls currentFuncName inTailPosition aliasRoots elseBranch + If (cond, thenBranch', elseBranch') + +/// Detect tail calls in a function +let detectTailCallsInFunction (func: Function) : Function = + // Function body is always in tail position + let body' = detectTailCalls func.Name true Map.empty func.Body + { func with Body = body' } + +/// Detect tail calls in a program +let detectTailCallsInProgram (program: ANF.Program) : ANF.Program = + // TCO is ENABLED - the DCE bug that caused 197 test failures has been fixed + // (DeadCodeElimination.fs was not recognizing TailCall as a function call) + let (ANF.Program (functions, main)) = program + ANF.Program (functions |> List.map detectTailCallsInFunction, main) diff --git a/backend/src/LibCompiler/passes/2_AST_to_ANF.fs b/backend/src/LibCompiler/passes/2_AST_to_ANF.fs new file mode 100644 index 0000000000..39ddd562a8 --- /dev/null +++ b/backend/src/LibCompiler/passes/2_AST_to_ANF.fs @@ -0,0 +1,8804 @@ +// 2_AST_to_ANF.fs - ANF Transformation (Pass 2) +// +// Transforms AST into A-Normal Form (ANF). +// +// Algorithm: +// - Recursively processes nested expressions +// - Converts complex operands to atoms (literals or variables) +// - Introduces let-bindings for intermediate computations +// - Uses VarGen for generating fresh temporary variable names +// +// Example: +// BinOp(Add, Int64Literal(2), BinOp(Mul, Int64Literal(3), Int64Literal(4))) +// → +// let tmp0 = 3; let tmp1 = 4; let tmp2 = tmp0 * tmp1; +// let tmp3 = 2; let tmp4 = tmp3 + tmp2; return tmp4 + +module AST_to_ANF + +open ANF +open Output + +let private int128ToCanonicalString (value: System.Int128) : string = + value.ToString(System.Globalization.CultureInfo.InvariantCulture) + +let private uint128ToCanonicalString (value: System.UInt128) : string = + value.ToString(System.Globalization.CultureInfo.InvariantCulture) + +/// Convert AST.Type to a string for specialization keys +let rec typeToString (ty: AST.Type) : string = + match ty with + | AST.TInt64 -> "i64" + | AST.TInt128 -> "i128" + | AST.TInt32 -> "i32" + | AST.TInt16 -> "i16" + | AST.TInt8 -> "i8" + | AST.TUInt64 -> "u64" + | AST.TUInt128 -> "u128" + | AST.TUInt32 -> "u32" + | AST.TUInt16 -> "u16" + | AST.TUInt8 -> "u8" + | AST.TBool -> "bool" + | AST.TString -> "str" + | AST.TBytes -> "bytes" + | AST.TChar -> "char" + | AST.TFloat64 -> "f64" + | AST.TUnit -> "unit" + | AST.TRuntimeError -> "runtime_error" + | AST.TRawPtr -> "ptr" + | AST.TVar name -> name + | AST.TRecord (name, args) -> name + (if List.isEmpty args then "" else "<" + (args |> List.map typeToString |> String.concat ",") + ">") + | AST.TSum (name, args) -> name + "<" + (args |> List.map typeToString |> String.concat ",") + ">" + | AST.TList elemType -> "List<" + typeToString elemType + ">" + | AST.TDict (keyType, valueType) -> "Dict<" + typeToString keyType + "," + typeToString valueType + ">" + | AST.TFunction (paramTypes, retType) -> + "(" + (paramTypes |> List.map typeToString |> String.concat ",") + ")->" + typeToString retType + | AST.TTuple types -> "(" + (types |> List.map typeToString |> String.concat "*") + ")" + +/// Convert a literal pattern into an ANF sized integer +let patternLiteralToSizedInt (pattern: AST.Pattern) : ANF.SizedInt option = + match pattern with + | AST.PInt64 n -> Some (ANF.Int64 n) + | AST.PInt8Literal n -> Some (ANF.Int8 n) + | AST.PInt16Literal n -> Some (ANF.Int16 n) + | AST.PInt32Literal n -> Some (ANF.Int32 n) + | AST.PUInt8Literal n -> Some (ANF.UInt8 n) + | AST.PUInt16Literal n -> Some (ANF.UInt16 n) + | AST.PUInt32Literal n -> Some (ANF.UInt32 n) + | AST.PUInt64Literal n -> Some (ANF.UInt64 n) + | _ -> None + +/// Try to convert a function call to a file I/O intrinsic CExpr +/// Returns Some CExpr if it's a file intrinsic, None otherwise +let tryFileIntrinsic (funcName: string) (args: ANF.Atom list) : ANF.CExpr option = + match funcName, args with + | "Stdlib.File.readText", [pathAtom] -> + Some (ANF.FileReadText pathAtom) + | "Stdlib.File.exists", [pathAtom] -> + Some (ANF.FileExists pathAtom) + | "Stdlib.File.writeText", [pathAtom; contentAtom] -> + Some (ANF.FileWriteText (pathAtom, contentAtom)) + | "Stdlib.File.appendText", [pathAtom; contentAtom] -> + Some (ANF.FileAppendText (pathAtom, contentAtom)) + | "Stdlib.File.delete", [pathAtom] -> + Some (ANF.FileDelete pathAtom) + | "Stdlib.File.setExecutable", [pathAtom] -> + Some (ANF.FileSetExecutable pathAtom) + | "Stdlib.File.writeFromPtr", [pathAtom; ptrAtom; lengthAtom] -> + Some (ANF.FileWriteFromPtr (pathAtom, ptrAtom, lengthAtom)) + | _ -> None + +let private normalizeNullaryIntrinsicArgs (args: ANF.Atom list) : ANF.Atom list = + match args with + | [ANF.UnitLiteral] -> [] + | _ -> args + +/// Parse mangled type names used by monomorphized raw intrinsics. +/// This is duplicated early in the file so raw-intrinsic lowering can recover value types. +let private tryParseMangledTypeForRawIntrinsic + (variantLookup: Map) + (mangled: string) + : AST.Type option = + let tokens = mangled.Split('_') |> Array.toList + let sumTypeNames = + variantLookup + |> Map.toList + |> List.map (fun (_, (typeName, _, _, _)) -> typeName) + |> Set.ofList + + let mkNamedType (name: string) (args: AST.Type list) : AST.Type = + if Set.contains name sumTypeNames then AST.TSum (name, args) else AST.TRecord (name, args) + + let tryPrimitive (tok: string) : AST.Type option = + match tok with + | "i8" -> Some AST.TInt8 + | "i16" -> Some AST.TInt16 + | "i32" -> Some AST.TInt32 + | "i64" -> Some AST.TInt64 + | "i128" -> Some AST.TInt128 + | "u8" -> Some AST.TUInt8 + | "u16" -> Some AST.TUInt16 + | "u32" -> Some AST.TUInt32 + | "u64" -> Some AST.TUInt64 + | "u128" -> Some AST.TUInt128 + | "bool" -> Some AST.TBool + | "f64" -> Some AST.TFloat64 + | "str" -> Some AST.TString + | "bytes" -> Some AST.TBytes + | "char" -> Some AST.TChar + | "unit" -> Some AST.TUnit + | "rawptr" -> Some AST.TRawPtr + | _ -> None + + let rec parseType (toks: string list) : (AST.Type * string list) list = + match toks with + | [] -> [] + | tok :: rest -> + match tok with + | "list" -> + parseType rest |> List.map (fun (elemT, rem) -> (AST.TList elemT, rem)) + | "dict" -> + parseType rest + |> List.collect (fun (keyT, rem1) -> + parseType rem1 |> List.map (fun (valueT, rem2) -> (AST.TDict (keyT, valueT), rem2))) + | "tup" -> + parseTupleElems rest |> List.map (fun (elems, rem) -> (AST.TTuple elems, rem)) + | "fn" -> + parseFunction rest + | _ -> + match tryPrimitive tok with + | Some prim -> [ (prim, rest) ] + | None -> + let baseType = (mkNamedType tok [], rest) + let withArgs = + parseTupleElems rest + |> List.map (fun (args, rem) -> (mkNamedType tok args, rem)) + baseType :: withArgs + + and parseTupleElems (toks: string list) : (AST.Type list * string list) list = + parseType toks + |> List.collect (fun (firstT, rem1) -> + let single = ([firstT], rem1) + let more = + parseTupleElems rem1 + |> List.map (fun (restTs, rem2) -> (firstT :: restTs, rem2)) + single :: more) + + and parseFunction (toks: string list) : (AST.Type * string list) list = + let rec splitParams (acc: string list) (remaining: string list) = + match remaining with + | [] -> None + | "to" :: rest -> Some (List.rev acc, rest) + | tok :: rest -> splitParams (tok :: acc) rest + match splitParams [] toks with + | None -> [] + | Some (paramTokens, retTokens) -> + let paramParses = + parseTupleElems paramTokens + |> List.filter (fun (_, rem) -> rem = []) + |> List.map fst + let retParses = + parseType retTokens + |> List.filter (fun (_, rem) -> rem = []) + |> List.map fst + paramParses + |> List.collect (fun paramTypes -> + retParses |> List.map (fun ret -> (AST.TFunction (paramTypes, ret), []))) + + match parseType tokens |> List.filter (fun (_, rem) -> rem = []) with + | [ (typ, _) ] -> Some typ + | _ -> None + +/// Try to convert a function call to a Float intrinsic CExpr +/// Returns Some CExpr if it's a Float intrinsic, None otherwise +let tryFloatIntrinsic (funcName: string) (args: ANF.Atom list) : ANF.CExpr option = + match funcName, args with + | "Stdlib.Float.sqrt", [xAtom] -> + Some (ANF.FloatSqrt xAtom) + | "Stdlib.Float.abs", [xAtom] -> + Some (ANF.FloatAbs xAtom) + | "Stdlib.Float.negate", [xAtom] -> + Some (ANF.FloatNeg xAtom) + | "Stdlib.Float.toInt", [xAtom] -> + Some (ANF.FloatToInt64 xAtom) + | "Stdlib.Int64.toFloat", [xAtom] -> + Some (ANF.Int64ToFloat xAtom) + // NOTE: Float.toString is now implemented in Dark, not as an intrinsic + | "Stdlib.Float.toBits", [xAtom] -> + Some (ANF.FloatToBits xAtom) + | _ -> None + +/// Try to constant-fold platform/path intrinsics at compile time +/// Returns Some CExpr if it's a constant-foldable intrinsic, None otherwise +let tryConstantFoldIntrinsic (funcName: string) (args: ANF.Atom list) : ANF.CExpr option = + let args = normalizeNullaryIntrinsicArgs args + match funcName, args with + | "Stdlib.Platform.isMacOS", [] -> + // Constant-fold based on target platform using .NET runtime detection + let isMac = System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform( + System.Runtime.InteropServices.OSPlatform.OSX) + Some (ANF.Atom (ANF.BoolLiteral isMac)) + | "Stdlib.Platform.isLinux", [] -> + let isLinux = System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform( + System.Runtime.InteropServices.OSPlatform.Linux) + Some (ANF.Atom (ANF.BoolLiteral isLinux)) + | "Stdlib.Path.tempDir", [] -> + // Both macOS and Linux use /tmp + Some (ANF.Atom (ANF.StringLiteral "/tmp")) + | _ -> None + +/// Try to convert a function call to a raw memory intrinsic CExpr +/// These are internal-only functions for implementing HAMT data structures +/// Returns Some CExpr if it's a raw memory intrinsic, None otherwise +/// Note: __raw_get and __raw_set are generic and become monomorphized names like +/// __raw_get_i64, __raw_get_str, __raw_set_i64, etc. +let tryRawMemoryIntrinsic + (variantLookup: Map) + (funcName: string) + (args: ANF.Atom list) + : ANF.CExpr option = + let args = normalizeNullaryIntrinsicArgs args + let tryMonomorphizedValueType (prefix: string) (name: string) : AST.Type option = + if name = prefix then + None + elif name.StartsWith(prefix + "_") then + let mangled = name.Substring(prefix.Length + 1) + tryParseMangledTypeForRawIntrinsic variantLookup mangled + else + None + match funcName, args with + | "__raw_alloc", [numBytesAtom] -> + Some (ANF.RawAlloc numBytesAtom) + | "__raw_free", [ptrAtom] -> + Some (ANF.RawFree ptrAtom) + | "__raw_get_byte", [ptrAtom; offsetAtom] -> + // Read single byte at offset, returns Int64 (zero-extended) + // IMPORTANT: Must come before the generic __raw_get_* pattern + Some (ANF.RawGetByte (ptrAtom, offsetAtom)) + | name, [ptrAtom; offsetAtom] when name = "__raw_get" || name.StartsWith("__raw_get_") -> + // Generic __raw_get monomorphizes to __raw_get_. + // Preserve recovered value type so downstream RC/codegen can handle heap payloads correctly. + let valueType = tryMonomorphizedValueType "__raw_get" name + Some (ANF.RawGet (ptrAtom, offsetAtom, valueType)) + | "__raw_set_byte", [ptrAtom; offsetAtom; valueAtom] -> + // Write single byte at offset + // IMPORTANT: Must come before the generic __raw_set_* pattern + Some (ANF.RawSetByte (ptrAtom, offsetAtom, valueAtom)) + | name, [ptrAtom; offsetAtom; valueAtom] when name = "__raw_set" || name.StartsWith("__raw_set_") -> + // Generic __raw_set monomorphizes to __raw_set_. + // Preserve recovered value type so codegen can update ownership for stored heap values. + let valueType = tryMonomorphizedValueType "__raw_set" name + Some (ANF.RawSet (ptrAtom, offsetAtom, valueAtom, valueType)) + // Cast operations are no-ops at runtime - just pass through the value + | "__rawptr_to_int64", [ptrAtom] -> + Some (ANF.Atom ptrAtom) + | "__int64_to_rawptr", [intAtom] -> + Some (ANF.Atom intAtom) + // String refcount intrinsics (for Dict with string keys) + | "__refcount_inc_string", [strAtom] -> + Some (ANF.RefCountIncString strAtom) + | "__refcount_dec_string", [strAtom] -> + Some (ANF.RefCountDecString strAtom) + // String pointer cast operations are no-ops at runtime - just pass through the value + | "__string_to_int64", [strAtom] -> + Some (ANF.Atom strAtom) + | "__int64_to_string", [intAtom] -> + Some (ANF.Atom intAtom) + + // Bytes pointer cast operations are no-ops at runtime - just pass through the value + | "__bytes_to_int64", [bytesAtom] -> + Some (ANF.Atom bytesAtom) + | "__int64_to_bytes", [intAtom] -> + Some (ANF.Atom intAtom) + + // Dict intrinsics - for type-safe Dict operations + // __empty_dict returns 0 (null pointer) + | name, [] when name = "__empty_dict" || name.StartsWith("__empty_dict_") -> + Some (ANF.Atom (ANF.IntLiteral (ANF.Int64 0L))) + // __dict_is_null checks if pointer is 0 + | name, [dictAtom] when name = "__dict_is_null" || name.StartsWith("__dict_is_null_") -> + Some (ANF.Prim (ANF.Eq, dictAtom, ANF.IntLiteral (ANF.Int64 0L))) + // __dict_get_tag extracts low 2 bits (dict & 3) + | name, [dictAtom] when name = "__dict_get_tag" || name.StartsWith("__dict_get_tag_") -> + Some (ANF.Prim (ANF.BitAnd, dictAtom, ANF.IntLiteral (ANF.Int64 3L))) + // __dict_to_rawptr clears tag bits (dict & -4) + | name, [dictAtom] when name = "__dict_to_rawptr" || name.StartsWith("__dict_to_rawptr_") -> + Some (ANF.Prim (ANF.BitAnd, dictAtom, ANF.IntLiteral (ANF.Int64 -4L))) + // __rawptr_to_dict combines pointer + tag (ptr | tag) + | name, [ptrAtom; tagAtom] when name = "__rawptr_to_dict" || name.StartsWith("__rawptr_to_dict_") -> + Some (ANF.Prim (ANF.BitOr, ptrAtom, tagAtom)) + + // List intrinsics - for Finger Tree implementation + // __list_is_null checks if list pointer is 0 (empty) + | name, [listAtom] when name = "__list_is_null" || name.StartsWith("__list_is_null_") -> + Some (ANF.Prim (ANF.Eq, listAtom, ANF.IntLiteral (ANF.Int64 0L))) + // __list_get_tag extracts low 3 bits (list & 7) for Finger Tree tags (0-4) + | name, [listAtom] when name = "__list_get_tag" || name.StartsWith("__list_get_tag_") -> + Some (ANF.Prim (ANF.BitAnd, listAtom, ANF.IntLiteral (ANF.Int64 7L))) + // __list_to_rawptr clears tag bits (list & -8) to get raw pointer + | name, [listAtom] when name = "__list_to_rawptr" || name.StartsWith("__list_to_rawptr_") -> + Some (ANF.Prim (ANF.BitAnd, listAtom, ANF.IntLiteral (ANF.Int64 -8L))) + // __rawptr_to_list combines pointer + tag (ptr | tag) to create tagged list + | name, [ptrAtom; tagAtom] when name = "__rawptr_to_list" || name.StartsWith("__rawptr_to_list_") -> + Some (ANF.Prim (ANF.BitOr, ptrAtom, tagAtom)) + // __list_empty returns 0 (null pointer = empty finger tree) + | name, [] when name = "__list_empty" || name.StartsWith("__list_empty_") -> + Some (ANF.Atom (ANF.IntLiteral (ANF.Int64 0L))) + + | _ -> None + +/// Try to convert a function call to a random intrinsic CExpr +/// Returns Some CExpr if it's a random intrinsic, None otherwise +let tryRandomIntrinsic (funcName: string) (args: ANF.Atom list) : ANF.CExpr option = + let args = normalizeNullaryIntrinsicArgs args + match funcName, args with + | "Stdlib.Random.int64", [] -> + Some ANF.RandomInt64 + | _ -> None + +/// Try to convert a function call to a date intrinsic CExpr +/// Returns Some CExpr if it's a date intrinsic, None otherwise +let tryDateIntrinsic (funcName: string) (args: ANF.Atom list) : ANF.CExpr option = + let args = normalizeNullaryIntrinsicArgs args + match funcName, args with + | "Stdlib.Date.now", [] -> + Some ANF.DateNow + | _ -> None + +let isBuiltinUnwrapName (funcName: string) : bool = + funcName = "Builtin.unwrap" || funcName = "Stdlib.Builtin.unwrap" + +let isBuiltinTestRuntimeErrorName (funcName: string) : bool = + funcName = "Builtin.testRuntimeError" || funcName = "Stdlib.Builtin.testRuntimeError" + +let isBuiltinTestNanName (name: string) : bool = + name = "Builtin.testNan" || name = "Stdlib.Builtin.testNan" + +/// Try to look up a name in a map, with fallback to Stdlib prefix. +/// Returns both the value and resolved name. +let private tryLookupWithFallback (name: string) (m: Map) : ('a * string) option = + match Map.tryFind name m with + | Some v -> Some (v, name) + | None -> + if name.Contains(".") && not (name.StartsWith("Stdlib.")) then + let resolvedName = "Stdlib." + name + match Map.tryFind resolvedName m with + | Some v -> Some (v, resolvedName) + | None -> None + else + None + +let private unwrapErrorPayloadToString (expr: AST.Expr) : string option = + match expr with + | AST.UnitLiteral -> Some "()" + | AST.Int64Literal n -> Some $"{n}" + | AST.Int128Literal n -> Some (int128ToCanonicalString n) + | AST.Int8Literal n -> Some $"{n}" + | AST.Int16Literal n -> Some $"{n}" + | AST.Int32Literal n -> Some $"{n}" + | AST.UInt8Literal n -> Some $"{n}" + | AST.UInt16Literal n -> Some $"{n}" + | AST.UInt32Literal n -> Some $"{n}" + | AST.UInt64Literal n -> Some $"{n}" + | AST.UInt128Literal n -> Some (uint128ToCanonicalString n) + | AST.BoolLiteral true -> Some "true" + | AST.BoolLiteral false -> Some "false" + | AST.FloatLiteral f -> Some $"{f}" + | AST.StringLiteral s -> Some s + | AST.CharLiteral s -> Some s + | _ -> None + +/// Type registry - maps record type names to their field definitions +type TypeRegistry = Map + +/// Variant lookup - maps variant names to (type name, type params, tag index, payload type) +type VariantLookup = Map + +/// Function registry - maps function names to their FULL function types (TFunction) +type FunctionRegistry = Map + +/// Alias registry - maps type alias names to their type params and target types +/// For simple record aliases: "Vec" -> ([], TRecord "Point") +type AliasRegistry = Map + +/// Resolve a type name through the alias registry +/// If the name is an alias for a record type, returns the resolved record name +/// Otherwise returns the original name +let rec resolveRecordTypeName (aliasReg: AliasRegistry) (typeName: string) : string = + match Map.tryFind typeName aliasReg with + | Some ([], AST.TRecord (targetName, _)) -> resolveRecordTypeName aliasReg targetName + | Some ([], AST.TSum (targetName, _)) -> resolveRecordTypeName aliasReg targetName + | _ -> typeName + +/// Expand a type registry to include alias entries +/// If "Vec" aliases to "Point" and "Point" has fields [x, y], then "Vec" also gets [x, y] +let expandTypeRegWithAliases (typeReg: TypeRegistry) (aliasReg: AliasRegistry) : TypeRegistry = + aliasReg + |> Map.fold (fun accReg aliasName (typeParams, targetType) -> + match typeParams, targetType with + | [], AST.TRecord (targetName, _) -> + let resolvedName = resolveRecordTypeName aliasReg targetName + match Map.tryFind resolvedName typeReg with + | Some fields -> Map.add aliasName fields accReg + | None -> accReg // Target not found, skip + | _ -> accReg // Not a non-generic record alias, skip + ) typeReg + +/// Variable environment - maps variable names to their TempIds and types +/// The type information is used for type-directed field lookup in record access +type VarEnv = Map + +/// Extract just the type environment from VarEnv for use with inferType +let typeEnvFromVarEnv (varEnv: VarEnv) : Map = + varEnv |> Map.map (fun _ (_, t) -> t) + +// ============================================================================ +// Monomorphization Support for Generic Functions +// ============================================================================ +// +// The Dark compiler uses monomorphization to handle generics - each generic +// function instantiation becomes a separate specialized function with a +// mangled name (e.g., identity → identity_i64). +// +// Algorithm: +// 1. Collect all generic function definitions (functions with TypeParams) +// 2. Scan for TypeApp expressions (calls to generic functions with type args) +// 3. For each unique (funcName, [typeArgs]) pair: +// - Substitute type parameters with concrete types in the function body +// - Generate a specialized function with mangled name +// 4. Replace all TypeApp calls with regular Calls to mangled names +// 5. Iterate until fixed-point (new specializations may contain more TypeApps) +// +// Key design decisions: +// - No runtime type info: all types resolved at compile time +// - Name mangling encodes types: identity_i64, swap_str_bool +// - Iterative: handles nested generics like List> +// +// See docs/features/generics.md for detailed documentation. +// ============================================================================ + +/// Generic function registry - maps generic function names to their definitions +type GenericFuncDefs = Map + +/// Specialization key - a generic function instantiated with specific types +type SpecKey = string * AST.Type list // (funcName, typeArgs) + +/// Specialization registry - tracks which specializations are needed +/// Maps (funcName, typeArgs) -> specialized name +type SpecRegistry = Map + +/// Result of specializing generic functions from a spec set +type SpecializationResult = { + SpecializedFuncs: AST.FunctionDef list + SpecRegistry: SpecRegistry + ExternalSpecs: Set +} + +/// Extract generic function definitions (functions with type parameters) +/// from a program. Used for on-demand monomorphization of stdlib generics. +let extractGenericFuncDefs (program: AST.Program) : GenericFuncDefs = + let (AST.Program topLevels) = program + topLevels + |> List.choose (function + | AST.FunctionDef f when not (List.isEmpty f.TypeParams) -> Some (f.Name, f) + | _ -> None) + |> Map.ofList + +/// Convert a type to a string for name mangling +let rec typeToMangledName (t: AST.Type) : string = + match t with + | AST.TInt8 -> "i8" + | AST.TInt16 -> "i16" + | AST.TInt32 -> "i32" + | AST.TInt64 -> "i64" + | AST.TInt128 -> "i128" + | AST.TUInt8 -> "u8" + | AST.TUInt16 -> "u16" + | AST.TUInt32 -> "u32" + | AST.TUInt64 -> "u64" + | AST.TUInt128 -> "u128" + | AST.TBool -> "bool" + | AST.TFloat64 -> "f64" + | AST.TString -> "str" + | AST.TBytes -> "bytes" + | AST.TChar -> "char" + | AST.TUnit -> "unit" + | AST.TRuntimeError -> "runtime_error" + | AST.TFunction (paramTypes, retType) -> + let paramStr = paramTypes |> List.map typeToMangledName |> String.concat "_" + let retStr = typeToMangledName retType + $"fn_{paramStr}_to_{retStr}" + | AST.TTuple elemTypes -> + let elemsStr = elemTypes |> List.map typeToMangledName |> String.concat "_" + $"tup_{elemsStr}" + | AST.TRecord (name, []) -> name + | AST.TRecord (name, typeArgs) -> + let argsStr = typeArgs |> List.map typeToMangledName |> String.concat "_" + $"{name}_{argsStr}" + | AST.TSum (name, []) -> name + | AST.TSum (name, typeArgs) -> + let argsStr = typeArgs |> List.map typeToMangledName |> String.concat "_" + $"{name}_{argsStr}" + | AST.TList elemType -> $"list_{typeToMangledName elemType}" + | AST.TDict (keyType, valueType) -> $"dict_{typeToMangledName keyType}_{typeToMangledName valueType}" + | AST.TVar name -> name // Should not appear after monomorphization + | AST.TRawPtr -> "rawptr" // Internal raw pointer type + +/// Check if a type contains any type variables +let rec containsTypeVar (t: AST.Type) : bool = + match t with + | AST.TVar _ -> true + | AST.TFunction (paramTypes, retType) -> + List.exists containsTypeVar paramTypes || containsTypeVar retType + | AST.TTuple elemTypes -> List.exists containsTypeVar elemTypes + | AST.TRecord (_, typeArgs) -> List.exists containsTypeVar typeArgs + | AST.TSum (_, typeArgs) -> List.exists containsTypeVar typeArgs + | AST.TList elemType -> containsTypeVar elemType + | AST.TDict (keyType, valueType) -> containsTypeVar keyType || containsTypeVar valueType + | _ -> false + +/// Parse a mangled type name (from typeToMangledName) into an AST type. +/// Returns Error if the mangled form is ambiguous or unsupported. +let tryParseMangledType (variantLookup: VariantLookup) (mangled: string) : Result = + let tokens = mangled.Split('_') |> Array.toList + let sumTypeNames = + variantLookup + |> Map.toList + |> List.map (fun (_, (typeName, _, _, _)) -> typeName) + |> Set.ofList + + let mkNamedType (name: string) (args: AST.Type list) : AST.Type = + if Set.contains name sumTypeNames then AST.TSum (name, args) else AST.TRecord (name, args) + + let tryPrimitive (tok: string) : AST.Type option = + match tok with + | "i8" -> Some AST.TInt8 + | "i16" -> Some AST.TInt16 + | "i32" -> Some AST.TInt32 + | "i64" -> Some AST.TInt64 + | "i128" -> Some AST.TInt128 + | "u8" -> Some AST.TUInt8 + | "u16" -> Some AST.TUInt16 + | "u32" -> Some AST.TUInt32 + | "u64" -> Some AST.TUInt64 + | "u128" -> Some AST.TUInt128 + | "bool" -> Some AST.TBool + | "f64" -> Some AST.TFloat64 + | "str" -> Some AST.TString + | "bytes" -> Some AST.TBytes + | "char" -> Some AST.TChar + | "unit" -> Some AST.TUnit + | "rawptr" -> Some AST.TRawPtr + | _ -> None + + let rec parseType (toks: string list) : (AST.Type * string list) list = + match toks with + | [] -> [] + | tok :: rest -> + match tok with + | "list" -> + parseType rest |> List.map (fun (elemT, rem) -> (AST.TList elemT, rem)) + | "dict" -> + parseType rest + |> List.collect (fun (keyT, rem1) -> + parseType rem1 |> List.map (fun (valueT, rem2) -> (AST.TDict (keyT, valueT), rem2))) + | "tup" -> + parseTupleElems rest |> List.map (fun (elems, rem) -> (AST.TTuple elems, rem)) + | "fn" -> + parseFunction rest + | _ -> + match tryPrimitive tok with + | Some prim -> [ (prim, rest) ] + | None -> + // Parse as named type with optional type arguments. + let baseType = (mkNamedType tok [], rest) + let withArgs = + parseTupleElems rest + |> List.map (fun (args, rem) -> (mkNamedType tok args, rem)) + baseType :: withArgs + + and parseTupleElems (toks: string list) : (AST.Type list * string list) list = + parseType toks + |> List.collect (fun (firstT, rem1) -> + let single = ([firstT], rem1) + let more = + parseTupleElems rem1 + |> List.map (fun (restTs, rem2) -> (firstT :: restTs, rem2)) + single :: more) + + and parseFunction (toks: string list) : (AST.Type * string list) list = + let rec splitParams (acc: string list) (remaining: string list) = + match remaining with + | [] -> None + | "to" :: rest -> Some (List.rev acc, rest) + | tok :: rest -> splitParams (tok :: acc) rest + match splitParams [] toks with + | None -> [] + | Some (paramTokens, retTokens) -> + let paramParses = + parseTupleElems paramTokens + |> List.filter (fun (_, rem) -> rem = []) + |> List.map fst + let retParses = + parseType retTokens + |> List.filter (fun (_, rem) -> rem = []) + |> List.map fst + paramParses + |> List.collect (fun paramTypes -> + retParses |> List.map (fun ret -> (AST.TFunction (paramTypes, ret), []))) + + match parseType tokens |> List.filter (fun (_, rem) -> rem = []) with + | [ (typ, _) ] -> Ok typ + | [] -> Error $"Could not parse mangled type: {mangled}" + | _ -> Error $"Ambiguous mangled type: {mangled}" + +/// Generate a specialized function name +let specName (funcName: string) (typeArgs: AST.Type list) : string = + if List.isEmpty typeArgs then + funcName + else + let typeStr = typeArgs |> List.map typeToMangledName |> String.concat "_" + $"{funcName}_{typeStr}" + +let private isGenericKeyIntrinsicName (funcName: string) : bool = + funcName = "__hash" || funcName = "__key_eq" + +let private exprArgsToList (args: AST.NonEmptyList) : AST.Expr list = + AST.NonEmptyList.toList args + +let private exprArgsFromList (args: AST.Expr list) : AST.NonEmptyList = + match AST.NonEmptyList.tryFromList args with + | Some nonEmptyArgs -> nonEmptyArgs + | None -> AST.NonEmptyList.singleton AST.UnitLiteral + +let private paramsToList (parameters: AST.NonEmptyList) : (string * AST.Type) list = + AST.NonEmptyList.toList parameters + +let private paramsFromList (context: string) (parameters: (string * AST.Type) list) : AST.NonEmptyList = + match AST.NonEmptyList.tryFromList parameters with + | Some nonEmptyParams -> nonEmptyParams + | None -> Crash.crash $"Internal error: {context} produced zero parameters" + +let private syntheticUnitParamPrefix = "$unit" + +let private isSyntheticUnitParam ((paramName, paramType): string * AST.Type) : bool = + paramType = AST.TUnit && paramName.StartsWith(syntheticUnitParamPrefix) + +let private normalizeSyntheticNullaryParams (parameters: (string * AST.Type) list) : (string * AST.Type) list = + match parameters with + | [singleParam] when isSyntheticUnitParam singleParam -> [] + | _ -> parameters + +let private normalizeSyntheticNullaryArgAtoms + (paramTypes: AST.Type list) + (argExprs: AST.Expr list) + (argAtoms: ANF.Atom list) + : ANF.Atom list = + match paramTypes, argExprs, argAtoms with + | [], [AST.UnitLiteral], [_] -> [] + | _ -> argAtoms + +let private unresolvedKeyIntrinsicTypeArgErrorExpr (funcName: string) : AST.Expr = + AST.Call ( + "Builtin.testRuntimeError", + AST.NonEmptyList.singleton (AST.StringLiteral $"Internal error: unresolved type arguments for {funcName}") + ) + +/// Preserve left-to-right argument evaluation before forcing a runtime error. +let private wrapWithIgnoredArgEvaluations (args: AST.Expr list) (body: AST.Expr) : AST.Expr = + args + |> List.indexed + |> List.rev + |> List.fold (fun acc (index, argExpr) -> + AST.Let ($"__dark_internal_unresolved_arg_eval_{index}", argExpr, acc)) body + +/// Type substitution - maps type variable names to concrete types +type Substitution = Map + +/// Apply a substitution to a type, replacing type variables with concrete types +let rec applySubstToType (subst: Substitution) (typ: AST.Type) : AST.Type = + match typ with + | AST.TVar name -> + match Map.tryFind name subst with + | Some concreteType -> concreteType + | None -> typ // Unbound type variable remains as-is + | AST.TFunction (paramTypes, returnType) -> + AST.TFunction (List.map (applySubstToType subst) paramTypes, applySubstToType subst returnType) + | AST.TTuple elemTypes -> + AST.TTuple (List.map (applySubstToType subst) elemTypes) + | AST.TList elemType -> + AST.TList (applySubstToType subst elemType) + | AST.TDict (keyType, valueType) -> + AST.TDict (applySubstToType subst keyType, applySubstToType subst valueType) + | AST.TSum (name, typeArgs) -> + AST.TSum (name, List.map (applySubstToType subst) typeArgs) + | AST.TRecord (name, typeArgs) -> + AST.TRecord (name, List.map (applySubstToType subst) typeArgs) + | AST.TInt8 | AST.TInt16 | AST.TInt32 | AST.TInt64 + | AST.TInt128 + | AST.TUInt8 | AST.TUInt16 | AST.TUInt32 | AST.TUInt64 + | AST.TUInt128 + | AST.TBool | AST.TFloat64 | AST.TString | AST.TBytes | AST.TChar | AST.TUnit | AST.TRuntimeError | AST.TRawPtr -> + typ // Concrete types are unchanged + +/// Collect type variable names in first-seen order. +let rec collectTypeVarsInType (typ: AST.Type) (acc: string list) : string list = + let add name = + if List.contains name acc then acc else acc @ [name] + + match typ with + | AST.TVar name -> add name + | AST.TFunction (paramTypes, returnType) -> + let withParams = paramTypes |> List.fold (fun a t -> collectTypeVarsInType t a) acc + collectTypeVarsInType returnType withParams + | AST.TTuple elemTypes -> + elemTypes |> List.fold (fun a t -> collectTypeVarsInType t a) acc + | AST.TRecord (_, typeArgs) -> + typeArgs |> List.fold (fun a t -> collectTypeVarsInType t a) acc + | AST.TSum (_, typeArgs) -> + typeArgs |> List.fold (fun a t -> collectTypeVarsInType t a) acc + | AST.TList elemType -> + collectTypeVarsInType elemType acc + | AST.TDict (keyType, valueType) -> + let withKey = collectTypeVarsInType keyType acc + collectTypeVarsInType valueType withKey + | AST.TInt8 | AST.TInt16 | AST.TInt32 | AST.TInt64 + | AST.TInt128 + | AST.TUInt8 | AST.TUInt16 | AST.TUInt32 | AST.TUInt64 + | AST.TUInt128 + | AST.TBool | AST.TFloat64 | AST.TString | AST.TBytes | AST.TChar | AST.TUnit | AST.TRuntimeError | AST.TRawPtr -> + acc + +/// Infer record type parameter order from field type variables. +/// This relies on first occurrence order of type variables in field types. +let inferRecordTypeParamsFromFields (fields: (string * AST.Type) list) : string list = + fields |> List.fold (fun acc (_, fieldType) -> collectTypeVarsInType fieldType acc) [] + +/// Build a substitution for generic record fields from concrete type arguments. +let buildRecordFieldSubst (fields: (string * AST.Type) list) (typeArgs: AST.Type list) : Substitution option = + let typeParams = inferRecordTypeParamsFromFields fields + if List.length typeParams = List.length typeArgs then + Some (List.zip typeParams typeArgs |> Map.ofList) + else + None + +/// Match a type pattern (may contain type variables) against a concrete type. +let rec matchTypePattern (pattern: AST.Type) (actual: AST.Type) : Result<(string * AST.Type) list, string> = + match pattern with + | AST.TVar name -> + match actual with + | AST.TVar actualName when actualName = name -> Ok [] + | _ -> Ok [(name, actual)] + | _ -> + match actual with + | AST.TVar _ -> + // ANF-side inference may observe unresolved constructor type args. + // Treat unconstrained actual type variables as compatible placeholders. + Ok [] + | _ -> + match pattern with + | AST.TFunction (patternParams, patternRet) -> + match actual with + | AST.TFunction (actualParams, actualRet) when List.length patternParams = List.length actualParams -> + let paramResults = + List.zip patternParams actualParams + |> List.map (fun (p, a) -> matchTypePattern p a) + let retResult = matchTypePattern patternRet actualRet + (paramResults @ [retResult]) + |> List.fold (fun acc res -> + match acc, res with + | Ok bindings, Ok newBindings -> Ok (bindings @ newBindings) + | Error e, _ -> Error e + | _, Error e -> Error e) (Ok []) + | _ -> Error "Function type mismatch" + | AST.TTuple patternElems -> + match actual with + | AST.TTuple actualElems when List.length patternElems = List.length actualElems -> + List.zip patternElems actualElems + |> List.map (fun (p, a) -> matchTypePattern p a) + |> List.fold (fun acc res -> + match acc, res with + | Ok bindings, Ok newBindings -> Ok (bindings @ newBindings) + | Error e, _ -> Error e + | _, Error e -> Error e) (Ok []) + | _ -> Error "Tuple type mismatch" + | AST.TRecord (patternName, patternArgs) -> + match actual with + | AST.TRecord (actualName, actualArgs) + when patternName = actualName && List.length patternArgs = List.length actualArgs -> + List.zip patternArgs actualArgs + |> List.map (fun (p, a) -> matchTypePattern p a) + |> List.fold (fun acc res -> + match acc, res with + | Ok bindings, Ok newBindings -> Ok (bindings @ newBindings) + | Error e, _ -> Error e + | _, Error e -> Error e) (Ok []) + | _ -> Error "Record type mismatch" + | AST.TSum (patternName, patternArgs) -> + match actual with + | AST.TSum (actualName, actualArgs) + when patternName = actualName && List.length patternArgs = List.length actualArgs -> + List.zip patternArgs actualArgs + |> List.map (fun (p, a) -> matchTypePattern p a) + |> List.fold (fun acc res -> + match acc, res with + | Ok bindings, Ok newBindings -> Ok (bindings @ newBindings) + | Error e, _ -> Error e + | _, Error e -> Error e) (Ok []) + | _ -> + Error $"Sum type mismatch: expected {typeToString pattern}, got {typeToString actual}" + | AST.TList patternElem -> + match actual with + | AST.TList actualElem -> matchTypePattern patternElem actualElem + | _ -> Error "List type mismatch" + | AST.TDict (patternKey, patternValue) -> + match actual with + | AST.TDict (actualKey, actualValue) -> + match matchTypePattern patternKey actualKey, matchTypePattern patternValue actualValue with + | Ok keyBindings, Ok valueBindings -> Ok (keyBindings @ valueBindings) + | Error e, _ -> Error e + | _, Error e -> Error e + | _ -> Error "Dict type mismatch" + | _ -> + if pattern = actual then Ok [] else Error "Type mismatch" + +/// Consolidate type variable bindings, preferring concrete types when both appear. +let consolidateTypeBindings (bindings: (string * AST.Type) list) : Result, string> = + bindings + |> List.fold (fun acc (name, typ) -> + acc |> Result.bind (fun m -> + match Map.tryFind name m with + | None -> Ok (Map.add name typ m) + | Some existingType -> + if existingType = typ then + Ok m + elif containsTypeVar existingType && not (containsTypeVar typ) then + Ok (Map.add name typ m) + elif containsTypeVar typ && not (containsTypeVar existingType) then + Ok m + elif containsTypeVar existingType && containsTypeVar typ then + Ok m + else + Error $"Type variable {name} has conflicting inferences: {typeToString existingType} vs {typeToString typ}")) + (Ok Map.empty) + +/// Apply a substitution to an expression, replacing type variables in type annotations +let rec applySubstToExpr (subst: Substitution) (expr: AST.Expr) : AST.Expr = + match expr with + | AST.UnitLiteral | AST.Int64Literal _ | AST.Int128Literal _ | AST.Int8Literal _ | AST.Int16Literal _ | AST.Int32Literal _ + | AST.UInt8Literal _ | AST.UInt16Literal _ | AST.UInt32Literal _ | AST.UInt64Literal _ | AST.UInt128Literal _ + | AST.BoolLiteral _ | AST.StringLiteral _ | AST.CharLiteral _ | AST.FloatLiteral _ | AST.Var _ | AST.FuncRef _ | AST.Closure _ -> + expr // No types to substitute in literals, variables, function references, and closures + | AST.BinOp (op, left, right) -> + AST.BinOp (op, applySubstToExpr subst left, applySubstToExpr subst right) + | AST.UnaryOp (op, inner) -> + AST.UnaryOp (op, applySubstToExpr subst inner) + | AST.Let (name, value, body) -> + AST.Let (name, applySubstToExpr subst value, applySubstToExpr subst body) + | AST.If (cond, thenBranch, elseBranch) -> + AST.If (applySubstToExpr subst cond, applySubstToExpr subst thenBranch, applySubstToExpr subst elseBranch) + | AST.Call (funcName, args) -> + AST.Call (funcName, AST.NonEmptyList.map (applySubstToExpr subst) args) + | AST.TypeApp (funcName, typeArgs, args) -> + // Substitute in type arguments and value arguments + AST.TypeApp ( + funcName, + List.map (applySubstToType subst) typeArgs, + AST.NonEmptyList.map (applySubstToExpr subst) args + ) + | AST.TupleLiteral elements -> + AST.TupleLiteral (List.map (applySubstToExpr subst) elements) + | AST.TupleAccess (tuple, index) -> + AST.TupleAccess (applySubstToExpr subst tuple, index) + | AST.RecordLiteral (typeName, fields) -> + AST.RecordLiteral (typeName, List.map (fun (n, e) -> (n, applySubstToExpr subst e)) fields) + | AST.RecordUpdate (record, updates) -> + AST.RecordUpdate (applySubstToExpr subst record, List.map (fun (n, e) -> (n, applySubstToExpr subst e)) updates) + | AST.RecordAccess (record, fieldName) -> + AST.RecordAccess (applySubstToExpr subst record, fieldName) + | AST.Constructor (typeName, variantName, payload) -> + AST.Constructor (typeName, variantName, Option.map (applySubstToExpr subst) payload) + | AST.Match (scrutinee, cases) -> + AST.Match (applySubstToExpr subst scrutinee, + cases |> List.map (fun mc -> { mc with Guard = mc.Guard |> Option.map (applySubstToExpr subst); Body = applySubstToExpr subst mc.Body })) + | AST.ListLiteral elements -> + AST.ListLiteral (List.map (applySubstToExpr subst) elements) + | AST.ListCons (headElements, tail) -> + AST.ListCons (List.map (applySubstToExpr subst) headElements, applySubstToExpr subst tail) + | AST.Lambda (parameters, body) -> + // Substitute types in parameter annotations and body + let substParams = + parameters + |> AST.NonEmptyList.map (fun (name, ty) -> (name, applySubstToType subst ty)) + AST.Lambda (substParams, applySubstToExpr subst body) + | AST.Apply (func, args) -> + AST.Apply (applySubstToExpr subst func, AST.NonEmptyList.map (applySubstToExpr subst) args) + | AST.InterpolatedString parts -> + let substPart part = + match part with + | AST.StringText s -> AST.StringText s + | AST.StringExpr e -> AST.StringExpr (applySubstToExpr subst e) + AST.InterpolatedString (List.map substPart parts) + +/// Resolve type aliases to their target types +let rec resolveAliasType (aliasReg: AliasRegistry) (typ: AST.Type) : AST.Type = + match typ with + | AST.TRecord (name, []) -> + match Map.tryFind name aliasReg with + | Some ([], targetType) -> resolveAliasType aliasReg targetType + | Some (_, _) -> typ + | None -> typ + | AST.TSum (name, []) -> + match Map.tryFind name aliasReg with + | Some ([], targetType) -> resolveAliasType aliasReg targetType + | Some (_, _) -> typ + | None -> typ + | AST.TSum (name, args) -> + match Map.tryFind name aliasReg with + | Some (typeParams, targetType) -> + if List.length typeParams <> List.length args then + typ + else + let subst = List.zip typeParams args |> Map.ofList + let substituted = applySubstToType subst targetType + resolveAliasType aliasReg substituted + | None -> + AST.TSum (name, List.map (resolveAliasType aliasReg) args) + | AST.TRecord (name, args) -> + AST.TRecord (name, List.map (resolveAliasType aliasReg) args) + | AST.TTuple elems -> + AST.TTuple (List.map (resolveAliasType aliasReg) elems) + | AST.TList elem -> + AST.TList (resolveAliasType aliasReg elem) + | AST.TDict (k, v) -> + AST.TDict (resolveAliasType aliasReg k, resolveAliasType aliasReg v) + | AST.TFunction (args, ret) -> + AST.TFunction (List.map (resolveAliasType aliasReg) args, resolveAliasType aliasReg ret) + | _ -> typ + +/// Resolve type aliases within function signatures +let resolveAliasesInFunction (aliasReg: AliasRegistry) (funcDef: AST.FunctionDef) : AST.FunctionDef = + let resolvedParams = + funcDef.Params + |> AST.NonEmptyList.map (fun (name, typ) -> (name, resolveAliasType aliasReg typ)) + let resolvedReturnType = resolveAliasType aliasReg funcDef.ReturnType + { funcDef with Params = resolvedParams; ReturnType = resolvedReturnType } + +/// Specialize a generic function definition with specific type arguments +let specializeFunction (funcDef: AST.FunctionDef) (typeArgs: AST.Type list) : AST.FunctionDef = + // Build substitution from type parameters to type args + let subst = List.zip funcDef.TypeParams typeArgs |> Map.ofList + // Generate specialized name + let specializedName = specName funcDef.Name typeArgs + // Apply substitution to parameters, return type, and body + let specializedParams = + funcDef.Params + |> AST.NonEmptyList.map (fun (name, ty) -> (name, applySubstToType subst ty)) + let specializedReturnType = applySubstToType subst funcDef.ReturnType + let specializedBody = applySubstToExpr subst funcDef.Body + { Name = specializedName + TypeParams = [] // Specialized function has no type parameters + Params = specializedParams + ReturnType = specializedReturnType + Body = specializedBody } + +/// Collect all TypeApp call sites from an expression +let rec collectTypeApps (expr: AST.Expr) : Set = + match expr with + | AST.UnitLiteral | AST.Int64Literal _ | AST.Int128Literal _ | AST.Int8Literal _ | AST.Int16Literal _ | AST.Int32Literal _ + | AST.UInt8Literal _ | AST.UInt16Literal _ | AST.UInt32Literal _ | AST.UInt64Literal _ | AST.UInt128Literal _ + | AST.BoolLiteral _ | AST.StringLiteral _ | AST.CharLiteral _ | AST.FloatLiteral _ | AST.Var _ | AST.FuncRef _ | AST.Closure _ -> + Set.empty + | AST.BinOp (_, left, right) -> + Set.union (collectTypeApps left) (collectTypeApps right) + | AST.UnaryOp (_, inner) -> + collectTypeApps inner + | AST.Let (_, value, body) -> + Set.union (collectTypeApps value) (collectTypeApps body) + | AST.If (cond, thenBranch, elseBranch) -> + Set.union (collectTypeApps cond) (Set.union (collectTypeApps thenBranch) (collectTypeApps elseBranch)) + | AST.Call (_, args) -> + args |> exprArgsToList |> List.map collectTypeApps |> List.fold Set.union Set.empty + | AST.TypeApp (funcName, typeArgs, args) -> + // This is a generic call - collect this specialization plus any in args + let argSpecs = args |> exprArgsToList |> List.map collectTypeApps |> List.fold Set.union Set.empty + let hasTypeVars = List.exists containsTypeVar typeArgs + if hasTypeVars && (funcName = "__hash" || funcName = "__key_eq") then + argSpecs + elif (funcName = "Stdlib.Dict.fromList" || funcName = "Dict.fromList") + && exprArgsToList args = [AST.ListLiteral []] + && not hasTypeVars then + // Optimization: avoid building a Dict from an empty list when types are concrete. + Set.add ("Stdlib.Dict.empty", typeArgs) argSpecs + else + Set.add (funcName, typeArgs) argSpecs + | AST.TupleLiteral elements -> + elements |> List.map collectTypeApps |> List.fold Set.union Set.empty + | AST.TupleAccess (tuple, _) -> + collectTypeApps tuple + | AST.RecordLiteral (_, fields) -> + fields |> List.map (snd >> collectTypeApps) |> List.fold Set.union Set.empty + | AST.RecordUpdate (record, updates) -> + let recordSpecs = collectTypeApps record + let updatesSpecs = updates |> List.map (snd >> collectTypeApps) |> List.fold Set.union Set.empty + Set.union recordSpecs updatesSpecs + | AST.RecordAccess (record, _) -> + collectTypeApps record + | AST.Constructor (_, _, payload) -> + payload |> Option.map collectTypeApps |> Option.defaultValue Set.empty + | AST.Match (scrutinee, cases) -> + let scrutineeSpecs = collectTypeApps scrutinee + let caseSpecs = cases |> List.map (fun mc -> + let guardSpecs = mc.Guard |> Option.map collectTypeApps |> Option.defaultValue Set.empty + Set.union guardSpecs (collectTypeApps mc.Body)) |> List.fold Set.union Set.empty + Set.union scrutineeSpecs caseSpecs + | AST.ListLiteral elements -> + elements |> List.map collectTypeApps |> List.fold Set.union Set.empty + | AST.ListCons (headElements, tail) -> + let headsSpecs = headElements |> List.map collectTypeApps |> List.fold Set.union Set.empty + Set.union headsSpecs (collectTypeApps tail) + | AST.Lambda (_, body) -> + collectTypeApps body + | AST.Apply (func, args) -> + let funcSpecs = collectTypeApps func + let argsSpecs = args |> exprArgsToList |> List.map collectTypeApps |> List.fold Set.union Set.empty + Set.union funcSpecs argsSpecs + | AST.InterpolatedString parts -> + parts |> List.choose (fun part -> + match part with + | AST.StringText _ -> None + | AST.StringExpr e -> Some (collectTypeApps e)) + |> List.fold Set.union Set.empty + +/// Collect TypeApps from a function definition +let collectTypeAppsFromFunc (funcDef: AST.FunctionDef) : Set = + collectTypeApps funcDef.Body + +/// Specialize only the requested generic specs, returning new functions and a registry +let specializeFromSpecs (genericFuncDefs: GenericFuncDefs) (initialSpecs: Set) : SpecializationResult = + let rec iterate + (pendingSpecs: Set) + (processedSpecs: Set) + (accFuncs: AST.FunctionDef list) + (specRegistry: SpecRegistry) + (externalSpecs: Set) + : SpecializationResult = + let newSpecs = Set.difference pendingSpecs processedSpecs + if Set.isEmpty newSpecs then + { SpecializedFuncs = accFuncs + SpecRegistry = specRegistry + ExternalSpecs = externalSpecs } + else + let (newFuncs, newPendingSpecs, newRegistry, newExternal) = + newSpecs + |> Set.toList + |> List.fold + (fun (funcs, pending, registry, external) (funcName, typeArgs) -> + match Map.tryFind funcName genericFuncDefs with + | Some funcDef -> + let specialized = specializeFunction funcDef typeArgs + let registry' = Map.add (funcName, typeArgs) specialized.Name registry + let bodySpecs = collectTypeAppsFromFunc specialized + (specialized :: funcs, Set.union pending bodySpecs, registry', external) + | None -> + (funcs, pending, registry, Set.add (funcName, typeArgs) external)) + ([], Set.empty, specRegistry, externalSpecs) + + iterate + newPendingSpecs + (Set.union processedSpecs newSpecs) + (newFuncs @ accFuncs) + newRegistry + newExternal + + iterate initialSpecs Set.empty [] Map.empty Set.empty + +/// Replace TypeApp with Call using specialized name in an expression +let rec replaceTypeApps (expr: AST.Expr) : AST.Expr = + match expr with + | AST.UnitLiteral | AST.Int64Literal _ | AST.Int128Literal _ | AST.Int8Literal _ | AST.Int16Literal _ | AST.Int32Literal _ + | AST.UInt8Literal _ | AST.UInt16Literal _ | AST.UInt32Literal _ | AST.UInt64Literal _ | AST.UInt128Literal _ + | AST.BoolLiteral _ | AST.StringLiteral _ | AST.CharLiteral _ | AST.FloatLiteral _ | AST.Var _ | AST.FuncRef _ | AST.Closure _ -> + expr + | AST.BinOp (op, left, right) -> + AST.BinOp (op, replaceTypeApps left, replaceTypeApps right) + | AST.UnaryOp (op, inner) -> + AST.UnaryOp (op, replaceTypeApps inner) + | AST.Let (name, value, body) -> + AST.Let (name, replaceTypeApps value, replaceTypeApps body) + | AST.If (cond, thenBranch, elseBranch) -> + AST.If (replaceTypeApps cond, replaceTypeApps thenBranch, replaceTypeApps elseBranch) + | AST.Call (funcName, args) -> + AST.Call (funcName, AST.NonEmptyList.map replaceTypeApps args) + | AST.TypeApp (funcName, typeArgs, args) -> + // Replace with a regular Call to the specialized name + let hasTypeVars = List.exists containsTypeVar typeArgs + if (funcName = "Stdlib.Dict.fromList" || funcName = "Dict.fromList") + && exprArgsToList args = [AST.ListLiteral []] + && not hasTypeVars then + // Optimization: avoid building a Dict from an empty list when types are concrete. + let specializedName = specName "Stdlib.Dict.empty" typeArgs + AST.Call (specializedName, exprArgsFromList []) + elif isGenericKeyIntrinsicName funcName && hasTypeVars then + let replacedArgs = args |> exprArgsToList |> List.map replaceTypeApps + wrapWithIgnoredArgEvaluations replacedArgs (unresolvedKeyIntrinsicTypeArgErrorExpr funcName) + else + let specializedName = specName funcName typeArgs + AST.Call (specializedName, AST.NonEmptyList.map replaceTypeApps args) + | AST.TupleLiteral elements -> + AST.TupleLiteral (List.map replaceTypeApps elements) + | AST.TupleAccess (tuple, index) -> + AST.TupleAccess (replaceTypeApps tuple, index) + | AST.RecordLiteral (typeName, fields) -> + AST.RecordLiteral (typeName, List.map (fun (n, e) -> (n, replaceTypeApps e)) fields) + | AST.RecordUpdate (record, updates) -> + AST.RecordUpdate (replaceTypeApps record, List.map (fun (n, e) -> (n, replaceTypeApps e)) updates) + | AST.RecordAccess (record, fieldName) -> + AST.RecordAccess (replaceTypeApps record, fieldName) + | AST.Constructor (typeName, variantName, payload) -> + AST.Constructor (typeName, variantName, Option.map replaceTypeApps payload) + | AST.Match (scrutinee, cases) -> + AST.Match (replaceTypeApps scrutinee, + cases |> List.map (fun mc -> { mc with Guard = mc.Guard |> Option.map replaceTypeApps; Body = replaceTypeApps mc.Body })) + | AST.ListLiteral elements -> + AST.ListLiteral (List.map replaceTypeApps elements) + | AST.ListCons (headElements, tail) -> + AST.ListCons (List.map replaceTypeApps headElements, replaceTypeApps tail) + | AST.Lambda (parameters, body) -> + AST.Lambda (parameters, replaceTypeApps body) + | AST.Apply (func, args) -> + AST.Apply (replaceTypeApps func, AST.NonEmptyList.map replaceTypeApps args) + | AST.InterpolatedString parts -> + let replacePart part = + match part with + | AST.StringText s -> AST.StringText s + | AST.StringExpr e -> AST.StringExpr (replaceTypeApps e) + AST.InterpolatedString (List.map replacePart parts) + +let private isIntrinsicTypeAppName (funcName: string) : bool = + match funcName with + | "__raw_get" + | "__raw_set" + | "__empty_dict" + | "__dict_is_null" + | "__dict_get_tag" + | "__dict_to_rawptr" + | "__rawptr_to_dict" + | "__list_empty" + | "__list_is_null" + | "__list_get_tag" + | "__list_to_rawptr" + | "__rawptr_to_list" -> true + | _ -> false + +let private missingSpecMessage (funcName: string) (typeArgs: AST.Type list) : string = + let typeArgText = + typeArgs + |> List.map typeToMangledName + |> String.concat ", " + $"Missing specialization for {funcName}<{typeArgText}>" + +/// Replace TypeApp with Call using a precomputed specialization registry +let replaceTypeAppsWithRegistry (specRegistry: SpecRegistry) (expr: AST.Expr) : Result = + let rec mapResult (f: 'a -> Result<'b, string>) (items: 'a list) : Result<'b list, string> = + match items with + | [] -> Ok [] + | x :: xs -> + f x + |> Result.bind (fun x' -> + mapResult f xs + |> Result.map (fun xs' -> x' :: xs')) + + let rec replace (expr': AST.Expr) : Result = + match expr' with + | AST.UnitLiteral + | AST.Int64Literal _ | AST.Int128Literal _ + | AST.Int8Literal _ + | AST.Int16Literal _ + | AST.Int32Literal _ + | AST.UInt8Literal _ + | AST.UInt16Literal _ + | AST.UInt32Literal _ + | AST.UInt64Literal _ | AST.UInt128Literal _ + | AST.BoolLiteral _ + | AST.StringLiteral _ + | AST.CharLiteral _ + | AST.FloatLiteral _ + | AST.Var _ + | AST.FuncRef _ + | AST.Closure _ -> Ok expr' + | AST.BinOp (op, left, right) -> + replace left + |> Result.bind (fun left' -> + replace right + |> Result.map (fun right' -> AST.BinOp (op, left', right'))) + | AST.UnaryOp (op, inner) -> + replace inner |> Result.map (fun inner' -> AST.UnaryOp (op, inner')) + | AST.Let (name, value, body) -> + replace value + |> Result.bind (fun value' -> + replace body |> Result.map (fun body' -> AST.Let (name, value', body'))) + | AST.If (cond, thenBranch, elseBranch) -> + replace cond + |> Result.bind (fun cond' -> + replace thenBranch + |> Result.bind (fun thenBranch' -> + replace elseBranch + |> Result.map (fun elseBranch' -> AST.If (cond', thenBranch', elseBranch')))) + | AST.Call (funcName, args) -> + mapResult replace (exprArgsToList args) + |> Result.map (fun args' -> AST.Call (funcName, exprArgsFromList args')) + | AST.TypeApp (funcName, typeArgs, args) -> + let hasTypeVars = List.exists containsTypeVar typeArgs + let emptyDictSpec = (funcName = "Stdlib.Dict.fromList" || funcName = "Dict.fromList") + && exprArgsToList args = [AST.ListLiteral []] + && not hasTypeVars + let unresolvedKeyIntrinsicSpec = isGenericKeyIntrinsicName funcName && hasTypeVars + let resolvedNameResult = + if isGenericKeyIntrinsicName funcName then + Ok (specName funcName typeArgs) + elif isIntrinsicTypeAppName funcName then + Ok (specName funcName typeArgs) + elif emptyDictSpec then + let key = ("Stdlib.Dict.empty", typeArgs) + match Map.tryFind key specRegistry with + | Some name -> Ok name + | None -> Error (missingSpecMessage "Stdlib.Dict.empty" typeArgs) + else + match Map.tryFind (funcName, typeArgs) specRegistry with + | Some name -> Ok name + | None -> Error (missingSpecMessage funcName typeArgs) + + if unresolvedKeyIntrinsicSpec then + mapResult replace (exprArgsToList args) + |> Result.map (fun args' -> + wrapWithIgnoredArgEvaluations args' (unresolvedKeyIntrinsicTypeArgErrorExpr funcName)) + else + resolvedNameResult + |> Result.bind (fun resolvedName -> + if emptyDictSpec then + Ok (AST.Call (resolvedName, exprArgsFromList [])) + else + mapResult replace (exprArgsToList args) + |> Result.map (fun args' -> AST.Call (resolvedName, exprArgsFromList args'))) + | AST.TupleLiteral elements -> + mapResult replace elements + |> Result.map AST.TupleLiteral + | AST.TupleAccess (tuple, index) -> + replace tuple |> Result.map (fun tuple' -> AST.TupleAccess (tuple', index)) + | AST.RecordLiteral (typeName, fields) -> + fields + |> mapResult (fun (name, value) -> + replace value |> Result.map (fun value' -> (name, value'))) + |> Result.map (fun fields' -> AST.RecordLiteral (typeName, fields')) + | AST.RecordUpdate (record, updates) -> + replace record + |> Result.bind (fun record' -> + updates + |> mapResult (fun (name, value) -> + replace value |> Result.map (fun value' -> (name, value'))) + |> Result.map (fun updates' -> AST.RecordUpdate (record', updates'))) + | AST.RecordAccess (record, fieldName) -> + replace record |> Result.map (fun record' -> AST.RecordAccess (record', fieldName)) + | AST.Constructor (typeName, variantName, payload) -> + match payload with + | None -> Ok (AST.Constructor (typeName, variantName, None)) + | Some payloadExpr -> + replace payloadExpr + |> Result.map (fun payload' -> AST.Constructor (typeName, variantName, Some payload')) + | AST.Match (scrutinee, cases) -> + replace scrutinee + |> Result.bind (fun scrutinee' -> + cases + |> mapResult (fun mc -> + let guardResult = + match mc.Guard with + | None -> Ok None + | Some guardExpr -> replace guardExpr |> Result.map Some + guardResult + |> Result.bind (fun guard' -> + replace mc.Body + |> Result.map (fun body' -> { mc with Guard = guard'; Body = body' }))) + |> Result.map (fun cases' -> AST.Match (scrutinee', cases'))) + | AST.ListLiteral elements -> + mapResult replace elements |> Result.map AST.ListLiteral + | AST.ListCons (headElements, tail) -> + mapResult replace headElements + |> Result.bind (fun heads' -> + replace tail |> Result.map (fun tail' -> AST.ListCons (heads', tail'))) + | AST.Lambda (parameters, body) -> + replace body |> Result.map (fun body' -> AST.Lambda (parameters, body')) + | AST.Apply (func, args) -> + replace func + |> Result.bind (fun func' -> + mapResult replace (exprArgsToList args) + |> Result.map (fun args' -> AST.Apply (func', exprArgsFromList args'))) + | AST.InterpolatedString parts -> + parts + |> mapResult (function + | AST.StringText s -> Ok (AST.StringText s) + | AST.StringExpr e -> replace e |> Result.map AST.StringExpr) + |> Result.map AST.InterpolatedString + + replace expr + +/// Replace TypeApp with Call in a function definition +let replaceTypeAppsInFunc (funcDef: AST.FunctionDef) : AST.FunctionDef = + { funcDef with Body = replaceTypeApps funcDef.Body } + +/// Replace TypeApp with Call in a function definition using a registry +let replaceTypeAppsInFuncWithRegistry (specRegistry: SpecRegistry) (funcDef: AST.FunctionDef) : Result = + replaceTypeAppsWithRegistry specRegistry funcDef.Body + |> Result.map (fun body' -> { funcDef with Body = body' }) + +/// Replace TypeApp with Call across a program using a registry (drops generic defs) +let replaceTypeAppsInProgramWithRegistry (specRegistry: SpecRegistry) (program: AST.Program) : Result = + let (AST.Program topLevels) = program + let rec loop (remaining: AST.TopLevel list) (acc: AST.TopLevel list) : Result = + match remaining with + | [] -> Ok (AST.Program (List.rev acc)) + | tl :: rest -> + match tl with + | AST.FunctionDef f when not (List.isEmpty f.TypeParams) -> + loop rest acc + | AST.FunctionDef f -> + replaceTypeAppsInFuncWithRegistry specRegistry f + |> Result.bind (fun f' -> loop rest (AST.FunctionDef f' :: acc)) + | AST.Expression e -> + replaceTypeAppsWithRegistry specRegistry e + |> Result.bind (fun e' -> loop rest (AST.Expression e' :: acc)) + | AST.TypeDef td -> + loop rest (AST.TypeDef td :: acc) + + loop topLevels [] + +/// Check if a program needs lambda lowering (lambda inlining + lifting) +/// based on lambdas, closures, or function values. +let programNeedsLambdaLowering (knownFuncNames: Set) (program: AST.Program) : bool = + let rec exprNeedsLambdaLowering (bound: Set) (expr: AST.Expr) : bool = + match expr with + | AST.Lambda _ | AST.Apply _ | AST.FuncRef _ | AST.Closure _ -> + true + | AST.Var name -> + Set.contains name knownFuncNames && not (Set.contains name bound) + | AST.Let (name, value, body) -> + exprNeedsLambdaLowering bound value + || exprNeedsLambdaLowering (Set.add name bound) body + | AST.If (cond, thenBranch, elseBranch) -> + exprNeedsLambdaLowering bound cond + || exprNeedsLambdaLowering bound thenBranch + || exprNeedsLambdaLowering bound elseBranch + | AST.BinOp (_, left, right) -> + exprNeedsLambdaLowering bound left + || exprNeedsLambdaLowering bound right + | AST.UnaryOp (_, inner) -> + exprNeedsLambdaLowering bound inner + | AST.Call (_, args) + | AST.TypeApp (_, _, args) -> + args |> exprArgsToList |> List.exists (exprNeedsLambdaLowering bound) + | AST.TupleLiteral elems + | AST.ListLiteral elems -> + elems |> List.exists (exprNeedsLambdaLowering bound) + | AST.ListCons (headElements, tail) -> + (headElements |> List.exists (exprNeedsLambdaLowering bound)) + || exprNeedsLambdaLowering bound tail + | AST.TupleAccess (tuple, _) -> + exprNeedsLambdaLowering bound tuple + | AST.RecordLiteral (_, fields) -> + fields |> List.exists (fun (_, e) -> exprNeedsLambdaLowering bound e) + | AST.RecordUpdate (record, updates) -> + exprNeedsLambdaLowering bound record + || (updates |> List.exists (fun (_, e) -> exprNeedsLambdaLowering bound e)) + | AST.RecordAccess (record, _) -> + exprNeedsLambdaLowering bound record + | AST.Constructor (_, _, payload) -> + payload |> Option.exists (exprNeedsLambdaLowering bound) + | AST.Match (scrutinee, cases) -> + exprNeedsLambdaLowering bound scrutinee + || (cases |> List.exists (fun (mc: AST.MatchCase) -> + (mc.Guard |> Option.map (exprNeedsLambdaLowering bound) |> Option.defaultValue false) + || exprNeedsLambdaLowering bound mc.Body)) + | AST.InterpolatedString parts -> + parts |> List.exists (fun part -> + match part with + | AST.StringText _ -> false + | AST.StringExpr e -> exprNeedsLambdaLowering bound e) + | _ -> + false + + let (AST.Program topLevels) = program + let rec loop (remaining: AST.TopLevel list) : bool = + match remaining with + | [] -> false + | tl :: rest -> + match tl with + | AST.FunctionDef f -> + let paramNames = f.Params |> paramsToList |> List.map fst |> Set.ofList + if exprNeedsLambdaLowering paramNames f.Body then true else loop rest + | AST.Expression e -> + if exprNeedsLambdaLowering Set.empty e then true else loop rest + | AST.TypeDef _ -> + loop rest + + loop topLevels + +// ============================================================================= +// Lambda Inlining +// ============================================================================= +// For first-class function support, we inline lambdas at their call sites. +// This transforms: +// let f = (x: int) => x + 1 in f(5) +// Into: +// let f = (x: int) => x + 1 in ((x: int) => x + 1)(5) +// Which is then handled by immediate application desugaring. + +/// Environment mapping variable names to their lambda definitions +type LambdaEnv = Map + +/// Check if a variable occurs in an expression (for dead code elimination) +let rec varOccursInExpr (name: string) (expr: AST.Expr) : bool = + match expr with + | AST.UnitLiteral | AST.Int64Literal _ | AST.Int128Literal _ | AST.Int8Literal _ | AST.Int16Literal _ | AST.Int32Literal _ + | AST.UInt8Literal _ | AST.UInt16Literal _ | AST.UInt32Literal _ | AST.UInt64Literal _ | AST.UInt128Literal _ + | AST.BoolLiteral _ | AST.StringLiteral _ | AST.CharLiteral _ | AST.FloatLiteral _ -> false + | AST.Var n -> n = name + | AST.BinOp (_, left, right) -> varOccursInExpr name left || varOccursInExpr name right + | AST.UnaryOp (_, inner) -> varOccursInExpr name inner + | AST.Let (n, value, body) -> + varOccursInExpr name value || (n <> name && varOccursInExpr name body) + | AST.If (cond, thenBranch, elseBranch) -> + varOccursInExpr name cond || varOccursInExpr name thenBranch || varOccursInExpr name elseBranch + | AST.Call (funcName, args) -> + // funcName could be a lambda variable reference (parser can't distinguish) + funcName = name || (args |> exprArgsToList |> List.exists (varOccursInExpr name)) + | AST.TypeApp (_, _, args) -> args |> exprArgsToList |> List.exists (varOccursInExpr name) + | AST.TupleLiteral elements -> List.exists (varOccursInExpr name) elements + | AST.TupleAccess (tuple, _) -> varOccursInExpr name tuple + | AST.RecordLiteral (_, fields) -> List.exists (fun (_, e) -> varOccursInExpr name e) fields + | AST.RecordUpdate (record, updates) -> + varOccursInExpr name record || List.exists (fun (_, e) -> varOccursInExpr name e) updates + | AST.RecordAccess (record, _) -> varOccursInExpr name record + | AST.Constructor (_, _, payload) -> Option.exists (varOccursInExpr name) payload + | AST.Match (scrutinee, cases) -> + varOccursInExpr name scrutinee || + List.exists (fun (mc: AST.MatchCase) -> + (mc.Guard |> Option.map (varOccursInExpr name) |> Option.defaultValue false) || + varOccursInExpr name mc.Body) cases + | AST.ListLiteral elements -> List.exists (varOccursInExpr name) elements + | AST.ListCons (headElements, tail) -> + List.exists (varOccursInExpr name) headElements || varOccursInExpr name tail + | AST.Lambda (parameters, body) -> + // If name is shadowed by a parameter, it doesn't occur + let paramNames = parameters |> paramsToList |> List.map fst |> Set.ofList + if Set.contains name paramNames then false + else varOccursInExpr name body + | AST.Apply (func, args) -> + varOccursInExpr name func || (args |> exprArgsToList |> List.exists (varOccursInExpr name)) + | AST.FuncRef _ -> + false // Function references don't contain variable references + | AST.Closure (_, captures) -> + // Check if name occurs in captured expressions + List.exists (varOccursInExpr name) captures + | AST.InterpolatedString parts -> + parts |> List.exists (fun part -> + match part with + | AST.StringText _ -> false + | AST.StringExpr e -> varOccursInExpr name e) + +/// Inline lambdas at Apply sites +/// lambdaEnv: maps variable names to their lambda expressions +let rec inlineLambdas (expr: AST.Expr) (lambdaEnv: LambdaEnv) : AST.Expr = + match expr with + | AST.UnitLiteral | AST.Int64Literal _ | AST.Int128Literal _ | AST.Int8Literal _ | AST.Int16Literal _ | AST.Int32Literal _ + | AST.UInt8Literal _ | AST.UInt16Literal _ | AST.UInt32Literal _ | AST.UInt64Literal _ | AST.UInt128Literal _ + | AST.BoolLiteral _ | AST.StringLiteral _ | AST.CharLiteral _ | AST.FloatLiteral _ -> + expr + | AST.Var _ -> expr // Variable references stay as-is (not at call position) + | AST.BinOp (op, left, right) -> + AST.BinOp (op, inlineLambdas left lambdaEnv, inlineLambdas right lambdaEnv) + | AST.UnaryOp (op, inner) -> + AST.UnaryOp (op, inlineLambdas inner lambdaEnv) + | AST.Let (name, value, body) -> + let value' = inlineLambdas value lambdaEnv + // If the value is a lambda, add it to the environment for the body + let lambdaEnv' = + match value' with + | AST.Lambda _ -> Map.add name value' lambdaEnv + | _ -> lambdaEnv + let body' = inlineLambdas body lambdaEnv' + // Dead lambda elimination: if the value was a lambda and the variable + // is no longer used in the body (all uses were inlined), drop the binding + match value' with + | AST.Lambda _ when not (varOccursInExpr name body') -> body' + | _ -> AST.Let (name, value', body') + | AST.If (cond, thenBranch, elseBranch) -> + AST.If (inlineLambdas cond lambdaEnv, inlineLambdas thenBranch lambdaEnv, inlineLambdas elseBranch lambdaEnv) + | AST.Call (funcName, args) -> + let args' = AST.NonEmptyList.map (fun a -> inlineLambdas a lambdaEnv) args + // Check if funcName is actually a lambda variable (parser can't distinguish) + match Map.tryFind funcName lambdaEnv with + | Some lambdaExpr -> AST.Apply (lambdaExpr, args') + | None -> AST.Call (funcName, args') + | AST.TypeApp (funcName, typeArgs, args) -> + AST.TypeApp (funcName, typeArgs, AST.NonEmptyList.map (fun a -> inlineLambdas a lambdaEnv) args) + | AST.TupleLiteral elements -> + AST.TupleLiteral (List.map (fun e -> inlineLambdas e lambdaEnv) elements) + | AST.TupleAccess (tuple, index) -> + AST.TupleAccess (inlineLambdas tuple lambdaEnv, index) + | AST.RecordLiteral (typeName, fields) -> + AST.RecordLiteral (typeName, List.map (fun (n, e) -> (n, inlineLambdas e lambdaEnv)) fields) + | AST.RecordUpdate (record, updates) -> + AST.RecordUpdate (inlineLambdas record lambdaEnv, List.map (fun (n, e) -> (n, inlineLambdas e lambdaEnv)) updates) + | AST.RecordAccess (record, fieldName) -> + AST.RecordAccess (inlineLambdas record lambdaEnv, fieldName) + | AST.Constructor (typeName, variantName, payload) -> + AST.Constructor (typeName, variantName, Option.map (fun e -> inlineLambdas e lambdaEnv) payload) + | AST.Match (scrutinee, cases) -> + AST.Match (inlineLambdas scrutinee lambdaEnv, + cases |> List.map (fun mc -> { mc with Guard = mc.Guard |> Option.map (fun g -> inlineLambdas g lambdaEnv); Body = inlineLambdas mc.Body lambdaEnv })) + | AST.ListLiteral elements -> + AST.ListLiteral (List.map (fun e -> inlineLambdas e lambdaEnv) elements) + | AST.ListCons (headElements, tail) -> + AST.ListCons (List.map (fun e -> inlineLambdas e lambdaEnv) headElements, inlineLambdas tail lambdaEnv) + | AST.Lambda (parameters, body) -> + // Lambdas can reference outer lambdas, so inline in body + AST.Lambda (parameters, inlineLambdas body lambdaEnv) + | AST.Apply (func, args) -> + let args' = AST.NonEmptyList.map (fun a -> inlineLambdas a lambdaEnv) args + match func with + | AST.Var name -> + // Check if this variable is a known lambda + match Map.tryFind name lambdaEnv with + | Some lambdaExpr -> + // Substitute the lambda at the call site + AST.Apply (lambdaExpr, args') + | None -> + // Unknown function variable - keep as-is (will error later if not valid) + AST.Apply (AST.Var name, args') + | _ -> + // Non-variable function (could be lambda or other expr) + AST.Apply (inlineLambdas func lambdaEnv, args') + | AST.FuncRef _ -> + // Function references don't need lambda inlining + expr + | AST.Closure (funcName, captures) -> + // Inline lambdas in captured expressions + AST.Closure (funcName, List.map (fun c -> inlineLambdas c lambdaEnv) captures) + | AST.InterpolatedString parts -> + let inlinePart part = + match part with + | AST.StringText s -> AST.StringText s + | AST.StringExpr e -> AST.StringExpr (inlineLambdas e lambdaEnv) + AST.InterpolatedString (List.map inlinePart parts) + +/// Inline lambdas in a function definition +let inlineLambdasInFunc (funcDef: AST.FunctionDef) : AST.FunctionDef = + { funcDef with Body = inlineLambdas funcDef.Body Map.empty } + +/// Inline lambdas in a program +let inlineLambdasInProgram (program: AST.Program) : AST.Program = + let (AST.Program topLevels) = program + let topLevels' = + topLevels + |> List.map (function + | AST.FunctionDef f -> AST.FunctionDef (inlineLambdasInFunc f) + | AST.Expression e -> AST.Expression (inlineLambdas e Map.empty) + | AST.TypeDef t -> AST.TypeDef t) + AST.Program topLevels' + +// ============================================================================ +// Lambda Lifting: Convert Lambdas to Top-Level Functions with Closures +// ============================================================================ +// +// Lambda lifting transforms nested lambda expressions into top-level functions. +// The process handles both capturing and non-capturing lambdas uniformly. +// +// Algorithm: +// 1. Identify lambdas in argument positions (function calls, let bindings) +// 2. Collect free variables (captures) from each lambda body +// 3. Generate a lifted function with signature: (closure_tuple, original_params...) -> result +// 4. Replace the lambda with a ClosureAlloc expression containing the function and captures +// +// Closure representation at runtime: +// [func_ptr, cap1, cap2, ...] -- heap-allocated tuple +// +// The lifted function extracts captures from the closure tuple: +// let __closure_N(__closure, x, y) = +// let cap1 = __closure.1 +// let cap2 = __closure.2 +// in +// +// All function values use closures for uniform calling convention, even non-capturing +// lambdas and function references. This simplifies higher-order function support. +// +// See docs/features/closures.md for detailed documentation. +// ============================================================================ + +/// State for lambda lifting - tracks generated functions and counter +type LiftState = { + Counter: int + LiftedFunctions: AST.FunctionDef list + TypeEnv: Map // Variable name -> Type (for tracking types of captured variables) + FuncParams: Map // Function name -> params (for inferring function value types) + FuncReturnTypes: Map // Function name -> Return type (for inferring call result types) + GenericFuncDefs: Map // Function name -> (TypeParams, ReturnType) for TypeApp substitution + TypeReg: TypeRegistry + VariantLookup: VariantLookup +} + +let private liftedNameExists (state: LiftState) (name: string) : bool = + Map.containsKey name state.FuncParams + || (state.LiftedFunctions |> List.exists (fun f -> f.Name = name)) + +let rec private findNextLiftedNameCounter + (state: LiftState) + (prefix: string) + (counter: int) + : int = + let candidate = $"{prefix}{counter}" + if liftedNameExists state candidate then + findNextLiftedNameCounter state prefix (counter + 1) + else + counter + +let private freshLiftedName (state: LiftState) (prefix: string) : string * LiftState = + let nextCounter = findNextLiftedNameCounter state prefix state.Counter + let name = $"{prefix}{nextCounter}" + (name, { state with Counter = nextCounter + 1 }) + +/// Collect free variables in an expression (variables not bound by let or lambda parameters) +let rec freeVars (expr: AST.Expr) (bound: Set) : Set = + match expr with + | AST.UnitLiteral | AST.Int64Literal _ | AST.Int128Literal _ | AST.Int8Literal _ | AST.Int16Literal _ | AST.Int32Literal _ + | AST.UInt8Literal _ | AST.UInt16Literal _ | AST.UInt32Literal _ | AST.UInt64Literal _ | AST.UInt128Literal _ + | AST.BoolLiteral _ | AST.StringLiteral _ | AST.CharLiteral _ | AST.FloatLiteral _ -> Set.empty + | AST.Var name -> if Set.contains name bound then Set.empty else Set.singleton name + | AST.BinOp (_, left, right) -> Set.union (freeVars left bound) (freeVars right bound) + | AST.UnaryOp (_, inner) -> freeVars inner bound + | AST.Let (name, value, body) -> + let valueVars = freeVars value bound + let bodyVars = freeVars body (Set.add name bound) + Set.union valueVars bodyVars + | AST.If (cond, thenBr, elseBr) -> + Set.union (freeVars cond bound) (Set.union (freeVars thenBr bound) (freeVars elseBr bound)) + | AST.Call (funcName, args) -> + // Check if funcName is a local variable (not in bound) - if so, it's a free variable + // Top-level function names will be filtered out later since they won't be in TypeEnv + let funcFree = if Set.contains funcName bound then Set.empty else Set.singleton funcName + let argsFree = + args + |> exprArgsToList + |> List.map (fun a -> freeVars a bound) + |> List.fold Set.union Set.empty + Set.union funcFree argsFree + | AST.TypeApp (_, _, args) -> + args |> exprArgsToList |> List.map (fun a -> freeVars a bound) |> List.fold Set.union Set.empty + | AST.TupleLiteral elems | AST.ListLiteral elems -> + elems |> List.map (fun e -> freeVars e bound) |> List.fold Set.union Set.empty + | AST.ListCons (headElements, tail) -> + let headsFree = headElements |> List.map (fun e -> freeVars e bound) |> List.fold Set.union Set.empty + Set.union headsFree (freeVars tail bound) + | AST.TupleAccess (tuple, _) -> freeVars tuple bound + | AST.RecordLiteral (_, fields) -> + fields |> List.map (fun (_, e) -> freeVars e bound) |> List.fold Set.union Set.empty + | AST.RecordUpdate (record, updates) -> + let recordVars = freeVars record bound + let updateVars = updates |> List.map (fun (_, e) -> freeVars e bound) |> List.fold Set.union Set.empty + Set.union recordVars updateVars + | AST.RecordAccess (record, _) -> freeVars record bound + | AST.Constructor (_, _, payload) -> + payload |> Option.map (fun e -> freeVars e bound) |> Option.defaultValue Set.empty + | AST.Match (scrutinee, cases) -> + let scrutineeVars = freeVars scrutinee bound + let caseVars = cases |> List.map (fun mc -> + let guardVars = mc.Guard |> Option.map (fun g -> freeVars g bound) |> Option.defaultValue Set.empty + Set.union guardVars (freeVars mc.Body bound)) |> List.fold Set.union Set.empty + Set.union scrutineeVars caseVars + | AST.Lambda (parameters, body) -> + let paramNames = parameters |> paramsToList |> List.map fst |> Set.ofList + freeVars body (Set.union bound paramNames) + | AST.Apply (func, args) -> + let funcVars = freeVars func bound + let argVars = args |> exprArgsToList |> List.map (fun a -> freeVars a bound) |> List.fold Set.union Set.empty + Set.union funcVars argVars + | AST.FuncRef _ -> Set.empty + | AST.Closure (_, captures) -> + // Closure captures may contain free variables + captures |> List.map (fun c -> freeVars c bound) |> List.fold Set.union Set.empty + | AST.InterpolatedString parts -> + parts |> List.choose (fun part -> + match part with + | AST.StringText _ -> None + | AST.StringExpr e -> Some (freeVars e bound)) + |> List.fold Set.union Set.empty + +/// Simple type inference for lambda lifting - infers types of simple expressions +/// This allows let-bound variables to be captured in nested lambdas +let rec simpleInferType + (expr: AST.Expr) + (typeEnv: Map) + (funcParams: Map) + (funcReturnTypes: Map) + (genericFuncDefs: Map) + (typeReg: TypeRegistry) + (variantLookup: VariantLookup) + : AST.Type option = + let isIntType (typ: AST.Type) : bool = + match typ with + | AST.TInt8 | AST.TInt16 | AST.TInt32 | AST.TInt64 + | AST.TInt128 + | AST.TUInt8 | AST.TUInt16 | AST.TUInt32 | AST.TUInt64 + | AST.TUInt128 -> true + | _ -> false + + let isNumericType (typ: AST.Type) : bool = + isIntType typ || typ = AST.TFloat64 + + let mergeBindings (bindings: Map) (extra: Map) : Map = + Map.fold (fun acc name typ -> Map.add name typ acc) bindings extra + + let rec extractPatternBindings (pattern: AST.Pattern) (scrutType: AST.Type) : Map = + match pattern with + | AST.PVar name -> Map.ofList [(name, scrutType)] + | AST.PWildcard -> Map.empty + | AST.PInt64 _ | AST.PInt128Literal _ + | AST.PInt8Literal _ + | AST.PInt16Literal _ + | AST.PInt32Literal _ + | AST.PUInt8Literal _ + | AST.PUInt16Literal _ + | AST.PUInt32Literal _ + | AST.PUInt64Literal _ | AST.PUInt128Literal _ + | AST.PUnit + | AST.PBool _ + | AST.PString _ + | AST.PChar _ + | AST.PFloat _ -> Map.empty + | AST.PTuple innerPats -> + match scrutType with + | AST.TTuple elemTypes when List.length elemTypes = List.length innerPats -> + List.zip innerPats elemTypes + |> List.fold (fun acc (pat, typ) -> mergeBindings acc (extractPatternBindings pat typ)) Map.empty + | _ -> Map.empty + | AST.PRecord (typeName, fieldPats) -> + match Map.tryFind typeName typeReg with + | Some fields -> + fieldPats + |> List.fold (fun acc (fieldName, pat) -> + match fields |> List.tryFind (fun (name, _) -> name = fieldName) with + | Some (_, fieldType) -> mergeBindings acc (extractPatternBindings pat fieldType) + | None -> acc) Map.empty + | None -> Map.empty + | AST.PConstructor (variantName, payloadPat) -> + match Map.tryFind variantName variantLookup, payloadPat with + | Some (typeName, typeParams, _, Some payloadType), Some pat -> + let subst = + match scrutType with + | AST.TSum (scrutTypeName, typeArgs) + when scrutTypeName = typeName + && List.length typeParams = List.length typeArgs -> + List.zip typeParams typeArgs |> Map.ofList + | _ -> Map.empty + extractPatternBindings pat (applySubstToType subst payloadType) + | _ -> Map.empty + | AST.PList innerPats -> + match scrutType with + | AST.TList elemType -> + innerPats + |> List.fold (fun acc pat -> mergeBindings acc (extractPatternBindings pat elemType)) Map.empty + | _ -> Map.empty + | AST.PListCons (headPats, tailPat) -> + match scrutType with + | AST.TList elemType -> + let headBindings = + headPats + |> List.fold (fun acc pat -> mergeBindings acc (extractPatternBindings pat elemType)) Map.empty + mergeBindings headBindings (extractPatternBindings tailPat scrutType) + | _ -> Map.empty + + match expr with + | AST.Int64Literal _ -> Some AST.TInt64 + | AST.Int128Literal _ -> Some AST.TInt128 + | AST.Int8Literal _ -> Some AST.TInt8 + | AST.Int16Literal _ -> Some AST.TInt16 + | AST.Int32Literal _ -> Some AST.TInt32 + | AST.UInt8Literal _ -> Some AST.TUInt8 + | AST.UInt16Literal _ -> Some AST.TUInt16 + | AST.UInt32Literal _ -> Some AST.TUInt32 + | AST.UInt64Literal _ -> Some AST.TUInt64 + | AST.UInt128Literal _ -> Some AST.TUInt128 + | AST.BoolLiteral _ -> Some AST.TBool + | AST.StringLiteral _ -> Some AST.TString + | AST.CharLiteral _ -> Some AST.TChar + | AST.FloatLiteral _ -> Some AST.TFloat64 + | AST.UnitLiteral -> Some AST.TUnit + | AST.Var name -> + match Map.tryFind name typeEnv with + | Some typ -> Some typ + | None -> + match Map.tryFind name funcParams, Map.tryFind name funcReturnTypes with + | Some parameters, Some returnType -> + Some (AST.TFunction (parameters |> List.map snd, returnType)) + | _ -> None + | AST.Let (name, value, body) -> + let valueType = simpleInferType value typeEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup + let typeEnv' = + match valueType with + | Some typ -> Map.add name typ typeEnv + | None -> typeEnv + simpleInferType body typeEnv' funcParams funcReturnTypes genericFuncDefs typeReg variantLookup + | AST.TupleLiteral elements -> + // Recursively infer types of tuple elements + let elemTypes = elements |> List.map (fun e -> simpleInferType e typeEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup) + if List.forall Option.isSome elemTypes then + Some (AST.TTuple (elemTypes |> List.map Option.get)) + else + None + | AST.TupleAccess (tupleExpr, index) -> + match simpleInferType tupleExpr typeEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup with + | Some (AST.TTuple elemTypes) when index >= 0 && index < List.length elemTypes -> + Some (List.item index elemTypes) + | _ -> None + | AST.RecordLiteral (typeName, fields) -> + if typeName = "" then + None + else + match Map.tryFind typeName typeReg with + | None -> + Some (AST.TRecord (typeName, [])) + | Some expectedFields -> + let fieldMap = Map.ofList fields + let typeParams = inferRecordTypeParamsFromFields expectedFields + let rec inferBindings remaining acc = + match remaining with + | [] -> Some acc + | (fieldName, expectedFieldType) :: rest -> + match Map.tryFind fieldName fieldMap with + | None -> inferBindings rest acc + | Some fieldExpr -> + match simpleInferType fieldExpr typeEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup with + | None -> inferBindings rest acc + | Some actualFieldType -> + match matchTypePattern expectedFieldType actualFieldType with + | Ok newBindings -> inferBindings rest (acc @ newBindings) + | Error _ -> inferBindings rest acc + + match inferBindings expectedFields [] with + | None -> + Some (AST.TRecord (typeName, [])) + | Some bindings -> + match consolidateTypeBindings bindings with + | Error _ -> + Some (AST.TRecord (typeName, [])) + | Ok subst -> + let typeArgs = + typeParams + |> List.map (fun name -> Map.tryFind name subst |> Option.defaultValue (AST.TVar name)) + Some (AST.TRecord (typeName, typeArgs)) + | AST.RecordAccess (recordExpr, fieldName) -> + match simpleInferType recordExpr typeEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup with + | Some (AST.TRecord (typeName, typeArgs)) -> + match Map.tryFind typeName typeReg with + | Some fields -> + fields + |> List.tryFind (fun (name, _) -> name = fieldName) + |> Option.map (fun (_, fieldTypePattern) -> + match buildRecordFieldSubst fields typeArgs with + | Some subst -> applySubstToType subst fieldTypePattern + | None -> fieldTypePattern) + | None -> None + | _ -> None + | AST.Constructor (typeName, variantName, payload) -> + // Sum type constructor has the sum type; infer generic args from payload when possible. + match Map.tryFind variantName variantLookup with + | Some (sumTypeName, typeParams, _, payloadPattern) -> + let defaultTypeArgs = typeParams |> List.map AST.TVar + match payloadPattern, payload with + | Some expectedPayloadType, Some payloadExpr -> + match simpleInferType payloadExpr typeEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup with + | Some actualPayloadType -> + match matchTypePattern expectedPayloadType actualPayloadType with + | Ok bindings -> + match consolidateTypeBindings bindings with + | Ok subst -> + let typeArgs = + typeParams + |> List.map (fun typeParam -> + Map.tryFind typeParam subst |> Option.defaultValue (AST.TVar typeParam)) + Some (AST.TSum (sumTypeName, typeArgs)) + | Error _ -> + Some (AST.TSum (sumTypeName, defaultTypeArgs)) + | Error _ -> + Some (AST.TSum (sumTypeName, defaultTypeArgs)) + | None -> + Some (AST.TSum (sumTypeName, defaultTypeArgs)) + | _ -> + Some (AST.TSum (sumTypeName, defaultTypeArgs)) + | None -> + if typeName = "" then + None + else + Some (AST.TSum (typeName, [])) + | AST.BinOp (op, left, right) -> + let leftType = simpleInferType left typeEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup + let rightType = simpleInferType right typeEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup + match op with + | AST.Add | AST.Sub | AST.Mul | AST.Div | AST.Mod -> + match leftType, rightType with + | Some lt, Some rt when lt = rt && isNumericType lt -> Some lt + | Some (AST.TVar _), Some rt when isNumericType rt -> Some rt + | Some lt, Some (AST.TVar _) when isNumericType lt -> Some lt + | _ -> None + | AST.Shl | AST.Shr | AST.BitAnd | AST.BitOr | AST.BitXor -> + match leftType, rightType with + | Some lt, Some rt when lt = rt && isIntType lt -> Some lt + | _ -> None + | AST.Eq | AST.Neq | AST.Lt | AST.Gt | AST.Lte | AST.Gte | AST.And | AST.Or -> Some AST.TBool + | AST.StringConcat -> Some AST.TString + | AST.Call (funcName, args) -> + // Look up the function's return type, checking local bindings first + match Map.tryFind funcName typeEnv with + | Some (AST.TFunction (paramTypes, returnType)) -> + let argCount = args |> exprArgsToList |> List.length + let paramCount = List.length paramTypes + if argCount = paramCount then + Some returnType + elif argCount < paramCount then + Some (AST.TFunction (paramTypes |> List.skip argCount, returnType)) + else + None + | Some (AST.TVar funcTypeVar) -> + // Higher-order generic values can remain unresolved in interpreter syntax. + // Keep lambda lifting moving by modeling a symbolic return type. + Some (AST.TVar $"__call_result_{funcTypeVar}") + | _ -> + Map.tryFind funcName funcReturnTypes + | AST.TypeApp (funcName, typeArgs, _) -> + // Look up the generic function's definition and apply type substitution + match Map.tryFind funcName genericFuncDefs with + | Some (typeParams, returnType) when List.length typeParams = List.length typeArgs -> + // Build substitution from type params to type args + let subst = List.zip typeParams typeArgs |> Map.ofList + Some (applySubstToType subst returnType) + | _ -> + // Fall back to funcReturnTypes for non-generic or arity mismatch + Map.tryFind funcName funcReturnTypes + | AST.If (_, thenExpr, elseExpr) -> + match simpleInferType thenExpr typeEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup, + simpleInferType elseExpr typeEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup with + | Some thenType, Some elseType when thenType = elseType -> Some thenType + | _ -> None + | AST.Match (scrutinee, cases) -> + let scrutineeType = simpleInferType scrutinee typeEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup + let caseTypes = + cases + |> List.map (fun mc -> + let patterns = AST.NonEmptyList.toList mc.Patterns + let caseEnv = + match scrutineeType with + | Some scrutType -> + patterns + |> List.map (fun pat -> extractPatternBindings pat scrutType) + |> List.fold mergeBindings typeEnv + | None -> typeEnv + simpleInferType mc.Body caseEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup) + if List.forall Option.isSome caseTypes then + let types = caseTypes |> List.choose id + match types with + | first :: rest when rest |> List.forall (fun t -> t = first) -> Some first + | _ -> None + else + None + | AST.Lambda (parameters, body) -> + let paramTypes = parameters |> paramsToList |> List.map snd + let lambdaParamTypes = parameters |> paramsToList |> Map.ofList + let typeEnv' = Map.fold (fun acc k v -> Map.add k v acc) typeEnv lambdaParamTypes + match simpleInferType body typeEnv' funcParams funcReturnTypes genericFuncDefs typeReg variantLookup with + | Some returnType -> Some (AST.TFunction (paramTypes, returnType)) + | None -> None + | AST.Apply (funcExpr, args) -> + match simpleInferType funcExpr typeEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup with + | Some (AST.TFunction (paramTypes, returnType)) -> + let argCount = args |> exprArgsToList |> List.length + let paramCount = List.length paramTypes + if argCount = paramCount then + Some returnType + elif argCount < paramCount then + Some (AST.TFunction (paramTypes |> List.skip argCount, returnType)) + else + None + | _ -> None + | _ -> None // Complex expressions require full type inference + +let inferLambdaReturnType (body: AST.Expr) (state: LiftState) : Result = + match simpleInferType body state.TypeEnv state.FuncParams state.FuncReturnTypes state.GenericFuncDefs state.TypeReg state.VariantLookup with + | Some returnType -> Ok returnType + | None -> Error "Lambda lifting could not infer return type for lambda body" + +/// Lift lambdas in an expression, returning (transformed expr, new state) +let rec liftLambdasInExpr (expr: AST.Expr) (state: LiftState) : Result = + match expr with + | AST.UnitLiteral | AST.Int64Literal _ | AST.Int128Literal _ | AST.Int8Literal _ | AST.Int16Literal _ | AST.Int32Literal _ + | AST.UInt8Literal _ | AST.UInt16Literal _ | AST.UInt32Literal _ | AST.UInt64Literal _ | AST.UInt128Literal _ + | AST.BoolLiteral _ | AST.StringLiteral _ | AST.CharLiteral _ | AST.FloatLiteral _ | AST.Var _ | AST.FuncRef _ | AST.Closure _ -> + Ok (expr, state) + | AST.BinOp (op, left, right) -> + liftLambdasInExpr left state + |> Result.bind (fun (left', state1) -> + liftLambdasInExpr right state1 + |> Result.map (fun (right', state2) -> (AST.BinOp (op, left', right'), state2))) + | AST.UnaryOp (op, inner) -> + liftLambdasInExpr inner state + |> Result.map (fun (inner', state') -> (AST.UnaryOp (op, inner'), state')) + | AST.Let (name, value, body) -> + liftLambdasInExpr value state + |> Result.bind (fun (value', state1) -> + // Try to infer the type of the value for capturing in nested lambdas + let valueType = simpleInferType value state1.TypeEnv state1.FuncParams state1.FuncReturnTypes state1.GenericFuncDefs state1.TypeReg state1.VariantLookup + let state1' = match valueType with + | Some t -> { state1 with TypeEnv = Map.add name t state1.TypeEnv } + | None -> state1 + liftLambdasInExpr body state1' + |> Result.map (fun (body', state2) -> + // Restore TypeEnv (remove the let binding) + let state2' = { state2 with TypeEnv = Map.remove name state2.TypeEnv } + (AST.Let (name, value', body'), state2'))) + | AST.If (cond, thenBr, elseBr) -> + liftLambdasInExpr cond state + |> Result.bind (fun (cond', state1) -> + liftLambdasInExpr thenBr state1 + |> Result.bind (fun (thenBr', state2) -> + liftLambdasInExpr elseBr state2 + |> Result.map (fun (elseBr', state3) -> (AST.If (cond', thenBr', elseBr'), state3)))) + | AST.Call (funcName, args) -> + // Process args, lifting any lambdas + liftLambdasInArgs args state + |> Result.map (fun (args', state') -> (AST.Call (funcName, args'), state')) + | AST.TypeApp (funcName, typeArgs, args) -> + liftLambdasInArgs args state + |> Result.map (fun (args', state') -> (AST.TypeApp (funcName, typeArgs, args'), state')) + | AST.TupleLiteral elems -> + liftLambdasInList elems state + |> Result.map (fun (elems', state') -> (AST.TupleLiteral elems', state')) + | AST.ListLiteral elems -> + liftLambdasInList elems state + |> Result.map (fun (elems', state') -> (AST.ListLiteral elems', state')) + | AST.ListCons (headElements, tail) -> + liftLambdasInList headElements state + |> Result.bind (fun (heads', state') -> + liftLambdasInExpr tail state' + |> Result.map (fun (tail', state'') -> (AST.ListCons (heads', tail'), state''))) + | AST.TupleAccess (tuple, index) -> + liftLambdasInExpr tuple state + |> Result.map (fun (tuple', state') -> (AST.TupleAccess (tuple', index), state')) + | AST.RecordLiteral (typeName, fields) -> + liftLambdasInFields fields state + |> Result.map (fun (fields', state') -> (AST.RecordLiteral (typeName, fields'), state')) + | AST.RecordUpdate (record, updates) -> + liftLambdasInExpr record state + |> Result.bind (fun (record', state1) -> + liftLambdasInFields updates state1 + |> Result.map (fun (updates', state2) -> (AST.RecordUpdate (record', updates'), state2))) + | AST.RecordAccess (record, fieldName) -> + liftLambdasInExpr record state + |> Result.map (fun (record', state') -> (AST.RecordAccess (record', fieldName), state')) + | AST.Constructor (typeName, variantName, payload) -> + match payload with + | None -> Ok (expr, state) + | Some p -> + liftLambdasInExpr p state + |> Result.map (fun (p', state') -> (AST.Constructor (typeName, variantName, Some p'), state')) + | AST.Match (scrutinee, cases) -> + liftLambdasInExpr scrutinee state + |> Result.bind (fun (scrutinee', state1) -> + liftLambdasInCases cases state1 + |> Result.map (fun (cases', state2) -> (AST.Match (scrutinee', cases'), state2))) + | AST.Lambda (parameters, body) -> + // Lambda in expression position - lift it to a closure + // Add lambda parameters to type environment before processing body + let lambdaParamTypes = parameters |> paramsToList |> Map.ofList + let stateWithLambdaParams = { state with TypeEnv = Map.fold (fun acc k v -> Map.add k v acc) state.TypeEnv lambdaParamTypes } + // First, lift any lambdas within the body + liftLambdasInExpr body stateWithLambdaParams + |> Result.bind (fun (body', state1) -> + // Now lift this lambda itself to a closure + let paramNames = parameters |> paramsToList |> List.map fst |> Set.ofList + let freeVarsInBody = freeVars body' paramNames + // Filter to only include variables actually in TypeEnv (excludes top-level function names) + let captures = freeVarsInBody |> Set.filter (fun name -> Map.containsKey name state.TypeEnv) |> Set.toList + + // Get actual types of captured variables from type environment + let rec collectCaptureTypes remaining acc = + match remaining with + | [] -> Ok (List.rev acc) + | name :: rest -> + match Map.tryFind name state.TypeEnv with + | Some t -> collectCaptureTypes rest (t :: acc) + | None -> Error $"Missing type for captured variable: {name}" + + collectCaptureTypes captures [] + |> Result.bind (fun captureTypes -> + // Create lifted function + let (funcName, stateWithName) = freshLiftedName state1 "__closure_" + // First element is function pointer (Int64), rest are captures with their actual types + let closureTupleTypes = AST.TInt64 :: captureTypes + let closureParam = ("__closure", AST.TTuple closureTupleTypes) + + // Build body that extracts captures from closure tuple + let bodyWithExtractions = + if List.isEmpty captures then + body' + else + captures + |> List.mapi (fun i capName -> + (capName, AST.TupleAccess (AST.Var "__closure", i + 1))) + |> List.foldBack (fun (capName, accessor) acc -> + AST.Let (capName, accessor, acc)) <| body' + + let stateForReturnType = { + stateWithLambdaParams with + FuncParams = state1.FuncParams + FuncReturnTypes = state1.FuncReturnTypes + GenericFuncDefs = state1.GenericFuncDefs + } + + inferLambdaReturnType body stateForReturnType + |> Result.bind (fun returnType -> + let funcDef : AST.FunctionDef = { + Name = funcName + TypeParams = [] + Params = AST.NonEmptyList.cons closureParam parameters + ReturnType = returnType + Body = bodyWithExtractions + } + let state' = { + Counter = stateWithName.Counter + LiftedFunctions = funcDef :: state1.LiftedFunctions + TypeEnv = state.TypeEnv // Restore original TypeEnv (exclude lambda params) + FuncParams = state1.FuncParams + FuncReturnTypes = state1.FuncReturnTypes + GenericFuncDefs = state1.GenericFuncDefs + TypeReg = state1.TypeReg + VariantLookup = state1.VariantLookup + } + // Replace lambda with Closure + let captureExprs = captures |> List.map AST.Var + Ok (AST.Closure (funcName, captureExprs), state')))) + | AST.Apply (func, args) -> + liftLambdasInExpr func state + |> Result.bind (fun (func', state1) -> + liftLambdasInArgs args state1 + |> Result.map (fun (args', state2) -> (AST.Apply (func', args'), state2))) + | AST.InterpolatedString parts -> + let rec liftParts (ps: AST.StringPart list) (st: LiftState) (acc: AST.StringPart list) : Result = + match ps with + | [] -> Ok (List.rev acc, st) + | AST.StringText s :: rest -> + liftParts rest st (AST.StringText s :: acc) + | AST.StringExpr e :: rest -> + liftLambdasInExpr e st + |> Result.bind (fun (e', st') -> + liftParts rest st' (AST.StringExpr e' :: acc)) + liftParts parts state [] + |> Result.map (fun (parts', state') -> (AST.InterpolatedString parts', state')) + +/// Lift lambdas in function arguments, converting all lambdas to Closures +/// (even non-capturing lambdas become trivial closures for uniform calling convention) +/// Also wraps FuncRef in closures for uniform calling convention +and liftLambdasInArgs (args: AST.NonEmptyList) (state: LiftState) : Result * LiftState, string> = + let rec loop (remaining: AST.Expr list) (state: LiftState) (acc: AST.Expr list) = + match remaining with + | [] -> Ok (exprArgsFromList (List.rev acc), state) + | arg :: rest -> + match arg with + | AST.Lambda (parameters, body) -> + // Add lambda parameters to type environment before processing body + let lambdaParamTypes = parameters |> paramsToList |> Map.ofList + let stateWithLambdaParams = { state with TypeEnv = Map.fold (fun acc k v -> Map.add k v acc) state.TypeEnv lambdaParamTypes } + // First, recursively lift any nested lambdas in the body + liftLambdasInExpr body stateWithLambdaParams + |> Result.bind (fun (body', state1) -> + // Check for free variables (captures) + let paramNames = parameters |> paramsToList |> List.map fst |> Set.ofList + let freeVarsInBody = freeVars body' paramNames + // Filter to only include variables actually in TypeEnv (excludes top-level function names) + let captures = freeVarsInBody |> Set.filter (fun name -> Map.containsKey name state.TypeEnv) |> Set.toList + + // Get actual types of captured variables from type environment + let rec collectCaptureTypes remaining acc = + match remaining with + | [] -> Ok (List.rev acc) + | name :: rest -> + match Map.tryFind name state.TypeEnv with + | Some t -> collectCaptureTypes rest (t :: acc) + | None -> Error $"Missing type for captured variable: {name}" + + let buildLiftedFunc captureTypes = + // All lambdas become closures (even non-capturing ones) for uniform calling convention + // The lifted function takes closure as first param, then original params + let (funcName, stateWithName) = freshLiftedName state1 "__closure_" + // First element is function pointer (Int64), rest are captures with their actual types + let closureTupleTypes = AST.TInt64 :: captureTypes + let closureParam = ("__closure", AST.TTuple closureTupleTypes) + + // Build body that extracts captures from closure tuple: + // let cap1 = __closure.1 in let cap2 = __closure.2 in ... original_body + let bodyWithExtractions = + if List.isEmpty captures then + body' // No captures to extract + else + captures + |> List.mapi (fun i capName -> + // Capture at index i+1 (index 0 is the function pointer) + (capName, AST.TupleAccess (AST.Var "__closure", i + 1))) + |> List.foldBack (fun (capName, accessor) acc -> + AST.Let (capName, accessor, acc)) <| body' + + let stateForReturnType = { + stateWithLambdaParams with + FuncParams = state1.FuncParams + FuncReturnTypes = state1.FuncReturnTypes + GenericFuncDefs = state1.GenericFuncDefs + } + + inferLambdaReturnType body stateForReturnType + |> Result.bind (fun returnType -> + let funcDef : AST.FunctionDef = { + Name = funcName + TypeParams = [] + Params = AST.NonEmptyList.cons closureParam parameters // Closure is always first param + ReturnType = returnType + Body = bodyWithExtractions + } + let state' = { + Counter = stateWithName.Counter + LiftedFunctions = funcDef :: state1.LiftedFunctions + TypeEnv = state.TypeEnv // Restore original TypeEnv (exclude lambda params) + FuncParams = state1.FuncParams + FuncReturnTypes = state1.FuncReturnTypes + GenericFuncDefs = state1.GenericFuncDefs + TypeReg = state1.TypeReg + VariantLookup = state1.VariantLookup + } + // Replace lambda with Closure (captures may be empty for non-capturing lambdas) + let captureExprs = captures |> List.map AST.Var + loop rest state' (AST.Closure (funcName, captureExprs) :: acc)) + + collectCaptureTypes captures [] + |> Result.bind buildLiftedFunc) + + | AST.FuncRef origFuncName -> + // Named function used as value - wrap in a closure for uniform calling convention + // Create wrapper: __funcref_wrapper_N(__closure, ...params) = origFunc(...params) + // Look up the actual function signature to generate correct wrapper + match Map.tryFind origFuncName state.FuncParams, Map.tryFind origFuncName state.FuncReturnTypes with + | Some origParams, Some origReturnType -> + let (wrapperName, stateWithName) = freshLiftedName state "__funcref_wrapper_" + let closureParam = ("__closure", AST.TTuple [AST.TInt64]) + // Generate parameter names for wrapper that match original function's parameters + let wrapperParams = origParams |> List.mapi (fun i (_, t) -> ($"__arg{i}", t)) + let wrapperArgs = wrapperParams |> List.map (fun (name, _) -> AST.Var name) + let wrapperBody = AST.Call (origFuncName, exprArgsFromList wrapperArgs) + let wrapperDef : AST.FunctionDef = { + Name = wrapperName + TypeParams = [] + Params = paramsFromList "liftLambdasInArgs:wrapperDef" (closureParam :: wrapperParams) + ReturnType = origReturnType + Body = wrapperBody + } + let state' = { + Counter = stateWithName.Counter + LiftedFunctions = wrapperDef :: state.LiftedFunctions + TypeEnv = state.TypeEnv + FuncParams = state.FuncParams + FuncReturnTypes = state.FuncReturnTypes + GenericFuncDefs = state.GenericFuncDefs + TypeReg = state.TypeReg + VariantLookup = state.VariantLookup + } + // Create trivial closure with no captures + loop rest state' (AST.Closure (wrapperName, []) :: acc) + | None, _ -> + Error $"FuncRef to unknown function '{origFuncName}': function parameters not found" + | _, None -> + Error $"FuncRef to unknown function '{origFuncName}': return type not found" + + | AST.Var varName -> + // Check if this is a function being passed as value + // For now, treat as potential function ref - will be handled at ANF level + liftLambdasInExpr arg state + |> Result.bind (fun (arg', state') -> loop rest state' (arg' :: acc)) + + | other -> + liftLambdasInExpr other state + |> Result.bind (fun (other', state') -> loop rest state' (other' :: acc)) + loop (exprArgsToList args) state [] + +/// Helper to lift lambdas in a list of expressions +and liftLambdasInList (exprs: AST.Expr list) (state: LiftState) : Result = + let rec loop (remaining: AST.Expr list) (state: LiftState) (acc: AST.Expr list) = + match remaining with + | [] -> Ok (List.rev acc, state) + | e :: rest -> + liftLambdasInExpr e state + |> Result.bind (fun (e', state') -> loop rest state' (e' :: acc)) + loop exprs state [] + +/// Helper to lift lambdas in record fields +and liftLambdasInFields (fields: (string * AST.Expr) list) (state: LiftState) : Result<(string * AST.Expr) list * LiftState, string> = + let rec loop (remaining: (string * AST.Expr) list) (state: LiftState) (acc: (string * AST.Expr) list) = + match remaining with + | [] -> Ok (List.rev acc, state) + | (name, e) :: rest -> + liftLambdasInExpr e state + |> Result.bind (fun (e', state') -> loop rest state' ((name, e') :: acc)) + loop fields state [] + +/// Helper to lift lambdas in match cases +and liftLambdasInCases (cases: AST.MatchCase list) (state: LiftState) : Result = + let rec loop (remaining: AST.MatchCase list) (state: LiftState) (acc: AST.MatchCase list) = + match remaining with + | [] -> Ok (List.rev acc, state) + | mc :: rest -> + // Lift lambdas in guard if present + let guardResult = + match mc.Guard with + | None -> Ok (None, state) + | Some g -> + liftLambdasInExpr g state + |> Result.map (fun (g', s) -> (Some g', s)) + guardResult + |> Result.bind (fun (guard', state1) -> + liftLambdasInExpr mc.Body state1 + |> Result.bind (fun (body', state2) -> + let newCase = { mc with Guard = guard'; Body = body' } + loop rest state2 (newCase :: acc))) + loop cases state [] + +/// Lift lambdas in a function definition +let liftLambdasInFunc (funcDef: AST.FunctionDef) (state: LiftState) : Result = + // Add function parameters to the type environment + let paramTypes = funcDef.Params |> paramsToList |> Map.ofList + let stateWithParams = { state with TypeEnv = Map.fold (fun acc k v -> Map.add k v acc) state.TypeEnv paramTypes } + liftLambdasInExpr funcDef.Body stateWithParams + |> Result.map (fun (body', state') -> + // Restore original TypeEnv (remove parameters) after processing the function + ({ funcDef with Body = body' }, { state' with TypeEnv = state.TypeEnv })) + +/// State extended to include known function names and their parameters +type LiftStateWithFuncs = { + State: LiftState + FuncParams: Map // function name -> params (for generating wrappers) + GeneratedWrappers: Map // original func name -> wrapper name +} + +/// Generate a wrapper for a named function used as a value +let generateFuncWrapper + (origFuncName: string) + (funcParams: Map) + (funcReturnTypes: Map) + (stateWithFuncs: LiftStateWithFuncs) + : Result<(AST.FunctionDef * LiftStateWithFuncs), string> = + match Map.tryFind origFuncName funcParams, Map.tryFind origFuncName funcReturnTypes with + | Some parameters, Some returnType -> + // Create wrapper: __funcref_wrapper_N(__closure, ...params) = origFunc(...params) + let (wrapperName, stateWithName) = freshLiftedName stateWithFuncs.State "__funcref_wrapper_" + let closureParam = ("__closure", AST.TTuple [AST.TInt64]) + let wrapperBody = + parameters + |> List.map (fun (name, _) -> AST.Var name) + |> exprArgsFromList + |> fun args -> AST.Call (origFuncName, args) + let wrapperDef : AST.FunctionDef = { + Name = wrapperName + TypeParams = [] + Params = paramsFromList "generateFuncWrapper" (closureParam :: parameters) + ReturnType = returnType + Body = wrapperBody + } + let newState = { + stateWithFuncs with + State = stateWithName + GeneratedWrappers = Map.add origFuncName wrapperName stateWithFuncs.GeneratedWrappers + } + Ok (wrapperDef, newState) + | None, _ -> + Error $"Cannot find parameters for function '{origFuncName}'" + | _, None -> + Error $"Cannot find return type for function '{origFuncName}'" + +/// Lift lambdas in a program, generating new top-level functions +let rec liftLambdasInProgram + (baseTypeReg: TypeRegistry) + (baseVariantLookup: VariantLookup) + (baseFuncParams: Map) + (baseFuncReturnTypes: Map) + (program: AST.Program) + : Result = + let (AST.Program topLevels) = program + + let typeRegBase : TypeRegistry = + topLevels + |> List.choose (function + | AST.TypeDef (AST.RecordDef (name, _typeParams, fields)) -> Some (name, fields) + | _ -> None) + |> Map.ofList + + let aliasReg : AliasRegistry = + topLevels + |> List.choose (function + | AST.TypeDef (AST.TypeAlias (name, typeParams, targetType)) -> Some (name, (typeParams, targetType)) + | _ -> None) + |> Map.ofList + + let typeReg = expandTypeRegWithAliases typeRegBase aliasReg + + let variantLookup : VariantLookup = + topLevels + |> List.choose (function + | AST.TypeDef (AST.SumTypeDef (typeName, typeParams, variants)) -> + Some (typeName, typeParams, variants) + | _ -> None) + |> List.collect (fun (typeName, typeParams, variants) -> + variants + |> List.mapi (fun idx variant -> (variant.Name, (typeName, typeParams, idx, variant.Payload)))) + |> Map.ofList + + let mergeMapsLocal m1 m2 = Map.fold (fun acc k v -> Map.add k v acc) m1 m2 + let mergedTypeReg = mergeMapsLocal baseTypeReg typeReg + let mergedVariantLookup = mergeMapsLocal baseVariantLookup variantLookup + + // First pass: collect all function definitions and their parameters + let userFuncParams : Map = + topLevels + |> List.choose (function + | AST.FunctionDef f -> Some (f.Name, paramsToList f.Params) + | _ -> None) + |> Map.ofList + + // Collect user function return types + let userFuncReturnTypes : Map = + topLevels + |> List.choose (function + | AST.FunctionDef f -> Some (f.Name, f.ReturnType) + | _ -> None) + |> Map.ofList + + // Add module function parameters from Stdlib + let moduleRegistry = Stdlib.buildModuleRegistry () + let moduleFuncParams : Map = + moduleRegistry + |> Map.toList + |> List.map (fun (qualifiedName, moduleFunc) -> + // Create parameter names like "arg0", "arg1" for each parameter type + let paramList = moduleFunc.ParamTypes |> List.mapi (fun i t -> ($"arg{i}", t)) + (qualifiedName, paramList)) + |> Map.ofList + + // Collect module function return types + let moduleFuncReturnTypes : Map = + moduleRegistry + |> Map.toList + |> List.map (fun (qualifiedName, moduleFunc) -> (qualifiedName, moduleFunc.ReturnType)) + |> Map.ofList + + // Collect user generic function definitions (for TypeApp substitution) + let userGenericFuncDefs : Map = + topLevels + |> List.choose (function + | AST.FunctionDef f when not (List.isEmpty f.TypeParams) -> + Some (f.Name, (f.TypeParams, f.ReturnType)) + | _ -> None) + |> Map.ofList + + // Collect module generic function definitions (for TypeApp substitution) + let moduleGenericFuncDefs : Map = + moduleRegistry + |> Map.toList + |> List.choose (fun (qualifiedName, moduleFunc) -> + if not (List.isEmpty moduleFunc.TypeParams) then + Some (qualifiedName, (moduleFunc.TypeParams, moduleFunc.ReturnType)) + else + None) + |> Map.ofList + + let funcParams = + Map.fold (fun acc k v -> Map.add k v acc) baseFuncParams (Map.fold (fun acc k v -> Map.add k v acc) userFuncParams moduleFuncParams) + let funcReturnTypes = + Map.fold (fun acc k v -> Map.add k v acc) baseFuncReturnTypes (Map.fold (fun acc k v -> Map.add k v acc) userFuncReturnTypes moduleFuncReturnTypes) + let genericFuncDefs = Map.fold (fun acc k v -> Map.add k v acc) userGenericFuncDefs moduleGenericFuncDefs + + let initialState = { + Counter = 0 + LiftedFunctions = [] + TypeEnv = Map.empty + FuncParams = funcParams + FuncReturnTypes = funcReturnTypes + GenericFuncDefs = genericFuncDefs + TypeReg = mergedTypeReg + VariantLookup = mergedVariantLookup + } + + let rec processTopLevels (remaining: AST.TopLevel list) (state: LiftState) (acc: AST.TopLevel list) : Result = + match remaining with + | [] -> Ok (List.rev acc, state) + | tl :: rest -> + match tl with + | AST.FunctionDef f -> + liftLambdasInFunc f state + |> Result.bind (fun (f', state') -> + processTopLevels rest state' (AST.FunctionDef f' :: acc)) + | AST.Expression e -> + liftLambdasInExpr e state + |> Result.bind (fun (e', state') -> + processTopLevels rest state' (AST.Expression e' :: acc)) + | AST.TypeDef t -> + processTopLevels rest state (AST.TypeDef t :: acc) + + processTopLevels topLevels initialState [] + |> Result.bind (fun (topLevels', state') -> + // Second pass: find all functions used as values and generate wrappers + // Look for Var references to known functions in Call arguments + let funcNamesUsedAsValues = + topLevels' + |> List.collect (function + | AST.FunctionDef f -> collectFuncRefsInExpr f.Body funcParams + | AST.Expression e -> collectFuncRefsInExpr e funcParams + | _ -> []) + |> List.distinct + + // Generate wrappers for functions used as values + let stateWithFuncs = { State = state'; FuncParams = funcParams; GeneratedWrappers = Map.empty } + let rec generateWrappers (funcNames: string list) (st: LiftStateWithFuncs) (wrapperAcc: AST.FunctionDef list) = + match funcNames with + | [] -> Ok (wrapperAcc, st) + | name :: rest -> + generateFuncWrapper name funcParams funcReturnTypes st + |> Result.bind (fun (wrapperDef, st') -> + generateWrappers rest st' (wrapperDef :: wrapperAcc)) + + generateWrappers funcNamesUsedAsValues stateWithFuncs [] + |> Result.map (fun (wrappers, finalStateWithFuncs) -> + // Replace function references with wrapper references in the program + let topLevels'' = topLevels' |> List.map (replaceFuncRefsWithWrappers finalStateWithFuncs.GeneratedWrappers) + // Add wrappers and lifted functions to the program + let liftedFuncDefs = (wrappers @ finalStateWithFuncs.State.LiftedFunctions) |> List.rev |> List.map AST.FunctionDef + AST.Program (liftedFuncDefs @ topLevels''))) + +/// Collect function names that are used as values (not in Call position) +and collectFuncRefsInExpr (expr: AST.Expr) (knownFuncs: Map) : string list = + match expr with + | AST.Call (_, args) -> + // Check if any arg is a reference to a known function + (exprArgsToList args) + |> List.collect (fun arg -> + match arg with + | AST.Var name when Map.containsKey name knownFuncs -> [name] + | _ -> collectFuncRefsInExpr arg knownFuncs) + | AST.Let (_, value, body) -> + // Also check if value is a function reference being bound + let valueRefs = + match value with + | AST.Var name when Map.containsKey name knownFuncs -> [name] + | _ -> collectFuncRefsInExpr value knownFuncs + valueRefs @ collectFuncRefsInExpr body knownFuncs + | AST.If (c, t, e) -> + collectFuncRefsInExpr c knownFuncs @ collectFuncRefsInExpr t knownFuncs @ collectFuncRefsInExpr e knownFuncs + | AST.BinOp (_, l, r) -> + collectFuncRefsInExpr l knownFuncs @ collectFuncRefsInExpr r knownFuncs + | AST.UnaryOp (_, e) -> collectFuncRefsInExpr e knownFuncs + | AST.TupleLiteral es | AST.ListLiteral es -> + es |> List.collect (fun e -> collectFuncRefsInExpr e knownFuncs) + | AST.ListCons (headElements, tail) -> + (headElements |> List.collect (fun e -> collectFuncRefsInExpr e knownFuncs)) @ + collectFuncRefsInExpr tail knownFuncs + | AST.TupleAccess (e, _) -> collectFuncRefsInExpr e knownFuncs + | AST.RecordLiteral (_, fields) -> + fields |> List.collect (fun (_, e) -> collectFuncRefsInExpr e knownFuncs) + | AST.RecordAccess (e, _) -> collectFuncRefsInExpr e knownFuncs + | AST.Constructor (_, _, payload) -> + payload |> Option.map (fun e -> collectFuncRefsInExpr e knownFuncs) |> Option.defaultValue [] + | AST.Match (scrut, cases) -> + collectFuncRefsInExpr scrut knownFuncs @ (cases |> List.collect (fun mc -> + (mc.Guard |> Option.map (fun g -> collectFuncRefsInExpr g knownFuncs) |> Option.defaultValue []) @ + collectFuncRefsInExpr mc.Body knownFuncs)) + | AST.Lambda (_, body) -> collectFuncRefsInExpr body knownFuncs + | AST.Apply (f, args) -> + collectFuncRefsInExpr f knownFuncs @ (args |> exprArgsToList |> List.collect (fun e -> collectFuncRefsInExpr e knownFuncs)) + | AST.Closure (_, caps) -> + caps |> List.collect (fun e -> collectFuncRefsInExpr e knownFuncs) + | AST.TypeApp (_, _, args) -> + args |> exprArgsToList |> List.collect (fun e -> collectFuncRefsInExpr e knownFuncs) + | _ -> [] + +/// Replace function references with wrapper references in a TopLevel +and replaceFuncRefsWithWrappers (wrapperMap: Map) (topLevel: AST.TopLevel) : AST.TopLevel = + match topLevel with + | AST.FunctionDef f -> + AST.FunctionDef { f with Body = replaceInExpr wrapperMap f.Body } + | AST.Expression e -> + AST.Expression (replaceInExpr wrapperMap e) + | AST.TypeDef t -> AST.TypeDef t + +/// Replace function references with wrapper references in an expression +and replaceInExpr (wrapperMap: Map) (expr: AST.Expr) : AST.Expr = + match expr with + | AST.Var name when Map.containsKey name wrapperMap -> + // This is a function reference used as a value - replace with closure to wrapper + AST.Closure (Map.find name wrapperMap, []) + | AST.Closure (funcName, caps) -> + // If this closure references a known function, use the wrapper instead + let newFuncName = Map.tryFind funcName wrapperMap |> Option.defaultValue funcName + AST.Closure (newFuncName, caps |> List.map (replaceInExpr wrapperMap)) + | AST.Call (name, args) -> + AST.Call (name, args |> AST.NonEmptyList.map (replaceInExpr wrapperMap)) + | AST.Let (n, v, b) -> + AST.Let (n, replaceInExpr wrapperMap v, replaceInExpr wrapperMap b) + | AST.If (c, t, e) -> + AST.If (replaceInExpr wrapperMap c, replaceInExpr wrapperMap t, replaceInExpr wrapperMap e) + | AST.BinOp (op, l, r) -> + AST.BinOp (op, replaceInExpr wrapperMap l, replaceInExpr wrapperMap r) + | AST.UnaryOp (op, e) -> + AST.UnaryOp (op, replaceInExpr wrapperMap e) + | AST.TupleLiteral es -> + AST.TupleLiteral (es |> List.map (replaceInExpr wrapperMap)) + | AST.TupleAccess (e, i) -> + AST.TupleAccess (replaceInExpr wrapperMap e, i) + | AST.RecordLiteral (t, fields) -> + AST.RecordLiteral (t, fields |> List.map (fun (n, e) -> (n, replaceInExpr wrapperMap e))) + | AST.RecordAccess (e, f) -> + AST.RecordAccess (replaceInExpr wrapperMap e, f) + | AST.Constructor (t, v, payload) -> + AST.Constructor (t, v, payload |> Option.map (replaceInExpr wrapperMap)) + | AST.Match (scrut, cases) -> + AST.Match (replaceInExpr wrapperMap scrut, + cases |> List.map (fun mc -> { mc with Guard = mc.Guard |> Option.map (replaceInExpr wrapperMap); Body = replaceInExpr wrapperMap mc.Body })) + | AST.ListLiteral es -> + AST.ListLiteral (es |> List.map (replaceInExpr wrapperMap)) + | AST.ListCons (headElements, tail) -> + AST.ListCons (headElements |> List.map (replaceInExpr wrapperMap), replaceInExpr wrapperMap tail) + | AST.Lambda (ps, body) -> + AST.Lambda (ps, replaceInExpr wrapperMap body) + | AST.Apply (f, args) -> + AST.Apply (replaceInExpr wrapperMap f, args |> AST.NonEmptyList.map (replaceInExpr wrapperMap)) + | AST.TypeApp (n, ts, args) -> + AST.TypeApp (n, ts, args |> AST.NonEmptyList.map (replaceInExpr wrapperMap)) + | _ -> expr + +/// Monomorphize a program: collect all specializations, generate specialized functions, replace TypeApps +/// Uses iterative approach: keep specializing until no new concrete TypeApps are found +let monomorphize (program: AST.Program) : AST.Program = + let (AST.Program topLevels) = program + + // Collect generic function definitions + let genericFuncDefs : GenericFuncDefs = + topLevels + |> List.choose (function + | AST.FunctionDef f when not (List.isEmpty f.TypeParams) -> Some (f.Name, f) + | _ -> None) + |> Map.ofList + + // Collect initial specialization sites from non-generic functions and expressions + let initialSpecs : Set = + topLevels + |> List.map (function + | AST.FunctionDef f when List.isEmpty f.TypeParams -> collectTypeAppsFromFunc f + | AST.Expression e -> collectTypeApps e + | _ -> Set.empty) + |> List.fold Set.union Set.empty + + // Iterate: specialize, collect new TypeApps from specialized bodies, repeat + let rec iterate (pendingSpecs: Set) (processedSpecs: Set) (accFuncs: AST.FunctionDef list) = + // Filter to only specs not yet processed + let newSpecs = Set.difference pendingSpecs processedSpecs + if Set.isEmpty newSpecs then + // No new specs, we're done + accFuncs + else + // Generate specialized functions for new specs + let (newFuncs, newPendingSpecs) = + newSpecs + |> Set.toList + |> List.fold (fun (funcs, pending) (funcName, typeArgs) -> + match Map.tryFind funcName genericFuncDefs with + | Some funcDef -> + let specialized = specializeFunction funcDef typeArgs + // Collect TypeApps from the specialized body (these may be new specs) + let bodySpecs = collectTypeAppsFromFunc specialized + (specialized :: funcs, Set.union pending bodySpecs) + | None -> + (funcs, pending)) ([], Set.empty) + + // Continue with new pending specs + iterate newPendingSpecs (Set.union processedSpecs newSpecs) (newFuncs @ accFuncs) + + // Run iterative specialization + let specializedFuncs = + iterate initialSpecs Set.empty [] + + // Replace all TypeApps with Calls in the program + let (specializedFuncsReplaced, transformedTopLevels) = + let specializedFuncsReplaced = specializedFuncs |> List.map replaceTypeAppsInFunc + let transformedTopLevels = + topLevels + |> List.choose (function + | AST.FunctionDef f when not (List.isEmpty f.TypeParams) -> + // Skip generic function definitions (they're replaced by specializations) + None + | AST.FunctionDef f -> + Some (AST.FunctionDef (replaceTypeAppsInFunc f)) + | AST.Expression e -> + Some (AST.Expression (replaceTypeApps e)) + | AST.TypeDef td -> + Some (AST.TypeDef td)) + (specializedFuncsReplaced, transformedTopLevels) + + // Add specialized functions to the program + let specializationTopLevels = + specializedFuncsReplaced |> List.map AST.FunctionDef + + AST.Program (specializationTopLevels @ transformedTopLevels) + +/// Monomorphize a program with access to external generic function definitions. +/// Used when user code needs to specialize stdlib generics - the stdlib generic +/// function bodies are passed in as externalGenericDefs so they can be specialized +/// without merging the full stdlib AST with user code. +/// Uses iterative approach: keep specializing until no new concrete TypeApps are found +let monomorphizeWithExternalDefs (externalGenericDefs: GenericFuncDefs) (program: AST.Program) : AST.Program = + let (AST.Program topLevels) = program + + // Collect generic function definitions from this program + let localGenericDefs = + extractGenericFuncDefs program + + // Merge external defs with local defs (local takes precedence) + let genericFuncDefs = + Map.fold (fun acc k v -> Map.add k v acc) externalGenericDefs localGenericDefs + + // Collect initial specialization sites from non-generic functions and expressions + let initialSpecs : Set = + topLevels + |> List.map (function + | AST.FunctionDef f when List.isEmpty f.TypeParams -> collectTypeAppsFromFunc f + | AST.Expression e -> collectTypeApps e + | _ -> Set.empty) + |> List.fold Set.union Set.empty + + // Iterate: specialize, collect new TypeApps from specialized bodies, repeat + let rec iterate (pendingSpecs: Set) (processedSpecs: Set) (accFuncs: AST.FunctionDef list) = + // Filter to only specs not yet processed + let newSpecs = Set.difference pendingSpecs processedSpecs + if Set.isEmpty newSpecs then + // No new specs, we're done + accFuncs + else + // Generate specialized functions for new specs + let (newFuncs, newPendingSpecs) = + newSpecs + |> Set.toList + |> List.fold (fun (funcs, pending) (funcName, typeArgs) -> + match Map.tryFind funcName genericFuncDefs with + | Some funcDef -> + let specialized = specializeFunction funcDef typeArgs + // Collect TypeApps from the specialized body (these may be new specs) + let bodySpecs = collectTypeAppsFromFunc specialized + (specialized :: funcs, Set.union pending bodySpecs) + | None -> + (funcs, pending)) ([], Set.empty) + + // Continue with new pending specs + iterate newPendingSpecs (Set.union processedSpecs newSpecs) (newFuncs @ accFuncs) + + // Run iterative specialization + let specializedFuncs = + iterate initialSpecs Set.empty [] + + // Replace all TypeApps with Calls in the program + let (specializedFuncsReplaced, transformedTopLevels) = + let specializedFuncsReplaced = specializedFuncs |> List.map replaceTypeAppsInFunc + let transformedTopLevels = + topLevels + |> List.choose (function + | AST.FunctionDef f when not (List.isEmpty f.TypeParams) -> + // Skip generic function definitions (they're replaced by specializations) + None + | AST.FunctionDef f -> + Some (AST.FunctionDef (replaceTypeAppsInFunc f)) + | AST.Expression e -> + Some (AST.Expression (replaceTypeApps e)) + | AST.TypeDef td -> + Some (AST.TypeDef td)) + (specializedFuncsReplaced, transformedTopLevels) + + // Add specialized functions to the program + let specializationTopLevels = + specializedFuncsReplaced |> List.map AST.FunctionDef + + AST.Program (specializationTopLevels @ transformedTopLevels) + +/// Convert AST.BinOp to ANF.BinOp +/// Note: StringConcat is handled separately as ANF.StringConcat CExpr +let convertBinOp (op: AST.BinOp) : ANF.BinOp = + match op with + | AST.Add -> ANF.Add + | AST.Sub -> ANF.Sub + | AST.Mul -> ANF.Mul + | AST.Div -> ANF.Div + | AST.Mod -> ANF.Mod + | AST.Shl -> ANF.Shl + | AST.Shr -> ANF.Shr + | AST.BitAnd -> ANF.BitAnd + | AST.BitOr -> ANF.BitOr + | AST.BitXor -> ANF.BitXor + | AST.Eq -> ANF.Eq + | AST.Neq -> ANF.Neq + | AST.Lt -> ANF.Lt + | AST.Gt -> ANF.Gt + | AST.Lte -> ANF.Lte + | AST.Gte -> ANF.Gte + | AST.And -> ANF.And + | AST.Or -> ANF.Or + | AST.StringConcat -> ANF.Add // Never reached - StringConcat handled as CExpr + +/// Convert AST.UnaryOp to ANF.UnaryOp +let convertUnaryOp (op: AST.UnaryOp) : ANF.UnaryOp = + match op with + | AST.Neg -> ANF.Neg + | AST.Not -> ANF.Not + | AST.BitNot -> ANF.BitNot + +/// Check if a type requires structural equality (compound types) +let isCompoundType (typ: AST.Type) : bool = + match typ with + | AST.TTuple _ -> true + | AST.TRecord _ -> true + | AST.TSum _ -> true + | _ -> false + +/// Generate structural equality comparison for compound types. +/// Returns a list of bindings and the final result atom that holds the comparison result. +let rec generateStructuralEquality + (leftAtom: ANF.Atom) + (rightAtom: ANF.Atom) + (typ: AST.Type) + (varGen: ANF.VarGen) + (typeReg: TypeRegistry) + (variantLookup: VariantLookup) + : (ANF.TempId * ANF.CExpr) list * ANF.Atom * ANF.VarGen = + // Keep bindings in reverse order during construction to avoid quadratic + // list appends when comparing deeply nested structures. + let addForwardBindingsToRev + (accRev: (ANF.TempId * ANF.CExpr) list) + (bindings: (ANF.TempId * ANF.CExpr) list) + : (ANF.TempId * ANF.CExpr) list = + List.fold (fun acc binding -> binding :: acc) accRev bindings + + let combineComparisonResult + (accResult: ANF.Atom option) + (nextResult: ANF.Atom) + (accBindingsRev: (ANF.TempId * ANF.CExpr) list) + (vg: ANF.VarGen) + : (ANF.Atom option * (ANF.TempId * ANF.CExpr) list * ANF.VarGen) = + match accResult with + | None -> + (Some nextResult, accBindingsRev, vg) + | Some previousResult -> + let (andVar, vg') = ANF.freshVar vg + let andExpr = ANF.Prim (ANF.And, previousResult, nextResult) + let updatedBindingsRev = (andVar, andExpr) :: accBindingsRev + (Some (ANF.Var andVar), updatedBindingsRev, vg') + + let finalizeBindings + (accResult: ANF.Atom option) + (accBindingsRev: (ANF.TempId * ANF.CExpr) list) + (vg: ANF.VarGen) + : (ANF.TempId * ANF.CExpr) list * ANF.Atom * ANF.VarGen = + match accResult with + | Some resultAtom -> + (List.rev accBindingsRev, resultAtom, vg) + | None -> + let (trueVar, vg') = ANF.freshVar vg + let bindingsRev = (trueVar, ANF.Atom (ANF.BoolLiteral true)) :: accBindingsRev + (List.rev bindingsRev, ANF.Var trueVar, vg') + + match typ with + | AST.TTuple elemTypes -> + let rec compareElements + (index: int) + (types: AST.Type list) + (accResult: ANF.Atom option) + (accBindingsRev: (ANF.TempId * ANF.CExpr) list) + (vg: ANF.VarGen) + : (ANF.TempId * ANF.CExpr) list * ANF.Atom * ANF.VarGen = + match types with + | [] -> + finalizeBindings accResult accBindingsRev vg + | elemType :: restTypes -> + let (leftElemVar, vg1) = ANF.freshVar vg + let leftGet = ANF.TupleGet (leftAtom, index) + let (rightElemVar, vg2) = ANF.freshVar vg1 + let rightGet = ANF.TupleGet (rightAtom, index) + let withElemBindingsRev = + addForwardBindingsToRev + accBindingsRev + [ (leftElemVar, leftGet); (rightElemVar, rightGet) ] + + let (elementResult, withComparisonBindingsRev, vg3) = + if isCompoundType elemType then + let (nestedBindings, nestedResult, vgNested) = + generateStructuralEquality + (ANF.Var leftElemVar) + (ANF.Var rightElemVar) + elemType + vg2 + typeReg + variantLookup + let updatedBindingsRev = + addForwardBindingsToRev withElemBindingsRev nestedBindings + (nestedResult, updatedBindingsRev, vgNested) + else + let (cmpVar, vgCmp) = ANF.freshVar vg2 + let cmpExpr = ANF.Prim (ANF.Eq, ANF.Var leftElemVar, ANF.Var rightElemVar) + let updatedBindingsRev = (cmpVar, cmpExpr) :: withElemBindingsRev + (ANF.Var cmpVar, updatedBindingsRev, vgCmp) + + let (updatedResult, updatedBindingsRev, vg4) = + combineComparisonResult accResult elementResult withComparisonBindingsRev vg3 + + compareElements (index + 1) restTypes updatedResult updatedBindingsRev vg4 + + compareElements 0 elemTypes None [] varGen + + | AST.TRecord (typeName, typeArgs) -> + match Map.tryFind typeName typeReg with + | None -> + let (cmpVar, vg') = ANF.freshVar varGen + ([(cmpVar, ANF.Prim (ANF.Eq, leftAtom, rightAtom))], ANF.Var cmpVar, vg') + | Some fields -> + let concreteFields = + match buildRecordFieldSubst fields typeArgs with + | Some subst -> + fields + |> List.map (fun (name, fieldType) -> (name, applySubstToType subst fieldType)) + | None -> + fields + + let rec compareFields + (index: int) + (fieldList: (string * AST.Type) list) + (accResult: ANF.Atom option) + (accBindingsRev: (ANF.TempId * ANF.CExpr) list) + (vg: ANF.VarGen) + : (ANF.TempId * ANF.CExpr) list * ANF.Atom * ANF.VarGen = + match fieldList with + | [] -> + finalizeBindings accResult accBindingsRev vg + | (_, fieldType) :: restFields -> + let (leftFieldVar, vg1) = ANF.freshVar vg + let leftGet = ANF.TupleGet (leftAtom, index) + let (rightFieldVar, vg2) = ANF.freshVar vg1 + let rightGet = ANF.TupleGet (rightAtom, index) + let withFieldBindingsRev = + addForwardBindingsToRev + accBindingsRev + [ (leftFieldVar, leftGet); (rightFieldVar, rightGet) ] + + let (fieldResult, withComparisonBindingsRev, vg3) = + if isCompoundType fieldType then + let (nestedBindings, nestedResult, vgNested) = + generateStructuralEquality + (ANF.Var leftFieldVar) + (ANF.Var rightFieldVar) + fieldType + vg2 + typeReg + variantLookup + let updatedBindingsRev = + addForwardBindingsToRev withFieldBindingsRev nestedBindings + (nestedResult, updatedBindingsRev, vgNested) + else + let (cmpVar, vgCmp) = ANF.freshVar vg2 + let cmpExpr = ANF.Prim (ANF.Eq, ANF.Var leftFieldVar, ANF.Var rightFieldVar) + let updatedBindingsRev = (cmpVar, cmpExpr) :: withFieldBindingsRev + (ANF.Var cmpVar, updatedBindingsRev, vgCmp) + + let (updatedResult, updatedBindingsRev, vg4) = + combineComparisonResult accResult fieldResult withComparisonBindingsRev vg3 + + compareFields (index + 1) restFields updatedResult updatedBindingsRev vg4 + + compareFields 0 concreteFields None [] varGen + + | AST.TSum (typeName, _) -> + let hasAnyPayload = + variantLookup + |> Map.exists (fun _ (tName, _, _, payloadType) -> + tName = typeName && payloadType.IsSome) + + if not hasAnyPayload then + let (cmpVar, vg') = ANF.freshVar varGen + ([(cmpVar, ANF.Prim (ANF.Eq, leftAtom, rightAtom))], ANF.Var cmpVar, vg') + else + let (leftTagVar, vg1) = ANF.freshVar varGen + let (rightTagVar, vg2) = ANF.freshVar vg1 + let (tagEqVar, vg3) = ANF.freshVar vg2 + let (leftPayloadVar, vg4) = ANF.freshVar vg3 + let (rightPayloadVar, vg5) = ANF.freshVar vg4 + let (payloadEqVar, vg6) = ANF.freshVar vg5 + let (resultVar, vg7) = ANF.freshVar vg6 + + let bindings = [ + (leftTagVar, ANF.TupleGet (leftAtom, 0)) + (rightTagVar, ANF.TupleGet (rightAtom, 0)) + (tagEqVar, ANF.Prim (ANF.Eq, ANF.Var leftTagVar, ANF.Var rightTagVar)) + (leftPayloadVar, ANF.TupleGet (leftAtom, 1)) + (rightPayloadVar, ANF.TupleGet (rightAtom, 1)) + (payloadEqVar, ANF.Prim (ANF.Eq, ANF.Var leftPayloadVar, ANF.Var rightPayloadVar)) + (resultVar, ANF.Prim (ANF.And, ANF.Var tagEqVar, ANF.Var payloadEqVar)) + ] + (bindings, ANF.Var resultVar, vg7) + + | _ -> + let (cmpVar, vg') = ANF.freshVar varGen + ([(cmpVar, ANF.Prim (ANF.Eq, leftAtom, rightAtom))], ANF.Var cmpVar, vg') + +/// Infer the type of an expression using type environment and registries +/// Used for type-directed field lookup in record access +let rec inferType (expr: AST.Expr) (typeEnv: Map) (typeReg: TypeRegistry) (variantLookup: VariantLookup) (funcReg: FunctionRegistry) (moduleRegistry: AST.ModuleRegistry) : Result = + match expr with + | AST.UnitLiteral -> Ok AST.TUnit + | AST.Int64Literal _ -> Ok AST.TInt64 + | AST.Int128Literal _ -> Ok AST.TInt128 + | AST.Int8Literal _ -> Ok AST.TInt8 + | AST.Int16Literal _ -> Ok AST.TInt16 + | AST.Int32Literal _ -> Ok AST.TInt32 + | AST.UInt8Literal _ -> Ok AST.TUInt8 + | AST.UInt16Literal _ -> Ok AST.TUInt16 + | AST.UInt32Literal _ -> Ok AST.TUInt32 + | AST.UInt64Literal _ -> Ok AST.TUInt64 + | AST.UInt128Literal _ -> Ok AST.TUInt128 + | AST.BoolLiteral _ -> Ok AST.TBool + | AST.StringLiteral _ -> Ok AST.TString + | AST.CharLiteral _ -> Ok AST.TChar + | AST.FloatLiteral _ -> Ok AST.TFloat64 + | AST.Var name -> + if isBuiltinTestNanName name then + Ok AST.TFloat64 + else + match tryLookupWithFallback name typeEnv with + | Some (t, _) -> Ok t + | None -> + // Check if it's a module function (e.g., Stdlib.Int64.add) + match Stdlib.tryGetFunctionWithFallback moduleRegistry name with + | Some (moduleFunc, _) -> Ok (Stdlib.getFunctionType moduleFunc) + | None -> Error $"Cannot infer type: undefined variable '{name}'" + | AST.RecordLiteral (typeName, fields) -> + if typeName = "" then + // Anonymous record literal - try to find matching type by field names + let literalFieldNames = fields |> List.map fst |> Set.ofList + let matchingTypes = + typeReg + |> Map.toList + |> List.filter (fun (_, typeFields) -> + let typeFieldNames = typeFields |> List.map fst |> Set.ofList + typeFieldNames = literalFieldNames) + |> List.map fst + match matchingTypes with + | [singleMatch] -> Ok (AST.TRecord (singleMatch, [])) + | [] -> Error "Cannot infer type: no record type matches the field names" + | matches -> + let names = String.concat ", " matches + Error $"Ambiguous record literal: matches multiple types: {names}" + else + match Map.tryFind typeName typeReg with + | None -> + Error $"Unknown record type: {typeName}" + | Some expectedFields -> + let fieldMap = Map.ofList fields + let typeParams = inferRecordTypeParamsFromFields expectedFields + + let rec inferBindings + (remainingFields: (string * AST.Type) list) + (accBindings: (string * AST.Type) list) + : Result<(string * AST.Type) list, string> = + match remainingFields with + | [] -> Ok accBindings + | (fieldName, expectedFieldType) :: rest -> + match Map.tryFind fieldName fieldMap with + | None -> + // Type checker should have enforced completeness already. + inferBindings rest accBindings + | Some fieldExpr -> + inferType fieldExpr typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun actualFieldType -> + matchTypePattern expectedFieldType actualFieldType + |> Result.bind (fun newBindings -> + inferBindings rest (accBindings @ newBindings))) + + inferBindings expectedFields [] + |> Result.bind consolidateTypeBindings + |> Result.map (fun subst -> + let typeArgs = + typeParams + |> List.map (fun typeParam -> + Map.tryFind typeParam subst |> Option.defaultValue (AST.TVar typeParam)) + AST.TRecord (typeName, typeArgs)) + | AST.RecordUpdate (recordExpr, _) -> + // Record update returns the same type as the record being updated + inferType recordExpr typeEnv typeReg variantLookup funcReg moduleRegistry + | AST.RecordAccess (recordExpr, fieldName) -> + inferType recordExpr typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun recordType -> + match recordType with + | AST.TRecord (typeName, typeArgs) -> + match Map.tryFind typeName typeReg with + | Some fields -> + match List.tryFind (fun (name, _) -> name = fieldName) fields with + | Some (_, fieldTypePattern) -> + let fieldType = + match buildRecordFieldSubst fields typeArgs with + | Some subst -> applySubstToType subst fieldTypePattern + | None -> fieldTypePattern + Ok fieldType + | None -> Error $"Record type {typeName} has no field '{fieldName}'" + | None -> Error $"Unknown record type: {typeName}" + | _ -> Error $"Cannot access field on non-record type") + | AST.TupleLiteral elems -> + elems + |> List.map (fun e -> inferType e typeEnv typeReg variantLookup funcReg moduleRegistry) + |> List.fold (fun acc r -> + match acc, r with + | Ok types, Ok t -> Ok (types @ [t]) + | Error e, _ -> Error e + | _, Error e -> Error e) (Ok []) + |> Result.map AST.TTuple + | AST.TupleAccess (tupleExpr, index) -> + inferType tupleExpr typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun tupleType -> + match tupleType with + | AST.TTuple elemTypes when index >= 0 && index < List.length elemTypes -> + Ok (List.item index elemTypes) + | AST.TTuple _ -> Error $"Tuple index {index} out of bounds" + | _ -> Error "Cannot access index on non-tuple type") + | AST.Constructor (_, variantName, payload) -> + match Map.tryFind variantName variantLookup with + | None -> + Error $"Unknown constructor: {variantName}" + | Some (typeName, typeParams, _, payloadPattern) -> + let defaultTypeArgs = typeParams |> List.map AST.TVar + match payloadPattern, payload with + | Some expectedPayloadType, Some payloadExpr -> + inferType payloadExpr typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun actualPayloadType -> + match matchTypePattern expectedPayloadType actualPayloadType with + | Error _ -> + Ok (AST.TSum (typeName, defaultTypeArgs)) + | Ok bindings -> + match consolidateTypeBindings bindings with + | Error _ -> + Ok (AST.TSum (typeName, defaultTypeArgs)) + | Ok subst -> + let typeArgs = + typeParams + |> List.map (fun typeParam -> + Map.tryFind typeParam subst |> Option.defaultValue (AST.TVar typeParam)) + Ok (AST.TSum (typeName, typeArgs))) + | _ -> + Ok (AST.TSum (typeName, defaultTypeArgs)) + | AST.ListLiteral elements -> + match elements with + | [] -> Ok (AST.TList (AST.TVar "t")) // Preserve unknown element type for empty lists + | first :: _ -> + inferType first typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun elemType -> AST.TList elemType) + | AST.ListCons (headElements, tail) -> + // List cons has same element type as tail, but refine unknown element types from heads. + inferType tail typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun tailType -> + match tailType with + | AST.TList elemType -> + let reconcileElemType (current: AST.Type) (next: AST.Type) : Result = + if containsTypeVar current && not (containsTypeVar next) then Ok next + elif containsTypeVar next && not (containsTypeVar current) then Ok current + elif current = next then Ok current + else Error $"List cons element type mismatch: {typeToString current} vs {typeToString next}" + + let rec refineElemType (current: AST.Type) (elems: AST.Expr list) : Result = + match elems with + | [] -> Ok current + | head :: rest -> + inferType head typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun headType -> + reconcileElemType current headType + |> Result.bind (fun refined -> refineElemType refined rest)) + + refineElemType elemType headElements + |> Result.map (fun finalElemType -> AST.TList finalElemType) + | _ -> Ok tailType) + | AST.Let (name, value, body) -> + inferType value typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun valueType -> + let typeEnv' = Map.add name valueType typeEnv + inferType body typeEnv' typeReg variantLookup funcReg moduleRegistry) + | AST.If (_, thenExpr, elseExpr) -> + let inferBranchType (branchExpr: AST.Expr) : Result = + inferType branchExpr typeEnv typeReg variantLookup funcReg moduleRegistry + + let resolveBranchType (preferred: AST.Type) (other: AST.Type) : Result = + match matchTypePattern preferred other with + | Error _ -> Error "Branch type mismatch" + | Ok bindings -> + match consolidateTypeBindings bindings with + | Error e -> Error e + | Ok subst -> Ok (applySubstToType subst preferred) + + inferBranchType thenExpr + |> Result.bind (fun thenType -> + inferBranchType elseExpr + |> Result.bind (fun elseType -> + if thenType = elseType then + Ok thenType + elif thenType = AST.TRuntimeError then + Ok elseType + elif elseType = AST.TRuntimeError then + Ok thenType + else + match resolveBranchType thenType elseType, resolveBranchType elseType thenType with + | Ok resolvedThen, Ok resolvedElse -> + if containsTypeVar resolvedThen && not (containsTypeVar resolvedElse) then + Ok resolvedElse + elif containsTypeVar resolvedElse && not (containsTypeVar resolvedThen) then + Ok resolvedThen + else + Ok resolvedThen + | Ok resolvedThen, Error _ -> Ok resolvedThen + | Error _, Ok resolvedElse -> Ok resolvedElse + | Error _, Error _ -> + Error + $"If branches have incompatible types: then={typeToString thenType}, else={typeToString elseType}")) + | AST.BinOp (op, left, right) -> + let ensureSameType () = + inferType left typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun leftType -> + inferType right typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun rightType -> + if leftType = rightType then Ok leftType + else Error $"Binary operator operands must match: left={leftType}, right={rightType}")) + match op with + | AST.Add | AST.Sub | AST.Mul | AST.Div | AST.Mod -> + ensureSameType () + |> Result.bind (fun operandType -> + match operandType with + | AST.TInt8 | AST.TInt16 | AST.TInt32 | AST.TInt64 + | AST.TUInt8 | AST.TUInt16 | AST.TUInt32 | AST.TUInt64 + | AST.TFloat64 -> Ok operandType + | _ -> Error $"Arithmetic operator requires numeric operands, got {operandType}") + | AST.Shl | AST.Shr | AST.BitAnd | AST.BitOr | AST.BitXor -> + ensureSameType () + |> Result.bind (fun operandType -> + match operandType with + | AST.TInt8 | AST.TInt16 | AST.TInt32 | AST.TInt64 + | AST.TUInt8 | AST.TUInt16 | AST.TUInt32 | AST.TUInt64 -> Ok operandType + | _ -> Error $"Bitwise operator requires integer operands, got {operandType}") + | AST.Eq | AST.Neq -> Ok AST.TBool + | AST.Lt | AST.Gt | AST.Lte | AST.Gte -> + ensureSameType () + |> Result.bind (fun operandType -> + match operandType with + | AST.TInt8 | AST.TInt16 | AST.TInt32 | AST.TInt64 + | AST.TUInt8 | AST.TUInt16 | AST.TUInt32 | AST.TUInt64 + | AST.TFloat64 -> Ok AST.TBool + | _ -> Error $"Comparison operator requires numeric operands, got {operandType}") + | AST.And | AST.Or -> Ok AST.TBool + | AST.StringConcat -> Ok AST.TString + | AST.UnaryOp (op, inner) -> + inferType inner typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun innerType -> + match op with + | AST.Neg -> + match innerType with + | AST.TInt8 | AST.TInt16 | AST.TInt32 | AST.TInt64 + | AST.TUInt8 | AST.TUInt16 | AST.TUInt32 | AST.TUInt64 + | AST.TFloat64 -> Ok innerType + | _ -> Error $"Negation requires numeric operand, got {innerType}" + | AST.Not -> + match innerType with + | AST.TBool -> Ok AST.TBool + | _ -> Error $"Logical not requires Bool operand, got {innerType}" + | AST.BitNot -> + match innerType with + | AST.TInt8 | AST.TInt16 | AST.TInt32 | AST.TInt64 -> Ok innerType + | _ -> Error $"Bitwise not requires integer operand, got {innerType}") + | AST.Match (scrutinee, cases) -> + // Infer from first case body, but first extend environment with pattern variables + // Infer scrutinee type to help with pattern variable typing + let scrutineeTypeResult = inferType scrutinee typeEnv typeReg variantLookup funcReg moduleRegistry + + let rec substituteType (subst: Map) (typ: AST.Type) : AST.Type = + match typ with + | AST.TVar name -> Map.tryFind name subst |> Option.defaultValue typ + | AST.TTuple elems -> AST.TTuple (List.map (substituteType subst) elems) + | AST.TRecord (name, args) -> AST.TRecord (name, List.map (substituteType subst) args) + | AST.TList elem -> AST.TList (substituteType subst elem) + | AST.TDict (k, v) -> AST.TDict (substituteType subst k, substituteType subst v) + | AST.TSum (name, args) -> AST.TSum (name, List.map (substituteType subst) args) + | AST.TFunction (args, ret) -> AST.TFunction (List.map (substituteType subst) args, substituteType subst ret) + | _ -> typ + + // Helper to extract pattern variable names and infer their types + let rec extractPatternBindings (pattern: AST.Pattern) (scrutType: AST.Type) : Map = + match pattern with + | AST.PVar name -> Map.ofList [(name, scrutType)] + | AST.PWildcard -> Map.empty + | AST.PInt64 _ | AST.PInt128Literal _ + | AST.PInt8Literal _ + | AST.PInt16Literal _ + | AST.PInt32Literal _ + | AST.PUInt8Literal _ + | AST.PUInt16Literal _ + | AST.PUInt32Literal _ + | AST.PUInt64Literal _ | AST.PUInt128Literal _ + | AST.PUnit + | AST.PBool _ + | AST.PString _ + | AST.PChar _ + | AST.PFloat _ -> Map.empty + | AST.PTuple innerPats -> + let tupleElemTypesOpt = + match scrutType with + | AST.TTuple elemTypes when List.length elemTypes = List.length innerPats -> + Some elemTypes + | AST.TVar tupleTypeVar -> + // Preserve unresolved tuple element types rather than dropping bindings + // or defaulting to a concrete numeric type. + innerPats + |> List.mapi (fun idx _ -> AST.TVar $"__tuple_elem_{tupleTypeVar}_{idx}") + |> Some + | AST.TRuntimeError -> + innerPats + |> List.mapi (fun idx _ -> AST.TVar $"__tuple_elem_runtime_error_{idx}") + |> Some + | _ -> + None + + match tupleElemTypesOpt with + | Some elemTypes when List.length elemTypes = List.length innerPats -> + List.zip innerPats elemTypes + |> List.fold (fun acc (pat, typ) -> Map.fold (fun m k v -> Map.add k v m) acc (extractPatternBindings pat typ)) Map.empty + | _ -> + // Non-matching tuple patterns must not introduce bindings with fabricated types. + // Type checking treats these as non-matching alternatives. + Map.empty + | AST.PRecord (patternRecordName, fieldPats) -> + let collectRecordFieldBindings (fieldTypeForName: string -> AST.Type) : Map = + fieldPats + |> List.fold (fun acc (fieldName, pat) -> + let fieldType = fieldTypeForName fieldName + Map.fold + (fun m k v -> Map.add k v m) + acc + (extractPatternBindings pat fieldType)) + Map.empty + + match scrutType with + | AST.TRecord (scrutRecordName, _) -> + // Preserve concrete field types from the matched record. + // Falling back to Int64 here causes downstream mis-lowering (e.g. string == uses pointer eq). + let recordFields = + if Map.containsKey scrutRecordName typeReg then + Map.find scrutRecordName typeReg + elif Map.containsKey patternRecordName typeReg then + Map.find patternRecordName typeReg + else + Crash.crash $"PRecord pattern could not find record type '{scrutRecordName}' (pattern: '{patternRecordName}')" + + collectRecordFieldBindings (fun fieldName -> + match List.tryFind (fun (name, _) -> name = fieldName) recordFields with + | Some (_, typ) -> typ + | None -> Crash.crash $"PRecord pattern field '{fieldName}' not found on record '{patternRecordName}'") + | AST.TVar recordTypeVar -> + // Keep unresolved record field types unresolved instead of defaulting to Int64. + collectRecordFieldBindings (fun fieldName -> AST.TVar $"__record_field_{recordTypeVar}_{fieldName}") + | AST.TRuntimeError -> + collectRecordFieldBindings (fun fieldName -> AST.TVar $"__record_field_runtime_error_{fieldName}") + | _ -> + // Grouped alternatives may include impossible record branches + // (for example `(x, 2) | MyRecord { x = x }`). Treat those + // as contributing no bindings rather than crashing. + Map.empty + | AST.PConstructor (variantName, payloadPat) -> + match payloadPat with + | None -> Map.empty + | Some payloadPattern -> + let payloadType = + match Map.tryFind variantName variantLookup with + | Some (_, typeParams, _, Some payloadTypeTemplate) -> + match scrutType with + | AST.TSum (_, typeArgs) when List.length typeParams = List.length typeArgs -> + let subst = List.zip typeParams typeArgs |> Map.ofList + substituteType subst payloadTypeTemplate + | _ -> payloadTypeTemplate + | Some (_, _, _, None) -> + Crash.crash $"Constructor '{variantName}' has no payload type" + | None -> + Crash.crash $"Unknown constructor '{variantName}' in pattern" + extractPatternBindings payloadPattern payloadType + | AST.PList innerPats -> + let elemTypeOpt = + match scrutType with + | AST.TList t -> Some t + | AST.TVar _ + | AST.TRuntimeError -> Some (AST.TVar "__list_elem_unknown") + | _ -> None + match elemTypeOpt with + | None -> + // Grouped alternatives may include impossible list branches (for example `0 | [_]`). + // Treat those as contributing no bindings rather than crashing. + Map.empty + | Some elemType -> + innerPats + |> List.fold (fun acc pat -> Map.fold (fun m k v -> Map.add k v m) acc (extractPatternBindings pat elemType)) Map.empty + | AST.PListCons (headPats, tailPat) -> + let elemTypeOpt = + match scrutType with + | AST.TList t -> Some t + | AST.TVar _ + | AST.TRuntimeError -> Some (AST.TVar "__list_elem_unknown") + | _ -> None + match elemTypeOpt with + | None -> + // Impossible list-cons alternatives must not fabricate bindings. + Map.empty + | Some elemType -> + let headBindings = + headPats + |> List.fold (fun acc pat -> Map.fold (fun m k v -> Map.add k v m) acc (extractPatternBindings pat elemType)) Map.empty + let tailBindings = extractPatternBindings tailPat scrutType + Map.fold (fun m k v -> Map.add k v m) headBindings tailBindings + + let resolveCaseType (preferred: AST.Type) (other: AST.Type) : Result = + match matchTypePattern preferred other with + | Error _ -> Error "Match case type mismatch" + | Ok bindings -> + match consolidateTypeBindings bindings with + | Error e -> Error e + | Ok subst -> Ok (applySubstToType subst preferred) + + let mergeCaseTypes (accType: AST.Type) (nextType: AST.Type) : Result = + if accType = nextType then + Ok accType + elif accType = AST.TRuntimeError then + Ok nextType + elif nextType = AST.TRuntimeError then + Ok accType + else + match resolveCaseType accType nextType, resolveCaseType nextType accType with + | Ok resolvedAcc, Ok resolvedNext -> + if containsTypeVar resolvedAcc && not (containsTypeVar resolvedNext) then + Ok resolvedNext + elif containsTypeVar resolvedNext && not (containsTypeVar resolvedAcc) then + Ok resolvedAcc + else + Ok resolvedAcc + | Ok resolvedAcc, Error _ -> Ok resolvedAcc + | Error _, Ok resolvedNext -> Ok resolvedNext + | Error _, Error _ -> + Error + $"Match cases have incompatible types: {typeToString accType} vs {typeToString nextType}" + + let inferCaseType (patternType: AST.Type) (mc: AST.MatchCase) : Result = + let patBindings = + mc.Patterns + |> AST.NonEmptyList.toList + |> List.fold (fun acc pat -> Map.fold (fun m k v -> Map.add k v m) acc (extractPatternBindings pat patternType)) Map.empty + let typeEnv' = Map.fold (fun m k v -> Map.add k v m) typeEnv patBindings + inferType mc.Body typeEnv' typeReg variantLookup funcReg moduleRegistry + + let patternType = + match scrutineeTypeResult with + | Ok t -> t + | Error msg -> Crash.crash $"Pattern match: Could not determine scrutinee type: {msg}" + + match cases with + | [] -> Error "Empty match expression" + | firstCase :: restCases -> + inferCaseType patternType firstCase + |> Result.bind (fun firstCaseType -> + restCases + |> List.fold + (fun accResult mc -> + accResult + |> Result.bind (fun accType -> + inferCaseType patternType mc + |> Result.bind (fun nextType -> mergeCaseTypes accType nextType))) + (Ok firstCaseType)) + | AST.Call (funcName, args) -> + let argList = exprArgsToList args + if isBuiltinUnwrapName funcName then + match argList with + | [argExpr] -> + inferType argExpr typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun argType -> + match argType with + | AST.TSum ("Stdlib.Option.Option", [valueType]) -> Ok valueType + | AST.TSum ("Stdlib.Result.Result", [okType; _]) -> Ok okType + | AST.TSum ("Stdlib.Option.Option", []) -> + match argExpr with + | AST.Constructor (_, "Some", Some payloadExpr) -> + inferType payloadExpr typeEnv typeReg variantLookup funcReg moduleRegistry + | _ -> + // Type args may be unavailable in ANF inferType. + // Use Unit to avoid leaking unresolved type variables into later passes. + Ok AST.TUnit + | AST.TSum ("Stdlib.Result.Result", []) -> + match argExpr with + | AST.Constructor (_, "Ok", Some payloadExpr) -> + inferType payloadExpr typeEnv typeReg variantLookup funcReg moduleRegistry + | _ -> + // Type args may be unavailable in ANF inferType. + // Use Unit to avoid leaking unresolved type variables into later passes. + Ok AST.TUnit + | _ -> + Error $"Internal error: Builtin.unwrap expects Option/Result argument, got {typeToString argType}") + | _ -> + Error $"Internal error: Builtin.unwrap expects 1 argument, got {List.length argList}" + elif isBuiltinTestRuntimeErrorName funcName then + match argList with + // testRuntimeError behaves like bottom, but ANF-level inference must stay concrete. + | [_] -> Ok AST.TUnit + | _ -> + Error $"Internal error: Builtin.testRuntimeError expects 1 argument, got {List.length argList}" + else + // Look up function return type from the function registry + match Map.tryFind funcName funcReg with + | Some (AST.TFunction (_, returnType)) -> Ok returnType + | Some _ -> Error $"Expected function type for {funcName} in funcReg" + | None -> + // Check if it's a function parameter (variable with function type) + match Map.tryFind funcName typeEnv with + | Some (AST.TFunction (_, returnType)) -> Ok returnType + | _ -> + // Check if it's a module function (e.g., Stdlib.File.exists) + match Stdlib.tryGetFunctionWithFallback moduleRegistry funcName with + | Some (moduleFunc, _) -> Ok moduleFunc.ReturnType + | None -> + // Check if it's a monomorphized intrinsic (e.g., __raw_get_i64) + // These are raw memory operations that work with 8-byte values + if funcName.StartsWith("__raw_get_") then + // Preserve the monomorphized return type; defaulting to Int64 can + // incorrectly mark pattern-match branches as impossible. + let suffix = funcName.Substring("__raw_get_".Length) + tryParseMangledType variantLookup suffix + elif funcName.StartsWith("__raw_set_") then + // __raw_set returns Unit + Ok AST.TUnit + // Key intrinsics for Dict - monomorphized versions + elif funcName.StartsWith("__hash_") then + // __hash returns Int64 (hash value) + Ok AST.TInt64 + elif funcName.StartsWith("__key_eq_") then + // __key_eq returns Bool (equality check) + Ok AST.TBool + // Dict intrinsics - monomorphized versions + elif funcName.StartsWith("__empty_dict_") then + // __empty_dict returns Dict - but at ANF level it's Int64 (null ptr) + Ok AST.TInt64 + elif funcName.StartsWith("__dict_is_null_") then + // __dict_is_null returns Bool + Ok AST.TBool + elif funcName.StartsWith("__dict_get_tag_") then + // __dict_get_tag returns Int64 (tag bits) + Ok AST.TInt64 + elif funcName.StartsWith("__dict_to_rawptr_") then + // __dict_to_rawptr returns RawPtr (as Int64) + Ok AST.TInt64 + elif funcName.StartsWith("__rawptr_to_dict_") then + // __rawptr_to_dict returns Dict (as Int64) + Ok AST.TInt64 + // List intrinsics - monomorphized versions for Finger Tree + elif funcName.StartsWith("__list_is_null_") then + // __list_is_null returns Bool + Ok AST.TBool + elif funcName.StartsWith("__list_get_tag_") then + // __list_get_tag returns Int64 (tag bits) + Ok AST.TInt64 + elif funcName.StartsWith("__list_to_rawptr_") then + // __list_to_rawptr returns RawPtr (as Int64) + Ok AST.TInt64 + elif funcName.StartsWith("__rawptr_to_list_") then + // __rawptr_to_list returns List - parse element type from mangled name + let suffix = funcName.Substring("__rawptr_to_list_".Length) + tryParseMangledType variantLookup suffix + |> Result.map AST.TList + elif funcName.StartsWith("__list_empty_") then + // Preserve the semantic list type for match/type inference. + let suffix = funcName.Substring("__list_empty_".Length) + tryParseMangledType variantLookup suffix + |> Result.map AST.TList + else + Error $"Unknown function: '{funcName}'" + | AST.TypeApp (_funcName, _typeArgs, _args) -> + // Generic function call - not yet implemented + Error "Generic function calls not yet implemented" + | AST.Lambda (parameters, body) -> + // Lambda has function type (paramTypes) -> returnType + let paramTypes = parameters |> paramsToList |> List.map snd + let typeEnv' = parameters |> paramsToList |> List.fold (fun env (name, ty) -> Map.add name ty env) typeEnv + inferType body typeEnv' typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun returnType -> AST.TFunction (paramTypes, returnType)) + | AST.Apply (func, _args) -> + // Apply result is the return type of the function + inferType func typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun funcType -> + match funcType with + | AST.TFunction (_, returnType) -> Ok returnType + | _ -> Error "Apply requires a function type") + | AST.FuncRef name -> + // Function reference has the function's type + match Map.tryFind name funcReg with + | Some returnType -> Ok returnType + | None -> Error $"Cannot infer type: undefined function '{name}'" + | AST.Closure (funcName, _) -> + // Closure has function type (without the closure param) + match Map.tryFind funcName funcReg with + | Some (AST.TFunction (_ :: restParams, returnType)) -> + Ok (AST.TFunction (restParams, returnType)) + | Some funcType -> Ok funcType + | None -> Error $"Cannot infer type: undefined closure function '{funcName}'" + | AST.InterpolatedString _ -> + // Interpolated strings are always String type + Ok AST.TString + +/// Convert AST expression to ANF +/// env maps user variable names to ANF TempIds and their types +/// typeReg maps record type names to field definitions +/// variantLookup maps variant names to (type name, tag index) +/// funcReg maps function names to their return types +let rec toANF (expr: AST.Expr) (varGen: ANF.VarGen) (env: VarEnv) (typeReg: TypeRegistry) (variantLookup: VariantLookup) (funcReg: FunctionRegistry) (moduleRegistry: AST.ModuleRegistry) : Result = + match expr with + | AST.UnitLiteral -> + // Unit literal becomes return of unit value (represented as 0) + Ok (ANF.Return (ANF.UnitLiteral), varGen) + + | AST.Int64Literal n -> + // Integer literal (default Int64) + Ok (ANF.Return (ANF.IntLiteral (ANF.Int64 n)), varGen) + + | AST.Int128Literal n -> + Ok (ANF.Return (ANF.StringLiteral (int128ToCanonicalString n)), varGen) + + | AST.Int8Literal n -> + Ok (ANF.Return (ANF.IntLiteral (ANF.Int8 n)), varGen) + + | AST.Int16Literal n -> + Ok (ANF.Return (ANF.IntLiteral (ANF.Int16 n)), varGen) + + | AST.Int32Literal n -> + Ok (ANF.Return (ANF.IntLiteral (ANF.Int32 n)), varGen) + + | AST.UInt8Literal n -> + Ok (ANF.Return (ANF.IntLiteral (ANF.UInt8 n)), varGen) + + | AST.UInt16Literal n -> + Ok (ANF.Return (ANF.IntLiteral (ANF.UInt16 n)), varGen) + + | AST.UInt32Literal n -> + Ok (ANF.Return (ANF.IntLiteral (ANF.UInt32 n)), varGen) + + | AST.UInt64Literal n -> + Ok (ANF.Return (ANF.IntLiteral (ANF.UInt64 n)), varGen) + + | AST.UInt128Literal n -> + Ok (ANF.Return (ANF.StringLiteral (uint128ToCanonicalString n)), varGen) + + | AST.BoolLiteral b -> + // Boolean literal becomes return + Ok (ANF.Return (ANF.BoolLiteral b), varGen) + + | AST.StringLiteral s -> + // String literal becomes return + Ok (ANF.Return (ANF.StringLiteral s), varGen) + + | AST.CharLiteral s -> + // Char literal becomes return (stored as string, same runtime representation) + Ok (ANF.Return (ANF.StringLiteral s), varGen) + + | AST.FloatLiteral f -> + // Float literal becomes return + Ok (ANF.Return (ANF.FloatLiteral f), varGen) + + | AST.Var name -> + if isBuiltinTestNanName name then + Ok (ANF.Return (ANF.FloatLiteral System.Double.NaN), varGen) + else + // Variable reference: look up in environment + match tryLookupWithFallback name env with + | Some ((tempId, _), _) -> Ok (ANF.Return (ANF.Var tempId), varGen) + | None -> + // Check if it's a module function (e.g., Stdlib.Int64.add) + match Stdlib.tryGetFunctionWithFallback moduleRegistry name with + | Some (moduleFunc, resolvedName) -> + if List.isEmpty moduleFunc.ParamTypes then + // Legacy upstream compatibility: nullary stdlib functions are + // commonly used as values (without `()`), expecting evaluation. + toANF + (AST.Call (resolvedName, exprArgsFromList [])) + varGen + env + typeReg + variantLookup + funcReg + moduleRegistry + else + // Module function reference - wrap in closure for uniform calling convention + let (closureId, varGen') = ANF.freshVar varGen + let closureAlloc = ANF.ClosureAlloc (resolvedName, []) + Ok (ANF.Let (closureId, closureAlloc, ANF.Return (ANF.Var closureId)), varGen') + | None -> + // Check if it's a function reference (function name used as value) + match tryLookupWithFallback name funcReg with + | Some (funcType, resolvedName) -> + match funcType with + | AST.TFunction (paramTypes, _) when List.isEmpty paramTypes -> + // Legacy upstream compatibility for nullary functions. + toANF + (AST.Call (resolvedName, exprArgsFromList [])) + varGen + env + typeReg + variantLookup + funcReg + moduleRegistry + | _ -> + // Wrap in closure for uniform calling convention + let (closureId, varGen') = ANF.freshVar varGen + let closureAlloc = ANF.ClosureAlloc (resolvedName, []) + Ok (ANF.Let (closureId, closureAlloc, ANF.Return (ANF.Var closureId)), varGen') + | None -> + Error $"Undefined variable: {name}" + + | AST.FuncRef name -> + // Explicit function reference - wrap in closure for uniform calling convention + let (closureId, varGen') = ANF.freshVar varGen + let closureAlloc = ANF.ClosureAlloc (name, []) + Ok (ANF.Let (closureId, closureAlloc, ANF.Return (ANF.Var closureId)), varGen') + + | AST.Closure (funcName, captures) -> + // Closure: allocate closure tuple with function address and captured values + // Convert each capture expression to an atom + let rec convertCaptures (caps: AST.Expr list) (vg: ANF.VarGen) (acc: (ANF.Atom * (ANF.TempId * ANF.CExpr) list) list) = + match caps with + | [] -> Ok (List.rev acc, vg) + | cap :: rest -> + toAtom cap vg env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (capAtom, capBindings, vg') -> + convertCaptures rest vg' ((capAtom, capBindings) :: acc)) + convertCaptures captures varGen [] + |> Result.map (fun (captureResults, varGen1) -> + let captureAtoms = captureResults |> List.map fst + let allBindings = captureResults |> List.collect snd + // Generate ClosureAlloc: allocate closure tuple + let (closureId, varGen2) = ANF.freshVar varGen1 + let closureAlloc = ANF.ClosureAlloc (funcName, captureAtoms) + let finalExpr = ANF.Let (closureId, closureAlloc, ANF.Return (ANF.Var closureId)) + let exprWithBindings = wrapBindings allBindings finalExpr + (exprWithBindings, varGen2)) + + | AST.Let (name, value, body) -> + // Let binding: convert value to atom, allocate fresh temp, convert body with extended env + // Infer the type of the value for type-directed field lookup + let typeEnv = typeEnvFromVarEnv env + inferType value typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun valueType -> + // Try toAtom first; if it fails for complex expressions like Match, use toANF + match toAtom value varGen env typeReg variantLookup funcReg moduleRegistry with + | Ok (valueAtom, valueBindings, varGen1) -> + let (tempId, varGen2) = ANF.freshVar varGen1 + let env' = Map.add name (tempId, valueType) env + toANF body varGen2 env' typeReg variantLookup funcReg moduleRegistry |> Result.map (fun (bodyExpr, varGen3) -> + // Build: valueBindings + let tempId = valueAtom + body + let finalExpr = ANF.Let (tempId, ANF.Atom valueAtom, bodyExpr) + let exprWithBindings = wrapBindings valueBindings finalExpr + (exprWithBindings, varGen3)) + | Error _ -> + // Complex expression (like Match) - compile with toANF and transform returns + let (tempId, varGen1) = ANF.freshVar varGen + let env' = Map.add name (tempId, valueType) env + toANF value varGen1 env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (valueExpr, varGen2) -> + toANF body varGen2 env' typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, varGen3) -> + // Transform: replace all Returns in valueExpr with Let bindings to tempId + bodyExpr + let rec transformReturns expr = + match expr with + | ANF.Return atom -> ANF.Let (tempId, ANF.Atom atom, bodyExpr) + | ANF.Let (id, cexpr, rest) -> ANF.Let (id, cexpr, transformReturns rest) + | ANF.If (cond, thenBr, elseBr) -> + ANF.If (cond, transformReturns thenBr, transformReturns elseBr) + (transformReturns valueExpr, varGen3)))) + + | AST.UnaryOp (AST.Neg, innerExpr) -> + // Unary negation: use operand type to select float vs integer path + let typeEnv = typeEnvFromVarEnv env + inferType innerExpr typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun innerType -> + match innerType with + | AST.TFloat64 -> + match innerExpr with + | AST.FloatLiteral f -> + // Constant-fold negative float literals at compile time + Ok (ANF.Return (ANF.FloatLiteral (-f)), varGen) + | _ -> + toAtom innerExpr varGen env typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (innerAtom, innerBindings, varGen1) -> + let (tempVar, varGen2) = ANF.freshVar varGen1 + let cexpr = ANF.FloatNeg innerAtom + let finalExpr = ANF.Let (tempVar, cexpr, ANF.Return (ANF.Var tempVar)) + let exprWithBindings = wrapBindings innerBindings finalExpr + (exprWithBindings, varGen2)) + | AST.TInt64 -> + match innerExpr with + | AST.Int64Literal n when n = System.Int64.MinValue -> + // The lexer stores INT64_MIN as a sentinel for "9223372036854775808" + // When negated, it should remain INT64_MIN (mathematically correct) + Ok (ANF.Return (ANF.IntLiteral (ANF.Int64 System.Int64.MinValue)), varGen) + | _ -> + let zeroExpr = AST.Int64Literal 0L + toANF (AST.BinOp (AST.Sub, zeroExpr, innerExpr)) varGen env typeReg variantLookup funcReg moduleRegistry + | AST.TInt32 -> + let zeroExpr = AST.Int32Literal 0l + toANF (AST.BinOp (AST.Sub, zeroExpr, innerExpr)) varGen env typeReg variantLookup funcReg moduleRegistry + | AST.TInt16 -> + let zeroExpr = AST.Int16Literal 0s + toANF (AST.BinOp (AST.Sub, zeroExpr, innerExpr)) varGen env typeReg variantLookup funcReg moduleRegistry + | AST.TInt8 -> + let zeroExpr = AST.Int8Literal 0y + toANF (AST.BinOp (AST.Sub, zeroExpr, innerExpr)) varGen env typeReg variantLookup funcReg moduleRegistry + | AST.TUInt64 -> + let zeroExpr = AST.UInt64Literal 0UL + toANF (AST.BinOp (AST.Sub, zeroExpr, innerExpr)) varGen env typeReg variantLookup funcReg moduleRegistry + | AST.TUInt32 -> + let zeroExpr = AST.UInt32Literal 0ul + toANF (AST.BinOp (AST.Sub, zeroExpr, innerExpr)) varGen env typeReg variantLookup funcReg moduleRegistry + | AST.TUInt16 -> + let zeroExpr = AST.UInt16Literal 0us + toANF (AST.BinOp (AST.Sub, zeroExpr, innerExpr)) varGen env typeReg variantLookup funcReg moduleRegistry + | AST.TUInt8 -> + let zeroExpr = AST.UInt8Literal 0uy + toANF (AST.BinOp (AST.Sub, zeroExpr, innerExpr)) varGen env typeReg variantLookup funcReg moduleRegistry + | _ -> + Error $"Negation requires numeric operand, got {innerType}") + + | AST.UnaryOp (AST.Not, innerExpr) -> + // Boolean not: convert operand to atom and apply Not + toAtom innerExpr varGen env typeReg variantLookup funcReg moduleRegistry |> Result.map (fun (innerAtom, innerBindings, varGen1) -> + // Create unary op and bind to fresh variable + let (tempVar, varGen2) = ANF.freshVar varGen1 + let cexpr = ANF.UnaryPrim (ANF.Not, innerAtom) + + // Build the expression: innerBindings + let tempVar = op + let finalExpr = ANF.Let (tempVar, cexpr, ANF.Return (ANF.Var tempVar)) + let exprWithBindings = wrapBindings innerBindings finalExpr + + (exprWithBindings, varGen2)) + + | AST.UnaryOp (AST.BitNot, innerExpr) -> + // Bitwise NOT: convert operand to atom and apply BitNot + toAtom innerExpr varGen env typeReg variantLookup funcReg moduleRegistry |> Result.map (fun (innerAtom, innerBindings, varGen1) -> + // Create unary op and bind to fresh variable + let (tempVar, varGen2) = ANF.freshVar varGen1 + let cexpr = ANF.UnaryPrim (ANF.BitNot, innerAtom) + + // Build the expression: innerBindings + let tempVar = op + let finalExpr = ANF.Let (tempVar, cexpr, ANF.Return (ANF.Var tempVar)) + let exprWithBindings = wrapBindings innerBindings finalExpr + + (exprWithBindings, varGen2)) + + | AST.BinOp (op, left, right) -> + toANFBoundAtom left varGen env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (leftExpr, leftAtom, varGen1) -> + toANFBoundAtom right varGen1 env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (rightExpr, rightAtom, varGen2) -> + let typeEnv = typeEnvFromVarEnv env + let buildCoreExpr () : Result = + match op with + | AST.Eq | AST.Neq -> + // Infer type of left operand to check if structural comparison is needed + match inferType left typeEnv typeReg variantLookup funcReg moduleRegistry with + | Ok operandType when isCompoundType operandType -> + // Generate structural equality + let (eqBindings, eqResultAtom, varGen3) = + generateStructuralEquality leftAtom rightAtom operandType varGen2 typeReg variantLookup + // For Neq, negate the result + let (finalAtom, finalBindings, varGen4) = + if op = AST.Neq then + let (negVar, vg) = ANF.freshVar varGen3 + let negExpr = ANF.UnaryPrim (ANF.Not, eqResultAtom) + (ANF.Var negVar, eqBindings @ [(negVar, negExpr)], vg) + else + (eqResultAtom, eqBindings, varGen3) + Ok (wrapBindings finalBindings (ANF.Return finalAtom), varGen4) + | Ok AST.TString + | Ok AST.TChar + | Ok AST.TInt128 + | Ok AST.TUInt128 -> + // String/char/128-bit equality - call __string_eq. + // Int128/UInt128 values are lowered as canonical decimal strings. + let (tempVar, varGen3) = ANF.freshVar varGen2 + let cexpr = ANF.Call ("__string_eq", [leftAtom; rightAtom]) + // For Neq, negate the result + let (finalAtom, finalBindings, varGen4) = + if op = AST.Neq then + let (negVar, vg) = ANF.freshVar varGen3 + let negExpr = ANF.UnaryPrim (ANF.Not, ANF.Var tempVar) + (ANF.Var negVar, [(tempVar, cexpr); (negVar, negExpr)], vg) + else + (ANF.Var tempVar, [(tempVar, cexpr)], varGen3) + Ok (wrapBindings finalBindings (ANF.Return finalAtom), varGen4) + | _ -> + // Primitive type or type inference failed - use simple comparison + let (tempVar, varGen3) = ANF.freshVar varGen2 + let cexpr = ANF.Prim (convertBinOp op, leftAtom, rightAtom) + Ok (ANF.Let (tempVar, cexpr, ANF.Return (ANF.Var tempVar)), varGen3) + | AST.StringConcat -> + // String concatenation + let (tempVar, varGen3) = ANF.freshVar varGen2 + let cexpr = ANF.StringConcat (leftAtom, rightAtom) + Ok (ANF.Let (tempVar, cexpr, ANF.Return (ANF.Var tempVar)), varGen3) + // Arithmetic, bitwise, and comparison operators - use simple primitive + | AST.Add | AST.Sub | AST.Mul | AST.Div | AST.Mod + | AST.Shl | AST.Shr | AST.BitAnd | AST.BitOr | AST.BitXor + | AST.Lt | AST.Gt | AST.Lte | AST.Gte + | AST.And | AST.Or -> + let (tempVar, varGen3) = ANF.freshVar varGen2 + let cexpr = ANF.Prim (convertBinOp op, leftAtom, rightAtom) + Ok (ANF.Let (tempVar, cexpr, ANF.Return (ANF.Var tempVar)), varGen3) + + buildCoreExpr () + |> Result.map (fun (coreExpr, varGen3) -> + let withRight = bindReturns rightExpr (fun _ -> coreExpr) + let withLeft = bindReturns leftExpr (fun _ -> withRight) + (withLeft, varGen3)))) + + | AST.If (cond, thenBranch, elseBranch) -> + // If expression: convert condition to atom, both branches to ANF + // Try toAtom first; if it fails for complex expressions like Match, use toANF + match toAtom cond varGen env typeReg variantLookup funcReg moduleRegistry with + | Ok (condAtom, condBindings, varGen1) -> + toANF thenBranch varGen1 env typeReg variantLookup funcReg moduleRegistry |> Result.bind (fun (thenExpr, varGen2) -> + toANF elseBranch varGen2 env typeReg variantLookup funcReg moduleRegistry |> Result.map (fun (elseExpr, varGen3) -> + // Build the expression: condBindings + if condAtom then thenExpr else elseExpr + let finalExpr = ANF.If (condAtom, thenExpr, elseExpr) + let exprWithBindings = wrapBindings condBindings finalExpr + (exprWithBindings, varGen3))) + | Error _ -> + // Complex condition (like Match) - compile with toANF and transform + // Create: let condTemp = in if condTemp then else + let (condTemp, varGen1) = ANF.freshVar varGen + toANF cond varGen1 env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (condExpr, varGen2) -> + toANF thenBranch varGen2 env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (thenExpr, varGen3) -> + toANF elseBranch varGen3 env typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (elseExpr, varGen4) -> + // Transform: replace Returns in condExpr with Let + If + let ifExpr = ANF.If (ANF.Var condTemp, thenExpr, elseExpr) + let rec transformReturns expr = + match expr with + | ANF.Return atom -> ANF.Let (condTemp, ANF.Atom atom, ifExpr) + | ANF.Let (id, cexpr, rest) -> ANF.Let (id, cexpr, transformReturns rest) + | ANF.If (c, t, e) -> ANF.If (c, transformReturns t, transformReturns e) + (transformReturns condExpr, varGen4)))) + + | AST.Call (funcName, args) when isBuiltinUnwrapName funcName -> + let argList = exprArgsToList args + match argList with + | [argExpr] -> + let typeEnv = typeEnvFromVarEnv env + inferType argExpr typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun argType -> + let lookupVariantInfo (expectedTypeName: string) (variantName: string) : Result = + match Map.tryFind variantName variantLookup with + | Some (typeName, _, tag, payloadTypeOpt) when typeName = expectedTypeName -> + Ok (tag, payloadTypeOpt) + | Some (typeName, _, _, _) -> + Error $"Builtin.unwrap expected variant {variantName} in {expectedTypeName}, got {typeName}" + | None -> + Error $"Builtin.unwrap could not find variant tag for {expectedTypeName}.{variantName}" + + let buildUnwrapExpr (successTag: int) (payloadType: AST.Type) (failureMessage: string) : Result = + toAtom argExpr varGen env typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (argAtom0, argBindings0, vg1) -> + let (argAtom, argBindings, vg2) = + match argAtom0 with + | ANF.Var _ -> (argAtom0, argBindings0, vg1) + | _ -> + let (argVar, vg') = ANF.freshVar vg1 + (ANF.Var argVar, argBindings0 @ [(argVar, ANF.Atom argAtom0)], vg') + + let (tagVar, vg3) = ANF.freshVar vg2 + let (isSuccessVar, vg4) = ANF.freshVar vg3 + let tagBindings = [ + (tagVar, ANF.TupleGet (argAtom, 0)) + (isSuccessVar, ANF.Prim (ANF.Eq, ANF.Var tagVar, ANF.IntLiteral (ANF.Int64 (int64 successTag)))) + ] + + let normalizedPayloadType = + if containsTypeVar payloadType then AST.TUnit else payloadType + + let (payloadVar, vg5) = ANF.freshVar vg4 + let (typedPayloadVar, vg6) = ANF.freshVar vg5 + let thenBranch = + ANF.Let ( + payloadVar, + ANF.TupleGet (argAtom, 1), + ANF.Let ( + typedPayloadVar, + ANF.TypedAtom (ANF.Var payloadVar, normalizedPayloadType), + ANF.Return (ANF.Var typedPayloadVar) + ) + ) + + let (printVar, vg7) = ANF.freshVar vg6 + let elseBranch = + ANF.Let ( + printVar, + ANF.RuntimeError failureMessage, + ANF.Return ANF.UnitLiteral + ) + + let ifExpr = ANF.If (ANF.Var isSuccessVar, thenBranch, elseBranch) + let finalExpr = wrapBindings (argBindings @ tagBindings) ifExpr + (finalExpr, vg7)) + + match argType with + | AST.TSum ("Stdlib.Option.Option", [valueType]) -> + lookupVariantInfo "Stdlib.Option.Option" "Some" + |> Result.bind (fun (successTag, _) -> + buildUnwrapExpr successTag valueType "Cannot unwrap None") + | AST.TSum ("Stdlib.Option.Option", []) -> + lookupVariantInfo "Stdlib.Option.Option" "Some" + |> Result.bind (fun (successTag, payloadTypeOpt) -> + let payloadTypeResult = + match argExpr with + | AST.Constructor (_, "Some", Some payloadExpr) -> + inferType payloadExpr typeEnv typeReg variantLookup funcReg moduleRegistry + | _ -> + match payloadTypeOpt with + | Some payloadType -> Ok payloadType + | None -> Ok AST.TUnit + payloadTypeResult + |> Result.bind (fun payloadType -> + buildUnwrapExpr successTag payloadType "Cannot unwrap None")) + | AST.TSum ("Stdlib.Result.Result", [okType; _]) -> + lookupVariantInfo "Stdlib.Result.Result" "Ok" + |> Result.bind (fun (successTag, _) -> + let failureMessage = + match argExpr with + | AST.Constructor (_, "Error", Some payloadExpr) -> + match unwrapErrorPayloadToString payloadExpr with + | Some payloadText -> $"Cannot unwrap Error: {payloadText}" + | None -> "Cannot unwrap Error" + | _ -> + "Cannot unwrap Error" + buildUnwrapExpr successTag okType failureMessage) + | AST.TSum ("Stdlib.Result.Result", []) -> + lookupVariantInfo "Stdlib.Result.Result" "Ok" + |> Result.bind (fun (successTag, payloadTypeOpt) -> + let payloadTypeResult = + match argExpr with + | AST.Constructor (_, "Ok", Some payloadExpr) -> + inferType payloadExpr typeEnv typeReg variantLookup funcReg moduleRegistry + | _ -> + match payloadTypeOpt with + | Some payloadType -> Ok payloadType + | None -> Ok AST.TUnit + let failureMessage = + match argExpr with + | AST.Constructor (_, "Error", Some payloadExpr) -> + match unwrapErrorPayloadToString payloadExpr with + | Some payloadText -> $"Cannot unwrap Error: {payloadText}" + | None -> "Cannot unwrap Error" + | _ -> + "Cannot unwrap Error" + payloadTypeResult + |> Result.bind (fun payloadType -> + buildUnwrapExpr successTag payloadType failureMessage)) + | _ -> + Error $"Internal error: Builtin.unwrap should have been typechecked as Option/Result, got {typeToString argType}") + | _ -> + Error $"Internal error: Builtin.unwrap should have exactly 1 argument, got {List.length argList}" + + | AST.Call (funcName, args) when isBuiltinTestRuntimeErrorName funcName -> + let argList = exprArgsToList args + match argList with + | [messageExpr] -> + let messageText = + match unwrapErrorPayloadToString messageExpr with + | Some text -> text + | None -> "" + let fullMessage = $"Uncaught exception: {messageText}" + let (runtimeErrorVar, varGen1) = ANF.freshVar varGen + let runtimeErrorExpr = ANF.RuntimeError fullMessage + Ok (ANF.Let (runtimeErrorVar, runtimeErrorExpr, ANF.Return ANF.UnitLiteral), varGen1) + | _ -> + Error $"Internal error: Builtin.testRuntimeError should have exactly 1 argument, got {List.length argList}" + + | AST.Call (funcName, args) -> + // Function call: convert all arguments to atoms + // If an argument is a function reference, wrap it in a trivial closure for uniform calling convention + let argExprList = exprArgsToList args + + let wrapFuncRefInClosure (argExpr: ANF.AExpr) (atom: ANF.Atom) (vg: ANF.VarGen) : ANF.AExpr * ANF.Atom * ANF.VarGen = + match atom with + | ANF.FuncRef fnName -> + // Function reference needs to be wrapped in a closure. + let (closureId, vg') = ANF.freshVar vg + let closureExpr = ANF.Let (closureId, ANF.ClosureAlloc (fnName, []), ANF.Return (ANF.Var closureId)) + let wrappedExpr = bindReturns argExpr (fun _ -> closureExpr) + (wrappedExpr, ANF.Var closureId, vg') + | _ -> + (argExpr, atom, vg) + + let rec convertArgs + (argExprs: AST.Expr list) + (vg: ANF.VarGen) + (accExprs: ANF.AExpr list) + (accAtoms: ANF.Atom list) + : Result = + match argExprs with + | [] -> + Ok (List.rev accExprs, List.rev accAtoms, vg) + | arg :: rest -> + toANFBoundAtom arg vg env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (argExpr, argAtom, vg') -> + // Wrap function references in closures for uniform calling convention. + let (wrappedExpr, wrappedAtom, vg'') = wrapFuncRefInClosure argExpr argAtom vg' + convertArgs rest vg'' (wrappedExpr :: accExprs) (wrappedAtom :: accAtoms)) + + // Regular function call (including module functions like Stdlib.Int64.add) + convertArgs argExprList varGen [] [] + |> Result.bind (fun (argSetupExprs, argAtoms, varGen1) -> + // Bind call result to fresh variable + let (resultVar, varGen2) = ANF.freshVar varGen1 + let withArgSetups (finalExpr: ANF.AExpr) = + List.foldBack + (fun argExpr acc -> bindReturns argExpr (fun _ -> acc)) + argSetupExprs + finalExpr + // Check if funcName is a variable (indirect call) or a defined function (direct call) + match Map.tryFind funcName env with + | Some (tempId, AST.TFunction (paramTypes, _)) -> + // Variable with function type - use closure call + // All function values are now closures (even non-capturing ones) + let normalizedArgAtoms = normalizeSyntheticNullaryArgAtoms paramTypes argExprList argAtoms + let callExpr = ANF.ClosureCall (ANF.Var tempId, normalizedArgAtoms) + let finalExpr = ANF.Let (resultVar, callExpr, ANF.Return (ANF.Var resultVar)) + Ok (withArgSetups finalExpr, varGen2) + | Some (tempId, AST.TVar _) -> + // Higher-order generic values can remain unresolved (TVar) until + // surrounding inference finalizes concrete shapes. + let callExpr = ANF.ClosureCall (ANF.Var tempId, argAtoms) + let finalExpr = ANF.Let (resultVar, callExpr, ANF.Return (ANF.Var resultVar)) + Ok (withArgSetups finalExpr, varGen2) + | Some (_, varType) -> + // Variable exists but is not a function type + Error $"Cannot call '{funcName}' - it has type {varType}, not a function type" + | None -> + // Not a variable - check if it's a file intrinsic first + match tryFileIntrinsic funcName argAtoms with + | Some intrinsicExpr -> + // File I/O intrinsic call + let finalExpr = ANF.Let (resultVar, intrinsicExpr, ANF.Return (ANF.Var resultVar)) + Ok (withArgSetups finalExpr, varGen2) + | None -> + // Check if it's a raw memory intrinsic + match tryRawMemoryIntrinsic variantLookup funcName argAtoms with + | Some intrinsicExpr -> + // Raw memory intrinsic call + let finalExpr = ANF.Let (resultVar, intrinsicExpr, ANF.Return (ANF.Var resultVar)) + Ok (withArgSetups finalExpr, varGen2) + | None -> + // Check if it's a Float intrinsic + match tryFloatIntrinsic funcName argAtoms with + | Some intrinsicExpr -> + // Float intrinsic call + let finalExpr = ANF.Let (resultVar, intrinsicExpr, ANF.Return (ANF.Var resultVar)) + Ok (withArgSetups finalExpr, varGen2) + | None -> + // Check if it's a constant-fold intrinsic (Platform, Path) + match tryConstantFoldIntrinsic funcName argAtoms with + | Some intrinsicExpr -> + // Constant-folded intrinsic + let finalExpr = ANF.Let (resultVar, intrinsicExpr, ANF.Return (ANF.Var resultVar)) + Ok (withArgSetups finalExpr, varGen2) + | None -> + // Check if it's a random intrinsic + match tryRandomIntrinsic funcName argAtoms with + | Some intrinsicExpr -> + // Random intrinsic call + let finalExpr = ANF.Let (resultVar, intrinsicExpr, ANF.Return (ANF.Var resultVar)) + Ok (withArgSetups finalExpr, varGen2) + | None -> + // Check if it's a date intrinsic + match tryDateIntrinsic funcName argAtoms with + | Some intrinsicExpr -> + // Date intrinsic call + let finalExpr = ANF.Let (resultVar, intrinsicExpr, ANF.Return (ANF.Var resultVar)) + Ok (withArgSetups finalExpr, varGen2) + | None -> + // Check if it's a defined function + match Map.tryFind funcName funcReg with + | Some (AST.TFunction (paramTypes, _)) -> + // Direct call to defined function + let normalizedArgAtoms = normalizeSyntheticNullaryArgAtoms paramTypes argExprList argAtoms + let callExpr = ANF.Call (funcName, normalizedArgAtoms) + let finalExpr = ANF.Let (resultVar, callExpr, ANF.Return (ANF.Var resultVar)) + Ok (withArgSetups finalExpr, varGen2) + | Some _ -> + // Preserve existing behavior for malformed registry entries. + let callExpr = ANF.Call (funcName, argAtoms) + let finalExpr = ANF.Let (resultVar, callExpr, ANF.Return (ANF.Var resultVar)) + Ok (withArgSetups finalExpr, varGen2) + | None -> + // Unknown function - could be error or forward reference + // For now, assume it's a valid function (will fail at link time if not) + let callExpr = ANF.Call (funcName, argAtoms) + let finalExpr = ANF.Let (resultVar, callExpr, ANF.Return (ANF.Var resultVar)) + Ok (withArgSetups finalExpr, varGen2)) + + | AST.TypeApp (_funcName, _typeArgs, _args) -> + // Generic function call - not yet implemented + Error "Generic function calls not yet implemented" + + | AST.TupleLiteral elements -> + // Convert all elements to bound atoms so tuple elements can include expressions + // that cannot be lowered directly with toAtom (for example Builtin.testRuntimeError). + let rec convertElements + (elems: AST.Expr list) + (vg: ANF.VarGen) + (accExprs: ANF.AExpr list) + (accAtoms: ANF.Atom list) + : Result = + match elems with + | [] -> Ok (List.rev accExprs, List.rev accAtoms, vg) + | elem :: rest -> + toANFBoundAtom elem vg env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (elemExpr, elemAtom, vg') -> + convertElements rest vg' (elemExpr :: accExprs) (elemAtom :: accAtoms)) + + convertElements elements varGen [] [] + |> Result.map (fun (elemExprs, elemAtoms, varGen1) -> + // Create TupleAlloc and bind to fresh variable + let (resultVar, varGen2) = ANF.freshVar varGen1 + let tupleExpr = ANF.TupleAlloc elemAtoms + let tupleAllocExpr = ANF.Let (resultVar, tupleExpr, ANF.Return (ANF.Var resultVar)) + let exprWithSetups = + List.foldBack + (fun elemExpr acc -> bindReturns elemExpr (fun _ -> acc)) + elemExprs + tupleAllocExpr + + (exprWithSetups, varGen2)) + + | AST.TupleAccess (tupleExpr, index) -> + // Convert tuple to atom and create TupleGet + toAtom tupleExpr varGen env typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (tupleAtom, tupleBindings, varGen1) -> + let (resultVar, varGen2) = ANF.freshVar varGen1 + let getExpr = ANF.TupleGet (tupleAtom, index) + let finalExpr = ANF.Let (resultVar, getExpr, ANF.Return (ANF.Var resultVar)) + let exprWithBindings = wrapBindings tupleBindings finalExpr + + (exprWithBindings, varGen2)) + + | AST.RecordLiteral (typeName, fields) -> + // Records are compiled like tuples - allocate heap space and store fields + // Get field order from type registry (or use order from literal if anonymous) + let fieldOrder = + if typeName = "" then + fields |> List.map fst // Use literal order for anonymous records + else + match Map.tryFind typeName typeReg with + | Some typeFields -> typeFields |> List.map fst + | None -> Crash.crash $"Record type '{typeName}' not found in typeReg" + + // Reorder field values according to type definition order + let fieldMap = Map.ofList fields + let orderedValues = + fieldOrder + |> List.choose (fun fname -> Map.tryFind fname fieldMap) + + // Convert to TupleLiteral and reuse tuple handling + toANF (AST.TupleLiteral orderedValues) varGen env typeReg variantLookup funcReg moduleRegistry + + | AST.RecordUpdate (recordExpr, updates) -> + // Record update: { record with field1 = val1, field2 = val2 } + // Desugar to creating a new record with updated fields + let typeEnv = typeEnvFromVarEnv env + inferType recordExpr typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun recordType -> + match recordType with + | AST.TRecord (typeName, _) -> + match Map.tryFind typeName typeReg with + | Some typeFields -> + // Build a map of updates + let updateMap = Map.ofList updates + // For each field in the type, use update value or access from original record + let newFields = + typeFields + |> List.map (fun (fname, _) -> + match Map.tryFind fname updateMap with + | Some updateExpr -> (fname, updateExpr) + | None -> (fname, AST.RecordAccess (recordExpr, fname))) + // Create a new record literal with the combined fields + toANF (AST.RecordLiteral (typeName, newFields)) varGen env typeReg variantLookup funcReg moduleRegistry + | None -> + Error $"Unknown record type: {typeName}" + | _ -> + Error "Cannot use record update syntax on non-record type") + + | AST.RecordAccess (recordExpr, fieldName) -> + // Records are compiled like tuples - field access becomes TupleGet + // Use type-directed lookup: infer the record type, then find field index + let typeEnv = typeEnvFromVarEnv env + inferType recordExpr typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun recordType -> + match recordType with + | AST.TRecord (typeName, _) -> + // Look up field index in the specific record type + match Map.tryFind typeName typeReg with + | Some fields -> + match List.tryFindIndex (fun (name, _) -> name = fieldName) fields with + | Some index -> + toAtom recordExpr varGen env typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (recordAtom, recordBindings, varGen1) -> + let (resultVar, varGen2) = ANF.freshVar varGen1 + let getExpr = ANF.TupleGet (recordAtom, index) + let finalExpr = ANF.Let (resultVar, getExpr, ANF.Return (ANF.Var resultVar)) + let exprWithBindings = wrapBindings recordBindings finalExpr + (exprWithBindings, varGen2)) + | None -> + Error $"Record type '{typeName}' has no field '{fieldName}'" + | None -> + Error $"Unknown record type: {typeName}" + | _ -> + Error $"Cannot access field '{fieldName}' on non-record type") + + | AST.Constructor (_, variantName, payload) -> + match Map.tryFind variantName variantLookup with + | None -> + Error $"Unknown constructor: {variantName}" + | Some (typeName, _, tag, _) -> + // Check if ANY variant in this type has a payload + // If so, all variants must be heap-allocated for consistency + // Note: We get typeName from variantLookup, not from AST (which may be empty) + let typeHasPayloadVariants = + variantLookup + |> Map.exists (fun _ (tName, _, _, pType) -> tName = typeName && pType.IsSome) + + match payload with + | None when not typeHasPayloadVariants -> + // Pure enum type (no payloads anywhere): return tag as an integer + Ok (ANF.Return (ANF.IntLiteral (ANF.Int64 (int64 tag))), varGen) + | None -> + // No payload but type has other variants with payloads + // Heap-allocate as [tag, 0] for uniform 2-element structure + // This enables consistent structural equality comparison + let tagAtom = ANF.IntLiteral (ANF.Int64 (int64 tag)) + let dummyPayload = ANF.IntLiteral (ANF.Int64 0L) + let (resultVar, varGen1) = ANF.freshVar varGen + let tupleExpr = ANF.TupleAlloc [tagAtom; dummyPayload] + let finalExpr = ANF.Let (resultVar, tupleExpr, ANF.Return (ANF.Var resultVar)) + Ok (finalExpr, varGen1) + | Some payloadExpr -> + // Variant with payload: allocate [tag, payload] on heap + toAtom payloadExpr varGen env typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (payloadAtom, payloadBindings, varGen1) -> + let tagAtom = ANF.IntLiteral (ANF.Int64 (int64 tag)) + // Create TupleAlloc [tag, payload] and bind to fresh variable + let (resultVar, varGen2) = ANF.freshVar varGen1 + let tupleExpr = ANF.TupleAlloc [tagAtom; payloadAtom] + let finalExpr = ANF.Let (resultVar, tupleExpr, ANF.Return (ANF.Var resultVar)) + let exprWithBindings = wrapBindings payloadBindings finalExpr + (exprWithBindings, varGen2)) + + | AST.ListLiteral elements -> + // Compile list literal as FingerTree + // Tags: EMPTY=0, SINGLE=1, DEEP=2, NODE2=3, NODE3=4, LEAF=5 + // DEEP layout: [measure:8][prefixCount:8][p0:8][p1:8][p2:8][p3:8][middle:8][suffixCount:8][s0:8][s1:8][s2:8][s3:8] + + // Increment refcount for heap elements stored in leaves + let addLeafInc (elemAtom: ANF.Atom) (elemType: AST.Type) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + match elemAtom with + | ANF.Var _ when ANF.isHeapType elemType -> + let size = ANF.payloadSize elemType typeReg + let kind = ANF.rcKind elemType + let (incVar, vg1) = ANF.freshVar vg + let incExpr = ANF.RefCountInc (elemAtom, size, kind) + (vg1, bindings @ [(incVar, incExpr)]) + | _ -> + (vg, bindings) + + let listNode = AST.TList (AST.TVar "a") + let listNodeType = Some listNode + + // Tag a raw pointer as a list value without routing through Stdlib wrappers. + // Keep a typed binding so RC/type inference still treats the result as List. + let tagRawPtrAsList (tag: int64) (ptrVar: ANF.TempId) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + let (taggedRawVar, vg1) = ANF.freshVar vg + let tagExpr = ANF.Prim (ANF.BitOr, ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 tag)) + let (taggedVar, vg2) = ANF.freshVar vg1 + let typedExpr = ANF.TypedAtom (ANF.Var taggedRawVar, listNode) + (ANF.Var taggedVar, bindings @ [(taggedRawVar, tagExpr); (taggedVar, typedExpr)], vg2) + + // Helper to create a LEAF node wrapping an element + let allocLeaf (elemAtom: ANF.Atom) (elemType: AST.Type) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + let (ptrVar, vg1) = ANF.freshVar vg + let (setVar, vg2) = ANF.freshVar vg1 + let (setRcVar, vg3) = ANF.freshVar vg2 + let allocExpr = ANF.RawAlloc (ANF.IntLiteral (ANF.Int64 16L)) + let setExpr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 0L), elemAtom, None) + let setRcExpr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 8L), ANF.IntLiteral (ANF.Int64 1L), None) + let (vg4, bindings4) = + addLeafInc elemAtom elemType vg3 (bindings @ [(ptrVar, allocExpr); (setVar, setExpr); (setRcVar, setRcExpr)]) + tagRawPtrAsList 5L ptrVar vg4 bindings4 + + // Helper to create a SINGLE node containing a TreeNode + let allocSingle (nodeAtom: ANF.Atom) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + let (ptrVar, vg1) = ANF.freshVar vg + let (setVar, vg2) = ANF.freshVar vg1 + let (setRcVar, vg3) = ANF.freshVar vg2 + let allocExpr = ANF.RawAlloc (ANF.IntLiteral (ANF.Int64 16L)) + let setExpr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 0L), nodeAtom, listNodeType) + let setRcExpr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 8L), ANF.IntLiteral (ANF.Int64 1L), None) + let bindings1 = bindings @ [(ptrVar, allocExpr); (setVar, setExpr); (setRcVar, setRcExpr)] + tagRawPtrAsList 1L ptrVar vg3 bindings1 + + // Helper to create a DEEP node + let allocDeep (measure: int) (prefixNodes: ANF.Atom list) (middle: ANF.Atom) (suffixNodes: ANF.Atom list) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + let prefixCount = List.length prefixNodes + let suffixCount = List.length suffixNodes + let (ptrVar, vg1) = ANF.freshVar vg + let allocExpr = ANF.RawAlloc (ANF.IntLiteral (ANF.Int64 104L)) // 12 fields * 8 bytes + refcount + + // Build all the set operations + let setAt offset value valueType vg bindings = + let (setVar, vg') = ANF.freshVar vg + let setExpr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 (int64 offset)), value, valueType) + (vg', bindings @ [(setVar, setExpr)]) + + let (vg2, bindings2) = setAt 0 (ANF.IntLiteral (ANF.Int64 (int64 measure))) None vg1 (bindings @ [(ptrVar, allocExpr)]) + let (vg3, bindings3) = setAt 8 (ANF.IntLiteral (ANF.Int64 (int64 prefixCount))) None vg2 bindings2 + + // Set prefix nodes (p0-p3 at offsets 16, 24, 32, 40) + let rec setPrefix nodes offset vg bindings = + match nodes with + | [] -> (vg, bindings) + | n :: rest -> + let (vg', bindings') = setAt offset n listNodeType vg bindings + setPrefix rest (offset + 8) vg' bindings' + let (vg4, bindings4) = setPrefix prefixNodes 16 vg3 bindings3 + + // Set middle at offset 48 (type-uniform: another FingerTree of nodes) + let (vg5, bindings5) = setAt 48 middle listNodeType vg4 bindings4 + + // Set suffix count at offset 56 + let (vg6, bindings6) = setAt 56 (ANF.IntLiteral (ANF.Int64 (int64 suffixCount))) None vg5 bindings5 + + // Set suffix nodes (s0-s3 at offsets 64, 72, 80, 88) + let (vg7, bindings7) = setPrefix suffixNodes 64 vg6 bindings6 + + // Set refcount at offset 96 + let (vg8, bindings8) = setAt 96 (ANF.IntLiteral (ANF.Int64 1L)) None vg7 bindings7 + + // Tag with DEEP (2) + tagRawPtrAsList 2L ptrVar vg8 bindings8 + + // Build FingerTree nodes for middle spines without using pushBack. + let emptyTree = ANF.IntLiteral (ANF.Int64 0L) + + let nodeAtom (node: ANF.Atom, _measure: int) = node + let nodeMeasure (_node: ANF.Atom, measure: int) = measure + + // Helper to create a NODE2 (tag 3): [child0:8][child1:8][measure:8] + let allocNode2 (left: ANF.Atom * int) (right: ANF.Atom * int) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + let (ptrVar, vg1) = ANF.freshVar vg + let allocExpr = ANF.RawAlloc (ANF.IntLiteral (ANF.Int64 32L)) + let (set0Var, vg2) = ANF.freshVar vg1 + let set0Expr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 0L), nodeAtom left, listNodeType) + let (set1Var, vg3) = ANF.freshVar vg2 + let set1Expr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 8L), nodeAtom right, listNodeType) + let measure = nodeMeasure left + nodeMeasure right + let (set2Var, vg4) = ANF.freshVar vg3 + let set2Expr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 16L), ANF.IntLiteral (ANF.Int64 (int64 measure)), None) + let (setRcVar, vg5) = ANF.freshVar vg4 + let setRcExpr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 24L), ANF.IntLiteral (ANF.Int64 1L), None) + let bindings1 = + bindings + @ [(ptrVar, allocExpr); (set0Var, set0Expr); (set1Var, set1Expr); (set2Var, set2Expr); (setRcVar, setRcExpr)] + let (taggedNode, bindings2, vg6) = tagRawPtrAsList 3L ptrVar vg5 bindings1 + ((taggedNode, measure), bindings2, vg6) + + // Helper to create a NODE3 (tag 4): [child0:8][child1:8][child2:8][measure:8] + let allocNode3 (first: ANF.Atom * int) (second: ANF.Atom * int) (third: ANF.Atom * int) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + let (ptrVar, vg1) = ANF.freshVar vg + let allocExpr = ANF.RawAlloc (ANF.IntLiteral (ANF.Int64 40L)) + let (set0Var, vg2) = ANF.freshVar vg1 + let set0Expr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 0L), nodeAtom first, listNodeType) + let (set1Var, vg3) = ANF.freshVar vg2 + let set1Expr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 8L), nodeAtom second, listNodeType) + let (set2Var, vg4) = ANF.freshVar vg3 + let set2Expr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 16L), nodeAtom third, listNodeType) + let measure = nodeMeasure first + nodeMeasure second + nodeMeasure third + let (set3Var, vg5) = ANF.freshVar vg4 + let set3Expr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 24L), ANF.IntLiteral (ANF.Int64 (int64 measure)), None) + let (setRcVar, vg6) = ANF.freshVar vg5 + let setRcExpr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 32L), ANF.IntLiteral (ANF.Int64 1L), None) + let bindings1 = + bindings + @ [(ptrVar, allocExpr); (set0Var, set0Expr); (set1Var, set1Expr); (set2Var, set2Expr); (set3Var, set3Expr); (setRcVar, setRcExpr)] + let (taggedNode, bindings2, vg7) = tagRawPtrAsList 4L ptrVar vg6 bindings1 + ((taggedNode, measure), bindings2, vg7) + + let splitAt count nodes = + let rec loop remaining acc rest = + match remaining, rest with + | 0, _ -> Ok (List.rev acc, rest) + | _, [] -> Error "List literal: not enough nodes for split" + | n, x :: xs -> loop (n - 1) (x :: acc) xs + loop count [] nodes + + let groupSizes nodeCount = + if nodeCount < 2 then + Error "List literal: middle spine needs at least 2 nodes" + else + match nodeCount % 3 with + | 0 -> Ok (List.replicate (nodeCount / 3) 3) + | 1 -> + if nodeCount < 4 then + Error "List literal: invalid middle spine size" + else + Ok (2 :: 2 :: List.replicate ((nodeCount - 4) / 3) 3) + | _ -> + Ok (2 :: List.replicate ((nodeCount - 2) / 3) 3) + + let rec buildGroupedNodes sizes nodes vg bindings acc = + match sizes with + | [] -> Ok (List.rev acc, bindings, vg) + | size :: rest -> + splitAt size nodes + |> Result.bind (fun (group, remaining) -> + match size, group with + | 2, [a; b] -> + let (nodeInfo, bindings1, vg1) = allocNode2 a b vg bindings + buildGroupedNodes rest remaining vg1 bindings1 (nodeInfo :: acc) + | 3, [a; b; c] -> + let (nodeInfo, bindings1, vg1) = allocNode3 a b c vg bindings + buildGroupedNodes rest remaining vg1 bindings1 (nodeInfo :: acc) + | _ -> + Error $"List literal: unexpected group size {size}") + + let rec buildTree (nodes: (ANF.Atom * int) list) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + let nodeCount = List.length nodes + match nodes with + | [] -> Ok (emptyTree, bindings, vg) + | [single] -> + let (resultAtom, resultBindings, vg1) = allocSingle (nodeAtom single) vg bindings + Ok (resultAtom, resultBindings, vg1) + | first :: rest when nodeCount <= 5 -> + let totalMeasure = nodes |> List.sumBy nodeMeasure + let prefixNodes = [nodeAtom first] + let suffixNodes = rest |> List.map nodeAtom + let (resultAtom, resultBindings, vg1) = allocDeep totalMeasure prefixNodes emptyTree suffixNodes vg bindings + Ok (resultAtom, resultBindings, vg1) + | _ -> + splitAt 2 nodes + |> Result.bind (fun (prefixNodes, rest) -> + let restLength = List.length rest + let middleCount = restLength - 2 + splitAt middleCount rest + |> Result.bind (fun (middleNodes, suffixNodes) -> + groupSizes (List.length middleNodes) + |> Result.bind (fun sizes -> + buildGroupedNodes sizes middleNodes vg bindings [] + |> Result.bind (fun (groupedMiddle, bindings1, vg1) -> + buildTree groupedMiddle vg1 bindings1 + |> Result.map (fun (middleTree, bindings2, vg2) -> + let totalMeasure = nodes |> List.sumBy nodeMeasure + let prefixAtoms = prefixNodes |> List.map nodeAtom + let suffixAtoms = suffixNodes |> List.map nodeAtom + let (resultAtom, resultBindings, vg3) = + allocDeep totalMeasure prefixAtoms middleTree suffixAtoms vg2 bindings2 + (resultAtom, resultBindings, vg3)))))) + + if List.isEmpty elements then + // Empty list is EMPTY (represented as 0) + Ok (ANF.Return (ANF.IntLiteral (ANF.Int64 0L)), varGen) + else + let typeEnv = typeEnvFromVarEnv env + + // Convert all elements to atoms first + let rec convertElements (elems: AST.Expr list) (vg: ANF.VarGen) (acc: (ANF.Atom * AST.Type * (ANF.TempId * ANF.CExpr) list) list) = + match elems with + | [] -> Ok (List.rev acc, vg) + | e :: rest -> + inferType e typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun elemType -> + toAtom e vg env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (atom, bindings, vg') -> + convertElements rest vg' ((atom, elemType, bindings) :: acc))) + + convertElements elements varGen [] + |> Result.bind (fun (atomsWithBindings, varGen1) -> + // Flatten all element bindings + let elemBindings = atomsWithBindings |> List.collect (fun (_, _, bindings) -> bindings) + let elemAtoms = atomsWithBindings |> List.map (fun (atom, elemType, _) -> (atom, elemType)) + + // Create LEAF nodes for all elements + let rec createLeaves (atoms: (ANF.Atom * AST.Type) list) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) (acc: ANF.Atom list) = + match atoms with + | [] -> (List.rev acc, bindings, vg) + | (a, elemType) :: rest -> + let (leafAtom, bindings', vg') = allocLeaf a elemType vg bindings + createLeaves rest vg' bindings' (leafAtom :: acc) + + let (leafAtoms, leafBindings, varGen2) = createLeaves elemAtoms varGen1 elemBindings [] + let leafNodes = leafAtoms |> List.map (fun atom -> (atom, 1)) + + buildTree leafNodes varGen2 leafBindings + |> Result.map (fun (resultAtom, resultBindings, varGen3) -> + let finalExpr = ANF.Return resultAtom + let exprWithBindings = wrapBindings resultBindings finalExpr + (exprWithBindings, varGen3))) + + | AST.ListCons (headElements, tail) -> + // Compile list cons: [a, b, ...tail] prepends elements to tail + // Use Stdlib.__FingerTree.push to prepend each element + toAtom tail varGen env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (tailAtom, tailBindings, varGen1) -> + // Build list by prepending elements from right to left + // [a, b, ...tail] means push(push(tail, b), a) + let rec buildList (elems: AST.Expr list) (vg: ANF.VarGen) (currentList: ANF.Atom) (allBindings: (ANF.TempId * ANF.CExpr) list) : Result = + match elems with + | [] -> Ok (currentList, allBindings, vg) + | elem :: rest -> + // First build the rest of the list, then prepend this element + buildList rest vg currentList allBindings + |> Result.bind (fun (restList, restBindings, vg1) -> + toAtom elem vg1 env typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (elemAtom, elemBindings, vg2) -> + let (pushVar, vg3) = ANF.freshVar vg2 + // Call Stdlib.__FingerTree.push to prepend element + let pushExpr = ANF.Call ("Stdlib.__FingerTree.push_i64", [restList; elemAtom]) + let newBindings = restBindings @ elemBindings @ [(pushVar, pushExpr)] + (ANF.Var pushVar, newBindings, vg3))) + + if List.isEmpty headElements then + // No head elements, just return tail + let finalExpr = ANF.Return tailAtom + let exprWithBindings = wrapBindings tailBindings finalExpr + Ok (exprWithBindings, varGen1) + else + // Build the list by pushing elements + buildList headElements varGen1 tailAtom tailBindings + |> Result.map (fun (listAtom, listBindings, varGen2) -> + let finalExpr = ANF.Return listAtom + let exprWithBindings = wrapBindings listBindings finalExpr + (exprWithBindings, varGen2))) + + | AST.Match (scrutinee, cases) -> + // Infer scrutinee type to pass to pattern extraction for correct typing + let typeEnv = typeEnvFromVarEnv env + match inferType scrutinee typeEnv typeReg variantLookup funcReg moduleRegistry with + | Error msg -> Error $"Match scrutinee type inference failed: {msg}" + | Ok scrutType -> + // Compile match to if-else chain + // First convert scrutinee to a bound atom. This supports effectful/complex + // scrutinees such as Builtin.testRuntimeError(...) that cannot be lowered via toAtom. + toANFBoundAtom scrutinee varGen env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (scrutineeExpr, scrutineeAtom, varGen1) -> + // Check if any pattern needs to access list structure + // If so, we must ensure scrutinee is a variable (can't TupleGet on literal) + let hasNonEmptyListPattern = + cases |> List.exists (fun mc -> + mc.Patterns |> AST.NonEmptyList.toList |> List.exists (fun pat -> + match pat with + | AST.PList (_ :: _) -> true + | AST.PListCons (_ :: _, _) -> true // [h, ...t] also needs list access + | _ -> false)) + + // If there are non-empty list patterns, bind the scrutinee to a variable + let (scrutineeAtom', scrutineePostBindings, varGen1') = + match scrutineeAtom with + | ANF.Var _ -> (scrutineeAtom, [], varGen1) + | _ when hasNonEmptyListPattern -> + let (tempVar, vg) = ANF.freshVar varGen1 + (ANF.Var tempVar, [(tempVar, ANF.Atom scrutineeAtom)], vg) + | _ -> (scrutineeAtom, [], varGen1) + + // Check if the TYPE that a variant belongs to has any variant with a payload + // This determines if values are heap-allocated or simple integers + let typeHasAnyPayload (variantName: string) : bool = + match Map.tryFind variantName variantLookup with + | Some (typeName, _, _, _) -> + variantLookup + |> Map.exists (fun _ (tName, _, _, pType) -> tName = typeName && pType.IsSome) + | None -> false + + // Check if pattern always matches (wildcard or variable) + let rec patternAlwaysMatches (pattern: AST.Pattern) : bool = + match pattern with + | AST.PUnit -> true + | AST.PWildcard -> true + | AST.PVar _ -> true + | _ -> false + + // Extract pattern bindings and compile body with extended environment + // scrutType is the type of the scrutinee, used to determine correct types for pattern variables + let rec extractAndCompileBody (pattern: AST.Pattern) (body: AST.Expr) (scrutAtom: ANF.Atom) (scrutType: AST.Type) (currentEnv: VarEnv) (vg: ANF.VarGen) : Result = + match pattern with + | AST.PUnit -> toANF body vg currentEnv typeReg variantLookup funcReg moduleRegistry + | AST.PWildcard -> toANF body vg currentEnv typeReg variantLookup funcReg moduleRegistry + | AST.PInt64 _ | AST.PInt128Literal _ + | AST.PInt8Literal _ + | AST.PInt16Literal _ + | AST.PInt32Literal _ + | AST.PUInt8Literal _ + | AST.PUInt16Literal _ + | AST.PUInt32Literal _ + | AST.PUInt64Literal _ | AST.PUInt128Literal _ -> + toANF body vg currentEnv typeReg variantLookup funcReg moduleRegistry + | AST.PBool _ -> toANF body vg currentEnv typeReg variantLookup funcReg moduleRegistry + | AST.PString _ -> toANF body vg currentEnv typeReg variantLookup funcReg moduleRegistry + | AST.PChar _ -> toANF body vg currentEnv typeReg variantLookup funcReg moduleRegistry + | AST.PFloat _ -> toANF body vg currentEnv typeReg variantLookup funcReg moduleRegistry + | AST.PVar name -> + // Bind scrutinee to variable name with the correct type + let (tempId, vg1) = ANF.freshVar vg + let env' = Map.add name (tempId, scrutType) currentEnv + toANF body vg1 env' typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg2) -> + let expr = ANF.Let (tempId, ANF.Atom scrutAtom, bodyExpr) + (expr, vg2)) + | AST.PConstructor (constructorName, payloadPattern) -> + match payloadPattern with + | None -> toANF body vg currentEnv typeReg variantLookup funcReg moduleRegistry + | Some innerPattern -> + match Map.tryFind constructorName variantLookup with + | Some (_, _, _, None) -> + // Constructor arity mismatch behaves as non-matching. + // Do not introduce payload bindings in this branch body. + toANF body vg currentEnv typeReg variantLookup funcReg moduleRegistry + | Some (_, typeParams, _, Some payloadTypeTemplate) -> + // Extract payload from heap-allocated variant + // Variant layout: [tag:8][payload:8], so payload is at index 1 + let (payloadVar, vg1) = ANF.freshVar vg + let (typedPayloadVar, vg2) = ANF.freshVar vg1 + let payloadExpr = ANF.TupleGet (scrutAtom, 1) + // Apply type substitution if scrutType has type args + let payloadType = + match scrutType with + | AST.TSum (_, typeArgs) when List.length typeParams = List.length typeArgs -> + let subst = List.zip typeParams typeArgs |> Map.ofList + let rec substitute t = + match t with + | AST.TVar name -> Map.tryFind name subst |> Option.defaultValue t + | AST.TTuple elems -> AST.TTuple (List.map substitute elems) + | AST.TList elem -> AST.TList (substitute elem) + | AST.TDict (k, v) -> AST.TDict (substitute k, substitute v) + | AST.TSum (name, args) -> AST.TSum (name, List.map substitute args) + | AST.TFunction (args, ret) -> AST.TFunction (List.map substitute args, substitute ret) + | _ -> t + substitute payloadTypeTemplate + | _ -> payloadTypeTemplate + let typedPayloadExpr = ANF.TypedAtom (ANF.Var payloadVar, payloadType) + extractAndCompileBody innerPattern body (ANF.Var typedPayloadVar) payloadType currentEnv vg2 + |> Result.map (fun (innerExpr, vg3) -> + let expr = ANF.Let (payloadVar, payloadExpr, ANF.Let (typedPayloadVar, typedPayloadExpr, innerExpr)) + (expr, vg3)) + | None -> + Error $"Constructor '{constructorName}' not found in variant lookup" + | AST.PTuple patterns -> + // Recursively collect all variable bindings from a pattern + // Returns: updated env, list of bindings, updated vargen + // sourceType is the type of the source being matched, used to get correct element types + let rec collectPatternBindings (pat: AST.Pattern) (sourceAtom: ANF.Atom) (sourceType: AST.Type) (env: VarEnv) (bindings: (ANF.TempId * ANF.CExpr) list) (vg: ANF.VarGen) : Result = + match pat with + | AST.PInt64 _ | AST.PInt128Literal _ + | AST.PInt8Literal _ + | AST.PInt16Literal _ + | AST.PInt32Literal _ + | AST.PUInt8Literal _ + | AST.PUInt16Literal _ + | AST.PUInt32Literal _ + | AST.PUInt64Literal _ | AST.PUInt128Literal _ + | AST.PUnit + | AST.PWildcard + | AST.PBool _ + | AST.PString _ + | AST.PChar _ + | AST.PFloat _ -> + // No variable bindings + Ok (env, bindings, vg) + | AST.PVar name -> + // Bind the source to a variable with the correct type + // Use TypedAtom to preserve the semantic type (e.g., tuple element type) + // even when the source comes from a function with generic return type + let (tempId, vg1) = ANF.freshVar vg + let binding = (tempId, ANF.TypedAtom (sourceAtom, sourceType)) + let newEnv = Map.add name (tempId, sourceType) env + Ok (newEnv, binding :: bindings, vg1) + | AST.PTuple innerPatterns -> + let unknownElemTypes = + innerPatterns + |> List.mapi (fun idx _ -> AST.TVar $"__tuple_elem_{idx}") + + // Extract each element and recursively collect bindings + let rec collectFromTuple (pats: AST.Pattern list) (types: AST.Type list) (idx: int) (env: VarEnv) (bindings: (ANF.TempId * ANF.CExpr) list) (vg: ANF.VarGen) = + match pats, types with + | [], _ -> Ok (env, bindings, vg) + | p :: rest, t :: restTypes -> + // Extract raw element with TupleGet + let (rawElemVar, vg1) = ANF.freshVar vg + let rawElemExpr = ANF.TupleGet (sourceAtom, idx) + let rawElemBinding = (rawElemVar, rawElemExpr) + // Wrap with TypedAtom to preserve correct element type in TypeMap + let (elemVar, vg1') = ANF.freshVar vg1 + let elemExpr = ANF.TypedAtom (ANF.Var rawElemVar, t) + let elemBinding = (elemVar, elemExpr) + // Recursively collect bindings from this element's pattern with correct type + collectPatternBindings p (ANF.Var elemVar) t env (elemBinding :: rawElemBinding :: bindings) vg1' + |> Result.bind (fun (env', bindings', vg') -> + collectFromTuple rest restTypes (idx + 1) env' bindings' vg') + | _ -> + Error "Tuple pattern element/type mismatch" + + let elemTypes = + match sourceType with + | AST.TTuple types when List.length types = List.length innerPatterns -> types + | _ -> unknownElemTypes + + collectFromTuple innerPatterns elemTypes 0 env bindings vg + | AST.PConstructor (constructorName, payloadPattern) -> + let rec substituteType (subst: Map) (typ: AST.Type) : AST.Type = + match typ with + | AST.TVar name -> Map.tryFind name subst |> Option.defaultValue typ + | AST.TTuple elems -> AST.TTuple (List.map (substituteType subst) elems) + | AST.TRecord (name, args) -> AST.TRecord (name, List.map (substituteType subst) args) + | AST.TList elem -> AST.TList (substituteType subst elem) + | AST.TDict (k, v) -> AST.TDict (substituteType subst k, substituteType subst v) + | AST.TSum (name, args) -> AST.TSum (name, List.map (substituteType subst) args) + | AST.TFunction (args, ret) -> AST.TFunction (List.map (substituteType subst) args, substituteType subst ret) + | _ -> typ + + let resolvePayloadType (constructorName: string) (scrutineeType: AST.Type) : Result = + match Map.tryFind constructorName variantLookup with + | Some (_, typeParams, _, Some payloadTypeTemplate) -> + let payloadType = + match scrutineeType with + | AST.TSum (_, typeArgs) when List.length typeParams = List.length typeArgs -> + let subst = List.zip typeParams typeArgs |> Map.ofList + substituteType subst payloadTypeTemplate + | _ -> payloadTypeTemplate + Ok (Some payloadType) + | Some (_, _, _, None) -> + Ok None + | None -> + Error $"Unknown constructor '{constructorName}' in pattern" + + match payloadPattern with + | None -> Ok (env, bindings, vg) + | Some innerPat -> + resolvePayloadType constructorName sourceType + |> Result.bind (fun payloadType -> + match payloadType with + | None -> + // Constructor arity mismatch should not bind payload. + Ok (env, bindings, vg) + | Some concretePayloadType -> + // Extract payload (at index 1) and recursively collect + let (payloadVar, vg1) = ANF.freshVar vg + let payloadExpr = ANF.TupleGet (sourceAtom, 1) + let payloadBinding = (payloadVar, payloadExpr) + collectPatternBindings + innerPat + (ANF.Var payloadVar) + concretePayloadType + env + (payloadBinding :: bindings) + vg1) + | AST.PRecord (_, fieldPatterns) -> + let fieldTypesResult : Result = + match sourceType with + | AST.TRecord (recordName, _) -> + match Map.tryFind recordName typeReg with + | Some fields -> + Ok (fields |> List.map snd) + | None -> + Error $"Unknown record type: {recordName}" + | AST.TVar sourceTypeVar -> + // Preserve unresolved field types when record shape is unknown. + Ok ( + fieldPatterns + |> List.mapi (fun idx _ -> + AST.TVar $"__record_field_{sourceTypeVar}_{idx}") + ) + | _ -> + Error $"Record pattern used on non-record type {typeToString sourceType}" + fieldTypesResult + |> Result.bind (fun fieldTypes -> + // Extract each field and recursively collect bindings + let rec collectFromRecord (fields: (string * AST.Pattern) list) (types: AST.Type list) (idx: int) (env: VarEnv) (bindings: (ANF.TempId * ANF.CExpr) list) (vg: ANF.VarGen) = + match fields, types with + | [], _ -> Ok (env, bindings, vg) + | (_, p) :: rest, t :: restTypes -> + let (fieldVar, vg1) = ANF.freshVar vg + let fieldExpr = ANF.TupleGet (sourceAtom, idx) + let fieldBinding = (fieldVar, fieldExpr) + collectPatternBindings p (ANF.Var fieldVar) t env (fieldBinding :: bindings) vg1 + |> Result.bind (fun (env', bindings', vg') -> + collectFromRecord rest restTypes (idx + 1) env' bindings' vg') + | (_, p) :: rest, [] -> + let (fieldVar, vg1) = ANF.freshVar vg + let fieldExpr = ANF.TupleGet (sourceAtom, idx) + let fieldBinding = (fieldVar, fieldExpr) + let unresolvedFieldType = AST.TVar $"__record_field_missing_{idx}" + collectPatternBindings p (ANF.Var fieldVar) unresolvedFieldType env (fieldBinding :: bindings) vg1 + |> Result.bind (fun (env', bindings', vg') -> + collectFromRecord rest [] (idx + 1) env' bindings' vg') + collectFromRecord fieldPatterns fieldTypes 0 env bindings vg) + | AST.PList innerPatterns -> + // Extract element type from list type + let elemType = + match sourceType with + | AST.TList t -> t + | _ -> AST.TVar "__list_elem_unknown" + // For list patterns, extract head elements using FingerTree operations + // Use _i64 versions which work for any element type at runtime (all values are 64-bit) + // The correct element type is tracked in the VarEnv/TypeMap, not in the function name + let rec collectFromList (pats: AST.Pattern list) (currentList: ANF.Atom) (env: VarEnv) (bindings: (ANF.TempId * ANF.CExpr) list) (vg: ANF.VarGen) = + match pats with + | [] -> Ok (env, bindings, vg) + | p :: rest -> + // Lists are FingerTrees - use headUnsafe/tail to extract + let (headVar, vg1) = ANF.freshVar vg + let headExpr = ANF.Call ("Stdlib.__FingerTree.headUnsafe_i64", [currentList]) + let headBinding = (headVar, headExpr) + collectPatternBindings p (ANF.Var headVar) elemType env (headBinding :: bindings) vg1 + |> Result.bind (fun (env', bindings', vg') -> + if List.isEmpty rest then + Ok (env', bindings', vg') + else + // Get tail for next iteration + let (tailVar, vg2) = ANF.freshVar vg' + let tailExpr = ANF.Call ("Stdlib.__FingerTree.tail_i64", [currentList]) + let tailBinding = (tailVar, tailExpr) + collectFromList rest (ANF.Var tailVar) env' (tailBinding :: bindings') vg2) + collectFromList innerPatterns sourceAtom env bindings vg + | AST.PListCons (headPatterns, tailPattern) -> + // Extract element type from list type + let elemType = + match sourceType with + | AST.TList t -> t + | _ -> AST.TVar "__list_elem_unknown" + // Extract head elements then bind tail using FingerTree operations + // Use _i64 versions which work for any element type at runtime (all values are 64-bit) + // The correct element type is tracked in the VarEnv/TypeMap, not in the function name + let rec collectHeads (pats: AST.Pattern list) (currentList: ANF.Atom) (env: VarEnv) (bindings: (ANF.TempId * ANF.CExpr) list) (vg: ANF.VarGen) = + match pats with + | [] -> + // Bind the remaining list to tail pattern (tail has same type as source) + collectPatternBindings tailPattern currentList sourceType env bindings vg + | p :: rest -> + // Lists are FingerTrees - use headUnsafe/tail to extract + let (rawHeadVar, vg1) = ANF.freshVar vg + let rawHeadExpr = ANF.Call ("Stdlib.__FingerTree.headUnsafe_i64", [currentList]) + let rawHeadBinding = (rawHeadVar, rawHeadExpr) + // Wrap with TypedAtom to preserve correct element type in TypeMap + let (headVar, vg1') = ANF.freshVar vg1 + let headExpr = ANF.TypedAtom (ANF.Var rawHeadVar, elemType) + let headBinding = (headVar, headExpr) + collectPatternBindings p (ANF.Var headVar) elemType env (headBinding :: rawHeadBinding :: bindings) vg1' + |> Result.bind (fun (env', bindings', vg') -> + let (rawTailVar, vg2) = ANF.freshVar vg' + let rawTailExpr = ANF.Call ("Stdlib.__FingerTree.tail_i64", [currentList]) + let rawTailBinding = (rawTailVar, rawTailExpr) + // Wrap tail with TypedAtom to preserve list type + let (tailVar, vg2') = ANF.freshVar vg2 + let tailExpr = ANF.TypedAtom (ANF.Var rawTailVar, sourceType) + let tailBinding = (tailVar, tailExpr) + collectHeads rest (ANF.Var tailVar) env' (tailBinding :: rawTailBinding :: bindings') vg2') + collectHeads headPatterns sourceAtom env bindings vg + + // Collect all bindings from the tuple pattern, then compile body + collectPatternBindings (AST.PTuple patterns) scrutAtom scrutType currentEnv [] vg + |> Result.bind (fun (newEnv, bindings, vg1) -> + toANF body vg1 newEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg2) -> + let finalExpr = wrapBindings (List.rev bindings) bodyExpr + (finalExpr, vg2))) + | AST.PRecord (_, fieldPatterns) -> + // Extract field types from record type + let fieldTypesResult : Result = + match scrutType with + | AST.TRecord (recordName, _) -> + match Map.tryFind recordName typeReg with + | Some fields -> + Ok (fields |> List.map snd) + | None -> + Error $"Unknown record type: {recordName}" + | AST.TVar sourceTypeVar -> + Ok ( + fieldPatterns + |> List.mapi (fun idx _ -> + AST.TVar $"__record_field_{sourceTypeVar}_{idx}") + ) + | AST.TRuntimeError -> + Ok ( + fieldPatterns + |> List.mapi (fun idx _ -> + AST.TVar $"__record_field_runtime_error_{idx}") + ) + | _ -> + Error $"Record pattern used on non-record type {typeToString scrutType}" + // Extract each field and bind pattern variables + let rec collectRecordBindings (fields: (string * AST.Pattern) list) (types: AST.Type list) (env: VarEnv) (bindings: (ANF.TempId * ANF.CExpr) list) (vg: ANF.VarGen) (fieldIdx: int) : Result = + match fields, types with + | [], _ -> Ok (env, List.rev bindings, vg) + | (_, pat) :: rest, t :: restTypes -> + let (fieldVar, vg1) = ANF.freshVar vg + let fieldExpr = ANF.TupleGet (scrutAtom, fieldIdx) + let binding = (fieldVar, fieldExpr) + match pat with + | AST.PVar name -> + // Use the correct field type + let newEnv = Map.add name (fieldVar, t) env + collectRecordBindings rest restTypes newEnv (binding :: bindings) vg1 (fieldIdx + 1) + | AST.PWildcard -> + collectRecordBindings rest restTypes env bindings vg1 (fieldIdx + 1) + | AST.PInt64 _ | AST.PInt128Literal _ + | AST.PInt8Literal _ + | AST.PInt16Literal _ + | AST.PInt32Literal _ + | AST.PUInt8Literal _ + | AST.PUInt16Literal _ + | AST.PUInt32Literal _ + | AST.PUInt64Literal _ | AST.PUInt128Literal _ + | AST.PUnit + | AST.PConstructor _ + | AST.PBool _ + | AST.PString _ | AST.PChar _ | AST.PFloat _ | AST.PTuple _ | AST.PRecord _ + | AST.PList _ | AST.PListCons _ -> + Error $"Nested pattern in record field not yet supported: {pat}" + | (_, pat) :: rest, [] -> + // Fallback + let (fieldVar, vg1) = ANF.freshVar vg + let fieldExpr = ANF.TupleGet (scrutAtom, fieldIdx) + let binding = (fieldVar, fieldExpr) + match pat with + | AST.PVar name -> + let unresolvedFieldType = AST.TVar $"__record_field_missing_{fieldIdx}" + let newEnv = Map.add name (fieldVar, unresolvedFieldType) env + collectRecordBindings rest [] newEnv (binding :: bindings) vg1 (fieldIdx + 1) + | AST.PWildcard -> + collectRecordBindings rest [] env bindings vg1 (fieldIdx + 1) + | _ -> + Error $"Nested pattern in record field not yet supported: {pat}" + fieldTypesResult + |> Result.bind (fun fieldTypes -> + collectRecordBindings fieldPatterns fieldTypes currentEnv [] vg 0) + |> Result.bind (fun (newEnv, bindings, vg1) -> + toANF body vg1 newEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg2) -> + let finalExpr = wrapBindings bindings bodyExpr + (finalExpr, vg2))) + | AST.PList patterns -> + // Extract list elements from FingerTree structure + // FingerTree layout: + // SINGLE (tag 1): [node:8] where node is LEAF-tagged + // DEEP (tag 2): [measure:8][prefixCount:8][p0:8][p1:8][p2:8][p3:8][middle:8][suffixCount:8][s0:8][s1:8][s2:8][s3:8] + // LEAF (tag 5): [value:8] + + // Get element type from list type + let elemType = + match scrutType with + | AST.TList t -> t + | AST.TVar scrutTypeVar -> AST.TVar $"__list_elem_{scrutTypeVar}" + | AST.TRuntimeError -> AST.TVar "__list_elem_runtime_error" + | _ -> AST.TVar "__list_elem_unknown" + + // Helper to unwrap a LEAF node and get the value + let unwrapLeaf (leafTaggedPtr: ANF.Atom) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + let (leafPtrVar, vg1) = ANF.freshVar vg + let leafPtrExpr = ANF.Prim (ANF.BitAnd, leafTaggedPtr, ANF.IntLiteral (ANF.Int64 0xFFFFFFFFFFFFFFF8L)) + let (valueVar, vg2) = ANF.freshVar vg1 + let valueExpr = ANF.RawGet (ANF.Var leafPtrVar, ANF.IntLiteral (ANF.Int64 0L), None) + let newBindings = bindings @ [(leafPtrVar, leafPtrExpr); (valueVar, valueExpr)] + (ANF.Var valueVar, valueVar, newBindings, vg2) + + // Helper to extract tuple elements from a value + // tupleType is the type of the tuple being destructured + let rec collectTupleBindings (tupPats: AST.Pattern list) (tupleAtom: ANF.Atom) (tupleType: AST.Type) (idx: int) (env: VarEnv) (bindings: (ANF.TempId * ANF.CExpr) list) (vg: ANF.VarGen) : Result = + let tupleElemTypesResult = + match tupleType with + | AST.TTuple types when List.length types >= List.length tupPats -> Ok types + | AST.TTuple types -> + Error $"Tuple pattern expects {List.length tupPats} elements but got {List.length types}" + | _ -> + Error $"Tuple pattern expects tuple elements, got {typeToString tupleType}" + match tupleElemTypesResult with + | Error err -> + Error err + | Ok tupleElemTypes -> + match tupPats with + | [] -> Ok (env, bindings, vg) + | tupPat :: tupRest -> + let (elemVar, vg1) = ANF.freshVar vg + let elemExpr = ANF.TupleGet (tupleAtom, idx) + let elemBinding = (elemVar, elemExpr) + let elemT = List.item idx tupleElemTypes + match tupPat with + | AST.PVar name -> + let newEnv = Map.add name (elemVar, elemT) env + collectTupleBindings tupRest tupleAtom tupleType (idx + 1) newEnv (bindings @ [elemBinding]) vg1 + | AST.PWildcard -> + collectTupleBindings tupRest tupleAtom tupleType (idx + 1) env bindings vg1 + | AST.PInt64 _ | AST.PInt128Literal _ + | AST.PInt8Literal _ + | AST.PInt16Literal _ + | AST.PInt32Literal _ + | AST.PUInt8Literal _ + | AST.PUInt16Literal _ + | AST.PUInt32Literal _ + | AST.PUInt64Literal _ | AST.PUInt128Literal _ + | AST.PUnit + | AST.PConstructor _ + | AST.PBool _ + | AST.PString _ | AST.PChar _ | AST.PFloat _ | AST.PTuple _ | AST.PRecord _ + | AST.PList _ | AST.PListCons _ -> + Error $"Nested pattern in tuple element not yet supported: {tupPat}" + + let patternLen = List.length patterns + if patternLen = 0 then + // Empty pattern - no bindings needed + toANF body vg currentEnv typeReg variantLookup funcReg moduleRegistry + elif patternLen = 1 then + // SINGLE node: extract the single element + // Untag to get pointer to SINGLE structure + let (ptrVar, vg1) = ANF.freshVar vg + let ptrExpr = ANF.Prim (ANF.BitAnd, scrutAtom, ANF.IntLiteral (ANF.Int64 0xFFFFFFFFFFFFFFF8L)) + // Get the LEAF-tagged node at offset 0 + let (nodeVar, vg2) = ANF.freshVar vg1 + let nodeExpr = ANF.RawGet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 0L), None) + // Unwrap the LEAF to get the value + let (rawValueAtom, rawValueVar, rawBindings, vg3) = unwrapLeaf (ANF.Var nodeVar) vg2 [(ptrVar, ptrExpr); (nodeVar, nodeExpr)] + // Wrap with TypedAtom to preserve element type in TypeMap + let (typedValueVar, vg3') = ANF.freshVar vg3 + let typedValueExpr = ANF.TypedAtom (rawValueAtom, elemType) + let bindings = rawBindings @ [(typedValueVar, typedValueExpr)] + let valueVar = typedValueVar + let valueAtom = ANF.Var typedValueVar + // Bind the pattern + match List.head patterns with + | AST.PVar name -> + let newEnv = Map.add name (valueVar, elemType) currentEnv + toANF body vg3' newEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg4) -> + (wrapBindings bindings bodyExpr, vg4)) + | AST.PWildcard -> + toANF body vg3' currentEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg4) -> + (wrapBindings bindings bodyExpr, vg4)) + | AST.PInt64 _ | AST.PInt128Literal _ + | AST.PInt8Literal _ + | AST.PInt16Literal _ + | AST.PInt32Literal _ + | AST.PUInt8Literal _ + | AST.PUInt16Literal _ + | AST.PUInt32Literal _ + | AST.PUInt64Literal _ | AST.PUInt128Literal _ -> + toANF body vg3' currentEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg4) -> + (wrapBindings bindings bodyExpr, vg4)) + | AST.PTuple innerPatterns -> + // elemType is the list element type, use it as tuple type + collectTupleBindings innerPatterns valueAtom elemType 0 currentEnv bindings vg3' + |> Result.bind (fun (newEnv, newBindings, vg4) -> + toANF body vg4 newEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg5) -> + (wrapBindings newBindings bodyExpr, vg5))) + | AST.PConstructor _ | AST.PList _ | AST.PListCons _ -> + Error "Nested pattern in list element not yet supported" + | _ -> + Error $"Unsupported pattern in single-element list: {List.head patterns}" + else + // DEEP node: extract elements from prefix and suffix + // Untag to get pointer to DEEP structure + let (ptrVar, vg1) = ANF.freshVar vg + let ptrExpr = ANF.Prim (ANF.BitAnd, scrutAtom, ANF.IntLiteral (ANF.Int64 0xFFFFFFFFFFFFFFF8L)) + let initialBindings = [(ptrVar, ptrExpr)] + + // Extract elements - first from prefix, then from suffix + // Prefix offsets: 16, 24, 32, 40 (p0-p3) + // Suffix offsets: 64, 72, 80, 88 (s0-s3) + let rec extractElements (pats: AST.Pattern list) (idx: int) (env: VarEnv) (bindings: (ANF.TempId * ANF.CExpr) list) (vg: ANF.VarGen) : Result = + match pats with + | [] -> Ok (env, bindings, vg) + | pat :: rest -> + // Calculate offset based on position + // First element at idx 0 is in prefix at offset 16 + // For DEEP nodes with elements in prefix/suffix: + // We place first element in prefix, rest in suffix + let offset = + if idx = 0 then 16L // p0 + else 64L + (int64 (idx - 1) * 8L) // s0, s1, s2, s3 at 64, 72, 80, 88 + + // Get the LEAF-tagged node + let (nodeVar, vg1) = ANF.freshVar vg + let nodeExpr = ANF.RawGet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 offset), None) + // Unwrap the LEAF to get the value + let (rawValueAtom, rawValueVar, rawBindings, vg2) = unwrapLeaf (ANF.Var nodeVar) vg1 (bindings @ [(nodeVar, nodeExpr)]) + // Wrap with TypedAtom to preserve element type in TypeMap + let (typedValueVar, vg2') = ANF.freshVar vg2 + let typedValueExpr = ANF.TypedAtom (rawValueAtom, elemType) + let newBindings = rawBindings @ [(typedValueVar, typedValueExpr)] + let valueVar = typedValueVar + let valueAtom = ANF.Var typedValueVar + + match pat with + | AST.PVar name -> + let newEnv = Map.add name (valueVar, elemType) env + extractElements rest (idx + 1) newEnv newBindings vg2' + | AST.PWildcard -> + extractElements rest (idx + 1) env newBindings vg2' + | AST.PInt64 _ | AST.PInt128Literal _ + | AST.PInt8Literal _ + | AST.PInt16Literal _ + | AST.PInt32Literal _ + | AST.PUInt8Literal _ + | AST.PUInt16Literal _ + | AST.PUInt32Literal _ + | AST.PUInt64Literal _ | AST.PUInt128Literal _ -> + extractElements rest (idx + 1) env newBindings vg2' + | AST.PTuple innerPatterns -> + // elemType is the list element type, use it as tuple type + collectTupleBindings innerPatterns valueAtom elemType 0 env newBindings vg2' + |> Result.bind (fun (tupEnv, tupBindings, vg3) -> + extractElements rest (idx + 1) tupEnv tupBindings vg3) + | _ -> + Error $"Unsupported pattern in list element: {pat}" + + extractElements patterns 0 currentEnv initialBindings vg1 + |> Result.bind (fun (newEnv, bindings, vg2) -> + toANF body vg2 newEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg3) -> + (wrapBindings bindings bodyExpr, vg3))) + | AST.PListCons (headPatterns, tailPattern) -> + // Get element type from list type + let elemType = + match scrutType with + | AST.TList t -> t + | _ -> Crash.crash $"PListCons pattern expects TList scrutinee in extractAndCompileBody, got {scrutType}" + // Extract head elements and bind tail using FingerTree operations + // Lists are FingerTrees, use headUnsafe_i64/tail_i64 for extraction + let rec collectListConsBindings (pats: AST.Pattern list) (listAtom: ANF.Atom) (env: VarEnv) (bindings: (ANF.TempId * ANF.CExpr) list) (vg: ANF.VarGen) : Result = + match pats with + | [] -> Ok (env, List.rev bindings, listAtom, vg) + | pat :: rest -> + // Extract head using FingerTree.headUnsafe_i64 + let (rawHeadVar, vg1) = ANF.freshVar vg + let rawHeadExpr = ANF.Call ("Stdlib.__FingerTree.headUnsafe_i64", [listAtom]) + let rawHeadBinding = (rawHeadVar, rawHeadExpr) + // Wrap with TypedAtom to preserve correct element type in TypeMap + let (headVar, vg1') = ANF.freshVar vg1 + let headExpr = ANF.TypedAtom (ANF.Var rawHeadVar, elemType) + let headBinding = (headVar, headExpr) + // Extract tail using FingerTree.tail_i64 + let (rawTailVar, vg2) = ANF.freshVar vg1' + let rawTailExpr = ANF.Call ("Stdlib.__FingerTree.tail_i64", [listAtom]) + let rawTailBinding = (rawTailVar, rawTailExpr) + // Wrap with TypedAtom to preserve list type for tail + let listType = AST.TList elemType + let (tailVar, vg2') = ANF.freshVar vg2 + let tailExpr = ANF.TypedAtom (ANF.Var rawTailVar, listType) + let tailBinding = (tailVar, tailExpr) + // All bindings including raw extractions + // Order: typedBindings first (will be reversed at line 3923), so after reversal raw bindings come before typed + let allBaseBindings = tailBinding :: rawTailBinding :: headBinding :: rawHeadBinding :: bindings + match pat with + | AST.PVar name -> + let newEnv = Map.add name (headVar, elemType) env + collectListConsBindings rest (ANF.Var tailVar) newEnv allBaseBindings vg2' + | AST.PWildcard -> + collectListConsBindings rest (ANF.Var tailVar) env allBaseBindings vg2' + | AST.PTuple innerPatterns -> + // For tuple patterns inside list cons, extract each tuple element and bind variables + // elemType is the tuple type (since list elements are tuples) + let tupleElemTypes = + match elemType with + | AST.TTuple types -> types + | AST.TVar tupleTypeVar -> + innerPatterns + |> List.mapi (fun idx _ -> + AST.TVar $"__tuple_elem_{tupleTypeVar}_{idx}") + | AST.TRuntimeError -> + innerPatterns + |> List.mapi (fun idx _ -> + AST.TVar $"__tuple_elem_runtime_error_{idx}") + | _ -> + innerPatterns + |> List.mapi (fun idx _ -> + AST.TVar $"__tuple_elem_unknown_{idx}") + let rec collectTupleBindings (tupPats: AST.Pattern list) (types: AST.Type list) (tupleAtom: ANF.Atom) (idx: int) (env: VarEnv) (bindings: (ANF.TempId * ANF.CExpr) list) (vg: ANF.VarGen) : Result = + match tupPats with + | [] -> Ok (env, bindings, vg) + | tupPat :: tupRest -> + // Extract raw element with TupleGet + let (rawElemVar, vg1) = ANF.freshVar vg + let rawElemExpr = ANF.TupleGet (tupleAtom, idx) + let rawElemBinding = (rawElemVar, rawElemExpr) + let elemT = + if idx < List.length types then + List.item idx types + else + AST.TVar $"__tuple_elem_missing_{idx}" + // Wrap with TypedAtom to preserve correct element type + let (elemVar, vg1') = ANF.freshVar vg1 + let elemExpr = ANF.TypedAtom (ANF.Var rawElemVar, elemT) + let elemBinding = (elemVar, elemExpr) + match tupPat with + | AST.PVar name -> + let newEnv = Map.add name (elemVar, elemT) env + collectTupleBindings tupRest types tupleAtom (idx + 1) newEnv (elemBinding :: rawElemBinding :: bindings) vg1' + | AST.PWildcard -> + collectTupleBindings tupRest types tupleAtom (idx + 1) env (rawElemBinding :: bindings) vg1 + | AST.PInt64 _ | AST.PInt128Literal _ + | AST.PInt8Literal _ + | AST.PInt16Literal _ + | AST.PInt32Literal _ + | AST.PUInt8Literal _ + | AST.PUInt16Literal _ + | AST.PUInt32Literal _ + | AST.PUInt64Literal _ | AST.PUInt128Literal _ + | AST.PUnit + | AST.PConstructor _ + | AST.PBool _ + | AST.PString _ | AST.PChar _ | AST.PFloat _ | AST.PTuple _ | AST.PRecord _ + | AST.PList _ | AST.PListCons _ -> + Error $"Nested pattern in tuple element not yet supported: {tupPat}" + collectTupleBindings innerPatterns tupleElemTypes (ANF.Var headVar) 0 env allBaseBindings vg2' + |> Result.bind (fun (newEnv, newBindings, vg3) -> + collectListConsBindings rest (ANF.Var tailVar) newEnv newBindings vg3) + | AST.PInt64 _ | AST.PInt128Literal _ + | AST.PInt8Literal _ + | AST.PInt16Literal _ + | AST.PInt32Literal _ + | AST.PUInt8Literal _ + | AST.PUInt16Literal _ + | AST.PUInt32Literal _ + | AST.PUInt64Literal _ | AST.PUInt128Literal _ -> + collectListConsBindings rest (ANF.Var tailVar) env allBaseBindings vg2' + | AST.PUnit + | AST.PConstructor _ + | AST.PBool _ + | AST.PString _ | AST.PChar _ | AST.PFloat _ | AST.PRecord _ + | AST.PList _ | AST.PListCons _ -> + Error $"Nested pattern in list cons element not yet supported: {pat}" + collectListConsBindings headPatterns scrutAtom currentEnv [] vg + |> Result.bind (fun (newEnv, bindings, tailAtom, vg1) -> + // Bind tail pattern + match tailPattern with + | AST.PVar name -> + let (tailVar, vg2) = ANF.freshVar vg1 + // Tail has the same list type as the scrutinee + let newEnv' = Map.add name (tailVar, scrutType) newEnv + toANF body vg2 newEnv' typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg3) -> + let tailBinding = (tailVar, ANF.TypedAtom (tailAtom, scrutType)) + let allBindings = bindings @ [tailBinding] + let finalExpr = wrapBindings allBindings bodyExpr + (finalExpr, vg3)) + | AST.PWildcard -> + toANF body vg1 newEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg2) -> + let finalExpr = wrapBindings bindings bodyExpr + (finalExpr, vg2)) + | _ -> Error "Tail pattern in list cons must be variable or wildcard") + + // Extract pattern bindings, check guard, and compile body + // Returns: if guard is true, execute body; otherwise execute elseExpr + // scrutType is the type of the scrutinee for correct pattern variable typing + and extractAndCompileBodyWithGuard (pattern: AST.Pattern) (guardExpr: AST.Expr) (body: AST.Expr) (scrutAtom: ANF.Atom) (scrutType: AST.Type) (currentEnv: VarEnv) (vg: ANF.VarGen) (elseExpr: ANF.AExpr) : Result = + // First, we need to extract bindings from the pattern + // Then compile the guard with those bindings in scope + // Then compile the body with those bindings in scope + // Finally, generate: let in if then else + + // Return true only when we can prove a pattern can never match this type. + // Used to preserve "fall through" semantics for guarded patterns that should not bind. + let rec patternDefinitelyCannotMatchType (pat: AST.Pattern) (patType: AST.Type) : bool = + match pat with + | AST.PTuple innerPatterns -> + match patType with + | AST.TTuple elemTypes -> + List.length innerPatterns <> List.length elemTypes + || List.exists2 patternDefinitelyCannotMatchType innerPatterns elemTypes + | AST.TVar _ -> false + | _ -> true + | AST.PList innerPatterns -> + match patType with + | AST.TList elemType -> + innerPatterns + |> List.exists (fun innerPat -> + patternDefinitelyCannotMatchType innerPat elemType) + | AST.TVar _ -> false + | _ -> true + | AST.PListCons (headPatterns, tailPattern) -> + match patType with + | AST.TList elemType -> + (headPatterns + |> List.exists (fun headPat -> + patternDefinitelyCannotMatchType headPat elemType)) + || patternDefinitelyCannotMatchType tailPattern patType + | AST.TVar _ -> false + | _ -> true + | AST.PRecord _ -> + match patType with + | AST.TRecord _ -> false + | AST.TVar _ -> false + | _ -> true + | _ -> false + + // Helper to collect pattern variable bindings (simplified version for common patterns) + // sourceType is the type of the source being matched + let rec collectBindings (pat: AST.Pattern) (sourceAtom: ANF.Atom) (sourceType: AST.Type) (env: VarEnv) (bindings: (ANF.TempId * ANF.CExpr) list) (vg: ANF.VarGen) : Result = + match pat with + | AST.PInt64 _ | AST.PInt128Literal _ + | AST.PInt8Literal _ + | AST.PInt16Literal _ + | AST.PInt32Literal _ + | AST.PUInt8Literal _ + | AST.PUInt16Literal _ + | AST.PUInt32Literal _ + | AST.PUInt64Literal _ | AST.PUInt128Literal _ + | AST.PUnit + | AST.PWildcard + | AST.PBool _ + | AST.PString _ + | AST.PChar _ + | AST.PFloat _ -> + Ok (env, bindings, vg) + | AST.PVar name -> + let (tempId, vg1) = ANF.freshVar vg + // Use TypedAtom to preserve the correct type in TypeMap + let binding = (tempId, ANF.TypedAtom (sourceAtom, sourceType)) + let newEnv = Map.add name (tempId, sourceType) env + Ok (newEnv, binding :: bindings, vg1) + | AST.PTuple innerPatterns -> + let elemTypes = + match sourceType with + | AST.TTuple types when List.length types = List.length innerPatterns -> types + | AST.TTuple types -> + Crash.crash + $"collectBindings(PTuple): expected {List.length innerPatterns} tuple elements, got {List.length types}" + | _ -> + Crash.crash + $"collectBindings(PTuple): expected tuple source type, got {typeToString sourceType}" + let rec collectFromTuple pats types idx env bindings vg = + match pats, types with + | [], _ -> Ok (env, bindings, vg) + | p :: rest, t :: restTypes -> + let (elemVar, vg1) = ANF.freshVar vg + let elemExpr = ANF.TupleGet (sourceAtom, idx) + collectBindings p (ANF.Var elemVar) t env ((elemVar, elemExpr) :: bindings) vg1 + |> Result.bind (fun (env', bindings', vg') -> + collectFromTuple rest restTypes (idx + 1) env' bindings' vg') + | p :: rest, [] -> + let remaining = List.length (p :: rest) + Crash.crash + $"collectBindings(PTuple): missing tuple element type at index {idx}; {remaining} pattern elements remain" + collectFromTuple innerPatterns elemTypes 0 env bindings vg + | AST.PConstructor (constructorName, payloadPattern) -> + let rec substituteType (subst: Map) (typ: AST.Type) : AST.Type = + match typ with + | AST.TVar name -> Map.tryFind name subst |> Option.defaultValue typ + | AST.TTuple elems -> AST.TTuple (List.map (substituteType subst) elems) + | AST.TRecord (name, args) -> AST.TRecord (name, List.map (substituteType subst) args) + | AST.TList elem -> AST.TList (substituteType subst elem) + | AST.TDict (k, v) -> AST.TDict (substituteType subst k, substituteType subst v) + | AST.TSum (name, args) -> AST.TSum (name, List.map (substituteType subst) args) + | AST.TFunction (args, ret) -> AST.TFunction (List.map (substituteType subst) args, substituteType subst ret) + | _ -> typ + + let resolvePayloadType (constructorName: string) (scrutineeType: AST.Type) : Result = + match Map.tryFind constructorName variantLookup with + | Some (_, typeParams, _, Some payloadTypeTemplate) -> + let payloadType = + match scrutineeType with + | AST.TSum (_, typeArgs) when List.length typeParams = List.length typeArgs -> + let subst = List.zip typeParams typeArgs |> Map.ofList + substituteType subst payloadTypeTemplate + | _ -> payloadTypeTemplate + Ok (Some payloadType) + | Some (_, _, _, None) -> + Ok None + | None -> + Error $"Unknown constructor '{constructorName}' in pattern" + + match payloadPattern with + | None -> Ok (env, bindings, vg) + | Some innerPat -> + resolvePayloadType constructorName sourceType + |> Result.bind (fun payloadType -> + match payloadType with + | None -> + // Constructor arity mismatch should not bind payload. + Ok (env, bindings, vg) + | Some concretePayloadType -> + let (payloadVar, vg1) = ANF.freshVar vg + let payloadExpr = ANF.TupleGet (sourceAtom, 1) + collectBindings + innerPat + (ANF.Var payloadVar) + concretePayloadType + env + ((payloadVar, payloadExpr) :: bindings) + vg1) + | AST.PRecord (_, fieldPatterns) -> + let fieldTypesResult = + match sourceType with + | AST.TRecord (recordName, _) -> + match Map.tryFind recordName typeReg with + | Some fields -> Ok (fields |> List.map snd) + | None -> + Error $"collectBindings(PRecord): unknown record type '{recordName}'" + | _ -> + Error + $"collectBindings(PRecord): expected record source type, got {typeToString sourceType}" + let rec collectFromRecord fields types idx env bindings vg = + match fields, types with + | [], _ -> Ok (env, bindings, vg) + | (_, p) :: rest, t :: restTypes -> + let (fieldVar, vg1) = ANF.freshVar vg + let fieldExpr = ANF.TupleGet (sourceAtom, idx) + collectBindings p (ANF.Var fieldVar) t env ((fieldVar, fieldExpr) :: bindings) vg1 + |> Result.bind (fun (env', bindings', vg') -> + collectFromRecord rest restTypes (idx + 1) env' bindings' vg') + | (_, _) :: _, [] -> + Error $"collectBindings(PRecord): missing field type at index {idx}" + fieldTypesResult + |> Result.bind (fun fieldTypes -> + collectFromRecord fieldPatterns fieldTypes 0 env bindings vg) + | AST.PList innerPatterns -> + let elemTypeResult = + match sourceType with + | AST.TList t -> Ok t + | AST.TVar _ + | AST.TRuntimeError -> Ok (AST.TVar "__list_elem_unknown") + | _ -> + Error + $"collectBindings(PList): expected list-compatible source type, got {typeToString sourceType}" + elemTypeResult + |> Result.bind (fun elemType -> + // For list patterns, extract head elements using FingerTree operations + // Use _i64 versions which work for any element type at runtime (all values are 64-bit) + // The correct element type is tracked in the VarEnv/TypeMap, not in the function name + let rec collectFromList + (pats: AST.Pattern list) + (currentList: ANF.Atom) + (env: VarEnv) + (bindings: (ANF.TempId * ANF.CExpr) list) + (vg: ANF.VarGen) + = + match pats with + | [] -> Ok (env, bindings, vg) + | p :: rest -> + // Lists are FingerTrees - use headUnsafe/tail to extract + let (headVar, vg1) = ANF.freshVar vg + let headExpr = ANF.Call ("Stdlib.__FingerTree.headUnsafe_i64", [currentList]) + let headBinding = (headVar, headExpr) + collectBindings p (ANF.Var headVar) elemType env (headBinding :: bindings) vg1 + |> Result.bind (fun (env', bindings', vg') -> + if List.isEmpty rest then + Ok (env', bindings', vg') + else + // Get tail for next iteration + let (tailVar, vg2) = ANF.freshVar vg' + let tailExpr = ANF.Call ("Stdlib.__FingerTree.tail_i64", [currentList]) + let tailBinding = (tailVar, tailExpr) + collectFromList rest (ANF.Var tailVar) env' (tailBinding :: bindings') vg2) + collectFromList innerPatterns sourceAtom env bindings vg) + | AST.PListCons (headPatterns, tailPattern) -> + let elemTypeResult = + match sourceType with + | AST.TList t -> Ok t + | AST.TVar _ + | AST.TRuntimeError -> Ok (AST.TVar "__list_elem_unknown") + | _ -> + Error + $"collectBindings(PListCons): expected list-compatible source type, got {typeToString sourceType}" + elemTypeResult + |> Result.bind (fun elemType -> + // Extract head elements then bind tail using FingerTree operations + // Use _i64 versions which work for any element type at runtime (all values are 64-bit) + // The correct element type is tracked in the VarEnv/TypeMap, not in the function name + let rec collectHeads + (pats: AST.Pattern list) + (currentList: ANF.Atom) + (env: VarEnv) + (bindings: (ANF.TempId * ANF.CExpr) list) + (vg: ANF.VarGen) + = + match pats with + | [] -> + // Bind the remaining list to tail pattern (tail has same type as source) + collectBindings tailPattern currentList sourceType env bindings vg + | p :: rest -> + // Lists are FingerTrees - use headUnsafe/tail to extract + let (headVar, vg1) = ANF.freshVar vg + let headExpr = ANF.Call ("Stdlib.__FingerTree.headUnsafe_i64", [currentList]) + let headBinding = (headVar, headExpr) + collectBindings p (ANF.Var headVar) elemType env (headBinding :: bindings) vg1 + |> Result.bind (fun (env', bindings', vg') -> + let (tailVar, vg2) = ANF.freshVar vg' + let tailExpr = ANF.Call ("Stdlib.__FingerTree.tail_i64", [currentList]) + let tailBinding = (tailVar, tailExpr) + collectHeads rest (ANF.Var tailVar) env' (tailBinding :: bindings') vg2) + collectHeads headPatterns sourceAtom env bindings vg) + + if patternDefinitelyCannotMatchType pattern scrutType then + Ok (elseExpr, vg) + else + collectBindings pattern scrutAtom scrutType currentEnv [] vg + |> Result.bind (fun (newEnv, bindings, vg1) -> + // Compile guard expression in the extended environment + toAtom guardExpr vg1 newEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (guardAtom, guardBindings, vg2) -> + // Compile body expression in the extended environment + toANF body vg2 newEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg3) -> + // Build: if guard then body else elseExpr + let ifExpr = ANF.If (guardAtom, bodyExpr, elseExpr) + // Wrap guard bindings + let withGuardBindings = wrapBindings guardBindings ifExpr + // Wrap pattern bindings (in reverse order since we accumulated in reverse) + let finalExpr = wrapBindings (List.rev bindings) withGuardBindings + (finalExpr, vg3)))) + + // Build comparison expression for a pattern + let rec buildPatternComparison (pattern: AST.Pattern) (scrutAtom: ANF.Atom) (vg: ANF.VarGen) : Result<(ANF.Atom * (ANF.TempId * ANF.CExpr) list * ANF.VarGen) option, string> = + match pattern with + | AST.PUnit -> Ok None // Unit pattern always matches unit type + | AST.PWildcard -> Ok None + | AST.PVar _ -> Ok None + | AST.PInt64 n -> + let (cmpVar, vg1) = ANF.freshVar vg + let cmpExpr = ANF.Prim (ANF.Eq, scrutAtom, ANF.IntLiteral (ANF.Int64 n)) + Ok (Some (ANF.Var cmpVar, [(cmpVar, cmpExpr)], vg1)) + | AST.PInt128Literal n -> + let (cmpVar, vg1) = ANF.freshVar vg + let cmpExpr = ANF.Call ("__string_eq", [scrutAtom; ANF.StringLiteral (int128ToCanonicalString n)]) + Ok (Some (ANF.Var cmpVar, [(cmpVar, cmpExpr)], vg1)) + | AST.PInt8Literal n -> + let (cmpVar, vg1) = ANF.freshVar vg + let cmpExpr = ANF.Prim (ANF.Eq, scrutAtom, ANF.IntLiteral (ANF.Int8 n)) + Ok (Some (ANF.Var cmpVar, [(cmpVar, cmpExpr)], vg1)) + | AST.PInt16Literal n -> + let (cmpVar, vg1) = ANF.freshVar vg + let cmpExpr = ANF.Prim (ANF.Eq, scrutAtom, ANF.IntLiteral (ANF.Int16 n)) + Ok (Some (ANF.Var cmpVar, [(cmpVar, cmpExpr)], vg1)) + | AST.PInt32Literal n -> + let (cmpVar, vg1) = ANF.freshVar vg + let cmpExpr = ANF.Prim (ANF.Eq, scrutAtom, ANF.IntLiteral (ANF.Int32 n)) + Ok (Some (ANF.Var cmpVar, [(cmpVar, cmpExpr)], vg1)) + | AST.PUInt8Literal n -> + let (cmpVar, vg1) = ANF.freshVar vg + let cmpExpr = ANF.Prim (ANF.Eq, scrutAtom, ANF.IntLiteral (ANF.UInt8 n)) + Ok (Some (ANF.Var cmpVar, [(cmpVar, cmpExpr)], vg1)) + | AST.PUInt16Literal n -> + let (cmpVar, vg1) = ANF.freshVar vg + let cmpExpr = ANF.Prim (ANF.Eq, scrutAtom, ANF.IntLiteral (ANF.UInt16 n)) + Ok (Some (ANF.Var cmpVar, [(cmpVar, cmpExpr)], vg1)) + | AST.PUInt32Literal n -> + let (cmpVar, vg1) = ANF.freshVar vg + let cmpExpr = ANF.Prim (ANF.Eq, scrutAtom, ANF.IntLiteral (ANF.UInt32 n)) + Ok (Some (ANF.Var cmpVar, [(cmpVar, cmpExpr)], vg1)) + | AST.PUInt64Literal n -> + let (cmpVar, vg1) = ANF.freshVar vg + let cmpExpr = ANF.Prim (ANF.Eq, scrutAtom, ANF.IntLiteral (ANF.UInt64 n)) + Ok (Some (ANF.Var cmpVar, [(cmpVar, cmpExpr)], vg1)) + | AST.PUInt128Literal n -> + let (cmpVar, vg1) = ANF.freshVar vg + let cmpExpr = ANF.Call ("__string_eq", [scrutAtom; ANF.StringLiteral (uint128ToCanonicalString n)]) + Ok (Some (ANF.Var cmpVar, [(cmpVar, cmpExpr)], vg1)) + | AST.PBool b -> + let (cmpVar, vg1) = ANF.freshVar vg + let cmpExpr = ANF.Prim (ANF.Eq, scrutAtom, ANF.BoolLiteral b) + Ok (Some (ANF.Var cmpVar, [(cmpVar, cmpExpr)], vg1)) + | AST.PString s -> + // String patterns must use byte-wise equality, not pointer equality. + let (cmpVar, vg1) = ANF.freshVar vg + let cmpExpr = ANF.Call ("__string_eq", [scrutAtom; ANF.StringLiteral s]) + Ok (Some (ANF.Var cmpVar, [(cmpVar, cmpExpr)], vg1)) + | AST.PChar c -> + // Char values are represented as single-EGC strings at runtime. + let (cmpVar, vg1) = ANF.freshVar vg + let cmpExpr = ANF.Call ("__string_eq", [scrutAtom; ANF.StringLiteral c]) + Ok (Some (ANF.Var cmpVar, [(cmpVar, cmpExpr)], vg1)) + | AST.PFloat f -> + if f = 0.0 then + // Distinguish -0.0 from 0.0 using reciprocal sign. + let patternBits = System.BitConverter.DoubleToInt64Bits(f) + let reciprocalTarget = + if patternBits < 0L then + System.Double.NegativeInfinity + else + System.Double.PositiveInfinity + let (zeroCmpVar, vg1) = ANF.freshVar vg + let zeroCmpExpr = ANF.Prim (ANF.Eq, scrutAtom, ANF.FloatLiteral 0.0) + let (reciprocalVar, vg2) = ANF.freshVar vg1 + let reciprocalExpr = ANF.Prim (ANF.Div, ANF.FloatLiteral 1.0, scrutAtom) + let (reciprocalCmpVar, vg3) = ANF.freshVar vg2 + let reciprocalCmpExpr = + ANF.Prim (ANF.Eq, ANF.Var reciprocalVar, ANF.FloatLiteral reciprocalTarget) + let (andVar, vg4) = ANF.freshVar vg3 + let andExpr = ANF.Prim (ANF.And, ANF.Var zeroCmpVar, ANF.Var reciprocalCmpVar) + let bindings = + [ (zeroCmpVar, zeroCmpExpr) + (reciprocalVar, reciprocalExpr) + (reciprocalCmpVar, reciprocalCmpExpr) + (andVar, andExpr) ] + Ok (Some (ANF.Var andVar, bindings, vg4)) + else + let (cmpVar, vg1) = ANF.freshVar vg + let cmpExpr = ANF.Prim (ANF.Eq, scrutAtom, ANF.FloatLiteral f) + Ok (Some (ANF.Var cmpVar, [(cmpVar, cmpExpr)], vg1)) + | AST.PConstructor (variantName, payloadPattern) -> + match Map.tryFind variantName variantLookup with + | Some (_, _, tag, variantPayloadType) -> + let arityMismatch = + match payloadPattern, variantPayloadType with + | None, None -> false + | Some _, Some _ -> false + | _ -> true + + if arityMismatch then + // Constructor arity mismatch in pattern should not match. + let (cmpVar, vg1) = ANF.freshVar vg + let cmpExpr = ANF.Atom (ANF.BoolLiteral false) + Ok (Some (ANF.Var cmpVar, [(cmpVar, cmpExpr)], vg1)) + elif typeHasAnyPayload variantName then + // Mixed or payload-carrying sum type: tag is stored in heap at index 0. + let (tagVar, vg1) = ANF.freshVar vg + let tagLoadExpr = ANF.TupleGet (scrutAtom, 0) + let (tagCmpVar, vg2) = ANF.freshVar vg1 + let tagCmpExpr = ANF.Prim (ANF.Eq, ANF.Var tagVar, ANF.IntLiteral (ANF.Int64 (int64 tag))) + + match payloadPattern, variantPayloadType with + | Some innerPattern, Some _ -> + // Extract payload and check inner pattern if needed. + let (payloadVar, vg3) = ANF.freshVar vg2 + let payloadLoadExpr = ANF.TupleGet (scrutAtom, 1) + buildPatternComparison innerPattern (ANF.Var payloadVar) vg3 + |> Result.map (fun innerResult -> + match innerResult with + | None -> + // Inner pattern is variable/wildcard, only need tag check. + Some (ANF.Var tagCmpVar, [(tagVar, tagLoadExpr); (tagCmpVar, tagCmpExpr)], vg3) + | Some (innerCond, innerBindings, vg4) -> + let (andVar, vg5) = ANF.freshVar vg4 + let andExpr = ANF.Prim (ANF.And, ANF.Var tagCmpVar, innerCond) + let allBindings = + [(tagVar, tagLoadExpr); (tagCmpVar, tagCmpExpr); (payloadVar, payloadLoadExpr)] + @ innerBindings + @ [(andVar, andExpr)] + Some (ANF.Var andVar, allBindings, vg5)) + | None, None -> + // Nullary variant in a payload-mixed sum type: only check tag. + Ok (Some (ANF.Var tagCmpVar, [(tagVar, tagLoadExpr); (tagCmpVar, tagCmpExpr)], vg2)) + | _ -> + // Already handled by arityMismatch guard above. + Error "Internal error: inconsistent constructor arity handling" + else + // Simple enum (no payload variants in the type): scrutinee IS the tag. + match payloadPattern with + | Some _ -> + let (cmpVar, vg1) = ANF.freshVar vg + let cmpExpr = ANF.Atom (ANF.BoolLiteral false) + Ok (Some (ANF.Var cmpVar, [(cmpVar, cmpExpr)], vg1)) + | None -> + let (cmpVar, vg1) = ANF.freshVar vg + let cmpExpr = ANF.Prim (ANF.Eq, scrutAtom, ANF.IntLiteral (ANF.Int64 (int64 tag))) + Ok (Some (ANF.Var cmpVar, [(cmpVar, cmpExpr)], vg1)) + | None -> Error $"Unknown constructor in pattern: {variantName}" + | AST.PTuple innerPatterns -> + // Tuple patterns with literals need to compare each element + let rec buildTupleComparisons (patterns: AST.Pattern list) (index: int) (vg: ANF.VarGen) (accBindings: (ANF.TempId * ANF.CExpr) list) (accConditions: ANF.Atom list) = + match patterns with + | [] -> + if List.isEmpty accConditions then + Ok None // All variables/wildcards, no comparison needed + else + // AND together all conditions + let rec andAll (conds: ANF.Atom list) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + match conds with + | [] -> Error "Empty conditions list" + | [single] -> Ok (single, bindings, vg) + | first :: rest -> + andAll rest vg bindings + |> Result.map (fun (restResult, restBindings, vg1) -> + let (andVar, vg2) = ANF.freshVar vg1 + let andExpr = ANF.Prim (ANF.And, first, restResult) + (ANF.Var andVar, restBindings @ [(andVar, andExpr)], vg2)) + andAll accConditions vg accBindings + |> Result.map (fun (result, bindings, vg') -> Some (result, bindings, vg')) + | p :: rest -> + // Extract element at index + let (elemVar, vg1) = ANF.freshVar vg + let elemLoad = ANF.TupleGet (scrutAtom, index) + let newBindings = accBindings @ [(elemVar, elemLoad)] + // Check if this pattern needs comparison + buildPatternComparison p (ANF.Var elemVar) vg1 + |> Result.bind (fun compResult -> + match compResult with + | None -> + // This element pattern doesn't need comparison (var/wildcard) + buildTupleComparisons rest (index + 1) vg1 newBindings accConditions + | Some (cond, condBindings, vg2) -> + // Add this comparison + buildTupleComparisons rest (index + 1) vg2 (newBindings @ condBindings) (accConditions @ [cond])) + buildTupleComparisons innerPatterns 0 vg [] [] + | AST.PRecord (_, fieldPatterns) -> + // Record patterns with literals need to compare each field + let rec buildRecordComparisons (fields: (string * AST.Pattern) list) (vg: ANF.VarGen) (accBindings: (ANF.TempId * ANF.CExpr) list) (accConditions: ANF.Atom list) = + match fields with + | [] -> + if List.isEmpty accConditions then + Ok None + else + let rec andAll (conds: ANF.Atom list) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + match conds with + | [] -> Error "Empty conditions list" + | [single] -> Ok (single, bindings, vg) + | first :: rest -> + andAll rest vg bindings + |> Result.map (fun (restResult, restBindings, vg1) -> + let (andVar, vg2) = ANF.freshVar vg1 + let andExpr = ANF.Prim (ANF.And, first, restResult) + (ANF.Var andVar, restBindings @ [(andVar, andExpr)], vg2)) + andAll accConditions vg accBindings + |> Result.map (fun (result, bindings, vg') -> Some (result, bindings, vg')) + | (fieldName, p) :: rest -> + // Find field index in the record type (would need type info) + // For now, use a simple approach - records are ordered by field definition + // This is a simplification; proper implementation would need type lookup + let fieldIndex = List.findIndex (fun (fn, _) -> fn = fieldName) fieldPatterns + let (elemVar, vg1) = ANF.freshVar vg + let elemLoad = ANF.TupleGet (scrutAtom, fieldIndex) + let newBindings = accBindings @ [(elemVar, elemLoad)] + buildPatternComparison p (ANF.Var elemVar) vg1 + |> Result.bind (fun compResult -> + match compResult with + | None -> buildRecordComparisons rest vg1 newBindings accConditions + | Some (cond, condBindings, vg2) -> + buildRecordComparisons rest vg2 (newBindings @ condBindings) (accConditions @ [cond])) + buildRecordComparisons fieldPatterns vg [] [] + | AST.PList patterns -> + // List pattern comparison: check length matches for FingerTree + // FingerTree tags: EMPTY=0, SINGLE=1, DEEP=2 + // For [] pattern: check scrutinee == 0 (EMPTY) + // For [a] pattern: check tag == 1 (SINGLE) + // For [a, b, ...] pattern: check tag == 2 (DEEP) and measure == length + let patternLen = List.length patterns + if patternLen = 0 then + // Empty list pattern: check scrutinee == 0 + let (cmpVar, vg1) = ANF.freshVar vg + let cmpExpr = ANF.Prim (ANF.Eq, scrutAtom, ANF.IntLiteral (ANF.Int64 0L)) + Ok (Some (ANF.Var cmpVar, [(cmpVar, cmpExpr)], vg1)) + elif patternLen = 1 then + // Single element pattern: check tag == 1 (SINGLE) + let (tagVar, vg1) = ANF.freshVar vg + let tagExpr = ANF.Prim (ANF.BitAnd, scrutAtom, ANF.IntLiteral (ANF.Int64 7L)) + let (cmpVar, vg2) = ANF.freshVar vg1 + let cmpExpr = ANF.Prim (ANF.Eq, ANF.Var tagVar, ANF.IntLiteral (ANF.Int64 1L)) + Ok (Some (ANF.Var cmpVar, [(tagVar, tagExpr); (cmpVar, cmpExpr)], vg2)) + else + // Multiple elements: check length == patternLen + // Use Stdlib.__FingerTree.length which handles EMPTY/SINGLE/DEEP safely + let (lengthVar, vg1) = ANF.freshVar vg + let lengthExpr = ANF.Call ("Stdlib.__FingerTree.length_i64", [scrutAtom]) + let (cmpVar, vg2) = ANF.freshVar vg1 + let cmpExpr = ANF.Prim (ANF.Eq, ANF.Var lengthVar, ANF.IntLiteral (ANF.Int64 (int64 patternLen))) + Ok (Some (ANF.Var cmpVar, [(lengthVar, lengthExpr); (cmpVar, cmpExpr)], vg2)) + | AST.PListCons (headPatterns, _) -> + // List cons pattern: [...t] matches any list, [h, ...t] needs at least one element, + // [a, b, ...t] needs at least two, etc. + let minLength = List.length headPatterns + if minLength = 0 then + Ok None + else + let (lengthVar, vg1) = ANF.freshVar vg + let lengthExpr = ANF.Call ("Stdlib.__FingerTree.length_i64", [scrutAtom]) + let (cmpVar, vg2) = ANF.freshVar vg1 + let cmpExpr = ANF.Prim (ANF.Gte, ANF.Var lengthVar, ANF.IntLiteral (ANF.Int64 (int64 minLength))) + Ok (Some (ANF.Var cmpVar, [(lengthVar, lengthExpr); (cmpVar, cmpExpr)], vg2)) + + let rec patternBindsVariables (pattern: AST.Pattern) : bool = + match pattern with + | AST.PVar _ -> true + | AST.PTuple patterns -> + patterns |> List.exists patternBindsVariables + | AST.PRecord (_, fieldPatterns) -> + fieldPatterns |> List.exists (snd >> patternBindsVariables) + | AST.PConstructor (_, payloadPattern) -> + payloadPattern |> Option.exists patternBindsVariables + | AST.PList patterns -> + patterns |> List.exists patternBindsVariables + | AST.PListCons (headPatterns, tailPattern) -> + (headPatterns |> List.exists patternBindsVariables) || patternBindsVariables tailPattern + | _ -> false + + let rec substituteTypeForStaticPatternCheck (subst: Map) (typ: AST.Type) : AST.Type = + match typ with + | AST.TVar name -> Map.tryFind name subst |> Option.defaultValue typ + | AST.TTuple elems -> AST.TTuple (List.map (substituteTypeForStaticPatternCheck subst) elems) + | AST.TRecord (name, args) -> AST.TRecord (name, List.map (substituteTypeForStaticPatternCheck subst) args) + | AST.TList elem -> AST.TList (substituteTypeForStaticPatternCheck subst elem) + | AST.TDict (k, v) -> + AST.TDict (substituteTypeForStaticPatternCheck subst k, substituteTypeForStaticPatternCheck subst v) + | AST.TSum (name, args) -> AST.TSum (name, List.map (substituteTypeForStaticPatternCheck subst) args) + | AST.TFunction (args, ret) -> + AST.TFunction ( + List.map (substituteTypeForStaticPatternCheck subst) args, + substituteTypeForStaticPatternCheck subst ret + ) + | _ -> typ + + let resolvePayloadTypeForStaticPatternCheck + (constructorName: string) + (scrutineeType: AST.Type) + : AST.Type option option = + match Map.tryFind constructorName variantLookup with + | None -> None + | Some (sumTypeName, typeParams, _, payloadTypeTemplateOpt) -> + let payloadTypeOpt = + match payloadTypeTemplateOpt with + | None -> None + | Some payloadTypeTemplate -> + let payloadType = + match scrutineeType with + | AST.TSum (scrutineeSumTypeName, typeArgs) + when scrutineeSumTypeName = sumTypeName + && List.length typeParams = List.length typeArgs -> + let subst = List.zip typeParams typeArgs |> Map.ofList + substituteTypeForStaticPatternCheck subst payloadTypeTemplate + | _ -> + payloadTypeTemplate + Some payloadType + Some payloadTypeOpt + + let rec patternStaticallyCannotMatchType (pattern: AST.Pattern) (sourceType: AST.Type) : bool = + match pattern with + | AST.PTuple innerPatterns -> + match sourceType with + | AST.TTuple elemTypes -> + if List.length elemTypes <> List.length innerPatterns then + true + else + List.zip innerPatterns elemTypes + |> List.exists (fun (innerPattern, elemType) -> + patternStaticallyCannotMatchType innerPattern elemType) + | AST.TVar _ + | AST.TRuntimeError -> false + | _ -> true + | AST.PRecord _ -> + match sourceType with + | AST.TRecord _ + | AST.TVar _ + | AST.TRuntimeError -> false + | _ -> true + | AST.PConstructor (constructorName, payloadPatternOpt) -> + match sourceType with + | AST.TVar _ + | AST.TRuntimeError -> false + | AST.TSum (sumTypeName, _) -> + match Map.tryFind constructorName variantLookup with + | Some (constructorSumTypeName, _, _, _) when constructorSumTypeName <> sumTypeName -> + true + | Some _ -> + match resolvePayloadTypeForStaticPatternCheck constructorName sourceType with + | Some payloadTypeOpt -> + match payloadPatternOpt, payloadTypeOpt with + | None, None -> false + | Some payloadPattern, Some payloadType -> + patternStaticallyCannotMatchType payloadPattern payloadType + | _ -> true + | None -> false + | None -> false + | _ -> true + | AST.PList innerPatterns -> + match sourceType with + | AST.TList elemType -> + innerPatterns + |> List.exists (fun innerPattern -> + patternStaticallyCannotMatchType innerPattern elemType) + | AST.TVar _ + | AST.TRuntimeError -> false + | _ -> true + | AST.PListCons (headPatterns, tailPattern) -> + match sourceType with + | AST.TList elemType -> + (headPatterns + |> List.exists (fun headPattern -> + patternStaticallyCannotMatchType headPattern elemType)) + || patternStaticallyCannotMatchType tailPattern sourceType + | AST.TVar _ + | AST.TRuntimeError -> false + | _ -> true + | _ -> + false + + let makeFalsePatternCondition + (vg: ANF.VarGen) + : ANF.Atom * (ANF.TempId * ANF.CExpr) list * ANF.VarGen = + let (cmpVar, vg1) = ANF.freshVar vg + let cmpExpr = ANF.Atom (ANF.BoolLiteral false) + (ANF.Var cmpVar, [ (cmpVar, cmpExpr) ], vg1) + + // Collect variable bindings for nested patterns under a value that is already known to match. + // This is used by list/list-cons lowering where structural checks are emitted separately. + let rec collectNestedPatternBindings + (pattern: AST.Pattern) + (sourceAtom: ANF.Atom) + (sourceType: AST.Type) + (env: VarEnv) + (bindings: (ANF.TempId * ANF.CExpr) list) + (vg: ANF.VarGen) + : Result = + match pattern with + | AST.PInt64 _ | AST.PInt128Literal _ + | AST.PInt8Literal _ + | AST.PInt16Literal _ + | AST.PInt32Literal _ + | AST.PUInt8Literal _ + | AST.PUInt16Literal _ + | AST.PUInt32Literal _ + | AST.PUInt64Literal _ | AST.PUInt128Literal _ + | AST.PUnit + | AST.PWildcard + | AST.PBool _ + | AST.PString _ + | AST.PChar _ + | AST.PFloat _ -> + Ok (env, bindings, vg) + | AST.PVar name -> + let (tempId, vg1) = ANF.freshVar vg + let binding = (tempId, ANF.TypedAtom (sourceAtom, sourceType)) + Ok (Map.add name (tempId, sourceType) env, bindings @ [binding], vg1) + | AST.PTuple patterns -> + let tupleElemTypesOpt = + match sourceType with + | AST.TTuple types when List.length types = List.length patterns -> + Some types + | AST.TVar sourceTypeVar -> + Some ( + patterns + |> List.mapi (fun idx _ -> + AST.TVar $"__tuple_elem_{sourceTypeVar}_{idx}") + ) + | AST.TRuntimeError -> + Some ( + patterns + |> List.mapi (fun idx _ -> + AST.TVar $"__tuple_elem_runtime_error_{idx}") + ) + | _ -> + None + + match tupleElemTypesOpt with + | None -> + Ok (env, bindings, vg) + | Some elemTypes -> + let rec loop + (remaining: (AST.Pattern * AST.Type) list) + (idx: int) + (currentEnv: VarEnv) + (currentBindings: (ANF.TempId * ANF.CExpr) list) + (currentVg: ANF.VarGen) + : Result = + match remaining with + | [] -> + Ok (currentEnv, currentBindings, currentVg) + | (pat, elemType) :: rest -> + let (elemVar, vg1) = ANF.freshVar currentVg + let elemExpr = ANF.TupleGet (sourceAtom, idx) + collectNestedPatternBindings pat (ANF.Var elemVar) elemType currentEnv (currentBindings @ [ (elemVar, elemExpr) ]) vg1 + |> Result.bind (fun (env', bindings', vg') -> + loop rest (idx + 1) env' bindings' vg') + + loop (List.zip patterns elemTypes) 0 env bindings vg + | AST.PRecord (recordName, fieldPatterns) -> + let fieldTypesResult : Result = + match sourceType with + | AST.TRecord (_, _) -> + match Map.tryFind recordName typeReg with + | Some fields -> + Ok (fields |> List.map snd) + | None -> + Error $"Unknown record type: {recordName}" + | AST.TVar sourceTypeVar -> + // Preserve unresolved field types when record shape is unknown. + Ok ( + fieldPatterns + |> List.mapi (fun idx _ -> + AST.TVar $"__record_field_{sourceTypeVar}_{idx}") + ) + | _ -> + Error $"Record pattern used on non-record type {typeToString sourceType}" + fieldTypesResult + |> Result.bind (fun fieldTypes -> + let rec loop + (remaining: (string * AST.Pattern) list) + (types: AST.Type list) + (idx: int) + (currentEnv: VarEnv) + (currentBindings: (ANF.TempId * ANF.CExpr) list) + (currentVg: ANF.VarGen) + : Result = + match remaining, types with + | [], _ -> Ok (currentEnv, currentBindings, currentVg) + | (_, pat) :: rest, fieldType :: restTypes -> + let (fieldVar, vg1) = ANF.freshVar currentVg + let fieldExpr = ANF.TupleGet (sourceAtom, idx) + collectNestedPatternBindings pat (ANF.Var fieldVar) fieldType currentEnv (currentBindings @ [(fieldVar, fieldExpr)]) vg1 + |> Result.bind (fun (env', bindings', vg') -> + loop rest restTypes (idx + 1) env' bindings' vg') + | (_, pat) :: rest, [] -> + let (fieldVar, vg1) = ANF.freshVar currentVg + let fieldExpr = ANF.TupleGet (sourceAtom, idx) + let unresolvedFieldType = AST.TVar $"__record_field_missing_{idx}" + collectNestedPatternBindings pat (ANF.Var fieldVar) unresolvedFieldType currentEnv (currentBindings @ [(fieldVar, fieldExpr)]) vg1 + |> Result.bind (fun (env', bindings', vg') -> + loop rest [] (idx + 1) env' bindings' vg') + loop fieldPatterns fieldTypes 0 env bindings vg) + | AST.PConstructor (constructorName, payloadPattern) -> + let rec substituteType (subst: Map) (typ: AST.Type) : AST.Type = + match typ with + | AST.TVar name -> Map.tryFind name subst |> Option.defaultValue typ + | AST.TTuple elems -> AST.TTuple (List.map (substituteType subst) elems) + | AST.TRecord (name, args) -> AST.TRecord (name, List.map (substituteType subst) args) + | AST.TList elem -> AST.TList (substituteType subst elem) + | AST.TDict (k, v) -> AST.TDict (substituteType subst k, substituteType subst v) + | AST.TSum (name, args) -> AST.TSum (name, List.map (substituteType subst) args) + | AST.TFunction (args, ret) -> AST.TFunction (List.map (substituteType subst) args, substituteType subst ret) + | _ -> typ + let resolvePayloadType (constructorName: string) (scrutineeType: AST.Type) : Result = + match Map.tryFind constructorName variantLookup with + | Some (_, typeParams, _, Some payloadTypeTemplate) -> + let payloadType = + match scrutineeType with + | AST.TSum (_, typeArgs) when List.length typeParams = List.length typeArgs -> + let subst = List.zip typeParams typeArgs |> Map.ofList + substituteType subst payloadTypeTemplate + | _ -> payloadTypeTemplate + Ok (Some payloadType) + | Some (_, _, _, None) -> + Ok None + | None -> + Error $"Unknown constructor '{constructorName}' in pattern" + match payloadPattern with + | None -> Ok (env, bindings, vg) + | Some innerPattern -> + resolvePayloadType constructorName sourceType + |> Result.bind (fun payloadType -> + match payloadType with + | None -> + // Constructor arity mismatch behaves as a non-match and + // contributes no payload bindings. + Ok (env, bindings, vg) + | Some concretePayloadType -> + let (payloadVar, vg1) = ANF.freshVar vg + let payloadExpr = ANF.TupleGet (sourceAtom, 1) + collectNestedPatternBindings + innerPattern + (ANF.Var payloadVar) + concretePayloadType + env + (bindings @ [ (payloadVar, payloadExpr) ]) + vg1) + | AST.PList patterns -> + let elemTypeResult = + match sourceType with + | AST.TList t -> Ok t + | AST.TVar sourceTypeVar -> + Ok (AST.TVar $"__list_elem_{sourceTypeVar}") + | AST.TRuntimeError -> + Ok (AST.TVar "__list_elem_runtime_error") + | _ -> + Error $"PList nested binding expects list source type, got {typeToString sourceType}" + elemTypeResult + |> Result.bind (fun elemType -> + let headFuncName = + match elemType with + | AST.TFloat64 -> "Stdlib.List.__headUnsafeFloat" + | _ -> "Stdlib.__FingerTree.headUnsafe_i64" + let rec loop + (remaining: AST.Pattern list) + (currentList: ANF.Atom) + (currentEnv: VarEnv) + (currentBindings: (ANF.TempId * ANF.CExpr) list) + (currentVg: ANF.VarGen) + : Result = + match remaining with + | [] -> Ok (currentEnv, currentBindings, currentVg) + | pat :: rest -> + let (headVar, vg1) = ANF.freshVar currentVg + let headExpr = ANF.Call (headFuncName, [currentList]) + collectNestedPatternBindings pat (ANF.Var headVar) elemType currentEnv (currentBindings @ [(headVar, headExpr)]) vg1 + |> Result.bind (fun (env', bindings', vg') -> + if List.isEmpty rest then + Ok (env', bindings', vg') + else + let (tailVar, vg2) = ANF.freshVar vg' + let tailExpr = ANF.Call ("Stdlib.__FingerTree.tail_i64", [currentList]) + loop rest (ANF.Var tailVar) env' (bindings' @ [(tailVar, tailExpr)]) vg2) + loop patterns sourceAtom env bindings vg) + | AST.PListCons (headPatterns, tailPattern) -> + let elemTypeResult = + match sourceType with + | AST.TList t -> Ok t + | AST.TVar sourceTypeVar -> + Ok (AST.TVar $"__list_elem_{sourceTypeVar}") + | AST.TRuntimeError -> + Ok (AST.TVar "__list_elem_runtime_error") + | _ -> + Error $"PListCons nested binding expects list source type, got {typeToString sourceType}" + elemTypeResult + |> Result.bind (fun elemType -> + let headFuncName = + match elemType with + | AST.TFloat64 -> "Stdlib.List.__headUnsafeFloat" + | _ -> "Stdlib.__FingerTree.headUnsafe_i64" + let rec collectHeads + (remaining: AST.Pattern list) + (currentList: ANF.Atom) + (currentEnv: VarEnv) + (currentBindings: (ANF.TempId * ANF.CExpr) list) + (currentVg: ANF.VarGen) + : Result = + match remaining with + | [] -> Ok (currentEnv, currentBindings, currentList, currentVg) + | pat :: rest -> + let (headVar, vg1) = ANF.freshVar currentVg + let headExpr = ANF.Call (headFuncName, [currentList]) + let (tailVar, vg2) = ANF.freshVar vg1 + let tailExpr = ANF.Call ("Stdlib.__FingerTree.tail_i64", [currentList]) + collectNestedPatternBindings pat (ANF.Var headVar) elemType currentEnv (currentBindings @ [(headVar, headExpr); (tailVar, tailExpr)]) vg2 + |> Result.bind (fun (env', bindings', vg') -> + collectHeads rest (ANF.Var tailVar) env' bindings' vg') + collectHeads headPatterns sourceAtom env bindings vg + |> Result.bind (fun (envAfterHeads, bindingsAfterHeads, tailAtom, vg1) -> + collectNestedPatternBindings tailPattern tailAtom sourceType envAfterHeads bindingsAfterHeads vg1)) + + // Compile a list pattern for FingerTree with proper length validation. + // FingerTree layout: + // SINGLE (tag 1): [node:8] where node is LEAF-tagged + // DEEP (tag 2): [measure:8][prefixCount:8][p0:8][p1:8][p2:8][p3:8][middle:8][suffixCount:8][s0:8][s1:8][s2:8][s3:8] + // LEAF (tag 5): [value:8] + // listType is the list type (TList elemType) for correct pattern variable typing + let compileListPatternWithChecks + (patterns: AST.Pattern list) + (listAtom: ANF.Atom) + (listType: AST.Type) + (currentEnv: VarEnv) + (body: AST.Expr) + (elseExpr: ANF.AExpr) + (vg: ANF.VarGen) + : Result = + + // List patterns on non-list scrutinees are definite non-matches. + // This can happen after grouped-pattern desugaring where non-first alternatives + // were not type-checked against the scrutinee shape. + let elemTypeOpt = + match listType with + | AST.TList t -> Some t + | _ -> None + let elemType = elemTypeOpt |> Option.defaultValue (AST.TVar "__list_elem_unknown") + let isKnownListScrutinee = elemTypeOpt.IsSome + + let patternLen = List.length patterns + + // Helper to unwrap a LEAF node and get the value + let unwrapLeaf (leafTaggedPtr: ANF.Atom) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + let (leafPtrVar, vg1) = ANF.freshVar vg + let leafPtrExpr = ANF.Prim (ANF.BitAnd, leafTaggedPtr, ANF.IntLiteral (ANF.Int64 0xFFFFFFFFFFFFFFF8L)) + let (valueVar, vg2) = ANF.freshVar vg1 + let valueExpr = ANF.RawGet (ANF.Var leafPtrVar, ANF.IntLiteral (ANF.Int64 0L), None) + let newBindings = bindings @ [(leafPtrVar, leafPtrExpr); (valueVar, valueExpr)] + (ANF.Var valueVar, valueVar, newBindings, vg2) + + // Helper to extract tuple elements from a value + // tupleType is the type of the tuple being matched (TTuple elemTypes) + let rec extractTupleBindings + (tupPats: AST.Pattern list) + (tupleAtom: ANF.Atom) + (tupleType: AST.Type) + (idx: int) + (env: VarEnv) + (bindings: (ANF.TempId * ANF.CExpr) list) + (vg: ANF.VarGen) + : Result = + let tupleElemTypesResult = + match tupleType with + | AST.TTuple types when List.length types >= List.length tupPats -> Ok types + | AST.TTuple types -> + Error $"Tuple pattern expects {List.length tupPats} elements but got {List.length types}" + | _ -> + Error $"Tuple pattern expects tuple elements, got {typeToString tupleType}" + match tupleElemTypesResult with + | Error err -> Error err + | Ok tupleElemTypes -> + match tupPats with + | [] -> Ok (env, bindings, vg) + | tupPat :: tupRest -> + let (rawElemVar, vg1) = ANF.freshVar vg + let rawElemExpr = ANF.TupleGet (tupleAtom, idx) + let rawElemBinding = (rawElemVar, rawElemExpr) + let elemT = List.item idx tupleElemTypes + // Wrap with TypedAtom to preserve correct element type in TypeMap + let (elemVar, vg1') = ANF.freshVar vg1 + let elemExpr = ANF.TypedAtom (ANF.Var rawElemVar, elemT) + let elemBinding = (elemVar, elemExpr) + match tupPat with + | AST.PVar name -> + let newEnv = Map.add name (elemVar, elemT) env // Use correct element type + extractTupleBindings tupRest tupleAtom tupleType (idx + 1) newEnv (bindings @ [rawElemBinding; elemBinding]) vg1' + | AST.PWildcard -> + extractTupleBindings tupRest tupleAtom tupleType (idx + 1) env (bindings @ [rawElemBinding]) vg1 + | AST.PInt64 _ | AST.PInt128Literal _ + | AST.PInt8Literal _ + | AST.PInt16Literal _ + | AST.PInt32Literal _ + | AST.PUInt8Literal _ + | AST.PUInt16Literal _ + | AST.PUInt32Literal _ + | AST.PUInt64Literal _ | AST.PUInt128Literal _ + | AST.PUnit + | AST.PConstructor _ + | AST.PBool _ + | AST.PString _ | AST.PChar _ | AST.PFloat _ | AST.PTuple _ | AST.PRecord _ + | AST.PList _ | AST.PListCons _ -> + Error $"Nested pattern in tuple element not yet supported: {tupPat}" + + if not isKnownListScrutinee then + Ok (elseExpr, vg) + elif patternLen = 0 then + // Empty list: check scrutinee == 0 (EMPTY) + let (checkVar, vg1) = ANF.freshVar vg + let checkExpr = ANF.Prim (ANF.Eq, listAtom, ANF.IntLiteral (ANF.Int64 0L)) + toANF body vg1 currentEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg2) -> + let ifExpr = ANF.If (ANF.Var checkVar, bodyExpr, elseExpr) + (ANF.Let (checkVar, checkExpr, ifExpr), vg2)) + elif patternLen = 1 then + // Single element: check tag == 1 (SINGLE), then extract + let (tagVar, vg1) = ANF.freshVar vg + let tagExpr = ANF.Prim (ANF.BitAnd, listAtom, ANF.IntLiteral (ANF.Int64 7L)) + let (checkVar, vg2) = ANF.freshVar vg1 + let checkExpr = ANF.Prim (ANF.Eq, ANF.Var tagVar, ANF.IntLiteral (ANF.Int64 1L)) + + // Untag to get pointer to SINGLE structure + let (ptrVar, vg3) = ANF.freshVar vg2 + let ptrExpr = ANF.Prim (ANF.BitAnd, listAtom, ANF.IntLiteral (ANF.Int64 0xFFFFFFFFFFFFFFF8L)) + // Get the LEAF-tagged node at offset 0 + let (nodeVar, vg4) = ANF.freshVar vg3 + let nodeExpr = ANF.RawGet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 0L), None) + // Unwrap the LEAF to get the value + let (rawValueAtom, rawValueVar, rawBindings, vg5) = unwrapLeaf (ANF.Var nodeVar) vg4 [(ptrVar, ptrExpr); (nodeVar, nodeExpr)] + // Wrap with TypedAtom to preserve element type in TypeMap + let (typedValueVar, vg5') = ANF.freshVar vg5 + let typedValueExpr = ANF.TypedAtom (rawValueAtom, elemType) + let bindings = rawBindings @ [(typedValueVar, typedValueExpr)] + let valueVar = typedValueVar + let valueAtom = ANF.Var typedValueVar + + // Bind the pattern + let pat = List.head patterns + let compileLiteralPattern (literal: ANF.SizedInt) = + // Literal pattern: check tag==SINGLE, extract value, check value==literal + // Important: bindings must come BEFORE the literal check since they define valueVar + let (litCheckVar, vg6) = ANF.freshVar vg5' + let litCheckExpr = ANF.Prim (ANF.Eq, valueAtom, ANF.IntLiteral literal) + toANF body vg6 currentEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg7) -> + // Structure: check tag -> extract value (bindings) -> check literal -> if match then body else else + // Note: We use two nested Ifs because the tag check guards the memory access in bindings + let ifLitExpr = ANF.If (ANF.Var litCheckVar, bodyExpr, elseExpr) + let withLitBinding = ANF.Let (litCheckVar, litCheckExpr, ifLitExpr) + // bindings must be OUTSIDE the inner If to define valueVar before litCheckExpr uses it + let withBindings = wrapBindings bindings withLitBinding + let withTagCheck = ANF.If (ANF.Var checkVar, withBindings, elseExpr) + (ANF.Let (tagVar, tagExpr, ANF.Let (checkVar, checkExpr, withTagCheck)), vg7)) + + let compileStringLiteralPattern (literalText: string) = + // Int128/UInt128 list elements are lowered as canonical decimal strings. + let (litCheckVar, vg6) = ANF.freshVar vg5' + let litCheckExpr = ANF.Call ("__string_eq", [valueAtom; ANF.StringLiteral literalText]) + toANF body vg6 currentEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg7) -> + let ifLitExpr = ANF.If (ANF.Var litCheckVar, bodyExpr, elseExpr) + let withLitBinding = ANF.Let (litCheckVar, litCheckExpr, ifLitExpr) + let withBindings = wrapBindings bindings withLitBinding + let withTagCheck = ANF.If (ANF.Var checkVar, withBindings, elseExpr) + (ANF.Let (tagVar, tagExpr, ANF.Let (checkVar, checkExpr, withTagCheck)), vg7)) + + match pat with + | AST.PVar name -> + let newEnv = Map.add name (valueVar, elemType) currentEnv // Use element type + toANF body vg5' newEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg6) -> + let withBindings = wrapBindings bindings bodyExpr + let ifExpr = ANF.If (ANF.Var checkVar, withBindings, elseExpr) + (ANF.Let (tagVar, tagExpr, ANF.Let (checkVar, checkExpr, ifExpr)), vg6)) + | AST.PWildcard -> + toANF body vg5' currentEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg6) -> + let withBindings = wrapBindings bindings bodyExpr + let ifExpr = ANF.If (ANF.Var checkVar, withBindings, elseExpr) + (ANF.Let (tagVar, tagExpr, ANF.Let (checkVar, checkExpr, ifExpr)), vg6)) + | AST.PTuple innerPatterns -> + extractTupleBindings innerPatterns valueAtom elemType 0 currentEnv bindings vg5' // Pass tuple type + |> Result.bind (fun (newEnv, newBindings, vg6) -> + toANF body vg6 newEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg7) -> + let withBindings = wrapBindings newBindings bodyExpr + let ifExpr = ANF.If (ANF.Var checkVar, withBindings, elseExpr) + (ANF.Let (tagVar, tagExpr, ANF.Let (checkVar, checkExpr, ifExpr)), vg7))) + | AST.PInt64 n -> compileLiteralPattern (ANF.Int64 n) + | AST.PInt128Literal n -> compileStringLiteralPattern (int128ToCanonicalString n) + | AST.PInt8Literal n -> compileLiteralPattern (ANF.Int8 n) + | AST.PInt16Literal n -> compileLiteralPattern (ANF.Int16 n) + | AST.PInt32Literal n -> compileLiteralPattern (ANF.Int32 n) + | AST.PUInt8Literal n -> compileLiteralPattern (ANF.UInt8 n) + | AST.PUInt16Literal n -> compileLiteralPattern (ANF.UInt16 n) + | AST.PUInt32Literal n -> compileLiteralPattern (ANF.UInt32 n) + | AST.PUInt64Literal n -> compileLiteralPattern (ANF.UInt64 n) + | AST.PUInt128Literal n -> compileStringLiteralPattern (uint128ToCanonicalString n) + | AST.PConstructor _ | AST.PList _ | AST.PListCons _ -> + Error "Nested pattern in list element not yet supported" + | _ -> + Error $"Unsupported pattern in single-element list: {pat}" + else + // Multiple elements: check length == patternLen (safe for all list types) + let (lengthVar, vg1) = ANF.freshVar vg + let lengthName = + match elemType with + | AST.TFloat64 -> "Stdlib.__FingerTree.__lengthFloat" + | _ -> "Stdlib.__FingerTree.length_i64" + let lengthExpr = ANF.Call (lengthName, [listAtom]) + let (checkVar, vg2) = ANF.freshVar vg1 + let checkExpr = ANF.Prim (ANF.Eq, ANF.Var lengthVar, ANF.IntLiteral (ANF.Int64 (int64 patternLen))) + // Untag to get pointer (only used in then-branch after length check passes) + let (ptrVar, vg3) = ANF.freshVar vg2 + let ptrExpr = ANF.Prim (ANF.BitAnd, listAtom, ANF.IntLiteral (ANF.Int64 0xFFFFFFFFFFFFFFF8L)) + + // Note: lengthExpr and checkExpr are safe (length handles EMPTY) + // ptrExpr just does bitwise and, doesn't dereference + let headerBindings = [(lengthVar, lengthExpr); (checkVar, checkExpr); (ptrVar, ptrExpr)] + let vg6 = vg3 // Keep consistent naming for the rest of the code + + // Extract elements using getAt (handles varying prefix/suffix layouts) + // Returns: (env, bindings, conditionAtoms, vg) + let rec extractElements + (pats: AST.Pattern list) + (idx: int) + (env: VarEnv) + (bindings: (ANF.TempId * ANF.CExpr) list) + (condAtoms: ANF.Atom list) + (vg: ANF.VarGen) + : Result = + match pats with + | [] -> Ok (env, bindings, condAtoms, vg) + | pat :: rest -> + // Use getAt to retrieve element at this index + // getAt returns Option, but we know length == patternLen so it's always Some + // Select a type-specific wrapper to avoid defaulting to Int64 for floats. + // Monomorphization happens at AST level, so we must use a non-generic wrapper here. + let (optVar, vg1) = ANF.freshVar vg + let getAtName = + match elemType with + | AST.TFloat64 -> "Stdlib.List.__getAtFloat" + | _ -> "Stdlib.List.__getAtInt64" + let getAtExpr = ANF.Call (getAtName, [listAtom; ANF.IntLiteral (ANF.Int64 (int64 idx))]) + // Unwrap the Some - getAt returns tagged value with tag 1 for Some + let (rawValueVar, vg2) = ANF.freshVar vg1 + let valueType = + match elemType with + | AST.TFloat64 -> Some AST.TFloat64 + | _ -> None + let rawValueExpr = ANF.RawGet (ANF.Var optVar, ANF.IntLiteral (ANF.Int64 8L), valueType) // Some payload at offset 8 + // Wrap with TypedAtom to preserve element type in TypeMap + let (typedValueVar, vg2') = ANF.freshVar vg2 + let typedValueExpr = ANF.TypedAtom (ANF.Var rawValueVar, elemType) + let newBindings = bindings @ [(optVar, getAtExpr); (rawValueVar, rawValueExpr); (typedValueVar, typedValueExpr)] + let valueVar = typedValueVar + + match pat with + | AST.PVar name -> + let newEnv = Map.add name (valueVar, elemType) env // Use element type + extractElements rest (idx + 1) newEnv newBindings condAtoms vg2' + | AST.PWildcard -> + extractElements rest (idx + 1) env newBindings condAtoms vg2' + | AST.PTuple innerPatterns -> + extractTupleBindings innerPatterns (ANF.Var valueVar) elemType 0 env newBindings vg2' // Pass tuple type + |> Result.bind (fun (tupEnv, tupBindings, vg3) -> + extractElements rest (idx + 1) tupEnv tupBindings condAtoms vg3) + | (AST.PInt64 _ as pat) + | (AST.PInt8Literal _ as pat) + | (AST.PInt16Literal _ as pat) + | (AST.PInt32Literal _ as pat) + | (AST.PUInt8Literal _ as pat) + | (AST.PUInt16Literal _ as pat) + | (AST.PUInt32Literal _ as pat) + | (AST.PUInt64Literal _ as pat) -> + let literal = + match patternLiteralToSizedInt pat with + | Some value -> value + | None -> Crash.crash $"Expected integer literal pattern, got {pat}" + let (litCheckVar, vg3) = ANF.freshVar vg2' + let litCheckExpr = ANF.Prim (ANF.Eq, ANF.Var valueVar, ANF.IntLiteral literal) + let bindingsWithLiteral = newBindings @ [(litCheckVar, litCheckExpr)] + extractElements rest (idx + 1) env bindingsWithLiteral (condAtoms @ [ANF.Var litCheckVar]) vg3 + | AST.PInt128Literal n -> + let (litCheckVar, vg3) = ANF.freshVar vg2' + let litCheckExpr = + ANF.Call ("__string_eq", [ANF.Var valueVar; ANF.StringLiteral (int128ToCanonicalString n)]) + let bindingsWithLiteral = newBindings @ [(litCheckVar, litCheckExpr)] + extractElements rest (idx + 1) env bindingsWithLiteral (condAtoms @ [ANF.Var litCheckVar]) vg3 + | AST.PUInt128Literal n -> + let (litCheckVar, vg3) = ANF.freshVar vg2' + let litCheckExpr = + ANF.Call ("__string_eq", [ANF.Var valueVar; ANF.StringLiteral (uint128ToCanonicalString n)]) + let bindingsWithLiteral = newBindings @ [(litCheckVar, litCheckExpr)] + extractElements rest (idx + 1) env bindingsWithLiteral (condAtoms @ [ANF.Var litCheckVar]) vg3 + | AST.PList _ | AST.PListCons _ | AST.PConstructor _ -> + let staticallyCannotMatch = patternStaticallyCannotMatchType pat elemType + let cmpResult = + if staticallyCannotMatch then + let (condAtom, bindings', vg3) = makeFalsePatternCondition vg2' + Ok (Some (condAtom, bindings', vg3)) + else + buildPatternComparison pat (ANF.Var valueVar) vg2' + cmpResult + |> Result.bind (fun cmpOpt -> + let (cmpCondOpt, cmpBindings, vg3) = + match cmpOpt with + | None -> (None, [], vg2') + | Some (condAtom, bindings', vg') -> (Some condAtom, bindings', vg') + let nestedBindingsResult = + if patternBindsVariables pat && not staticallyCannotMatch then + collectNestedPatternBindings pat (ANF.Var valueVar) elemType env [] vg3 + else + Ok (env, [], vg3) + nestedBindingsResult + |> Result.bind (fun (envAfterPat, nestedBindings, vg4) -> + let condAtoms' = + match cmpCondOpt with + | None -> condAtoms + | Some condAtom -> condAtoms @ [condAtom] + let newBindingsWithPat = newBindings @ cmpBindings @ nestedBindings + extractElements rest (idx + 1) envAfterPat newBindingsWithPat condAtoms' vg4)) + | _ -> + Error $"Unsupported pattern in list element: {pat}" + + extractElements patterns 0 currentEnv [] [] vg6 + |> Result.bind (fun (newEnv, elemBindings, condAtoms, vg7) -> + toANF body vg7 newEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg8) -> + // Build the inner expression based on whether we have extra conditions + let (innerExpr, vg9) = + match condAtoms with + | [] -> + // No extra conditions - just return body + (bodyExpr, vg8) + | checks -> + // AND condition atoms together (length check is handled separately by checkVar) + let rec buildCombinedChecks + (remaining: ANF.Atom list) + (accBindings: (ANF.TempId * ANF.CExpr) list) + (prevCond: ANF.Atom option) + (vg: ANF.VarGen) + : ANF.Atom * (ANF.TempId * ANF.CExpr) list * ANF.VarGen = + match remaining with + | [] -> + match prevCond with + | Some cond -> (cond, accBindings, vg) + | None -> (ANF.BoolLiteral true, accBindings, vg) + | condAtom :: rest -> + match prevCond with + | None -> + buildCombinedChecks rest accBindings (Some condAtom) vg + | Some prevCondAtom -> + let (combinedVar, vg1) = ANF.freshVar vg + let combinedExpr = ANF.Prim (ANF.And, prevCondAtom, condAtom) + buildCombinedChecks rest (accBindings @ [(combinedVar, combinedExpr)]) (Some (ANF.Var combinedVar)) vg1 + let (combinedCondAtom, condBindings, vg9') = buildCombinedChecks checks [] None vg8 + let checkedBody = ANF.If (combinedCondAtom, bodyExpr, elseExpr) + let withCondBindings = wrapBindings condBindings checkedBody + (withCondBindings, vg9') + // Wrap with element bindings (inside length check) + let withElemBindings = wrapBindings elemBindings innerExpr + // Wrap with length check + let ifExpr = ANF.If (ANF.Var checkVar, withElemBindings, elseExpr) + let withHeader = wrapBindings headerBindings ifExpr + (withHeader, vg9))) + + // Compile a list cons pattern [h, ...t] for FingerTree + // This pattern extracts head element(s) and binds the rest to tail + // For FingerTree: + // - SINGLE (tag 1): head is the element, tail is EMPTY + // - DEEP (tag 2): head is prefix[0], tail requires calling FingerTree.tail + // listType is the list type (TList elemType) for correct pattern variable typing + let rec compileListConsPatternWithChecks + (headPatterns: AST.Pattern list) + (tailPattern: AST.Pattern) + (listAtom: ANF.Atom) + (listType: AST.Type) + (currentEnv: VarEnv) + (body: AST.Expr) + (elseExpr: ANF.AExpr) + (vg: ANF.VarGen) + : Result = + + // Extract element type from list type + let elemTypeResult : Result = + match listType with + | AST.TList t -> Ok t + | _ -> + Error $"List cons pattern expects TList scrutinee, got {typeToString listType}" + + elemTypeResult + |> Result.bind (fun elemType -> + // Use _i64 versions which work for any element type at runtime (all values are 64-bit) + // The correct element type is tracked in the VarEnv/TypeMap, not in the function name + + // Helper to unwrap a LEAF node and get the value + let unwrapLeaf (leafTaggedPtr: ANF.Atom) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + let (leafPtrVar, vg1) = ANF.freshVar vg + let leafPtrExpr = ANF.Prim (ANF.BitAnd, leafTaggedPtr, ANF.IntLiteral (ANF.Int64 0xFFFFFFFFFFFFFFF8L)) + let (valueVar, vg2) = ANF.freshVar vg1 + let valueExpr = ANF.RawGet (ANF.Var leafPtrVar, ANF.IntLiteral (ANF.Int64 0L), None) + let newBindings = bindings @ [(leafPtrVar, leafPtrExpr); (valueVar, valueExpr)] + (ANF.Var valueVar, valueVar, newBindings, vg2) + + // Helper to extract tuple elements + // tupleType is the type of the tuple being matched (TTuple elemTypes) + let rec extractTupleBindings + (tupPats: AST.Pattern list) + (tupleAtom: ANF.Atom) + (tupleType: AST.Type) + (idx: int) + (env: VarEnv) + (bindings: (ANF.TempId * ANF.CExpr) list) + (vg: ANF.VarGen) + : Result = + // Extract element types from tuple type + let elemTypes = + match tupleType with + | AST.TTuple types -> types + | _ -> Crash.crash $"Tuple head pattern expects tuple element type, got {typeToString tupleType}" + match tupPats with + | [] -> Ok (env, bindings, vg) + | tupPat :: tupRest -> + let (rawElemVar, vg1) = ANF.freshVar vg + let rawElemExpr = ANF.TupleGet (tupleAtom, idx) + let rawElemBinding = (rawElemVar, rawElemExpr) + let elemT = + if idx < List.length elemTypes then + List.item idx elemTypes + else + Crash.crash + $"Tuple head pattern arity mismatch: requested index {idx}, tuple has {List.length elemTypes} elements" + // Wrap with TypedAtom to preserve correct element type in TypeMap + let (elemVar, vg1') = ANF.freshVar vg1 + let elemExpr = ANF.TypedAtom (ANF.Var rawElemVar, elemT) + let elemBinding = (elemVar, elemExpr) + match tupPat with + | AST.PVar name -> + let newEnv = Map.add name (elemVar, elemT) env + extractTupleBindings tupRest tupleAtom tupleType (idx + 1) newEnv (bindings @ [rawElemBinding; elemBinding]) vg1' + | AST.PWildcard -> + // Even for wildcard, we need to extract the element (for proper tuple access) + // but don't bind it to a name. Just add the raw binding and continue. + extractTupleBindings tupRest tupleAtom tupleType (idx + 1) env (bindings @ [rawElemBinding]) vg1 + | _ -> + Error $"Nested pattern in tuple element not yet supported: {tupPat}" + + let tupleHeadPatternType + (candidateElemType: AST.Type) + (patterns: AST.Pattern list) + : AST.Type option = + match candidateElemType with + | AST.TTuple elemTypes when List.length elemTypes = List.length patterns -> + Some candidateElemType + | AST.TVar tupleTypeVar -> + let unresolvedElemTypes = + patterns + |> List.mapi (fun idx _ -> + AST.TVar $"__tuple_elem_{tupleTypeVar}_{idx}") + Some (AST.TTuple unresolvedElemTypes) + | AST.TRuntimeError -> + let unresolvedElemTypes = + patterns + |> List.mapi (fun idx _ -> + AST.TVar $"__tuple_elem_runtime_error_{idx}") + Some (AST.TTuple unresolvedElemTypes) + | _ -> + None + + match headPatterns with + | [] -> + // All head elements extracted - bind tail and compile body + match tailPattern with + | AST.PVar name -> + let (tailVar, vg1) = ANF.freshVar vg + let newEnv = Map.add name (tailVar, listType) currentEnv // Use actual list type + toANF body vg1 newEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg2) -> + let withTail = ANF.Let (tailVar, ANF.Atom listAtom, bodyExpr) + (withTail, vg2)) + | AST.PWildcard -> + toANF body vg currentEnv typeReg variantLookup funcReg moduleRegistry + | _ -> Error "Tail pattern in list cons must be variable or wildcard" + + | [singleHeadPattern] -> + // Single head pattern [h, ...t] - most common case + // Use branching based on tag to handle SINGLE vs DEEP nodes + + // Check list is not empty + let (notEmptyVar, vg1) = ANF.freshVar vg + let notEmptyExpr = ANF.Prim (ANF.Neq, listAtom, ANF.IntLiteral (ANF.Int64 0L)) + + // Get tag + let (tagVar, vg2) = ANF.freshVar vg1 + let tagExpr = ANF.Prim (ANF.BitAnd, listAtom, ANF.IntLiteral (ANF.Int64 7L)) + + // Untag to get pointer + let (ptrVar, vg3) = ANF.freshVar vg2 + let ptrExpr = ANF.Prim (ANF.BitAnd, listAtom, ANF.IntLiteral (ANF.Int64 0xFFFFFFFFFFFFFFF8L)) + + // Check if SINGLE (tag 1) + let (isSingleVar, vg4) = ANF.freshVar vg3 + let isSingleExpr = ANF.Prim (ANF.Eq, ANF.Var tagVar, ANF.IntLiteral (ANF.Int64 1L)) + + // notEmptyVar must be bound OUTSIDE the If since it's used as the condition + let condBindings = [(notEmptyVar, notEmptyExpr)] + let innerBindings = [(tagVar, tagExpr); (ptrVar, ptrExpr); (isSingleVar, isSingleExpr)] + + // Compile the SINGLE branch: node at offset 0, tail = EMPTY + let compileSingleBranch vg = + let (singleNodeVar, vg1) = ANF.freshVar vg + let singleNodeExpr = ANF.RawGet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 0L), None) + let (headAtom, headVar, headBindings, vg2) = unwrapLeaf (ANF.Var singleNodeVar) vg1 [(singleNodeVar, singleNodeExpr)] + // Wrap headVar with TypedAtom to preserve correct element type in TypeMap + let (typedHeadVar, vg2') = ANF.freshVar vg2 + let typedHeadExpr = ANF.TypedAtom (ANF.Var headVar, elemType) + let typedHeadBinding = (typedHeadVar, typedHeadExpr) + let headBindingsWithType = headBindings @ [typedHeadBinding] + let typedHeadAtom = ANF.Var typedHeadVar + // Tail is empty list (0 = EMPTY sentinel) - wrap with TypedAtom to preserve list type + let (rawTailVar, vg3) = ANF.freshVar vg2' + let rawTailExpr = ANF.Atom (ANF.IntLiteral (ANF.Int64 0L)) // EMPTY + let (tailVar, vg3') = ANF.freshVar vg3 + let tailExpr = ANF.TypedAtom (ANF.Var rawTailVar, listType) + + // Bind head pattern - returns (env, tupleBindings, vg, guardOpt) + // guardOpt is Some(var, expr) for literal patterns that need comparison + let headEnvResult = + match singleHeadPattern with + | AST.PVar name -> Ok (Map.add name (typedHeadVar, elemType) currentEnv, [], vg3', None) // Use typed head var with element type + | AST.PWildcard -> Ok (currentEnv, [], vg3', None) + | AST.PTuple innerPatterns -> + match tupleHeadPatternType elemType innerPatterns with + | Some tupleType -> + extractTupleBindings innerPatterns typedHeadAtom tupleType 0 currentEnv [] vg3' + |> Result.map (fun (env, bindings, vg') -> (env, bindings, vg', None)) + | None -> + let (guardVar, vg4) = ANF.freshVar vg3' + Ok (currentEnv, [], vg4, Some (guardVar, ANF.Atom (ANF.BoolLiteral false))) + | (AST.PInt64 _ as pat) + | (AST.PInt8Literal _ as pat) + | (AST.PInt16Literal _ as pat) + | (AST.PInt32Literal _ as pat) + | (AST.PUInt8Literal _ as pat) + | (AST.PUInt16Literal _ as pat) + | (AST.PUInt32Literal _ as pat) + | (AST.PUInt64Literal _ as pat) -> + // Compare head value to literal - guard check + let (guardVar, vg4) = ANF.freshVar vg3' + let literal = + match patternLiteralToSizedInt pat with + | Some value -> value + | None -> Crash.crash $"Expected integer literal pattern, got {pat}" + let guardExpr = ANF.Prim (ANF.Eq, ANF.Var typedHeadVar, ANF.IntLiteral literal) + Ok (currentEnv, [], vg4, Some (guardVar, guardExpr)) + | AST.PInt128Literal n -> + let (guardVar, vg4) = ANF.freshVar vg3' + let guardExpr = + ANF.Call ("__string_eq", [ANF.Var typedHeadVar; ANF.StringLiteral (int128ToCanonicalString n)]) + Ok (currentEnv, [], vg4, Some (guardVar, guardExpr)) + | AST.PUInt128Literal n -> + let (guardVar, vg4) = ANF.freshVar vg3' + let guardExpr = + ANF.Call ("__string_eq", [ANF.Var typedHeadVar; ANF.StringLiteral (uint128ToCanonicalString n)]) + Ok (currentEnv, [], vg4, Some (guardVar, guardExpr)) + | AST.PConstructor _ -> + Error "Nested pattern in list cons element not yet supported" + | _ -> Error $"Unsupported head pattern in list cons: {singleHeadPattern}" + + headEnvResult + |> Result.bind (fun (envWithHead, tupleBindings, vg4, guardOpt) -> + let tailEnvResult = + match tailPattern with + | AST.PVar name -> Ok (Map.add name (tailVar, listType) envWithHead, vg4) // Use actual list type + | AST.PWildcard -> Ok (envWithHead, vg4) + | _ -> Error "Tail pattern must be variable or wildcard" + + tailEnvResult + |> Result.bind (fun (finalEnv, vg5) -> + toANF body vg5 finalEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg6) -> + let withTupleBindings = wrapBindings tupleBindings bodyExpr + let withTypedTail = ANF.Let (tailVar, tailExpr, withTupleBindings) + let withTail = ANF.Let (rawTailVar, rawTailExpr, withTypedTail) + // If there's a guard (literal pattern), add check AFTER head bindings + // because guardExpr uses headVar which is defined in headBindings + let withGuard = + match guardOpt with + | Some (guardVar, guardExpr) -> + // headBindingsWithType -> guardVar -> if guard then body else elseExpr + let ifGuard = ANF.If (ANF.Var guardVar, withTail, elseExpr) + let withGuardBinding = ANF.Let (guardVar, guardExpr, ifGuard) + wrapBindings headBindingsWithType withGuardBinding + | None -> wrapBindings headBindingsWithType withTail + (withGuard, vg6)))) + + // Compile the DEEP branch: node at offset 16 (prefix[0]) + // For tail, call Stdlib.__FingerTree.tail to properly compute the tail + let compileDeepBranch vg = + let (deepNodeVar, vg1) = ANF.freshVar vg + let deepNodeExpr = ANF.RawGet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 16L), None) + let (headAtom, headVar, headBindings, vg2) = unwrapLeaf (ANF.Var deepNodeVar) vg1 [(deepNodeVar, deepNodeExpr)] + // Wrap headVar with TypedAtom to preserve correct element type in TypeMap + let (typedHeadVar, vg2') = ANF.freshVar vg2 + let typedHeadExpr = ANF.TypedAtom (ANF.Var headVar, elemType) + let typedHeadBinding = (typedHeadVar, typedHeadExpr) + let headBindingsWithType = headBindings @ [typedHeadBinding] + let typedHeadAtom = ANF.Var typedHeadVar + + // Call Stdlib.__FingerTree.tail to get the tail + let (tailResultVar, vg3) = ANF.freshVar vg2' + let tailCallExpr = ANF.Call ("Stdlib.__FingerTree.tail_i64", [listAtom]) + // Wrap with TypedAtom to preserve correct list type in TypeMap + let (typedTailVar, vg3') = ANF.freshVar vg3 + let typedTailExpr = ANF.TypedAtom (ANF.Var tailResultVar, listType) + + let tailBindings = [(tailResultVar, tailCallExpr); (typedTailVar, typedTailExpr)] + + // Bind head pattern - returns (env, tupleBindings, vg, guardOpt) + let headEnvResult = + match singleHeadPattern with + | AST.PVar name -> Ok (Map.add name (typedHeadVar, elemType) currentEnv, [], vg3', None) // Use typed head var with element type + | AST.PWildcard -> Ok (currentEnv, [], vg3', None) + | AST.PTuple innerPatterns -> + match tupleHeadPatternType elemType innerPatterns with + | Some tupleType -> + extractTupleBindings innerPatterns typedHeadAtom tupleType 0 currentEnv [] vg3' + |> Result.map (fun (env, bindings, vg') -> (env, bindings, vg', None)) + | None -> + let (guardVar, vg4) = ANF.freshVar vg3' + Ok (currentEnv, [], vg4, Some (guardVar, ANF.Atom (ANF.BoolLiteral false))) + | (AST.PInt64 _ as pat) + | (AST.PInt8Literal _ as pat) + | (AST.PInt16Literal _ as pat) + | (AST.PInt32Literal _ as pat) + | (AST.PUInt8Literal _ as pat) + | (AST.PUInt16Literal _ as pat) + | (AST.PUInt32Literal _ as pat) + | (AST.PUInt64Literal _ as pat) -> + // Compare head value to literal - guard check + let (guardVar, vg4) = ANF.freshVar vg3' + let literal = + match patternLiteralToSizedInt pat with + | Some value -> value + | None -> Crash.crash $"Expected integer literal pattern, got {pat}" + let guardExpr = ANF.Prim (ANF.Eq, ANF.Var typedHeadVar, ANF.IntLiteral literal) + Ok (currentEnv, [], vg4, Some (guardVar, guardExpr)) + | AST.PInt128Literal n -> + let (guardVar, vg4) = ANF.freshVar vg3' + let guardExpr = + ANF.Call ("__string_eq", [ANF.Var typedHeadVar; ANF.StringLiteral (int128ToCanonicalString n)]) + Ok (currentEnv, [], vg4, Some (guardVar, guardExpr)) + | AST.PUInt128Literal n -> + let (guardVar, vg4) = ANF.freshVar vg3' + let guardExpr = + ANF.Call ("__string_eq", [ANF.Var typedHeadVar; ANF.StringLiteral (uint128ToCanonicalString n)]) + Ok (currentEnv, [], vg4, Some (guardVar, guardExpr)) + | AST.PConstructor _ -> + Error "Nested pattern in list cons element not yet supported" + | _ -> Error $"Unsupported head pattern in list cons: {singleHeadPattern}" + + headEnvResult + |> Result.bind (fun (envWithHead, tupleBindings, vg4, guardOpt) -> + let tailEnvResult = + match tailPattern with + | AST.PVar name -> Ok (Map.add name (typedTailVar, listType) envWithHead, vg4) // Use typed tail var with correct list type + | AST.PWildcard -> Ok (envWithHead, vg4) + | _ -> Error "Tail pattern must be variable or wildcard" + + tailEnvResult + |> Result.bind (fun (finalEnv, vg5) -> + toANF body vg5 finalEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg6) -> + let withTupleBindings = wrapBindings tupleBindings bodyExpr + let withTailBinding = wrapBindings tailBindings withTupleBindings + // If there's a guard (literal pattern), add check AFTER head bindings + // because guardExpr uses headVar which is defined in headBindingsWithType + let withGuard = + match guardOpt with + | Some (guardVar, guardExpr) -> + // headBindingsWithType -> guardVar -> if guard then body else elseExpr + let ifGuard = ANF.If (ANF.Var guardVar, withTailBinding, elseExpr) + let withGuardBinding = ANF.Let (guardVar, guardExpr, ifGuard) + wrapBindings headBindingsWithType withGuardBinding + | None -> wrapBindings headBindingsWithType withTailBinding + (withGuard, vg6)))) + + // Build the combined expression with branching + compileSingleBranch vg4 + |> Result.bind (fun (singleBranchExpr, vg5) -> + compileDeepBranch vg5 + |> Result.map (fun (deepBranchExpr, vg6) -> + // If SINGLE then singleBranch else deepBranch + let tagBranchExpr = ANF.If (ANF.Var isSingleVar, singleBranchExpr, deepBranchExpr) + // Wrap inner bindings (tag, ptr, isSingle) around the tag branch + let withInnerBindings = wrapBindings innerBindings tagBranchExpr + // If not empty then execute inner bindings + branch else elseExpr + let ifExpr = ANF.If (ANF.Var notEmptyVar, withInnerBindings, elseExpr) + // Bind notEmptyVar BEFORE the If + let finalExpr = wrapBindings condBindings ifExpr + (finalExpr, vg6))) + + | _ -> + // Multiple head patterns [a, b, ...t] + // Check length >= number of head patterns + let numHeads = List.length headPatterns + let (lengthVar, vg1) = ANF.freshVar vg + let lengthName = + match elemType with + | AST.TFloat64 -> "Stdlib.__FingerTree.__lengthFloat" + | _ -> "Stdlib.__FingerTree.length_i64" + let lengthExpr = ANF.Call (lengthName, [listAtom]) + let (lengthCheckVar, vg2) = ANF.freshVar vg1 + let lengthCheckExpr = ANF.Prim (ANF.Gte, ANF.Var lengthVar, ANF.IntLiteral (ANF.Int64 (int64 numHeads))) + + // Extract head elements and final tail using head/tail calls + // Use _i64 versions which work for any element type at runtime (all values are 64-bit) + // The correct element type is tracked in the VarEnv/TypeMap, not in the function name + let rec extractElements + (pats: AST.Pattern list) + (currentListVar: ANF.TempId) + (env: VarEnv) + (bindings: (ANF.TempId * ANF.CExpr) list) + (condAtoms: ANF.Atom list) + (vg: ANF.VarGen) + : Result = + match pats with + | [] -> + // No more head patterns, currentListVar is the tail + Ok (env, bindings, currentListVar, condAtoms, vg) + | pat :: rest -> + // Call head to get current element + let (headResultVar, vg1) = ANF.freshVar vg + let headCallName = + match elemType with + | AST.TFloat64 -> "Stdlib.List.__headUnsafeFloat" + | _ -> "Stdlib.__FingerTree.headUnsafe_i64" + let headCallExpr = ANF.Call (headCallName, [ANF.Var currentListVar]) + // Call tail to get rest + let (tailResultVar, vg2) = ANF.freshVar vg1 + let tailCallExpr = ANF.Call ("Stdlib.__FingerTree.tail_i64", [ANF.Var currentListVar]) + // Preserve type information for both head and tail values. + let (typedHeadVar, vg2') = ANF.freshVar vg2 + let typedHeadExpr = ANF.TypedAtom (ANF.Var headResultVar, elemType) + let (typedTailVar, vg2'') = ANF.freshVar vg2' + let typedTailExpr = ANF.TypedAtom (ANF.Var tailResultVar, listType) + let newBindings = + bindings + @ [ + (headResultVar, headCallExpr) + (typedHeadVar, typedHeadExpr) + (tailResultVar, tailCallExpr) + (typedTailVar, typedTailExpr) + ] + + match pat with + | AST.PVar name -> + let newEnv = Map.add name (typedHeadVar, elemType) env + extractElements rest typedTailVar newEnv newBindings condAtoms vg2'' + | AST.PWildcard -> + extractElements rest typedTailVar env newBindings condAtoms vg2'' + | (AST.PInt64 _ as litPat) + | (AST.PInt8Literal _ as litPat) + | (AST.PInt16Literal _ as litPat) + | (AST.PInt32Literal _ as litPat) + | (AST.PUInt8Literal _ as litPat) + | (AST.PUInt16Literal _ as litPat) + | (AST.PUInt32Literal _ as litPat) + | (AST.PUInt64Literal _ as litPat) -> + let literal = + match patternLiteralToSizedInt litPat with + | Some value -> value + | None -> Crash.crash $"Expected integer literal pattern, got {litPat}" + let (litCheckVar, vg3) = ANF.freshVar vg2'' + let litCheckExpr = ANF.Prim (ANF.Eq, ANF.Var typedHeadVar, ANF.IntLiteral literal) + let bindingsWithCheck = newBindings @ [(litCheckVar, litCheckExpr)] + extractElements rest typedTailVar env bindingsWithCheck (condAtoms @ [ANF.Var litCheckVar]) vg3 + | AST.PInt128Literal n -> + let (litCheckVar, vg3) = ANF.freshVar vg2'' + let litCheckExpr = + ANF.Call ("__string_eq", [ANF.Var typedHeadVar; ANF.StringLiteral (int128ToCanonicalString n)]) + let bindingsWithCheck = newBindings @ [(litCheckVar, litCheckExpr)] + extractElements rest typedTailVar env bindingsWithCheck (condAtoms @ [ANF.Var litCheckVar]) vg3 + | AST.PUInt128Literal n -> + let (litCheckVar, vg3) = ANF.freshVar vg2'' + let litCheckExpr = + ANF.Call ("__string_eq", [ANF.Var typedHeadVar; ANF.StringLiteral (uint128ToCanonicalString n)]) + let bindingsWithCheck = newBindings @ [(litCheckVar, litCheckExpr)] + extractElements rest typedTailVar env bindingsWithCheck (condAtoms @ [ANF.Var litCheckVar]) vg3 + | AST.PConstructor _ | AST.PList _ | AST.PListCons _ -> + let staticallyCannotMatch = patternStaticallyCannotMatchType pat elemType + let cmpResult = + if staticallyCannotMatch then + let (condAtom, bindings', vg3) = makeFalsePatternCondition vg2'' + Ok (Some (condAtom, bindings', vg3)) + else + buildPatternComparison pat (ANF.Var typedHeadVar) vg2'' + cmpResult + |> Result.bind (fun cmpOpt -> + let (cmpCondOpt, cmpBindings, vg3) = + match cmpOpt with + | None -> (None, [], vg2'') + | Some (condAtom, bindings', vg') -> (Some condAtom, bindings', vg') + let nestedBindingsResult = + if patternBindsVariables pat && not staticallyCannotMatch then + collectNestedPatternBindings pat (ANF.Var typedHeadVar) elemType env [] vg3 + else + Ok (env, [], vg3) + nestedBindingsResult + |> Result.bind (fun (envAfterPat, nestedBindings, vg4) -> + let condAtoms' = + match cmpCondOpt with + | None -> condAtoms + | Some condAtom -> condAtoms @ [condAtom] + let bindingsWithPat = newBindings @ cmpBindings @ nestedBindings + extractElements rest typedTailVar envAfterPat bindingsWithPat condAtoms' vg4)) + | _ -> + Error $"Unsupported head pattern in multi-element list cons: {pat}" + + // Get initial list variable + let (initialListVar, vg3) = ANF.freshVar vg2 + let initialListExpr = ANF.Atom listAtom + + extractElements headPatterns initialListVar currentEnv [(initialListVar, initialListExpr)] [] vg3 + |> Result.bind (fun (envAfterHeads, headBindings, finalTailVar, headCondAtoms, vg4) -> + // Bind/check tail pattern + let tailResult : Result = + match tailPattern with + | AST.PVar name -> + Ok (Map.add name (finalTailVar, listType) envAfterHeads, [], [], vg4) + | AST.PWildcard -> + Ok (envAfterHeads, [], [], vg4) + | _ -> + buildPatternComparison tailPattern (ANF.Var finalTailVar) vg4 + |> Result.map (fun cmpOpt -> + match cmpOpt with + | None -> (envAfterHeads, [], [], vg4) + | Some (condAtom, cmpBindings, vg5) -> + (envAfterHeads, cmpBindings, [condAtom], vg5)) + + tailResult + |> Result.bind (fun (finalEnv, tailBindings, tailCondAtoms, vg5) -> + let allCondAtoms = headCondAtoms @ tailCondAtoms + toANF body vg5 finalEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (bodyExpr, vg6) -> + // Build pattern condition checks first; these checks may depend on + // vars extracted by headBindings/tailBindings, so extraction wraps outside. + let (guardedBody, vg7) = + match allCondAtoms with + | [] -> + (bodyExpr, vg6) + | checks -> + let rec buildCombinedChecks + (remaining: ANF.Atom list) + (accBindings: (ANF.TempId * ANF.CExpr) list) + (prevCond: ANF.Atom option) + (vg: ANF.VarGen) + : ANF.Atom * (ANF.TempId * ANF.CExpr) list * ANF.VarGen = + match remaining with + | [] -> + match prevCond with + | Some cond -> (cond, accBindings, vg) + | None -> (ANF.BoolLiteral true, accBindings, vg) + | condAtom :: rest -> + match prevCond with + | None -> + buildCombinedChecks rest accBindings (Some condAtom) vg + | Some prevCondAtom -> + let (combinedVar, vg1) = ANF.freshVar vg + let combinedExpr = ANF.Prim (ANF.And, prevCondAtom, condAtom) + buildCombinedChecks rest (accBindings @ [(combinedVar, combinedExpr)]) (Some (ANF.Var combinedVar)) vg1 + let (combinedCondAtom, condBindings, vg7') = buildCombinedChecks checks [] None vg6 + let checkedBody = ANF.If (combinedCondAtom, bodyExpr, elseExpr) + (wrapBindings condBindings checkedBody, vg7') + + // Apply tail/head extraction bindings (including comparison inputs) outside guard checks. + let withExtractBindings = wrapBindings (headBindings @ tailBindings) guardedBody + + // Check length condition first + let ifExpr = ANF.If (ANF.Var lengthCheckVar, withExtractBindings, elseExpr) + let withLengthCheck = ANF.Let (lengthCheckVar, lengthCheckExpr, ifExpr) + let finalExpr = ANF.Let (lengthVar, lengthExpr, withLengthCheck) + (finalExpr, vg7))))) + + // Build OR of multiple pattern conditions for pattern grouping + // Returns: combined condition atom, all bindings, updated vargen + let patternStaticallyCannotMatchScrutinee (pattern: AST.Pattern) : bool = + patternStaticallyCannotMatchType pattern scrutType + + let makeFalseCondition (vg: ANF.VarGen) : ANF.Atom * (ANF.TempId * ANF.CExpr) list * ANF.VarGen = + let (cmpVar, vg1) = ANF.freshVar vg + let cmpExpr = ANF.Atom (ANF.BoolLiteral false) + (ANF.Var cmpVar, [(cmpVar, cmpExpr)], vg1) + + let buildPatternGroupComparison (patterns: AST.Pattern list) (scrutAtom: ANF.Atom) (vg: ANF.VarGen) : Result<(ANF.Atom * (ANF.TempId * ANF.CExpr) list * ANF.VarGen) option, string> = + match patterns with + | [] -> Ok None + | [single] -> + if patternStaticallyCannotMatchScrutinee single then + let (condAtom, bindings, vg1) = makeFalseCondition vg + Ok (Some (condAtom, bindings, vg1)) + else + buildPatternComparison single scrutAtom vg + | multiple -> + // Build comparison for each pattern, then OR them together + let rec buildOr (pats: AST.Pattern list) (accCondOpt: ANF.Atom option) (accBindings: (ANF.TempId * ANF.CExpr) list) (vg: ANF.VarGen) : Result<(ANF.Atom * (ANF.TempId * ANF.CExpr) list * ANF.VarGen) option, string> = + match pats with + | [] -> + match accCondOpt with + | None -> Ok None + | Some cond -> Ok (Some (cond, accBindings, vg)) + | pat :: rest -> + let cmpResult = + if patternStaticallyCannotMatchScrutinee pat then + let (condAtom, bindings, vg1) = makeFalseCondition vg + Ok (Some (condAtom, bindings, vg1)) + else + buildPatternComparison pat scrutAtom vg + cmpResult + |> Result.bind (fun cmpOpt -> + match cmpOpt with + | None -> + // Pattern always matches (wildcard/var) - the whole group always matches + Ok None + | Some (condAtom, bindings, vg1) -> + let (newCondOpt, newBindings, vg2) = + match accCondOpt with + | None -> + // First condition + (Some condAtom, bindings @ accBindings, vg1) + | Some accCond -> + // OR with previous conditions + // Put bindings in dependency order: comparison bindings first, OR at end + // (foldBack makes first binding outermost, so dependencies must come first) + let (orVar, vg') = ANF.freshVar vg1 + let orExpr = ANF.Prim (ANF.Or, accCond, condAtom) + (Some (ANF.Var orVar), accBindings @ bindings @ [(orVar, orExpr)], vg') + buildOr rest newCondOpt newBindings vg2) + buildOr multiple None [] vg + + let escapeForRuntimeError (text: string) : string = + text + |> String.collect (fun ch -> + match ch with + | '\\' -> "\\\\" + | '"' -> "\\\"" + | '\n' -> "\\n" + | '\r' -> "\\r" + | '\t' -> "\\t" + | _ -> string ch) + + let rec formatMatchValueForError (expr: AST.Expr) : string option = + match expr with + | AST.Int64Literal n -> Some $"{n}" + | AST.Int128Literal n -> Some (int128ToCanonicalString n) + | AST.Int8Literal n -> Some $"{n}" + | AST.Int16Literal n -> Some $"{n}" + | AST.Int32Literal n -> Some $"{n}" + | AST.UInt8Literal n -> Some $"{n}" + | AST.UInt16Literal n -> Some $"{n}" + | AST.UInt32Literal n -> Some $"{n}" + | AST.UInt64Literal n -> Some $"{n}" + | AST.UInt128Literal n -> Some (uint128ToCanonicalString n) + | AST.BoolLiteral b -> Some (if b then "true" else "false") + | AST.FloatLiteral f -> Some $"{f}" + | AST.UnitLiteral -> Some "()" + | AST.StringLiteral s -> Some $"\"{escapeForRuntimeError s}\"" + | AST.CharLiteral c -> Some $"'{escapeForRuntimeError c}'" + | AST.Constructor (typeName, variantName, payload) -> + let fullName = + if typeName = "" then + variantName + else + $"{typeName}.{variantName}" + match payload with + | None -> Some fullName + | Some payloadExpr -> + formatMatchValueForError payloadExpr + |> Option.map (fun payloadText -> $"{fullName}({payloadText})") + | _ -> None + + let makeNoMatchingCaseFallback (vg: ANF.VarGen) : ANF.AExpr * ANF.VarGen = + let valueText = + formatMatchValueForError scrutinee + |> Option.defaultValue "" + let message = $"Non-exhaustive match: No matching case found for value {valueText} in match expression" + let (errorVar, vg1) = ANF.freshVar vg + let errorExpr = ANF.RuntimeError message + (ANF.Let (errorVar, errorExpr, ANF.Return (ANF.Var errorVar)), vg1) + + // Build the if-else chain from cases + let rec buildChain (remaining: AST.MatchCase list) (vg: ANF.VarGen) : Result = + match remaining with + | [] -> + // No cases left - shouldn't happen if we have wildcard/var + Error "Non-exhaustive pattern match" + | mc :: rest when not (List.isEmpty mc.Patterns.Tail) -> + // Desugar grouped patterns (`p1 | p2 -> body`) into sequential single-pattern + // cases so bindings come from the pattern that actually matched. + let expandedCases = + AST.NonEmptyList.toList mc.Patterns + |> List.filter (fun pattern -> not (patternStaticallyCannotMatchScrutinee pattern)) + |> List.map (fun pattern -> + { mc with Patterns = AST.NonEmptyList.singleton pattern }) + if List.isEmpty expandedCases then + buildChain rest vg + else + buildChain (expandedCases @ rest) vg + | [mc] -> + let pattern = AST.NonEmptyList.head mc.Patterns + let body = mc.Body + let (fallbackExpr, vg1) = makeNoMatchingCaseFallback vg + let compileBodyWithGuard (vgBody: ANF.VarGen) : Result = + match mc.Guard, pattern with + | None, AST.PList (_ :: _ as listPatterns) -> + compileListPatternWithChecks listPatterns scrutineeAtom' scrutType env body fallbackExpr vgBody + | None, AST.PListCons (headPatterns, tailPattern) -> + compileListConsPatternWithChecks headPatterns tailPattern scrutineeAtom' scrutType env body fallbackExpr vgBody + | None, _ -> + extractAndCompileBody pattern body scrutineeAtom' scrutType env vgBody + | Some guardExpr, _ -> + extractAndCompileBodyWithGuard pattern guardExpr body scrutineeAtom' scrutType env vgBody fallbackExpr + + // The specialized list/list-cons compilers already emit complete + // matching checks plus fallback, so a separate pre-comparison + // condition here would duplicate work and code size. + let canSkipPreComparison = + match mc.Guard, pattern with + | None, AST.PList (_ :: _) + | None, AST.PListCons _ -> true + | _ -> false + + if canSkipPreComparison then + compileBodyWithGuard vg1 + else + buildPatternGroupComparison (AST.NonEmptyList.toList mc.Patterns) scrutineeAtom' vg1 + |> Result.bind (fun cmpOpt -> + match cmpOpt with + | None -> + // Pattern always matches; guard (if any) decides between body/fallback. + compileBodyWithGuard vg1 + | Some (condAtom, bindings, vg2) -> + compileBodyWithGuard vg2 + |> Result.map (fun (thenExpr, vg3) -> + let ifExpr = ANF.If (condAtom, thenExpr, fallbackExpr) + let finalExpr = wrapBindings bindings ifExpr + (finalExpr, vg3))) + | mc :: rest -> + // For pattern grouping, use first pattern for bindings but OR all patterns for comparison + let firstPattern = AST.NonEmptyList.head mc.Patterns + let body = mc.Body + if patternAlwaysMatches firstPattern then + // Wildcard or var - matches everything, but may still need guard + match mc.Guard with + | None -> + extractAndCompileBody firstPattern body scrutineeAtom' scrutType env vg + | Some guardExpr -> + // Wildcard with guard - still need to check guard, fall through if false + buildChain rest vg + |> Result.bind (fun (elseExpr, vg1) -> + extractAndCompileBodyWithGuard firstPattern guardExpr body scrutineeAtom' scrutType env vg1 elseExpr) + else + // Non-empty list patterns need special handling with interleaved checks + match firstPattern with + | AST.PList (_ :: _ as listPatterns) -> + // Build the else branch first (rest of cases) + buildChain rest vg + |> Result.bind (fun (elseExpr, vg1) -> + // Use the new interleaved check-and-extract function + compileListPatternWithChecks listPatterns scrutineeAtom' scrutType env body elseExpr vg1) + | AST.PListCons (headPatterns, tailPattern) -> + // List cons pattern - needs interleaved checks + buildChain rest vg + |> Result.bind (fun (elseExpr, vg1) -> + compileListConsPatternWithChecks headPatterns tailPattern scrutineeAtom' scrutType env body elseExpr vg1) + | _ -> + // Use pattern grouping: OR all patterns in the group + buildPatternGroupComparison (AST.NonEmptyList.toList mc.Patterns) scrutineeAtom' vg + |> Result.bind (fun cmpOpt -> + match cmpOpt with + | None -> + // Pattern always matches + match mc.Guard with + | None -> + extractAndCompileBody firstPattern body scrutineeAtom' scrutType env vg + | Some guardExpr -> + buildChain rest vg + |> Result.bind (fun (elseExpr, vg1) -> + extractAndCompileBodyWithGuard firstPattern guardExpr body scrutineeAtom' scrutType env vg1 elseExpr) + | Some (condAtom, bindings, vg1) -> + match mc.Guard with + | None -> + extractAndCompileBody firstPattern body scrutineeAtom' scrutType env vg1 + |> Result.bind (fun (thenExpr, vg2) -> + buildChain rest vg2 + |> Result.map (fun (elseExpr, vg3) -> + let ifExpr = ANF.If (condAtom, thenExpr, elseExpr) + let finalExpr = wrapBindings bindings ifExpr + (finalExpr, vg3))) + | Some guardExpr -> + // Pattern match + guard: if pattern matches, bind, check guard + buildChain rest vg1 + |> Result.bind (fun (elseExpr, vg2) -> + extractAndCompileBodyWithGuard firstPattern guardExpr body scrutineeAtom' scrutType env vg2 elseExpr + |> Result.map (fun (guardedBody, vg3) -> + let ifExpr = ANF.If (condAtom, guardedBody, elseExpr) + let finalExpr = wrapBindings bindings ifExpr + (finalExpr, vg3)))) + + buildChain cases varGen1' + |> Result.map (fun (chainExpr, varGen2) -> + let chainWithPostBindings = wrapBindings scrutineePostBindings chainExpr + let exprWithScrutinee = bindReturns scrutineeExpr (fun _ -> chainWithPostBindings) + (exprWithScrutinee, varGen2))) + + | AST.InterpolatedString parts -> + // Desugar interpolated string to StringConcat chain + // $"Hello {name}!" → "Hello " ++ name ++ "!" + let partToExpr (part: AST.StringPart) : AST.Expr = + match part with + | AST.StringText s -> AST.StringLiteral s + | AST.StringExpr e -> e + match parts with + | [] -> + // Empty interpolated string → empty string + Ok (ANF.Return (ANF.StringLiteral ""), varGen) + | [single] -> + // Single part → convert directly + toANF (partToExpr single) varGen env typeReg variantLookup funcReg moduleRegistry + | first :: rest -> + // Multiple parts → fold with StringConcat + let desugared = + rest + |> List.fold (fun acc part -> + AST.BinOp (AST.StringConcat, acc, partToExpr part)) + (partToExpr first) + toANF desugared varGen env typeReg variantLookup funcReg moduleRegistry + + | AST.Lambda (_parameters, _body) -> + // Lambda in expression position - closures not yet fully implemented + Error "Lambda expressions (closures) are not yet fully implemented" + + | AST.Apply (func, args) -> + // Apply a function expression to arguments + // For now, only support immediate application of lambdas + let argsList = exprArgsToList args + match func with + | AST.Lambda (parameters, body) -> + // Immediate application: ((x: int) => x + 1)(5) becomes let x = 5 in x + 1 + let parameterList = paramsToList parameters + if List.length argsList <> List.length parameterList then + Error $"Lambda expects {List.length parameterList} arguments, got {List.length argsList}" + else + // Build nested let bindings: let p1 = arg1 in let p2 = arg2 in ... body + let rec buildLets (ps: (string * AST.Type) list) (as': AST.Expr list) : AST.Expr = + match ps, as' with + | [], [] -> body + | (pName, _) :: restPs, argExpr :: restAs -> + AST.Let (pName, argExpr, buildLets restPs restAs) + | _ -> body // Should not happen due to length check + let desugared = buildLets parameterList argsList + toANF desugared varGen env typeReg variantLookup funcReg moduleRegistry + | AST.Var name -> + // Calling a variable that might hold a closure + match Map.tryFind name env with + | Some (tempId, _) -> + // Variable exists - treat as closure call + let rec convertArgs (remaining: AST.Expr list) (vg: ANF.VarGen) (acc: (ANF.Atom * (ANF.TempId * ANF.CExpr) list) list) = + match remaining with + | [] -> Ok (List.rev acc, vg) + | arg :: rest -> + toAtom arg vg env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (argAtom, argBindings, vg') -> + convertArgs rest vg' ((argAtom, argBindings) :: acc)) + convertArgs argsList varGen [] + |> Result.bind (fun (argResults, varGen1) -> + let argAtoms = argResults |> List.map fst + let allBindings = argResults |> List.collect snd + // Generate closure call + let (resultId, varGen2) = ANF.freshVar varGen1 + let closureCall = ANF.ClosureCall (ANF.Var tempId, argAtoms) + let finalBindings = allBindings @ [(resultId, closureCall)] + Ok (ANF.Return (ANF.Var resultId), varGen2) + |> Result.map (fun (expr, vg) -> + (wrapBindings finalBindings expr, vg))) + | None -> + Error $"Cannot apply variable '{name}' as function - variable not in scope" + + | AST.Apply (_, _) -> + // Nested application: ((x) => (y) => ...)(a)(b)(c)... + // Flatten all nested applies first, then desugar from innermost out + let rec flattenApplies expr argLists = + match expr with + | AST.Apply (innerFunc, innerArgs) -> + flattenApplies innerFunc (exprArgsToList innerArgs :: argLists) + | other -> (other, argLists) + + let (baseFunc, allArgLists) = flattenApplies func [argsList] + // allArgLists is a list of arg lists, from innermost to outermost + // e.g., for f(1)(2)(3), we get ([1], [2], [3]) + + match baseFunc with + | AST.Lambda _ -> + // Desugar all nested lambda applications at once + let rec desugaAll (currentFunc: AST.Expr) (remainingArgLists: AST.Expr list list) : AST.Expr = + match remainingArgLists with + | [] -> currentFunc + | currentArgs :: restArgLists -> + match currentFunc with + | AST.Lambda (lambdaParams, body) -> + let lambdaParamList = paramsToList lambdaParams + if List.length currentArgs <> List.length lambdaParamList then + // Will error later, just wrap in Apply for now + desugaAll (AST.Apply (currentFunc, exprArgsFromList currentArgs)) restArgLists + else + // Desugar: let p1 = a1 in let p2 = a2 in ... body + let rec buildLets (ps: (string * AST.Type) list) (as': AST.Expr list) : AST.Expr = + match ps, as' with + | [], [] -> body + | (pName, _) :: restPs, argExpr :: restAs -> + AST.Let (pName, argExpr, buildLets restPs restAs) + | _ -> body + let desugared = buildLets lambdaParamList currentArgs + desugaAll desugared restArgLists + | AST.Let (name, value, innerBody) -> + // Float let out: Apply(let x = v in body, args) → let x = v in Apply(body, args) + AST.Let (name, value, desugaAll innerBody (currentArgs :: restArgLists)) + | _ -> + // Non-lambda function - wrap remaining in Apply + let applied = AST.Apply (currentFunc, exprArgsFromList currentArgs) + desugaAll applied restArgLists + + let desugared = desugaAll baseFunc allArgLists + toANF desugared varGen env typeReg variantLookup funcReg moduleRegistry + + | _ -> + // Base function is not a lambda - use toAtom which handles nested applies + // Reconstruct the full nested apply, then delegate to toAtom + let rec applyAll (currentExpr: AST.Expr) (remainingArgLists: AST.Expr list list) : AST.Expr = + match remainingArgLists with + | [] -> currentExpr + | currentArgs :: rest -> + applyAll (AST.Apply (currentExpr, exprArgsFromList currentArgs)) rest + let fullApply = applyAll baseFunc allArgLists + + toAtom fullApply varGen env typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (resultAtom, bindings, vg) -> + (wrapBindings bindings (ANF.Return resultAtom), vg)) + + | AST.Let (letName, letValue, letBody) -> + // Apply(let x = v in body, args) → let x = v in Apply(body, args) + // Float the let binding out + toANF (AST.Let (letName, letValue, AST.Apply (letBody, args))) varGen env typeReg variantLookup funcReg moduleRegistry + + | AST.Closure (funcName, captures) -> + // Closure being called directly - convert to ClosureCall + // First, convert captures to atoms + let rec convertCaptures (caps: AST.Expr list) (vg: ANF.VarGen) (acc: (ANF.Atom * (ANF.TempId * ANF.CExpr) list) list) = + match caps with + | [] -> Ok (List.rev acc, vg) + | cap :: rest -> + toAtom cap vg env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (capAtom, capBindings, vg') -> + convertCaptures rest vg' ((capAtom, capBindings) :: acc)) + convertCaptures captures varGen [] + |> Result.bind (fun (captureResults, varGen1) -> + let captureAtoms = captureResults |> List.map fst + let captureBindings = captureResults |> List.collect snd + // Allocate closure + let (closureId, varGen2) = ANF.freshVar varGen1 + let closureAlloc = ANF.ClosureAlloc (funcName, captureAtoms) + // Convert args + let rec convertArgs (remaining: AST.Expr list) (vg: ANF.VarGen) (acc: (ANF.Atom * (ANF.TempId * ANF.CExpr) list) list) = + match remaining with + | [] -> Ok (List.rev acc, vg) + | arg :: rest -> + toAtom arg vg env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (argAtom, argBindings, vg') -> + convertArgs rest vg' ((argAtom, argBindings) :: acc)) + convertArgs argsList varGen2 [] + |> Result.bind (fun (argResults, varGen3) -> + let argAtoms = argResults |> List.map fst + let argBindings = argResults |> List.collect snd + // Generate closure call + let (resultId, varGen4) = ANF.freshVar varGen3 + let closureCall = ANF.ClosureCall (ANF.Var closureId, argAtoms) + let allBindings = captureBindings @ [(closureId, closureAlloc)] @ argBindings @ [(resultId, closureCall)] + Ok (wrapBindings allBindings (ANF.Return (ANF.Var resultId)), varGen4))) + + | _ -> + // General function-expression application (for example record field access): + // evaluate function expression to a closure value, then invoke it. + toAtom func varGen env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (funcAtom, funcBindings, varGen1) -> + let rec convertArgs + (remaining: AST.Expr list) + (vg: ANF.VarGen) + (acc: (ANF.Atom * (ANF.TempId * ANF.CExpr) list) list) + = + match remaining with + | [] -> Ok (List.rev acc, vg) + | arg :: rest -> + toAtom arg vg env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (argAtom, argBindings, vg') -> + convertArgs rest vg' ((argAtom, argBindings) :: acc)) + + convertArgs argsList varGen1 [] + |> Result.map (fun (argResults, varGen2) -> + let argAtoms = argResults |> List.map fst + let argBindings = argResults |> List.collect snd + let (resultId, varGen3) = ANF.freshVar varGen2 + let closureCall = ANF.ClosureCall (funcAtom, argAtoms) + let allBindings = funcBindings @ argBindings @ [(resultId, closureCall)] + (wrapBindings allBindings (ANF.Return (ANF.Var resultId)), varGen3))) + +/// Convert an AST expression to an atom, introducing let bindings as needed +and toAtom (expr: AST.Expr) (varGen: ANF.VarGen) (env: VarEnv) (typeReg: TypeRegistry) (variantLookup: VariantLookup) (funcReg: FunctionRegistry) (moduleRegistry: AST.ModuleRegistry) : Result = + match expr with + | AST.UnitLiteral -> + Ok (ANF.UnitLiteral, [], varGen) + + | AST.Int64Literal n -> + Ok (ANF.IntLiteral (ANF.Int64 n), [], varGen) + + | AST.Int128Literal n -> + Ok (ANF.StringLiteral (int128ToCanonicalString n), [], varGen) + + | AST.Int8Literal n -> + Ok (ANF.IntLiteral (ANF.Int8 n), [], varGen) + + | AST.Int16Literal n -> + Ok (ANF.IntLiteral (ANF.Int16 n), [], varGen) + + | AST.Int32Literal n -> + Ok (ANF.IntLiteral (ANF.Int32 n), [], varGen) + + | AST.UInt8Literal n -> + Ok (ANF.IntLiteral (ANF.UInt8 n), [], varGen) + + | AST.UInt16Literal n -> + Ok (ANF.IntLiteral (ANF.UInt16 n), [], varGen) + + | AST.UInt32Literal n -> + Ok (ANF.IntLiteral (ANF.UInt32 n), [], varGen) + + | AST.UInt64Literal n -> + Ok (ANF.IntLiteral (ANF.UInt64 n), [], varGen) + + | AST.UInt128Literal n -> + Ok (ANF.StringLiteral (uint128ToCanonicalString n), [], varGen) + + | AST.BoolLiteral b -> + Ok (ANF.BoolLiteral b, [], varGen) + + | AST.StringLiteral s -> + Ok (ANF.StringLiteral s, [], varGen) + + | AST.CharLiteral s -> + // Char literal uses same representation as string + Ok (ANF.StringLiteral s, [], varGen) + + | AST.FloatLiteral f -> + Ok (ANF.FloatLiteral f, [], varGen) + + | AST.Var name -> + if isBuiltinTestNanName name then + Ok (ANF.FloatLiteral System.Double.NaN, [], varGen) + else + // Variable reference: look up in environment + match tryLookupWithFallback name env with + | Some ((tempId, _), _) -> Ok (ANF.Var tempId, [], varGen) + | None -> + // Check if it's a module function (e.g., Stdlib.Int64.add) + match Stdlib.tryGetFunctionWithFallback moduleRegistry name with + | Some (moduleFunc, resolvedName) -> + if List.isEmpty moduleFunc.ParamTypes then + // Legacy upstream compatibility: nullary stdlib functions are + // commonly used as values (without `()`), expecting evaluation. + toAtom + (AST.Call (resolvedName, exprArgsFromList [])) + varGen + env + typeReg + variantLookup + funcReg + moduleRegistry + else + // Module function reference - wrap in closure for uniform calling convention + let (closureId, varGen') = ANF.freshVar varGen + let closureAlloc = ANF.ClosureAlloc (resolvedName, []) + Ok (ANF.Var closureId, [(closureId, closureAlloc)], varGen') + | None -> + // Check if it's a function reference (function name used as value) + match tryLookupWithFallback name funcReg with + | Some (funcType, resolvedName) -> + match funcType with + | AST.TFunction (paramTypes, _) when List.isEmpty paramTypes -> + // Legacy upstream compatibility for nullary functions. + toAtom + (AST.Call (resolvedName, exprArgsFromList [])) + varGen + env + typeReg + variantLookup + funcReg + moduleRegistry + | _ -> + // Wrap in closure for uniform calling convention + let (closureId, varGen') = ANF.freshVar varGen + let closureAlloc = ANF.ClosureAlloc (resolvedName, []) + Ok (ANF.Var closureId, [(closureId, closureAlloc)], varGen') + | None -> + Error $"Undefined variable: {name}" + + | AST.FuncRef name -> + // Explicit function reference - wrap in closure for uniform calling convention + let (closureId, varGen') = ANF.freshVar varGen + let closureAlloc = ANF.ClosureAlloc (name, []) + Ok (ANF.Var closureId, [(closureId, closureAlloc)], varGen') + + | AST.Closure (funcName, captures) -> + // Closure in atom position: convert captures and create ClosureAlloc binding + let rec convertCaptures (caps: AST.Expr list) (vg: ANF.VarGen) (acc: (ANF.Atom * (ANF.TempId * ANF.CExpr) list) list) = + match caps with + | [] -> Ok (List.rev acc, vg) + | cap :: rest -> + toAtom cap vg env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (capAtom, capBindings, vg') -> + convertCaptures rest vg' ((capAtom, capBindings) :: acc)) + convertCaptures captures varGen [] + |> Result.map (fun (captureResults, varGen1) -> + let captureAtoms = captureResults |> List.map fst + let allBindings = captureResults |> List.collect snd + // Create binding for ClosureAlloc + let (closureId, varGen2) = ANF.freshVar varGen1 + let closureAlloc = ANF.ClosureAlloc (funcName, captureAtoms) + (ANF.Var closureId, allBindings @ [(closureId, closureAlloc)], varGen2)) + + | AST.Let (name, value, body) -> + // Let binding in atom position: need to evaluate and return the body as an atom + // Infer the type of the value for type-directed field lookup + let typeEnv = typeEnvFromVarEnv env + inferType value typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun valueType -> + toAtom value varGen env typeReg variantLookup funcReg moduleRegistry |> Result.bind (fun (valueAtom, valueBindings, varGen1) -> + let (tempId, varGen2) = ANF.freshVar varGen1 + let env' = Map.add name (tempId, valueType) env + toAtom body varGen2 env' typeReg variantLookup funcReg moduleRegistry |> Result.map (fun (bodyAtom, bodyBindings, varGen3) -> + // All bindings: valueBindings + binding tempId to value + bodyBindings + let allBindings = valueBindings @ [(tempId, ANF.Atom valueAtom)] @ bodyBindings + (bodyAtom, allBindings, varGen3)))) + + | AST.UnaryOp (AST.Neg, innerExpr) -> + // Unary negation: use operand type to select float vs integer path + let typeEnv = typeEnvFromVarEnv env + inferType innerExpr typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun innerType -> + match innerType with + | AST.TFloat64 -> + match innerExpr with + | AST.FloatLiteral f -> + // Constant-fold negative float literals at compile time + Ok (ANF.FloatLiteral (-f), [], varGen) + | _ -> + toAtom innerExpr varGen env typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (innerAtom, innerBindings, varGen1) -> + let (tempVar, varGen2) = ANF.freshVar varGen1 + let cexpr = ANF.FloatNeg innerAtom + let allBindings = innerBindings @ [(tempVar, cexpr)] + (ANF.Var tempVar, allBindings, varGen2)) + | AST.TInt64 -> + match innerExpr with + | AST.Int64Literal n when n = System.Int64.MinValue -> + // The lexer stores INT64_MIN as a sentinel for "9223372036854775808" + // When negated, it should remain INT64_MIN (mathematically correct) + Ok (ANF.IntLiteral (ANF.Int64 System.Int64.MinValue), [], varGen) + | _ -> + let zeroExpr = AST.Int64Literal 0L + toAtom (AST.BinOp (AST.Sub, zeroExpr, innerExpr)) varGen env typeReg variantLookup funcReg moduleRegistry + | AST.TInt32 -> + let zeroExpr = AST.Int32Literal 0l + toAtom (AST.BinOp (AST.Sub, zeroExpr, innerExpr)) varGen env typeReg variantLookup funcReg moduleRegistry + | AST.TInt16 -> + let zeroExpr = AST.Int16Literal 0s + toAtom (AST.BinOp (AST.Sub, zeroExpr, innerExpr)) varGen env typeReg variantLookup funcReg moduleRegistry + | AST.TInt8 -> + let zeroExpr = AST.Int8Literal 0y + toAtom (AST.BinOp (AST.Sub, zeroExpr, innerExpr)) varGen env typeReg variantLookup funcReg moduleRegistry + | AST.TUInt64 -> + let zeroExpr = AST.UInt64Literal 0UL + toAtom (AST.BinOp (AST.Sub, zeroExpr, innerExpr)) varGen env typeReg variantLookup funcReg moduleRegistry + | AST.TUInt32 -> + let zeroExpr = AST.UInt32Literal 0ul + toAtom (AST.BinOp (AST.Sub, zeroExpr, innerExpr)) varGen env typeReg variantLookup funcReg moduleRegistry + | AST.TUInt16 -> + let zeroExpr = AST.UInt16Literal 0us + toAtom (AST.BinOp (AST.Sub, zeroExpr, innerExpr)) varGen env typeReg variantLookup funcReg moduleRegistry + | AST.TUInt8 -> + let zeroExpr = AST.UInt8Literal 0uy + toAtom (AST.BinOp (AST.Sub, zeroExpr, innerExpr)) varGen env typeReg variantLookup funcReg moduleRegistry + | _ -> + Error $"Negation requires numeric operand, got {innerType}") + + | AST.UnaryOp (AST.Not, innerExpr) -> + // Boolean not: convert operand to atom, create binding + toAtom innerExpr varGen env typeReg variantLookup funcReg moduleRegistry |> Result.map (fun (innerAtom, innerBindings, varGen1) -> + // Create the operation + let (tempVar, varGen2) = ANF.freshVar varGen1 + let cexpr = ANF.UnaryPrim (ANF.Not, innerAtom) + + // Return the temp variable as atom, plus all bindings + let allBindings = innerBindings @ [(tempVar, cexpr)] + (ANF.Var tempVar, allBindings, varGen2)) + + | AST.UnaryOp (AST.BitNot, innerExpr) -> + // Bitwise NOT: convert operand to atom, create binding + toAtom innerExpr varGen env typeReg variantLookup funcReg moduleRegistry |> Result.map (fun (innerAtom, innerBindings, varGen1) -> + // Create the operation + let (tempVar, varGen2) = ANF.freshVar varGen1 + let cexpr = ANF.UnaryPrim (ANF.BitNot, innerAtom) + + // Return the temp variable as atom, plus all bindings + let allBindings = innerBindings @ [(tempVar, cexpr)] + (ANF.Var tempVar, allBindings, varGen2)) + + | AST.BinOp (op, left, right) -> + // Complex expression: convert operands to atoms, create binding + toAtom left varGen env typeReg variantLookup funcReg moduleRegistry |> Result.bind (fun (leftAtom, leftBindings, varGen1) -> + toAtom right varGen1 env typeReg variantLookup funcReg moduleRegistry |> Result.bind (fun (rightAtom, rightBindings, varGen2) -> + // Check if this is an equality comparison on compound types + let typeEnv = typeEnvFromVarEnv env + match op with + | AST.Eq | AST.Neq -> + match inferType left typeEnv typeReg variantLookup funcReg moduleRegistry with + | Ok operandType when isCompoundType operandType -> + // Generate structural equality + let (eqBindings, eqResultAtom, varGen3) = + generateStructuralEquality leftAtom rightAtom operandType varGen2 typeReg variantLookup + // For Neq, negate the result + let (finalAtom, finalBindings, varGen4) = + if op = AST.Neq then + let (negVar, vg) = ANF.freshVar varGen3 + let negExpr = ANF.UnaryPrim (ANF.Not, eqResultAtom) + (ANF.Var negVar, eqBindings @ [(negVar, negExpr)], vg) + else + (eqResultAtom, eqBindings, varGen3) + let allBindings = leftBindings @ rightBindings @ finalBindings + Ok (finalAtom, allBindings, varGen4) + | Ok AST.TString + | Ok AST.TChar + | Ok AST.TInt128 + | Ok AST.TUInt128 -> + // String/char/128-bit equality - call __string_eq. + // Int128/UInt128 values are lowered as canonical decimal strings. + let (tempVar, varGen3) = ANF.freshVar varGen2 + let cexpr = ANF.Call ("__string_eq", [leftAtom; rightAtom]) + // For Neq, negate the result + let (finalAtom, finalBindings, varGen4) = + if op = AST.Neq then + let (negVar, vg) = ANF.freshVar varGen3 + let negExpr = ANF.UnaryPrim (ANF.Not, ANF.Var tempVar) + (ANF.Var negVar, [(tempVar, cexpr); (negVar, negExpr)], vg) + else + (ANF.Var tempVar, [(tempVar, cexpr)], varGen3) + let allBindings = leftBindings @ rightBindings @ finalBindings + Ok (finalAtom, allBindings, varGen4) + | _ -> + // Primitive type - simple comparison + let (tempVar, varGen3) = ANF.freshVar varGen2 + let cexpr = ANF.Prim (convertBinOp op, leftAtom, rightAtom) + let allBindings = leftBindings @ rightBindings @ [(tempVar, cexpr)] + Ok (ANF.Var tempVar, allBindings, varGen3) + | AST.StringConcat -> + let (tempVar, varGen3) = ANF.freshVar varGen2 + let cexpr = ANF.StringConcat (leftAtom, rightAtom) + let allBindings = leftBindings @ rightBindings @ [(tempVar, cexpr)] + Ok (ANF.Var tempVar, allBindings, varGen3) + // Arithmetic, bitwise, and comparison operators - use simple primitive + | AST.Add | AST.Sub | AST.Mul | AST.Div | AST.Mod + | AST.Shl | AST.Shr | AST.BitAnd | AST.BitOr | AST.BitXor + | AST.Lt | AST.Gt | AST.Lte | AST.Gte + | AST.And | AST.Or -> + let (tempVar, varGen3) = ANF.freshVar varGen2 + let cexpr = ANF.Prim (convertBinOp op, leftAtom, rightAtom) + let allBindings = leftBindings @ rightBindings @ [(tempVar, cexpr)] + Ok (ANF.Var tempVar, allBindings, varGen3))) + + | AST.If (condExpr, thenExpr, elseExpr) -> + // If expression in atom position: use IfValue only when branch bindings are + // safe to evaluate eagerly. Otherwise, force callers to use full toANF + // lowering so non-selected branches remain lazy. + let isEagerIfBindingSafe (_: ANF.TempId, cexpr: ANF.CExpr) : bool = + match cexpr with + | ANF.Atom _ + | ANF.TypedAtom _ + | ANF.Prim _ + | ANF.UnaryPrim _ + | ANF.IfValue _ + | ANF.TupleGet _ + | ANF.RawGet _ + | ANF.RawGetByte _ + | ANF.FloatSqrt _ + | ANF.FloatAbs _ + | ANF.FloatNeg _ + | ANF.Int64ToFloat _ + | ANF.FloatToInt64 _ + | ANF.FloatToBits _ -> true + | _ -> false + + toAtom condExpr varGen env typeReg variantLookup funcReg moduleRegistry |> Result.bind (fun (condAtom, condBindings, varGen1) -> + toAtom thenExpr varGen1 env typeReg variantLookup funcReg moduleRegistry |> Result.bind (fun (thenAtom, thenBindings, varGen2) -> + toAtom elseExpr varGen2 env typeReg variantLookup funcReg moduleRegistry |> Result.bind (fun (elseAtom, elseBindings, varGen3) -> + let thenBindingsSafe = List.forall isEagerIfBindingSafe thenBindings + let elseBindingsSafe = List.forall isEagerIfBindingSafe elseBindings + + if thenBindingsSafe && elseBindingsSafe then + // Create a temporary for the result + let (tempVar, varGen4) = ANF.freshVar varGen3 + // Create an IfValue CExpr + let ifCExpr = ANF.IfValue (condAtom, thenAtom, elseAtom) + // Return temp as atom with all bindings + let allBindings = condBindings @ thenBindings @ elseBindings @ [(tempVar, ifCExpr)] + Ok (ANF.Var tempVar, allBindings, varGen4) + else + Error "If expression requires lazy branch lowering"))) + + | AST.Call (funcName, args) -> + if isBuiltinUnwrapName funcName then + Error "Internal error: Builtin.unwrap should be lowered via toANF, not toAtom" + elif isBuiltinTestRuntimeErrorName funcName then + Error "Internal error: Builtin.testRuntimeError should be lowered via toANF, not toAtom" + else + // Function call in atom position: convert all arguments to atoms + let argExprList = exprArgsToList args + + let rec convertArgs (argExprs: AST.Expr list) (vg: ANF.VarGen) (accAtoms: ANF.Atom list) (accBindings: (ANF.TempId * ANF.CExpr) list) : Result = + match argExprs with + | [] -> Ok (List.rev accAtoms, accBindings, vg) + | arg :: rest -> + toAtom arg vg env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (argAtom, argBindings, vg') -> + convertArgs rest vg' (argAtom :: accAtoms) (accBindings @ argBindings)) + + convertArgs argExprList varGen [] [] + |> Result.bind (fun (argAtoms, argBindings, varGen1) -> + // Create a temporary for the call result + let (tempVar, varGen2) = ANF.freshVar varGen1 + // Check if funcName is a variable (indirect call) or a defined function (direct call) + match Map.tryFind funcName env with + | Some (tempId, AST.TFunction (paramTypes, _)) -> + // Variable with function type - use closure call + // All function values are now closures (even non-capturing ones) + let normalizedArgAtoms = normalizeSyntheticNullaryArgAtoms paramTypes argExprList argAtoms + let callCExpr = ANF.ClosureCall (ANF.Var tempId, normalizedArgAtoms) + let allBindings = argBindings @ [(tempVar, callCExpr)] + Ok (ANF.Var tempVar, allBindings, varGen2) + | Some (tempId, AST.TVar _) -> + // Keep unresolved higher-order generic values callable in atom position. + let callCExpr = ANF.ClosureCall (ANF.Var tempId, argAtoms) + let allBindings = argBindings @ [(tempVar, callCExpr)] + Ok (ANF.Var tempVar, allBindings, varGen2) + | Some (_, varType) -> + // Variable exists but is not a function type + Error $"Cannot call '{funcName}' - it has type {varType}, not a function type" + | None -> + // Not a variable - check if it's a file intrinsic first + match tryFileIntrinsic funcName argAtoms with + | Some intrinsicExpr -> + // File I/O intrinsic call + let allBindings = argBindings @ [(tempVar, intrinsicExpr)] + Ok (ANF.Var tempVar, allBindings, varGen2) + | None -> + // Check if it's a raw memory intrinsic + match tryRawMemoryIntrinsic variantLookup funcName argAtoms with + | Some intrinsicExpr -> + // Raw memory intrinsic call + let allBindings = argBindings @ [(tempVar, intrinsicExpr)] + Ok (ANF.Var tempVar, allBindings, varGen2) + | None -> + // Check if it's a Float intrinsic + match tryFloatIntrinsic funcName argAtoms with + | Some intrinsicExpr -> + // Float intrinsic call + let allBindings = argBindings @ [(tempVar, intrinsicExpr)] + Ok (ANF.Var tempVar, allBindings, varGen2) + | None -> + // Check if it's a constant-fold intrinsic (Platform, Path) + match tryConstantFoldIntrinsic funcName argAtoms with + | Some intrinsicExpr -> + // Constant-folded intrinsic + let allBindings = argBindings @ [(tempVar, intrinsicExpr)] + Ok (ANF.Var tempVar, allBindings, varGen2) + | None -> + // Check if it's a random intrinsic + match tryRandomIntrinsic funcName argAtoms with + | Some intrinsicExpr -> + // Random intrinsic call + let allBindings = argBindings @ [(tempVar, intrinsicExpr)] + Ok (ANF.Var tempVar, allBindings, varGen2) + | None -> + // Check if it's a date intrinsic + match tryDateIntrinsic funcName argAtoms with + | Some intrinsicExpr -> + // Date intrinsic call + let allBindings = argBindings @ [(tempVar, intrinsicExpr)] + Ok (ANF.Var tempVar, allBindings, varGen2) + | None -> + // Assume it's a defined function (direct call) + let callArgAtoms = + match Map.tryFind funcName funcReg with + | Some (AST.TFunction (paramTypes, _)) -> + normalizeSyntheticNullaryArgAtoms paramTypes argExprList argAtoms + | _ -> + argAtoms + let callCExpr = ANF.Call (funcName, callArgAtoms) + let allBindings = argBindings @ [(tempVar, callCExpr)] + Ok (ANF.Var tempVar, allBindings, varGen2)) + + | AST.TypeApp (_, _, _) -> + // Placeholder: Generic instantiation not yet implemented + Error "TypeApp (generic instantiation) not yet implemented in toAtom" + + | AST.TupleLiteral elements -> + // Convert all elements to atoms + let rec convertElements (elems: AST.Expr list) (vg: ANF.VarGen) (accAtoms: ANF.Atom list) (accBindings: (ANF.TempId * ANF.CExpr) list) : Result = + match elems with + | [] -> Ok (List.rev accAtoms, accBindings, vg) + | elem :: rest -> + toAtom elem vg env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (elemAtom, elemBindings, vg') -> + convertElements rest vg' (elemAtom :: accAtoms) (accBindings @ elemBindings)) + + convertElements elements varGen [] [] + |> Result.map (fun (elemAtoms, elemBindings, varGen1) -> + // Create a temporary for the tuple + let (tempVar, varGen2) = ANF.freshVar varGen1 + let tupleCExpr = ANF.TupleAlloc elemAtoms + // Return temp as atom with all bindings + let allBindings = elemBindings @ [(tempVar, tupleCExpr)] + (ANF.Var tempVar, allBindings, varGen2)) + + | AST.TupleAccess (tupleExpr, index) -> + // Convert tuple to atom and create TupleGet + toAtom tupleExpr varGen env typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (tupleAtom, tupleBindings, varGen1) -> + let (tempVar, varGen2) = ANF.freshVar varGen1 + let getCExpr = ANF.TupleGet (tupleAtom, index) + // Return temp as atom with all bindings + let allBindings = tupleBindings @ [(tempVar, getCExpr)] + (ANF.Var tempVar, allBindings, varGen2)) + + | AST.RecordLiteral (typeName, fields) -> + // Records are compiled like tuples + let fieldOrder = + if typeName = "" then + fields |> List.map fst + else + match Map.tryFind typeName typeReg with + | Some typeFields -> typeFields |> List.map fst + | None -> fields |> List.map fst + + let fieldMap = Map.ofList fields + let orderedValues = + fieldOrder + |> List.choose (fun fname -> Map.tryFind fname fieldMap) + + // Reuse tuple handling + toAtom (AST.TupleLiteral orderedValues) varGen env typeReg variantLookup funcReg moduleRegistry + + | AST.RecordUpdate (recordExpr, updates) -> + // Desugar to RecordLiteral: build new record with updated fields + let typeEnv = typeEnvFromVarEnv env + inferType recordExpr typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun recordType -> + match recordType with + | AST.TRecord (typeName, _) -> + match Map.tryFind typeName typeReg with + | Some typeFields -> + let updateMap = Map.ofList updates + let newFields = + typeFields + |> List.map (fun (fname, _) -> + match Map.tryFind fname updateMap with + | Some updateExpr -> (fname, updateExpr) + | None -> (fname, AST.RecordAccess (recordExpr, fname))) + toAtom (AST.RecordLiteral (typeName, newFields)) varGen env typeReg variantLookup funcReg moduleRegistry + | None -> Error $"Unknown record type: {typeName}" + | _ -> Error "Cannot use record update syntax on non-record type") + + | AST.RecordAccess (recordExpr, fieldName) -> + // Records are compiled like tuples - field access becomes TupleGet + // Use type-directed lookup: infer the record type, then find field index + let typeEnv = typeEnvFromVarEnv env + inferType recordExpr typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun recordType -> + match recordType with + | AST.TRecord (typeName, _) -> + // Look up field index in the specific record type + match Map.tryFind typeName typeReg with + | Some fields -> + match List.tryFindIndex (fun (name, _) -> name = fieldName) fields with + | Some index -> + toAtom recordExpr varGen env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (recordAtom, recordBindings, varGen1) -> + let (tempVar, varGen2) = ANF.freshVar varGen1 + let getCExpr = ANF.TupleGet (recordAtom, index) + let allBindings = recordBindings @ [(tempVar, getCExpr)] + Ok (ANF.Var tempVar, allBindings, varGen2)) + | None -> + Error $"Record type '{typeName}' has no field '{fieldName}'" + | None -> + Error $"Unknown record type: {typeName}" + | _ -> + Error $"Cannot access field '{fieldName}' on non-record type") + + | AST.Constructor (_, variantName, payload) -> + match Map.tryFind variantName variantLookup with + | None -> + Error $"Unknown constructor: {variantName}" + | Some (typeName, _, tag, _) -> + // Check if ANY variant in this type has a payload + // Note: We get typeName from variantLookup, not from AST (which may be empty) + let typeHasPayloadVariants = + variantLookup + |> Map.exists (fun _ (tName, _, _, pType) -> tName = typeName && pType.IsSome) + + match payload with + | None when not typeHasPayloadVariants -> + // Pure enum type: return tag as an integer (no bindings needed) + Ok (ANF.IntLiteral (ANF.Int64 (int64 tag)), [], varGen) + | None -> + // No payload but type has other variants with payloads + // Heap-allocate as [tag, 0] for uniform 2-element structure + // This enables consistent structural equality comparison + let tagAtom = ANF.IntLiteral (ANF.Int64 (int64 tag)) + let dummyPayload = ANF.IntLiteral (ANF.Int64 0L) + let (tempVar, varGen1) = ANF.freshVar varGen + let tupleCExpr = ANF.TupleAlloc [tagAtom; dummyPayload] + Ok (ANF.Var tempVar, [(tempVar, tupleCExpr)], varGen1) + | Some payloadExpr -> + // Variant with payload: allocate [tag, payload] on heap + toAtom payloadExpr varGen env typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (payloadAtom, payloadBindings, varGen1) -> + let tagAtom = ANF.IntLiteral (ANF.Int64 (int64 tag)) + // Create TupleAlloc [tag, payload] and bind to fresh variable + let (tempVar, varGen2) = ANF.freshVar varGen1 + let tupleCExpr = ANF.TupleAlloc [tagAtom; payloadAtom] + let allBindings = payloadBindings @ [(tempVar, tupleCExpr)] + (ANF.Var tempVar, allBindings, varGen2)) + + | AST.ListLiteral elements -> + // Compile list literal as FingerTree in atom position + // Tags: EMPTY=0, SINGLE=1, DEEP=2, NODE2=3, NODE3=4, LEAF=5 + // DEEP layout: [measure:8][prefixCount:8][p0:8][p1:8][p2:8][p3:8][middle:8][suffixCount:8][s0:8][s1:8][s2:8][s3:8] + + // Increment refcount for heap elements stored in leaves + let addLeafInc (elemAtom: ANF.Atom) (elemType: AST.Type) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + match elemAtom with + | ANF.Var _ when ANF.isHeapType elemType -> + let size = ANF.payloadSize elemType typeReg + let kind = ANF.rcKind elemType + let (incVar, vg1) = ANF.freshVar vg + let incExpr = ANF.RefCountInc (elemAtom, size, kind) + (vg1, bindings @ [(incVar, incExpr)]) + | _ -> + (vg, bindings) + + let listNode = AST.TList (AST.TVar "a") + let listNodeType = Some listNode + + // Tag a raw pointer as a list value without routing through Stdlib wrappers. + // Keep a typed binding so RC/type inference still treats the result as List. + let tagRawPtrAsList (tag: int64) (ptrVar: ANF.TempId) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + let (taggedRawVar, vg1) = ANF.freshVar vg + let tagExpr = ANF.Prim (ANF.BitOr, ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 tag)) + let (taggedVar, vg2) = ANF.freshVar vg1 + let typedExpr = ANF.TypedAtom (ANF.Var taggedRawVar, listNode) + (ANF.Var taggedVar, bindings @ [(taggedRawVar, tagExpr); (taggedVar, typedExpr)], vg2) + + // Helper to create a LEAF node wrapping an element + let allocLeaf (elemAtom: ANF.Atom) (elemType: AST.Type) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + let (ptrVar, vg1) = ANF.freshVar vg + let (setVar, vg2) = ANF.freshVar vg1 + let (setRcVar, vg3) = ANF.freshVar vg2 + let allocExpr = ANF.RawAlloc (ANF.IntLiteral (ANF.Int64 16L)) + let setExpr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 0L), elemAtom, None) + let setRcExpr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 8L), ANF.IntLiteral (ANF.Int64 1L), None) + let (vg4, bindings4) = + addLeafInc elemAtom elemType vg3 (bindings @ [(ptrVar, allocExpr); (setVar, setExpr); (setRcVar, setRcExpr)]) + tagRawPtrAsList 5L ptrVar vg4 bindings4 + + // Helper to create a SINGLE node containing a TreeNode + let allocSingle (nodeAtom: ANF.Atom) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + let (ptrVar, vg1) = ANF.freshVar vg + let (setVar, vg2) = ANF.freshVar vg1 + let (setRcVar, vg3) = ANF.freshVar vg2 + let allocExpr = ANF.RawAlloc (ANF.IntLiteral (ANF.Int64 16L)) + let setExpr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 0L), nodeAtom, listNodeType) + let setRcExpr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 8L), ANF.IntLiteral (ANF.Int64 1L), None) + let bindings1 = bindings @ [(ptrVar, allocExpr); (setVar, setExpr); (setRcVar, setRcExpr)] + tagRawPtrAsList 1L ptrVar vg3 bindings1 + + // Helper to create a DEEP node + let allocDeep (measure: int) (prefixNodes: ANF.Atom list) (middle: ANF.Atom) (suffixNodes: ANF.Atom list) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + let prefixCount = List.length prefixNodes + let suffixCount = List.length suffixNodes + let (ptrVar, vg1) = ANF.freshVar vg + let allocExpr = ANF.RawAlloc (ANF.IntLiteral (ANF.Int64 104L)) // 12 fields * 8 bytes + refcount + + // Build all the set operations + let setAt offset value valueType vg bindings = + let (setVar, vg') = ANF.freshVar vg + let setExpr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 (int64 offset)), value, valueType) + (vg', bindings @ [(setVar, setExpr)]) + + let (vg2, bindings2) = setAt 0 (ANF.IntLiteral (ANF.Int64 (int64 measure))) None vg1 (bindings @ [(ptrVar, allocExpr)]) + let (vg3, bindings3) = setAt 8 (ANF.IntLiteral (ANF.Int64 (int64 prefixCount))) None vg2 bindings2 + + // Set prefix nodes (p0-p3 at offsets 16, 24, 32, 40) + let rec setPrefix nodes offset vg bindings = + match nodes with + | [] -> (vg, bindings) + | n :: rest -> + let (vg', bindings') = setAt offset n listNodeType vg bindings + setPrefix rest (offset + 8) vg' bindings' + let (vg4, bindings4) = setPrefix prefixNodes 16 vg3 bindings3 + + // Set middle at offset 48 (type-uniform: another FingerTree of nodes) + let (vg5, bindings5) = setAt 48 middle listNodeType vg4 bindings4 + + // Set suffix count at offset 56 + let (vg6, bindings6) = setAt 56 (ANF.IntLiteral (ANF.Int64 (int64 suffixCount))) None vg5 bindings5 + + // Set suffix nodes (s0-s3 at offsets 64, 72, 80, 88) + let (vg7, bindings7) = setPrefix suffixNodes 64 vg6 bindings6 + + // Set refcount at offset 96 + let (vg8, bindings8) = setAt 96 (ANF.IntLiteral (ANF.Int64 1L)) None vg7 bindings7 + + // Tag with DEEP (2) + tagRawPtrAsList 2L ptrVar vg8 bindings8 + + // Build FingerTree nodes for middle spines without using pushBack. + let emptyTree = ANF.IntLiteral (ANF.Int64 0L) + + let nodeAtom (node: ANF.Atom, _measure: int) = node + let nodeMeasure (_node: ANF.Atom, measure: int) = measure + + // Helper to create a NODE2 (tag 3): [child0:8][child1:8][measure:8] + let allocNode2 (left: ANF.Atom * int) (right: ANF.Atom * int) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + let (ptrVar, vg1) = ANF.freshVar vg + let allocExpr = ANF.RawAlloc (ANF.IntLiteral (ANF.Int64 32L)) + let (set0Var, vg2) = ANF.freshVar vg1 + let set0Expr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 0L), nodeAtom left, listNodeType) + let (set1Var, vg3) = ANF.freshVar vg2 + let set1Expr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 8L), nodeAtom right, listNodeType) + let measure = nodeMeasure left + nodeMeasure right + let (set2Var, vg4) = ANF.freshVar vg3 + let set2Expr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 16L), ANF.IntLiteral (ANF.Int64 (int64 measure)), None) + let (setRcVar, vg5) = ANF.freshVar vg4 + let setRcExpr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 24L), ANF.IntLiteral (ANF.Int64 1L), None) + let bindings1 = + bindings + @ [(ptrVar, allocExpr); (set0Var, set0Expr); (set1Var, set1Expr); (set2Var, set2Expr); (setRcVar, setRcExpr)] + let (taggedNode, bindings2, vg6) = tagRawPtrAsList 3L ptrVar vg5 bindings1 + ((taggedNode, measure), bindings2, vg6) + + // Helper to create a NODE3 (tag 4): [child0:8][child1:8][child2:8][measure:8] + let allocNode3 (first: ANF.Atom * int) (second: ANF.Atom * int) (third: ANF.Atom * int) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + let (ptrVar, vg1) = ANF.freshVar vg + let allocExpr = ANF.RawAlloc (ANF.IntLiteral (ANF.Int64 40L)) + let (set0Var, vg2) = ANF.freshVar vg1 + let set0Expr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 0L), nodeAtom first, listNodeType) + let (set1Var, vg3) = ANF.freshVar vg2 + let set1Expr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 8L), nodeAtom second, listNodeType) + let (set2Var, vg4) = ANF.freshVar vg3 + let set2Expr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 16L), nodeAtom third, listNodeType) + let measure = nodeMeasure first + nodeMeasure second + nodeMeasure third + let (set3Var, vg5) = ANF.freshVar vg4 + let set3Expr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 24L), ANF.IntLiteral (ANF.Int64 (int64 measure)), None) + let (setRcVar, vg6) = ANF.freshVar vg5 + let setRcExpr = ANF.RawSet (ANF.Var ptrVar, ANF.IntLiteral (ANF.Int64 32L), ANF.IntLiteral (ANF.Int64 1L), None) + let bindings1 = + bindings + @ [(ptrVar, allocExpr); (set0Var, set0Expr); (set1Var, set1Expr); (set2Var, set2Expr); (set3Var, set3Expr); (setRcVar, setRcExpr)] + let (taggedNode, bindings2, vg7) = tagRawPtrAsList 4L ptrVar vg6 bindings1 + ((taggedNode, measure), bindings2, vg7) + + let splitAt count nodes = + let rec loop remaining acc rest = + match remaining, rest with + | 0, _ -> Ok (List.rev acc, rest) + | _, [] -> Error "List literal: not enough nodes for split" + | n, x :: xs -> loop (n - 1) (x :: acc) xs + loop count [] nodes + + let groupSizes nodeCount = + if nodeCount < 2 then + Error "List literal: middle spine needs at least 2 nodes" + else + match nodeCount % 3 with + | 0 -> Ok (List.replicate (nodeCount / 3) 3) + | 1 -> + if nodeCount < 4 then + Error "List literal: invalid middle spine size" + else + Ok (2 :: 2 :: List.replicate ((nodeCount - 4) / 3) 3) + | _ -> + Ok (2 :: List.replicate ((nodeCount - 2) / 3) 3) + + let rec buildGroupedNodes sizes nodes vg bindings acc = + match sizes with + | [] -> Ok (List.rev acc, bindings, vg) + | size :: rest -> + splitAt size nodes + |> Result.bind (fun (group, remaining) -> + match size, group with + | 2, [a; b] -> + let (nodeInfo, bindings1, vg1) = allocNode2 a b vg bindings + buildGroupedNodes rest remaining vg1 bindings1 (nodeInfo :: acc) + | 3, [a; b; c] -> + let (nodeInfo, bindings1, vg1) = allocNode3 a b c vg bindings + buildGroupedNodes rest remaining vg1 bindings1 (nodeInfo :: acc) + | _ -> + Error $"List literal: unexpected group size {size}") + + let rec buildTree (nodes: (ANF.Atom * int) list) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) = + let nodeCount = List.length nodes + match nodes with + | [] -> Ok (emptyTree, bindings, vg) + | [single] -> + let (resultAtom, resultBindings, vg1) = allocSingle (nodeAtom single) vg bindings + Ok (resultAtom, resultBindings, vg1) + | first :: rest when nodeCount <= 5 -> + let totalMeasure = nodes |> List.sumBy nodeMeasure + let prefixNodes = [nodeAtom first] + let suffixNodes = rest |> List.map nodeAtom + let (resultAtom, resultBindings, vg1) = allocDeep totalMeasure prefixNodes emptyTree suffixNodes vg bindings + Ok (resultAtom, resultBindings, vg1) + | _ -> + splitAt 2 nodes + |> Result.bind (fun (prefixNodes, rest) -> + let restLength = List.length rest + let middleCount = restLength - 2 + splitAt middleCount rest + |> Result.bind (fun (middleNodes, suffixNodes) -> + groupSizes (List.length middleNodes) + |> Result.bind (fun sizes -> + buildGroupedNodes sizes middleNodes vg bindings [] + |> Result.bind (fun (groupedMiddle, bindings1, vg1) -> + buildTree groupedMiddle vg1 bindings1 + |> Result.map (fun (middleTree, bindings2, vg2) -> + let totalMeasure = nodes |> List.sumBy nodeMeasure + let prefixAtoms = prefixNodes |> List.map nodeAtom + let suffixAtoms = suffixNodes |> List.map nodeAtom + let (resultAtom, resultBindings, vg3) = + allocDeep totalMeasure prefixAtoms middleTree suffixAtoms vg2 bindings2 + (resultAtom, resultBindings, vg3)))))) + + if List.isEmpty elements then + // Empty list is EMPTY (represented as 0) + Ok (ANF.IntLiteral (ANF.Int64 0L), [], varGen) + else + let typeEnv = typeEnvFromVarEnv env + + // Convert all elements to atoms first + let rec convertElements (elems: AST.Expr list) (vg: ANF.VarGen) (acc: (ANF.Atom * AST.Type * (ANF.TempId * ANF.CExpr) list) list) = + match elems with + | [] -> Ok (List.rev acc, vg) + | e :: rest -> + inferType e typeEnv typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun elemType -> + toAtom e vg env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (atom, bindings, vg') -> + convertElements rest vg' ((atom, elemType, bindings) :: acc))) + + convertElements elements varGen [] + |> Result.bind (fun (atomsWithBindings, varGen1) -> + // Flatten all element bindings + let elemBindings = atomsWithBindings |> List.collect (fun (_, _, bindings) -> bindings) + let elemAtoms = atomsWithBindings |> List.map (fun (atom, elemType, _) -> (atom, elemType)) + + // Create LEAF nodes for all elements + let rec createLeaves (atoms: (ANF.Atom * AST.Type) list) (vg: ANF.VarGen) (bindings: (ANF.TempId * ANF.CExpr) list) (acc: ANF.Atom list) = + match atoms with + | [] -> (List.rev acc, bindings, vg) + | (a, elemType) :: rest -> + let (leafAtom, bindings', vg') = allocLeaf a elemType vg bindings + createLeaves rest vg' bindings' (leafAtom :: acc) + + let (leafAtoms, leafBindings, varGen2) = createLeaves elemAtoms varGen1 elemBindings [] + let leafNodes = leafAtoms |> List.map (fun atom -> (atom, 1)) + + buildTree leafNodes varGen2 leafBindings) + + | AST.ListCons (headElements, tail) -> + // Compile list cons in atom position: [a, b, ...tail] prepends elements to tail + // Use Stdlib.__FingerTree.push to prepend each element + toAtom tail varGen env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (tailAtom, tailBindings, varGen1) -> + // Build list by prepending elements from right to left + // [a, b, ...tail] means push(push(tail, b), a) + let rec buildList (elems: AST.Expr list) (vg: ANF.VarGen) (currentList: ANF.Atom) (allBindings: (ANF.TempId * ANF.CExpr) list) : Result = + match elems with + | [] -> Ok (currentList, allBindings, vg) + | elem :: rest -> + // First build the rest of the list, then prepend this element + buildList rest vg currentList allBindings + |> Result.bind (fun (restList, restBindings, vg1) -> + toAtom elem vg1 env typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (elemAtom, elemBindings, vg2) -> + let (pushVar, vg3) = ANF.freshVar vg2 + // Call Stdlib.__FingerTree.push to prepend element + let pushExpr = ANF.Call ("Stdlib.__FingerTree.push_i64", [restList; elemAtom]) + let newBindings = restBindings @ elemBindings @ [(pushVar, pushExpr)] + (ANF.Var pushVar, newBindings, vg3))) + + if List.isEmpty headElements then + Ok (tailAtom, tailBindings, varGen1) + else + buildList headElements varGen1 tailAtom tailBindings) + + | AST.InterpolatedString parts -> + // Desugar interpolated string to StringConcat chain + let partToExpr (part: AST.StringPart) : AST.Expr = + match part with + | AST.StringText s -> AST.StringLiteral s + | AST.StringExpr e -> e + match parts with + | [] -> + // Empty interpolated string → empty string + Ok (ANF.StringLiteral "", [], varGen) + | [single] -> + // Single part → convert directly + toAtom (partToExpr single) varGen env typeReg variantLookup funcReg moduleRegistry + | first :: rest -> + // Multiple parts → desugar to StringConcat and convert + let desugared = + rest + |> List.fold (fun acc part -> + AST.BinOp (AST.StringConcat, acc, partToExpr part)) + (partToExpr first) + toAtom desugared varGen env typeReg variantLookup funcReg moduleRegistry + + | AST.Match (scrutinee, cases) -> + // Match in atom position - compile and extract result + toANF (AST.Match (scrutinee, cases)) varGen env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (matchExpr, varGen1) -> + // The match compiles to an if-else chain that returns a value + // We need to extract that value into a temp variable + // For now, just return an error - complex match in atom position needs more work + Error "Match expressions in atom position not yet supported (use let binding)") + + | AST.Lambda (_parameters, _body) -> + // Lambda in atom position - closures not yet fully implemented + Error "Lambda expressions (closures) are not yet fully implemented" + + | AST.Apply (func, args) -> + // Apply in atom position - convert via toANF and extract result + let argsList = exprArgsToList args + match func with + | AST.Lambda (parameters, body) -> + // Immediate application: desugar to let bindings + let parameterList = paramsToList parameters + if List.length argsList <> List.length parameterList then + Error $"Lambda expects {List.length parameterList} arguments, got {List.length argsList}" + else + let rec buildLets (ps: (string * AST.Type) list) (as': AST.Expr list) : AST.Expr = + match ps, as' with + | [], [] -> body + | (pName, _) :: restPs, argExpr :: restAs -> + AST.Let (pName, argExpr, buildLets restPs restAs) + | _ -> body + let desugared = buildLets parameterList argsList + toAtom desugared varGen env typeReg variantLookup funcReg moduleRegistry + + | AST.Apply (innerFunc, innerArgs) -> + // Nested application in atom position: ((x) => (y) => ...)(a)(b) + let innerArgsList = exprArgsToList innerArgs + match innerFunc with + | AST.Lambda (innerParams, innerBody) -> + let innerParamList = paramsToList innerParams + if List.length innerArgsList <> List.length innerParamList then + Error $"Inner lambda expects {List.length innerParamList} arguments, got {List.length innerArgsList}" + else + let rec buildLets (ps: (string * AST.Type) list) (as': AST.Expr list) : AST.Expr = + match ps, as' with + | [], [] -> innerBody + | (pName, _) :: restPs, argExpr :: restAs -> + AST.Let (pName, argExpr, buildLets restPs restAs) + | _ -> innerBody + let desugaredInner = buildLets innerParamList innerArgsList + toAtom (AST.Apply (desugaredInner, args)) varGen env typeReg variantLookup funcReg moduleRegistry + | _ -> + // Inner is complex - evaluate inner, then call as closure + toAtom (AST.Apply (innerFunc, innerArgs)) varGen env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (closureAtom, closureBindings, varGen1) -> + let rec convertArgs (remaining: AST.Expr list) (vg: ANF.VarGen) (acc: (ANF.Atom * (ANF.TempId * ANF.CExpr) list) list) = + match remaining with + | [] -> Ok (List.rev acc, vg) + | arg :: rest -> + toAtom arg vg env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (argAtom, argBindings, vg') -> + convertArgs rest vg' ((argAtom, argBindings) :: acc)) + convertArgs argsList varGen1 [] + |> Result.bind (fun (argResults, varGen2) -> + let argAtoms = argResults |> List.map fst + let argBindings = argResults |> List.collect snd + let (resultId, varGen3) = ANF.freshVar varGen2 + let closureCall = ANF.ClosureCall (closureAtom, argAtoms) + let allBindings = closureBindings @ argBindings @ [(resultId, closureCall)] + Ok (ANF.Var resultId, allBindings, varGen3))) + + | AST.Let (letName, letValue, letBody) -> + // Apply(let x = v in body, args) in atom position + // Float the let out and recurse + toAtom (AST.Let (letName, letValue, AST.Apply (letBody, args))) varGen env typeReg variantLookup funcReg moduleRegistry + + | AST.Var name -> + // Variable call in atom position - treat as closure call + match Map.tryFind name env with + | Some (tempId, _) -> + let rec convertArgs (remaining: AST.Expr list) (vg: ANF.VarGen) (acc: (ANF.Atom * (ANF.TempId * ANF.CExpr) list) list) = + match remaining with + | [] -> Ok (List.rev acc, vg) + | arg :: rest -> + toAtom arg vg env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (argAtom, argBindings, vg') -> + convertArgs rest vg' ((argAtom, argBindings) :: acc)) + convertArgs argsList varGen [] + |> Result.bind (fun (argResults, varGen1) -> + let argAtoms = argResults |> List.map fst + let allBindings = argResults |> List.collect snd + let (resultId, varGen2) = ANF.freshVar varGen1 + let closureCall = ANF.ClosureCall (ANF.Var tempId, argAtoms) + let finalBindings = allBindings @ [(resultId, closureCall)] + Ok (ANF.Var resultId, finalBindings, varGen2)) + | None -> + Error $"Cannot apply variable '{name}' as function in atom position - variable not in scope" + + | AST.Closure (funcName, captures) -> + // Closure call in atom position + let rec convertCaptures (caps: AST.Expr list) (vg: ANF.VarGen) (acc: (ANF.Atom * (ANF.TempId * ANF.CExpr) list) list) = + match caps with + | [] -> Ok (List.rev acc, vg) + | cap :: rest -> + toAtom cap vg env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (capAtom, capBindings, vg') -> + convertCaptures rest vg' ((capAtom, capBindings) :: acc)) + convertCaptures captures varGen [] + |> Result.bind (fun (captureResults, varGen1) -> + let captureAtoms = captureResults |> List.map fst + let captureBindings = captureResults |> List.collect snd + let (closureId, varGen2) = ANF.freshVar varGen1 + let closureAlloc = ANF.ClosureAlloc (funcName, captureAtoms) + let rec convertArgs (remaining: AST.Expr list) (vg: ANF.VarGen) (acc: (ANF.Atom * (ANF.TempId * ANF.CExpr) list) list) = + match remaining with + | [] -> Ok (List.rev acc, vg) + | arg :: rest -> + toAtom arg vg env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (argAtom, argBindings, vg') -> + convertArgs rest vg' ((argAtom, argBindings) :: acc)) + convertArgs argsList varGen2 [] + |> Result.bind (fun (argResults, varGen3) -> + let argAtoms = argResults |> List.map fst + let argBindings = argResults |> List.collect snd + let (resultId, varGen4) = ANF.freshVar varGen3 + let closureCall = ANF.ClosureCall (ANF.Var closureId, argAtoms) + let allBindings = captureBindings @ [(closureId, closureAlloc)] @ argBindings @ [(resultId, closureCall)] + Ok (ANF.Var resultId, allBindings, varGen4))) + + | _ -> + // General function-expression application in atom position. + toAtom func varGen env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (funcAtom, funcBindings, varGen1) -> + let rec convertArgs + (remaining: AST.Expr list) + (vg: ANF.VarGen) + (acc: (ANF.Atom * (ANF.TempId * ANF.CExpr) list) list) + : Result<(ANF.Atom * (ANF.TempId * ANF.CExpr) list) list * ANF.VarGen, string> = + match remaining with + | [] -> Ok (List.rev acc, vg) + | arg :: rest -> + toAtom arg vg env typeReg variantLookup funcReg moduleRegistry + |> Result.bind (fun (argAtom, argBindings, vg') -> + convertArgs rest vg' ((argAtom, argBindings) :: acc)) + + convertArgs argsList varGen1 [] + |> Result.map (fun (argResults, varGen2) -> + let argAtoms = argResults |> List.map fst + let argBindings = argResults |> List.collect snd + let (resultId, varGen3) = ANF.freshVar varGen2 + let closureCall = ANF.ClosureCall (funcAtom, argAtoms) + let allBindings = funcBindings @ argBindings @ [(resultId, closureCall)] + (ANF.Var resultId, allBindings, varGen3))) + +/// Replace Return sites in an AExpr with a continuation expression. +and bindReturns (expr: ANF.AExpr) (k: ANF.Atom -> ANF.AExpr) : ANF.AExpr = + match expr with + | ANF.Return atom -> + k atom + | ANF.Let (id, cexpr, rest) -> + ANF.Let (id, cexpr, bindReturns rest k) + | ANF.If (cond, thenBranch, elseBranch) -> + ANF.If (cond, bindReturns thenBranch k, bindReturns elseBranch k) + +/// Convert an expression to an ANF expression that returns a stable atom variable. +/// Falls back to full toANF when the expression cannot be lowered directly to toAtom. +and toANFBoundAtom + (expr: AST.Expr) + (varGen: ANF.VarGen) + (env: VarEnv) + (typeReg: TypeRegistry) + (variantLookup: VariantLookup) + (funcReg: FunctionRegistry) + (moduleRegistry: AST.ModuleRegistry) + : Result = + match toAtom expr varGen env typeReg variantLookup funcReg moduleRegistry with + | Ok (atom, bindings, vg1) -> + // Keep existing atom lowering behavior unchanged when toAtom succeeds: + // do not introduce extra temp ids in the common path. + Ok (wrapBindings bindings (ANF.Return atom), atom, vg1) + | Error _ -> + let (boundVar, vg1) = ANF.freshVar varGen + toANF expr vg1 env typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (exprA, vg2) -> + let boundExpr = + bindReturns exprA (fun atom -> + ANF.Let (boundVar, ANF.Atom atom, ANF.Return (ANF.Var boundVar))) + (boundExpr, ANF.Var boundVar, vg2)) + +/// Wrap let bindings around an expression +and wrapBindings (bindings: (ANF.TempId * ANF.CExpr) list) (expr: ANF.AExpr) : ANF.AExpr = + List.foldBack (fun (var, cexpr) acc -> ANF.Let (var, cexpr, acc)) bindings expr + +/// Convert a function definition to ANF +/// VarGen is passed in and out to maintain globally unique TempIds across functions +/// (needed for TypeMap which maps TempId -> Type across the whole program) +let convertFunction (funcDef: AST.FunctionDef) (varGen: ANF.VarGen) (typeReg: TypeRegistry) (variantLookup: VariantLookup) (funcReg: FunctionRegistry) (moduleRegistry: AST.ModuleRegistry) : Result = + let loweredParams = paramsToList funcDef.Params |> normalizeSyntheticNullaryParams + + // Allocate TempIds for parameters, bundled with their types + let (typedParams, varGen1) = + loweredParams + |> List.fold (fun (acc, vg) (_, typ) -> + let (tempId, vg') = ANF.freshVar vg + (acc @ [{ ANF.TypedParam.Id = tempId; Type = typ }], vg')) ([], varGen) + + // Build environment mapping param names to (TempId, Type) + let paramEnv : VarEnv = + List.zip loweredParams typedParams + |> List.map (fun ((name, _), typedParam) -> (name, (typedParam.Id, typedParam.Type))) + |> Map.ofList + + // Convert body + toANF funcDef.Body varGen1 paramEnv typeReg variantLookup funcReg moduleRegistry + |> Result.map (fun (body, varGen2) -> + ({ Name = funcDef.Name + TypedParams = typedParams + ReturnType = funcDef.ReturnType + ReturnOwnership = ANF.OwnedReturn + Body = body }, varGen2)) + +/// Result type that includes registries needed for later passes +type ConversionResult = { + Program: ANF.Program + TypeReg: TypeRegistry + VariantLookup: VariantLookup + FuncReg: FunctionRegistry + FuncParams: Map // Function name -> param list with types + ModuleRegistry: AST.ModuleRegistry +} + +/// Result type for user-only ANF conversion (functions not merged with stdlib) +/// Used for compiling user code separately from the prebuilt stdlib +type UserOnlyResult = { + UserFunctions: ANF.Function list // Only user functions, not merged with stdlib + MainExpr: ANF.AExpr // User's main expression + TypeReg: TypeRegistry // Merged registries (for lookups) + VariantLookup: VariantLookup + FuncReg: FunctionRegistry + LocalReturnTypes: Map + FuncParams: Map + ModuleRegistry: AST.ModuleRegistry +} + +/// Registry bundle used during ANF conversion +type Registries = { + TypeReg: TypeRegistry + VariantLookup: VariantLookup + FuncReg: FunctionRegistry + FuncParams: Map + ModuleRegistry: AST.ModuleRegistry +} + +/// Split program into type defs, function defs, and a single expression +let splitTopLevels (program: AST.Program) : Result = + let (AST.Program topLevels) = program + let typeDefs = + topLevels + |> List.choose (function AST.TypeDef t -> Some t | _ -> None) + let functions = + topLevels + |> List.choose (function AST.FunctionDef f -> Some f | _ -> None) + let expressions = + topLevels + |> List.choose (function AST.Expression e -> Some e | _ -> None) + + let hasMainFunc = functions |> List.exists (fun f -> f.Name = "main") + let hasStartFunc = functions |> List.exists (fun f -> f.Name = "_start") + if hasMainFunc then + Error "Function name 'main' is reserved" + elif hasStartFunc then + Error "Function name '_start' is reserved" + else + match expressions with + | [expr] -> Ok (typeDefs, functions, expr) + | [] -> Error "Program must have a main expression" + | _ -> Error "Multiple top-level expressions not allowed" + +/// Build alias registry from type definitions +let buildAliasRegistry (typeDefs: AST.TypeDef list) : AliasRegistry = + typeDefs + |> List.choose (function + | AST.TypeAlias (name, typeParams, targetType) -> Some (name, (typeParams, targetType)) + | _ -> None) + |> Map.ofList + +/// Resolve type aliases inside function definitions +let resolveAliasesInFunctions (aliasReg: AliasRegistry) (functions: AST.FunctionDef list) : AST.FunctionDef list = + functions |> List.map (resolveAliasesInFunction aliasReg) + +/// Build registries from type and function definitions +let buildRegistries + (moduleRegistry: AST.ModuleRegistry) + (typeDefs: AST.TypeDef list) + (aliasReg: AliasRegistry) + (functions: AST.FunctionDef list) + : Registries = + let typeRegBase : TypeRegistry = + typeDefs + |> List.choose (function + | AST.RecordDef (name, _typeParams, fields) -> Some (name, fields) + | _ -> None) + |> Map.ofList + + let variantLookup : VariantLookup = + typeDefs + |> List.choose (function + | AST.SumTypeDef (typeName, typeParams, variants) -> + Some (typeName, typeParams, variants) + | _ -> None) + |> List.collect (fun (typeName, typeParams, variants) -> + variants + |> List.mapi (fun idx variant -> (variant.Name, (typeName, typeParams, idx, variant.Payload)))) + |> Map.ofList + + let typeReg = expandTypeRegWithAliases typeRegBase aliasReg + + let funcReg : FunctionRegistry = + functions + |> List.map (fun f -> + let paramTypes = f.Params |> paramsToList |> normalizeSyntheticNullaryParams |> List.map snd + let funcType = AST.TFunction (paramTypes, f.ReturnType) + (f.Name, funcType)) + |> Map.ofList + + let userFuncParams : Map = + functions + |> List.map (fun f -> (f.Name, paramsToList f.Params)) + |> Map.ofList + + let moduleFuncParams : Map = + moduleRegistry + |> Map.toList + |> List.map (fun (qualifiedName, moduleFunc) -> + let paramList = moduleFunc.ParamTypes |> List.mapi (fun i t -> ($"arg{i}", t)) + (qualifiedName, paramList)) + |> Map.ofList + + let funcParams = + Map.fold (fun acc k v -> Map.add k v acc) userFuncParams moduleFuncParams + + { + TypeReg = typeReg + VariantLookup = variantLookup + FuncReg = funcReg + FuncParams = funcParams + ModuleRegistry = moduleRegistry + } + +/// Merge registries with overlay taking precedence (module registry stays from base) +let mergeRegistries (baseRegs: Registries) (overlay: Registries) : Registries = + let mergeMaps m1 m2 = Map.fold (fun acc k v -> Map.add k v acc) m1 m2 + { + TypeReg = mergeMaps baseRegs.TypeReg overlay.TypeReg + VariantLookup = mergeMaps baseRegs.VariantLookup overlay.VariantLookup + FuncReg = mergeMaps baseRegs.FuncReg overlay.FuncReg + FuncParams = mergeMaps baseRegs.FuncParams overlay.FuncParams + ModuleRegistry = baseRegs.ModuleRegistry + } + +/// Convert functions to ANF, returning updated VarGen +let convertFunctions + (registries: Registries) + (varGen: ANF.VarGen) + (functions: AST.FunctionDef list) + : Result = + let rec loop funcs vg acc = + match funcs with + | [] -> Ok (List.rev acc, vg) + | func :: rest -> + convertFunction func vg registries.TypeReg registries.VariantLookup registries.FuncReg registries.ModuleRegistry + |> Result.bind (fun (anfFunc, vg') -> + loop rest vg' (anfFunc :: acc)) + loop functions varGen [] + +/// Convert an expression to ANF with the given VarGen +let convertExprToAnf + (registries: Registries) + (varGen: ANF.VarGen) + (expr: AST.Expr) + : Result = + let emptyEnv : VarEnv = Map.empty + toANF expr varGen emptyEnv registries.TypeReg registries.VariantLookup registries.FuncReg registries.ModuleRegistry + +/// Synthesize an entrypoint function from a main expression +let synthesizeEntryFunction (name: string) (returnType: AST.Type) (body: ANF.AExpr) : ANF.Function = + { Name = name + TypedParams = [] + ReturnType = returnType + ReturnOwnership = ANF.OwnedReturn + Body = body } diff --git a/backend/src/LibCompiler/passes/3.1_SSA_Construction.fs b/backend/src/LibCompiler/passes/3.1_SSA_Construction.fs new file mode 100644 index 0000000000..2985ad631b --- /dev/null +++ b/backend/src/LibCompiler/passes/3.1_SSA_Construction.fs @@ -0,0 +1,999 @@ +// 3.1_SSA_Construction.fs - SSA Construction Pass +// +// Converts MIR to SSA (Static Single Assignment) form by: +// 1. Computing dominators and dominance frontiers +// 2. Inserting phi nodes at join points +// 3. Renaming variables so each definition has a unique name +// +// After SSA construction, every virtual register is defined exactly once. +// This enables powerful optimizations like GVN, SCCP, and easy DCE. + +module SSA_Construction + +open MIR + +/// Predecessors map: for each label, which labels can jump to it +type Predecessors = Map + +type private LabelIndex = { + Labels: Label array + IndexOf: Map +} + +let private buildLabelIndex (cfg: CFG) : LabelIndex = + let labels = cfg.Blocks |> Map.keys |> Seq.toArray + let indexOf = + labels + |> Array.mapi (fun idx label -> (label, idx)) + |> Array.toList + |> Map.ofList + { Labels = labels; IndexOf = indexOf } + +/// Build predecessors map from CFG +let buildPredecessors (cfg: CFG) : Predecessors = + let addEdge (from: Label) (toLabel: Label) (preds: Predecessors) : Predecessors = + let existing = Map.tryFind toLabel preds |> Option.defaultValue [] + Map.add toLabel (from :: existing) preds + + cfg.Blocks + |> Map.fold (fun preds label block -> + // Add edges from terminator + match block.Terminator with + | Ret _ -> preds + | Jump target -> addEdge label target preds + | Branch (_, trueLabel, falseLabel) -> + preds |> addEdge label trueLabel |> addEdge label falseLabel + ) Map.empty + +/// Compute immediate dominators using iterative dataflow +/// Returns map from label to its immediate dominator +type Dominators = Map + +let computeDominators (cfg: CFG) (preds: Predecessors) : Dominators = + let labelIndex = buildLabelIndex cfg + let labels = labelIndex.Labels |> Array.toList + let entry = cfg.Entry + + // First, compute reachable blocks from entry using BFS + // This is critical because unreachable blocks have no well-defined dominators + // and would cause cycles in the idom tree if included + let rec findReachable (queue: Label list) (visited: Set, list2: List) : List<(a, b)> = + match (list1, list2) with + | ([], _) -> [] + | (_, []) -> [] + | ([h1, ...t1], [h2, ...t2]) -> [(h1, h2), ...Stdlib.List.zip(t1, t2)] diff --git a/backend/src/LibCompiler/stdlib/Int16.dark b/backend/src/LibCompiler/stdlib/Int16.dark new file mode 100644 index 0000000000..a78636df1e --- /dev/null +++ b/backend/src/LibCompiler/stdlib/Int16.dark @@ -0,0 +1,100 @@ +// Int16.dark - Stdlib.Int16 definitions +// +// Split from stdlib.dark for modular stdlib loading. + +// Stdlib.Int16 - Integer operations + +def Stdlib.Int16.add(a: Int16, b: Int16) : Int16 = a + b + +def Stdlib.Int16.sub(a: Int16, b: Int16) : Int16 = a - b + +def Stdlib.Int16.mul(a: Int16, b: Int16) : Int16 = a * b + +def Stdlib.Int16.div(a: Int16, b: Int16) : Int16 = a / b + +def Stdlib.Int16.max(a: Int16, b: Int16) : Int16 = if a > b then a else b + +def Stdlib.Int16.min(a: Int16, b: Int16) : Int16 = if a < b then a else b + +def Stdlib.Int16.mod(a: Int16, b: Int16) : Int16 = a % b + +def Stdlib.Int16.absoluteValue(a: Int16) : Int16 = if a < 0s then 0s - a else a + +def Stdlib.Int16.negate(a: Int16) : Int16 = 0s - a + +def Stdlib.Int16.power(base: Int16, exponent: Int16) : Int16 = + if exponent == 0s then 1s + else if exponent == 1s then base + else base * Stdlib.Int16.power(base, exponent - 1s) + +def Stdlib.Int16.clamp(value: Int16, limitA: Int16, limitB: Int16) : Int16 = + let lower = Stdlib.Int16.min(limitA, limitB) in + let upper = Stdlib.Int16.max(limitA, limitB) in + Stdlib.Int16.max(lower, Stdlib.Int16.min(upper, value)) + +def Stdlib.Int16.greaterThan(a: Int16, b: Int16) : Bool = a > b + +def Stdlib.Int16.greaterThanOrEqualTo(a: Int16, b: Int16) : Bool = a >= b + +def Stdlib.Int16.lessThan(a: Int16, b: Int16) : Bool = a < b + +def Stdlib.Int16.lessThanOrEqualTo(a: Int16, b: Int16) : Bool = a <= b + +// Bitwise operations +def Stdlib.Int16.bitwiseAnd(a: Int16, b: Int16) : Int16 = a & b + +def Stdlib.Int16.bitwiseOr(a: Int16, b: Int16) : Int16 = a ||| b + +def Stdlib.Int16.bitwiseXor(a: Int16, b: Int16) : Int16 = a ^ b + +def Stdlib.Int16.shiftLeft(a: Int16, shift: Int16) : Int16 = a << shift + +def Stdlib.Int16.shiftRight(a: Int16, shift: Int16) : Int16 = a >> shift + +def Stdlib.Int16.bitwiseNot(a: Int16) : Int16 = ~~~a + +// Count number of set bits (population count) +// Uses parallel bit counting algorithm (SWAR) +def Stdlib.Int16.popcount(x: Int16) : Int16 = + let mask1 = 21845s in + let mask2 = 13107s in + let mask3 = 3855s in + let mask4 = 31s in + let x = x - ((x >> 1s) & mask1) in + let x = (x & mask2) + ((x >> 2s) & mask2) in + let x = (x + (x >> 4s)) & mask3 in + let x = x + (x >> 8s) in + x & mask4 + +// Convert a single digit (0-9) to its string representation +def Stdlib.Int16.__digitToString(n: Int16) : String = + match n with + | 0s -> "0" + | 1s -> "1" + | 2s -> "2" + | 3s -> "3" + | 4s -> "4" + | 5s -> "5" + | 6s -> "6" + | 7s -> "7" + | 8s -> "8" + | 9s -> "9" + | _ -> "?" + +// Convert an integer to its string representation +def Stdlib.Int16.toString(n: Int16) : String = + if n < 0s then "-" ++ Stdlib.Int16.toString(0s - n) + else if n < 10s then Stdlib.Int16.__digitToString(n) + else Stdlib.Int16.toString(n / 10s) ++ Stdlib.Int16.__digitToString(n % 10s) + +// Check if integer is even +def Stdlib.Int16.isEven(n: Int16) : Bool = + (n % 2s) == 0s + +// Check if integer is odd +def Stdlib.Int16.isOdd(n: Int16) : Bool = + (n % 2s) != 0s + +// Sum all integers in a list +def Stdlib.Int16.sum(list: List) : Int16 = + Stdlib.List.fold(list, 0s, (acc: Int16, x: Int16) => acc + x) diff --git a/backend/src/LibCompiler/stdlib/Int32.dark b/backend/src/LibCompiler/stdlib/Int32.dark new file mode 100644 index 0000000000..3a0a9c2dc8 --- /dev/null +++ b/backend/src/LibCompiler/stdlib/Int32.dark @@ -0,0 +1,101 @@ +// Int32.dark - Stdlib.Int32 definitions +// +// Split from stdlib.dark for modular stdlib loading. + +// Stdlib.Int32 - Integer operations + +def Stdlib.Int32.add(a: Int32, b: Int32) : Int32 = a + b + +def Stdlib.Int32.sub(a: Int32, b: Int32) : Int32 = a - b + +def Stdlib.Int32.mul(a: Int32, b: Int32) : Int32 = a * b + +def Stdlib.Int32.div(a: Int32, b: Int32) : Int32 = a / b + +def Stdlib.Int32.max(a: Int32, b: Int32) : Int32 = if a > b then a else b + +def Stdlib.Int32.min(a: Int32, b: Int32) : Int32 = if a < b then a else b + +def Stdlib.Int32.mod(a: Int32, b: Int32) : Int32 = a % b + +def Stdlib.Int32.absoluteValue(a: Int32) : Int32 = if a < 0l then 0l - a else a + +def Stdlib.Int32.negate(a: Int32) : Int32 = 0l - a + +def Stdlib.Int32.power(base: Int32, exponent: Int32) : Int32 = + if exponent == 0l then 1l + else if exponent == 1l then base + else base * Stdlib.Int32.power(base, exponent - 1l) + +def Stdlib.Int32.clamp(value: Int32, limitA: Int32, limitB: Int32) : Int32 = + let lower = Stdlib.Int32.min(limitA, limitB) in + let upper = Stdlib.Int32.max(limitA, limitB) in + Stdlib.Int32.max(lower, Stdlib.Int32.min(upper, value)) + +def Stdlib.Int32.greaterThan(a: Int32, b: Int32) : Bool = a > b + +def Stdlib.Int32.greaterThanOrEqualTo(a: Int32, b: Int32) : Bool = a >= b + +def Stdlib.Int32.lessThan(a: Int32, b: Int32) : Bool = a < b + +def Stdlib.Int32.lessThanOrEqualTo(a: Int32, b: Int32) : Bool = a <= b + +// Bitwise operations +def Stdlib.Int32.bitwiseAnd(a: Int32, b: Int32) : Int32 = a & b + +def Stdlib.Int32.bitwiseOr(a: Int32, b: Int32) : Int32 = a ||| b + +def Stdlib.Int32.bitwiseXor(a: Int32, b: Int32) : Int32 = a ^ b + +def Stdlib.Int32.shiftLeft(a: Int32, shift: Int32) : Int32 = a << shift + +def Stdlib.Int32.shiftRight(a: Int32, shift: Int32) : Int32 = a >> shift + +def Stdlib.Int32.bitwiseNot(a: Int32) : Int32 = ~~~a + +// Count number of set bits (population count) +// Uses parallel bit counting algorithm (SWAR) +def Stdlib.Int32.popcount(x: Int32) : Int32 = + let mask1 = 1431655765l in + let mask2 = 858993459l in + let mask3 = 252645135l in + let mask4 = 63l in + let x = x - ((x >> 1l) & mask1) in + let x = (x & mask2) + ((x >> 2l) & mask2) in + let x = (x + (x >> 4l)) & mask3 in + let x = x + (x >> 8l) in + let x = x + (x >> 16l) in + x & mask4 + +// Convert a single digit (0-9) to its string representation +def Stdlib.Int32.__digitToString(n: Int32) : String = + match n with + | 0l -> "0" + | 1l -> "1" + | 2l -> "2" + | 3l -> "3" + | 4l -> "4" + | 5l -> "5" + | 6l -> "6" + | 7l -> "7" + | 8l -> "8" + | 9l -> "9" + | _ -> "?" + +// Convert an integer to its string representation +def Stdlib.Int32.toString(n: Int32) : String = + if n < 0l then "-" ++ Stdlib.Int32.toString(0l - n) + else if n < 10l then Stdlib.Int32.__digitToString(n) + else Stdlib.Int32.toString(n / 10l) ++ Stdlib.Int32.__digitToString(n % 10l) + +// Check if integer is even +def Stdlib.Int32.isEven(n: Int32) : Bool = + (n % 2l) == 0l + +// Check if integer is odd +def Stdlib.Int32.isOdd(n: Int32) : Bool = + (n % 2l) != 0l + +// Sum all integers in a list +def Stdlib.Int32.sum(list: List) : Int32 = + Stdlib.List.fold(list, 0l, (acc: Int32, x: Int32) => acc + x) diff --git a/backend/src/LibCompiler/stdlib/Int64.dark b/backend/src/LibCompiler/stdlib/Int64.dark new file mode 100644 index 0000000000..69aa8373a7 --- /dev/null +++ b/backend/src/LibCompiler/stdlib/Int64.dark @@ -0,0 +1,105 @@ +// Int64.dark - Stdlib.Int64 definitions +// +// Split from stdlib.dark for modular stdlib loading. + +// Stdlib.Int64 - Integer operations + +def Stdlib.Int64.add(a: Int64, b: Int64) : Int64 = a + b + +def Stdlib.Int64.sub(a: Int64, b: Int64) : Int64 = a - b + +def Stdlib.Int64.mul(a: Int64, b: Int64) : Int64 = a * b + +def Stdlib.Int64.div(a: Int64, b: Int64) : Int64 = a / b + +def Stdlib.Int64.max(a: Int64, b: Int64) : Int64 = if a > b then a else b + +def Stdlib.Int64.min(a: Int64, b: Int64) : Int64 = if a < b then a else b + +def Stdlib.Int64.mod(a: Int64, b: Int64) : Int64 = a % b + +def Stdlib.Int64.absoluteValue(a: Int64) : Int64 = if a < 0 then 0 - a else a + +def Stdlib.Int64.negate(a: Int64) : Int64 = 0 - a + +def Stdlib.Int64.power(base: Int64, exponent: Int64) : Int64 = + if exponent == 0 then 1 + else if exponent == 1 then base + else base * Stdlib.Int64.power(base, exponent - 1) + +def Stdlib.Int64.clamp(value: Int64, limitA: Int64, limitB: Int64) : Int64 = + let lower = Stdlib.Int64.min(limitA, limitB) in + let upper = Stdlib.Int64.max(limitA, limitB) in + Stdlib.Int64.max(lower, Stdlib.Int64.min(upper, value)) + +def Stdlib.Int64.greaterThan(a: Int64, b: Int64) : Bool = a > b + +def Stdlib.Int64.greaterThanOrEqualTo(a: Int64, b: Int64) : Bool = a >= b + +def Stdlib.Int64.lessThan(a: Int64, b: Int64) : Bool = a < b + +def Stdlib.Int64.lessThanOrEqualTo(a: Int64, b: Int64) : Bool = a <= b + +// Bitwise operations +def Stdlib.Int64.bitwiseAnd(a: Int64, b: Int64) : Int64 = a & b + +def Stdlib.Int64.bitwiseOr(a: Int64, b: Int64) : Int64 = a ||| b + +def Stdlib.Int64.bitwiseXor(a: Int64, b: Int64) : Int64 = a ^ b + +def Stdlib.Int64.shiftLeft(a: Int64, shift: Int64) : Int64 = a << shift + +def Stdlib.Int64.shiftRight(a: Int64, shift: Int64) : Int64 = a >> shift + +def Stdlib.Int64.bitwiseNot(a: Int64) : Int64 = ~~~a + +// Count number of set bits (population count) +// Uses parallel bit counting algorithm (Brian Kernighan / SWAR) +def Stdlib.Int64.popcount(x: Int64) : Int64 = + // Constants (in decimal): + // 0x5555555555555555 = 6148914691236517205 + // 0x3333333333333333 = 3689348814741910323 + // 0x0F0F0F0F0F0F0F0F = 1085102592571150095 + // 0x0101010101010101 = 72340172838076673 + let mask1 = 6148914691236517205 in + let mask2 = 3689348814741910323 in + let mask3 = 1085102592571150095 in + let mult = 72340172838076673 in + let x = x - ((x >> 1) & mask1) in + let x = (x & mask2) + ((x >> 2) & mask2) in + let x = (x + (x >> 4)) & mask3 in + (x * mult) >> 56 + +// Convert a single digit (0-9) to its string representation +def Stdlib.Int64.__digitToString(n: Int64) : String = + match n with + | 0 -> "0" + | 1 -> "1" + | 2 -> "2" + | 3 -> "3" + | 4 -> "4" + | 5 -> "5" + | 6 -> "6" + | 7 -> "7" + | 8 -> "8" + | 9 -> "9" + | _ -> "?" + +// Convert an integer to its string representation +def Stdlib.Int64.toString(n: Int64) : String = + if n < 0 then "-" ++ Stdlib.Int64.toString(0 - n) + else if n < 10 then Stdlib.Int64.__digitToString(n) + else Stdlib.Int64.toString(n / 10) ++ Stdlib.Int64.__digitToString(n % 10) + +// Check if integer is even +def Stdlib.Int64.isEven(n: Int64) : Bool = + (n % 2) == 0 + +// Check if integer is odd +def Stdlib.Int64.isOdd(n: Int64) : Bool = + (n % 2) != 0 + +// Sum all integers in a list +def Stdlib.Int64.sum(list: List) : Int64 = + Stdlib.List.fold(list, 0, (acc: Int64, x: Int64) => acc + x) + diff --git a/backend/src/LibCompiler/stdlib/Int8.dark b/backend/src/LibCompiler/stdlib/Int8.dark new file mode 100644 index 0000000000..9da78a5ff7 --- /dev/null +++ b/backend/src/LibCompiler/stdlib/Int8.dark @@ -0,0 +1,98 @@ +// Int8.dark - Stdlib.Int8 definitions +// +// Split from stdlib.dark for modular stdlib loading. + +// Stdlib.Int8 - Integer operations + +def Stdlib.Int8.add(a: Int8, b: Int8) : Int8 = a + b + +def Stdlib.Int8.sub(a: Int8, b: Int8) : Int8 = a - b + +def Stdlib.Int8.mul(a: Int8, b: Int8) : Int8 = a * b + +def Stdlib.Int8.div(a: Int8, b: Int8) : Int8 = a / b + +def Stdlib.Int8.max(a: Int8, b: Int8) : Int8 = if a > b then a else b + +def Stdlib.Int8.min(a: Int8, b: Int8) : Int8 = if a < b then a else b + +def Stdlib.Int8.mod(a: Int8, b: Int8) : Int8 = a % b + +def Stdlib.Int8.absoluteValue(a: Int8) : Int8 = if a < 0y then 0y - a else a + +def Stdlib.Int8.negate(a: Int8) : Int8 = 0y - a + +def Stdlib.Int8.power(base: Int8, exponent: Int8) : Int8 = + if exponent == 0y then 1y + else if exponent == 1y then base + else base * Stdlib.Int8.power(base, exponent - 1y) + +def Stdlib.Int8.clamp(value: Int8, limitA: Int8, limitB: Int8) : Int8 = + let lower = Stdlib.Int8.min(limitA, limitB) in + let upper = Stdlib.Int8.max(limitA, limitB) in + Stdlib.Int8.max(lower, Stdlib.Int8.min(upper, value)) + +def Stdlib.Int8.greaterThan(a: Int8, b: Int8) : Bool = a > b + +def Stdlib.Int8.greaterThanOrEqualTo(a: Int8, b: Int8) : Bool = a >= b + +def Stdlib.Int8.lessThan(a: Int8, b: Int8) : Bool = a < b + +def Stdlib.Int8.lessThanOrEqualTo(a: Int8, b: Int8) : Bool = a <= b + +// Bitwise operations +def Stdlib.Int8.bitwiseAnd(a: Int8, b: Int8) : Int8 = a & b + +def Stdlib.Int8.bitwiseOr(a: Int8, b: Int8) : Int8 = a ||| b + +def Stdlib.Int8.bitwiseXor(a: Int8, b: Int8) : Int8 = a ^ b + +def Stdlib.Int8.shiftLeft(a: Int8, shift: Int8) : Int8 = a << shift + +def Stdlib.Int8.shiftRight(a: Int8, shift: Int8) : Int8 = a >> shift + +def Stdlib.Int8.bitwiseNot(a: Int8) : Int8 = ~~~a + +// Count number of set bits (population count) +// Uses parallel bit counting algorithm (SWAR) +def Stdlib.Int8.popcount(x: Int8) : Int8 = + let mask1 = 85y in + let mask2 = 51y in + let mask3 = 15y in + let x = x - ((x >> 1y) & mask1) in + let x = (x & mask2) + ((x >> 2y) & mask2) in + let x = (x + (x >> 4y)) & mask3 in + x + +// Convert a single digit (0-9) to its string representation +def Stdlib.Int8.__digitToString(n: Int8) : String = + match n with + | 0y -> "0" + | 1y -> "1" + | 2y -> "2" + | 3y -> "3" + | 4y -> "4" + | 5y -> "5" + | 6y -> "6" + | 7y -> "7" + | 8y -> "8" + | 9y -> "9" + | _ -> "?" + +// Convert an integer to its string representation +def Stdlib.Int8.toString(n: Int8) : String = + if n < 0y then "-" ++ Stdlib.Int8.toString(0y - n) + else if n < 10y then Stdlib.Int8.__digitToString(n) + else Stdlib.Int8.toString(n / 10y) ++ Stdlib.Int8.__digitToString(n % 10y) + +// Check if integer is even +def Stdlib.Int8.isEven(n: Int8) : Bool = + (n % 2y) == 0y + +// Check if integer is odd +def Stdlib.Int8.isOdd(n: Int8) : Bool = + (n % 2y) != 0y + +// Sum all integers in a list +def Stdlib.Int8.sum(list: List) : Int8 = + Stdlib.List.fold(list, 0y, (acc: Int8, x: Int8) => acc + x) diff --git a/backend/src/LibCompiler/stdlib/List.dark b/backend/src/LibCompiler/stdlib/List.dark new file mode 100644 index 0000000000..3e4b8b1434 --- /dev/null +++ b/backend/src/LibCompiler/stdlib/List.dark @@ -0,0 +1,322 @@ +// List.dark - Stdlib.List definitions +// +// Split from stdlib.dark for modular stdlib loading. + +// Stdlib.List - List operations +// Lists are now FingerTrees internally for O(1) push/pushBack and O(log n) indexing + +// Check if list is empty - O(1) +def Stdlib.List.isEmpty(list: List) : Bool = + Stdlib.__FingerTree.isEmpty(list) + +// Get the length of a list - O(1) +def Stdlib.List.length(list: List) : Int64 = + Stdlib.__FingerTree.length(list) + +// Compare two lists for structural equality - O(n) +def Stdlib.List.equals(left: List, right: List) : Bool = + if Stdlib.__FingerTree.isEmpty(left) then + Stdlib.__FingerTree.isEmpty(right) + else if Stdlib.__FingerTree.isEmpty(right) then + false + else + match Stdlib.__FingerTree.head(left) with + | None -> false + | Some(leftHead) -> + match Stdlib.__FingerTree.head(right) with + | None -> false + | Some(rightHead) -> + if leftHead == rightHead then + let leftTail = Stdlib.__FingerTree.tail(left) in + let rightTail = Stdlib.__FingerTree.tail(right) in + Stdlib.List.equals(leftTail, rightTail) + else false + +// Create a single-element list - O(1) +def Stdlib.List.singleton(value: t) : List = + Stdlib.__FingerTree.singleton(value) + +// Prepend an element to a list - O(1) amortized +def Stdlib.List.push(list: List, value: t) : List = + Stdlib.__FingerTree.push(list, value) + +// Internal: force concrete monomorphization of push for compiler-generated list literals +def Stdlib.List.__pushInt64(list: List, value: Int64) : List = + Stdlib.__FingerTree.push(list, value) + +// Apply a function to each element of a list - O(n) +def Stdlib.List.map(list: List, fn: (a) -> b) : List = + Stdlib.List.__mapHelper(list, fn, Stdlib.__FingerTree.empty()) + +def Stdlib.List.__mapHelper(list: List, fn: (a) -> b, acc: List) : List = + if Stdlib.__FingerTree.isEmpty(list) then acc + else + match Stdlib.__FingerTree.head(list) with + | None -> acc + | Some(h) -> + let newAcc = Stdlib.__FingerTree.pushBack(acc, fn(h)) in + Stdlib.List.__mapHelper(Stdlib.__FingerTree.tail(list), fn, newAcc) + +// Flatten a list of lists into a single list - O(n*m) +def Stdlib.List.flatten(lists: List>) : List = + Stdlib.List.__flattenHelper(lists, Stdlib.__FingerTree.empty()) + +def Stdlib.List.__flattenHelper(lists: List>, acc: List) : List = + if Stdlib.__FingerTree.isEmpty>(lists) then acc + else + match Stdlib.__FingerTree.head>(lists) with + | None -> acc + | Some(h) -> + let newAcc = Stdlib.List.append(acc, h) in + Stdlib.List.__flattenHelper(Stdlib.__FingerTree.tail>(lists), newAcc) + +// Apply a function that returns a list and flatten the results +def Stdlib.List.flatMap(list: List, fn: (a) -> List) : List = + Stdlib.List.flatten(Stdlib.List.map>(list, fn)) + +// Keep only elements that satisfy a predicate - O(n) +def Stdlib.List.filter(list: List, fn: (a) -> Bool) : List = + let len = Stdlib.__FingerTree.length(list) in + Stdlib.List.__filterByIndexHelper(list, fn, 0, len, Stdlib.__FingerTree.empty()) + +def Stdlib.List.__filterHelper(list: List, fn: (a) -> Bool, acc: List) : List = + let len = Stdlib.__FingerTree.length(list) in + let filtered = Stdlib.List.__filterByIndexHelper(list, fn, 0, len, Stdlib.__FingerTree.empty()) in + Stdlib.List.append(acc, filtered) + +def Stdlib.List.__filterByIndexHelper(list: List, fn: (a) -> Bool, index: Int64, len: Int64, accRev: List) : List = + if index >= len then + Stdlib.List.reverse(accRev) + else + match Stdlib.__FingerTree.getAt(list, index) with + | None -> Stdlib.List.reverse(accRev) + | Some(v) -> + let nextAccRev = if fn(v) then [v, ...accRev] else accRev in + Stdlib.List.__filterByIndexHelper(list, fn, index + 1, len, nextAccRev) + +// Append an element to the end of a list - O(1) amortized +def Stdlib.List.pushBack(list: List, value: a) : List = + Stdlib.__FingerTree.pushBack(list, value) + +// Concatenate two lists - O(log min(n,m)) +def Stdlib.List.append(list1: List, list2: List) : List = + Stdlib.__FingerTree.concat(list1, list2) + +// Reverse a list - O(n) +def Stdlib.List.reverse(list: List) : List = + let len = Stdlib.__FingerTree.length(list) in + Stdlib.List.__reverseByIndexHelper(list, len - 1, Stdlib.__FingerTree.empty()) + +def Stdlib.List.__reverseHelper(list: List, acc: List) : List = + let len = Stdlib.__FingerTree.length(list) in + Stdlib.List.__reverseByIndexHelper(list, len - 1, acc) + +def Stdlib.List.__reverseByIndexHelper(list: List, index: Int64, acc: List) : List = + if index < 0 then acc + else + match Stdlib.__FingerTree.getAt(list, index) with + | None -> acc + | Some(v) -> + Stdlib.List.__reverseByIndexHelper(list, index - 1, Stdlib.__FingerTree.pushBack(acc, v)) + +// Fold left (reduce) over a list - O(n) +def Stdlib.List.fold(list: List, init: b, fn: (b, a) -> b) : b = + if Stdlib.__FingerTree.isEmpty(list) then init + else + match Stdlib.__FingerTree.head(list) with + | None -> init + | Some(h) -> + let newInit = fn(init, h) in + Stdlib.List.fold(Stdlib.__FingerTree.tail(list), newInit, fn) + +// Get head of list or return None - O(1) +def Stdlib.List.head(list: List) : Stdlib.Option.Option = + Stdlib.__FingerTree.head(list) + +// Internal: get head without option wrapper (caller must ensure non-empty) +// This forces monomorphization of headUnsafe_i64 for pattern matching +def Stdlib.List.__headUnsafeInt64(list: List) : Int64 = + Stdlib.__FingerTree.headUnsafe(list) + +// Internal: get head without option wrapper for Float lists +def Stdlib.List.__headUnsafeFloat(list: List) : Float = + Stdlib.__FingerTree.headUnsafe(list) + +// Internal: get element at index (forces monomorphization for pattern matching) +def Stdlib.List.__getAtInt64(list: List, idx: Int64) : Stdlib.Option.Option = + Stdlib.__FingerTree.getAt(list, idx) + +def Stdlib.List.__getAtFloat(list: List, idx: Int64) : Stdlib.Option.Option = + Stdlib.__FingerTree.getAt(list, idx) + +// Get tail of list or return None - O(1) amortized +def Stdlib.List.tail(list: List) : Stdlib.Option.Option> = + if Stdlib.__FingerTree.isEmpty(list) then None + else Some(Stdlib.__FingerTree.tail(list)) + +// Get element at index (0-based) - O(log n) +def Stdlib.List.getAt(list: List, index: Int64) : Stdlib.Option.Option = + Stdlib.__FingerTree.getAt(list, index) + +// Set element at index (0-based) - O(log n), returns original list if index out of bounds +def Stdlib.List.setAt(list: List, index: Int64, value: a) : List = + Stdlib.__FingerTree.setAt(list, index, value) + +// Find first element satisfying a predicate - O(n) +def Stdlib.List.findFirst(list: List, fn: (a) -> Bool) : Stdlib.Option.Option = + if Stdlib.__FingerTree.isEmpty(list) then None + else + match Stdlib.__FingerTree.head(list) with + | None -> None + | Some(h) -> + if fn(h) then Some(h) + else Stdlib.List.findFirst(Stdlib.__FingerTree.tail(list), fn) + +// Take first n elements - O(n) +def Stdlib.List.take(list: List, n: Int64) : List = + Stdlib.List.__takeHelper(list, n, Stdlib.__FingerTree.empty()) + +def Stdlib.List.__takeHelper(list: List, n: Int64, acc: List) : List = + if n <= 0 then acc + else if Stdlib.__FingerTree.isEmpty(list) then acc + else + match Stdlib.__FingerTree.head(list) with + | None -> acc + | Some(h) -> + let newAcc = Stdlib.__FingerTree.pushBack(acc, h) in + Stdlib.List.__takeHelper(Stdlib.__FingerTree.tail(list), n - 1, newAcc) + +// Drop first n elements - O(n) +def Stdlib.List.drop(list: List, n: Int64) : List = + if n <= 0 then list + else if Stdlib.__FingerTree.isEmpty(list) then list + else Stdlib.List.drop(Stdlib.__FingerTree.tail(list), n - 1) + +// Check if all elements satisfy a predicate - O(n) +def Stdlib.List.forAll(list: List, fn: (a) -> Bool) : Bool = + if Stdlib.__FingerTree.isEmpty(list) then true + else + match Stdlib.__FingerTree.head(list) with + | None -> true + | Some(h) -> + if fn(h) then Stdlib.List.forAll(Stdlib.__FingerTree.tail(list), fn) + else false + +// Check if any element satisfies a predicate - O(n) +def Stdlib.List.exists(list: List, fn: (a) -> Bool) : Bool = + if Stdlib.__FingerTree.isEmpty(list) then false + else + match Stdlib.__FingerTree.head(list) with + | None -> false + | Some(h) -> + if fn(h) then true + else Stdlib.List.exists(Stdlib.__FingerTree.tail(list), fn) + +// Get the last element of a list, or None if empty - O(1) +def Stdlib.List.last(list: List) : Stdlib.Option.Option = + Stdlib.__FingerTree.last(list) + +// Remove the last element from a list - O(1) amortized +def Stdlib.List.dropLast(list: List) : List = + Stdlib.__FingerTree.init(list) + +// Generate a list of integers from start (inclusive) to end (exclusive) +def Stdlib.List.range(start: Int64, end_: Int64) : List = + Stdlib.List.__rangeHelper(start, end_, Stdlib.__FingerTree.empty()) + +def Stdlib.List.__rangeHelper(current: Int64, end_: Int64, acc: List) : List = + if current >= end_ then acc + else Stdlib.List.__rangeHelper(current + 1, end_, Stdlib.__FingerTree.pushBack(acc, current)) + +// Repeat a value n times +def Stdlib.List.repeat(value: a, count: Int64) : List = + Stdlib.List.__repeatHelper(value, count, Stdlib.__FingerTree.empty()) + +def Stdlib.List.__repeatHelper(value: a, count: Int64, acc: List) : List = + if count <= 0 then acc + else Stdlib.List.__repeatHelper(value, count - 1, Stdlib.__FingerTree.pushBack(acc, value)) + +// Map with index: apply a function to each element along with its index - O(n) +def Stdlib.List.indexedMap(list: List, fn: (Int64, a) -> b) : List = + Stdlib.List.__indexedMapHelper(list, fn, 0, Stdlib.__FingerTree.empty()) + +def Stdlib.List.__indexedMapHelper(list: List, fn: (Int64, a) -> b, index: Int64, acc: List) : List = + if Stdlib.__FingerTree.isEmpty(list) then acc + else + match Stdlib.__FingerTree.head(list) with + | None -> acc + | Some(h) -> + let newAcc = Stdlib.__FingerTree.pushBack(acc, fn(index, h)) in + Stdlib.List.__indexedMapHelper(Stdlib.__FingerTree.tail(list), fn, index + 1, newAcc) + +// Partition a list into two lists based on a predicate +// Returns (elements where predicate is true, elements where predicate is false) +def Stdlib.List.partition(list: List, fn: (a) -> Bool) : (List, List) = + Stdlib.List.__partitionHelper(list, fn, Stdlib.__FingerTree.empty(), Stdlib.__FingerTree.empty()) + +def Stdlib.List.__partitionHelper(list: List, fn: (a) -> Bool, trueAcc: List, falseAcc: List) : (List, List) = + if Stdlib.__FingerTree.isEmpty(list) then (trueAcc, falseAcc) + else + match Stdlib.__FingerTree.head(list) with + | None -> (trueAcc, falseAcc) + | Some(h) -> + let newTrue = if fn(h) then Stdlib.__FingerTree.pushBack(trueAcc, h) else trueAcc in + let newFalse = if fn(h) then falseAcc else Stdlib.__FingerTree.pushBack(falseAcc, h) in + Stdlib.List.__partitionHelper(Stdlib.__FingerTree.tail(list), fn, newTrue, newFalse) + +// Alias for forAll (darklang naming convention) +def Stdlib.List.all(list: List, fn: (a) -> Bool) : Bool = + Stdlib.List.forAll(list, fn) + +// Convert list to display string representation: "[elem1, elem2, ...]" +// Note: Generic version disabled due to function reference bug +// def Stdlib.List.toDisplayString(list: List, elemToString: (a) -> String) : String = +// let strs = Stdlib.List.map(list, elemToString) in +// "[" ++ Stdlib.String.join(strs, ", ") ++ "]" + +// Type-specific toDisplayString implementations (workaround for function reference bug) + +// Helper to build string list from Int64 list +def Stdlib.List.__int64sToStrings(list: List, acc: List) : List = + if Stdlib.__FingerTree.isEmpty(list) then acc + else + match Stdlib.__FingerTree.head(list) with + | None -> acc + | Some(h) -> + let s = Stdlib.Int64.toString(h) in + let newAcc = Stdlib.__FingerTree.pushBack(acc, s) in + Stdlib.List.__int64sToStrings(Stdlib.__FingerTree.tail(list), newAcc) + +def Stdlib.List.toDisplayString_i64(list: List) : String = + let strs = Stdlib.List.__int64sToStrings(list, Stdlib.__FingerTree.empty()) in + "[" ++ Stdlib.String.join(strs, ", ") ++ "]" + +// Helper to build string list from String list (with double quotes for display) +def Stdlib.List.__stringsToStrings(list: List, acc: List) : List = + if Stdlib.__FingerTree.isEmpty(list) then acc + else + match Stdlib.__FingerTree.head(list) with + | None -> acc + | Some(h) -> + let quoted = "\"" ++ h ++ "\"" in + let newAcc = Stdlib.__FingerTree.pushBack(acc, quoted) in + Stdlib.List.__stringsToStrings(Stdlib.__FingerTree.tail(list), newAcc) + +def Stdlib.List.toDisplayString_str(list: List) : String = + let strs = Stdlib.List.__stringsToStrings(list, Stdlib.__FingerTree.empty()) in + "[" ++ Stdlib.String.join(strs, ", ") ++ "]" + +// Helper to build string list from Bool list +def Stdlib.List.__boolsToStrings(list: List, acc: List) : List = + if Stdlib.__FingerTree.isEmpty(list) then acc + else + match Stdlib.__FingerTree.head(list) with + | None -> acc + | Some(h) -> + let s = Stdlib.Bool.toString(h) in + let newAcc = Stdlib.__FingerTree.pushBack(acc, s) in + Stdlib.List.__boolsToStrings(Stdlib.__FingerTree.tail(list), newAcc) + +def Stdlib.List.toDisplayString_bool(list: List) : String = + let strs = Stdlib.List.__boolsToStrings(list, Stdlib.__FingerTree.empty()) in + "[" ++ Stdlib.String.join(strs, ", ") ++ "]" diff --git a/backend/src/LibCompiler/stdlib/Math.dark b/backend/src/LibCompiler/stdlib/Math.dark new file mode 100644 index 0000000000..73af875865 --- /dev/null +++ b/backend/src/LibCompiler/stdlib/Math.dark @@ -0,0 +1,52 @@ +// Math.dark - Stdlib.Math definitions +// +// Split from stdlib.dark for modular stdlib loading. + +// Stdlib.Math - Mathematical operations +// ============================================================================= + +// Pi constant (approximation to 15 decimal places) +// 3.141592653589793 +def Stdlib.Math.pi() : Float = 3.141592653589793 + +// Euler's number e (approximation to 15 decimal places) +// 2.718281828459045 +def Stdlib.Math.e() : Float = 2.718281828459045 + +// Absolute value of a float +def Stdlib.Math.abs(x: Float) : Float = + Float.abs(x) + +// Square root (delegating to existing Float.sqrt) +def Stdlib.Math.sqrt(x: Float) : Float = + Float.sqrt(x) + +// Convert float to integer, truncating toward zero +def Stdlib.Math.truncate(x: Float) : Int64 = + Float.toInt(x) + +// Floor: largest integer less than or equal to x +// Note: Float.toInt truncates toward zero, so we need to adjust for negative numbers +def Stdlib.Math.floor(x: Float) : Int64 = + let truncated = Float.toInt(x) in + let floatTruncated = Float.abs(x) in // placeholder - we don't have Int64.toFloat + truncated // Simplified: just truncate for now + +// Ceiling: smallest integer greater than or equal to x +def Stdlib.Math.ceiling(x: Float) : Int64 = + let truncated = Float.toInt(x) in + truncated // Simplified: just truncate for now + +// Round to nearest integer +def Stdlib.Math.round(x: Float) : Int64 = + Float.toInt(x) // Simplified: just truncate for now + +// NOTE: Float comparison and arithmetic operators are not fully implemented yet. +// The following functions require compiler support for float operations: +// - Math.max, Math.min, Math.clamp (need float comparison) +// - Math.pow (needs float multiplication) +// - Math.isNegative (needs float comparison) +// - Trigonometric functions (sin, cos, tan) require intrinsics + + +// ============================================================================= diff --git a/backend/src/LibCompiler/stdlib/Option.dark b/backend/src/LibCompiler/stdlib/Option.dark new file mode 100644 index 0000000000..c3dfd79ed7 --- /dev/null +++ b/backend/src/LibCompiler/stdlib/Option.dark @@ -0,0 +1,43 @@ +// Option.dark - Stdlib.Option definitions +// +// Split from stdlib.dark for modular stdlib loading. + +// Stdlib.Option - Optional values +type Stdlib.Option.Option = Some of t | None + +// Check if option has a value +def Stdlib.Option.isSome(opt: Stdlib.Option.Option) : Bool = + match opt with + | Some(_) -> true + | None -> false + +// Check if option is empty +def Stdlib.Option.isNone(opt: Stdlib.Option.Option) : Bool = + match opt with + | Some(_) -> false + | None -> true + +// Get the value or return a default +def Stdlib.Option.withDefault(opt: Stdlib.Option.Option, default: t) : t = + match opt with + | Some(v) -> v + | None -> default + +// Transform the value with a function if present +def Stdlib.Option.map(opt: Stdlib.Option.Option, fn: (t) -> u) : Stdlib.Option.Option = + match opt with + | Some(v) -> Some(fn(v)) + | None -> None + +// Chain Option computations +def Stdlib.Option.andThen(opt: Stdlib.Option.Option, fn: (t) -> Stdlib.Option.Option) : Stdlib.Option.Option = + match opt with + | Some(v) -> fn(v) + | None -> None + +// Convert Option to a single-element or empty list +def Stdlib.Option.toList(opt: Stdlib.Option.Option) : List = + match opt with + | Some(v) -> [v] + | None -> [] + diff --git a/backend/src/LibCompiler/stdlib/Path.dark b/backend/src/LibCompiler/stdlib/Path.dark new file mode 100644 index 0000000000..d164f6c8b0 --- /dev/null +++ b/backend/src/LibCompiler/stdlib/Path.dark @@ -0,0 +1,14 @@ +// Path.dark - Stdlib.Path definitions +// +// Split from stdlib.dark for modular stdlib loading. + +// Stdlib.Path - Path operations + +// Combine two path segments +def Stdlib.Path.combine(a: String, b: String) : String = a ++ "/" ++ b + +// Get system temp directory (constant-folded at compile time) +// This is an intrinsic that returns "/tmp" on both macOS and Linux +// Note: The actual implementation is in the compiler, this is just type info +def Stdlib.Path.tempDir() : String = "/tmp" + diff --git a/backend/src/LibCompiler/stdlib/Platform.dark b/backend/src/LibCompiler/stdlib/Platform.dark new file mode 100644 index 0000000000..5a33919b82 --- /dev/null +++ b/backend/src/LibCompiler/stdlib/Platform.dark @@ -0,0 +1,12 @@ +// Platform.dark - Stdlib.Platform definitions +// +// Split from stdlib.dark for modular stdlib loading. + +// Stdlib.Platform - Platform detection (constant-folded at compile time) + +// Check if running on macOS +def Stdlib.Platform.isMacOS() : Bool = false + +// Check if running on Linux +def Stdlib.Platform.isLinux() : Bool = false + diff --git a/backend/src/LibCompiler/stdlib/Result.dark b/backend/src/LibCompiler/stdlib/Result.dark new file mode 100644 index 0000000000..105f000b1e --- /dev/null +++ b/backend/src/LibCompiler/stdlib/Result.dark @@ -0,0 +1,43 @@ +// Result.dark - Stdlib.Result definitions +// +// Split from stdlib.dark for modular stdlib loading. + +// Stdlib.Result - Result type for error handling +type Stdlib.Result.Result = Ok of t | Error of e + +// Check if result is Ok +def Stdlib.Result.isOk(result: Stdlib.Result.Result) : Bool = + match result with + | Ok(_) -> true + | Error(_) -> false + +// Check if result is Error +def Stdlib.Result.isError(result: Stdlib.Result.Result) : Bool = + match result with + | Ok(_) -> false + | Error(_) -> true + +// Get the Ok value or return a default +def Stdlib.Result.withDefault(result: Stdlib.Result.Result, default: t) : t = + match result with + | Ok(v) -> v + | Error(_) -> default + +// Transform the Ok value with a function +def Stdlib.Result.map(result: Stdlib.Result.Result, fn: (t) -> u) : Stdlib.Result.Result = + match result with + | Ok(v) -> Ok(fn(v)) + | Error(err) -> Error(err) + +// Transform the Error value with a function +def Stdlib.Result.mapError(fn: (e) -> f, result: Stdlib.Result.Result) : Stdlib.Result.Result = + match result with + | Ok(v) -> Ok(v) + | Error(err) -> Error(fn(err)) + +// Chain Result computations +def Stdlib.Result.andThen(result: Stdlib.Result.Result, fn: (t) -> Stdlib.Result.Result) : Stdlib.Result.Result = + match result with + | Ok(v) -> fn(v) + | Error(err) -> Error(err) + diff --git a/backend/src/LibCompiler/stdlib/String.dark b/backend/src/LibCompiler/stdlib/String.dark new file mode 100644 index 0000000000..6a05014337 --- /dev/null +++ b/backend/src/LibCompiler/stdlib/String.dark @@ -0,0 +1,542 @@ +// String.dark - Stdlib.String definitions +// +// Split from stdlib.dark for modular stdlib loading. + +// Stdlib.String - String operations + +// Newline constant (nullary function) +def Stdlib.String.newline() : String = "\n" + +// Append two strings +def Stdlib.String.append(s1: String, s2: String) : String = s1 ++ s2 + +// Prepend first string to second +def Stdlib.String.prepend(s2: String, s1: String) : String = s1 ++ s2 + +// Get the length of a string in bytes +// String format: [len:8 bytes][data:N bytes] +def Stdlib.String.length(s: String) : Int64 = + __raw_get(__int64_to_rawptr(__string_to_int64(s)), 0) + +// Check if string is empty +def Stdlib.String.isEmpty(s: String) : Bool = + Stdlib.String.length(s) == 0 + +// Get the byte value at a given index (0-based) +// Returns the byte as an Int64 (0-255) +// String data starts at offset 8 (after the length field) +def Stdlib.String.getByteAt(s: String, index: Int64) : Int64 = + __raw_get_byte(__int64_to_rawptr(__string_to_int64(s)), index + 8) + +// Check if a byte is an ASCII lowercase letter (a-z) +def Stdlib.String.__isLowercase(byte: Int64) : Bool = + byte >= 97 && byte <= 122 + +// Check if a byte is an ASCII uppercase letter (A-Z) +def Stdlib.String.__isUppercase(byte: Int64) : Bool = + byte >= 65 && byte <= 90 + +// Internal: Compare n bytes starting at positions in two strings +// Returns true if all bytes match +def Stdlib.String.__compareBytes(s1: String, start1: Int64, s2: String, start2: Int64, count: Int64) : Bool = + if count <= 0 then + true + else + let b1 = Stdlib.String.getByteAt(s1, start1) in + let b2 = Stdlib.String.getByteAt(s2, start2) in + if b1 != b2 then + false + else + Stdlib.String.__compareBytes(s1, start1 + 1, s2, start2 + 1, count - 1) + +// Check if string starts with prefix +def Stdlib.String.startsWith(s: String, prefix: String) : Bool = + let sLen = Stdlib.String.length(s) in + let prefixLen = Stdlib.String.length(prefix) in + if prefixLen > sLen then + false + else + Stdlib.String.__compareBytes(s, 0, prefix, 0, prefixLen) + +// Check if string ends with suffix +def Stdlib.String.endsWith(s: String, suffix: String) : Bool = + let sLen = Stdlib.String.length(s) in + let suffixLen = Stdlib.String.length(suffix) in + if suffixLen > sLen then + false + else + Stdlib.String.__compareBytes(s, sLen - suffixLen, suffix, 0, suffixLen) + +// Internal: Find substring starting at offset, returns None if not found +def Stdlib.String.__findFrom(s: String, search: String, offset: Int64) : Stdlib.Option.Option = + let sLen = Stdlib.String.length(s) in + let searchLen = Stdlib.String.length(search) in + if searchLen == 0 then + Some(offset) // Empty string is always found at current position + else if offset + searchLen > sLen then + None // Not enough characters left + else if Stdlib.String.__compareBytes(s, offset, search, 0, searchLen) then + Some(offset) // Found match at this position + else + Stdlib.String.__findFrom(s, search, offset + 1) + +// Find position of first occurrence of search string, returns None if not found +def Stdlib.String.indexOf(s: String, search: String) : Stdlib.Option.Option = + Stdlib.String.__findFrom(s, search, 0) + +// Check if string contains substring +def Stdlib.String.contains(s: String, search: String) : Bool = + Stdlib.Option.isSome(Stdlib.String.indexOf(s, search)) + +// Internal: Copy n bytes from source string to destination raw pointer +def Stdlib.String.__copyBytesToPtr(src: String, srcStart: Int64, dest: RawPtr, destStart: Int64, count: Int64) : Unit = + if count <= 0 then + () + else + let byte = Stdlib.String.getByteAt(src, srcStart) in + let _ = __raw_set_byte(dest, destStart, byte) in + Stdlib.String.__copyBytesToPtr(src, srcStart + 1, dest, destStart + 1, count - 1) + +// Extract substring from start index to end index (exclusive) +// String format: [length:8 bytes][data:N bytes][refcount:8 bytes] +def Stdlib.String.slice(s: String, start: Int64, end_: Int64) : String = + let sLen = Stdlib.String.length(s) in + // Clamp start to valid range + let actualStart = if start < 0 then 0 else if start > sLen then sLen else start in + // Clamp end to valid range + let actualEnd = if end_ < actualStart then actualStart else if end_ > sLen then sLen else end_ in + let actualLen = actualEnd - actualStart in + if actualLen == 0 then + "" + else + // Allocate: 8 (length) + actualLen (data) + 8 (refcount) = 16 + actualLen + let totalSize = 16 + actualLen in + let ptr = __raw_alloc(totalSize) in + // Write length at offset 0 + let _ = __raw_set(ptr, 0, actualLen) in + // Copy bytes from source (offset 8 + actualStart) to dest (offset 8) + let _ = Stdlib.String.__copyBytesToPtr(s, actualStart, ptr, 8, actualLen) in + // Write refcount = 1 at offset (8 + actualLen) + let _ = __raw_set(ptr, 8 + actualLen, 1) in + // Convert raw pointer to string + __int64_to_string(__rawptr_to_int64(ptr)) + +// Get substring from start to end (excluding end) - same as slice +def Stdlib.String.substring(s: String, start: Int64, end_: Int64) : String = + Stdlib.String.slice(s, start, end_) + +// Get first n characters +def Stdlib.String.take(s: String, n: Int64) : String = + Stdlib.String.slice(s, 0, n) + +// Drop first n characters +def Stdlib.String.drop(s: String, n: Int64) : String = + let sLen = Stdlib.String.length(s) in + Stdlib.String.slice(s, n, sLen) + +// ============================================================================= +// UTF-8 Decoding (for Unicode support) +// ============================================================================= + +// Decode a single UTF-8 codepoint starting at byteIndex +// Returns (codepoint, bytesConsumed) tuple +// UTF-8 encoding: +// - 1 byte: 0xxxxxxx (ASCII, 0-127) +// - 2 bytes: 110xxxxx 10xxxxxx (128-2047) +// - 3 bytes: 1110xxxx 10xxxxxx 10xxxxxx (2048-65535) +// - 4 bytes: 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx (65536-1114111) +def Stdlib.String.__decodeUtf8At(s: String, byteIndex: Int64) : (Int64, Int64) = + let b0 = Stdlib.String.getByteAt(s, byteIndex) in + if b0 < 128 then + // 1-byte (ASCII): 0xxxxxxx + (b0, 1) + else if b0 < 224 then + // 2-byte: 110xxxxx 10xxxxxx + let b1 = Stdlib.String.getByteAt(s, byteIndex + 1) in + let cp = ((b0 & 31) << 6) ^ (b1 & 63) in + (cp, 2) + else if b0 < 240 then + // 3-byte: 1110xxxx 10xxxxxx 10xxxxxx + let b1 = Stdlib.String.getByteAt(s, byteIndex + 1) in + let b2 = Stdlib.String.getByteAt(s, byteIndex + 2) in + let cp = ((b0 & 15) << 12) ^ ((b1 & 63) << 6) ^ (b2 & 63) in + (cp, 3) + else + // 4-byte: 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx + let b1 = Stdlib.String.getByteAt(s, byteIndex + 1) in + let b2 = Stdlib.String.getByteAt(s, byteIndex + 2) in + let b3 = Stdlib.String.getByteAt(s, byteIndex + 3) in + let cp = ((b0 & 7) << 18) ^ ((b1 & 63) << 12) ^ ((b2 & 63) << 6) ^ (b3 & 63) in + (cp, 4) + +// Convert a string to a list of Unicode codepoints +def Stdlib.String.toCodepoints(s: String) : List = + Stdlib.String.__toCodepointsHelper(s, 0, Stdlib.String.length(s), []) + +// Helper: recursively decode codepoints +def Stdlib.String.__toCodepointsHelper(s: String, byteIndex: Int64, byteLen: Int64, acc: List) : List = + if byteIndex >= byteLen then + Stdlib.List.reverse(acc) + else + let result = Stdlib.String.__decodeUtf8At(s, byteIndex) in + let cp = Stdlib.Tuple2.first(result) in + let consumed = Stdlib.Tuple2.second(result) in + Stdlib.String.__toCodepointsHelper(s, byteIndex + consumed, byteLen, [cp, ...acc]) + +// Get the number of codepoints in a string (not bytes) +def Stdlib.String.codepointLength(s: String) : Int64 = + Stdlib.List.length(Stdlib.String.toCodepoints(s)) + +// ============================================================================= +// UTF-8 Encoding (codepoints to string) +// ============================================================================= + +// Calculate UTF-8 byte length for a single codepoint +def Stdlib.String.__utf8ByteLen(cp: Int64) : Int64 = + if cp < 128 then 1 + else if cp < 2048 then 2 + else if cp < 65536 then 3 + else 4 + +// Calculate total UTF-8 byte length for a list of codepoints +def Stdlib.String.__totalUtf8Len(cps: List) : Int64 = + Stdlib.List.fold(cps, 0, (acc: Int64, cp: Int64) => acc + Stdlib.String.__utf8ByteLen(cp)) + +// Encode a single codepoint to UTF-8 bytes at given offset, return new offset +def Stdlib.String.__encodeUtf8At(ptr: RawPtr, offset: Int64, cp: Int64) : Int64 = + if cp < 128 then + // 1-byte: 0xxxxxxx + let _ = __raw_set_byte(ptr, offset, cp) in + offset + 1 + else if cp < 2048 then + // 2-byte: 110xxxxx 10xxxxxx + let b0 = 192 ^ (cp >> 6) in + let b1 = 128 ^ (cp & 63) in + let _ = __raw_set_byte(ptr, offset, b0) in + let _ = __raw_set_byte(ptr, offset + 1, b1) in + offset + 2 + else if cp < 65536 then + // 3-byte: 1110xxxx 10xxxxxx 10xxxxxx + let b0 = 224 ^ (cp >> 12) in + let b1 = 128 ^ ((cp >> 6) & 63) in + let b2 = 128 ^ (cp & 63) in + let _ = __raw_set_byte(ptr, offset, b0) in + let _ = __raw_set_byte(ptr, offset + 1, b1) in + let _ = __raw_set_byte(ptr, offset + 2, b2) in + offset + 3 + else + // 4-byte: 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx + let b0 = 240 ^ (cp >> 18) in + let b1 = 128 ^ ((cp >> 12) & 63) in + let b2 = 128 ^ ((cp >> 6) & 63) in + let b3 = 128 ^ (cp & 63) in + let _ = __raw_set_byte(ptr, offset, b0) in + let _ = __raw_set_byte(ptr, offset + 1, b1) in + let _ = __raw_set_byte(ptr, offset + 2, b2) in + let _ = __raw_set_byte(ptr, offset + 3, b3) in + offset + 4 + +// Encode all codepoints starting at offset +def Stdlib.String.__encodeCodepointsAt(ptr: RawPtr, offset: Int64, cps: List) : Int64 = + match cps with + | [] -> offset + | [cp, ...rest] -> + let newOffset = Stdlib.String.__encodeUtf8At(ptr, offset, cp) in + Stdlib.String.__encodeCodepointsAt(ptr, newOffset, rest) + +// Build a string from a list of Unicode codepoints +// String format: [length:8 bytes][data:N bytes][refcount:8 bytes] +def Stdlib.String.fromCodepoints(cps: List) : String = + let byteLen = Stdlib.String.__totalUtf8Len(cps) in + if byteLen == 0 then + "" + else + // Allocate: 8 (length) + byteLen (data) + 8 (refcount) + let totalSize = 16 + byteLen in + let ptr = __raw_alloc(totalSize) in + // Write length at offset 0 + let _ = __raw_set(ptr, 0, byteLen) in + // Encode codepoints starting at offset 8 + let _ = Stdlib.String.__encodeCodepointsAt(ptr, 8, cps) in + // Write refcount = 1 at end + let _ = __raw_set(ptr, 8 + byteLen, 1) in + __int64_to_string(__rawptr_to_int64(ptr)) + +// ============================================================================= +// Case Mapping Functions (ASCII fast path, with Unicode table fallback) +// ============================================================================= + +// Map ASCII lowercase to uppercase (a-z -> A-Z) +def Stdlib.String.__asciiToUpper(cp: Int64) : Int64 = + if cp >= 97 && cp <= 122 then cp - 32 else cp + +// Map ASCII uppercase to lowercase (A-Z -> a-z) +def Stdlib.String.__asciiToLower(cp: Int64) : Int64 = + if cp >= 65 && cp <= 90 then cp + 32 else cp + +// Helper: map codepoints to uppercase ASCII (simple version) +def Stdlib.String.__mapUpperAscii(cps: List, acc: List) : List = + match cps with + | [] -> Stdlib.List.reverse(acc) + | [cp, ...rest] -> + let upper = Stdlib.String.__asciiToUpper(cp) in + Stdlib.String.__mapUpperAscii(rest, [upper, ...acc]) + +// Helper: map codepoints to lowercase ASCII (simple version) +def Stdlib.String.__mapLowerAscii(cps: List, acc: List) : List = + match cps with + | [] -> Stdlib.List.reverse(acc) + | [cp, ...rest] -> + let lower = Stdlib.String.__asciiToLower(cp) in + Stdlib.String.__mapLowerAscii(rest, [lower, ...acc]) + +// Convert string to uppercase (ASCII only for now) +def Stdlib.String.toUpperCase(s: String) : String = + let codepoints = Stdlib.String.toCodepoints(s) in + let upper = Stdlib.String.__mapUpperAscii(codepoints, []) in + Stdlib.String.fromCodepoints(upper) + +// Convert string to lowercase (ASCII only for now) +def Stdlib.String.toLowerCase(s: String) : String = + let codepoints = Stdlib.String.toCodepoints(s) in + let lower = Stdlib.String.__mapLowerAscii(codepoints, []) in + Stdlib.String.fromCodepoints(lower) + +// ============================================================================= +// Grapheme Cluster Segmentation (simplified UAX #29) +// ============================================================================= +// Grapheme break categories (simplified): +// - CR (13), LF (10): newline handling +// - ZWJ (8205): zero-width joiner for emoji sequences +// - Extend: combining marks, variation selectors, skin tone modifiers + +// Check if codepoint is a combining/extending character +def Stdlib.String.__isExtend(cp: Int64) : Bool = + // Combining Diacritical Marks (0300-036F) + (cp >= 768 && cp <= 879) || + // Variation Selectors (FE00-FE0F) + (cp >= 65024 && cp <= 65039) || + // Combining Diacritical Marks Extended (1AB0-1AFF) + (cp >= 6832 && cp <= 6911) || + // Combining Half Marks (FE20-FE2F) + (cp >= 65056 && cp <= 65071) || + // Emoji Fitzpatrick modifiers (skin tones) (1F3FB-1F3FF) + (cp >= 127995 && cp <= 127999) || + // Emoji component (hair styles, etc) - simplified range + (cp >= 127988 && cp <= 127988) + +// Check if codepoint is ZWJ (Zero Width Joiner) +def Stdlib.String.__isZWJ(cp: Int64) : Bool = cp == 8205 + +// Segment codepoints into grapheme clusters +// Returns list of codepoint lists (each inner list is one grapheme) +def Stdlib.String.__segmentGraphemes(cps: List, current: List, result: List>) : List> = + match cps with + | [] -> + // End of input - add current grapheme if non-empty + if Stdlib.List.isEmpty(current) then + Stdlib.List.reverse>(result) + else + Stdlib.List.reverse>([Stdlib.List.reverse(current), ...result]) + | [cp, ...rest] -> + if Stdlib.List.isEmpty(current) then + // Start new grapheme + Stdlib.String.__segmentGraphemes(rest, [cp], result) + else if Stdlib.String.__isExtend(cp) || Stdlib.String.__isZWJ(cp) then + // Extend current grapheme + Stdlib.String.__segmentGraphemes(rest, [cp, ...current], result) + else if cp == 10 then + // LF - check if preceded by CR + match current with + | [13] -> + // CR + LF = single grapheme + Stdlib.String.__segmentGraphemes(rest, [], [Stdlib.List.reverse([cp, ...current]), ...result]) + | _ -> + // LF alone - end current, LF is its own grapheme + Stdlib.String.__segmentGraphemes(rest, [], [[cp], Stdlib.List.reverse(current), ...result]) + else + // New base character - end current grapheme, start new one + Stdlib.String.__segmentGraphemes(rest, [cp], [Stdlib.List.reverse(current), ...result]) + +// Convert a list of codepoints to a string +def Stdlib.String.__codepointsToString(cps: List) : String = + Stdlib.String.fromCodepoints(cps) + +// Convert string to list of grapheme clusters (each as a string) +def Stdlib.String.toGraphemes(s: String) : List = + let cps = Stdlib.String.toCodepoints(s) in + let segments = Stdlib.String.__segmentGraphemes(cps, [], []) in + Stdlib.List.map, String>(segments, Stdlib.String.__codepointsToString) + +// Get number of grapheme clusters in a string +def Stdlib.String.graphemeLength(s: String) : Int64 = + Stdlib.List.length(Stdlib.String.toGraphemes(s)) + +// ============================================================================= +// High-Level String API +// ============================================================================= + +// Repeat a string n times +def Stdlib.String.repeat(s: String, n: Int64) : String = + if n <= 0 then "" + else if n == 1 then s + else s ++ Stdlib.String.repeat(s, n - 1) + +// Join a list of strings with a separator +def Stdlib.String.join(strs: List, sep: String) : String = + match strs with + | [] -> "" + | [only] -> only + | [first, ...rest] -> first ++ sep ++ Stdlib.String.join(rest, sep) + +// Check if byte is ASCII whitespace (space, tab, newline, carriage return) +def Stdlib.String.__isWhitespace(b: Int64) : Bool = + b == 32 || b == 9 || b == 10 || b == 13 + +// Trim leading whitespace +def Stdlib.String.trimStart(s: String) : String = + let len = Stdlib.String.length(s) in + Stdlib.String.__trimStartHelper(s, 0, len) + +def Stdlib.String.__trimStartHelper(s: String, i: Int64, len: Int64) : String = + if i >= len then "" + else if Stdlib.String.__isWhitespace(Stdlib.String.getByteAt(s, i)) then + Stdlib.String.__trimStartHelper(s, i + 1, len) + else + Stdlib.String.drop(s, i) + +// Trim trailing whitespace +def Stdlib.String.trimEnd(s: String) : String = + let len = Stdlib.String.length(s) in + Stdlib.String.__trimEndHelper(s, len - 1) + +def Stdlib.String.__trimEndHelper(s: String, i: Int64) : String = + if i < 0 then "" + else if Stdlib.String.__isWhitespace(Stdlib.String.getByteAt(s, i)) then + Stdlib.String.__trimEndHelper(s, i - 1) + else + Stdlib.String.take(s, i + 1) + +// Trim both leading and trailing whitespace +def Stdlib.String.trim(s: String) : String = + Stdlib.String.trimEnd(Stdlib.String.trimStart(s)) + +// Split string by delimiter (simple byte-based) +// Empty delimiter splits into individual bytes +def Stdlib.String.split(s: String, delim: String) : List = + if Stdlib.String.isEmpty(delim) then + // Empty delimiter: split into individual bytes + Stdlib.String.__splitIntoBytes(s, 0, []) + else + Stdlib.String.__splitHelper(s, delim, 0, []) + +def Stdlib.String.__splitIntoBytes(s: String, idx: Int64, acc: List) : List = + if idx >= Stdlib.String.length(s) then + Stdlib.List.reverse(acc) + else + let byte = Stdlib.String.substring(s, idx, idx + 1) in + Stdlib.String.__splitIntoBytes(s, idx + 1, [byte, ...acc]) + +def Stdlib.String.__splitHelper(s: String, delim: String, start: Int64, acc: List) : List = + let sLen = Stdlib.String.length(s) in + let delimLen = Stdlib.String.length(delim) in + if start > sLen then + Stdlib.List.reverse(acc) + else + match Stdlib.String.__findFrom(s, delim, start) with + | None -> + // No more delimiters - add rest of string + Stdlib.List.reverse([Stdlib.String.drop(s, start), ...acc]) + | Some(idx) -> + // Found delimiter - add segment and continue + let segment = Stdlib.String.substring(s, start, idx) in + Stdlib.String.__splitHelper(s, delim, idx + delimLen, [segment, ...acc]) + +// Replace all occurrences of old with new +// Empty old string inserts new at every position (including boundaries) +def Stdlib.String.replace(s: String, old: String, new: String) : String = + if Stdlib.String.isEmpty(old) then + // Insert new at every position: before each char and after last + Stdlib.String.__replaceEmpty(s, new, 0, new) + else + Stdlib.String.join(Stdlib.String.split(s, old), new) + +def Stdlib.String.__replaceEmpty(s: String, new: String, idx: Int64, acc: String) : String = + if idx >= Stdlib.String.length(s) then + acc + else + let byte = Stdlib.String.substring(s, idx, idx + 1) in + Stdlib.String.__replaceEmpty(s, new, idx + 1, acc ++ byte ++ new) + +// Reverse a string (byte-based, works for ASCII) +def Stdlib.String.reverse(s: String) : String = + let cps = Stdlib.String.toCodepoints(s) in + Stdlib.String.fromCodepoints(Stdlib.List.reverse(cps)) + +// Check if string equals another (byte comparison) +def Stdlib.String.equals(s1: String, s2: String) : Bool = + let len1 = Stdlib.String.length(s1) in + let len2 = Stdlib.String.length(s2) in + if len1 != len2 then false + else Stdlib.String.__compareBytes(s1, 0, s2, 0, len1) + +// Get first n bytes (alias for take) +def Stdlib.String.first(s: String, n: Int64) : String = + Stdlib.String.take(s, n) + +// Get last n bytes +def Stdlib.String.last(s: String, n: Int64) : String = + let len = Stdlib.String.length(s) in + if n <= 0 then "" + else if n >= len then s + else Stdlib.String.drop(s, len - n) + +// Drop first n bytes (alias for drop) +def Stdlib.String.dropFirst(s: String, n: Int64) : String = + Stdlib.String.drop(s, n) + +// Drop last n bytes +def Stdlib.String.dropLast(s: String, n: Int64) : String = + let len = Stdlib.String.length(s) in + if n <= 0 then s + else if n >= len then "" + else Stdlib.String.take(s, len - n) + +// Get first Unicode codepoint as Option +def Stdlib.String.head(s: String) : Stdlib.Option.Option = + let cps = Stdlib.String.toCodepoints(s) in + match cps with + | [] -> None + | [cp, ...rest] -> Some(Stdlib.String.fromCodepoints([cp])) + +// Pad string on the left to reach target length +// Uses byte-based length for simplicity +def Stdlib.String.padStart(s: String, targetLen: Int64, padChar: String) : String = + let len = Stdlib.String.length(s) in + let padLen = Stdlib.String.length(padChar) in + if len >= targetLen then s + else if padLen == 0 then s + else + let needed = targetLen - len in + let numPads = needed / padLen in + let remainder = needed % padLen in + let fullPad = Stdlib.String.repeat(padChar, numPads) in + let partialPad = Stdlib.String.take(padChar, remainder) in + fullPad ++ partialPad ++ s + +// Pad string on the right to reach target length +def Stdlib.String.padEnd(s: String, targetLen: Int64, padChar: String) : String = + let len = Stdlib.String.length(s) in + let padLen = Stdlib.String.length(padChar) in + if len >= targetLen then s + else if padLen == 0 then s + else + let needed = targetLen - len in + let numPads = needed / padLen in + let remainder = needed % padLen in + let fullPad = Stdlib.String.repeat(padChar, numPads) in + let partialPad = Stdlib.String.take(padChar, remainder) in + s ++ fullPad ++ partialPad + + +// ============================================================================= diff --git a/backend/src/LibCompiler/stdlib/Tuple2.dark b/backend/src/LibCompiler/stdlib/Tuple2.dark new file mode 100644 index 0000000000..93d0d7aaf5 --- /dev/null +++ b/backend/src/LibCompiler/stdlib/Tuple2.dark @@ -0,0 +1,23 @@ +// Tuple2.dark - Stdlib.Tuple2 definitions +// +// Split from stdlib.dark for modular stdlib loading. + +// Stdlib.Tuple2 - 2-tuple operations + +def Stdlib.Tuple2.create(first: a, second: b) : (a, b) = (first, second) + +def Stdlib.Tuple2.first(t: (a, b)) : a = match t with | (x, y) -> x + +def Stdlib.Tuple2.second(t: (a, b)) : b = match t with | (x, y) -> y + +def Stdlib.Tuple2.swap(t: (a, b)) : (b, a) = match t with | (x, y) -> (y, x) + +def Stdlib.Tuple2.mapFirst(fn: (a) -> c, t: (a, b)) : (c, b) = + match t with | (x, y) -> (fn(x), y) + +def Stdlib.Tuple2.mapSecond(fn: (b) -> c, t: (a, b)) : (a, c) = + match t with | (x, y) -> (x, fn(y)) + +def Stdlib.Tuple2.mapBoth(fnFirst: (a) -> c, fnSecond: (b) -> d, t: (a, b)) : (c, d) = + match t with | (x, y) -> (fnFirst(x), fnSecond(y)) + diff --git a/backend/src/LibCompiler/stdlib/Tuple3.dark b/backend/src/LibCompiler/stdlib/Tuple3.dark new file mode 100644 index 0000000000..4030caa938 --- /dev/null +++ b/backend/src/LibCompiler/stdlib/Tuple3.dark @@ -0,0 +1,26 @@ +// Tuple3.dark - Stdlib.Tuple3 definitions +// +// Split from stdlib.dark for modular stdlib loading. + +// Stdlib.Tuple3 - 3-tuple operations + +def Stdlib.Tuple3.create(first: a, second: b, third: c) : (a, b, c) = (first, second, third) + +def Stdlib.Tuple3.first(t: (a, b, c)) : a = match t with | (x, y, z) -> x + +def Stdlib.Tuple3.second(t: (a, b, c)) : b = match t with | (x, y, z) -> y + +def Stdlib.Tuple3.third(t: (a, b, c)) : c = match t with | (x, y, z) -> z + +def Stdlib.Tuple3.mapFirst(fn: (a) -> d, t: (a, b, c)) : (d, b, c) = + match t with | (x, y, z) -> (fn(x), y, z) + +def Stdlib.Tuple3.mapSecond(fn: (b) -> d, t: (a, b, c)) : (a, d, c) = + match t with | (x, y, z) -> (x, fn(y), z) + +def Stdlib.Tuple3.mapThird(fn: (c) -> d, t: (a, b, c)) : (a, b, d) = + match t with | (x, y, z) -> (x, y, fn(z)) + +def Stdlib.Tuple3.mapAllThree(fnFirst: (a) -> d, fnSecond: (b) -> e, fnThird: (c) -> f, t: (a, b, c)) : (d, e, f) = + match t with | (x, y, z) -> (fnFirst(x), fnSecond(y), fnThird(z)) + diff --git a/backend/src/LibCompiler/stdlib/UInt16.dark b/backend/src/LibCompiler/stdlib/UInt16.dark new file mode 100644 index 0000000000..578344615f --- /dev/null +++ b/backend/src/LibCompiler/stdlib/UInt16.dark @@ -0,0 +1,99 @@ +// UInt16.dark - Stdlib.UInt16 definitions +// +// Split from stdlib.dark for modular stdlib loading. + +// Stdlib.UInt16 - Integer operations + +def Stdlib.UInt16.add(a: UInt16, b: UInt16) : UInt16 = a + b + +def Stdlib.UInt16.sub(a: UInt16, b: UInt16) : UInt16 = a - b + +def Stdlib.UInt16.mul(a: UInt16, b: UInt16) : UInt16 = a * b + +def Stdlib.UInt16.div(a: UInt16, b: UInt16) : UInt16 = a / b + +def Stdlib.UInt16.max(a: UInt16, b: UInt16) : UInt16 = if a > b then a else b + +def Stdlib.UInt16.min(a: UInt16, b: UInt16) : UInt16 = if a < b then a else b + +def Stdlib.UInt16.mod(a: UInt16, b: UInt16) : UInt16 = a % b + +def Stdlib.UInt16.absoluteValue(a: UInt16) : UInt16 = a + +def Stdlib.UInt16.negate(a: UInt16) : UInt16 = 0us - a + +def Stdlib.UInt16.power(base: UInt16, exponent: UInt16) : UInt16 = + if exponent == 0us then 1us + else if exponent == 1us then base + else base * Stdlib.UInt16.power(base, exponent - 1us) + +def Stdlib.UInt16.clamp(value: UInt16, limitA: UInt16, limitB: UInt16) : UInt16 = + let lower = Stdlib.UInt16.min(limitA, limitB) in + let upper = Stdlib.UInt16.max(limitA, limitB) in + Stdlib.UInt16.max(lower, Stdlib.UInt16.min(upper, value)) + +def Stdlib.UInt16.greaterThan(a: UInt16, b: UInt16) : Bool = a > b + +def Stdlib.UInt16.greaterThanOrEqualTo(a: UInt16, b: UInt16) : Bool = a >= b + +def Stdlib.UInt16.lessThan(a: UInt16, b: UInt16) : Bool = a < b + +def Stdlib.UInt16.lessThanOrEqualTo(a: UInt16, b: UInt16) : Bool = a <= b + +// Bitwise operations +def Stdlib.UInt16.bitwiseAnd(a: UInt16, b: UInt16) : UInt16 = a & b + +def Stdlib.UInt16.bitwiseOr(a: UInt16, b: UInt16) : UInt16 = a ||| b + +def Stdlib.UInt16.bitwiseXor(a: UInt16, b: UInt16) : UInt16 = a ^ b + +def Stdlib.UInt16.shiftLeft(a: UInt16, shift: UInt16) : UInt16 = a << shift + +def Stdlib.UInt16.shiftRight(a: UInt16, shift: UInt16) : UInt16 = a >> shift + +def Stdlib.UInt16.bitwiseNot(a: UInt16) : UInt16 = ~~~a + +// Count number of set bits (population count) +// Uses parallel bit counting algorithm (SWAR) +def Stdlib.UInt16.popcount(x: UInt16) : UInt16 = + let mask1 = 21845us in + let mask2 = 13107us in + let mask3 = 3855us in + let mask4 = 31us in + let x = x - ((x >> 1us) & mask1) in + let x = (x & mask2) + ((x >> 2us) & mask2) in + let x = (x + (x >> 4us)) & mask3 in + let x = x + (x >> 8us) in + x & mask4 + +// Convert a single digit (0-9) to its string representation +def Stdlib.UInt16.__digitToString(n: UInt16) : String = + match n with + | 0us -> "0" + | 1us -> "1" + | 2us -> "2" + | 3us -> "3" + | 4us -> "4" + | 5us -> "5" + | 6us -> "6" + | 7us -> "7" + | 8us -> "8" + | 9us -> "9" + | _ -> "?" + +// Convert an integer to its string representation +def Stdlib.UInt16.toString(n: UInt16) : String = + if n < 10us then Stdlib.UInt16.__digitToString(n) + else Stdlib.UInt16.toString(n / 10us) ++ Stdlib.UInt16.__digitToString(n % 10us) + +// Check if integer is even +def Stdlib.UInt16.isEven(n: UInt16) : Bool = + (n % 2us) == 0us + +// Check if integer is odd +def Stdlib.UInt16.isOdd(n: UInt16) : Bool = + (n % 2us) != 0us + +// Sum all integers in a list +def Stdlib.UInt16.sum(list: List) : UInt16 = + Stdlib.List.fold(list, 0us, (acc: UInt16, x: UInt16) => acc + x) diff --git a/backend/src/LibCompiler/stdlib/UInt32.dark b/backend/src/LibCompiler/stdlib/UInt32.dark new file mode 100644 index 0000000000..8c6423f849 --- /dev/null +++ b/backend/src/LibCompiler/stdlib/UInt32.dark @@ -0,0 +1,100 @@ +// UInt32.dark - Stdlib.UInt32 definitions +// +// Split from stdlib.dark for modular stdlib loading. + +// Stdlib.UInt32 - Integer operations + +def Stdlib.UInt32.add(a: UInt32, b: UInt32) : UInt32 = a + b + +def Stdlib.UInt32.sub(a: UInt32, b: UInt32) : UInt32 = a - b + +def Stdlib.UInt32.mul(a: UInt32, b: UInt32) : UInt32 = a * b + +def Stdlib.UInt32.div(a: UInt32, b: UInt32) : UInt32 = a / b + +def Stdlib.UInt32.max(a: UInt32, b: UInt32) : UInt32 = if a > b then a else b + +def Stdlib.UInt32.min(a: UInt32, b: UInt32) : UInt32 = if a < b then a else b + +def Stdlib.UInt32.mod(a: UInt32, b: UInt32) : UInt32 = a % b + +def Stdlib.UInt32.absoluteValue(a: UInt32) : UInt32 = a + +def Stdlib.UInt32.negate(a: UInt32) : UInt32 = 0ul - a + +def Stdlib.UInt32.power(base: UInt32, exponent: UInt32) : UInt32 = + if exponent == 0ul then 1ul + else if exponent == 1ul then base + else base * Stdlib.UInt32.power(base, exponent - 1ul) + +def Stdlib.UInt32.clamp(value: UInt32, limitA: UInt32, limitB: UInt32) : UInt32 = + let lower = Stdlib.UInt32.min(limitA, limitB) in + let upper = Stdlib.UInt32.max(limitA, limitB) in + Stdlib.UInt32.max(lower, Stdlib.UInt32.min(upper, value)) + +def Stdlib.UInt32.greaterThan(a: UInt32, b: UInt32) : Bool = a > b + +def Stdlib.UInt32.greaterThanOrEqualTo(a: UInt32, b: UInt32) : Bool = a >= b + +def Stdlib.UInt32.lessThan(a: UInt32, b: UInt32) : Bool = a < b + +def Stdlib.UInt32.lessThanOrEqualTo(a: UInt32, b: UInt32) : Bool = a <= b + +// Bitwise operations +def Stdlib.UInt32.bitwiseAnd(a: UInt32, b: UInt32) : UInt32 = a & b + +def Stdlib.UInt32.bitwiseOr(a: UInt32, b: UInt32) : UInt32 = a ||| b + +def Stdlib.UInt32.bitwiseXor(a: UInt32, b: UInt32) : UInt32 = a ^ b + +def Stdlib.UInt32.shiftLeft(a: UInt32, shift: UInt32) : UInt32 = a << shift + +def Stdlib.UInt32.shiftRight(a: UInt32, shift: UInt32) : UInt32 = a >> shift + +def Stdlib.UInt32.bitwiseNot(a: UInt32) : UInt32 = ~~~a + +// Count number of set bits (population count) +// Uses parallel bit counting algorithm (SWAR) +def Stdlib.UInt32.popcount(x: UInt32) : UInt32 = + let mask1 = 1431655765ul in + let mask2 = 858993459ul in + let mask3 = 252645135ul in + let mask4 = 63ul in + let x = x - ((x >> 1ul) & mask1) in + let x = (x & mask2) + ((x >> 2ul) & mask2) in + let x = (x + (x >> 4ul)) & mask3 in + let x = x + (x >> 8ul) in + let x = x + (x >> 16ul) in + x & mask4 + +// Convert a single digit (0-9) to its string representation +def Stdlib.UInt32.__digitToString(n: UInt32) : String = + match n with + | 0ul -> "0" + | 1ul -> "1" + | 2ul -> "2" + | 3ul -> "3" + | 4ul -> "4" + | 5ul -> "5" + | 6ul -> "6" + | 7ul -> "7" + | 8ul -> "8" + | 9ul -> "9" + | _ -> "?" + +// Convert an integer to its string representation +def Stdlib.UInt32.toString(n: UInt32) : String = + if n < 10ul then Stdlib.UInt32.__digitToString(n) + else Stdlib.UInt32.toString(n / 10ul) ++ Stdlib.UInt32.__digitToString(n % 10ul) + +// Check if integer is even +def Stdlib.UInt32.isEven(n: UInt32) : Bool = + (n % 2ul) == 0ul + +// Check if integer is odd +def Stdlib.UInt32.isOdd(n: UInt32) : Bool = + (n % 2ul) != 0ul + +// Sum all integers in a list +def Stdlib.UInt32.sum(list: List) : UInt32 = + Stdlib.List.fold(list, 0ul, (acc: UInt32, x: UInt32) => acc + x) diff --git a/backend/src/LibCompiler/stdlib/UInt64.dark b/backend/src/LibCompiler/stdlib/UInt64.dark new file mode 100644 index 0000000000..b0785dded1 --- /dev/null +++ b/backend/src/LibCompiler/stdlib/UInt64.dark @@ -0,0 +1,98 @@ +// UInt64.dark - Stdlib.UInt64 definitions +// +// Split from stdlib.dark for modular stdlib loading. + +// Stdlib.UInt64 - Integer operations + +def Stdlib.UInt64.add(a: UInt64, b: UInt64) : UInt64 = a + b + +def Stdlib.UInt64.sub(a: UInt64, b: UInt64) : UInt64 = a - b + +def Stdlib.UInt64.mul(a: UInt64, b: UInt64) : UInt64 = a * b + +def Stdlib.UInt64.div(a: UInt64, b: UInt64) : UInt64 = a / b + +def Stdlib.UInt64.max(a: UInt64, b: UInt64) : UInt64 = if a > b then a else b + +def Stdlib.UInt64.min(a: UInt64, b: UInt64) : UInt64 = if a < b then a else b + +def Stdlib.UInt64.mod(a: UInt64, b: UInt64) : UInt64 = a % b + +def Stdlib.UInt64.absoluteValue(a: UInt64) : UInt64 = a + +def Stdlib.UInt64.negate(a: UInt64) : UInt64 = 0UL - a + +def Stdlib.UInt64.power(base: UInt64, exponent: UInt64) : UInt64 = + if exponent == 0UL then 1UL + else if exponent == 1UL then base + else base * Stdlib.UInt64.power(base, exponent - 1UL) + +def Stdlib.UInt64.clamp(value: UInt64, limitA: UInt64, limitB: UInt64) : UInt64 = + let lower = Stdlib.UInt64.min(limitA, limitB) in + let upper = Stdlib.UInt64.max(limitA, limitB) in + Stdlib.UInt64.max(lower, Stdlib.UInt64.min(upper, value)) + +def Stdlib.UInt64.greaterThan(a: UInt64, b: UInt64) : Bool = a > b + +def Stdlib.UInt64.greaterThanOrEqualTo(a: UInt64, b: UInt64) : Bool = a >= b + +def Stdlib.UInt64.lessThan(a: UInt64, b: UInt64) : Bool = a < b + +def Stdlib.UInt64.lessThanOrEqualTo(a: UInt64, b: UInt64) : Bool = a <= b + +// Bitwise operations +def Stdlib.UInt64.bitwiseAnd(a: UInt64, b: UInt64) : UInt64 = a & b + +def Stdlib.UInt64.bitwiseOr(a: UInt64, b: UInt64) : UInt64 = a ||| b + +def Stdlib.UInt64.bitwiseXor(a: UInt64, b: UInt64) : UInt64 = a ^ b + +def Stdlib.UInt64.shiftLeft(a: UInt64, shift: UInt64) : UInt64 = a << shift + +def Stdlib.UInt64.shiftRight(a: UInt64, shift: UInt64) : UInt64 = a >> shift + +def Stdlib.UInt64.bitwiseNot(a: UInt64) : UInt64 = ~~~a + +// Count number of set bits (population count) +// Uses parallel bit counting algorithm (SWAR) +def Stdlib.UInt64.popcount(x: UInt64) : UInt64 = + let mask1 = 6148914691236517205UL in + let mask2 = 3689348814741910323UL in + let mask3 = 1085102592571150095UL in + let mult = 72340172838076673UL in + let x = x - ((x >> 1UL) & mask1) in + let x = (x & mask2) + ((x >> 2UL) & mask2) in + let x = (x + (x >> 4UL)) & mask3 in + (x * mult) >> 56UL + +// Convert a single digit (0-9) to its string representation +def Stdlib.UInt64.__digitToString(n: UInt64) : String = + match n with + | 0UL -> "0" + | 1UL -> "1" + | 2UL -> "2" + | 3UL -> "3" + | 4UL -> "4" + | 5UL -> "5" + | 6UL -> "6" + | 7UL -> "7" + | 8UL -> "8" + | 9UL -> "9" + | _ -> "?" + +// Convert an integer to its string representation +def Stdlib.UInt64.toString(n: UInt64) : String = + if n < 10UL then Stdlib.UInt64.__digitToString(n) + else Stdlib.UInt64.toString(n / 10UL) ++ Stdlib.UInt64.__digitToString(n % 10UL) + +// Check if integer is even +def Stdlib.UInt64.isEven(n: UInt64) : Bool = + (n % 2UL) == 0UL + +// Check if integer is odd +def Stdlib.UInt64.isOdd(n: UInt64) : Bool = + (n % 2UL) != 0UL + +// Sum all integers in a list +def Stdlib.UInt64.sum(list: List) : UInt64 = + Stdlib.List.fold(list, 0UL, (acc: UInt64, x: UInt64) => acc + x) diff --git a/backend/src/LibCompiler/stdlib/UInt8.dark b/backend/src/LibCompiler/stdlib/UInt8.dark new file mode 100644 index 0000000000..430effeab6 --- /dev/null +++ b/backend/src/LibCompiler/stdlib/UInt8.dark @@ -0,0 +1,97 @@ +// UInt8.dark - Stdlib.UInt8 definitions +// +// Split from stdlib.dark for modular stdlib loading. + +// Stdlib.UInt8 - Integer operations + +def Stdlib.UInt8.add(a: UInt8, b: UInt8) : UInt8 = a + b + +def Stdlib.UInt8.sub(a: UInt8, b: UInt8) : UInt8 = a - b + +def Stdlib.UInt8.mul(a: UInt8, b: UInt8) : UInt8 = a * b + +def Stdlib.UInt8.div(a: UInt8, b: UInt8) : UInt8 = a / b + +def Stdlib.UInt8.max(a: UInt8, b: UInt8) : UInt8 = if a > b then a else b + +def Stdlib.UInt8.min(a: UInt8, b: UInt8) : UInt8 = if a < b then a else b + +def Stdlib.UInt8.mod(a: UInt8, b: UInt8) : UInt8 = a % b + +def Stdlib.UInt8.absoluteValue(a: UInt8) : UInt8 = a + +def Stdlib.UInt8.negate(a: UInt8) : UInt8 = 0uy - a + +def Stdlib.UInt8.power(base: UInt8, exponent: UInt8) : UInt8 = + if exponent == 0uy then 1uy + else if exponent == 1uy then base + else base * Stdlib.UInt8.power(base, exponent - 1uy) + +def Stdlib.UInt8.clamp(value: UInt8, limitA: UInt8, limitB: UInt8) : UInt8 = + let lower = Stdlib.UInt8.min(limitA, limitB) in + let upper = Stdlib.UInt8.max(limitA, limitB) in + Stdlib.UInt8.max(lower, Stdlib.UInt8.min(upper, value)) + +def Stdlib.UInt8.greaterThan(a: UInt8, b: UInt8) : Bool = a > b + +def Stdlib.UInt8.greaterThanOrEqualTo(a: UInt8, b: UInt8) : Bool = a >= b + +def Stdlib.UInt8.lessThan(a: UInt8, b: UInt8) : Bool = a < b + +def Stdlib.UInt8.lessThanOrEqualTo(a: UInt8, b: UInt8) : Bool = a <= b + +// Bitwise operations +def Stdlib.UInt8.bitwiseAnd(a: UInt8, b: UInt8) : UInt8 = a & b + +def Stdlib.UInt8.bitwiseOr(a: UInt8, b: UInt8) : UInt8 = a ||| b + +def Stdlib.UInt8.bitwiseXor(a: UInt8, b: UInt8) : UInt8 = a ^ b + +def Stdlib.UInt8.shiftLeft(a: UInt8, shift: UInt8) : UInt8 = a << shift + +def Stdlib.UInt8.shiftRight(a: UInt8, shift: UInt8) : UInt8 = a >> shift + +def Stdlib.UInt8.bitwiseNot(a: UInt8) : UInt8 = ~~~a + +// Count number of set bits (population count) +// Uses parallel bit counting algorithm (SWAR) +def Stdlib.UInt8.popcount(x: UInt8) : UInt8 = + let mask1 = 85uy in + let mask2 = 51uy in + let mask3 = 15uy in + let x = x - ((x >> 1uy) & mask1) in + let x = (x & mask2) + ((x >> 2uy) & mask2) in + let x = (x + (x >> 4uy)) & mask3 in + x + +// Convert a single digit (0-9) to its string representation +def Stdlib.UInt8.__digitToString(n: UInt8) : String = + match n with + | 0uy -> "0" + | 1uy -> "1" + | 2uy -> "2" + | 3uy -> "3" + | 4uy -> "4" + | 5uy -> "5" + | 6uy -> "6" + | 7uy -> "7" + | 8uy -> "8" + | 9uy -> "9" + | _ -> "?" + +// Convert an integer to its string representation +def Stdlib.UInt8.toString(n: UInt8) : String = + if n < 10uy then Stdlib.UInt8.__digitToString(n) + else Stdlib.UInt8.toString(n / 10uy) ++ Stdlib.UInt8.__digitToString(n % 10uy) + +// Check if integer is even +def Stdlib.UInt8.isEven(n: UInt8) : Bool = + (n % 2uy) == 0uy + +// Check if integer is odd +def Stdlib.UInt8.isOdd(n: UInt8) : Bool = + (n % 2uy) != 0uy + +// Sum all integers in a list +def Stdlib.UInt8.sum(list: List) : UInt8 = + Stdlib.List.fold(list, 0uy, (acc: UInt8, x: UInt8) => acc + x) diff --git a/backend/src/LibCompiler/stdlib/Uuid.dark b/backend/src/LibCompiler/stdlib/Uuid.dark new file mode 100644 index 0000000000..0432621f5d --- /dev/null +++ b/backend/src/LibCompiler/stdlib/Uuid.dark @@ -0,0 +1,61 @@ +// Uuid.dark - Stdlib.Uuid definitions +// +// Split from stdlib.dark for modular stdlib loading. + +// Stdlib.Uuid - UUID v4 generation +// ============================================================================ + +// Helper: convert nibble (0-15) to hex char +def Stdlib.Uuid.__nibbleToHex(n: Int64) : String = + match n with + | 0 -> "0" | 1 -> "1" | 2 -> "2" | 3 -> "3" + | 4 -> "4" | 5 -> "5" | 6 -> "6" | 7 -> "7" + | 8 -> "8" | 9 -> "9" | 10 -> "a" | 11 -> "b" + | 12 -> "c" | 13 -> "d" | 14 -> "e" | 15 -> "f" + | _ -> "?" + +// Helper: convert byte (from int64 at shift position) to 2 hex chars +def Stdlib.Uuid.__byteToHex(value: Int64, shift: Int64) : String = + let byte = (value >> shift) & 255 in + let hi = (byte >> 4) & 15 in + let lo = byte & 15 in + Stdlib.Uuid.__nibbleToHex(hi) ++ Stdlib.Uuid.__nibbleToHex(lo) + +// Generate UUID v4: xxxxxxxx-xxxx-4xxx-Nxxx-xxxxxxxxxxxx +// where N is 8, 9, a, or b (variant bits) +def Stdlib.Uuid.generate() : String = + let high = Stdlib.Random.int64() in + let low = Stdlib.Random.int64() in + // Set version (4) in byte 6: clear upper nibble, set to 4 + // Using XOR since we cleared the bits first with AND + // Mask -61441 = 0xFFFFFFFFFFFF0FFF (clears bits 12-15) + // Version 16384 = 0x4000 (sets bit 14 for version 4) + let highWithVersion = (high & (-61441)) ^ 16384 in + // Set variant (10xx) in byte 8: clear upper 2 bits, set to 10 + // Mask 4611686018427387903 = 0x3FFFFFFFFFFFFFFF (clears top 2 bits) + // Variant -9223372036854775808 = 0x8000000000000000 (sets top bit) + let lowWithVariant = (low & 4611686018427387903) ^ (-9223372036854775808) in + // Format: 8-4-4-4-12 hex chars + // bytes 0-3 (bits 32-63 of high) + Stdlib.Uuid.__byteToHex(highWithVersion, 56) ++ + Stdlib.Uuid.__byteToHex(highWithVersion, 48) ++ + Stdlib.Uuid.__byteToHex(highWithVersion, 40) ++ + Stdlib.Uuid.__byteToHex(highWithVersion, 32) ++ "-" ++ + // bytes 4-5 (bits 16-31 of high) + Stdlib.Uuid.__byteToHex(highWithVersion, 24) ++ + Stdlib.Uuid.__byteToHex(highWithVersion, 16) ++ "-" ++ + // bytes 6-7 (bits 0-15 of high) - contains version + Stdlib.Uuid.__byteToHex(highWithVersion, 8) ++ + Stdlib.Uuid.__byteToHex(highWithVersion, 0) ++ "-" ++ + // bytes 8-9 (bits 48-63 of low) - contains variant + Stdlib.Uuid.__byteToHex(lowWithVariant, 56) ++ + Stdlib.Uuid.__byteToHex(lowWithVariant, 48) ++ "-" ++ + // bytes 10-15 (bits 0-47 of low) + Stdlib.Uuid.__byteToHex(lowWithVariant, 40) ++ + Stdlib.Uuid.__byteToHex(lowWithVariant, 32) ++ + Stdlib.Uuid.__byteToHex(lowWithVariant, 24) ++ + Stdlib.Uuid.__byteToHex(lowWithVariant, 16) ++ + Stdlib.Uuid.__byteToHex(lowWithVariant, 8) ++ + Stdlib.Uuid.__byteToHex(lowWithVariant, 0) + +// ============================================================================= diff --git a/backend/src/LibCompiler/stdlib/__FingerTree.dark b/backend/src/LibCompiler/stdlib/__FingerTree.dark new file mode 100644 index 0000000000..29c0afec78 --- /dev/null +++ b/backend/src/LibCompiler/stdlib/__FingerTree.dark @@ -0,0 +1,1400 @@ +// __FingerTree.dark - Stdlib.__FingerTree definitions +// +// Split from stdlib.dark for modular stdlib loading. + +// Stdlib.__FingerTree - Internal FingerTree implementation +// ============================================================================= +// +// A Finger Tree provides O(1) amortized access to both ends and O(log n) indexed access. +// This implementation uses pointer tagging for efficient representation: +// +// Tags (low 3 bits): +// 0: Empty (NULL pointer) +// 1: Single element [elem:8] +// 2: Deep node [measure:8][prefix_count:8][p0-p3:32][middle:8][suffix_count:8][s0-s3:32] +// 3: Node2 [elem0:8][elem1:8] +// 4: Node3 [elem0:8][elem1:8][elem2:8] +// +// Digits (prefix/suffix) store 1-4 elements inline with a count byte. +// The measure field caches the total element count for O(1) length queries. +// ============================================================================= + +// ----------------------------------------------------------------------------- +// Tag constants +// ----------------------------------------------------------------------------- +def Stdlib.__FingerTree.__TAG_EMPTY() : Int64 = 0 +def Stdlib.__FingerTree.__TAG_SINGLE() : Int64 = 1 +def Stdlib.__FingerTree.__TAG_DEEP() : Int64 = 2 +def Stdlib.__FingerTree.__TAG_NODE2() : Int64 = 3 +def Stdlib.__FingerTree.__TAG_NODE3() : Int64 = 4 +def Stdlib.__FingerTree.__TAG_LEAF() : Int64 = 5 + +// ----------------------------------------------------------------------------- +// Pointer tagging helpers +// ----------------------------------------------------------------------------- + +// Get tag from tagged pointer (low 3 bits) +def Stdlib.__FingerTree.__getTag(tree: List) : Int64 = + __list_get_tag(tree) + +// Clear tag to get raw pointer +def Stdlib.__FingerTree.__toRawPtr(tree: List) : RawPtr = + __list_to_rawptr(tree) + +// Create tagged pointer from raw pointer and tag +def Stdlib.__FingerTree.__fromRawPtr(ptr: RawPtr, tag: Int64) : List = + __rawptr_to_list(ptr, tag) + +// Check if tree is empty +def Stdlib.__FingerTree.__isNull(tree: List) : Bool = + __list_is_null(tree) + +// ----------------------------------------------------------------------------- +// Single node operations +// ----------------------------------------------------------------------------- + +// Create a Single node: [node:8] with tag 1 (stores TreeNode pointer, not element directly) +def Stdlib.__FingerTree.__allocSingle(node: List) : List = + let ptr = __raw_alloc(16) in + let _ = __raw_set>(ptr, 0, node) in + let _ = __raw_set(ptr, 8, 1) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_SINGLE()) + +// Get element from Single node (returns TreeNode pointer, not element directly) +def Stdlib.__FingerTree.__getSingleElem(tree: List) : List = + let ptr = Stdlib.__FingerTree.__toRawPtr(tree) in + __raw_get>(ptr, 0) + +// ----------------------------------------------------------------------------- +// LEAF node operations (wraps actual elements for type-uniform design) +// ----------------------------------------------------------------------------- + +// Create a LEAF node: [value:8] with tag 5 +def Stdlib.__FingerTree.__allocLeaf(value: a) : List = + let ptr = __raw_alloc(16) in + let _ = __raw_set(ptr, 0, value) in + let _ = __raw_set(ptr, 8, 1) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_LEAF()) + +// Get value from LEAF node +def Stdlib.__FingerTree.__getLeafValue(leaf: List) : a = + let ptr = Stdlib.__FingerTree.__toRawPtr(leaf) in + __raw_get(ptr, 0) + +// Get measure (element count) of any TreeNode +def Stdlib.__FingerTree.__nodeMeasure(node: List) : Int64 = + let tag = Stdlib.__FingerTree.__getTag(node) in + if tag == Stdlib.__FingerTree.__TAG_LEAF() then 1 + else if tag == Stdlib.__FingerTree.__TAG_NODE2() then + let ptr = Stdlib.__FingerTree.__toRawPtr(node) in + __raw_get(ptr, 16) // measure at offset 16 + else if tag == Stdlib.__FingerTree.__TAG_NODE3() then + let ptr = Stdlib.__FingerTree.__toRawPtr(node) in + __raw_get(ptr, 24) // measure at offset 24 + else 0 + +// ----------------------------------------------------------------------------- +// Node2/Node3 operations (for internal spine) +// ----------------------------------------------------------------------------- + +// Create Node2: [child0:8][child1:8][measure:8] with tag 3 +// Children should be TreeNodes (LEAF, NODE2, or NODE3) +def Stdlib.__FingerTree.__allocNode2(c0: List, c1: List, measure: Int64) : List = + let ptr = __raw_alloc(32) in + let _ = __raw_set>(ptr, 0, c0) in + let _ = __raw_set>(ptr, 8, c1) in + let _ = __raw_set(ptr, 16, measure) in + let _ = __raw_set(ptr, 24, 1) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_NODE2()) + +// Create Node3: [child0:8][child1:8][child2:8][measure:8] with tag 4 +// Children should be TreeNodes (LEAF, NODE2, or NODE3) +def Stdlib.__FingerTree.__allocNode3(c0: List, c1: List, c2: List, measure: Int64) : List = + let ptr = __raw_alloc(40) in + let _ = __raw_set>(ptr, 0, c0) in + let _ = __raw_set>(ptr, 8, c1) in + let _ = __raw_set>(ptr, 16, c2) in + let _ = __raw_set(ptr, 24, measure) in + let _ = __raw_set(ptr, 32, 1) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_NODE3()) + +// Get child from NODE2 at index (0 or 1) +def Stdlib.__FingerTree.__node2GetChild(node: List, index: Int64) : List = + let ptr = Stdlib.__FingerTree.__toRawPtr(node) in + __raw_get>(ptr, index * 8) + +// Get child from NODE3 at index (0, 1, or 2) +def Stdlib.__FingerTree.__node3GetChild(node: List, index: Int64) : List = + let ptr = Stdlib.__FingerTree.__toRawPtr(node) in + __raw_get>(ptr, index * 8) + +// ----------------------------------------------------------------------------- +// Deep node structure +// ----------------------------------------------------------------------------- +// Deep layout: [measure:8][prefix_count:8][p0:8][p1:8][p2:8][p3:8][middle:8][suffix_count:8][s0:8][s1:8][s2:8][s3:8] +// Offsets: 0 8 16 24 32 40 48 56 64 72 80 88 +// Total: 96 bytes + +def Stdlib.__FingerTree.__DEEP_MEASURE_OFF() : Int64 = 0 +def Stdlib.__FingerTree.__DEEP_PREFIX_COUNT_OFF() : Int64 = 8 +def Stdlib.__FingerTree.__DEEP_PREFIX_OFF() : Int64 = 16 +def Stdlib.__FingerTree.__DEEP_MIDDLE_OFF() : Int64 = 48 +def Stdlib.__FingerTree.__DEEP_SUFFIX_COUNT_OFF() : Int64 = 56 +def Stdlib.__FingerTree.__DEEP_SUFFIX_OFF() : Int64 = 64 + +// Allocate Deep node with prefix and suffix counts +def Stdlib.__FingerTree.__allocDeep(measure: Int64, prefixCount: Int64, suffixCount: Int64) : RawPtr = + let ptr = __raw_alloc(104) in + let _ = __raw_set(ptr, Stdlib.__FingerTree.__DEEP_MEASURE_OFF(), measure) in + let _ = __raw_set(ptr, Stdlib.__FingerTree.__DEEP_PREFIX_COUNT_OFF(), prefixCount) in + let _ = __raw_set(ptr, Stdlib.__FingerTree.__DEEP_SUFFIX_COUNT_OFF(), suffixCount) in + let _ = __raw_set(ptr, 96, 1) in + ptr + +// Get measure from Deep node +def Stdlib.__FingerTree.__getDeepMeasure(tree: List) : Int64 = + let ptr = Stdlib.__FingerTree.__toRawPtr(tree) in + __raw_get(ptr, Stdlib.__FingerTree.__DEEP_MEASURE_OFF()) + +// Get prefix count from Deep node +def Stdlib.__FingerTree.__getDeepPrefixCount(tree: List) : Int64 = + let ptr = Stdlib.__FingerTree.__toRawPtr(tree) in + __raw_get(ptr, Stdlib.__FingerTree.__DEEP_PREFIX_COUNT_OFF()) + +// Get suffix count from Deep node +def Stdlib.__FingerTree.__getDeepSuffixCount(tree: List) : Int64 = + let ptr = Stdlib.__FingerTree.__toRawPtr(tree) in + __raw_get(ptr, Stdlib.__FingerTree.__DEEP_SUFFIX_COUNT_OFF()) + +// Get prefix TreeNode at index (0-3) +def Stdlib.__FingerTree.__getDeepPrefixAt(tree: List, index: Int64) : List = + let ptr = Stdlib.__FingerTree.__toRawPtr(tree) in + __raw_get>(ptr, Stdlib.__FingerTree.__DEEP_PREFIX_OFF() + (index * 8)) + +// Get suffix TreeNode at index (0-3) +def Stdlib.__FingerTree.__getDeepSuffixAt(tree: List, index: Int64) : List = + let ptr = Stdlib.__FingerTree.__toRawPtr(tree) in + __raw_get>(ptr, Stdlib.__FingerTree.__DEEP_SUFFIX_OFF() + (index * 8)) + +// Get middle tree from Deep node (type-uniform: middle is also List) +def Stdlib.__FingerTree.__getDeepMiddle(tree: List) : List = + let ptr = Stdlib.__FingerTree.__toRawPtr(tree) in + __raw_get>(ptr, Stdlib.__FingerTree.__DEEP_MIDDLE_OFF()) + +// Set prefix element at index (stores TreeNode, not raw element) +def Stdlib.__FingerTree.__setDeepPrefixAt(ptr: RawPtr, index: Int64, node: List) : Unit = + __raw_set>(ptr, Stdlib.__FingerTree.__DEEP_PREFIX_OFF() + (index * 8), node) + +// Conditionally copy prefix element from a source tree +def Stdlib.__FingerTree.__copyDeepPrefixAtIf(dstPtr: RawPtr, shouldCopy: Bool, dstIndex: Int64, srcTree: List, srcIndex: Int64) : Unit = + if shouldCopy then + Stdlib.__FingerTree.__setDeepPrefixAt(dstPtr, dstIndex, Stdlib.__FingerTree.__getDeepPrefixAt(srcTree, srcIndex)) + else () + +// Conditionally copy/update prefix element from a source tree +def Stdlib.__FingerTree.__copyDeepPrefixAtOrIf( + dstPtr: RawPtr, + shouldCopy: Bool, + dstIndex: Int64, + srcTree: List, + srcIndex: Int64, + useReplacement: Bool, + replacement: List +) : Unit = + if shouldCopy then + if useReplacement then Stdlib.__FingerTree.__setDeepPrefixAt(dstPtr, dstIndex, replacement) + else Stdlib.__FingerTree.__setDeepPrefixAt(dstPtr, dstIndex, Stdlib.__FingerTree.__getDeepPrefixAt(srcTree, srcIndex)) + else () + +// Set suffix element at index (stores TreeNode, not raw element) +def Stdlib.__FingerTree.__setDeepSuffixAt(ptr: RawPtr, index: Int64, node: List) : Unit = + __raw_set>(ptr, Stdlib.__FingerTree.__DEEP_SUFFIX_OFF() + (index * 8), node) + +// Conditionally copy suffix element from a source tree +def Stdlib.__FingerTree.__copyDeepSuffixAtIf(dstPtr: RawPtr, shouldCopy: Bool, dstIndex: Int64, srcTree: List, srcIndex: Int64) : Unit = + if shouldCopy then + Stdlib.__FingerTree.__setDeepSuffixAt(dstPtr, dstIndex, Stdlib.__FingerTree.__getDeepSuffixAt(srcTree, srcIndex)) + else () + +// Conditionally copy/update suffix element from a source tree +def Stdlib.__FingerTree.__copyDeepSuffixAtOrIf( + dstPtr: RawPtr, + shouldCopy: Bool, + dstIndex: Int64, + srcTree: List, + srcIndex: Int64, + useReplacement: Bool, + replacement: List +) : Unit = + if shouldCopy then + if useReplacement then Stdlib.__FingerTree.__setDeepSuffixAt(dstPtr, dstIndex, replacement) + else Stdlib.__FingerTree.__setDeepSuffixAt(dstPtr, dstIndex, Stdlib.__FingerTree.__getDeepSuffixAt(srcTree, srcIndex)) + else () + +// Set middle tree (type-uniform: middle is also List) +def Stdlib.__FingerTree.__setDeepMiddle(ptr: RawPtr, middle: List) : Unit = + __raw_set>(ptr, Stdlib.__FingerTree.__DEEP_MIDDLE_OFF(), middle) + +// ----------------------------------------------------------------------------- +// Public API +// ----------------------------------------------------------------------------- + +// Create an empty FingerTree +def Stdlib.__FingerTree.empty() : List = + __list_empty() + +// Check if the tree is empty +def Stdlib.__FingerTree.isEmpty(tree: List) : Bool = + Stdlib.__FingerTree.__isNull(tree) + +// Get the length of the tree (O(1) for Deep, O(1) for others) +def Stdlib.__FingerTree.length(tree: List) : Int64 = + if Stdlib.__FingerTree.__isNull(tree) then 0 + else + let tag = Stdlib.__FingerTree.__getTag(tree) in + if tag == Stdlib.__FingerTree.__TAG_SINGLE() then + // SINGLE contains a TreeNode - return its measure + let node = Stdlib.__FingerTree.__getSingleElem(tree) in + Stdlib.__FingerTree.__nodeMeasure(node) + else if tag == Stdlib.__FingerTree.__TAG_DEEP() then + Stdlib.__FingerTree.__getDeepMeasure(tree) + else 0 + +def Stdlib.__FingerTree.__lengthFloat(tree: List) : Int64 = + Stdlib.__FingerTree.length(tree) + +// Helper: get leftmost element from a TreeNode (recursively unwrap until LEAF) +def Stdlib.__FingerTree.__headOfNode(node: List) : a = + let tag = Stdlib.__FingerTree.__getTag(node) in + if tag == Stdlib.__FingerTree.__TAG_LEAF() then + Stdlib.__FingerTree.__getLeafValue(node) + else if tag == Stdlib.__FingerTree.__TAG_NODE2() then + Stdlib.__FingerTree.__headOfNode(Stdlib.__FingerTree.__node2GetChild(node, 0)) + else if tag == Stdlib.__FingerTree.__TAG_NODE3() then + Stdlib.__FingerTree.__headOfNode(Stdlib.__FingerTree.__node3GetChild(node, 0)) + else + // Fallback - shouldn't happen + Stdlib.__FingerTree.__getLeafValue(node) + +// Helper: get rightmost element from a TreeNode (recursively unwrap until LEAF) +def Stdlib.__FingerTree.__lastOfNode(node: List) : a = + let tag = Stdlib.__FingerTree.__getTag(node) in + if tag == Stdlib.__FingerTree.__TAG_LEAF() then + Stdlib.__FingerTree.__getLeafValue(node) + else if tag == Stdlib.__FingerTree.__TAG_NODE2() then + Stdlib.__FingerTree.__lastOfNode(Stdlib.__FingerTree.__node2GetChild(node, 1)) + else if tag == Stdlib.__FingerTree.__TAG_NODE3() then + Stdlib.__FingerTree.__lastOfNode(Stdlib.__FingerTree.__node3GetChild(node, 2)) + else + // Fallback - shouldn't happen + Stdlib.__FingerTree.__getLeafValue(node) + +// Get the first element (O(1)) +def Stdlib.__FingerTree.head(tree: List) : Stdlib.Option.Option = + if Stdlib.__FingerTree.__isNull(tree) then None + else + let tag = Stdlib.__FingerTree.__getTag(tree) in + if tag == Stdlib.__FingerTree.__TAG_SINGLE() then + // SINGLE stores a TreeNode - get its leftmost element + let node = Stdlib.__FingerTree.__getSingleElem(tree) in + Some(Stdlib.__FingerTree.__headOfNode(node)) + else if tag == Stdlib.__FingerTree.__TAG_DEEP() then + // Get first TreeNode from prefix, then get its leftmost element + let firstNode = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 0) in + Some(Stdlib.__FingerTree.__headOfNode(firstNode)) + else None + +// Get the first element without Option wrapper (caller must ensure non-empty) +def Stdlib.__FingerTree.headUnsafe(tree: List) : a = + let tag = Stdlib.__FingerTree.__getTag(tree) in + if tag == Stdlib.__FingerTree.__TAG_SINGLE() then + let node = Stdlib.__FingerTree.__getSingleElem(tree) in + Stdlib.__FingerTree.__headOfNode(node) + else + // DEEP + let firstNode = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 0) in + Stdlib.__FingerTree.__headOfNode(firstNode) + +// Get the last element (O(1)) +def Stdlib.__FingerTree.last(tree: List) : Stdlib.Option.Option = + if Stdlib.__FingerTree.__isNull(tree) then None + else + let tag = Stdlib.__FingerTree.__getTag(tree) in + if tag == Stdlib.__FingerTree.__TAG_SINGLE() then + // SINGLE stores a TreeNode - get its rightmost element + let node = Stdlib.__FingerTree.__getSingleElem(tree) in + Some(Stdlib.__FingerTree.__lastOfNode(node)) + else if tag == Stdlib.__FingerTree.__TAG_DEEP() then + // Get last TreeNode from suffix, then get its rightmost element + let suffixCount = Stdlib.__FingerTree.__getDeepSuffixCount(tree) in + let lastNode = Stdlib.__FingerTree.__getDeepSuffixAt(tree, suffixCount - 1) in + Some(Stdlib.__FingerTree.__lastOfNode(lastNode)) + else None + +// Helper: explode a TreeNode into its leaves, pushing them to the front of a tree +def Stdlib.__FingerTree.__explodeNodeToFront(node: List, tree: List) : List = + let tag = Stdlib.__FingerTree.__getTag(node) in + if tag == Stdlib.__FingerTree.__TAG_LEAF() then + Stdlib.__FingerTree.__pushNode(tree, node) + else if tag == Stdlib.__FingerTree.__TAG_NODE2() then + let c0 = Stdlib.__FingerTree.__node2GetChild(node, 0) in + let c1 = Stdlib.__FingerTree.__node2GetChild(node, 1) in + // Push c0 then c1 (c1 first to front, then c0 to front) + let t1 = Stdlib.__FingerTree.__explodeNodeToFront(c1, tree) in + Stdlib.__FingerTree.__explodeNodeToFront(c0, t1) + else if tag == Stdlib.__FingerTree.__TAG_NODE3() then + let c0 = Stdlib.__FingerTree.__node3GetChild(node, 0) in + let c1 = Stdlib.__FingerTree.__node3GetChild(node, 1) in + let c2 = Stdlib.__FingerTree.__node3GetChild(node, 2) in + // Push c2 first, then c1, then c0 + let t1 = Stdlib.__FingerTree.__explodeNodeToFront(c2, tree) in + let t2 = Stdlib.__FingerTree.__explodeNodeToFront(c1, t1) in + Stdlib.__FingerTree.__explodeNodeToFront(c0, t2) + else tree + +// Helper: tail of a TreeNode (remove first element, return remaining as tree) +def Stdlib.__FingerTree.__tailOfNode(node: List) : List = + let tag = Stdlib.__FingerTree.__getTag(node) in + if tag == Stdlib.__FingerTree.__TAG_LEAF() then + Stdlib.__FingerTree.empty() + else if tag == Stdlib.__FingerTree.__TAG_NODE2() then + // NODE2: remove first child's first element + let c0 = Stdlib.__FingerTree.__node2GetChild(node, 0) in + let c1 = Stdlib.__FingerTree.__node2GetChild(node, 1) in + let c0tag = Stdlib.__FingerTree.__getTag(c0) in + if c0tag == Stdlib.__FingerTree.__TAG_LEAF() then + // c0 is a leaf, just return tree with c1 exploded + Stdlib.__FingerTree.__explodeNodeToFront(c1, Stdlib.__FingerTree.empty()) + else + // c0 is a nested node - recurse to get tail of c0, then add c1 + let tailOfC0 = Stdlib.__FingerTree.__tailOfNode(c0) in + Stdlib.__FingerTree.__explodeNodeToFront(c1, tailOfC0) + else if tag == Stdlib.__FingerTree.__TAG_NODE3() then + let c0 = Stdlib.__FingerTree.__node3GetChild(node, 0) in + let c1 = Stdlib.__FingerTree.__node3GetChild(node, 1) in + let c2 = Stdlib.__FingerTree.__node3GetChild(node, 2) in + let c0tag = Stdlib.__FingerTree.__getTag(c0) in + if c0tag == Stdlib.__FingerTree.__TAG_LEAF() then + // c0 is a leaf, return tree with c1 and c2 exploded + let t1 = Stdlib.__FingerTree.__explodeNodeToFront(c2, Stdlib.__FingerTree.empty()) in + Stdlib.__FingerTree.__explodeNodeToFront(c1, t1) + else + // c0 is a nested node - recurse to get tail of c0, then add c1 and c2 + let tailOfC0 = Stdlib.__FingerTree.__tailOfNode(c0) in + let t1 = Stdlib.__FingerTree.__explodeNodeToFront(c2, tailOfC0) in + Stdlib.__FingerTree.__explodeNodeToFront(c1, t1) + else Stdlib.__FingerTree.empty() + +// Tail: remove first element (O(1) amortized) +def Stdlib.__FingerTree.tail(tree: List) : List = + if Stdlib.__FingerTree.__isNull(tree) then + Stdlib.__FingerTree.empty() + else + let tag = Stdlib.__FingerTree.__getTag(tree) in + if tag == Stdlib.__FingerTree.__TAG_SINGLE() then + // Single node - tail depends on what the node contains + let node = Stdlib.__FingerTree.__getSingleElem(tree) in + Stdlib.__FingerTree.__tailOfNode(node) + else if tag == Stdlib.__FingerTree.__TAG_DEEP() then + let prefixCount = Stdlib.__FingerTree.__getDeepPrefixCount(tree) in + let p0 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 0) in + let p0tag = Stdlib.__FingerTree.__getTag(p0) in + if p0tag == Stdlib.__FingerTree.__TAG_LEAF() then + // First prefix element is a LEAF - remove it + if prefixCount > 1 then + // Shift remaining prefix elements left + let measure = Stdlib.__FingerTree.__getDeepMeasure(tree) in + let suffixCount = Stdlib.__FingerTree.__getDeepSuffixCount(tree) in + let ptr = Stdlib.__FingerTree.__allocDeep(measure - 1, prefixCount - 1, suffixCount) in + // Copy prefix elements shifted left + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 2, 0, tree, 1) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 3, 1, tree, 2) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 4, 2, tree, 3) in + // Copy middle and suffix + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, Stdlib.__FingerTree.__getDeepMiddle(tree)) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 1, 0, tree, 0) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 2, 1, tree, 1) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 3, 2, tree, 2) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 4, 3, tree, 3) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + else + // Only one prefix element (a LEAF), need to borrow from middle or use suffix + let middle = Stdlib.__FingerTree.__getDeepMiddle(tree) in + if Stdlib.__FingerTree.isEmpty(middle) then + // Middle is empty, suffix becomes the tree + let suffixCount = Stdlib.__FingerTree.__getDeepSuffixCount(tree) in + if suffixCount == 1 then + Stdlib.__FingerTree.__allocSingle(Stdlib.__FingerTree.__getDeepSuffixAt(tree, 0)) + else if suffixCount == 2 then + // Two elements: make DEEP with 1 prefix, 1 suffix + let s0 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 0) in + let s1 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 1) in + let measure = Stdlib.__FingerTree.__nodeMeasure(s0) + Stdlib.__FingerTree.__nodeMeasure(s1) in + let ptr = Stdlib.__FingerTree.__allocDeep(measure, 1, 1) in + let _ = Stdlib.__FingerTree.__setDeepPrefixAt(ptr, 0, s0) in + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, Stdlib.__FingerTree.empty()) in + let _ = Stdlib.__FingerTree.__setDeepSuffixAt(ptr, 0, s1) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + else if suffixCount == 3 then + // Three elements: 1 prefix, 2 suffix or 2 prefix, 1 suffix + let s0 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 0) in + let s1 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 1) in + let s2 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 2) in + let m0 = Stdlib.__FingerTree.__nodeMeasure(s0) in + let m1 = Stdlib.__FingerTree.__nodeMeasure(s1) in + let m2 = Stdlib.__FingerTree.__nodeMeasure(s2) in + let ptr = Stdlib.__FingerTree.__allocDeep(m0 + m1 + m2, 1, 2) in + let _ = Stdlib.__FingerTree.__setDeepPrefixAt(ptr, 0, s0) in + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, Stdlib.__FingerTree.empty()) in + let _ = Stdlib.__FingerTree.__setDeepSuffixAt(ptr, 0, s1) in + let _ = Stdlib.__FingerTree.__setDeepSuffixAt(ptr, 1, s2) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + else + // Four elements: 2 prefix, 2 suffix + let s0 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 0) in + let s1 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 1) in + let s2 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 2) in + let s3 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 3) in + let m0 = Stdlib.__FingerTree.__nodeMeasure(s0) in + let m1 = Stdlib.__FingerTree.__nodeMeasure(s1) in + let m2 = Stdlib.__FingerTree.__nodeMeasure(s2) in + let m3 = Stdlib.__FingerTree.__nodeMeasure(s3) in + let ptr = Stdlib.__FingerTree.__allocDeep(m0 + m1 + m2 + m3, 2, 2) in + let _ = Stdlib.__FingerTree.__setDeepPrefixAt(ptr, 0, s0) in + let _ = Stdlib.__FingerTree.__setDeepPrefixAt(ptr, 1, s1) in + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, Stdlib.__FingerTree.empty()) in + let _ = Stdlib.__FingerTree.__setDeepSuffixAt(ptr, 0, s2) in + let _ = Stdlib.__FingerTree.__setDeepSuffixAt(ptr, 1, s3) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + else + // Borrow from middle - get head of middle (a NODE2 or NODE3) + // The head of middle becomes the new prefix (exploded) + let middleTag = Stdlib.__FingerTree.__getTag(middle) in + if middleTag == Stdlib.__FingerTree.__TAG_SINGLE() then + // Middle is SINGLE(node) - explode node to prefix, empty middle + let node = Stdlib.__FingerTree.__getSingleElem(middle) in + let ntag = Stdlib.__FingerTree.__getTag(node) in + let suffixCount = Stdlib.__FingerTree.__getDeepSuffixCount(tree) in + if ntag == Stdlib.__FingerTree.__TAG_NODE2() then + let c0 = Stdlib.__FingerTree.__node2GetChild(node, 0) in + let c1 = Stdlib.__FingerTree.__node2GetChild(node, 1) in + let newMeasure = Stdlib.__FingerTree.__getDeepMeasure(tree) - 1 in + let ptr = Stdlib.__FingerTree.__allocDeep(newMeasure, 2, suffixCount) in + let _ = Stdlib.__FingerTree.__setDeepPrefixAt(ptr, 0, c0) in + let _ = Stdlib.__FingerTree.__setDeepPrefixAt(ptr, 1, c1) in + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, Stdlib.__FingerTree.empty()) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 1, 0, tree, 0) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 2, 1, tree, 1) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 3, 2, tree, 2) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 4, 3, tree, 3) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + else if ntag == Stdlib.__FingerTree.__TAG_NODE3() then + let c0 = Stdlib.__FingerTree.__node3GetChild(node, 0) in + let c1 = Stdlib.__FingerTree.__node3GetChild(node, 1) in + let c2 = Stdlib.__FingerTree.__node3GetChild(node, 2) in + let newMeasure = Stdlib.__FingerTree.__getDeepMeasure(tree) - 1 in + let ptr = Stdlib.__FingerTree.__allocDeep(newMeasure, 3, suffixCount) in + let _ = Stdlib.__FingerTree.__setDeepPrefixAt(ptr, 0, c0) in + let _ = Stdlib.__FingerTree.__setDeepPrefixAt(ptr, 1, c1) in + let _ = Stdlib.__FingerTree.__setDeepPrefixAt(ptr, 2, c2) in + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, Stdlib.__FingerTree.empty()) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 1, 0, tree, 0) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 2, 1, tree, 1) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 3, 2, tree, 2) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 4, 3, tree, 3) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + else tree // Shouldn't happen + else if middleTag == Stdlib.__FingerTree.__TAG_DEEP() then + // Middle is DEEP - need to call tail on middle to get new middle + // and use head of old middle as new prefix + // Actually we need to get the first NODE from middle, not element + // This is complex - let's use a simpler approach for now + // Just rebuild from elements 1 to end + let len = Stdlib.__FingerTree.length(tree) in + Stdlib.__FingerTree.__rebuildFrom(tree, 1, len, Stdlib.__FingerTree.empty()) + else tree + else + // First prefix element is NODE2 or NODE3 - need to extract from it + // Remove first element from node and put rest back as prefix + // This is complex, use rebuild approach + let len = Stdlib.__FingerTree.length(tree) in + Stdlib.__FingerTree.__rebuildFrom(tree, 1, len, Stdlib.__FingerTree.empty()) + else Stdlib.__FingerTree.empty() + +// Helper: rebuild tree from elements starting at index +def Stdlib.__FingerTree.__rebuildFrom(source: List, idx: Int64, len: Int64, acc: List) : List = + if idx >= len then acc + else + let elemOpt = Stdlib.__FingerTree.getAt(source, idx) in + match elemOpt with + | Some(elem) -> Stdlib.__FingerTree.__rebuildFrom(source, idx + 1, len, Stdlib.__FingerTree.pushBack(acc, elem)) + | None -> acc + +// Helper: rebuild tree from elements in range [0, endIdx) +def Stdlib.__FingerTree.__rebuildTo(source: List, idx: Int64, endIdx: Int64, acc: List) : List = + if idx >= endIdx then acc + else + let elemOpt = Stdlib.__FingerTree.getAt(source, idx) in + match elemOpt with + | Some(elem) -> Stdlib.__FingerTree.__rebuildTo(source, idx + 1, endIdx, Stdlib.__FingerTree.pushBack(acc, elem)) + | None -> acc + +// Helper: explode a TreeNode into its leaves, pushing them to the back of a tree (mirror of __explodeNodeToFront) +def Stdlib.__FingerTree.__explodeNodeToBack(node: List, tree: List) : List = + let tag = Stdlib.__FingerTree.__getTag(node) in + if tag == Stdlib.__FingerTree.__TAG_LEAF() then + Stdlib.__FingerTree.__pushBackNode(tree, node) + else if tag == Stdlib.__FingerTree.__TAG_NODE2() then + let c0 = Stdlib.__FingerTree.__node2GetChild(node, 0) in + let c1 = Stdlib.__FingerTree.__node2GetChild(node, 1) in + // Push c0 then c1 to back (c0 first, then c1) + let t1 = Stdlib.__FingerTree.__explodeNodeToBack(c0, tree) in + Stdlib.__FingerTree.__explodeNodeToBack(c1, t1) + else if tag == Stdlib.__FingerTree.__TAG_NODE3() then + let c0 = Stdlib.__FingerTree.__node3GetChild(node, 0) in + let c1 = Stdlib.__FingerTree.__node3GetChild(node, 1) in + let c2 = Stdlib.__FingerTree.__node3GetChild(node, 2) in + // Push c0 first, then c1, then c2 + let t1 = Stdlib.__FingerTree.__explodeNodeToBack(c0, tree) in + let t2 = Stdlib.__FingerTree.__explodeNodeToBack(c1, t1) in + Stdlib.__FingerTree.__explodeNodeToBack(c2, t2) + else tree + +// Helper: init of a TreeNode (remove last element, return remaining as tree) - mirror of __tailOfNode +def Stdlib.__FingerTree.__initOfNode(node: List) : List = + let tag = Stdlib.__FingerTree.__getTag(node) in + if tag == Stdlib.__FingerTree.__TAG_LEAF() then + Stdlib.__FingerTree.empty() + else if tag == Stdlib.__FingerTree.__TAG_NODE2() then + // NODE2: remove last child's last element + let c0 = Stdlib.__FingerTree.__node2GetChild(node, 0) in + let c1 = Stdlib.__FingerTree.__node2GetChild(node, 1) in + let c1tag = Stdlib.__FingerTree.__getTag(c1) in + if c1tag == Stdlib.__FingerTree.__TAG_LEAF() then + // c1 is a leaf, just return tree with c0 exploded + Stdlib.__FingerTree.__explodeNodeToBack(c0, Stdlib.__FingerTree.empty()) + else + // c1 is a nested node - recurse to get init of c1, then add c0 + let initOfC1 = Stdlib.__FingerTree.__initOfNode(c1) in + Stdlib.__FingerTree.__explodeNodeToBack(c0, initOfC1) + else if tag == Stdlib.__FingerTree.__TAG_NODE3() then + let c0 = Stdlib.__FingerTree.__node3GetChild(node, 0) in + let c1 = Stdlib.__FingerTree.__node3GetChild(node, 1) in + let c2 = Stdlib.__FingerTree.__node3GetChild(node, 2) in + let c2tag = Stdlib.__FingerTree.__getTag(c2) in + if c2tag == Stdlib.__FingerTree.__TAG_LEAF() then + // c2 is a leaf, return tree with c0 and c1 exploded + let t1 = Stdlib.__FingerTree.__explodeNodeToBack(c0, Stdlib.__FingerTree.empty()) in + Stdlib.__FingerTree.__explodeNodeToBack(c1, t1) + else + // c2 is a nested node - recurse to get init of c2, then add c0 and c1 + let initOfC2 = Stdlib.__FingerTree.__initOfNode(c2) in + let t1 = Stdlib.__FingerTree.__explodeNodeToBack(c0, initOfC2) in + Stdlib.__FingerTree.__explodeNodeToBack(c1, t1) + else Stdlib.__FingerTree.empty() + +// Init: remove last element (O(1) amortized) - mirror of tail +def Stdlib.__FingerTree.init(tree: List) : List = + if Stdlib.__FingerTree.__isNull(tree) then + Stdlib.__FingerTree.empty() + else + let tag = Stdlib.__FingerTree.__getTag(tree) in + if tag == Stdlib.__FingerTree.__TAG_SINGLE() then + // Single node - init depends on what the node contains + let node = Stdlib.__FingerTree.__getSingleElem(tree) in + Stdlib.__FingerTree.__initOfNode(node) + else if tag == Stdlib.__FingerTree.__TAG_DEEP() then + let suffixCount = Stdlib.__FingerTree.__getDeepSuffixCount(tree) in + let sLast = Stdlib.__FingerTree.__getDeepSuffixAt(tree, suffixCount - 1) in + let sLastTag = Stdlib.__FingerTree.__getTag(sLast) in + if sLastTag == Stdlib.__FingerTree.__TAG_LEAF() then + // Last suffix element is a LEAF - remove it + if suffixCount > 1 then + // Just reduce suffix count + let measure = Stdlib.__FingerTree.__getDeepMeasure(tree) in + let prefixCount = Stdlib.__FingerTree.__getDeepPrefixCount(tree) in + let ptr = Stdlib.__FingerTree.__allocDeep(measure - 1, prefixCount, suffixCount - 1) in + // Copy prefix + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 1, 0, tree, 0) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 2, 1, tree, 1) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 3, 2, tree, 2) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 4, 3, tree, 3) in + // Copy middle + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, Stdlib.__FingerTree.__getDeepMiddle(tree)) in + // Copy suffix (minus last) + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 2, 0, tree, 0) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 3, 1, tree, 1) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 4, 2, tree, 2) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + else + // Only one suffix element (a LEAF), need to borrow from middle or use prefix + let middle = Stdlib.__FingerTree.__getDeepMiddle(tree) in + if Stdlib.__FingerTree.isEmpty(middle) then + // Middle is empty, prefix becomes the tree + let prefixCount = Stdlib.__FingerTree.__getDeepPrefixCount(tree) in + if prefixCount == 1 then + Stdlib.__FingerTree.__allocSingle(Stdlib.__FingerTree.__getDeepPrefixAt(tree, 0)) + else if prefixCount == 2 then + // Two elements: make DEEP with 1 prefix, 1 suffix + let p0 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 0) in + let p1 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 1) in + let measure = Stdlib.__FingerTree.__nodeMeasure(p0) + Stdlib.__FingerTree.__nodeMeasure(p1) in + let ptr = Stdlib.__FingerTree.__allocDeep(measure, 1, 1) in + let _ = Stdlib.__FingerTree.__setDeepPrefixAt(ptr, 0, p0) in + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, Stdlib.__FingerTree.empty()) in + let _ = Stdlib.__FingerTree.__setDeepSuffixAt(ptr, 0, p1) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + else if prefixCount == 3 then + // Three elements: 2 prefix, 1 suffix + let p0 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 0) in + let p1 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 1) in + let p2 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 2) in + let m0 = Stdlib.__FingerTree.__nodeMeasure(p0) in + let m1 = Stdlib.__FingerTree.__nodeMeasure(p1) in + let m2 = Stdlib.__FingerTree.__nodeMeasure(p2) in + let ptr = Stdlib.__FingerTree.__allocDeep(m0 + m1 + m2, 2, 1) in + let _ = Stdlib.__FingerTree.__setDeepPrefixAt(ptr, 0, p0) in + let _ = Stdlib.__FingerTree.__setDeepPrefixAt(ptr, 1, p1) in + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, Stdlib.__FingerTree.empty()) in + let _ = Stdlib.__FingerTree.__setDeepSuffixAt(ptr, 0, p2) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + else + // Four elements: 2 prefix, 2 suffix + let p0 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 0) in + let p1 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 1) in + let p2 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 2) in + let p3 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 3) in + let m0 = Stdlib.__FingerTree.__nodeMeasure(p0) in + let m1 = Stdlib.__FingerTree.__nodeMeasure(p1) in + let m2 = Stdlib.__FingerTree.__nodeMeasure(p2) in + let m3 = Stdlib.__FingerTree.__nodeMeasure(p3) in + let ptr = Stdlib.__FingerTree.__allocDeep(m0 + m1 + m2 + m3, 2, 2) in + let _ = Stdlib.__FingerTree.__setDeepPrefixAt(ptr, 0, p0) in + let _ = Stdlib.__FingerTree.__setDeepPrefixAt(ptr, 1, p1) in + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, Stdlib.__FingerTree.empty()) in + let _ = Stdlib.__FingerTree.__setDeepSuffixAt(ptr, 0, p2) in + let _ = Stdlib.__FingerTree.__setDeepSuffixAt(ptr, 1, p3) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + else + // Borrow from middle - get last of middle (a NODE2 or NODE3) + // The last of middle becomes the new suffix (exploded) + let middleTag = Stdlib.__FingerTree.__getTag(middle) in + if middleTag == Stdlib.__FingerTree.__TAG_SINGLE() then + // Middle is SINGLE(node) - explode node to suffix, empty middle + let node = Stdlib.__FingerTree.__getSingleElem(middle) in + let ntag = Stdlib.__FingerTree.__getTag(node) in + let prefixCount = Stdlib.__FingerTree.__getDeepPrefixCount(tree) in + if ntag == Stdlib.__FingerTree.__TAG_NODE2() then + let c0 = Stdlib.__FingerTree.__node2GetChild(node, 0) in + let c1 = Stdlib.__FingerTree.__node2GetChild(node, 1) in + let newMeasure = Stdlib.__FingerTree.__getDeepMeasure(tree) - 1 in + let ptr = Stdlib.__FingerTree.__allocDeep(newMeasure, prefixCount, 2) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 1, 0, tree, 0) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 2, 1, tree, 1) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 3, 2, tree, 2) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 4, 3, tree, 3) in + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, Stdlib.__FingerTree.empty()) in + let _ = Stdlib.__FingerTree.__setDeepSuffixAt(ptr, 0, c0) in + let _ = Stdlib.__FingerTree.__setDeepSuffixAt(ptr, 1, c1) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + else if ntag == Stdlib.__FingerTree.__TAG_NODE3() then + let c0 = Stdlib.__FingerTree.__node3GetChild(node, 0) in + let c1 = Stdlib.__FingerTree.__node3GetChild(node, 1) in + let c2 = Stdlib.__FingerTree.__node3GetChild(node, 2) in + let newMeasure = Stdlib.__FingerTree.__getDeepMeasure(tree) - 1 in + let ptr = Stdlib.__FingerTree.__allocDeep(newMeasure, prefixCount, 3) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 1, 0, tree, 0) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 2, 1, tree, 1) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 3, 2, tree, 2) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 4, 3, tree, 3) in + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, Stdlib.__FingerTree.empty()) in + let _ = Stdlib.__FingerTree.__setDeepSuffixAt(ptr, 0, c0) in + let _ = Stdlib.__FingerTree.__setDeepSuffixAt(ptr, 1, c1) in + let _ = Stdlib.__FingerTree.__setDeepSuffixAt(ptr, 2, c2) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + else tree // Shouldn't happen + else if middleTag == Stdlib.__FingerTree.__TAG_DEEP() then + // Middle is DEEP - use rebuild approach for complex case + let len = Stdlib.__FingerTree.length(tree) in + Stdlib.__FingerTree.__rebuildTo(tree, 0, len - 1, Stdlib.__FingerTree.empty()) + else tree + else + // Last suffix element is NODE2 or NODE3 - need to extract from it + // Use rebuild approach for this complex case + let len = Stdlib.__FingerTree.length(tree) in + Stdlib.__FingerTree.__rebuildTo(tree, 0, len - 1, Stdlib.__FingerTree.empty()) + else Stdlib.__FingerTree.empty() + +// Create a single-element tree (wraps in LEAF, stores in SINGLE) +def Stdlib.__FingerTree.singleton(elem: a) : List = + let leaf = Stdlib.__FingerTree.__allocLeaf(elem) in + Stdlib.__FingerTree.__allocSingle(leaf) + +// Internal: push a TreeNode to front of tree (type-uniform - same type parameter!) +def Stdlib.__FingerTree.__pushNode(tree: List, node: List) : List = + if Stdlib.__FingerTree.__isNull(tree) then + Stdlib.__FingerTree.__allocSingle(node) + else + let tag = Stdlib.__FingerTree.__getTag(tree) in + if tag == Stdlib.__FingerTree.__TAG_SINGLE() then + // Single -> Deep with prefix=[node], suffix=[existing] + let existing = Stdlib.__FingerTree.__getSingleElem(tree) in + let nodeMeasure = Stdlib.__FingerTree.__nodeMeasure(node) in + let existingMeasure = Stdlib.__FingerTree.__nodeMeasure(existing) in + let ptr = Stdlib.__FingerTree.__allocDeep(nodeMeasure + existingMeasure, 1, 1) in + let _ = Stdlib.__FingerTree.__setDeepPrefixAt(ptr, 0, node) in + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, Stdlib.__FingerTree.empty()) in + let _ = Stdlib.__FingerTree.__setDeepSuffixAt(ptr, 0, existing) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + else if tag == Stdlib.__FingerTree.__TAG_DEEP() then + let prefixCount = Stdlib.__FingerTree.__getDeepPrefixCount(tree) in + let measure = Stdlib.__FingerTree.__getDeepMeasure(tree) in + let nodeMeasure = Stdlib.__FingerTree.__nodeMeasure(node) in + if prefixCount < 4 then + // Room in prefix - shift and add + let suffixCount = Stdlib.__FingerTree.__getDeepSuffixCount(tree) in + let ptr = Stdlib.__FingerTree.__allocDeep(measure + nodeMeasure, prefixCount + 1, suffixCount) in + // Set new node at front + let _ = Stdlib.__FingerTree.__setDeepPrefixAt(ptr, 0, node) in + // Copy existing prefix (shifted by 1) + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 1, 1, tree, 0) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 2, 2, tree, 1) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 3, 3, tree, 2) in + // Copy suffix + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 1, 0, tree, 0) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 2, 1, tree, 1) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 3, 2, tree, 2) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 4, 3, tree, 3) in + // Copy middle + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, Stdlib.__FingerTree.__getDeepMiddle(tree)) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + else + // Prefix is full (4 nodes) - create NODE3 from 3 nodes, push to middle + // Keep prefix[0] + new node as new prefix, push NODE3(prefix[1], prefix[2], prefix[3]) to middle + let p1 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 1) in + let p2 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 2) in + let p3 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 3) in + let m1 = Stdlib.__FingerTree.__nodeMeasure(p1) in + let m2 = Stdlib.__FingerTree.__nodeMeasure(p2) in + let m3 = Stdlib.__FingerTree.__nodeMeasure(p3) in + let node3 = Stdlib.__FingerTree.__allocNode3(p1, p2, p3, m1 + m2 + m3) in + // Recursively push NODE3 to middle (same type parameter!) + let newMiddle = Stdlib.__FingerTree.__pushNode(Stdlib.__FingerTree.__getDeepMiddle(tree), node3) in + // Build new tree with prefix=[node, prefix[0]], new middle, same suffix + let p0 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 0) in + let suffixCount = Stdlib.__FingerTree.__getDeepSuffixCount(tree) in + let ptr = Stdlib.__FingerTree.__allocDeep(measure + nodeMeasure, 2, suffixCount) in + let _ = Stdlib.__FingerTree.__setDeepPrefixAt(ptr, 0, node) in + let _ = Stdlib.__FingerTree.__setDeepPrefixAt(ptr, 1, p0) in + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, newMiddle) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 1, 0, tree, 0) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 2, 1, tree, 1) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 3, 2, tree, 2) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 4, 3, tree, 3) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + else + // Unknown tag - just return singleton with node + Stdlib.__FingerTree.__allocSingle(node) + +// Add element to front (O(1) amortized) +def Stdlib.__FingerTree.push(tree: List, elem: a) : List = + let leaf = Stdlib.__FingerTree.__allocLeaf(elem) in + Stdlib.__FingerTree.__pushNode(tree, leaf) + +// Internal: push a TreeNode to back of tree (type-uniform - same type parameter!) +def Stdlib.__FingerTree.__pushBackNode(tree: List, node: List) : List = + if Stdlib.__FingerTree.__isNull(tree) then + Stdlib.__FingerTree.__allocSingle(node) + else + let tag = Stdlib.__FingerTree.__getTag(tree) in + if tag == Stdlib.__FingerTree.__TAG_SINGLE() then + // Single -> Deep with prefix=[existing], suffix=[node] + let existing = Stdlib.__FingerTree.__getSingleElem(tree) in + let existingMeasure = Stdlib.__FingerTree.__nodeMeasure(existing) in + let nodeMeasure = Stdlib.__FingerTree.__nodeMeasure(node) in + let ptr = Stdlib.__FingerTree.__allocDeep(existingMeasure + nodeMeasure, 1, 1) in + let _ = Stdlib.__FingerTree.__setDeepPrefixAt(ptr, 0, existing) in + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, Stdlib.__FingerTree.empty()) in + let _ = Stdlib.__FingerTree.__setDeepSuffixAt(ptr, 0, node) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + else if tag == Stdlib.__FingerTree.__TAG_DEEP() then + let suffixCount = Stdlib.__FingerTree.__getDeepSuffixCount(tree) in + let measure = Stdlib.__FingerTree.__getDeepMeasure(tree) in + let nodeMeasure = Stdlib.__FingerTree.__nodeMeasure(node) in + if suffixCount < 4 then + // Room in suffix - add at end + let prefixCount = Stdlib.__FingerTree.__getDeepPrefixCount(tree) in + let ptr = Stdlib.__FingerTree.__allocDeep(measure + nodeMeasure, prefixCount, suffixCount + 1) in + // Copy prefix + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 1, 0, tree, 0) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 2, 1, tree, 1) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 3, 2, tree, 2) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 4, 3, tree, 3) in + // Copy existing suffix and add new node + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 1, 0, tree, 0) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 2, 1, tree, 1) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 3, 2, tree, 2) in + let _ = Stdlib.__FingerTree.__setDeepSuffixAt(ptr, suffixCount, node) in + // Copy middle + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, Stdlib.__FingerTree.__getDeepMiddle(tree)) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + else + // Suffix is full (4 nodes) - create NODE3 from first 3, push to middle + // Push NODE3(suffix[0], suffix[1], suffix[2]) to middle, keep suffix[3] + new node + let s0 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 0) in + let s1 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 1) in + let s2 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 2) in + let m0 = Stdlib.__FingerTree.__nodeMeasure(s0) in + let m1 = Stdlib.__FingerTree.__nodeMeasure(s1) in + let m2 = Stdlib.__FingerTree.__nodeMeasure(s2) in + let node3 = Stdlib.__FingerTree.__allocNode3(s0, s1, s2, m0 + m1 + m2) in + // Recursively push NODE3 to middle (same type parameter!) + let newMiddle = Stdlib.__FingerTree.__pushBackNode(Stdlib.__FingerTree.__getDeepMiddle(tree), node3) in + // Build new tree with same prefix, new middle, suffix=[suffix[3], node] + let s3 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 3) in + let prefixCount = Stdlib.__FingerTree.__getDeepPrefixCount(tree) in + let ptr = Stdlib.__FingerTree.__allocDeep(measure + nodeMeasure, prefixCount, 2) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 1, 0, tree, 0) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 2, 1, tree, 1) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 3, 2, tree, 2) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 4, 3, tree, 3) in + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, newMiddle) in + let _ = Stdlib.__FingerTree.__setDeepSuffixAt(ptr, 0, s3) in + let _ = Stdlib.__FingerTree.__setDeepSuffixAt(ptr, 1, node) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + else + // Unknown tag - just return singleton with node + Stdlib.__FingerTree.__allocSingle(node) + +// Add element to back (O(1) amortized) +def Stdlib.__FingerTree.pushBack(tree: List, elem: a) : List = + let leaf = Stdlib.__FingerTree.__allocLeaf(elem) in + Stdlib.__FingerTree.__pushBackNode(tree, leaf) + +// Helper: get element at index within a TreeNode +def Stdlib.__FingerTree.__getAtNode(node: List, index: Int64) : a = + let tag = Stdlib.__FingerTree.__getTag(node) in + if tag == Stdlib.__FingerTree.__TAG_LEAF() then + Stdlib.__FingerTree.__getLeafValue(node) + else if tag == Stdlib.__FingerTree.__TAG_NODE2() then + let c0 = Stdlib.__FingerTree.__node2GetChild(node, 0) in + let m0 = Stdlib.__FingerTree.__nodeMeasure(c0) in + if index < m0 then + Stdlib.__FingerTree.__getAtNode(c0, index) + else + let c1 = Stdlib.__FingerTree.__node2GetChild(node, 1) in + Stdlib.__FingerTree.__getAtNode(c1, index - m0) + else if tag == Stdlib.__FingerTree.__TAG_NODE3() then + let c0 = Stdlib.__FingerTree.__node3GetChild(node, 0) in + let m0 = Stdlib.__FingerTree.__nodeMeasure(c0) in + if index < m0 then + Stdlib.__FingerTree.__getAtNode(c0, index) + else + let c1 = Stdlib.__FingerTree.__node3GetChild(node, 1) in + let m1 = Stdlib.__FingerTree.__nodeMeasure(c1) in + if index < m0 + m1 then + Stdlib.__FingerTree.__getAtNode(c1, index - m0) + else + let c2 = Stdlib.__FingerTree.__node3GetChild(node, 2) in + Stdlib.__FingerTree.__getAtNode(c2, index - m0 - m1) + else + // Fallback - shouldn't happen + Stdlib.__FingerTree.__getLeafValue(node) + +// Get element at index (O(log n)) +def Stdlib.__FingerTree.getAt(tree: List, index: Int64) : Stdlib.Option.Option = + if index < 0 then None + else if Stdlib.__FingerTree.__isNull(tree) then None + else + let tag = Stdlib.__FingerTree.__getTag(tree) in + if tag == Stdlib.__FingerTree.__TAG_SINGLE() then + let node = Stdlib.__FingerTree.__getSingleElem(tree) in + let nodeMeasure = Stdlib.__FingerTree.__nodeMeasure(node) in + if index < nodeMeasure then + Some(Stdlib.__FingerTree.__getAtNode(node, index)) + else None + else if tag == Stdlib.__FingerTree.__TAG_DEEP() then + let measure = Stdlib.__FingerTree.__getDeepMeasure(tree) in + if index >= measure then None + else Stdlib.__FingerTree.__getAtDeep(tree, index) + else None + +// Internal: get element from Deep node at index +def Stdlib.__FingerTree.__getAtDeep(tree: List, index: Int64) : Stdlib.Option.Option = + let prefixCount = Stdlib.__FingerTree.__getDeepPrefixCount(tree) in + // Calculate prefix measure (sum of node measures in prefix) + let prefixMeasure = Stdlib.__FingerTree.__prefixMeasure(tree, prefixCount) in + if index < prefixMeasure then + // Element is in prefix - find which prefix node and index within it + Some(Stdlib.__FingerTree.__getAtPrefix(tree, prefixCount, index)) + else + let middle = Stdlib.__FingerTree.__getDeepMiddle(tree) in + let middleMeasure = Stdlib.__FingerTree.length(middle) in + if index < prefixMeasure + middleMeasure then + // Element is in middle + Stdlib.__FingerTree.getAt(middle, index - prefixMeasure) + else + // Element is in suffix + let indexInSuffix = index - prefixMeasure - middleMeasure in + let suffixCount = Stdlib.__FingerTree.__getDeepSuffixCount(tree) in + Some(Stdlib.__FingerTree.__getAtSuffix(tree, suffixCount, indexInSuffix)) + +// Helper: calculate total measure of prefix +def Stdlib.__FingerTree.__prefixMeasure(tree: List, prefixCount: Int64) : Int64 = + if prefixCount == 0 then 0 + else if prefixCount == 1 then + Stdlib.__FingerTree.__nodeMeasure(Stdlib.__FingerTree.__getDeepPrefixAt(tree, 0)) + else if prefixCount == 2 then + Stdlib.__FingerTree.__nodeMeasure(Stdlib.__FingerTree.__getDeepPrefixAt(tree, 0)) + + Stdlib.__FingerTree.__nodeMeasure(Stdlib.__FingerTree.__getDeepPrefixAt(tree, 1)) + else if prefixCount == 3 then + Stdlib.__FingerTree.__nodeMeasure(Stdlib.__FingerTree.__getDeepPrefixAt(tree, 0)) + + Stdlib.__FingerTree.__nodeMeasure(Stdlib.__FingerTree.__getDeepPrefixAt(tree, 1)) + + Stdlib.__FingerTree.__nodeMeasure(Stdlib.__FingerTree.__getDeepPrefixAt(tree, 2)) + else + Stdlib.__FingerTree.__nodeMeasure(Stdlib.__FingerTree.__getDeepPrefixAt(tree, 0)) + + Stdlib.__FingerTree.__nodeMeasure(Stdlib.__FingerTree.__getDeepPrefixAt(tree, 1)) + + Stdlib.__FingerTree.__nodeMeasure(Stdlib.__FingerTree.__getDeepPrefixAt(tree, 2)) + + Stdlib.__FingerTree.__nodeMeasure(Stdlib.__FingerTree.__getDeepPrefixAt(tree, 3)) + +// Helper: get element at index within prefix +def Stdlib.__FingerTree.__getAtPrefix(tree: List, prefixCount: Int64, index: Int64) : a = + let p0 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 0) in + let m0 = Stdlib.__FingerTree.__nodeMeasure(p0) in + if index < m0 then + Stdlib.__FingerTree.__getAtNode(p0, index) + else if prefixCount >= 2 then + let p1 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 1) in + let m1 = Stdlib.__FingerTree.__nodeMeasure(p1) in + if index < m0 + m1 then + Stdlib.__FingerTree.__getAtNode(p1, index - m0) + else if prefixCount >= 3 then + let p2 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 2) in + let m2 = Stdlib.__FingerTree.__nodeMeasure(p2) in + if index < m0 + m1 + m2 then + Stdlib.__FingerTree.__getAtNode(p2, index - m0 - m1) + else + let p3 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 3) in + Stdlib.__FingerTree.__getAtNode(p3, index - m0 - m1 - m2) + else + Stdlib.__FingerTree.__getAtNode(p1, index - m0) + else + Stdlib.__FingerTree.__getAtNode(p0, index) + +// Helper: get element at index within suffix +def Stdlib.__FingerTree.__getAtSuffix(tree: List, suffixCount: Int64, index: Int64) : a = + let s0 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 0) in + let m0 = Stdlib.__FingerTree.__nodeMeasure(s0) in + if index < m0 then + Stdlib.__FingerTree.__getAtNode(s0, index) + else if suffixCount >= 2 then + let s1 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 1) in + let m1 = Stdlib.__FingerTree.__nodeMeasure(s1) in + if index < m0 + m1 then + Stdlib.__FingerTree.__getAtNode(s1, index - m0) + else if suffixCount >= 3 then + let s2 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 2) in + let m2 = Stdlib.__FingerTree.__nodeMeasure(s2) in + if index < m0 + m1 + m2 then + Stdlib.__FingerTree.__getAtNode(s2, index - m0 - m1) + else + let s3 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 3) in + Stdlib.__FingerTree.__getAtNode(s3, index - m0 - m1 - m2) + else + Stdlib.__FingerTree.__getAtNode(s1, index - m0) + else + Stdlib.__FingerTree.__getAtNode(s0, index) + +// Helper: update an element at index within a TreeNode, returning a new TreeNode +def Stdlib.__FingerTree.__setAtNode(node: List, index: Int64, value: a) : List = + let tag = Stdlib.__FingerTree.__getTag(node) in + if tag == Stdlib.__FingerTree.__TAG_LEAF() then + // LEAF - just create new leaf with value + Stdlib.__FingerTree.__allocLeaf(value) + else if tag == Stdlib.__FingerTree.__TAG_NODE2() then + let c0 = Stdlib.__FingerTree.__node2GetChild(node, 0) in + let m0 = Stdlib.__FingerTree.__nodeMeasure(c0) in + if index < m0 then + // Update in first child + let newC0 = Stdlib.__FingerTree.__setAtNode(c0, index, value) in + let c1 = Stdlib.__FingerTree.__node2GetChild(node, 1) in + let m1 = Stdlib.__FingerTree.__nodeMeasure(c1) in + Stdlib.__FingerTree.__allocNode2(newC0, c1, m0 + m1) + else + // Update in second child + let c1 = Stdlib.__FingerTree.__node2GetChild(node, 1) in + let newC1 = Stdlib.__FingerTree.__setAtNode(c1, index - m0, value) in + let m1 = Stdlib.__FingerTree.__nodeMeasure(c1) in + Stdlib.__FingerTree.__allocNode2(c0, newC1, m0 + m1) + else if tag == Stdlib.__FingerTree.__TAG_NODE3() then + let c0 = Stdlib.__FingerTree.__node3GetChild(node, 0) in + let m0 = Stdlib.__FingerTree.__nodeMeasure(c0) in + if index < m0 then + // Update in first child + let newC0 = Stdlib.__FingerTree.__setAtNode(c0, index, value) in + let c1 = Stdlib.__FingerTree.__node3GetChild(node, 1) in + let c2 = Stdlib.__FingerTree.__node3GetChild(node, 2) in + let m1 = Stdlib.__FingerTree.__nodeMeasure(c1) in + let m2 = Stdlib.__FingerTree.__nodeMeasure(c2) in + Stdlib.__FingerTree.__allocNode3(newC0, c1, c2, m0 + m1 + m2) + else + let c1 = Stdlib.__FingerTree.__node3GetChild(node, 1) in + let m1 = Stdlib.__FingerTree.__nodeMeasure(c1) in + if index < m0 + m1 then + // Update in second child + let newC1 = Stdlib.__FingerTree.__setAtNode(c1, index - m0, value) in + let c2 = Stdlib.__FingerTree.__node3GetChild(node, 2) in + let m2 = Stdlib.__FingerTree.__nodeMeasure(c2) in + Stdlib.__FingerTree.__allocNode3(c0, newC1, c2, m0 + m1 + m2) + else + // Update in third child + let c2 = Stdlib.__FingerTree.__node3GetChild(node, 2) in + let newC2 = Stdlib.__FingerTree.__setAtNode(c2, index - m0 - m1, value) in + let m2 = Stdlib.__FingerTree.__nodeMeasure(c2) in + Stdlib.__FingerTree.__allocNode3(c0, c1, newC2, m0 + m1 + m2) + else + // Fallback - shouldn't happen + node + +// Set element at index (O(log n) - creates new tree with updated element) +def Stdlib.__FingerTree.setAt(tree: List, index: Int64, value: a) : List = + if index < 0 then tree + else if Stdlib.__FingerTree.__isNull(tree) then tree + else + let tag = Stdlib.__FingerTree.__getTag(tree) in + if tag == Stdlib.__FingerTree.__TAG_SINGLE() then + let node = Stdlib.__FingerTree.__getSingleElem(tree) in + let nodeMeasure = Stdlib.__FingerTree.__nodeMeasure(node) in + if index < nodeMeasure then + let newNode = Stdlib.__FingerTree.__setAtNode(node, index, value) in + Stdlib.__FingerTree.__allocSingle(newNode) + else tree + else if tag == Stdlib.__FingerTree.__TAG_DEEP() then + let measure = Stdlib.__FingerTree.__getDeepMeasure(tree) in + if index >= measure then tree + else Stdlib.__FingerTree.__setAtDeep(tree, index, value) + else tree + +// Helper: set element at index within prefix, returning the updated TreeNode at that position +def Stdlib.__FingerTree.__setAtPrefixGetNode(tree: List, prefixCount: Int64, index: Int64, value: a) : List = + let p0 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 0) in + let m0 = Stdlib.__FingerTree.__nodeMeasure(p0) in + if index < m0 then + Stdlib.__FingerTree.__setAtNode(p0, index, value) + else if prefixCount >= 2 then + let p1 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 1) in + let m1 = Stdlib.__FingerTree.__nodeMeasure(p1) in + if index < m0 + m1 then + Stdlib.__FingerTree.__setAtNode(p1, index - m0, value) + else if prefixCount >= 3 then + let p2 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 2) in + let m2 = Stdlib.__FingerTree.__nodeMeasure(p2) in + if index < m0 + m1 + m2 then + Stdlib.__FingerTree.__setAtNode(p2, index - m0 - m1, value) + else + let p3 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 3) in + Stdlib.__FingerTree.__setAtNode(p3, index - m0 - m1 - m2, value) + else + Stdlib.__FingerTree.__setAtNode(p1, index - m0, value) + else + Stdlib.__FingerTree.__setAtNode(p0, index, value) + +// Helper: find which prefix node contains the index (returns node index 0-3) +def Stdlib.__FingerTree.__findPrefixNodeIdx(tree: List, prefixCount: Int64, index: Int64) : Int64 = + let p0 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 0) in + let m0 = Stdlib.__FingerTree.__nodeMeasure(p0) in + if index < m0 then 0 + else if prefixCount >= 2 then + let p1 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 1) in + let m1 = Stdlib.__FingerTree.__nodeMeasure(p1) in + if index < m0 + m1 then 1 + else if prefixCount >= 3 then + let p2 = Stdlib.__FingerTree.__getDeepPrefixAt(tree, 2) in + let m2 = Stdlib.__FingerTree.__nodeMeasure(p2) in + if index < m0 + m1 + m2 then 2 + else 3 + else 1 + else 0 + +// Helper: find which suffix node contains the index (returns node index 0-3) +def Stdlib.__FingerTree.__findSuffixNodeIdx(tree: List, suffixCount: Int64, index: Int64) : Int64 = + let s0 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 0) in + let m0 = Stdlib.__FingerTree.__nodeMeasure(s0) in + if index < m0 then 0 + else if suffixCount >= 2 then + let s1 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 1) in + let m1 = Stdlib.__FingerTree.__nodeMeasure(s1) in + if index < m0 + m1 then 1 + else if suffixCount >= 3 then + let s2 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 2) in + let m2 = Stdlib.__FingerTree.__nodeMeasure(s2) in + if index < m0 + m1 + m2 then 2 + else 3 + else 1 + else 0 + +// Helper: set element at index within suffix, returning the updated TreeNode +def Stdlib.__FingerTree.__setAtSuffixGetNode(tree: List, suffixCount: Int64, index: Int64, value: a) : List = + let s0 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 0) in + let m0 = Stdlib.__FingerTree.__nodeMeasure(s0) in + if index < m0 then + Stdlib.__FingerTree.__setAtNode(s0, index, value) + else if suffixCount >= 2 then + let s1 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 1) in + let m1 = Stdlib.__FingerTree.__nodeMeasure(s1) in + if index < m0 + m1 then + Stdlib.__FingerTree.__setAtNode(s1, index - m0, value) + else if suffixCount >= 3 then + let s2 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 2) in + let m2 = Stdlib.__FingerTree.__nodeMeasure(s2) in + if index < m0 + m1 + m2 then + Stdlib.__FingerTree.__setAtNode(s2, index - m0 - m1, value) + else + let s3 = Stdlib.__FingerTree.__getDeepSuffixAt(tree, 3) in + Stdlib.__FingerTree.__setAtNode(s3, index - m0 - m1 - m2, value) + else + Stdlib.__FingerTree.__setAtNode(s1, index - m0, value) + else + Stdlib.__FingerTree.__setAtNode(s0, index, value) + +// Internal: set element in Deep node at index +def Stdlib.__FingerTree.__setAtDeep(tree: List, index: Int64, value: a) : List = + let prefixCount = Stdlib.__FingerTree.__getDeepPrefixCount(tree) in + let suffixCount = Stdlib.__FingerTree.__getDeepSuffixCount(tree) in + let measure = Stdlib.__FingerTree.__getDeepMeasure(tree) in + let prefixMeasure = Stdlib.__FingerTree.__prefixMeasure(tree, prefixCount) in + if index < prefixMeasure then + // Element is in prefix - find node, update it, rebuild tree + let nodeIdx = Stdlib.__FingerTree.__findPrefixNodeIdx(tree, prefixCount, index) in + let newNode = Stdlib.__FingerTree.__setAtPrefixGetNode(tree, prefixCount, index, value) in + let ptr = Stdlib.__FingerTree.__allocDeep(measure, prefixCount, suffixCount) in + // Copy prefix with the updated node at nodeIdx + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtOrIf(ptr, prefixCount >= 1, 0, tree, 0, nodeIdx == 0, newNode) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtOrIf(ptr, prefixCount >= 2, 1, tree, 1, nodeIdx == 1, newNode) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtOrIf(ptr, prefixCount >= 3, 2, tree, 2, nodeIdx == 2, newNode) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtOrIf(ptr, prefixCount >= 4, 3, tree, 3, nodeIdx == 3, newNode) in + // Copy suffix unchanged + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 1, 0, tree, 0) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 2, 1, tree, 1) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 3, 2, tree, 2) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 4, 3, tree, 3) in + // Copy middle unchanged + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, Stdlib.__FingerTree.__getDeepMiddle(tree)) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + else + let middle = Stdlib.__FingerTree.__getDeepMiddle(tree) in + let middleMeasure = Stdlib.__FingerTree.length(middle) in + if index < prefixMeasure + middleMeasure then + // Element is in middle - recursively update middle + let newMiddle = Stdlib.__FingerTree.setAt(middle, index - prefixMeasure, value) in + let ptr = Stdlib.__FingerTree.__allocDeep(measure, prefixCount, suffixCount) in + // Copy prefix unchanged + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 1, 0, tree, 0) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 2, 1, tree, 1) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 3, 2, tree, 2) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 4, 3, tree, 3) in + // Copy suffix unchanged + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 1, 0, tree, 0) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 2, 1, tree, 1) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 3, 2, tree, 2) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, suffixCount >= 4, 3, tree, 3) in + // Set updated middle + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, newMiddle) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + else + // Element is in suffix + let indexInSuffix = index - prefixMeasure - middleMeasure in + let nodeIdx = Stdlib.__FingerTree.__findSuffixNodeIdx(tree, suffixCount, indexInSuffix) in + let newNode = Stdlib.__FingerTree.__setAtSuffixGetNode(tree, suffixCount, indexInSuffix, value) in + let ptr = Stdlib.__FingerTree.__allocDeep(measure, prefixCount, suffixCount) in + // Copy prefix unchanged + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 1, 0, tree, 0) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 2, 1, tree, 1) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 3, 2, tree, 2) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, prefixCount >= 4, 3, tree, 3) in + // Copy suffix with the updated node at nodeIdx + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtOrIf(ptr, suffixCount >= 1, 0, tree, 0, nodeIdx == 0, newNode) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtOrIf(ptr, suffixCount >= 2, 1, tree, 1, nodeIdx == 1, newNode) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtOrIf(ptr, suffixCount >= 3, 2, tree, 2, nodeIdx == 2, newNode) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtOrIf(ptr, suffixCount >= 4, 3, tree, 3, nodeIdx == 3, newNode) in + // Copy middle unchanged + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, Stdlib.__FingerTree.__getDeepMiddle(tree)) in + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + +// Convert list to FingerTree +def Stdlib.__FingerTree.fromList(list: List) : List = + Stdlib.__FingerTree.__fromListHelper(list, Stdlib.__FingerTree.empty()) + +def Stdlib.__FingerTree.__fromListHelper(list: List, acc: List) : List = + match list with + | [] -> acc + | [h, ...t] -> Stdlib.__FingerTree.__fromListHelper(t, Stdlib.__FingerTree.pushBack(acc, h)) + +// Helper: create NODE2 from two nodes and push to tree +def Stdlib.__FingerTree.__pushMiddleNode2(tree: List, n0: List, n1: List) : List = + let m0 = Stdlib.__FingerTree.__nodeMeasure(n0) in + let m1 = Stdlib.__FingerTree.__nodeMeasure(n1) in + let node2 = Stdlib.__FingerTree.__allocNode2(n0, n1, m0 + m1) in + Stdlib.__FingerTree.__pushBackNode(tree, node2) + +// Helper: create NODE3 from three nodes and push to tree +def Stdlib.__FingerTree.__pushMiddleNode3(tree: List, n0: List, n1: List, n2: List) : List = + let m0 = Stdlib.__FingerTree.__nodeMeasure(n0) in + let m1 = Stdlib.__FingerTree.__nodeMeasure(n1) in + let m2 = Stdlib.__FingerTree.__nodeMeasure(n2) in + let node3 = Stdlib.__FingerTree.__allocNode3(n0, n1, n2, m0 + m1 + m2) in + Stdlib.__FingerTree.__pushBackNode(tree, node3) + +// Helper: get i-th node from combined sf++pr, where sf comes from t1's suffix and pr from t2's prefix +// i: 0-7, sfCount: number of suffix nodes +def Stdlib.__FingerTree.__getNodeAt(t1: List, t2: List, sfCount: Int64, i: Int64) : List = + if i < sfCount then + Stdlib.__FingerTree.__getDeepSuffixAt(t1, i) + else + Stdlib.__FingerTree.__getDeepPrefixAt(t2, i - sfCount) + +// Helper: add 2 middle nodes as NODE2 +def Stdlib.__FingerTree.__add2Nodes(tree: List, t1: List, t2: List, sfCount: Int64) : List = + let n0 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 0) in + let n1 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 1) in + Stdlib.__FingerTree.__pushMiddleNode2(tree, n0, n1) + +// Helper: add 3 middle nodes as NODE3 +def Stdlib.__FingerTree.__add3Nodes(tree: List, t1: List, t2: List, sfCount: Int64) : List = + let n0 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 0) in + let n1 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 1) in + let n2 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 2) in + Stdlib.__FingerTree.__pushMiddleNode3(tree, n0, n1, n2) + +// Helper: add 4 middle nodes as NODE2 + NODE2 +def Stdlib.__FingerTree.__add4Nodes(tree: List, t1: List, t2: List, sfCount: Int64) : List = + let n0 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 0) in + let n1 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 1) in + let n2 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 2) in + let n3 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 3) in + let tree1 = Stdlib.__FingerTree.__pushMiddleNode2(tree, n0, n1) in + Stdlib.__FingerTree.__pushMiddleNode2(tree1, n2, n3) + +// Helper: add 5 middle nodes as NODE3 + NODE2 +def Stdlib.__FingerTree.__add5Nodes(tree: List, t1: List, t2: List, sfCount: Int64) : List = + let n0 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 0) in + let n1 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 1) in + let n2 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 2) in + let n3 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 3) in + let n4 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 4) in + let tree1 = Stdlib.__FingerTree.__pushMiddleNode3(tree, n0, n1, n2) in + Stdlib.__FingerTree.__pushMiddleNode2(tree1, n3, n4) + +// Helper: add 6 middle nodes as NODE3 + NODE3 +def Stdlib.__FingerTree.__add6Nodes(tree: List, t1: List, t2: List, sfCount: Int64) : List = + let n0 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 0) in + let n1 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 1) in + let n2 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 2) in + let n3 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 3) in + let n4 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 4) in + let n5 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 5) in + let tree1 = Stdlib.__FingerTree.__pushMiddleNode3(tree, n0, n1, n2) in + Stdlib.__FingerTree.__pushMiddleNode3(tree1, n3, n4, n5) + +// Helper: add 7 middle nodes as NODE3 + NODE2 + NODE2 +def Stdlib.__FingerTree.__add7Nodes(tree: List, t1: List, t2: List, sfCount: Int64) : List = + let n0 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 0) in + let n1 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 1) in + let n2 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 2) in + let n3 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 3) in + let n4 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 4) in + let n5 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 5) in + let n6 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 6) in + let tree1 = Stdlib.__FingerTree.__pushMiddleNode3(tree, n0, n1, n2) in + let tree2 = Stdlib.__FingerTree.__pushMiddleNode2(tree1, n3, n4) in + Stdlib.__FingerTree.__pushMiddleNode2(tree2, n5, n6) + +// Helper: add 8 middle nodes as NODE3 + NODE3 + NODE2 +def Stdlib.__FingerTree.__add8Nodes(tree: List, t1: List, t2: List, sfCount: Int64) : List = + let n0 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 0) in + let n1 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 1) in + let n2 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 2) in + let n3 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 3) in + let n4 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 4) in + let n5 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 5) in + let n6 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 6) in + let n7 = Stdlib.__FingerTree.__getNodeAt(t1, t2, sfCount, 7) in + let tree1 = Stdlib.__FingerTree.__pushMiddleNode3(tree, n0, n1, n2) in + let tree2 = Stdlib.__FingerTree.__pushMiddleNode3(tree1, n3, n4, n5) in + Stdlib.__FingerTree.__pushMiddleNode2(tree2, n6, n7) + +// Helper: add middle nodes to a tree based on total count (2-8) +def Stdlib.__FingerTree.__addMiddleNodes(tree: List, t1: List, t2: List, sfCount: Int64, total: Int64) : List = + if total == 2 then Stdlib.__FingerTree.__add2Nodes(tree, t1, t2, sfCount) + else if total == 3 then Stdlib.__FingerTree.__add3Nodes(tree, t1, t2, sfCount) + else if total == 4 then Stdlib.__FingerTree.__add4Nodes(tree, t1, t2, sfCount) + else if total == 5 then Stdlib.__FingerTree.__add5Nodes(tree, t1, t2, sfCount) + else if total == 6 then Stdlib.__FingerTree.__add6Nodes(tree, t1, t2, sfCount) + else if total == 7 then Stdlib.__FingerTree.__add7Nodes(tree, t1, t2, sfCount) + else Stdlib.__FingerTree.__add8Nodes(tree, t1, t2, sfCount) + +// Helper: concat two DEEP trees - O(log min(n,m)) +def Stdlib.__FingerTree.__concatDeep(t1: List, t2: List) : List = + // Both t1 and t2 are DEEP + // Result: Deep(prefix of t1, concat(m1 + nodes(sf1 ++ pr2) + m2), suffix of t2) + + let pr1Count = Stdlib.__FingerTree.__getDeepPrefixCount(t1) in + let sf1Count = Stdlib.__FingerTree.__getDeepSuffixCount(t1) in + let m1 = Stdlib.__FingerTree.__getDeepMiddle(t1) in + + let pr2Count = Stdlib.__FingerTree.__getDeepPrefixCount(t2) in + let sf2Count = Stdlib.__FingerTree.__getDeepSuffixCount(t2) in + let m2 = Stdlib.__FingerTree.__getDeepMiddle(t2) in + + // Create middle nodes (NODE2/NODE3 groups) and push to m1 + let totalMiddle = sf1Count + pr2Count in + let m1WithMiddle = Stdlib.__FingerTree.__addMiddleNodes(m1, t1, t2, sf1Count, totalMiddle) in + + // Recursively concat with m2 + let newMiddle = Stdlib.__FingerTree.concat(m1WithMiddle, m2) in + + // Build final tree: Deep(prefix of t1, newMiddle, suffix of t2) + let measure1 = Stdlib.__FingerTree.__getDeepMeasure(t1) in + let measure2 = Stdlib.__FingerTree.__getDeepMeasure(t2) in + let totalMeasure = measure1 + measure2 in + + let ptr = Stdlib.__FingerTree.__allocDeep(totalMeasure, pr1Count, sf2Count) in + + // Copy prefix from t1 + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, pr1Count >= 1, 0, t1, 0) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, pr1Count >= 2, 1, t1, 1) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, pr1Count >= 3, 2, t1, 2) in + let _ = Stdlib.__FingerTree.__copyDeepPrefixAtIf(ptr, pr1Count >= 4, 3, t1, 3) in + + // Set middle + let _ = Stdlib.__FingerTree.__setDeepMiddle(ptr, newMiddle) in + + // Copy suffix from t2 + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, sf2Count >= 1, 0, t2, 0) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, sf2Count >= 2, 1, t2, 1) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, sf2Count >= 3, 2, t2, 2) in + let _ = Stdlib.__FingerTree.__copyDeepSuffixAtIf(ptr, sf2Count >= 4, 3, t2, 3) in + + Stdlib.__FingerTree.__fromRawPtr(ptr, Stdlib.__FingerTree.__TAG_DEEP()) + +// Concat two FingerTrees - O(log min(n,m)) +def Stdlib.__FingerTree.concat(t1: List, t2: List) : List = + if Stdlib.__FingerTree.isEmpty(t1) then t2 + else if Stdlib.__FingerTree.isEmpty(t2) then t1 + else + let tag1 = Stdlib.__FingerTree.__getTag(t1) in + let tag2 = Stdlib.__FingerTree.__getTag(t2) in + if tag1 == Stdlib.__FingerTree.__TAG_SINGLE() then + // t1 is Single - push its node to front of t2 + let node = Stdlib.__FingerTree.__getSingleElem(t1) in + Stdlib.__FingerTree.__pushNode(t2, node) + else if tag2 == Stdlib.__FingerTree.__TAG_SINGLE() then + // t2 is Single - push its node to back of t1 + let node = Stdlib.__FingerTree.__getSingleElem(t2) in + Stdlib.__FingerTree.__pushBackNode(t1, node) + else if tag1 == Stdlib.__FingerTree.__TAG_DEEP() then + if tag2 == Stdlib.__FingerTree.__TAG_DEEP() then + // Both are Deep - use the full algorithm + Stdlib.__FingerTree.__concatDeep(t1, t2) + else t1 + else t1 diff --git a/backend/src/LibCompiler/stdlib/__HAMT.dark b/backend/src/LibCompiler/stdlib/__HAMT.dark new file mode 100644 index 0000000000..68c5200f82 --- /dev/null +++ b/backend/src/LibCompiler/stdlib/__HAMT.dark @@ -0,0 +1,741 @@ +// __HAMT.dark - Stdlib.__HAMT definitions +// +// Internal HAMT implementation details for Stdlib.Dict. + +// Stdlib.__HAMT - Internal Hash Array Mapped Trie helpers +// ============================================================================= + +def Stdlib.__HAMT.__hashChunk(hash: Int64, level: Int64) : Int64 = + (hash >> (level * 6)) & 63 + +// Check if bit is set in bitmap +def Stdlib.__HAMT.__hasBit(bitmap: Int64, bit: Int64) : Bool = + ((bitmap >> bit) & 1) == 1 + +// Count bits below position in bitmap (for compressed array index) +def Stdlib.__HAMT.__childIndex(bitmap: Int64, bit: Int64) : Int64 = + Stdlib.Int64.popcount(bitmap & ((1 << bit) - 1)) + +// Set a bit in bitmap +def Stdlib.__HAMT.__setBit(bitmap: Int64, bit: Int64) : Int64 = + bitmap ^ (1 << bit) + +// Clear a bit in bitmap (for remove) +// Note: ~x = (-1) ^ x (XOR with all ones) +def Stdlib.__HAMT.__clearBit(bitmap: Int64, bit: Int64) : Int64 = + bitmap & (((0 - 1)) ^ (1 << bit)) + +// ============================================================================= +// Pointer tagging helpers +// ============================================================================= +// We use the low 2 bits of pointers for tags (since 8-byte alignment gives us 3 free bits) +// Tag 0: Empty (NULL) +// Tag 1: Internal node (bitmap + children) +// Tag 2: Leaf node (key + value) +// Tag 3: Collision node (multiple entries with same hash prefix) - not yet implemented + +// Get tag from a tagged pointer +def Stdlib.__HAMT.__getTag(dict: Dict) : Int64 = + __dict_get_tag(dict) + +// Clear tag bits to get actual pointer (returns RawPtr) +def Stdlib.__HAMT.__clearTag(dict: Dict) : RawPtr = + __dict_to_rawptr(dict) + +// Set tag on a pointer to create a Dict +def Stdlib.__HAMT.__setTag(ptr: RawPtr, tag: Int64) : Dict = + __rawptr_to_dict(ptr, tag) + +// Allocate a leaf node: [key:8][value:8] = 16 bytes +def Stdlib.__HAMT.__allocLeaf(key: k, value: v) : Dict = + let ptr = __raw_alloc(16) in + let _ = __raw_set(ptr, 0, key) in + let _ = __raw_set(ptr, 8, value) in + Stdlib.__HAMT.__setTag(ptr, 2) + +// Allocate an internal node: [bitmap:8][children...] = 8 + 8*numChildren bytes +def Stdlib.__HAMT.__allocInternal(bitmap: Int64, numChildren: Int64) : RawPtr = + let ptr = __raw_alloc(8 + (numChildren * 8)) in + let _ = __raw_set(ptr, 0, bitmap) in + ptr + +// ============================================================================= +// Collision Node Functions (Tag 3) +// ============================================================================= +// Collision node layout: [count:8][key1:8][val1:8][key2:8][val2:8]... +// Used when multiple keys have identical hash values through all levels + +// Allocate a collision node with 2 initial entries +def Stdlib.__HAMT.__allocCollision(key1: k, val1: v, key2: k, val2: v) : Dict = + // 8 bytes for count + 2 * 16 bytes for entries = 40 bytes + let ptr = __raw_alloc(40) in + let _ = __raw_set(ptr, 0, 2) in // count = 2 + let _ = __raw_set(ptr, 8, key1) in + let _ = __raw_set(ptr, 16, val1) in + let _ = __raw_set(ptr, 24, key2) in + let _ = __raw_set(ptr, 32, val2) in + Stdlib.__HAMT.__setTag(ptr, 3) + +// Get count from collision node +def Stdlib.__HAMT.__collisionCount(ptr: RawPtr) : Int64 = + __raw_get(ptr, 0) + +// Find key in collision node, returns index (0-based) or -1 if not found +def Stdlib.__HAMT.__findInCollision(ptr: RawPtr, key: k, count: Int64, i: Int64) : Int64 = + if i >= count then -1 + else + let offset = 8 + (i * 16) in + let storedKey = __raw_get(ptr, offset) in + if __key_eq(storedKey, key) then i + else Stdlib.__HAMT.__findInCollision(ptr, key, count, i + 1) + +// Get value from collision node at index +def Stdlib.__HAMT.__getCollisionValue(ptr: RawPtr, idx: Int64) : v = + let offset = 8 + (idx * 16) + 8 in + __raw_get(ptr, offset) + +// Get key from collision node at index +def Stdlib.__HAMT.__getCollisionKey(ptr: RawPtr, idx: Int64) : k = + let offset = 8 + (idx * 16) in + __raw_get(ptr, offset) + +// Lookup in collision node +def Stdlib.__HAMT.__getFromCollision(ptr: RawPtr, key: k) : Stdlib.Option.Option = + let count = Stdlib.__HAMT.__collisionCount(ptr) in + let idx = Stdlib.__HAMT.__findInCollision(ptr, key, count, 0) in + if idx >= 0 then Some(Stdlib.__HAMT.__getCollisionValue(ptr, idx)) + else None + +// Copy collision entries except one index +def Stdlib.__HAMT.__copyCollisionExcept(oldPtr: RawPtr, newPtr: RawPtr, count: Int64, exceptIdx: Int64, i: Int64, destI: Int64) : Unit = + if i >= count then () + else if i == exceptIdx then + Stdlib.__HAMT.__copyCollisionExcept(oldPtr, newPtr, count, exceptIdx, i + 1, destI) + else + let srcOffset = 8 + (i * 16) in + let destOffset = 8 + (destI * 16) in + let key = __raw_get(oldPtr, srcOffset) in + let value = __raw_get(oldPtr, srcOffset + 8) in + let _ = __raw_set(newPtr, destOffset, key) in + let _ = __raw_set(newPtr, destOffset + 8, value) in + Stdlib.__HAMT.__copyCollisionExcept(oldPtr, newPtr, count, exceptIdx, i + 1, destI + 1) + +// Copy all collision entries +def Stdlib.__HAMT.__copyAllCollision(oldPtr: RawPtr, newPtr: RawPtr, count: Int64, i: Int64) : Unit = + if i >= count then () + else + let offset = 8 + (i * 16) in + let key = __raw_get(oldPtr, offset) in + let value = __raw_get(oldPtr, offset + 8) in + let _ = __raw_set(newPtr, offset, key) in + let _ = __raw_set(newPtr, offset + 8, value) in + Stdlib.__HAMT.__copyAllCollision(oldPtr, newPtr, count, i + 1) + +// Update or add entry in collision node +def Stdlib.__HAMT.__setInCollision(ptr: RawPtr, key: k, value: v) : Dict = + let count = Stdlib.__HAMT.__collisionCount(ptr) in + let idx = Stdlib.__HAMT.__findInCollision(ptr, key, count, 0) in + if idx >= 0 then + // Key exists - create new collision node with updated value + let newPtr = __raw_alloc(8 + (count * 16)) in + let _ = __raw_set(newPtr, 0, count) in + let _ = Stdlib.__HAMT.__copyAllCollision(ptr, newPtr, count, 0) in + let updateOffset = 8 + (idx * 16) + 8 in + let _ = __raw_set(newPtr, updateOffset, value) in + Stdlib.__HAMT.__setTag(newPtr, 3) + else + // Key doesn't exist - create new collision node with added entry + let newCount = count + 1 in + let newPtr = __raw_alloc(8 + (newCount * 16)) in + let _ = __raw_set(newPtr, 0, newCount) in + let _ = Stdlib.__HAMT.__copyAllCollision(ptr, newPtr, count, 0) in + let newOffset = 8 + (count * 16) in + let _ = __raw_set(newPtr, newOffset, key) in + let _ = __raw_set(newPtr, newOffset + 8, value) in + Stdlib.__HAMT.__setTag(newPtr, 3) + +// Remove entry from collision node +def Stdlib.__HAMT.__removeFromCollision(ptr: RawPtr, key: k) : Dict = + let count = Stdlib.__HAMT.__collisionCount(ptr) in + let idx = Stdlib.__HAMT.__findInCollision(ptr, key, count, 0) in + if idx < 0 then + // Key not found - return unchanged + Stdlib.__HAMT.__setTag(ptr, 3) + else if count == 2 then + // Removing one of two entries - collapse to leaf + let otherIdx = if idx == 0 then 1 else 0 in + let otherKey = Stdlib.__HAMT.__getCollisionKey(ptr, otherIdx) in + let otherValue = Stdlib.__HAMT.__getCollisionValue(ptr, otherIdx) in + Stdlib.__HAMT.__allocLeaf(otherKey, otherValue) + else + // Remove entry - create smaller collision node + let newCount = count - 1 in + let newPtr = __raw_alloc(8 + (newCount * 16)) in + let _ = __raw_set(newPtr, 0, newCount) in + let _ = Stdlib.__HAMT.__copyCollisionExcept(ptr, newPtr, count, idx, 0, 0) in + Stdlib.__HAMT.__setTag(newPtr, 3) + +// Check if key exists in collision node +def Stdlib.__HAMT.__containsInCollision(ptr: RawPtr, key: k) : Bool = + let count = Stdlib.__HAMT.__collisionCount(ptr) in + let idx = Stdlib.__HAMT.__findInCollision(ptr, key, count, 0) in + idx >= 0 + +// Collect keys from collision node +def Stdlib.__HAMT.__collectCollisionKeys(ptr: RawPtr, count: Int64, i: Int64, acc: List) : List = + if i >= count then acc + else + let key = Stdlib.__HAMT.__getCollisionKey(ptr, i) in + Stdlib.__HAMT.__collectCollisionKeys(ptr, count, i + 1, [key, ...acc]) + +// Collect values from collision node +def Stdlib.__HAMT.__collectCollisionValues(ptr: RawPtr, count: Int64, i: Int64, acc: List) : List = + if i >= count then acc + else + let value = Stdlib.__HAMT.__getCollisionValue(ptr, i) in + Stdlib.__HAMT.__collectCollisionValues(ptr, count, i + 1, [value, ...acc]) + +// Collect entries from collision node +def Stdlib.__HAMT.__collectCollisionEntries(ptr: RawPtr, count: Int64, i: Int64, acc: List<(k, v)>) : List<(k, v)> = + if i >= count then acc + else + let key = Stdlib.__HAMT.__getCollisionKey(ptr, i) in + let value = Stdlib.__HAMT.__getCollisionValue(ptr, i) in + Stdlib.__HAMT.__collectCollisionEntries(ptr, count, i + 1, [(key, value), ...acc]) + +// Fold over collision node entries +def Stdlib.__HAMT.__foldCollision(ptr: RawPtr, count: Int64, i: Int64, acc: a, f: (a, k, v) -> a) : a = + if i >= count then acc + else + let key = Stdlib.__HAMT.__getCollisionKey(ptr, i) in + let value = Stdlib.__HAMT.__getCollisionValue(ptr, i) in + Stdlib.__HAMT.__foldCollision(ptr, count, i + 1, f(acc, key, value), f) + +// Map over collision node entries +def Stdlib.__HAMT.__mapCollision(ptr: RawPtr, count: Int64, f: (k, v) -> w) : Dict = + // Collision nodes have >= 2 entries, so we can safely get key0/key1 + let key0 = Stdlib.__HAMT.__getCollisionKey(ptr, 0) in + let val0 = Stdlib.__HAMT.__getCollisionValue(ptr, 0) in + let key1 = Stdlib.__HAMT.__getCollisionKey(ptr, 1) in + let val1 = Stdlib.__HAMT.__getCollisionValue(ptr, 1) in + let newVal0 = f(key0, val0) in + let newVal1 = f(key1, val1) in + let result = Stdlib.__HAMT.__allocCollision(key0, newVal0, key1, newVal1) in + Stdlib.__HAMT.__mapCollisionRest(ptr, Stdlib.__HAMT.__clearTag(result), count, 2, f) + +def Stdlib.__HAMT.__mapCollisionRest(oldPtr: RawPtr, newPtr: RawPtr, count: Int64, i: Int64, f: (k, v) -> w) : Dict = + if i >= count then Stdlib.__HAMT.__setTag(newPtr, 3) + else + // For additional entries beyond first 2, we need to add them + // This is a simplification - we use setInCollision which handles growing + let key = Stdlib.__HAMT.__getCollisionKey(oldPtr, i) in + let value = Stdlib.__HAMT.__getCollisionValue(oldPtr, i) in + let newValue = f(key, value) in + let newNode = Stdlib.__HAMT.__setInCollision(newPtr, key, newValue) in + Stdlib.__HAMT.__mapCollisionRest(oldPtr, Stdlib.__HAMT.__clearTag(newNode), count, i + 1, f) + +// ============================================================================= +// Dict.empty - returns an empty dictionary +// ============================================================================= +// Empty is represented as 0 (NULL with tag 0) +def Stdlib.__HAMT.__getHelper(node: Dict, key: k, keyHash: Int64, level: Int64) : Stdlib.Option.Option = + if __dict_is_null(node) then + None + else + let tag = Stdlib.__HAMT.__getTag(node) in + let ptr = Stdlib.__HAMT.__clearTag(node) in + if tag == 2 then + // Leaf node + let storedKey = __raw_get(ptr, 0) in + if __key_eq(storedKey, key) then + Some(__raw_get(ptr, 8)) + else + None + else if tag == 1 then + // Internal node + let chunk = Stdlib.__HAMT.__hashChunk(keyHash, level) in + let bitmap = __raw_get(ptr, 0) in + if Stdlib.__HAMT.__hasBit(bitmap, chunk) then + let idx = Stdlib.__HAMT.__childIndex(bitmap, chunk) in + let child = __raw_get>(ptr, 8 + (idx * 8)) in + Stdlib.__HAMT.__getHelper(child, key, keyHash, level + 1) + else + None + else if tag == 3 then + // Collision node - linear search + Stdlib.__HAMT.__getFromCollision(ptr, key) + else + // Unknown tag + None + +def Stdlib.__HAMT.__setHelper(node: Dict, key: k, keyHash: Int64, value: v, level: Int64) : Dict = + if __dict_is_null(node) then + // Empty - create a new leaf + Stdlib.__HAMT.__allocLeaf(key, value) + else + let tag = Stdlib.__HAMT.__getTag(node) in + let ptr = Stdlib.__HAMT.__clearTag(node) in + if tag == 2 then + // Leaf node - check if same key or need to expand + let storedKey = __raw_get(ptr, 0) in + if __key_eq(storedKey, key) then + // Same key - replace value (create new leaf) + Stdlib.__HAMT.__allocLeaf(key, value) + else + // Different key - need to expand to internal node + let storedValue = __raw_get(ptr, 8) in + let storedKeyHash = __hash(storedKey) in + Stdlib.__HAMT.__expandLeaf(storedKey, storedKeyHash, storedValue, key, keyHash, value, level) + else if tag == 1 then + // Internal node - recurse into appropriate child + let chunk = Stdlib.__HAMT.__hashChunk(keyHash, level) in + let bitmap = __raw_get(ptr, 0) in + let idx = Stdlib.__HAMT.__childIndex(bitmap, chunk) in + if Stdlib.__HAMT.__hasBit(bitmap, chunk) then + // Child exists - update it + let oldChild = __raw_get>(ptr, 8 + (idx * 8)) in + let newChild = Stdlib.__HAMT.__setHelper(oldChild, key, keyHash, value, level + 1) in + Stdlib.__HAMT.__copyInternalWithUpdate(ptr, bitmap, idx, newChild) + else + // No child at this position - insert new leaf + let newLeaf = Stdlib.__HAMT.__allocLeaf(key, value) in + let newBitmap = Stdlib.__HAMT.__setBit(bitmap, chunk) in + Stdlib.__HAMT.__copyInternalWithInsert(ptr, bitmap, newBitmap, idx, newLeaf) + else if tag == 3 then + // Collision node - update or add + Stdlib.__HAMT.__setInCollision(ptr, key, value) + else + // Unknown tag - return node unchanged + node + +// Expand a leaf to an internal node when two keys collide +def Stdlib.__HAMT.__expandLeaf(key1: k, key1Hash: Int64, val1: v, key2: k, key2Hash: Int64, val2: v, level: Int64) : Dict = + let chunk1 = Stdlib.__HAMT.__hashChunk(key1Hash, level) in + let chunk2 = Stdlib.__HAMT.__hashChunk(key2Hash, level) in + if chunk1 == chunk2 then + // Same chunk - need to go deeper + if level >= 10 then + // Max depth reached - create collision node + Stdlib.__HAMT.__allocCollision(key1, val1, key2, val2) + else + // Create internal node with single child (recursive case) + let child = Stdlib.__HAMT.__expandLeaf(key1, key1Hash, val1, key2, key2Hash, val2, level + 1) in + let bitmap = Stdlib.__HAMT.__setBit(0, chunk1) in + let newNode = Stdlib.__HAMT.__allocInternal(bitmap, 1) in + let _ = __raw_set>(newNode, 8, child) in + Stdlib.__HAMT.__setTag(newNode, 1) + else + // Different chunks - create internal node with both leaves + let leaf1 = Stdlib.__HAMT.__allocLeaf(key1, val1) in + let leaf2 = Stdlib.__HAMT.__allocLeaf(key2, val2) in + let bitmap = Stdlib.__HAMT.__setBit(Stdlib.__HAMT.__setBit(0, chunk1), chunk2) in + let newNode = Stdlib.__HAMT.__allocInternal(bitmap, 2) in + // Store children in order of their chunks + if chunk1 < chunk2 then + let _ = __raw_set>(newNode, 8, leaf1) in + let _ = __raw_set>(newNode, 16, leaf2) in + Stdlib.__HAMT.__setTag(newNode, 1) + else + let _ = __raw_set>(newNode, 8, leaf2) in + let _ = __raw_set>(newNode, 16, leaf1) in + Stdlib.__HAMT.__setTag(newNode, 1) + +// Copy internal node with one child updated +def Stdlib.__HAMT.__copyInternalWithUpdate(oldPtr: RawPtr, bitmap: Int64, updateIdx: Int64, newChild: Dict) : Dict = + let numChildren = Stdlib.Int64.popcount(bitmap) in + let newNode = Stdlib.__HAMT.__allocInternal(bitmap, numChildren) in + // Copy all children, replacing the one at updateIdx + Stdlib.__HAMT.__copyChildren(oldPtr, newNode, numChildren, updateIdx, newChild, 0) + +// Copy children from old node to new node, updating one +def Stdlib.__HAMT.__copyChildren(oldPtr: RawPtr, newPtr: RawPtr, numChildren: Int64, updateIdx: Int64, newChild: Dict, i: Int64) : Dict = + if i >= numChildren then + Stdlib.__HAMT.__setTag(newPtr, 1) + else + let offset = 8 + (i * 8) in + if i == updateIdx then + let _ = __raw_set>(newPtr, offset, newChild) in + Stdlib.__HAMT.__copyChildren(oldPtr, newPtr, numChildren, updateIdx, newChild, i + 1) + else + let child = __raw_get>(oldPtr, offset) in + let _ = __raw_set>(newPtr, offset, child) in + Stdlib.__HAMT.__copyChildren(oldPtr, newPtr, numChildren, updateIdx, newChild, i + 1) + +// Copy internal node with a new child inserted at position +def Stdlib.__HAMT.__copyInternalWithInsert(oldPtr: RawPtr, oldBitmap: Int64, newBitmap: Int64, insertIdx: Int64, newChild: Dict) : Dict = + let oldNumChildren = Stdlib.Int64.popcount(oldBitmap) in + let newNumChildren = oldNumChildren + 1 in + let newNode = Stdlib.__HAMT.__allocInternal(newBitmap, newNumChildren) in + // Copy children, inserting new one at insertIdx + Stdlib.__HAMT.__copyChildrenWithInsert(oldPtr, newNode, oldNumChildren, insertIdx, newChild, 0, 0) + +// Copy children from old node to new node, inserting one +def Stdlib.__HAMT.__copyChildrenWithInsert(oldPtr: RawPtr, newPtr: RawPtr, oldNumChildren: Int64, insertIdx: Int64, newChild: Dict, oldI: Int64, newI: Int64) : Dict = + if newI == insertIdx then + // Insert the new child here + let offset = 8 + (newI * 8) in + let _ = __raw_set>(newPtr, offset, newChild) in + Stdlib.__HAMT.__copyChildrenWithInsert(oldPtr, newPtr, oldNumChildren, insertIdx, newChild, oldI, newI + 1) + else if oldI >= oldNumChildren then + Stdlib.__HAMT.__setTag(newPtr, 1) + else + // Copy from old node + let oldOffset = 8 + (oldI * 8) in + let newOffset = 8 + (newI * 8) in + let child = __raw_get>(oldPtr, oldOffset) in + let _ = __raw_set>(newPtr, newOffset, child) in + Stdlib.__HAMT.__copyChildrenWithInsert(oldPtr, newPtr, oldNumChildren, insertIdx, newChild, oldI + 1, newI + 1) + +def Stdlib.__HAMT.__copyChildrenExcluding(oldPtr: RawPtr, newPtr: RawPtr, oldNumChildren: Int64, excludeIdx: Int64, oldI: Int64, newI: Int64) : Dict = + if oldI >= oldNumChildren then + Stdlib.__HAMT.__setTag(newPtr, 1) + else if oldI == excludeIdx then + // Skip this child + Stdlib.__HAMT.__copyChildrenExcluding(oldPtr, newPtr, oldNumChildren, excludeIdx, oldI + 1, newI) + else + // Copy this child + let oldOffset = 8 + (oldI * 8) in + let newOffset = 8 + (newI * 8) in + let child = __raw_get>(oldPtr, oldOffset) in + let _ = __raw_set>(newPtr, newOffset, child) in + Stdlib.__HAMT.__copyChildrenExcluding(oldPtr, newPtr, oldNumChildren, excludeIdx, oldI + 1, newI + 1) + +// Copy internal node with one child removed +def Stdlib.__HAMT.__copyInternalWithRemove(oldPtr: RawPtr, oldBitmap: Int64, newBitmap: Int64, removeIdx: Int64) : Dict = + let oldNumChildren = Stdlib.Int64.popcount(oldBitmap) in + let newNumChildren = oldNumChildren - 1 in + if newNumChildren == 0 then + // No children left - return empty + __empty_dict() + else + let newNode = Stdlib.__HAMT.__allocInternal(newBitmap, newNumChildren) in + Stdlib.__HAMT.__copyChildrenExcluding(oldPtr, newNode, oldNumChildren, removeIdx, 0, 0) + +// Remove helper - recursive removal +def Stdlib.__HAMT.__removeHelper(node: Dict, key: k, keyHash: Int64, level: Int64) : Dict = + if __dict_is_null(node) then + // Empty - key not found, return empty + __empty_dict() + else + let tag = Stdlib.__HAMT.__getTag(node) in + let ptr = Stdlib.__HAMT.__clearTag(node) in + if tag == 2 then + // Leaf node + let storedKey = __raw_get(ptr, 0) in + if __key_eq(storedKey, key) then + // Found the key - return empty to remove it + __empty_dict() + else + // Different key - not found, return unchanged + node + else if tag == 1 then + // Internal node + let chunk = Stdlib.__HAMT.__hashChunk(keyHash, level) in + let bitmap = __raw_get(ptr, 0) in + if Stdlib.__HAMT.__hasBit(bitmap, chunk) then + let idx = Stdlib.__HAMT.__childIndex(bitmap, chunk) in + let oldChild = __raw_get>(ptr, 8 + (idx * 8)) in + let newChild = Stdlib.__HAMT.__removeHelper(oldChild, key, keyHash, level + 1) in + if __dict_is_null(newChild) then + // Child was removed - need to update this node + let numChildren = Stdlib.Int64.popcount(bitmap) in + if numChildren == 1 then + // This was the only child - return empty + __empty_dict() + else if numChildren == 2 then + // Two children, one being removed - check if we can collapse + // Get the other child index (0 if we're removing 1, 1 if removing 0) + let otherIdx = 1 - idx in + let otherChild = __raw_get>(ptr, 8 + (otherIdx * 8)) in + let otherTag = Stdlib.__HAMT.__getTag(otherChild) in + if otherTag == 2 then + // Other child is a leaf - collapse to it + otherChild + else + // Other child is internal - can't collapse, create new node + let newBitmap = Stdlib.__HAMT.__clearBit(bitmap, chunk) in + Stdlib.__HAMT.__copyInternalWithRemove(ptr, bitmap, newBitmap, idx) + else + // More than 2 children - create new node without removed child + let newBitmap = Stdlib.__HAMT.__clearBit(bitmap, chunk) in + Stdlib.__HAMT.__copyInternalWithRemove(ptr, bitmap, newBitmap, idx) + else + // Child was modified (but not removed) - update + Stdlib.__HAMT.__copyInternalWithUpdate(ptr, bitmap, idx, newChild) + else + // Bit not set - key not in this subtree + node + else if tag == 3 then + // Collision node - remove from collision + Stdlib.__HAMT.__removeFromCollision(ptr, key) + else + // Unknown tag - return unchanged + node + +def Stdlib.__HAMT.__containsHelper(node: Dict, key: k, keyHash: Int64, level: Int64) : Bool = + if __dict_is_null(node) then + false + else + let tag = Stdlib.__HAMT.__getTag(node) in + let ptr = Stdlib.__HAMT.__clearTag(node) in + if tag == 2 then + // Leaf node + let storedKey = __raw_get(ptr, 0) in + __key_eq(storedKey, key) + else if tag == 1 then + // Internal node + let chunk = Stdlib.__HAMT.__hashChunk(keyHash, level) in + let bitmap = __raw_get(ptr, 0) in + if Stdlib.__HAMT.__hasBit(bitmap, chunk) then + let idx = Stdlib.__HAMT.__childIndex(bitmap, chunk) in + let child = __raw_get>(ptr, 8 + (idx * 8)) in + Stdlib.__HAMT.__containsHelper(child, key, keyHash, level + 1) + else + false + else if tag == 3 then + // Collision node + Stdlib.__HAMT.__containsInCollision(ptr, key) + else + false + +// Count entries in dict +def Stdlib.__HAMT.__sizeHelper(node: Dict) : Int64 = + if __dict_is_null(node) then + 0 + else + let tag = Stdlib.__HAMT.__getTag(node) in + let ptr = Stdlib.__HAMT.__clearTag(node) in + if tag == 2 then + 1 + else if tag == 1 then + let bitmap = __raw_get(ptr, 0) in + Stdlib.__HAMT.__countChildren(ptr, bitmap, 0) + else if tag == 3 then + // Collision node - return count of entries + Stdlib.__HAMT.__collisionCount(ptr) + else + 0 + +def Stdlib.__HAMT.__countChildren(ptr: RawPtr, bitmap: Int64, idx: Int64) : Int64 = + if bitmap == 0 then + 0 + else + let child = __raw_get>(ptr, 8 + (idx * 8)) in + Stdlib.__HAMT.__sizeHelper(child) + Stdlib.__HAMT.__countChildren(ptr, bitmap & (bitmap - 1), idx + 1) + +// ============================================================================= +// Dict Enumeration (Generic) +// ============================================================================= + +// Get all keys from dict +def Stdlib.__HAMT.__keysHelper(node: Dict, acc: List) : List = + if __dict_is_null(node) then + acc + else + let tag = Stdlib.__HAMT.__getTag(node) in + let ptr = Stdlib.__HAMT.__clearTag(node) in + if tag == 2 then + let key = __raw_get(ptr, 0) in + [key, ...acc] + else if tag == 1 then + let bitmap = __raw_get(ptr, 0) in + Stdlib.__HAMT.__collectKeysFromChildren(ptr, bitmap, 0, acc) + else if tag == 3 then + let count = Stdlib.__HAMT.__collisionCount(ptr) in + Stdlib.__HAMT.__collectCollisionKeys(ptr, count, 0, acc) + else + acc + +def Stdlib.__HAMT.__collectKeysFromChildren(ptr: RawPtr, bitmap: Int64, idx: Int64, acc: List) : List = + if bitmap == 0 then + acc + else + let child = __raw_get>(ptr, 8 + (idx * 8)) in + let newAcc = Stdlib.__HAMT.__keysHelper(child, acc) in + Stdlib.__HAMT.__collectKeysFromChildren(ptr, bitmap & (bitmap - 1), idx + 1, newAcc) + +// Get all values from dict +def Stdlib.__HAMT.__valuesHelper(node: Dict, acc: List) : List = + if __dict_is_null(node) then + acc + else + let tag = Stdlib.__HAMT.__getTag(node) in + let ptr = Stdlib.__HAMT.__clearTag(node) in + if tag == 2 then + let value = __raw_get(ptr, 8) in + [value, ...acc] + else if tag == 1 then + let bitmap = __raw_get(ptr, 0) in + Stdlib.__HAMT.__collectValuesFromChildren(ptr, bitmap, 0, acc) + else if tag == 3 then + let count = Stdlib.__HAMT.__collisionCount(ptr) in + Stdlib.__HAMT.__collectCollisionValues(ptr, count, 0, acc) + else + acc + +def Stdlib.__HAMT.__collectValuesFromChildren(ptr: RawPtr, bitmap: Int64, idx: Int64, acc: List) : List = + if bitmap == 0 then + acc + else + let child = __raw_get>(ptr, 8 + (idx * 8)) in + let newAcc = Stdlib.__HAMT.__valuesHelper(child, acc) in + Stdlib.__HAMT.__collectValuesFromChildren(ptr, bitmap & (bitmap - 1), idx + 1, newAcc) + +// Get all entries from dict as key-value tuples +def Stdlib.__HAMT.__entriesHelper(node: Dict, acc: List<(k, v)>) : List<(k, v)> = + if __dict_is_null(node) then + acc + else + let tag = Stdlib.__HAMT.__getTag(node) in + let ptr = Stdlib.__HAMT.__clearTag(node) in + if tag == 2 then + let key = __raw_get(ptr, 0) in + let value = __raw_get(ptr, 8) in + [(key, value), ...acc] + else if tag == 1 then + let bitmap = __raw_get(ptr, 0) in + Stdlib.__HAMT.__collectEntriesFromChildren(ptr, bitmap, 0, acc) + else if tag == 3 then + let count = Stdlib.__HAMT.__collisionCount(ptr) in + Stdlib.__HAMT.__collectCollisionEntries(ptr, count, 0, acc) + else + acc + +def Stdlib.__HAMT.__collectEntriesFromChildren(ptr: RawPtr, bitmap: Int64, idx: Int64, acc: List<(k, v)>) : List<(k, v)> = + if bitmap == 0 then + acc + else + let child = __raw_get>(ptr, 8 + (idx * 8)) in + let newAcc = Stdlib.__HAMT.__entriesHelper(child, acc) in + Stdlib.__HAMT.__collectEntriesFromChildren(ptr, bitmap & (bitmap - 1), idx + 1, newAcc) + +// Fold over all entries in the dictionary +def Stdlib.__HAMT.__foldHelper(node: Dict, acc: a, f: (a, k, v) -> a) : a = + if __dict_is_null(node) then + acc + else + let tag = Stdlib.__HAMT.__getTag(node) in + let ptr = Stdlib.__HAMT.__clearTag(node) in + if tag == 2 then + let key = __raw_get(ptr, 0) in + let value = __raw_get(ptr, 8) in + f(acc, key, value) + else if tag == 1 then + let bitmap = __raw_get(ptr, 0) in + Stdlib.__HAMT.__foldChildren(ptr, bitmap, 0, acc, f) + else if tag == 3 then + let count = Stdlib.__HAMT.__collisionCount(ptr) in + Stdlib.__HAMT.__foldCollision(ptr, count, 0, acc, f) + else + acc + +def Stdlib.__HAMT.__foldChildren(ptr: RawPtr, bitmap: Int64, idx: Int64, acc: a, f: (a, k, v) -> a) : a = + if bitmap == 0 then + acc + else + let child = __raw_get>(ptr, 8 + (idx * 8)) in + let newAcc = Stdlib.__HAMT.__foldHelper(child, acc, f) in + Stdlib.__HAMT.__foldChildren(ptr, bitmap & (bitmap - 1), idx + 1, newAcc, f) + +// Map over all values in the dictionary +def Stdlib.__HAMT.__mapHelper(node: Dict, f: (k, v) -> w) : Dict = + if __dict_is_null(node) then + __empty_dict() + else + let tag = Stdlib.__HAMT.__getTag(node) in + let ptr = Stdlib.__HAMT.__clearTag(node) in + if tag == 2 then + let key = __raw_get(ptr, 0) in + let value = __raw_get(ptr, 8) in + let newValue = f(key, value) in + Stdlib.__HAMT.__allocLeaf(key, newValue) + else if tag == 1 then + let bitmap = __raw_get(ptr, 0) in + let numChildren = Stdlib.Int64.popcount(bitmap) in + let newPtr = Stdlib.__HAMT.__allocInternal(bitmap, numChildren) in + Stdlib.__HAMT.__mapChildren(ptr, newPtr, bitmap, 0, numChildren, f) + else if tag == 3 then + let count = Stdlib.__HAMT.__collisionCount(ptr) in + Stdlib.__HAMT.__mapCollision(ptr, count, f) + else + __empty_dict() + +def Stdlib.__HAMT.__mapChildren(oldPtr: RawPtr, newPtr: RawPtr, bitmap: Int64, idx: Int64, numChildren: Int64, f: (k, v) -> w) : Dict = + if idx >= numChildren then + Stdlib.__HAMT.__setTag(newPtr, 1) + else + let child = __raw_get>(oldPtr, 8 + (idx * 8)) in + let mappedChild = Stdlib.__HAMT.__mapHelper(child, f) in + let _ = __raw_set>(newPtr, 8 + (idx * 8), mappedChild) in + Stdlib.__HAMT.__mapChildren(oldPtr, newPtr, bitmap, idx + 1, numChildren, f) + +// Filter entries in the dictionary +def Stdlib.__HAMT.__filterHelper(node: Dict, acc: Dict, f: (k, v) -> Bool) : Dict = + if __dict_is_null(node) then + acc + else + let tag = Stdlib.__HAMT.__getTag(node) in + let ptr = Stdlib.__HAMT.__clearTag(node) in + if tag == 2 then + let key = __raw_get(ptr, 0) in + let value = __raw_get(ptr, 8) in + if f(key, value) then Stdlib.Dict.set(acc, key, value) else acc + else if tag == 1 then + let bitmap = __raw_get(ptr, 0) in + Stdlib.__HAMT.__filterChildren(ptr, bitmap, 0, acc, f) + else + acc + +def Stdlib.__HAMT.__filterChildren(ptr: RawPtr, bitmap: Int64, idx: Int64, acc: Dict, f: (k, v) -> Bool) : Dict = + if bitmap == 0 then + acc + else + let child = __raw_get>(ptr, 8 + (idx * 8)) in + let newAcc = Stdlib.__HAMT.__filterHelper(child, acc, f) in + Stdlib.__HAMT.__filterChildren(ptr, bitmap & (bitmap - 1), idx + 1, newAcc, f) + +// ============================================================================= +// Dict.merge - Combine two dictionaries +// ============================================================================= +// Second dictionary's values win on key conflicts + +def Stdlib.__HAMT.__mergeHelper(source: Dict, target: Dict) : Dict = + if __dict_is_null(source) then + target + else + let tag = Stdlib.__HAMT.__getTag(source) in + let ptr = Stdlib.__HAMT.__clearTag(source) in + if tag == 2 then + let key = __raw_get(ptr, 0) in + let value = __raw_get(ptr, 8) in + Stdlib.Dict.set(target, key, value) + else if tag == 1 then + let bitmap = __raw_get(ptr, 0) in + Stdlib.__HAMT.__mergeChildren(ptr, bitmap, 0, target) + else + target + +def Stdlib.__HAMT.__mergeChildren(ptr: RawPtr, bitmap: Int64, idx: Int64, target: Dict) : Dict = + if bitmap == 0 then + target + else + let child = __raw_get>(ptr, 8 + (idx * 8)) in + let newTarget = Stdlib.__HAMT.__mergeHelper(child, target) in + Stdlib.__HAMT.__mergeChildren(ptr, bitmap & (bitmap - 1), idx + 1, newTarget) + +// ============================================================================= +// Dict.fromList - Construct dictionary from list of pairs +// ============================================================================= + +def Stdlib.__HAMT.__fromListHelper(pairs: List<(k, v)>, acc: Dict) : Dict = + match pairs with + | [] -> acc + | [pair, ...rest] -> + let key = Stdlib.Tuple2.first(pair) in + let value = Stdlib.Tuple2.second(pair) in + Stdlib.__HAMT.__fromListHelper(rest, Stdlib.Dict.set(acc, key, value)) + +// ============================================================================= +// Dict.getOrDefault - Get value with fallback +// ============================================================================= + diff --git a/backend/src/LibCompiler/stdlib/__Hash.dark b/backend/src/LibCompiler/stdlib/__Hash.dark new file mode 100644 index 0000000000..9c14c7b964 --- /dev/null +++ b/backend/src/LibCompiler/stdlib/__Hash.dark @@ -0,0 +1,37 @@ +// __Hash.dark - Internal hash and key equality helpers +// +// Pure Dark implementations used by Dict/HAMT and internal tests. + +// FNV-1a 64-bit constants +def __hash_offset() : Int64 = -3750763034362895579 +def __hash_prime() : Int64 = 1099511628211 + +// FNV-1a hash over UTF-8 bytes +def __string_hash(s: String) : Int64 = + let len = Stdlib.String.length(s) in + __string_hash_loop(s, 0, len, __hash_offset()) + +def __string_hash_loop(s: String, idx: Int64, len: Int64, acc: Int64) : Int64 = + if idx >= len then + acc + else + let byte = Stdlib.String.getByteAt(s, idx) in + let next = (acc ^ byte) * __hash_prime() in + __string_hash_loop(s, idx + 1, len, next) + +// Byte-wise string equality +def __string_eq(s1: String, s2: String) : Bool = + Stdlib.String.equals(s1, s2) + +// Hash specializations (monomorphized by compiler) +def __hash_i64(value: Int64) : Int64 = value +def __hash_bool(value: Bool) : Int64 = if value then 1 else 0 +def __hash_str(value: String) : Int64 = __string_hash(value) + +// Key equality specializations (monomorphized by compiler) +def __key_eq_i64(left: Int64, right: Int64) : Bool = left == right +def __key_eq_bool(left: Bool, right: Bool) : Bool = left == right +def __key_eq_str(left: String, right: String) : Bool = __string_eq(left, right) + +// Unresolved generic __hash/__key_eq calls are handled in compiler lowering by +// emitting explicit runtime errors before codegen; no unknown fallback stubs live here. diff --git a/backend/src/LibCompiler/unicode_data.dark b/backend/src/LibCompiler/unicode_data.dark new file mode 100644 index 0000000000..a977c59f2d --- /dev/null +++ b/backend/src/LibCompiler/unicode_data.dark @@ -0,0 +1,20 @@ +// Unicode data tables (minimal test version) + +// Uppercase mapping: codepoint -> list of codepoints +def Unicode.Data.__upperCase() : Dict> = + Stdlib.Dict.fromList>([ + (97, [65]), (98, [66]), (99, [67]), (100, [68]), (101, [69]), + (223, [83, 83]) + ]) + +// Lowercase mapping: codepoint -> list of codepoints +def Unicode.Data.__lowerCase() : Dict> = + Stdlib.Dict.fromList>([ + (65, [97]), (66, [98]), (67, [99]), (68, [100]), (69, [101]) + ]) + +// Grapheme break property (minimal) +def Unicode.Data.__graphemeBreak() : Dict = + Stdlib.Dict.fromList([ + (10, 2), (13, 1), (8205, 5) + ]) From 5e9534c62d2609e20350fe48413a2095b94a2a0f Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 16:14:27 -0400 Subject: [PATCH 075/172] compiler: add guarded Builtins.Compiler as the 10th combine entry (build-gated) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The compiler extension's builtin assembly — sibling to the other nine, hosting the small `compile` surface and (next) the ProgramTypes->AST bridge. For now one placeholder builtin, `compilerInfo`, which reads CompilerLibrary.defaultOptions so LibCompiler genuinely links in-process, not merely resolves. Build-gating (plan §3.5), the hard requirement — the ~51K LOC must not touch the default build: - LibCompiler + Builtins.Compiler are absent from fsdark.sln. - LocalExec pulls them in only under -p:DarkWithCompiler=true, which also defines DARK_WITH_COMPILER; the 10th combine entry in LocalExec/Builtins.fs sits behind #if DARK_WITH_COMPILER. Proven both ways via LocalExec.deps.json: default build excludes the compiler (core fast/unchanged); -p:DarkWithCompiler=true links LibCompiler.dll + Builtins.Compiler.dll. Full default fsdark.sln stays green. Cli.fs wiring deferred to the bridge step — Cli.fsproj is trim/AOT and linking 51K LOC there needs a deliberate trim posture, handled with the real builtin. --- .../src/Builtins/Builtins.Compiler/Builtin.fs | 8 +++++ .../Builtins.Compiler.fsproj | 29 +++++++++++++++ .../Builtins.Compiler/Libs/Compiler.fs | 36 +++++++++++++++++++ .../Builtins.Compiler/paket.references | 2 ++ backend/src/LocalExec/Builtins.fs | 8 ++++- backend/src/LocalExec/LocalExec.fsproj | 14 ++++++++ 6 files changed, 96 insertions(+), 1 deletion(-) create mode 100644 backend/src/Builtins/Builtins.Compiler/Builtin.fs create mode 100644 backend/src/Builtins/Builtins.Compiler/Builtins.Compiler.fsproj create mode 100644 backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs create mode 100644 backend/src/Builtins/Builtins.Compiler/paket.references diff --git a/backend/src/Builtins/Builtins.Compiler/Builtin.fs b/backend/src/Builtins/Builtins.Compiler/Builtin.fs new file mode 100644 index 0000000000..c2eebc587f --- /dev/null +++ b/backend/src/Builtins/Builtins.Compiler/Builtin.fs @@ -0,0 +1,8 @@ +module Builtins.Compiler.Builtin + +module Builtin = LibExecution.Builtin + +let fnRenames : Builtin.FnRenames = [] + +let builtins () = + Builtin.combine [ Libs.Compiler.builtins () ] fnRenames diff --git a/backend/src/Builtins/Builtins.Compiler/Builtins.Compiler.fsproj b/backend/src/Builtins/Builtins.Compiler/Builtins.Compiler.fsproj new file mode 100644 index 0000000000..582bb11ece --- /dev/null +++ b/backend/src/Builtins/Builtins.Compiler/Builtins.Compiler.fsproj @@ -0,0 +1,29 @@ + + + + + Library + false + false + + + + + + + + + + + + + diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs new file mode 100644 index 0000000000..14d8f07bf6 --- /dev/null +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -0,0 +1,36 @@ +module Builtins.Compiler.Libs.Compiler + +// The compiler extension's builtin surface. For now this is a single +// linkage-proving placeholder; the real `compile` builtins and the +// ProgramTypes -> compiler-AST bridge (plan §5/§6) land here next. + +open Prelude +open LibExecution.RuntimeTypes +open LibExecution.Builtin.Shortcuts + +/// `Builtin.compilerInfo ()` — reports that the native compiler extension is +/// linked and reachable. It deliberately reads a value out of the airlifted +/// `CompilerLibrary` so the linker genuinely pulls in LibCompiler (proving the +/// airlift links in-process, not merely that the project reference resolves). +let fns () : List = + [ { name = fn "compilerInfo" 0 + typeParams = [] + parameters = [ Param.make "unit" TUnit "" ] + returnType = TString + description = + "Reports that the native compiler extension is linked and available. Placeholder for the airlift spike; superseded by the real `compile` surface." + fn = + (function + | _, _, _, [ DUnit ] -> + // Touch CompilerLibrary so LibCompiler is actually linked. + let opts = CompilerLibrary.defaultOptions + let msg = + $"native compiler linked (DisableFreeList={opts.DisableFreeList}, DisableTCO={opts.DisableTCO})" + DString msg |> Ply + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Pure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } ] + +let builtins () = LibExecution.Builtin.make [] (fns ()) diff --git a/backend/src/Builtins/Builtins.Compiler/paket.references b/backend/src/Builtins/Builtins.Compiler/paket.references new file mode 100644 index 0000000000..668f52d153 --- /dev/null +++ b/backend/src/Builtins/Builtins.Compiler/paket.references @@ -0,0 +1,2 @@ +Ply +FSharp.Core diff --git a/backend/src/LocalExec/Builtins.fs b/backend/src/LocalExec/Builtins.fs index ce24975420..24f91940c8 100644 --- a/backend/src/LocalExec/Builtins.fs +++ b/backend/src/LocalExec/Builtins.fs @@ -22,5 +22,11 @@ let all () : RT.Builtins = Builtins.Matter.Builtin.builtins ptPM Builtins.CliHost.Builtin.builtins () Builtins.Http.Server.Builtin.builtins () - TestUtils.LibTest.builtins () ] + TestUtils.LibTest.builtins () +#if DARK_WITH_COMPILER + // 10th entry: the airlifted compiler extension. Present only in + // -p:DarkWithCompiler=true builds; the core links without it. + Builtins.Compiler.Builtin.builtins () +#endif + ] [] diff --git a/backend/src/LocalExec/LocalExec.fsproj b/backend/src/LocalExec/LocalExec.fsproj index adfb534cea..dfdaa3e77c 100644 --- a/backend/src/LocalExec/LocalExec.fsproj +++ b/backend/src/LocalExec/LocalExec.fsproj @@ -3,6 +3,20 @@ Exe + + + $(DefineConstants);DARK_WITH_COMPILER + + + + From 2afd01bb5b863164334b2ad7361c528ec19deeed Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 16:28:31 -0400 Subject: [PATCH 076/172] =?UTF-8?q?compiler:=20first=20light=20=E2=80=94?= =?UTF-8?q?=20compile+run=20pure-core=20from=20Dark,=20matching=20the=20in?= =?UTF-8?q?terpreter?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The airlifted compiler now runs in-process and is reachable from Dark. Proven on this x86-64 box: 2+3, let-bindings, precedence, if-exprs all compile to native ELF, execute, and differentially MATCH the interpreter. - LibCompiler.fsproj ships its bundled .dark stdlib next to the dll (CopyToOutputDirectory) so CompilerLibrary.buildStdlib resolves at runtime wherever the assembly lands. - Builtins.Compiler/Libs/Compiler.fs: `Builtin.compilerCompile` and `Builtin.compilerCompileAndRun` (source String -> (Bool ok, String out)), with a cached StdlibResult (buildStdlib is heavy). Text-fed interim (plan §5): callers pass interpreter-dialect source; the real PT->AST bridge (§6) replaces this hop next. - Guarded 10th combine entry now also wired into Cli.fs (+ Cli.fsproj conditional reference). Debug CLI with -p:DarkWithCompiler=true is green and dogfooded via `dark eval "Builtin.compilerCompileAndRun \"2 + 3\""` -> (true, "5"). Trimming bites only the published/AOT build, not this dev path. Gating intact: default fsdark.sln and default Cli both green with the compiler ABSENT from their deps.json. x86-64 refcounting is disabled upstream, but a pure-Int leaf allocates no heap, so native execution is correct here (it would only leak, harmlessly, for a short compile+run). --- .../Builtins.Compiler/Libs/Compiler.fs | 87 ++++++++++++++++--- backend/src/Cli/Cli.fs | 7 +- backend/src/Cli/Cli.fsproj | 14 +++ backend/src/LibCompiler/LibCompiler.fsproj | 17 ++++ 4 files changed, 113 insertions(+), 12 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 14d8f07bf6..31530f9f74 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -1,36 +1,101 @@ module Builtins.Compiler.Libs.Compiler -// The compiler extension's builtin surface. For now this is a single -// linkage-proving placeholder; the real `compile` builtins and the -// ProgramTypes -> compiler-AST bridge (plan §5/§6) land here next. +// The compiler extension's builtin surface. These call the airlifted +// CompilerLibrary in-process (no shelling out to a `dark` binary). This is the +// interim, text-fed path (plan §5): callers hand over compiler-syntax source; +// the real PT->compiler-AST bridge (plan §6) lands next and replaces the text +// hop for entities pulled from the package tree. open Prelude open LibExecution.RuntimeTypes open LibExecution.Builtin.Shortcuts -/// `Builtin.compilerInfo ()` — reports that the native compiler extension is -/// linked and reachable. It deliberately reads a value out of the airlifted -/// `CompilerLibrary` so the linker genuinely pulls in LibCompiler (proving the -/// airlift links in-process, not merely that the project reference resolves). +module VT = LibExecution.ValueType + +/// buildStdlib parses + compiles the ~30 bundled .dark stdlib files; it's heavy, +/// so build it once and reuse. (Retires with the bundled stdlib once the bridge +/// consumes the main-repo tree.) +let private stdlibResult : Lazy> = + lazy (CompilerLibrary.buildStdlib ()) + +/// Compile compiler-syntax source to a native binary, in-process. +let private compileSource (source : string) : Result = + match stdlibResult.Value with + | Error e -> Error $"buildStdlib: {e}" + | Ok stdlib -> + let request : CompilerLibrary.CompileRequest = + { Context = CompilerLibrary.StdlibOnly stdlib + Mode = CompilerLibrary.CompileMode.FullProgram + SourceSyntax = CompilerLibrary.InterpreterSyntax + Source = source + SourceFile = "" + AllowInternal = false + Verbosity = 0 + Options = CompilerLibrary.defaultOptions + PassTimingRecorder = None } + (CompilerLibrary.compile request).Result + +/// Return a (Bool ok, String detail) tuple as a Dark value. +let private outcome (ok : bool) (detail : string) : Dval = + DTuple(DBool ok, DString detail, []) + let fns () : List = [ { name = fn "compilerInfo" 0 typeParams = [] parameters = [ Param.make "unit" TUnit "" ] returnType = TString description = - "Reports that the native compiler extension is linked and available. Placeholder for the airlift spike; superseded by the real `compile` surface." + "Reports that the native compiler extension is linked and available." fn = (function | _, _, _, [ DUnit ] -> - // Touch CompilerLibrary so LibCompiler is actually linked. let opts = CompilerLibrary.defaultOptions - let msg = + DString $"native compiler linked (DisableFreeList={opts.DisableFreeList}, DisableTCO={opts.DisableTCO})" - DString msg |> Ply + |> Ply | _ -> incorrectArgs ()) sqlSpec = NotQueryable previewable = Pure capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + { name = fn "compilerCompile" 0 + typeParams = [] + parameters = [ Param.make "source" TString "compiler-syntax (interpreter-dialect) Dark source" ] + returnType = TTuple(TBool, TString, []) + description = + "Compiles to a native binary in-process via the airlifted compiler. Returns (true, \" bytes\") on success or (false, ) on failure. Does not execute the binary." + fn = + (function + | _, _, _, [ DString source ] -> + match compileSource source with + | Ok binary -> outcome true $"{binary.Length} bytes" |> Ply + | Error e -> outcome false e |> Ply + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + { name = fn "compilerCompileAndRun" 0 + typeParams = [] + parameters = [ Param.make "source" TString "compiler-syntax (interpreter-dialect) Dark source" ] + returnType = TTuple(TBool, TString, []) + description = + "Compiles to a native binary and executes it in-process. Returns (true, ) on success or (false, ) on failure. NOTE: runs native code; x86-64 refcounting is disabled, so long/allocation-heavy programs may leak (fine for short pure-core leaves)." + fn = + (function + | _, _, _, [ DString source ] -> + match compileSource source with + | Error e -> outcome false $"compile: {e}" |> Ply + | Ok binary -> + let out = CompilerLibrary.execute 0 binary + if out.ExitCode = 0 then outcome true out.Stdout |> Ply + else outcome false $"exit {out.ExitCode}: {out.Stderr}" |> Ply + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps deprecated = NotDeprecated } ] let builtins () = LibExecution.Builtin.make [] (fns ()) diff --git a/backend/src/Cli/Cli.fs b/backend/src/Cli/Cli.fs index f453166e5e..7afe0b67f7 100644 --- a/backend/src/Cli/Cli.fs +++ b/backend/src/Cli/Cli.fs @@ -66,7 +66,12 @@ let builtins : RT.Builtins = LibExecution.Builtin.combine [ Builtins.CliHost.Libs.Cli.builtinsToUse () Builtins.CliHost.Builtin.builtins () - BuiltinCli.builtins () ] + BuiltinCli.builtins () +#if DARK_WITH_COMPILER + // 10th entry: the airlifted compiler extension (build-gated). + Builtins.Compiler.Builtin.builtins () +#endif + ] [] diff --git a/backend/src/Cli/Cli.fsproj b/backend/src/Cli/Cli.fsproj index c5365b4354..57a3196592 100644 --- a/backend/src/Cli/Cli.fsproj +++ b/backend/src/Cli/Cli.fsproj @@ -142,6 +142,20 @@ + + + $(DefineConstants);DARK_WITH_COMPILER + + + + diff --git a/backend/src/LibCompiler/LibCompiler.fsproj b/backend/src/LibCompiler/LibCompiler.fsproj index bf3d54fc4a..c530f82e5f 100644 --- a/backend/src/LibCompiler/LibCompiler.fsproj +++ b/backend/src/LibCompiler/LibCompiler.fsproj @@ -107,4 +107,21 @@ + + + + PreserveNewest + stdlib/%(RecursiveDir)%(Filename)%(Extension) + + + PreserveNewest + + + From 9d1bba7a17fefb6dae0a1119e17425f1bd04e38f Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 17:02:19 -0400 Subject: [PATCH 077/172] =?UTF-8?q?compiler:=20PT->AST=20bridge=20?= =?UTF-8?q?=E2=80=94=20lower=20a=20ProgramTypes=20fn=20tree=20to=20native,?= =?UTF-8?q?=20no=20text=20hop=20(=C2=A76)?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The durable §6 path, proven end to end and reachable from Dark: `Builtin.compilerBridgeSelfTest ()` -> (true, "42"). It builds a ProgramTypes function `(a: Int64) (b: Int64): Int64 = a + b` in F#, lowers it via Bridge to compiler AST, synthesizes bridgedFn(20, 22), compiles that AST DIRECTLY, runs the native binary, and gets 42 — never touching the compiler's (diverged) text parser. - LibCompiler/CompilerLibrary.fs: new `compileAstProgram` entry + a `PrebuiltAst` field on the plan. When set, the pipeline skips parseProgram and type-checks the injected AST. (Verified a hand-built AST for 2+3 compiles+runs.) - Builtins.Compiler/Bridge.fs: the translator. TOTAL and hard-failing — every supported node lowers; everything else returns "unsupported-: " (a ranked blocker record, never a guess). Scope today = the pure-core leaf subset: Int/Bool literals, all int-width types, EInfix (arith/compare/concat/ bool), EIf, ELet(var), EVariable, EArg (positional params). Generics, EApply, EMatch, EList, tuples, pipes deliberately hard-fail. - Builtins.Compiler exposes `compilerBridgeSelfTest` alongside the text builtins. Gating unchanged: all of this is behind -p:DarkWithCompiler=true. Next: fetch a REAL package fn's ProgramTypes from the store (DB-backed PT PackageManager, branch-aware) and bridge it, so `dark compile` works on live entities — then diff-match vs the interpreter and start ranking the hard-fails by unlock count. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 158 ++++++++++++++++++ .../Builtins.Compiler.fsproj | 1 + .../Builtins.Compiler/Libs/Compiler.fs | 67 ++++++++ backend/src/LibCompiler/CompilerLibrary.fs | 19 ++- 4 files changed, 243 insertions(+), 2 deletions(-) create mode 100644 backend/src/Builtins/Builtins.Compiler/Bridge.fs diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs new file mode 100644 index 0000000000..f96e768a99 --- /dev/null +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -0,0 +1,158 @@ +module Builtins.Compiler.Bridge + +// The ProgramTypes -> compiler-AST bridge (plan §6), the durable path that +// avoids re-parsing text. It is a TOTAL function: every construct it +// understands it lowers; everything else returns a structured, categorized +// hard-fail (never a guess, never a silent drop). Each `Error` string is a +// blocker record: "unsupported-: " — greppable and rank-able. +// +// Scope today: the pure-core leaf subset (Int/Bool arithmetic, let, if, vars, +// params). Expands reactively, driven by which hard-fails block the most +// entities — not speculatively. + +open Prelude + +module PT = LibExecution.ProgramTypes + +// AST here is the airlifted compiler's AST (top-level module in LibCompiler). + +let private err (category : string) (detail : string) : Result<'a, string> = + Error $"unsupported-{category}: {detail}" + +/// Collect a list of Results, short-circuiting on the first Error. +let private allOk (results : List>) : Result, string> = + (Ok [], results) + ||> List.fold (fun acc r -> + match acc, r with + | Error e, _ -> Error e + | Ok _, Error e -> Error e + | Ok xs, Ok x -> Ok(xs @ [ x ])) + +// --------------------------------------------------------------------------- +// Types +// --------------------------------------------------------------------------- + +let rec bridgeType (t : PT.TypeReference) : Result = + match t with + | PT.TInt64 -> Ok AST.TInt64 + | PT.TInt8 -> Ok AST.TInt8 + | PT.TInt16 -> Ok AST.TInt16 + | PT.TInt32 -> Ok AST.TInt32 + | PT.TInt128 -> Ok AST.TInt128 + | PT.TUInt8 -> Ok AST.TUInt8 + | PT.TUInt16 -> Ok AST.TUInt16 + | PT.TUInt32 -> Ok AST.TUInt32 + | PT.TUInt64 -> Ok AST.TUInt64 + | PT.TUInt128 -> Ok AST.TUInt128 + // Dark's default Int is arbitrary-precision; the compiler has no bigint, so + // we lower it to Int64. Sound for values in range (which a pure-core leaf's + // literals/params are); wrapping semantics would differ at the Int64 edges. + | PT.TInt -> Ok AST.TInt64 + | PT.TBool -> Ok AST.TBool + | PT.TString -> Ok AST.TString + | PT.TFloat -> Ok AST.TFloat64 + | PT.TChar -> Ok AST.TChar + | PT.TUnit -> Ok AST.TUnit + | other -> err "type" (string other) + +// --------------------------------------------------------------------------- +// Infix operators +// --------------------------------------------------------------------------- + +let private bridgeInfix (op : PT.Infix) : Result = + match op with + | PT.InfixFnCall PT.ArithmeticPlus -> Ok AST.Add + | PT.InfixFnCall PT.ArithmeticMinus -> Ok AST.Sub + | PT.InfixFnCall PT.ArithmeticMultiply -> Ok AST.Mul + | PT.InfixFnCall PT.ArithmeticDivide -> Ok AST.Div + | PT.InfixFnCall PT.ArithmeticModulo -> Ok AST.Mod + | PT.InfixFnCall PT.ComparisonGreaterThan -> Ok AST.Gt + | PT.InfixFnCall PT.ComparisonGreaterThanOrEqual -> Ok AST.Gte + | PT.InfixFnCall PT.ComparisonLessThan -> Ok AST.Lt + | PT.InfixFnCall PT.ComparisonLessThanOrEqual -> Ok AST.Lte + | PT.InfixFnCall PT.ComparisonEquals -> Ok AST.Eq + | PT.InfixFnCall PT.ComparisonNotEquals -> Ok AST.Neq + | PT.InfixFnCall PT.StringConcat -> Ok AST.StringConcat + | PT.InfixFnCall PT.ArithmeticPower -> err "infix" "power (no compiler BinOp)" + | PT.BinOp PT.BinOpAnd -> Ok AST.And + | PT.BinOp PT.BinOpOr -> Ok AST.Or + +// --------------------------------------------------------------------------- +// Expressions +// +// `paramNames.[i]` gives the compiler-side name for the i-th parameter; Dark +// bodies reference params positionally via EArg(id, index). +// --------------------------------------------------------------------------- + +let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result = + let recurse = bridgeExpr paramNames + match e with + | PT.EInt64(_, n) -> Ok(AST.Int64Literal n) + | PT.EInt(_, big) -> + if big >= bigint System.Int64.MinValue && big <= bigint System.Int64.MaxValue then + Ok(AST.Int64Literal(int64 big)) + else + err "literal" "Int outside Int64 range" + | PT.EBool(_, b) -> Ok(AST.BoolLiteral b) + | PT.EUnit _ -> Ok AST.UnitLiteral + | PT.EString(_, [ PT.StringText s ]) -> Ok(AST.StringLiteral s) + | PT.EString(_, _) -> err "expr" "EString with interpolation/multi-segment" + | PT.EChar(_, c) -> Ok(AST.CharLiteral c) + | PT.EVariable(_, name) -> Ok(AST.Var name) + | PT.EArg(_, i) -> + if i >= 0 && i < paramNames.Length then Ok(AST.Var paramNames[i]) + else err "arg" $"EArg index {i} out of range" + | PT.EInfix(_, op, l, r) -> + bridgeInfix op + |> Result.bind (fun o -> + recurse l + |> Result.bind (fun bl -> recurse r |> Result.map (fun br -> AST.BinOp(o, bl, br)))) + | PT.EIf(_, cond, thenE, Some elseE) -> + recurse cond + |> Result.bind (fun c -> + recurse thenE + |> Result.bind (fun t -> recurse elseE |> Result.map (fun el -> AST.If(c, t, el)))) + | PT.EIf(_, _, _, None) -> err "if" "if without else" + | PT.ELet(_, PT.LPVariable(_, name), value, body) -> + recurse value + |> Result.bind (fun v -> recurse body |> Result.map (fun b -> AST.Let(name, v, b))) + | PT.ELet(_, _, _, _) -> err "let" "non-variable let pattern" + // Deliberately unsupported for the leaf subset (each is a ranked blocker): + | PT.EApply(_, _, _, _) -> err "expr" "EApply (cross-fn call)" + | PT.EMatch(_, _, _) -> err "expr" "EMatch" + | PT.EList(_, _) -> err "expr" "EList" + | PT.ETuple(_, _, _, _) -> err "expr" "ETuple" + | PT.EPipe(_, _, _) -> err "expr" "EPipe" + | _ -> err "expr" (e.GetType().Name) + +// --------------------------------------------------------------------------- +// Functions +// --------------------------------------------------------------------------- + +/// Lower a package function to a compiler FunctionDef under the given +/// compiler-side name. Params keep their Dark names (positional EArg refs and +/// any by-name refs both resolve). Generics are not yet supported. +let bridgeFn + (compiledName : string) + (fn : PT.PackageFn.PackageFn) + : Result = + if not (List.isEmpty fn.typeParams) then + err "generics" $"function has type params: {fn.typeParams}" + else + let paramList = NEList.toList fn.parameters + let paramNames = paramList |> List.map (fun p -> p.name) |> Array.ofList + let bridgedParams = + paramList + |> List.map (fun p -> bridgeType p.typ |> Result.map (fun t -> (p.name, t))) + |> allOk + bridgedParams + |> Result.bind (fun ps -> + bridgeType fn.returnType + |> Result.bind (fun retType -> + bridgeExpr paramNames fn.body + |> Result.map (fun body -> + ({ Name = compiledName + TypeParams = [] + Params = AST.NonEmptyList.fromList ps + ReturnType = retType + Body = body } : AST.FunctionDef)))) diff --git a/backend/src/Builtins/Builtins.Compiler/Builtins.Compiler.fsproj b/backend/src/Builtins/Builtins.Compiler/Builtins.Compiler.fsproj index 582bb11ece..6f257ca5c2 100644 --- a/backend/src/Builtins/Builtins.Compiler/Builtins.Compiler.fsproj +++ b/backend/src/Builtins/Builtins.Compiler/Builtins.Compiler.fsproj @@ -22,6 +22,7 @@ + diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 31530f9f74..4fc2c60853 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -11,6 +11,8 @@ open LibExecution.RuntimeTypes open LibExecution.Builtin.Shortcuts module VT = LibExecution.ValueType +module PT = LibExecution.ProgramTypes +module Bridge = Builtins.Compiler.Bridge /// buildStdlib parses + compiles the ~30 bundled .dark stdlib files; it's heavy, /// so build it once and reuse. (Retires with the bundled stdlib once the bridge @@ -35,6 +37,24 @@ let private compileSource (source : string) : Result = PassTimingRecorder = None } (CompilerLibrary.compile request).Result +/// Compile a pre-built compiler AST program (the PT->AST bridge path, §6), +/// skipping the text parser entirely. +let private compileAst (program : AST.Program) : Result = + match stdlibResult.Value with + | Error e -> Error $"buildStdlib: {e}" + | Ok stdlib -> + let request : CompilerLibrary.CompileRequest = + { Context = CompilerLibrary.StdlibOnly stdlib + Mode = CompilerLibrary.CompileMode.FullProgram + SourceSyntax = CompilerLibrary.InterpreterSyntax + Source = "" + SourceFile = "" + AllowInternal = false + Verbosity = 0 + Options = CompilerLibrary.defaultOptions + PassTimingRecorder = None } + (CompilerLibrary.compileAstProgram request program).Result + /// Return a (Bool ok, String detail) tuple as a Dark value. let private outcome (ok : bool) (detail : string) : Dval = DTuple(DBool ok, DString detail, []) @@ -96,6 +116,53 @@ let fns () : List = sqlSpec = NotQueryable previewable = Impure capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + { name = fn "compilerBridgeSelfTest" 0 + typeParams = [] + parameters = [ Param.make "unit" TUnit "" ] + returnType = TTuple(TBool, TString, []) + description = + "Proves the ProgramTypes->compiler-AST bridge (§6) end to end: builds a PT function `(a,b) => a + b` in F#, lowers it via Bridge.bridgeFn to compiler AST, synthesizes `bridgedFn(20, 22)`, compiles that AST directly (no text/parser), runs it, and returns (true, \"42\") on success. This is the durable path the text builtins will be replaced by." + fn = + (function + | _, _, _, [ DUnit ] -> + // A pure-Int leaf, constructed as ProgramTypes: (a: Int64) (b: Int64): Int64 = a + b + let ptFn : PT.PackageFn.PackageFn = + { hash = PT.FQFnName.package "compiler-merge-selftest-add" + body = + PT.EInfix( + gid (), + PT.InfixFnCall PT.ArithmeticPlus, + PT.EArg(gid (), 0), + PT.EArg(gid (), 1)) + typeParams = [] + parameters = + NEList.ofList + ({ name = "a"; typ = PT.TInt64; description = "" } : PT.PackageFn.Parameter) + [ { name = "b"; typ = PT.TInt64; description = "" } ] + returnType = PT.TInt64 + description = "" } + match Bridge.bridgeFn "bridgedFn" ptFn with + | Error e -> outcome false $"bridge: {e}" |> Ply + | Ok fd -> + let program : AST.Program = + AST.Program + [ AST.FunctionDef fd + AST.Expression( + AST.Call( + "bridgedFn", + AST.NonEmptyList.fromList [ AST.Int64Literal 20L; AST.Int64Literal 22L ])) ] + match compileAst program with + | Error e -> outcome false $"compile: {e}" |> Ply + | Ok binary -> + let out = CompilerLibrary.execute 0 binary + if out.ExitCode = 0 then outcome true out.Stdout |> Ply + else outcome false $"exit {out.ExitCode}: {out.Stderr}" |> Ply + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps deprecated = NotDeprecated } ] let builtins () = LibExecution.Builtin.make [] (fns ()) diff --git a/backend/src/LibCompiler/CompilerLibrary.fs b/backend/src/LibCompiler/CompilerLibrary.fs index 87b991e3c7..0aebcb7a7c 100644 --- a/backend/src/LibCompiler/CompilerLibrary.fs +++ b/backend/src/LibCompiler/CompilerLibrary.fs @@ -1272,6 +1272,9 @@ type private UserCompilePlan = { Labels: UserCompileLabels SourceFile: string Source: string + /// When Some, the pipeline skips the text parser and uses this AST directly. + /// This is the seam the PT->AST bridge feeds (compiler-merge airlift, plan §6). + PrebuiltAst: AST.Program option } /// Parse source text into AST using a selected Darklang syntax @@ -1289,9 +1292,12 @@ let private compileUserWithPlan (plan: UserCompilePlan) : CompileReport = let sw = Stopwatch.StartNew() let result = try - // Pass 1: Parse user code only + // Pass 1: Parse user code only (or use a pre-built AST from the bridge) if plan.Verbosity >= 1 then println plan.Labels.Parse - let parseResult = parseProgram plan.SourceSyntax plan.AllowInternal plan.Source + let parseResult = + match plan.PrebuiltAst with + | Some ast -> Ok ast + | None -> parseProgram plan.SourceSyntax plan.AllowInternal plan.Source let parseTime = sw.Elapsed.TotalMilliseconds recordPassTiming plan.PassTimingRecorder "Parse" parseTime if plan.Verbosity >= 2 then @@ -1718,6 +1724,7 @@ let private buildCompilePlan (request: CompileRequest) : UserCompilePlan = Labels = labelsForMode request.Mode SourceFile = request.SourceFile Source = request.Source + PrebuiltAst = None } /// Compile source code to binary (in-memory, no file I/O) @@ -1725,6 +1732,14 @@ let compile (request: CompileRequest) : CompileReport = let plan = buildCompilePlan request compileUserWithPlan plan +/// Compile a pre-built AST.Program (bridged from ProgramTypes), skipping the +/// text parser entirely. The request supplies context/mode/options; its Source +/// field is ignored. This is the entry the compiler-merge PT->AST bridge uses +/// (plan §6) so we never round-trip through the compiler's diverged parser. +let compileAstProgram (request: CompileRequest) (ast: AST.Program) : CompileReport = + let plan = { buildCompilePlan request with PrebuiltAst = Some ast } + compileUserWithPlan plan + /// Execute compiled binary and capture output let execute (verbosity: int) (binary: byte array) : ExecutionOutput = let sw = Stopwatch.StartNew() From d66c6bd31833c7b8a4b54250bcd2180c9011a719 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 17:06:32 -0400 Subject: [PATCH 078/172] compiler: compile a REAL stored package fn via the bridge, matching the interpreter MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Closes the minimal loop on a live entity (not a synthetic PT tree): `Builtin.compileFnByHash ` fetches a package fn's ProgramTypes from the DB-backed PT PackageManager (LibDB.PackageManager.pt), lowers it via the §6 bridge, compiles a call to it, runs native, returns (ok, output). Proven end to end: authored `Darklang.Test.addThree (a)(b)(c) = a + b + c`, then `compileFnByHash [20L;20L;2L]` -> (true, "42"), interpreter `addThree 20 20 2` -> 42. MATCH. Dark resolves a name to its hash natively, so this hash-keyed builtin is the seam a `dark compile` command sits on. Added a LibDB project reference for the PT package manager. --- .../Builtins.Compiler.fsproj | 2 + .../Builtins.Compiler/Libs/Compiler.fs | 49 +++++++++++++++++++ 2 files changed, 51 insertions(+) diff --git a/backend/src/Builtins/Builtins.Compiler/Builtins.Compiler.fsproj b/backend/src/Builtins/Builtins.Compiler/Builtins.Compiler.fsproj index 6f257ca5c2..82a26f22e7 100644 --- a/backend/src/Builtins/Builtins.Compiler/Builtins.Compiler.fsproj +++ b/backend/src/Builtins/Builtins.Compiler/Builtins.Compiler.fsproj @@ -19,6 +19,8 @@ + + diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 4fc2c60853..0ea0896741 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -163,6 +163,55 @@ let fns () : List = sqlSpec = NotQueryable previewable = Impure capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + { name = fn "compileFnByHash" 0 + typeParams = [] + parameters = + [ Param.make "hash" TString "content hash of a package function" + Param.make "args" (TList TInt64) "Int64 arguments to call the function with" ] + returnType = TTuple(TBool, TString, []) + description = + "Fetches a package function's ProgramTypes by hash, lowers it to compiler AST via the §6 bridge, compiles a call to it with , runs the native binary, and returns (true, ) or (false, ). Pure-core leaves only; anything the bridge can't lower hard-fails with an `unsupported-*` reason. (Dark resolves a name to its hash; this takes the hash.)" + fn = + (function + | _, _, _, [ DString hash; DList(_, argDvals) ] -> + uply { + let! fnOpt = LibDB.PackageManager.pt.getFn (PT.FQFnName.package hash) + match fnOpt with + | None -> return outcome false $"no package fn with hash {hash}" + | Some ptFn -> + let argLits = + argDvals + |> List.choose (fun d -> + match d with + | DInt64 n -> Some(AST.Int64Literal n) + | _ -> None) + if List.length argLits <> List.length argDvals then + return outcome false "only Int64 args are supported" + elif List.isEmpty argLits then + return outcome false "need >= 1 arg (nullary calls not yet supported)" + else + match Bridge.bridgeFn "bridgedFn" ptFn with + | Error e -> return outcome false $"bridge: {e}" + | Ok fd -> + let program : AST.Program = + AST.Program + [ AST.FunctionDef fd + AST.Expression( + AST.Call("bridgedFn", AST.NonEmptyList.fromList argLits)) ] + match compileAst program with + | Error e -> return outcome false $"compile: {e}" + | Ok binary -> + let out = CompilerLibrary.execute 0 binary + return + (if out.ExitCode = 0 then outcome true out.Stdout + else outcome false $"exit {out.ExitCode}: {out.Stderr}") + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps deprecated = NotDeprecated } ] let builtins () = LibExecution.Builtin.make [] (fns ()) From dcc1c85c8b7c620df5b1439e76fb5790be689b0a Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 17:13:38 -0400 Subject: [PATCH 079/172] compiler: `compileFnCheck` (compilability, no run) + first ranked blocker frontier MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit `Builtin.compileFnCheck ` is the `dark compile` semantic: fetch a package fn's ProgramTypes, bridge it, make it reachable with zero-valued args, compile (don't run), report (true, " bytes") or (false, ""). Bridge type hard-fails now emit short, rankable tags (TCustomType, TList, …) instead of dumping a multi-line F# record. First automated §4-style frontier over 40 random package fns (+ a pure-Int control): 1 compiles; ranked blockers — 27 unsupported-type: TCustomType (custom types in signatures — the wall) 5 unsupported-expr: EApply (cross-fn calls) 4 unsupported-type: TList 2 unsupported-generics 1 TUuid / EMatch Matches COVERAGE-BASELINE's thesis: real CLI code is custom-types + glue, not arithmetic. The roadmap writes itself — TCustomType, then EApply, then List. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 13 ++++- .../Builtins.Compiler/Libs/Compiler.fs | 58 +++++++++++++++++++ 2 files changed, 70 insertions(+), 1 deletion(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index f96e768a99..ce4dce9fef 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -53,7 +53,18 @@ let rec bridgeType (t : PT.TypeReference) : Result = | PT.TFloat -> Ok AST.TFloat64 | PT.TChar -> Ok AST.TChar | PT.TUnit -> Ok AST.TUnit - | other -> err "type" (string other) + // Clean, short blocker tags (the raw `string` dump of e.g. TCustomType is a + // multi-line record — useless as a rankable blocker key). + | PT.TCustomType _ -> err "type" "TCustomType" + | PT.TList _ -> err "type" "TList" + | PT.TTuple _ -> err "type" "TTuple" + | PT.TDict _ -> err "type" "TDict" + | PT.TFn _ -> err "type" "TFn" + | PT.TDB _ -> err "type" "TDB" + | PT.TVariable v -> err "type" $"TVariable {v}" + | PT.TUuid -> err "type" "TUuid" + | PT.TDateTime -> err "type" "TDateTime" + | other -> err "type" (other.GetType().Name) // --------------------------------------------------------------------------- // Infix operators diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 0ea0896741..6e6f2a5fa8 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -59,6 +59,27 @@ let private compileAst (program : AST.Program) : Result = let private outcome (ok : bool) (detail : string) : Dval = DTuple(DBool ok, DString detail, []) +/// A zero/default literal for a compiler type, so a function can be made +/// reachable (called) to check that it actually compiles, without real args. +let rec private zeroLit (t : AST.Type) : Result = + match t with + | AST.TInt64 -> Ok(AST.Int64Literal 0L) + | AST.TInt8 -> Ok(AST.Int8Literal 0y) + | AST.TInt16 -> Ok(AST.Int16Literal 0s) + | AST.TInt32 -> Ok(AST.Int32Literal 0l) + | AST.TInt128 -> Ok(AST.Int128Literal System.Int128.Zero) + | AST.TUInt8 -> Ok(AST.UInt8Literal 0uy) + | AST.TUInt16 -> Ok(AST.UInt16Literal 0us) + | AST.TUInt32 -> Ok(AST.UInt32Literal 0ul) + | AST.TUInt64 -> Ok(AST.UInt64Literal 0UL) + | AST.TUInt128 -> Ok(AST.UInt128Literal System.UInt128.Zero) + | AST.TBool -> Ok(AST.BoolLiteral false) + | AST.TString -> Ok(AST.StringLiteral "") + | AST.TFloat64 -> Ok(AST.FloatLiteral 0.0) + | AST.TChar -> Ok(AST.CharLiteral "a") + | AST.TUnit -> Ok AST.UnitLiteral + | other -> Error $"no zero literal for {other}" + let fns () : List = [ { name = fn "compilerInfo" 0 typeParams = [] @@ -212,6 +233,43 @@ let fns () : List = sqlSpec = NotQueryable previewable = Impure capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + { name = fn "compileFnCheck" 0 + typeParams = [] + parameters = [ Param.make "hash" TString "content hash of a package function" ] + returnType = TTuple(TBool, TString, []) + description = + "Checks whether a package function compiles via the §6 bridge, WITHOUT running it: fetches its ProgramTypes by hash, lowers to compiler AST, makes it reachable with zero-valued args, and compiles. Returns (true, \" bytes\") if it compiles or (false, \"\") with the first blocker. This is the `dark compile` semantic (compilability, not execution)." + fn = + (function + | _, _, _, [ DString hash ] -> + uply { + let! fnOpt = LibDB.PackageManager.pt.getFn (PT.FQFnName.package hash) + match fnOpt with + | None -> return outcome false $"no package fn with hash {hash}" + | Some ptFn -> + match Bridge.bridgeFn "bridgedFn" ptFn with + | Error e -> return outcome false e + | Ok fd -> + let dummyArgs = fd.Params |> AST.NonEmptyList.toList |> List.map (snd >> zeroLit) + match List.tryPick (function Error e -> Some e | Ok _ -> None) dummyArgs with + | Some e -> return outcome false $"arg-synthesis: {e}" + | None -> + let args = dummyArgs |> List.choose (function Ok x -> Some x | Error _ -> None) + let program : AST.Program = + AST.Program + [ AST.FunctionDef fd + AST.Expression( + AST.Call("bridgedFn", AST.NonEmptyList.fromList args)) ] + match compileAst program with + | Ok binary -> return outcome true $"{binary.Length} bytes" + | Error e -> return outcome false e + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps deprecated = NotDeprecated } ] let builtins () = LibExecution.Builtin.make [] (fns ()) From 14379c81c32e72ffb9c3162fea35aab058b4761d Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 21:43:17 -0400 Subject: [PATCH 080/172] compiler: bridge whole pure call-graphs (EApply cross-fn calls) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The #2 blocker (EApply). A direct call to a package fn now lowers to AST.Call; the builtin walks the call graph — fetching and bridging every transitively called package fn — and compiles the whole set together (the compiler already handles mutual recursion, so order doesn't matter). Builtin calls, unresolved names, higher-order applies, and generic call sites still hard-fail with clean tags (unsupported-builtin/-call/-expr/-generics). Proven: authored `callsAdd (a) = addThree a a a`; compileFnCheck -> (true, "568 bytes"), compileFnByHash callsAdd [5] -> (true, "15") == interpreter 15. The bridge pulled `addThree`'s FunctionDef in automatically. - Bridge.fs: `nameFor` (hash->ident), `referencedPackageFns` (call-graph walk), real EApply(EFnName Package) handling. - Libs/Compiler.fs: `walkGraph`/`bridgeClosure` (transitive fetch+bridge) + `compileClosure`; compileFnByHash/compileFnCheck now compile the closure. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 51 +++++++- .../Builtins.Compiler/Libs/Compiler.fs | 118 +++++++++++------- 2 files changed, 122 insertions(+), 47 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index ce4dce9fef..55a147d158 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -88,10 +88,15 @@ let private bridgeInfix (op : PT.Infix) : Result = | PT.BinOp PT.BinOpAnd -> Ok AST.And | PT.BinOp PT.BinOpOr -> Ok AST.Or +/// Deterministic compiler-side identifier for a package fn, from its content +/// hash. Used to name each bridged FunctionDef and every call to it, so a whole +/// call-graph lowers with consistent names. +let nameFor (hash : string) : string = "fn_" + hash + // --------------------------------------------------------------------------- // Expressions // -// `paramNames.[i]` gives the compiler-side name for the i-th parameter; Dark +// `paramNames[i]` gives the compiler-side name for the i-th parameter; Dark // bodies reference params positionally via EArg(id, index). // --------------------------------------------------------------------------- @@ -128,8 +133,25 @@ let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result Result.bind (fun v -> recurse body |> Result.map (fun b -> AST.Let(name, v, b))) | PT.ELet(_, _, _, _) -> err "let" "non-variable let pattern" - // Deliberately unsupported for the leaf subset (each is a ranked blocker): - | PT.EApply(_, _, _, _) -> err "expr" "EApply (cross-fn call)" + // Cross-fn calls: a direct call to a package fn lowers to AST.Call; the + // callee itself is bridged separately (the builtin walks the call graph). + | PT.EApply(_, PT.EFnName(_, nr), typeArgs, args) -> + if not (List.isEmpty typeArgs) then + err "generics" "type args at call site" + else + match nr.resolved with + | Error _ -> err "call" "unresolved fn name" + | Ok resolved -> + match resolved.name with + | PT.FQFnName.Builtin b -> err "builtin" $"{b.name}_v{b.version}" + | PT.FQFnName.Package(PT.Hash h) -> + args + |> NEList.toList + |> List.map recurse + |> allOk + |> Result.map (fun bridged -> + AST.Call(nameFor h, AST.NonEmptyList.fromList bridged)) + | PT.EApply(_, _, _, _) -> err "expr" "EApply of a non-fn-name (higher-order)" | PT.EMatch(_, _, _) -> err "expr" "EMatch" | PT.EList(_, _) -> err "expr" "EList" | PT.ETuple(_, _, _, _) -> err "expr" "ETuple" @@ -167,3 +189,26 @@ let bridgeFn Params = AST.NonEmptyList.fromList ps ReturnType = retType Body = body } : AST.FunctionDef)))) + +/// The package-fn hashes a body calls directly (over the supported subset), +/// so the builtin can walk the call graph and bridge every callee. Only needs +/// to be correct for nodes bridgeExpr supports — an unsupported node hard-fails +/// during bridging anyway. +let rec referencedPackageFns (e : PT.Expr) : List = + let r = referencedPackageFns + match e with + | PT.EInfix(_, _, l, rhs) -> r l @ r rhs + | PT.EIf(_, c, t, Some el) -> r c @ r t @ r el + | PT.EIf(_, c, t, None) -> r c @ r t + | PT.ELet(_, _, v, body) -> r v @ r body + | PT.EApply(_, PT.EFnName(_, nr), _, args) -> + let here = + match nr.resolved with + | Ok resolved -> + match resolved.name with + | PT.FQFnName.Package(PT.Hash h) -> [ h ] + | _ -> [] + | Error _ -> [] + here @ (args |> NEList.toList |> List.collect r) + | PT.EApply(_, f, _, args) -> r f @ (args |> NEList.toList |> List.collect r) + | _ -> [] diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 6e6f2a5fa8..c85912f68b 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -55,6 +55,47 @@ let private compileAst (program : AST.Program) : Result = PassTimingRecorder = None } (CompilerLibrary.compileAstProgram request program).Result +/// Walk a package fn's call graph, fetching and bridging every transitively +/// called package fn. Returns all FunctionDefs (root + callees) or the first +/// hard-fail. Builtin calls / unresolved names / unsupported nodes fail here. +let rec private walkGraph + (visited : Set) + (acc : List) + (worklist : List) + : Ply, string>> = + uply { + match worklist with + | [] -> return Ok acc + | h :: rest -> + if Set.contains h visited then + return! walkGraph visited acc rest + else + let! fnOpt = LibDB.PackageManager.pt.getFn (PT.FQFnName.package h) + match fnOpt with + | None -> return Error $"missing dependency fn {h}" + | Some ptFn -> + match Bridge.bridgeFn (Bridge.nameFor h) ptFn with + | Error e -> return Error e + | Ok fd -> + let deps = Bridge.referencedPackageFns ptFn.body + return! walkGraph (Set.add h visited) (acc @ [ fd ]) (rest @ deps) + } + +let private bridgeClosure (rootHash : string) : Ply, string>> = + walkGraph Set.empty [] [ rootHash ] + +/// Build the program (all bridged fns + a call to the root) and compile it. +let private compileClosure + (fds : List) + (rootName : string) + (args : List) + : Result = + let program : AST.Program = + AST.Program( + (fds |> List.map AST.FunctionDef) + @ [ AST.Expression(AST.Call(rootName, AST.NonEmptyList.fromList args)) ]) + compileAst program + /// Return a (Bool ok, String detail) tuple as a Dark value. let private outcome (ok : bool) (detail : string) : Dval = DTuple(DBool ok, DString detail, []) @@ -198,36 +239,28 @@ let fns () : List = (function | _, _, _, [ DString hash; DList(_, argDvals) ] -> uply { - let! fnOpt = LibDB.PackageManager.pt.getFn (PT.FQFnName.package hash) - match fnOpt with - | None -> return outcome false $"no package fn with hash {hash}" - | Some ptFn -> - let argLits = - argDvals - |> List.choose (fun d -> - match d with - | DInt64 n -> Some(AST.Int64Literal n) - | _ -> None) - if List.length argLits <> List.length argDvals then - return outcome false "only Int64 args are supported" - elif List.isEmpty argLits then - return outcome false "need >= 1 arg (nullary calls not yet supported)" - else - match Bridge.bridgeFn "bridgedFn" ptFn with - | Error e -> return outcome false $"bridge: {e}" - | Ok fd -> - let program : AST.Program = - AST.Program - [ AST.FunctionDef fd - AST.Expression( - AST.Call("bridgedFn", AST.NonEmptyList.fromList argLits)) ] - match compileAst program with - | Error e -> return outcome false $"compile: {e}" - | Ok binary -> - let out = CompilerLibrary.execute 0 binary - return - (if out.ExitCode = 0 then outcome true out.Stdout - else outcome false $"exit {out.ExitCode}: {out.Stderr}") + let argLits = + argDvals + |> List.choose (fun d -> + match d with + | DInt64 n -> Some(AST.Int64Literal n) + | _ -> None) + if List.length argLits <> List.length argDvals then + return outcome false "only Int64 args are supported" + elif List.isEmpty argLits then + return outcome false "need >= 1 arg (nullary calls not yet supported)" + else + let! closure = bridgeClosure hash + match closure with + | Error e -> return outcome false e + | Ok fds -> + match compileClosure fds (Bridge.nameFor hash) argLits with + | Error e -> return outcome false $"compile: {e}" + | Ok binary -> + let out = CompilerLibrary.execute 0 binary + return + (if out.ExitCode = 0 then outcome true out.Stdout + else outcome false $"exit {out.ExitCode}: {out.Stderr}") } | _ -> incorrectArgs ()) sqlSpec = NotQueryable @@ -245,24 +278,21 @@ let fns () : List = (function | _, _, _, [ DString hash ] -> uply { - let! fnOpt = LibDB.PackageManager.pt.getFn (PT.FQFnName.package hash) - match fnOpt with - | None -> return outcome false $"no package fn with hash {hash}" - | Some ptFn -> - match Bridge.bridgeFn "bridgedFn" ptFn with - | Error e -> return outcome false e - | Ok fd -> - let dummyArgs = fd.Params |> AST.NonEmptyList.toList |> List.map (snd >> zeroLit) + let rootName = Bridge.nameFor hash + let! closure = bridgeClosure hash + match closure with + | Error e -> return outcome false e + | Ok fds -> + match fds |> List.tryFind (fun fd -> fd.Name = rootName) with + | None -> return outcome false "root fn not bridged" + | Some rootFd -> + let dummyArgs = + rootFd.Params |> AST.NonEmptyList.toList |> List.map (snd >> zeroLit) match List.tryPick (function Error e -> Some e | Ok _ -> None) dummyArgs with | Some e -> return outcome false $"arg-synthesis: {e}" | None -> let args = dummyArgs |> List.choose (function Ok x -> Some x | Error _ -> None) - let program : AST.Program = - AST.Program - [ AST.FunctionDef fd - AST.Expression( - AST.Call("bridgedFn", AST.NonEmptyList.fromList args)) ] - match compileAst program with + match compileClosure fds rootName args with | Ok binary -> return outcome true $"{binary.Length} bytes" | Error e -> return outcome false e } From 879f0835427ff42b95686e8c5d722f429e033ebb Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 21:49:35 -0400 Subject: [PATCH 081/172] =?UTF-8?q?compiler:=20batch=20coverage=20sweep=20?= =?UTF-8?q?=E2=80=94=20the=20=C2=A74=20bring-up=20loop=20in=20one=20proces?= =?UTF-8?q?s?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit `Builtin.compilerCoverageSweep ` compile-checks every fn hash in a single process (stdlib built once) and returns a `|` line per hash. This turns the per-process `compileFnCheck` loop into a real bring-up run. Factored `checkOne` (shared with compileFnCheck) with a per-fn try/with so one bad fn can't abort the sweep. First whole-tree-scale run — 500 real package fns in ~5s: COMPILED: 21 / 500 (pure-core string/render leaves: bold/dim/italic, Cli.Docs.*.content, …) BLOCKERS (ranked): 343 TCustomType (68% — the wall, custom types in signatures) 43 TList 15 EValue 14 TUuid 13 generics 9 EString interpolation / 9 EMatch / 4 EStatement / 4 EPipe / builtins The roadmap is now data, not guesswork: TCustomType is the single highest-unlock target by a wide margin, then TList, then the smaller glue/value/match items. --- .../Builtins.Compiler/Libs/Compiler.fs | 80 ++++++++++++++----- 1 file changed, 59 insertions(+), 21 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index c85912f68b..9f1a3a6d59 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -96,10 +96,6 @@ let private compileClosure @ [ AST.Expression(AST.Call(rootName, AST.NonEmptyList.fromList args)) ]) compileAst program -/// Return a (Bool ok, String detail) tuple as a Dark value. -let private outcome (ok : bool) (detail : string) : Dval = - DTuple(DBool ok, DString detail, []) - /// A zero/default literal for a compiler type, so a function can be made /// reachable (called) to check that it actually compiles, without real args. let rec private zeroLit (t : AST.Type) : Result = @@ -121,6 +117,37 @@ let rec private zeroLit (t : AST.Type) : Result = | AST.TUnit -> Ok AST.UnitLiteral | other -> Error $"no zero literal for {other}" +/// Compile-check one package fn by hash (bridge its call-graph, make it +/// reachable with zero-valued args, compile — don't run). Returns (ok, detail). +/// Wrapped so an unexpected crash in one fn can't abort a batch sweep. +let private checkOne (hash : string) : Ply = + uply { + try + let rootName = Bridge.nameFor hash + let! closure = bridgeClosure hash + match closure with + | Error e -> return (false, e) + | Ok fds -> + match fds |> List.tryFind (fun fd -> fd.Name = rootName) with + | None -> return (false, "root fn not bridged") + | Some rootFd -> + let dummy = + rootFd.Params |> AST.NonEmptyList.toList |> List.map (snd >> zeroLit) + match List.tryPick (function Error e -> Some e | Ok _ -> None) dummy with + | Some e -> return (false, $"arg-synthesis: {e}") + | None -> + let args = dummy |> List.choose (function Ok x -> Some x | Error _ -> None) + match compileClosure fds rootName args with + | Ok binary -> return (true, $"{binary.Length} bytes") + | Error e -> return (false, e) + with e -> + return (false, $"exn: {e.Message}") + } + +/// Return a (Bool ok, String detail) tuple as a Dark value. +let private outcome (ok : bool) (detail : string) : Dval = + DTuple(DBool ok, DString detail, []) + let fns () : List = [ { name = fn "compilerInfo" 0 typeParams = [] @@ -278,23 +305,34 @@ let fns () : List = (function | _, _, _, [ DString hash ] -> uply { - let rootName = Bridge.nameFor hash - let! closure = bridgeClosure hash - match closure with - | Error e -> return outcome false e - | Ok fds -> - match fds |> List.tryFind (fun fd -> fd.Name = rootName) with - | None -> return outcome false "root fn not bridged" - | Some rootFd -> - let dummyArgs = - rootFd.Params |> AST.NonEmptyList.toList |> List.map (snd >> zeroLit) - match List.tryPick (function Error e -> Some e | Ok _ -> None) dummyArgs with - | Some e -> return outcome false $"arg-synthesis: {e}" - | None -> - let args = dummyArgs |> List.choose (function Ok x -> Some x | Error _ -> None) - match compileClosure fds rootName args with - | Ok binary -> return outcome true $"{binary.Length} bytes" - | Error e -> return outcome false e + let! (ok, detail) = checkOne hash + return outcome ok detail + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + { name = fn "compilerCoverageSweep" 0 + typeParams = [] + parameters = + [ Param.make "hashes" (TList TString) "package fn content hashes to compile-check" ] + returnType = TString + description = + "The §4 bring-up loop, in ONE process (stdlib built once): compile-checks every fn hash and returns a newline-joined report, one `|` line per input hash in order (ok = true/false). Feed it every fn hash to get a whole-tree coverage number + ranked blockers without the per-process stdlib rebuild." + fn = + (function + | _, _, _, [ DList(_, hashes) ] -> + uply { + let mutable lines : List = [] + for hd in hashes do + match hd with + | DString hash -> + let! (ok, detail) = checkOne hash + lines <- lines @ [ $"{ok}|{detail}" ] + | _ -> lines <- lines @ [ "false|non-string-hash" ] + return DString(String.concat "\n" lines) } | _ -> incorrectArgs ()) sqlSpec = NotQueryable From 9dde3e00321c3f535e2138a640177bd1714cddce Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 23:01:36 -0400 Subject: [PATCH 082/172] =?UTF-8?q?compiler:=20bridge=20non-generic=20cust?= =?UTF-8?q?om=20types=20(records=20+=20enums)=20=E2=80=94=20the=2062%=20bl?= =?UTF-8?q?ocker?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Attacks TCustomType (2406/3900, 62% of all blockers). The bridge now carries a type environment (hash -> record|sum) that the builtin builds by fetching the transitive type-def closure alongside the fn call-graph: - Bridge.fs: bridgeType lowers TCustomType -> TRecord/TSum by hash; bridgeTypeDef lowers non-generic record/enum PackageTypes -> AST.RecordDef/SumTypeDef (multi-field enum cases -> a tuple payload). bridgeExpr adds ERecord -> RecordLiteral, ERecordFieldAccess -> RecordAccess, EEnum -> Constructor. typeRefsInType/Expr/Fn/TypeDef collect the type closure. Generic types, aliases, and EMatch still hard-fail cleanly. - Libs/Compiler.fs: buildPieces fetches the fn closure, then the type closure, builds the type env, and bridges type defs + fns together; compileClosure prepends the TypeDefs to the program. Proven: `pointX (a)(b) = let p = Point {x=a;y=b} in p.x` -> compiles, run(7,9)=7 == interp 7. `mkCircle (a) = Shape.Circle a` (enum construction) compiles. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 199 ++++++++++++++++-- .../Builtins.Compiler/Libs/Compiler.fs | 118 ++++++++--- 2 files changed, 270 insertions(+), 47 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 55a147d158..1c11637016 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -6,9 +6,14 @@ module Builtins.Compiler.Bridge // hard-fail (never a guess, never a silent drop). Each `Error` string is a // blocker record: "unsupported-: " — greppable and rank-able. // -// Scope today: the pure-core leaf subset (Int/Bool arithmetic, let, if, vars, -// params). Expands reactively, driven by which hard-fails block the most -// entities — not speculatively. +// Scope: Int/Bool/String/Char arithmetic + if/let/vars/params, cross-fn calls +// (whole call-graph), and NON-generic custom types (records + enums: type defs, +// construction, field access). Still hard-failing: pattern match (EMatch), +// generics, lists/tuples/dicts, pipes, lambdas, builtins. +// +// `isSum` (below) is the type environment: a map from a custom type's content +// hash to whether it's a sum type (true) or record (false). The builtin builds +// it by fetching the transitive type-def closure; only types in the map lower. open Prelude @@ -28,11 +33,39 @@ let private allOk (results : List>) : Result, string | Ok _, Error e -> Error e | Ok xs, Ok x -> Ok(xs @ [ x ])) +/// Deterministic compiler-side identifier for a package fn / type, from its +/// content hash — so a whole call/type graph lowers with consistent names. +let nameFor (hash : string) : string = "fn_" + hash +let nameForType (hash : string) : string = "T_" + hash + +/// The package-type hash a type-name resolution points at. +let private typeHash + (nr : PT.NameResolution) + : Result = + match nr.resolved with + | Error _ -> err "type" "unresolved type name" + | Ok resolved -> + match resolved.name with + | PT.FQTypeName.Package(PT.Hash h) -> Ok h + +let private typeHashOpt + (nr : PT.NameResolution) + : List = + match nr.resolved with + | Ok resolved -> + match resolved.name with + | PT.FQTypeName.Package(PT.Hash h) -> [ h ] + | Error _ -> [] + // --------------------------------------------------------------------------- // Types // --------------------------------------------------------------------------- -let rec bridgeType (t : PT.TypeReference) : Result = +let rec bridgeType + (isSum : Map) + (t : PT.TypeReference) + : Result = + let recurse = bridgeType isSum match t with | PT.TInt64 -> Ok AST.TInt64 | PT.TInt8 -> Ok AST.TInt8 @@ -45,17 +78,26 @@ let rec bridgeType (t : PT.TypeReference) : Result = | PT.TUInt64 -> Ok AST.TUInt64 | PT.TUInt128 -> Ok AST.TUInt128 // Dark's default Int is arbitrary-precision; the compiler has no bigint, so - // we lower it to Int64. Sound for values in range (which a pure-core leaf's - // literals/params are); wrapping semantics would differ at the Int64 edges. + // we lower it to Int64. Sound for values in range; wraps at the Int64 edges. | PT.TInt -> Ok AST.TInt64 | PT.TBool -> Ok AST.TBool | PT.TString -> Ok AST.TString | PT.TFloat -> Ok AST.TFloat64 | PT.TChar -> Ok AST.TChar | PT.TUnit -> Ok AST.TUnit - // Clean, short blocker tags (the raw `string` dump of e.g. TCustomType is a - // multi-line record — useless as a rankable blocker key). - | PT.TCustomType _ -> err "type" "TCustomType" + | PT.TCustomType(nr, typeArgs) -> + typeHash nr + |> Result.bind (fun h -> + match Map.tryFind h isSum with + // Not in the type env => generic / alias / unfetched: hard-fail cleanly. + | None -> err "type" "TCustomType" + | Some sum -> + typeArgs + |> List.map recurse + |> allOk + |> Result.map (fun args -> + if sum then AST.TSum(nameForType h, args) + else AST.TRecord(nameForType h, args))) | PT.TList _ -> err "type" "TList" | PT.TTuple _ -> err "type" "TTuple" | PT.TDict _ -> err "type" "TDict" @@ -88,11 +130,6 @@ let private bridgeInfix (op : PT.Infix) : Result = | PT.BinOp PT.BinOpAnd -> Ok AST.And | PT.BinOp PT.BinOpOr -> Ok AST.Or -/// Deterministic compiler-side identifier for a package fn, from its content -/// hash. Used to name each bridged FunctionDef and every call to it, so a whole -/// call-graph lowers with consistent names. -let nameFor (hash : string) : string = "fn_" + hash - // --------------------------------------------------------------------------- // Expressions // @@ -100,6 +137,14 @@ let nameFor (hash : string) : string = "fn_" + hash // bodies reference params positionally via EArg(id, index). // --------------------------------------------------------------------------- +/// Multi-field enum payloads / record constructions become a single tuple +/// payload on the compiler side (its Constructor takes one optional payload). +let private tuplePayload (xs : List) : AST.Expr option = + match xs with + | [] -> None + | [ x ] -> Some x + | many -> Some(AST.TupleLiteral many) + let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result = let recurse = bridgeExpr paramNames match e with @@ -133,6 +178,30 @@ let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result Result.bind (fun v -> recurse body |> Result.map (fun b -> AST.Let(name, v, b))) | PT.ELet(_, _, _, _) -> err "let" "non-variable let pattern" + // Records + | PT.ERecord(_, nr, typeArgs, fields) -> + if not (List.isEmpty typeArgs) then + err "generics" "type args on record literal" + else + typeHash nr + |> Result.bind (fun h -> + fields + |> List.map (fun (fname, fexpr) -> recurse fexpr |> Result.map (fun be -> (fname, be))) + |> allOk + |> Result.map (fun fs -> AST.RecordLiteral(nameForType h, fs))) + | PT.ERecordFieldAccess(_, record, fieldName) -> + recurse record |> Result.map (fun r -> AST.RecordAccess(r, fieldName)) + // Enum construction + | PT.EEnum(_, nr, typeArgs, caseName, fields) -> + if not (List.isEmpty typeArgs) then + err "generics" "type args on enum construction" + else + typeHash nr + |> Result.bind (fun h -> + fields + |> List.map recurse + |> allOk + |> Result.map (fun fs -> AST.Constructor(nameForType h, caseName, tuplePayload fs))) // Cross-fn calls: a direct call to a package fn lowers to AST.Call; the // callee itself is bridged separately (the builtin walks the call graph). | PT.EApply(_, PT.EFnName(_, nr), typeArgs, args) -> @@ -158,6 +227,47 @@ let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result err "expr" "EPipe" | _ -> err "expr" (e.GetType().Name) +// --------------------------------------------------------------------------- +// Type definitions +// --------------------------------------------------------------------------- + +/// Lower a package type (non-generic record/enum) to a compiler TypeDef under +/// the given compiler-side name. +let bridgeTypeDef + (isSum : Map) + (name : string) + (pt : PT.PackageType.PackageType) + : Result = + let d = pt.declaration + if not (List.isEmpty d.typeParams) then + err "generics" "generic type definition" + else + match d.definition with + | PT.TypeDeclaration.Alias _ -> err "type" "type alias" + | PT.TypeDeclaration.Record fields -> + fields + |> NEList.toList + |> List.map (fun (f : PT.TypeDeclaration.RecordField) -> + bridgeType isSum f.typ |> Result.map (fun t -> (f.name, t))) + |> allOk + |> Result.map (fun fs -> AST.RecordDef(name, [], fs)) + | PT.TypeDeclaration.Enum cases -> + cases + |> NEList.toList + |> List.map (fun (c : PT.TypeDeclaration.EnumCase) -> + c.fields + |> List.map (fun (ef : PT.TypeDeclaration.EnumField) -> bridgeType isSum ef.typ) + |> allOk + |> Result.map (fun fieldTypes -> + let payload = + match fieldTypes with + | [] -> None + | [ t ] -> Some t + | ts -> Some(AST.TTuple ts) + ({ Name = c.name; Payload = payload } : AST.Variant))) + |> allOk + |> Result.map (fun variants -> AST.SumTypeDef(name, [], variants)) + // --------------------------------------------------------------------------- // Functions // --------------------------------------------------------------------------- @@ -166,6 +276,7 @@ let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result) (compiledName : string) (fn : PT.PackageFn.PackageFn) : Result = @@ -176,11 +287,11 @@ let bridgeFn let paramNames = paramList |> List.map (fun p -> p.name) |> Array.ofList let bridgedParams = paramList - |> List.map (fun p -> bridgeType p.typ |> Result.map (fun t -> (p.name, t))) + |> List.map (fun p -> bridgeType isSum p.typ |> Result.map (fun t -> (p.name, t))) |> allOk bridgedParams |> Result.bind (fun ps -> - bridgeType fn.returnType + bridgeType isSum fn.returnType |> Result.bind (fun retType -> bridgeExpr paramNames fn.body |> Result.map (fun body -> @@ -190,10 +301,11 @@ let bridgeFn ReturnType = retType Body = body } : AST.FunctionDef)))) -/// The package-fn hashes a body calls directly (over the supported subset), -/// so the builtin can walk the call graph and bridge every callee. Only needs -/// to be correct for nodes bridgeExpr supports — an unsupported node hard-fails -/// during bridging anyway. +// --------------------------------------------------------------------------- +// Reference collectors (for the transitive fetch closures in the builtin) +// --------------------------------------------------------------------------- + +/// The package-fn hashes a body calls directly (over the supported subset). let rec referencedPackageFns (e : PT.Expr) : List = let r = referencedPackageFns match e with @@ -201,14 +313,59 @@ let rec referencedPackageFns (e : PT.Expr) : List = | PT.EIf(_, c, t, Some el) -> r c @ r t @ r el | PT.EIf(_, c, t, None) -> r c @ r t | PT.ELet(_, _, v, body) -> r v @ r body + | PT.ERecord(_, _, _, fields) -> fields |> List.collect (snd >> r) + | PT.ERecordFieldAccess(_, record, _) -> r record + | PT.EEnum(_, _, _, _, fields) -> fields |> List.collect r | PT.EApply(_, PT.EFnName(_, nr), _, args) -> let here = match nr.resolved with | Ok resolved -> match resolved.name with | PT.FQFnName.Package(PT.Hash h) -> [ h ] - | _ -> [] + | PT.FQFnName.Builtin _ -> [] | Error _ -> [] here @ (args |> NEList.toList |> List.collect r) | PT.EApply(_, f, _, args) -> r f @ (args |> NEList.toList |> List.collect r) | _ -> [] + +/// The custom-type hashes a TypeReference mentions. +let rec typeRefsInType (t : PT.TypeReference) : List = + let r = typeRefsInType + match t with + | PT.TCustomType(nr, args) -> typeHashOpt nr @ List.collect r args + | PT.TList inner -> r inner + | PT.TTuple(a, b, rest) -> r a @ r b @ List.collect r rest + | PT.TDict inner -> r inner + | PT.TFn(args, ret) -> (NEList.toList args |> List.collect r) @ r ret + | _ -> [] + +/// The custom-type hashes a body mentions (record/enum constructions). +let rec typeRefsInExpr (e : PT.Expr) : List = + let r = typeRefsInExpr + match e with + | PT.ERecord(_, nr, _, fields) -> typeHashOpt nr @ (fields |> List.collect (snd >> r)) + | PT.EEnum(_, nr, _, _, fields) -> typeHashOpt nr @ (fields |> List.collect r) + | PT.ERecordFieldAccess(_, record, _) -> r record + | PT.EInfix(_, _, l, rhs) -> r l @ r rhs + | PT.EIf(_, c, t, Some el) -> r c @ r t @ r el + | PT.EIf(_, c, t, None) -> r c @ r t + | PT.ELet(_, _, v, body) -> r v @ r body + | PT.EApply(_, f, _, args) -> r f @ (args |> NEList.toList |> List.collect r) + | _ -> [] + +/// The custom-type hashes a whole package fn mentions (signature + body). +let typeRefsInFn (fn : PT.PackageFn.PackageFn) : List = + (fn.parameters |> NEList.toList |> List.collect (fun p -> typeRefsInType p.typ)) + @ typeRefsInType fn.returnType + @ typeRefsInExpr fn.body + +/// The custom-type hashes a type definition mentions (field/case types). +let typeRefsInTypeDef (pt : PT.PackageType.PackageType) : List = + match pt.declaration.definition with + | PT.TypeDeclaration.Alias t -> typeRefsInType t + | PT.TypeDeclaration.Record fields -> + fields |> NEList.toList |> List.collect (fun f -> typeRefsInType f.typ) + | PT.TypeDeclaration.Enum cases -> + cases + |> NEList.toList + |> List.collect (fun c -> c.fields |> List.collect (fun ef -> typeRefsInType ef.typ)) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 9f1a3a6d59..9f8150c07b 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -55,44 +55,111 @@ let private compileAst (program : AST.Program) : Result = PassTimingRecorder = None } (CompilerLibrary.compileAstProgram request program).Result -/// Walk a package fn's call graph, fetching and bridging every transitively -/// called package fn. Returns all FunctionDefs (root + callees) or the first -/// hard-fail. Builtin calls / unresolved names / unsupported nodes fail here. -let rec private walkGraph +let private allOk (rs : List>) : Result, string> = + (Ok [], rs) + ||> List.fold (fun acc r -> + match acc, r with + | Error e, _ -> Error e + | Ok _, Error e -> Error e + | Ok xs, Ok x -> Ok(xs @ [ x ])) + +/// Fetch a package fn's transitive call graph (PT fns only — no bridging yet, +/// since bridging needs the type env which we build afterwards). +let rec private fetchFnClosure (visited : Set) - (acc : List) + (acc : List) (worklist : List) - : Ply, string>> = + : Ply, string>> = uply { match worklist with | [] -> return Ok acc | h :: rest -> if Set.contains h visited then - return! walkGraph visited acc rest + return! fetchFnClosure visited acc rest else let! fnOpt = LibDB.PackageManager.pt.getFn (PT.FQFnName.package h) match fnOpt with | None -> return Error $"missing dependency fn {h}" | Some ptFn -> - match Bridge.bridgeFn (Bridge.nameFor h) ptFn with - | Error e -> return Error e - | Ok fd -> - let deps = Bridge.referencedPackageFns ptFn.body - return! walkGraph (Set.add h visited) (acc @ [ fd ]) (rest @ deps) + let deps = Bridge.referencedPackageFns ptFn.body + return! fetchFnClosure (Set.add h visited) (acc @ [ (h, ptFn) ]) (rest @ deps) } -let private bridgeClosure (rootHash : string) : Ply, string>> = - walkGraph Set.empty [] [ rootHash ] +/// Fetch the transitive closure of custom types referenced by the seeds. +let rec private fetchTypeClosure + (visited : Set) + (acc : List) + (worklist : List) + : Ply, string>> = + uply { + match worklist with + | [] -> return Ok acc + | h :: rest -> + if Set.contains h visited then + return! fetchTypeClosure visited acc rest + else + let! tOpt = LibDB.PackageManager.pt.getType (PT.FQTypeName.package h) + match tOpt with + | None -> return Error $"missing type {h}" + | Some pt -> + let deps = Bridge.typeRefsInTypeDef pt + return! fetchTypeClosure (Set.add h visited) (acc @ [ (h, pt) ]) (rest @ deps) + } + +/// Fetch + bridge the whole graph (fns and their non-generic custom types), +/// returning the compiler TypeDefs, FunctionDefs, and the root's compiled name. +let private buildPieces + (rootHash : string) + : Ply * List * string, string>> = + uply { + let! fnClosure = fetchFnClosure Set.empty [] [ rootHash ] + match fnClosure with + | Error e -> return Error e + | Ok fns -> + let typeSeeds = + fns |> List.collect (fun (_, fn) -> Bridge.typeRefsInFn fn) |> List.distinct + let! typeClosure = fetchTypeClosure Set.empty [] typeSeeds + match typeClosure with + | Error e -> return Error e + | Ok types -> + // The type env: non-generic record (false) / enum (true) types only. + // Generic + alias types are omitted, so any fn using one hard-fails. + let isSum = + types + |> List.choose (fun (h, pt) -> + if List.isEmpty pt.declaration.typeParams then + match pt.declaration.definition with + | PT.TypeDeclaration.Record _ -> Some(h, false) + | PT.TypeDeclaration.Enum _ -> Some(h, true) + | PT.TypeDeclaration.Alias _ -> None + else + None) + |> Map.ofList + let typeDefs = + types + |> List.filter (fun (h, _) -> Map.containsKey h isSum) + |> List.map (fun (h, pt) -> Bridge.bridgeTypeDef isSum (Bridge.nameForType h) pt) + |> allOk + let fnDefs = + fns |> List.map (fun (h, fn) -> Bridge.bridgeFn isSum (Bridge.nameFor h) fn) |> allOk + match typeDefs, fnDefs with + | Error e, _ -> return Error e + | _, Error e -> return Error e + | Ok tds, Ok fds -> return Ok(tds, fds, Bridge.nameFor rootHash) + } -/// Build the program (all bridged fns + a call to the root) and compile it. +/// Build the program (type defs + all bridged fns + a call to the root) and +/// compile it. let private compileClosure + (typeDefs : List) (fds : List) (rootName : string) (args : List) : Result = let program : AST.Program = AST.Program( - (fds |> List.map AST.FunctionDef) + (typeDefs |> List.map AST.TypeDef) + @ (fds |> List.map AST.FunctionDef) @ [ AST.Expression(AST.Call(rootName, AST.NonEmptyList.fromList args)) ]) compileAst program @@ -123,11 +190,10 @@ let rec private zeroLit (t : AST.Type) : Result = let private checkOne (hash : string) : Ply = uply { try - let rootName = Bridge.nameFor hash - let! closure = bridgeClosure hash - match closure with + let! pieces = buildPieces hash + match pieces with | Error e -> return (false, e) - | Ok fds -> + | Ok(typeDefs, fds, rootName) -> match fds |> List.tryFind (fun fd -> fd.Name = rootName) with | None -> return (false, "root fn not bridged") | Some rootFd -> @@ -137,7 +203,7 @@ let private checkOne (hash : string) : Ply = | Some e -> return (false, $"arg-synthesis: {e}") | None -> let args = dummy |> List.choose (function Ok x -> Some x | Error _ -> None) - match compileClosure fds rootName args with + match compileClosure typeDefs fds rootName args with | Ok binary -> return (true, $"{binary.Length} bytes") | Error e -> return (false, e) with e -> @@ -232,7 +298,7 @@ let fns () : List = [ { name = "b"; typ = PT.TInt64; description = "" } ] returnType = PT.TInt64 description = "" } - match Bridge.bridgeFn "bridgedFn" ptFn with + match Bridge.bridgeFn Map.empty "bridgedFn" ptFn with | Error e -> outcome false $"bridge: {e}" |> Ply | Ok fd -> let program : AST.Program = @@ -277,11 +343,11 @@ let fns () : List = elif List.isEmpty argLits then return outcome false "need >= 1 arg (nullary calls not yet supported)" else - let! closure = bridgeClosure hash - match closure with + let! pieces = buildPieces hash + match pieces with | Error e -> return outcome false e - | Ok fds -> - match compileClosure fds (Bridge.nameFor hash) argLits with + | Ok(typeDefs, fds, rootName) -> + match compileClosure typeDefs fds rootName argLits with | Error e -> return outcome false $"compile: {e}" | Ok binary -> let out = CompilerLibrary.execute 0 binary From d97688b06875601a15975483efe74a6461128080 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 23:06:06 -0400 Subject: [PATCH 083/172] =?UTF-8?q?compiler:=20bridge=20pattern=20matching?= =?UTF-8?q?=20(EMatch)=20=E2=80=94=20enums=20become=20usable?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit EMatch -> AST.Match; MatchPattern -> AST.Pattern (literals of every int width, bool/string/char, var, wildcard `_`, tuple, list, list-cons, and enum via PConstructor with the same tuple-payload convention as construction). PT's single-pattern case with MPOr alternatives maps to the compiler's grouped MatchCase.Patterns; `when` guards -> Guard. MPFloat and nested MPOr still hard-fail. Reference collectors recurse through match arms so callees/types in branches are pulled into the closure. Proven: `classify (a) = let s = Shape.Circle a in match s with Circle r -> r | Square r -> 0` -> compiles, run(42)=42 == interp. Enums are now construct + match end to end. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 89 ++++++++++++++++++- 1 file changed, 88 insertions(+), 1 deletion(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 1c11637016..a6a3cbfa63 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -145,6 +145,52 @@ let private tuplePayload (xs : List) : AST.Expr option = | [ x ] -> Some x | many -> Some(AST.TupleLiteral many) +/// Multi-field enum patterns become a single tuple sub-pattern (mirrors the +/// tuple-payload convention used when constructing enums). +let private tuplePatPayload (ps : List) : AST.Pattern option = + match ps with + | [] -> None + | [ p ] -> Some p + | many -> Some(AST.PTuple many) + +let rec bridgePattern (p : PT.MatchPattern) : Result = + let r = bridgePattern + match p with + | PT.MPUnit _ -> Ok AST.PUnit + | PT.MPBool(_, b) -> Ok(AST.PBool b) + | PT.MPInt64(_, n) -> Ok(AST.PInt64 n) + | PT.MPInt(_, big) -> + if big >= bigint System.Int64.MinValue && big <= bigint System.Int64.MaxValue then + Ok(AST.PInt64(int64 big)) + else + err "pattern" "Int outside Int64 range" + | PT.MPInt8(_, n) -> Ok(AST.PInt8Literal n) + | PT.MPInt16(_, n) -> Ok(AST.PInt16Literal n) + | PT.MPInt32(_, n) -> Ok(AST.PInt32Literal n) + | PT.MPInt128(_, n) -> Ok(AST.PInt128Literal n) + | PT.MPUInt8(_, n) -> Ok(AST.PUInt8Literal n) + | PT.MPUInt16(_, n) -> Ok(AST.PUInt16Literal n) + | PT.MPUInt32(_, n) -> Ok(AST.PUInt32Literal n) + | PT.MPUInt64(_, n) -> Ok(AST.PUInt64Literal n) + | PT.MPUInt128(_, n) -> Ok(AST.PUInt128Literal n) + | PT.MPString(_, s) -> Ok(AST.PString s) + | PT.MPChar(_, c) -> Ok(AST.PChar c) + | PT.MPVariable(_, "_") -> Ok AST.PWildcard + | PT.MPVariable(_, name) -> Ok(AST.PVar name) + | PT.MPTuple(_, a, b, rest) -> + (a :: b :: rest) |> List.map r |> allOk |> Result.map AST.PTuple + | PT.MPList(_, pats) -> pats |> List.map r |> allOk |> Result.map AST.PList + | PT.MPListCons(_, head, tail) -> + r head + |> Result.bind (fun h -> r tail |> Result.map (fun t -> AST.PListCons([ h ], t))) + | PT.MPEnum(_, caseName, fieldPats) -> + fieldPats + |> List.map r + |> allOk + |> Result.map (fun ps -> AST.PConstructor(caseName, tuplePatPayload ps)) + | PT.MPFloat _ -> err "pattern" "MPFloat" + | PT.MPOr _ -> err "pattern" "nested MPOr" + let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result = let recurse = bridgeExpr paramNames match e with @@ -221,12 +267,43 @@ let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result Result.map (fun bridged -> AST.Call(nameFor h, AST.NonEmptyList.fromList bridged)) | PT.EApply(_, _, _, _) -> err "expr" "EApply of a non-fn-name (higher-order)" - | PT.EMatch(_, _, _) -> err "expr" "EMatch" + | PT.EMatch(_, arg, cases) -> + recurse arg + |> Result.bind (fun scrut -> + cases + |> List.map (bridgeCase paramNames) + |> allOk + |> Result.map (fun cs -> AST.Match(scrut, cs))) | PT.EList(_, _) -> err "expr" "EList" | PT.ETuple(_, _, _, _) -> err "expr" "ETuple" | PT.EPipe(_, _, _) -> err "expr" "EPipe" | _ -> err "expr" (e.GetType().Name) +/// Lower one match case. A PT case has a single pattern (alternatives live in +/// MPOr); the compiler groups alternatives in MatchCase.Patterns. +and bridgeCase + (paramNames : string[]) + (c : PT.MatchCase) + : Result = + let patterns = + match c.pat with + | PT.MPOr(_, alts) -> alts |> NEList.toList |> List.map bridgePattern |> allOk + | p -> bridgePattern p |> Result.map (fun x -> [ x ]) + patterns + |> Result.bind (fun pats -> + let guard = + match c.whenCondition with + | None -> Ok None + | Some g -> bridgeExpr paramNames g |> Result.map Some + guard + |> Result.bind (fun gd -> + bridgeExpr paramNames c.rhs + |> Result.map (fun body -> + ({ Patterns = AST.NonEmptyList.fromList pats + Guard = gd + Body = body } + : AST.MatchCase)))) + // --------------------------------------------------------------------------- // Type definitions // --------------------------------------------------------------------------- @@ -316,6 +393,11 @@ let rec referencedPackageFns (e : PT.Expr) : List = | PT.ERecord(_, _, _, fields) -> fields |> List.collect (snd >> r) | PT.ERecordFieldAccess(_, record, _) -> r record | PT.EEnum(_, _, _, _, fields) -> fields |> List.collect r + | PT.EMatch(_, arg, cases) -> + r arg + @ (cases + |> List.collect (fun c -> + r c.rhs @ (match c.whenCondition with Some g -> r g | None -> []))) | PT.EApply(_, PT.EFnName(_, nr), _, args) -> let here = match nr.resolved with @@ -350,6 +432,11 @@ let rec typeRefsInExpr (e : PT.Expr) : List = | PT.EIf(_, c, t, Some el) -> r c @ r t @ r el | PT.EIf(_, c, t, None) -> r c @ r t | PT.ELet(_, _, v, body) -> r v @ r body + | PT.EMatch(_, arg, cases) -> + r arg + @ (cases + |> List.collect (fun c -> + r c.rhs @ (match c.whenCondition with Some g -> r g | None -> []))) | PT.EApply(_, f, _, args) -> r f @ (args |> NEList.toList |> List.collect r) | _ -> [] From 39e12ba59087f9c03a5e354e2107f6f716df191f Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 23:09:44 -0400 Subject: [PATCH 084/172] compiler: zero-value synthesis for record/enum params (accurate coverage) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit compileFnCheck makes a fn reachable by calling it with zero-valued args, but zeroLit only handled primitives — so a fn taking a record/enum param reported a bogus "no zero literal" instead of being checked. zeroValue builds a zero value from the bridged type defs (record -> all-zero fields; enum -> first variant with zero payload; tuple -> zeros), guarding recursive types. Effect on the full-tree sweep: COMPILED 86 -> 178 / 3900 (4.6%). The jump is real fns that always bridged fine (they build/inspect records+enums, e.g. Table.createColumn, Rendering.colorize, Cli.Apps.Model.isDaemon) but couldn't be made reachable before. Progression: 43 (leaf) -> 71 (records/enums) -> 86 (match) -> 178 (reachability). Remaining walls: TCustomType 1304 (generic — Option/Result), TList 923, TUuid 385, generics 213. --- .../Builtins.Compiler/Libs/Compiler.fs | 47 ++++++++++++++++++- 1 file changed, 46 insertions(+), 1 deletion(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 9f8150c07b..130995cc5f 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -184,6 +184,41 @@ let rec private zeroLit (t : AST.Type) : Result = | AST.TUnit -> Ok AST.UnitLiteral | other -> Error $"no zero literal for {other}" +/// A zero value for any bridged type — including records/enums, built from the +/// bridged type defs — so compileFnCheck can make a fn taking custom-type params +/// reachable. `seen` guards against infinite recursion on recursive types. +let rec private zeroValue + (defs : Map) + (seen : Set) + (t : AST.Type) + : Result = + match t with + | AST.TRecord(name, _) -> + if Set.contains name seen then Error $"recursive type {name}" + else + match Map.tryFind name defs with + | Some(AST.RecordDef(_, _, fields)) -> + fields + |> List.map (fun (fname, ft) -> + zeroValue defs (Set.add name seen) ft |> Result.map (fun v -> (fname, v))) + |> allOk + |> Result.map (fun fs -> AST.RecordLiteral(name, fs)) + | _ -> Error $"no record def {name}" + | AST.TSum(name, _) -> + if Set.contains name seen then Error $"recursive type {name}" + else + match Map.tryFind name defs with + | Some(AST.SumTypeDef(_, _, variant :: _)) -> + match variant.Payload with + | None -> Ok(AST.Constructor(name, variant.Name, None)) + | Some pt -> + zeroValue defs (Set.add name seen) pt + |> Result.map (fun pv -> AST.Constructor(name, variant.Name, Some pv)) + | _ -> Error $"no sum def {name}" + | AST.TTuple ts -> + ts |> List.map (zeroValue defs seen) |> allOk |> Result.map AST.TupleLiteral + | prim -> zeroLit prim + /// Compile-check one package fn by hash (bridge its call-graph, make it /// reachable with zero-valued args, compile — don't run). Returns (ok, detail). /// Wrapped so an unexpected crash in one fn can't abort a batch sweep. @@ -197,8 +232,18 @@ let private checkOne (hash : string) : Ply = match fds |> List.tryFind (fun fd -> fd.Name = rootName) with | None -> return (false, "root fn not bridged") | Some rootFd -> + let defsByName = + typeDefs + |> List.choose (fun td -> + match td with + | AST.RecordDef(n, _, _) -> Some(n, td) + | AST.SumTypeDef(n, _, _) -> Some(n, td) + | AST.TypeAlias(n, _, _) -> Some(n, td)) + |> Map.ofList let dummy = - rootFd.Params |> AST.NonEmptyList.toList |> List.map (snd >> zeroLit) + rootFd.Params + |> AST.NonEmptyList.toList + |> List.map (snd >> zeroValue defsByName Set.empty) match List.tryPick (function Error e -> Some e | Ok _ -> None) dummy with | Some e -> return (false, $"arg-synthesis: {e}") | None -> From bb50ad8c0421773ebc346970aeb41da93c189291 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 23:16:40 -0400 Subject: [PATCH 085/172] =?UTF-8?q?compiler:=20generics=20via=20monomorphi?= =?UTF-8?q?zation=20=E2=80=94=20the=20glue-layer=20gate?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit De-risked with a probe first: the compiler monomorphizes an injected generic AST (identity<'a>(x)=x @ Int64 -> 42). So the bridge now carries generics through instead of hard-failing: - TVariable -> TVar; fn/type defs keep their TypeParams; a call site with type args lowers to AST.TypeApp (compiler monomorphizes) instead of AST.Call; generic record/enum types are included in the type env. - A generic ROOT fn is given a monomorphic entry point: mainCall instantiates its type params at Int64 via TypeApp, and rootParamTypes substitutes TVar->Int64 so zero args can be synthesized. Proven: `gid (x: 'a): 'a = x`, compileFnByHash [99] -> (true, "99"). Full-tree sweep: COMPILED 178 -> 250 / 3900 (6.4%). TCustomType collapsed 1304 -> 405 (Option/Result/generic records bridge now); the wall is now TList 1342 (generics exposed the list-using bodies), then TUuid 423, TFn 176, EString-interp 124, TDict 95, EPipe 86, ERecordUpdate 85. Progression: 43(leaf)->71(records/enums)->86(match)->178(reachability)->250(generics). --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 165 +++++++++--------- .../Builtins.Compiler/Libs/Compiler.fs | 62 +++++-- 2 files changed, 124 insertions(+), 103 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index a6a3cbfa63..151f1a7ed4 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -98,12 +98,12 @@ let rec bridgeType |> Result.map (fun args -> if sum then AST.TSum(nameForType h, args) else AST.TRecord(nameForType h, args))) + | PT.TVariable v -> Ok(AST.TVar v) | PT.TList _ -> err "type" "TList" | PT.TTuple _ -> err "type" "TTuple" | PT.TDict _ -> err "type" "TDict" | PT.TFn _ -> err "type" "TFn" | PT.TDB _ -> err "type" "TDB" - | PT.TVariable v -> err "type" $"TVariable {v}" | PT.TUuid -> err "type" "TUuid" | PT.TDateTime -> err "type" "TDateTime" | other -> err "type" (other.GetType().Name) @@ -224,48 +224,46 @@ let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result Result.bind (fun v -> recurse body |> Result.map (fun b -> AST.Let(name, v, b))) | PT.ELet(_, _, _, _) -> err "let" "non-variable let pattern" - // Records - | PT.ERecord(_, nr, typeArgs, fields) -> - if not (List.isEmpty typeArgs) then - err "generics" "type args on record literal" - else - typeHash nr - |> Result.bind (fun h -> - fields - |> List.map (fun (fname, fexpr) -> recurse fexpr |> Result.map (fun be -> (fname, be))) - |> allOk - |> Result.map (fun fs -> AST.RecordLiteral(nameForType h, fs))) + // Records (type args, if any, are inferred by the compiler's monomorphizer) + | PT.ERecord(_, nr, _, fields) -> + typeHash nr + |> Result.bind (fun h -> + fields + |> List.map (fun (fname, fexpr) -> recurse fexpr |> Result.map (fun be -> (fname, be))) + |> allOk + |> Result.map (fun fs -> AST.RecordLiteral(nameForType h, fs))) | PT.ERecordFieldAccess(_, record, fieldName) -> recurse record |> Result.map (fun r -> AST.RecordAccess(r, fieldName)) // Enum construction - | PT.EEnum(_, nr, typeArgs, caseName, fields) -> - if not (List.isEmpty typeArgs) then - err "generics" "type args on enum construction" - else - typeHash nr - |> Result.bind (fun h -> - fields - |> List.map recurse - |> allOk - |> Result.map (fun fs -> AST.Constructor(nameForType h, caseName, tuplePayload fs))) - // Cross-fn calls: a direct call to a package fn lowers to AST.Call; the - // callee itself is bridged separately (the builtin walks the call graph). + | PT.EEnum(_, nr, _, caseName, fields) -> + typeHash nr + |> Result.bind (fun h -> + fields + |> List.map recurse + |> allOk + |> Result.map (fun fs -> AST.Constructor(nameForType h, caseName, tuplePayload fs))) + // Cross-fn calls: a direct call to a package fn lowers to AST.Call, or + // AST.TypeApp when the call site carries type args (the compiler monomorphizes + // it). The callee itself is bridged separately (the builtin walks the graph). | PT.EApply(_, PT.EFnName(_, nr), typeArgs, args) -> - if not (List.isEmpty typeArgs) then - err "generics" "type args at call site" - else - match nr.resolved with - | Error _ -> err "call" "unresolved fn name" - | Ok resolved -> - match resolved.name with - | PT.FQFnName.Builtin b -> err "builtin" $"{b.name}_v{b.version}" - | PT.FQFnName.Package(PT.Hash h) -> - args - |> NEList.toList - |> List.map recurse - |> allOk - |> Result.map (fun bridged -> - AST.Call(nameFor h, AST.NonEmptyList.fromList bridged)) + match nr.resolved with + | Error _ -> err "call" "unresolved fn name" + | Ok resolved -> + match resolved.name with + | PT.FQFnName.Builtin b -> err "builtin" $"{b.name}_v{b.version}" + | PT.FQFnName.Package(PT.Hash h) -> + let bridgedArgs = args |> NEList.toList |> List.map recurse |> allOk + let bridgedTypeArgs = typeArgs |> List.map (bridgeType Map.empty) + // NB: type args reference only TVar/prims here; a custom type in a type + // arg would need the type env (rare) — falls through as an error then. + match allOk bridgedTypeArgs, bridgedArgs with + | Error e, _ -> Error e + | _, Error e -> Error e + | Ok tas, Ok bas -> + if List.isEmpty tas then + Ok(AST.Call(nameFor h, AST.NonEmptyList.fromList bas)) + else + Ok(AST.TypeApp(nameFor h, tas, AST.NonEmptyList.fromList bas)) | PT.EApply(_, _, _, _) -> err "expr" "EApply of a non-fn-name (higher-order)" | PT.EMatch(_, arg, cases) -> recurse arg @@ -316,34 +314,32 @@ let bridgeTypeDef (pt : PT.PackageType.PackageType) : Result = let d = pt.declaration - if not (List.isEmpty d.typeParams) then - err "generics" "generic type definition" - else - match d.definition with - | PT.TypeDeclaration.Alias _ -> err "type" "type alias" - | PT.TypeDeclaration.Record fields -> - fields - |> NEList.toList - |> List.map (fun (f : PT.TypeDeclaration.RecordField) -> - bridgeType isSum f.typ |> Result.map (fun t -> (f.name, t))) - |> allOk - |> Result.map (fun fs -> AST.RecordDef(name, [], fs)) - | PT.TypeDeclaration.Enum cases -> - cases - |> NEList.toList - |> List.map (fun (c : PT.TypeDeclaration.EnumCase) -> - c.fields - |> List.map (fun (ef : PT.TypeDeclaration.EnumField) -> bridgeType isSum ef.typ) - |> allOk - |> Result.map (fun fieldTypes -> - let payload = - match fieldTypes with - | [] -> None - | [ t ] -> Some t - | ts -> Some(AST.TTuple ts) - ({ Name = c.name; Payload = payload } : AST.Variant))) + let tps = d.typeParams + match d.definition with + | PT.TypeDeclaration.Alias _ -> err "type" "type alias" + | PT.TypeDeclaration.Record fields -> + fields + |> NEList.toList + |> List.map (fun (f : PT.TypeDeclaration.RecordField) -> + bridgeType isSum f.typ |> Result.map (fun t -> (f.name, t))) + |> allOk + |> Result.map (fun fs -> AST.RecordDef(name, tps, fs)) + | PT.TypeDeclaration.Enum cases -> + cases + |> NEList.toList + |> List.map (fun (c : PT.TypeDeclaration.EnumCase) -> + c.fields + |> List.map (fun (ef : PT.TypeDeclaration.EnumField) -> bridgeType isSum ef.typ) |> allOk - |> Result.map (fun variants -> AST.SumTypeDef(name, [], variants)) + |> Result.map (fun fieldTypes -> + let payload = + match fieldTypes with + | [] -> None + | [ t ] -> Some t + | ts -> Some(AST.TTuple ts) + ({ Name = c.name; Payload = payload } : AST.Variant))) + |> allOk + |> Result.map (fun variants -> AST.SumTypeDef(name, tps, variants)) // --------------------------------------------------------------------------- // Functions @@ -357,26 +353,23 @@ let bridgeFn (compiledName : string) (fn : PT.PackageFn.PackageFn) : Result = - if not (List.isEmpty fn.typeParams) then - err "generics" $"function has type params: {fn.typeParams}" - else - let paramList = NEList.toList fn.parameters - let paramNames = paramList |> List.map (fun p -> p.name) |> Array.ofList - let bridgedParams = - paramList - |> List.map (fun p -> bridgeType isSum p.typ |> Result.map (fun t -> (p.name, t))) - |> allOk - bridgedParams - |> Result.bind (fun ps -> - bridgeType isSum fn.returnType - |> Result.bind (fun retType -> - bridgeExpr paramNames fn.body - |> Result.map (fun body -> - ({ Name = compiledName - TypeParams = [] - Params = AST.NonEmptyList.fromList ps - ReturnType = retType - Body = body } : AST.FunctionDef)))) + let paramList = NEList.toList fn.parameters + let paramNames = paramList |> List.map (fun p -> p.name) |> Array.ofList + let bridgedParams = + paramList + |> List.map (fun p -> bridgeType isSum p.typ |> Result.map (fun t -> (p.name, t))) + |> allOk + bridgedParams + |> Result.bind (fun ps -> + bridgeType isSum fn.returnType + |> Result.bind (fun retType -> + bridgeExpr paramNames fn.body + |> Result.map (fun body -> + ({ Name = compiledName + TypeParams = fn.typeParams + Params = AST.NonEmptyList.fromList ps + ReturnType = retType + Body = body } : AST.FunctionDef)))) // --------------------------------------------------------------------------- // Reference collectors (for the transitive fetch closures in the builtin) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 130995cc5f..eed94d8137 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -127,13 +127,10 @@ let private buildPieces let isSum = types |> List.choose (fun (h, pt) -> - if List.isEmpty pt.declaration.typeParams then - match pt.declaration.definition with - | PT.TypeDeclaration.Record _ -> Some(h, false) - | PT.TypeDeclaration.Enum _ -> Some(h, true) - | PT.TypeDeclaration.Alias _ -> None - else - None) + match pt.declaration.definition with + | PT.TypeDeclaration.Record _ -> Some(h, false) + | PT.TypeDeclaration.Enum _ -> Some(h, true) + | PT.TypeDeclaration.Alias _ -> None) |> Map.ofList let typeDefs = types @@ -148,19 +145,49 @@ let private buildPieces | Ok tds, Ok fds -> return Ok(tds, fds, Bridge.nameFor rootHash) } -/// Build the program (type defs + all bridged fns + a call to the root) and -/// compile it. +/// Substitute type variables (used to instantiate a generic root fn's type +/// params to a concrete type so it has a monomorphic entry point). +let rec private substTVars (m : Map) (t : AST.Type) : AST.Type = + let s = substTVars m + match t with + | AST.TVar v -> Map.tryFind v m |> Option.defaultValue t + | AST.TRecord(n, args) -> AST.TRecord(n, List.map s args) + | AST.TSum(n, args) -> AST.TSum(n, List.map s args) + | AST.TList inner -> AST.TList(s inner) + | AST.TTuple ts -> AST.TTuple(List.map s ts) + | AST.TDict(k, v) -> AST.TDict(s k, s v) + | AST.TFunction(args, ret) -> AST.TFunction(List.map s args, s ret) + | other -> other + +/// The entry call to the root fn. A generic root is instantiated at Int64 (so +/// it monomorphizes to a concrete entry point) via TypeApp. +let private mainCall (rootFd : AST.FunctionDef) (args : List) : AST.Expr = + let nParams = List.length rootFd.TypeParams + if nParams = 0 then + AST.Call(rootFd.Name, AST.NonEmptyList.fromList args) + else + AST.TypeApp( + rootFd.Name, + List.replicate nParams AST.TInt64, + AST.NonEmptyList.fromList args) + +/// Concrete param types of the root, with its generic params instantiated at +/// Int64 (matching mainCall) — so zero args can be synthesized. +let private rootParamTypes (rootFd : AST.FunctionDef) : List = + let subst = rootFd.TypeParams |> List.map (fun tp -> (tp, AST.TInt64)) |> Map.ofList + rootFd.Params |> AST.NonEmptyList.toList |> List.map (snd >> substTVars subst) + +/// Build the program (type defs + all bridged fns + the entry call) and compile. let private compileClosure (typeDefs : List) (fds : List) - (rootName : string) - (args : List) + (mainExpr : AST.Expr) : Result = let program : AST.Program = AST.Program( (typeDefs |> List.map AST.TypeDef) @ (fds |> List.map AST.FunctionDef) - @ [ AST.Expression(AST.Call(rootName, AST.NonEmptyList.fromList args)) ]) + @ [ AST.Expression mainExpr ]) compileAst program /// A zero/default literal for a compiler type, so a function can be made @@ -241,14 +268,12 @@ let private checkOne (hash : string) : Ply = | AST.TypeAlias(n, _, _) -> Some(n, td)) |> Map.ofList let dummy = - rootFd.Params - |> AST.NonEmptyList.toList - |> List.map (snd >> zeroValue defsByName Set.empty) + rootParamTypes rootFd |> List.map (zeroValue defsByName Set.empty) match List.tryPick (function Error e -> Some e | Ok _ -> None) dummy with | Some e -> return (false, $"arg-synthesis: {e}") | None -> let args = dummy |> List.choose (function Ok x -> Some x | Error _ -> None) - match compileClosure typeDefs fds rootName args with + match compileClosure typeDefs fds (mainCall rootFd args) with | Ok binary -> return (true, $"{binary.Length} bytes") | Error e -> return (false, e) with e -> @@ -392,7 +417,10 @@ let fns () : List = match pieces with | Error e -> return outcome false e | Ok(typeDefs, fds, rootName) -> - match compileClosure typeDefs fds rootName argLits with + match fds |> List.tryFind (fun fd -> fd.Name = rootName) with + | None -> return outcome false "root fn not bridged" + | Some rootFd -> + match compileClosure typeDefs fds (mainCall rootFd argLits) with | Error e -> return outcome false $"compile: {e}" | Ok binary -> let out = CompilerLibrary.execute 0 binary From 841e929275cd01a46a9a79df22f78a2857c0c3e3 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 23:19:14 -0400 Subject: [PATCH 086/172] compiler: bridge lists (TList / EList) TList -> AST.TList, EList -> AST.ListLiteral, empty-list zero value; reference collectors recurse list elements. (List patterns MPList/MPListCons already bridged with match.) The compiler's lists are finger-trees, so this is native. Full-tree sweep: COMPILED 250 -> 328 / 3900 (8.4%). Walls now: TCustomType 600 (lists exposed deeper custom-type use), TTuple 597, TUuid 460, TFn 240 (higher- order), EPipe 186, ERecordUpdate 171, EString-interp 147. Progression: 43->71->86->178->250->328. --- backend/src/Builtins/Builtins.Compiler/Bridge.fs | 6 ++++-- backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs | 1 + 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 151f1a7ed4..13bfee355c 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -99,7 +99,7 @@ let rec bridgeType if sum then AST.TSum(nameForType h, args) else AST.TRecord(nameForType h, args))) | PT.TVariable v -> Ok(AST.TVar v) - | PT.TList _ -> err "type" "TList" + | PT.TList inner -> recurse inner |> Result.map AST.TList | PT.TTuple _ -> err "type" "TTuple" | PT.TDict _ -> err "type" "TDict" | PT.TFn _ -> err "type" "TFn" @@ -272,7 +272,7 @@ let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result List.map (bridgeCase paramNames) |> allOk |> Result.map (fun cs -> AST.Match(scrut, cs))) - | PT.EList(_, _) -> err "expr" "EList" + | PT.EList(_, elems) -> elems |> List.map recurse |> allOk |> Result.map AST.ListLiteral | PT.ETuple(_, _, _, _) -> err "expr" "ETuple" | PT.EPipe(_, _, _) -> err "expr" "EPipe" | _ -> err "expr" (e.GetType().Name) @@ -400,6 +400,7 @@ let rec referencedPackageFns (e : PT.Expr) : List = | PT.FQFnName.Builtin _ -> [] | Error _ -> [] here @ (args |> NEList.toList |> List.collect r) + | PT.EList(_, elems) -> elems |> List.collect r | PT.EApply(_, f, _, args) -> r f @ (args |> NEList.toList |> List.collect r) | _ -> [] @@ -430,6 +431,7 @@ let rec typeRefsInExpr (e : PT.Expr) : List = @ (cases |> List.collect (fun c -> r c.rhs @ (match c.whenCondition with Some g -> r g | None -> []))) + | PT.EList(_, elems) -> elems |> List.collect r | PT.EApply(_, f, _, args) -> r f @ (args |> NEList.toList |> List.collect r) | _ -> [] diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index eed94d8137..cd3b014d5d 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -244,6 +244,7 @@ let rec private zeroValue | _ -> Error $"no sum def {name}" | AST.TTuple ts -> ts |> List.map (zeroValue defs seen) |> allOk |> Result.map AST.TupleLiteral + | AST.TList _ -> Ok(AST.ListLiteral []) | prim -> zeroLit prim /// Compile-check one package fn by hash (bridge its call-graph, make it From 90ed50b71e496d4814d5e2f6d07b48a991bfc795 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 23:22:24 -0400 Subject: [PATCH 087/172] compiler: bridge tuples (TTuple/ETuple) + tuple-destructuring lets MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit TTuple -> AST.TTuple, ETuple -> AST.TupleLiteral. bindPattern desugars tuple-destructuring lets `let (a, b) = e` to a temp binding + per-element TupleAccess lets (temp name reused safely across nesting — each RHS reads the outer temp before the inner shadows). Covers LPVariable/LPWildcard/LPUnit/LPTuple. Full-tree sweep: COMPILED 328 -> 360 / 3900 (9.2%). Walls: TCustomType 911 (tuples reached deeper), TUuid 460, TFn 281, EPipe 209, ERecordUpdate 177, EString-interp 154, TDict 122. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 37 ++++++++++++++++--- 1 file changed, 32 insertions(+), 5 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 13bfee355c..e9a2e9294e 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -100,7 +100,8 @@ let rec bridgeType else AST.TRecord(nameForType h, args))) | PT.TVariable v -> Ok(AST.TVar v) | PT.TList inner -> recurse inner |> Result.map AST.TList - | PT.TTuple _ -> err "type" "TTuple" + | PT.TTuple(a, b, rest) -> + (a :: b :: rest) |> List.map recurse |> allOk |> Result.map AST.TTuple | PT.TDict _ -> err "type" "TDict" | PT.TFn _ -> err "type" "TFn" | PT.TDB _ -> err "type" "TDB" @@ -191,6 +192,30 @@ let rec bridgePattern (p : PT.MatchPattern) : Result = | PT.MPFloat _ -> err "pattern" "MPFloat" | PT.MPOr _ -> err "pattern" "nested MPOr" +/// Bind a let-pattern over an already-bridged value and body. Tuple patterns +/// desugar to a temp binding plus per-element tuple-access lets. The temp name +/// is reused across nesting levels safely: each RHS is evaluated (reading the +/// outer temp) before the inner temp shadows it. +let rec private bindPattern + (pat : PT.LetPattern) + (value : AST.Expr) + (body : AST.Expr) + : Result = + match pat with + | PT.LPVariable(_, name) -> Ok(AST.Let(name, value, body)) + | PT.LPWildcard _ -> Ok(AST.Let("__dark_wild", value, body)) + | PT.LPUnit _ -> Ok(AST.Let("__dark_unit", value, body)) + | PT.LPTuple(_, first, second, rest) -> + let tmp = "__dark_tuple_tmp" + let subs = first :: second :: rest + let rec build (i : int) (ps : List) : Result = + match ps with + | [] -> Ok body + | p :: more -> + build (i + 1) more + |> Result.bind (fun inner -> bindPattern p (AST.TupleAccess(AST.Var tmp, i)) inner) + build 0 subs |> Result.map (fun inner -> AST.Let(tmp, value, inner)) + let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result = let recurse = bridgeExpr paramNames match e with @@ -220,10 +245,9 @@ let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result Result.bind (fun t -> recurse elseE |> Result.map (fun el -> AST.If(c, t, el)))) | PT.EIf(_, _, _, None) -> err "if" "if without else" - | PT.ELet(_, PT.LPVariable(_, name), value, body) -> + | PT.ELet(_, pat, value, body) -> recurse value - |> Result.bind (fun v -> recurse body |> Result.map (fun b -> AST.Let(name, v, b))) - | PT.ELet(_, _, _, _) -> err "let" "non-variable let pattern" + |> Result.bind (fun v -> recurse body |> Result.bind (fun b -> bindPattern pat v b)) // Records (type args, if any, are inferred by the compiler's monomorphizer) | PT.ERecord(_, nr, _, fields) -> typeHash nr @@ -273,7 +297,8 @@ let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result allOk |> Result.map (fun cs -> AST.Match(scrut, cs))) | PT.EList(_, elems) -> elems |> List.map recurse |> allOk |> Result.map AST.ListLiteral - | PT.ETuple(_, _, _, _) -> err "expr" "ETuple" + | PT.ETuple(_, a, b, rest) -> + (a :: b :: rest) |> List.map recurse |> allOk |> Result.map AST.TupleLiteral | PT.EPipe(_, _, _) -> err "expr" "EPipe" | _ -> err "expr" (e.GetType().Name) @@ -401,6 +426,7 @@ let rec referencedPackageFns (e : PT.Expr) : List = | Error _ -> [] here @ (args |> NEList.toList |> List.collect r) | PT.EList(_, elems) -> elems |> List.collect r + | PT.ETuple(_, a, b, rest) -> (a :: b :: rest) |> List.collect r | PT.EApply(_, f, _, args) -> r f @ (args |> NEList.toList |> List.collect r) | _ -> [] @@ -432,6 +458,7 @@ let rec typeRefsInExpr (e : PT.Expr) : List = |> List.collect (fun c -> r c.rhs @ (match c.whenCondition with Some g -> r g | None -> []))) | PT.EList(_, elems) -> elems |> List.collect r + | PT.ETuple(_, a, b, rest) -> (a :: b :: rest) |> List.collect r | PT.EApply(_, f, _, args) -> r f @ (args |> NEList.toList |> List.collect r) | _ -> [] From 174002d305a181e70a0a73ee59f0d4c7a352329a Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 23:24:54 -0400 Subject: [PATCH 088/172] compiler: bridge record-update + string interpolation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Two direct mappings: ERecordUpdate -> AST.RecordUpdate, and EString with interpolation/multi-segment -> AST.InterpolatedString (StringText/StringExpr parts). Reference collectors recurse both so callees/types inside them are fetched. Full-tree sweep: COMPILED 360 -> 399 / 3900 (10.2% — past 10%). Walls: TCustomType 911, TUuid 460, TFn 282 (higher-order), EPipe 243, TDict 121, EValue 110. Progression: 43->71->86->178->250->328->360->399. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 25 ++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index e9a2e9294e..3d1299cc0b 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -228,7 +228,14 @@ let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result Ok(AST.BoolLiteral b) | PT.EUnit _ -> Ok AST.UnitLiteral | PT.EString(_, [ PT.StringText s ]) -> Ok(AST.StringLiteral s) - | PT.EString(_, _) -> err "expr" "EString with interpolation/multi-segment" + | PT.EString(_, segments) -> + segments + |> List.map (fun seg -> + match seg with + | PT.StringText s -> Ok(AST.StringText s) + | PT.StringInterpolation e -> recurse e |> Result.map AST.StringExpr) + |> allOk + |> Result.map AST.InterpolatedString | PT.EChar(_, c) -> Ok(AST.CharLiteral c) | PT.EVariable(_, name) -> Ok(AST.Var name) | PT.EArg(_, i) -> @@ -258,6 +265,14 @@ let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result Result.map (fun fs -> AST.RecordLiteral(nameForType h, fs))) | PT.ERecordFieldAccess(_, record, fieldName) -> recurse record |> Result.map (fun r -> AST.RecordAccess(r, fieldName)) + | PT.ERecordUpdate(_, record, updates) -> + recurse record + |> Result.bind (fun r -> + updates + |> NEList.toList + |> List.map (fun (fname, fexpr) -> recurse fexpr |> Result.map (fun be -> (fname, be))) + |> allOk + |> Result.map (fun ups -> AST.RecordUpdate(r, ups))) // Enum construction | PT.EEnum(_, nr, _, caseName, fields) -> typeHash nr @@ -425,6 +440,10 @@ let rec referencedPackageFns (e : PT.Expr) : List = | PT.FQFnName.Builtin _ -> [] | Error _ -> [] here @ (args |> NEList.toList |> List.collect r) + | PT.EString(_, segs) -> + segs |> List.collect (fun s -> match s with PT.StringInterpolation e -> r e | PT.StringText _ -> []) + | PT.ERecordUpdate(_, record, ups) -> + r record @ (ups |> NEList.toList |> List.collect (snd >> r)) | PT.EList(_, elems) -> elems |> List.collect r | PT.ETuple(_, a, b, rest) -> (a :: b :: rest) |> List.collect r | PT.EApply(_, f, _, args) -> r f @ (args |> NEList.toList |> List.collect r) @@ -457,6 +476,10 @@ let rec typeRefsInExpr (e : PT.Expr) : List = @ (cases |> List.collect (fun c -> r c.rhs @ (match c.whenCondition with Some g -> r g | None -> []))) + | PT.EString(_, segs) -> + segs |> List.collect (fun s -> match s with PT.StringInterpolation e -> r e | PT.StringText _ -> []) + | PT.ERecordUpdate(_, record, ups) -> + r record @ (ups |> NEList.toList |> List.collect (snd >> r)) | PT.EList(_, elems) -> elems |> List.collect r | PT.ETuple(_, a, b, rest) -> (a :: b :: rest) |> List.collect r | PT.EApply(_, f, _, args) -> r f @ (args |> NEList.toList |> List.collect r) From 016d8bc35b1d58bc86c13c89aa2cab2da59576a1 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 23:31:26 -0400 Subject: [PATCH 089/172] compiler: bridge pipes (EPipe) + make type-fetch robust to non-type hashes MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit EPipe desugars stage-by-stage, the accumulated value becoming each stage's first input: fn-call -> Call/TypeApp(piped :: args), infix -> BinOp(piped, rhs), enum -> Constructor(piped :: fields), variable -> Apply(Var, piped :: args). Lambda stages still hard-fail (need lambdas). fetchTypeClosure now SKIPS a hash that doesn't resolve to a type (an over-collected fn hash, or a genuinely absent type) instead of failing the whole fn — bridgeType hard-fails cleanly later if the type was actually needed. Net full-tree still 399/3900: pipe-using fns now reach their next blocker, which is almost always ELambda (79 -> 226) or a builtin. Lambdas/closures + the builtin shims (§8) are the remaining frontier; TUuid 458, TFn 282, TDict 120, EValue 118. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 86 ++++++++++++++++++- .../Builtins.Compiler/Libs/Compiler.fs | 6 +- 2 files changed, 90 insertions(+), 2 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 3d1299cc0b..72b5a3dde1 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -314,7 +314,12 @@ let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result elems |> List.map recurse |> allOk |> Result.map AST.ListLiteral | PT.ETuple(_, a, b, rest) -> (a :: b :: rest) |> List.map recurse |> allOk |> Result.map AST.TupleLiteral - | PT.EPipe(_, _, _) -> err "expr" "EPipe" + | PT.EPipe(_, lhs, parts) -> + recurse lhs + |> Result.bind (fun start -> + (Ok start, parts) + ||> List.fold (fun accR part -> + accR |> Result.bind (fun acc -> bridgePipePart paramNames acc part))) | _ -> err "expr" (e.GetType().Name) /// Lower one match case. A PT case has a single pattern (alternatives live in @@ -342,6 +347,51 @@ and bridgeCase Body = body } : AST.MatchCase)))) +/// Desugar one pipe stage: the accumulated value `piped` becomes the stage's +/// first input. `x |> f a` -> f(x, a); `x |> (+) a` -> x + a; `x |> Some` -> +/// Some x; `x |> v a` -> v(x, a) (v is a fn value). Lambda stages need lambdas. +and bridgePipePart + (paramNames : string[]) + (piped : AST.Expr) + (part : PT.PipeExpr) + : Result = + let recurse = bridgeExpr paramNames + match part with + | PT.EPipeInfix(_, op, rhs) -> + bridgeInfix op + |> Result.bind (fun o -> recurse rhs |> Result.map (fun r -> AST.BinOp(o, piped, r))) + | PT.EPipeFnCall(_, nr, typeArgs, args) -> + match nr.resolved with + | Error _ -> err "call" "unresolved fn name (pipe)" + | Ok resolved -> + match resolved.name with + | PT.FQFnName.Builtin b -> err "builtin" $"{b.name}_v{b.version}" + | PT.FQFnName.Package(PT.Hash h) -> + let bargs = args |> List.map recurse |> allOk + let tas = typeArgs |> List.map (bridgeType Map.empty) |> allOk + match tas, bargs with + | Error e, _ -> Error e + | _, Error e -> Error e + | Ok tl, Ok bas -> + let full = piped :: bas + if List.isEmpty tl then Ok(AST.Call(nameFor h, AST.NonEmptyList.fromList full)) + else Ok(AST.TypeApp(nameFor h, tl, AST.NonEmptyList.fromList full)) + | PT.EPipeEnum(_, nr, caseName, fields) -> + typeHash nr + |> Result.bind (fun h -> + fields + |> List.map recurse + |> allOk + |> Result.map (fun fs -> + AST.Constructor(nameForType h, caseName, tuplePayload (piped :: fs)))) + | PT.EPipeVariable(_, varName, args) -> + args + |> List.map recurse + |> allOk + |> Result.map (fun bas -> + AST.Apply(AST.Var varName, AST.NonEmptyList.fromList (piped :: bas))) + | PT.EPipeLambda(_, _, _) -> err "expr" "EPipeLambda" + // --------------------------------------------------------------------------- // Type definitions // --------------------------------------------------------------------------- @@ -444,6 +494,23 @@ let rec referencedPackageFns (e : PT.Expr) : List = segs |> List.collect (fun s -> match s with PT.StringInterpolation e -> r e | PT.StringText _ -> []) | PT.ERecordUpdate(_, record, ups) -> r record @ (ups |> NEList.toList |> List.collect (snd >> r)) + | PT.EPipe(_, lhs, parts) -> + r lhs + @ (parts + |> List.collect (fun p -> + match p with + | PT.EPipeFnCall(_, nr, _, args) -> + (match nr.resolved with + | Ok res -> + match res.name with + | PT.FQFnName.Package(PT.Hash h) -> [ h ] + | PT.FQFnName.Builtin _ -> [] + | Error _ -> []) + @ (args |> List.collect r) + | PT.EPipeInfix(_, _, e) -> r e + | PT.EPipeEnum(_, _, _, fields) -> fields |> List.collect r + | PT.EPipeVariable(_, _, args) -> args |> List.collect r + | PT.EPipeLambda(_, _, body) -> r body)) | PT.EList(_, elems) -> elems |> List.collect r | PT.ETuple(_, a, b, rest) -> (a :: b :: rest) |> List.collect r | PT.EApply(_, f, _, args) -> r f @ (args |> NEList.toList |> List.collect r) @@ -480,6 +547,23 @@ let rec typeRefsInExpr (e : PT.Expr) : List = segs |> List.collect (fun s -> match s with PT.StringInterpolation e -> r e | PT.StringText _ -> []) | PT.ERecordUpdate(_, record, ups) -> r record @ (ups |> NEList.toList |> List.collect (snd >> r)) + | PT.EPipe(_, lhs, parts) -> + r lhs + @ (parts + |> List.collect (fun p -> + match p with + | PT.EPipeFnCall(_, nr, _, args) -> + (match nr.resolved with + | Ok res -> + match res.name with + | PT.FQFnName.Package(PT.Hash h) -> [ h ] + | PT.FQFnName.Builtin _ -> [] + | Error _ -> []) + @ (args |> List.collect r) + | PT.EPipeInfix(_, _, e) -> r e + | PT.EPipeEnum(_, _, _, fields) -> fields |> List.collect r + | PT.EPipeVariable(_, _, args) -> args |> List.collect r + | PT.EPipeLambda(_, _, body) -> r body)) | PT.EList(_, elems) -> elems |> List.collect r | PT.ETuple(_, a, b, rest) -> (a :: b :: rest) |> List.collect r | PT.EApply(_, f, _, args) -> r f @ (args |> NEList.toList |> List.collect r) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index cd3b014d5d..35a5781075 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -100,7 +100,11 @@ let rec private fetchTypeClosure else let! tOpt = LibDB.PackageManager.pt.getType (PT.FQTypeName.package h) match tOpt with - | None -> return Error $"missing type {h}" + // A hash that doesn't resolve to a type (e.g. an over-collected fn hash, + // or a genuinely absent type) is skipped rather than failing the whole + // fn. If it was a real type the fn needs, bridgeType hard-fails on it + // cleanly (TCustomType not in env); if it was noise, no harm. + | None -> return! fetchTypeClosure (Set.add h visited) acc rest | Some pt -> let deps = Bridge.typeRefsInTypeDef pt return! fetchTypeClosure (Set.add h visited) (acc @ [ (h, pt) ]) (rest @ deps) From d1df30ced95fb29b3492501edfc6c964b6095da0 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 23:38:50 -0400 Subject: [PATCH 090/172] compiler: lambdas, higher-order apply, function types MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Completes the higher-order story: ELambda -> AST.Lambda (untyped Dark params get a fresh TVar keyed by node id; the compiler's inference/monomorphizer resolves it from context — verified with a probe). EPipeLambda beta-reduces via bindPattern. EApply of a non-fn-name -> AST.Apply (apply a fn value/lambda). TFn -> TFunction (function-typed params). Full-tree sweep: 399 -> 410 / 3900 (10.5%). The language surface is now largely covered; the two co-dominant walls are unsupported-builtin (1008) and TCustomType (1025). Lambda-using fns now bridge past the lambda and bottom out at the BUILTIN calls inside List.map/Option.map/etc. — i.e. we've reached the §8 builtin-shim frontier, a categorically different workstream (native intrinsics, not more bridge language coverage). Remaining smaller: TUuid 460, EValue 144, TDict 128, ESelf 125. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 39 +++++++++++++++++-- 1 file changed, 36 insertions(+), 3 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 72b5a3dde1..2522b5cafc 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -103,7 +103,10 @@ let rec bridgeType | PT.TTuple(a, b, rest) -> (a :: b :: rest) |> List.map recurse |> allOk |> Result.map AST.TTuple | PT.TDict _ -> err "type" "TDict" - | PT.TFn _ -> err "type" "TFn" + | PT.TFn(args, ret) -> + (NEList.toList args |> List.map recurse |> allOk, recurse ret) + |> fun (a, r) -> + a |> Result.bind (fun args' -> r |> Result.map (fun ret' -> AST.TFunction(args', ret'))) | PT.TDB _ -> err "type" "TDB" | PT.TUuid -> err "type" "TUuid" | PT.TDateTime -> err "type" "TDateTime" @@ -303,7 +306,18 @@ let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result err "expr" "EApply of a non-fn-name (higher-order)" + // Higher-order application: apply a fn value (variable/lambda/expr) to args. + | PT.EApply(_, funcExpr, typeArgs, args) -> + if not (List.isEmpty typeArgs) then + err "generics" "type args on higher-order apply" + else + recurse funcExpr + |> Result.bind (fun f -> + args + |> NEList.toList + |> List.map recurse + |> allOk + |> Result.map (fun bas -> AST.Apply(f, AST.NonEmptyList.fromList bas))) | PT.EMatch(_, arg, cases) -> recurse arg |> Result.bind (fun scrut -> @@ -320,6 +334,19 @@ let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result List.fold (fun accR part -> accR |> Result.bind (fun acc -> bridgePipePart paramNames acc part))) + // Lambda: untyped Dark params get a fresh TVar (unique per node id) that the + // compiler's inference/monomorphizer resolves from the call context. + | PT.ELambda(lamId, pats, body) -> + pats + |> NEList.toList + |> List.map (fun p -> + match p with + | PT.LPVariable(_, name) -> Ok(name, AST.TVar $"__lam_{lamId}_{name}") + | _ -> err "lambda" "non-variable lambda param") + |> allOk + |> Result.bind (fun ps -> + recurse body + |> Result.map (fun b -> AST.Lambda(AST.NonEmptyList.fromList ps, b))) | _ -> err "expr" (e.GetType().Name) /// Lower one match case. A PT case has a single pattern (alternatives live in @@ -390,7 +417,11 @@ and bridgePipePart |> allOk |> Result.map (fun bas -> AST.Apply(AST.Var varName, AST.NonEmptyList.fromList (piped :: bas))) - | PT.EPipeLambda(_, _, _) -> err "expr" "EPipeLambda" + // `x |> fun p -> body` beta-reduces to binding p = x in body. + | PT.EPipeLambda(_, pats, body) -> + match NEList.toList pats with + | [ single ] -> recurse body |> Result.bind (fun b -> bindPattern single piped b) + | _ -> err "pipe" "multi-param pipe lambda" // --------------------------------------------------------------------------- // Type definitions @@ -513,6 +544,7 @@ let rec referencedPackageFns (e : PT.Expr) : List = | PT.EPipeLambda(_, _, body) -> r body)) | PT.EList(_, elems) -> elems |> List.collect r | PT.ETuple(_, a, b, rest) -> (a :: b :: rest) |> List.collect r + | PT.ELambda(_, _, body) -> r body | PT.EApply(_, f, _, args) -> r f @ (args |> NEList.toList |> List.collect r) | _ -> [] @@ -566,6 +598,7 @@ let rec typeRefsInExpr (e : PT.Expr) : List = | PT.EPipeLambda(_, _, body) -> r body)) | PT.EList(_, elems) -> elems |> List.collect r | PT.ETuple(_, a, b, rest) -> (a :: b :: rest) |> List.collect r + | PT.ELambda(_, _, body) -> r body | PT.EApply(_, f, _, args) -> r f @ (args |> NEList.toList |> List.collect r) | _ -> [] From 4eace841b1b8ff2c61a1649afa23e976588b7f15 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Wed, 15 Jul 2026 23:57:50 -0400 Subject: [PATCH 091/172] =?UTF-8?q?compiler:=20bridge=20type=20aliases=20(?= =?UTF-8?q?inline=20to=20target)=20=E2=80=94=20big=20custom-type=20unlock?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Upgraded the type env from record|sum to a TypeEntry (TERecord | TESum | TEAlias of AST.Type). A non-generic alias resolves to its bridged target type and inlines at every TCustomType reference (no TypeDef emitted). buildPieces resolves aliases against the record/enum env; alias-of-alias is skipped and its users hard-fail cleanly. Full-tree sweep: COMPILED 410 -> 571 / 3900 (14.6%). TCustomType collapsed 1025 -> 98 (aliases were most of it). The wall is now squarely unsupported-builtin (1135, the §8 shim workstream), then TUuid 498, ESelf 214 (recursion), EValue 200 (constants), TDict 156. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 38 ++++++++++++------- .../Builtins.Compiler/Libs/Compiler.fs | 25 +++++++++--- 2 files changed, 44 insertions(+), 19 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 2522b5cafc..3d30633c7d 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -21,6 +21,14 @@ module PT = LibExecution.ProgramTypes // AST here is the airlifted compiler's AST (top-level module in LibCompiler). +/// The type environment: what a referenced custom type is. Records/enums lower +/// to a named TRecord/TSum + a TypeDef; a (non-generic) alias inlines to its +/// already-bridged target type. +type TypeEntry = + | TERecord + | TESum + | TEAlias of AST.Type + let private err (category : string) (detail : string) : Result<'a, string> = Error $"unsupported-{category}: {detail}" @@ -62,10 +70,10 @@ let private typeHashOpt // --------------------------------------------------------------------------- let rec bridgeType - (isSum : Map) + (types : Map) (t : PT.TypeReference) : Result = - let recurse = bridgeType isSum + let recurse = bridgeType types match t with | PT.TInt64 -> Ok AST.TInt64 | PT.TInt8 -> Ok AST.TInt8 @@ -88,16 +96,20 @@ let rec bridgeType | PT.TCustomType(nr, typeArgs) -> typeHash nr |> Result.bind (fun h -> - match Map.tryFind h isSum with - // Not in the type env => generic / alias / unfetched: hard-fail cleanly. + match Map.tryFind h types with + // Not in the type env => unfetched / unsupported: hard-fail cleanly. | None -> err "type" "TCustomType" - | Some sum -> + | Some(TEAlias target) -> + if List.isEmpty typeArgs then Ok target + else err "generics" "generic type alias" + | Some entry -> typeArgs |> List.map recurse |> allOk |> Result.map (fun args -> - if sum then AST.TSum(nameForType h, args) - else AST.TRecord(nameForType h, args))) + match entry with + | TESum -> AST.TSum(nameForType h, args) + | _ -> AST.TRecord(nameForType h, args))) | PT.TVariable v -> Ok(AST.TVar v) | PT.TList inner -> recurse inner |> Result.map AST.TList | PT.TTuple(a, b, rest) -> @@ -430,7 +442,7 @@ and bridgePipePart /// Lower a package type (non-generic record/enum) to a compiler TypeDef under /// the given compiler-side name. let bridgeTypeDef - (isSum : Map) + (types : Map) (name : string) (pt : PT.PackageType.PackageType) : Result = @@ -442,7 +454,7 @@ let bridgeTypeDef fields |> NEList.toList |> List.map (fun (f : PT.TypeDeclaration.RecordField) -> - bridgeType isSum f.typ |> Result.map (fun t -> (f.name, t))) + bridgeType types f.typ |> Result.map (fun t -> (f.name, t))) |> allOk |> Result.map (fun fs -> AST.RecordDef(name, tps, fs)) | PT.TypeDeclaration.Enum cases -> @@ -450,7 +462,7 @@ let bridgeTypeDef |> NEList.toList |> List.map (fun (c : PT.TypeDeclaration.EnumCase) -> c.fields - |> List.map (fun (ef : PT.TypeDeclaration.EnumField) -> bridgeType isSum ef.typ) + |> List.map (fun (ef : PT.TypeDeclaration.EnumField) -> bridgeType types ef.typ) |> allOk |> Result.map (fun fieldTypes -> let payload = @@ -470,7 +482,7 @@ let bridgeTypeDef /// compiler-side name. Params keep their Dark names (positional EArg refs and /// any by-name refs both resolve). Generics are not yet supported. let bridgeFn - (isSum : Map) + (types : Map) (compiledName : string) (fn : PT.PackageFn.PackageFn) : Result = @@ -478,11 +490,11 @@ let bridgeFn let paramNames = paramList |> List.map (fun p -> p.name) |> Array.ofList let bridgedParams = paramList - |> List.map (fun p -> bridgeType isSum p.typ |> Result.map (fun t -> (p.name, t))) + |> List.map (fun p -> bridgeType types p.typ |> Result.map (fun t -> (p.name, t))) |> allOk bridgedParams |> Result.bind (fun ps -> - bridgeType isSum fn.returnType + bridgeType types fn.returnType |> Result.bind (fun retType -> bridgeExpr paramNames fn.body |> Result.map (fun body -> diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 35a5781075..2f70581f6b 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -128,21 +128,34 @@ let private buildPieces | Ok types -> // The type env: non-generic record (false) / enum (true) types only. // Generic + alias types are omitted, so any fn using one hard-fails. - let isSum = + // Records/enums emit a TypeDef and lower to a named TRecord/TSum. + let baseEnv = types |> List.choose (fun (h, pt) -> match pt.declaration.definition with - | PT.TypeDeclaration.Record _ -> Some(h, false) - | PT.TypeDeclaration.Enum _ -> Some(h, true) + | PT.TypeDeclaration.Record _ -> Some(h, Bridge.TERecord) + | PT.TypeDeclaration.Enum _ -> Some(h, Bridge.TESum) | PT.TypeDeclaration.Alias _ -> None) |> Map.ofList + // Non-generic aliases inline to their (bridged) target. Resolved against + // baseEnv, so an alias of a record/enum works; alias-of-alias is skipped + // (its users then hard-fail cleanly on TCustomType). + let typeEnv = + (baseEnv, types) + ||> List.fold (fun env (h, pt) -> + match pt.declaration.definition with + | PT.TypeDeclaration.Alias t when List.isEmpty pt.declaration.typeParams -> + match Bridge.bridgeType baseEnv t with + | Ok bt -> Map.add h (Bridge.TEAlias bt) env + | Error _ -> env + | _ -> env) let typeDefs = types - |> List.filter (fun (h, _) -> Map.containsKey h isSum) - |> List.map (fun (h, pt) -> Bridge.bridgeTypeDef isSum (Bridge.nameForType h) pt) + |> List.filter (fun (h, _) -> Map.containsKey h baseEnv) + |> List.map (fun (h, pt) -> Bridge.bridgeTypeDef typeEnv (Bridge.nameForType h) pt) |> allOk let fnDefs = - fns |> List.map (fun (h, fn) -> Bridge.bridgeFn isSum (Bridge.nameFor h) fn) |> allOk + fns |> List.map (fun (h, fn) -> Bridge.bridgeFn typeEnv (Bridge.nameFor h) fn) |> allOk match typeDefs, fnDefs with | Error e, _ -> return Error e | _, Error e -> return Error e From f188884dab2a24e6c3b31616997c2a43a2165178 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 00:26:10 -0400 Subject: [PATCH 092/172] compiler: route pure builtins to the compiler's native stdlib (seam row 1) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The first entry of the builtin dispatch table (see BUILTINS-ARCHITECTURE.md): a call to a pure main-repo builtin (String/List/Int64/Bool/Option/Result) lowers to a Call to the compiler's OWN native stdlib fn, which implements the same Darklang semantics on ~12 intrinsics. Curated + conservative (not a blind name-converter); the type checker rejects any signature mismatch, and I differential-tested the routing: int64ToString/stringToUppercase/stringJoin compiled-via-stdlib == interpreter (n=42, AB42, x-42-y). This is NOT the general builtin solution — effectful builtins still hard-fail and await the runtime seam (daemon). It's row 1 of that seam's migration table, buildable and verifiable now. Full-tree sweep: COMPILED 571 -> 662 / 3900 (17.0%). unsupported-builtin 1008 -> 818 (effectful + unmapped-pure remain). Progression: 43 -> ... -> 571 (aliases) -> 662 (pure-builtin routing). --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 97 ++++++++++++++++++- 1 file changed, 95 insertions(+), 2 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 3d30633c7d..3388e53d68 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -46,6 +46,82 @@ let private allOk (results : List>) : Result, string let nameFor (hash : string) : string = "fn_" + hash let nameForType (hash : string) : string = "T_" + hash +/// Pure-tier builtin migration (row 1 of the seam's dispatch table, see +/// notes/compiler-merge/BUILTINS-ARCHITECTURE.md): a call to one of these +/// main-repo builtins lowers to a call to the compiler's OWN native stdlib fn, +/// which implements the same Darklang semantics on ~12 intrinsics. Curated and +/// conservative — the type checker rejects any signature mismatch (safe), and +/// each entry must be differential-tested (compiled vs interpreter) before it's +/// trusted for execution. Effectful builtins are NOT here — those await the +/// runtime seam (daemon). Keyed by the main-repo builtin's bare name. +let builtinToStdlib : Map = + Map + [ // String + "stringLength", "Stdlib.String.length" + "stringIsEmpty", "Stdlib.String.isEmpty" + "stringContains", "Stdlib.String.contains" + "stringJoin", "Stdlib.String.join" + "stringSplit", "Stdlib.String.split" + "stringSlice", "Stdlib.String.slice" + "stringTrim", "Stdlib.String.trim" + "stringTrimStart", "Stdlib.String.trimStart" + "stringTrimEnd", "Stdlib.String.trimEnd" + "stringReverse", "Stdlib.String.reverse" + "stringToLowercase", "Stdlib.String.toLowerCase" + "stringToUppercase", "Stdlib.String.toUpperCase" + "stringStartsWith", "Stdlib.String.startsWith" + "stringEndsWith", "Stdlib.String.endsWith" + "stringPrepend", "Stdlib.String.prepend" + "stringIndexOf", "Stdlib.String.indexOf" + "stringPadStart", "Stdlib.String.padStart" + "stringPadEnd", "Stdlib.String.padEnd" + "stringRepeat", "Stdlib.String.repeat" + // List + "listLength", "Stdlib.List.length" + "listAppend", "Stdlib.List.append" + "listReverse", "Stdlib.List.reverse" + "listMap", "Stdlib.List.map" + "listFilter", "Stdlib.List.filter" + "listFold", "Stdlib.List.fold" + "listFlatten", "Stdlib.List.flatten" + "listIsEmpty", "Stdlib.List.isEmpty" + "listTake", "Stdlib.List.take" + "listDrop", "Stdlib.List.drop" + "listPush", "Stdlib.List.push" + "listPushBack", "Stdlib.List.pushBack" + "listSingleton", "Stdlib.List.singleton" + "listGetAt", "Stdlib.List.getAt" + "listMember", "Stdlib.List.member" + // Bool + "boolNot", "Stdlib.Bool.not" + "boolAnd", "Stdlib.Bool.and" + "boolOr", "Stdlib.Bool.or" + "boolXor", "Stdlib.Bool.xor" + // Int (lowered to Int64, matching TInt->TInt64) + "intToString", "Stdlib.Int64.toString" + "int64ToString", "Stdlib.Int64.toString" + "intGreaterThan", "Stdlib.Int64.greaterThan" + "int64GreaterThan", "Stdlib.Int64.greaterThan" + "intGreaterThanOrEqualTo", "Stdlib.Int64.greaterThanOrEqualTo" + "intLessThan", "Stdlib.Int64.lessThan" + "int64LessThan", "Stdlib.Int64.lessThan" + "intDivide", "Stdlib.Int64.div" + "int64Divide", "Stdlib.Int64.div" + "intMax", "Stdlib.Int64.max" + "intMin", "Stdlib.Int64.min" + "intAbsoluteValue", "Stdlib.Int64.absoluteValue" + // Option / Result + "optionMap", "Stdlib.Option.map" + "optionWithDefault", "Stdlib.Option.withDefault" + "optionAndThen", "Stdlib.Option.andThen" + "optionIsSome", "Stdlib.Option.isSome" + "optionIsNone", "Stdlib.Option.isNone" + "resultMap", "Stdlib.Result.map" + "resultWithDefault", "Stdlib.Result.withDefault" + "resultAndThen", "Stdlib.Result.andThen" + "resultIsOk", "Stdlib.Result.isOk" + "resultIsError", "Stdlib.Result.isError" ] + /// The package-type hash a type-name resolution points at. let private typeHash (nr : PT.NameResolution) @@ -304,7 +380,16 @@ let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result err "call" "unresolved fn name" | Ok resolved -> match resolved.name with - | PT.FQFnName.Builtin b -> err "builtin" $"{b.name}_v{b.version}" + | PT.FQFnName.Builtin b -> + // Pure builtins route to the compiler's native stdlib (dispatch row 1). + match Map.tryFind b.name builtinToStdlib with + | Some stdlibFn -> + args + |> NEList.toList + |> List.map recurse + |> allOk + |> Result.map (fun bas -> AST.Call(stdlibFn, AST.NonEmptyList.fromList bas)) + | None -> err "builtin" $"{b.name}_v{b.version}" | PT.FQFnName.Package(PT.Hash h) -> let bridgedArgs = args |> NEList.toList |> List.map recurse |> allOk let bridgedTypeArgs = typeArgs |> List.map (bridgeType Map.empty) @@ -404,7 +489,15 @@ and bridgePipePart | Error _ -> err "call" "unresolved fn name (pipe)" | Ok resolved -> match resolved.name with - | PT.FQFnName.Builtin b -> err "builtin" $"{b.name}_v{b.version}" + | PT.FQFnName.Builtin b -> + match Map.tryFind b.name builtinToStdlib with + | Some stdlibFn -> + args + |> List.map recurse + |> allOk + |> Result.map (fun bas -> + AST.Call(stdlibFn, AST.NonEmptyList.fromList (piped :: bas))) + | None -> err "builtin" $"{b.name}_v{b.version}" | PT.FQFnName.Package(PT.Hash h) -> let bargs = args |> List.map recurse |> allOk let tas = typeArgs |> List.map (bridgeType Map.empty) |> allOk From 71fc01d7abaab16adaa77d9ee17772ec177b83da Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 00:31:27 -0400 Subject: [PATCH 093/172] compiler: bridge ESelf recursion (+ thread a BridgeCtx) Threaded a BridgeCtx { Params; Self; Values } through expression bridging. EApply(ESelf, args) -> Call(ctx.Self, args) (self-recursion by compiled name). EValue is wired to inline a package constant from ctx.Values (value closure lands next; empty for now, so it hard-fails cleanly as "unsupported-value"). bridgeFn takes a values map and builds the ctx. Full-tree sweep: 662 -> 684 / 3900 (17.5%). Modest because self-recursive fns usually also hit builtins/generics; ESelf as a blocker is gone. Remaining: unsupported-builtin 858, TUuid 498, arg-synth 444, EValue 186, non-var-lambda 161, TDict 157, generic-typeargs ~166. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 51 +++++++++++++++---- .../Builtins.Compiler/Libs/Compiler.fs | 4 +- 2 files changed, 42 insertions(+), 13 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 3388e53d68..ee61618e63 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -29,6 +29,14 @@ type TypeEntry = | TESum | TEAlias of AST.Type +/// Threaded through expression bridging. `Params` maps EArg indices to the +/// enclosing fn's compiler-side param names; `Self` is the current fn's compiled +/// name (for ESelf recursion); `Values` inlines referenced package constants. +type BridgeCtx = + { Params : string[] + Self : string + Values : Map } + let private err (category : string) (detail : string) : Result<'a, string> = Error $"unsupported-{category}: {detail}" @@ -307,8 +315,8 @@ let rec private bindPattern |> Result.bind (fun inner -> bindPattern p (AST.TupleAccess(AST.Var tmp, i)) inner) build 0 subs |> Result.map (fun inner -> AST.Let(tmp, value, inner)) -let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result = - let recurse = bridgeExpr paramNames +let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = + let recurse = bridgeExpr ctx match e with | PT.EInt64(_, n) -> Ok(AST.Int64Literal n) | PT.EInt(_, big) -> @@ -330,7 +338,7 @@ let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result Ok(AST.CharLiteral c) | PT.EVariable(_, name) -> Ok(AST.Var name) | PT.EArg(_, i) -> - if i >= 0 && i < paramNames.Length then Ok(AST.Var paramNames[i]) + if i >= 0 && i < ctx.Params.Length then Ok(AST.Var ctx.Params[i]) else err "arg" $"EArg index {i} out of range" | PT.EInfix(_, op, l, r) -> bridgeInfix op @@ -403,6 +411,25 @@ let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result + args + |> NEList.toList + |> List.map recurse + |> allOk + |> Result.map (fun bas -> AST.Call(ctx.Self, AST.NonEmptyList.fromList bas)) + // A referenced package constant is inlined (its bridged body, from ctx.Values). + | PT.EValue(_, nr) -> + match nr.resolved with + | Error _ -> err "value" "unresolved value name" + | Ok resolved -> + match resolved.name with + | PT.FQValueName.Builtin b -> err "value-builtin" b.name + | PT.FQValueName.Package(PT.Hash h) -> + match Map.tryFind h ctx.Values with + | Some e -> Ok e + | None -> err "value" "package value not resolved" + | PT.ESelf _ -> err "expr" "bare ESelf (self as a value)" // Higher-order application: apply a fn value (variable/lambda/expr) to args. | PT.EApply(_, funcExpr, typeArgs, args) -> if not (List.isEmpty typeArgs) then @@ -419,7 +446,7 @@ let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result Result.bind (fun scrut -> cases - |> List.map (bridgeCase paramNames) + |> List.map (bridgeCase ctx) |> allOk |> Result.map (fun cs -> AST.Match(scrut, cs))) | PT.EList(_, elems) -> elems |> List.map recurse |> allOk |> Result.map AST.ListLiteral @@ -430,7 +457,7 @@ let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result Result.bind (fun start -> (Ok start, parts) ||> List.fold (fun accR part -> - accR |> Result.bind (fun acc -> bridgePipePart paramNames acc part))) + accR |> Result.bind (fun acc -> bridgePipePart ctx acc part))) // Lambda: untyped Dark params get a fresh TVar (unique per node id) that the // compiler's inference/monomorphizer resolves from the call context. | PT.ELambda(lamId, pats, body) -> @@ -449,7 +476,7 @@ let rec bridgeExpr (paramNames : string[]) (e : PT.Expr) : Result = let patterns = @@ -461,10 +488,10 @@ and bridgeCase let guard = match c.whenCondition with | None -> Ok None - | Some g -> bridgeExpr paramNames g |> Result.map Some + | Some g -> bridgeExpr ctx g |> Result.map Some guard |> Result.bind (fun gd -> - bridgeExpr paramNames c.rhs + bridgeExpr ctx c.rhs |> Result.map (fun body -> ({ Patterns = AST.NonEmptyList.fromList pats Guard = gd @@ -475,11 +502,11 @@ and bridgeCase /// first input. `x |> f a` -> f(x, a); `x |> (+) a` -> x + a; `x |> Some` -> /// Some x; `x |> v a` -> v(x, a) (v is a fn value). Lambda stages need lambdas. and bridgePipePart - (paramNames : string[]) + (ctx : BridgeCtx) (piped : AST.Expr) (part : PT.PipeExpr) : Result = - let recurse = bridgeExpr paramNames + let recurse = bridgeExpr ctx match part with | PT.EPipeInfix(_, op, rhs) -> bridgeInfix op @@ -576,11 +603,13 @@ let bridgeTypeDef /// any by-name refs both resolve). Generics are not yet supported. let bridgeFn (types : Map) + (values : Map) (compiledName : string) (fn : PT.PackageFn.PackageFn) : Result = let paramList = NEList.toList fn.parameters let paramNames = paramList |> List.map (fun p -> p.name) |> Array.ofList + let ctx = { Params = paramNames; Self = compiledName; Values = values } let bridgedParams = paramList |> List.map (fun p -> bridgeType types p.typ |> Result.map (fun t -> (p.name, t))) @@ -589,7 +618,7 @@ let bridgeFn |> Result.bind (fun ps -> bridgeType types fn.returnType |> Result.bind (fun retType -> - bridgeExpr paramNames fn.body + bridgeExpr ctx fn.body |> Result.map (fun body -> ({ Name = compiledName TypeParams = fn.typeParams diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 2f70581f6b..80ebc08943 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -155,7 +155,7 @@ let private buildPieces |> List.map (fun (h, pt) -> Bridge.bridgeTypeDef typeEnv (Bridge.nameForType h) pt) |> allOk let fnDefs = - fns |> List.map (fun (h, fn) -> Bridge.bridgeFn typeEnv (Bridge.nameFor h) fn) |> allOk + fns |> List.map (fun (h, fn) -> Bridge.bridgeFn typeEnv Map.empty (Bridge.nameFor h) fn) |> allOk match typeDefs, fnDefs with | Error e, _ -> return Error e | _, Error e -> return Error e @@ -386,7 +386,7 @@ let fns () : List = [ { name = "b"; typ = PT.TInt64; description = "" } ] returnType = PT.TInt64 description = "" } - match Bridge.bridgeFn Map.empty "bridgedFn" ptFn with + match Bridge.bridgeFn Map.empty Map.empty "bridgedFn" ptFn with | Error e -> outcome false $"bridge: {e}" |> Ply | Ok fd -> let program : AST.Program = From b45153d115d18d993cb95b4c1e74a0e5680ea8ed Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 00:35:48 -0400 Subject: [PATCH 094/172] =?UTF-8?q?compiler:=20bridge=20EValue=20=E2=80=94?= =?UTF-8?q?=20inline=20package=20constants=20(value=20closure)?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit buildPieces now fetches the transitive package-value closure (valueRefsInExpr + LibDB.PackageManager.pt.getValue), bridges each constant's body (no params/self, accumulating so a value can reference an earlier one), and threads the resulting map through BridgeCtx.Values. EValue -> the inlined bridged constant. Full-tree sweep: 684 -> 729 / 3900 (18.7%). EValue blocker 186 -> 40 (the rest reference fns or unsupported nodes in their bodies). Progression: ... 662 (pure builtins) -> 684 (ESelf) -> 729 (EValue). Remaining: unsupported-builtin 892, TUuid 498, arg-synth 461, non-var-lambda 171, TDict 162, generic-typeargs ~187. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 30 +++++++++++++ .../Builtins.Compiler/Libs/Compiler.fs | 45 ++++++++++++++++++- 2 files changed, 73 insertions(+), 2 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index ee61618e63..8fc6e97f98 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -752,3 +752,33 @@ let typeRefsInTypeDef (pt : PT.PackageType.PackageType) : List = cases |> NEList.toList |> List.collect (fun c -> c.fields |> List.collect (fun ef -> typeRefsInType ef.typ)) + +/// The package-value hashes an expression references (for the value closure). +let rec valueRefsInExpr (e : PT.Expr) : List = + let r = valueRefsInExpr + match e with + | PT.EValue(_, nr) -> + match nr.resolved with + | Ok resolved -> + match resolved.name with + | PT.FQValueName.Package(PT.Hash h) -> [ h ] + | PT.FQValueName.Builtin _ -> [] + | Error _ -> [] + | PT.EInfix(_, _, l, rhs) -> r l @ r rhs + | PT.EIf(_, c, t, Some el) -> r c @ r t @ r el + | PT.EIf(_, c, t, None) -> r c @ r t + | PT.ELet(_, _, v, body) -> r v @ r body + | PT.EList(_, elems) -> elems |> List.collect r + | PT.ETuple(_, a, b, rest) -> (a :: b :: rest) |> List.collect r + | PT.ERecord(_, _, _, fields) -> fields |> List.collect (snd >> r) + | PT.ERecordFieldAccess(_, record, _) -> r record + | PT.ERecordUpdate(_, record, ups) -> + r record @ (ups |> NEList.toList |> List.collect (snd >> r)) + | PT.EEnum(_, _, _, _, fields) -> fields |> List.collect r + | PT.EMatch(_, arg, cases) -> + r arg @ (cases |> List.collect (fun c -> r c.rhs)) + | PT.EString(_, segs) -> + segs |> List.collect (fun s -> match s with PT.StringInterpolation e -> r e | PT.StringText _ -> []) + | PT.ELambda(_, _, body) -> r body + | PT.EApply(_, f, _, args) -> r f @ (args |> NEList.toList |> List.collect r) + | _ -> [] diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 80ebc08943..77a4266341 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -110,6 +110,27 @@ let rec private fetchTypeClosure return! fetchTypeClosure (Set.add h visited) (acc @ [ (h, pt) ]) (rest @ deps) } +/// Fetch the transitive closure of package constants referenced by the seeds. +let rec private fetchValueClosure + (visited : Set) + (acc : List) + (worklist : List) + : Ply, string>> = + uply { + match worklist with + | [] -> return Ok acc + | h :: rest -> + if Set.contains h visited then + return! fetchValueClosure visited acc rest + else + let! vOpt = LibDB.PackageManager.pt.getValue (PT.FQValueName.package h) + match vOpt with + | None -> return! fetchValueClosure (Set.add h visited) acc rest + | Some pv -> + let deps = Bridge.valueRefsInExpr pv.body + return! fetchValueClosure (Set.add h visited) (acc @ [ (h, pv) ]) (rest @ deps) + } + /// Fetch + bridge the whole graph (fns and their non-generic custom types), /// returning the compiler TypeDefs, FunctionDefs, and the root's compiled name. let private buildPieces @@ -120,8 +141,17 @@ let private buildPieces match fnClosure with | Error e -> return Error e | Ok fns -> + let valueSeeds = + fns |> List.collect (fun (_, fn) -> Bridge.valueRefsInExpr fn.body) |> List.distinct + let! valueClosure = fetchValueClosure Set.empty [] valueSeeds + let values = + match valueClosure with + | Ok vs -> vs + | Error _ -> [] let typeSeeds = - fns |> List.collect (fun (_, fn) -> Bridge.typeRefsInFn fn) |> List.distinct + ((fns |> List.collect (fun (_, fn) -> Bridge.typeRefsInFn fn)) + @ (values |> List.collect (fun (_, pv) -> Bridge.typeRefsInExpr pv.body))) + |> List.distinct let! typeClosure = fetchTypeClosure Set.empty [] typeSeeds match typeClosure with | Error e -> return Error e @@ -154,8 +184,19 @@ let private buildPieces |> List.filter (fun (h, _) -> Map.containsKey h baseEnv) |> List.map (fun (h, pt) -> Bridge.bridgeTypeDef typeEnv (Bridge.nameForType h) pt) |> allOk + // Bridge each package constant's body (no params/self) into an inline + // expression, accumulating so a value can reference an earlier one. + let valuesMap = + (Map.empty, values) + ||> List.fold (fun m (h, pv) -> + let ctx : Bridge.BridgeCtx = { Params = [||]; Self = ""; Values = m } + match Bridge.bridgeExpr ctx pv.body with + | Ok e -> Map.add h e m + | Error _ -> m) let fnDefs = - fns |> List.map (fun (h, fn) -> Bridge.bridgeFn typeEnv Map.empty (Bridge.nameFor h) fn) |> allOk + fns + |> List.map (fun (h, fn) -> Bridge.bridgeFn typeEnv valuesMap (Bridge.nameFor h) fn) + |> allOk match typeDefs, fnDefs with | Error e, _ -> return Error e | _, Error e -> return Error e From 852cda6da1560f3ea1bcc9dc37e64d460daf642b Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 00:39:02 -0400 Subject: [PATCH 095/172] compiler: bridge EStatement + non-variable lambda params MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit EStatement (`first; next`) desugars to a throwaway let. Non-variable lambda params (`fun (a, b) -> …`) bind a fresh name and destructure the body via bindPattern. Both added to the reference collectors. Full-tree sweep: 729 -> 730 / 3900 (18.7%) — net +1 because those fns now bridge past the statement/lambda and hit the builtin wall (unsupported-builtin 1006). This marks the plateau: the LANGUAGE surface is essentially complete. Remaining walls are all non-language: builtins (need the runtime seam/daemon), generic call-site type args (needs inference/compiler work, ~258), and host types (TUuid 499, TDict 166, TBlob/TStream 338, TDateTime 48). --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 39 +++++++++++++------ 1 file changed, 28 insertions(+), 11 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 8fc6e97f98..a1aa21ca95 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -459,18 +459,32 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = ||> List.fold (fun accR part -> accR |> Result.bind (fun acc -> bridgePipePart ctx acc part))) // Lambda: untyped Dark params get a fresh TVar (unique per node id) that the - // compiler's inference/monomorphizer resolves from the call context. + // compiler's inference/monomorphizer resolves from the call context. A + // non-variable param (e.g. `fun (a, b) -> …`) binds a fresh name and the body + // destructures it via bindPattern. | PT.ELambda(lamId, pats, body) -> - pats - |> NEList.toList - |> List.map (fun p -> - match p with - | PT.LPVariable(_, name) -> Ok(name, AST.TVar $"__lam_{lamId}_{name}") - | _ -> err "lambda" "non-variable lambda param") - |> allOk - |> Result.bind (fun ps -> - recurse body - |> Result.map (fun b -> AST.Lambda(AST.NonEmptyList.fromList ps, b))) + let named = + pats + |> NEList.toList + |> List.mapi (fun i p -> + match p with + | PT.LPVariable(_, name) -> (name, None) + | _ -> ($"__lamarg_{lamId}_{i}", Some p)) + let compilerParams = + named |> List.map (fun (nm, _) -> (nm, AST.TVar $"__lamt_{lamId}_{nm}")) + recurse body + |> Result.bind (fun b -> + // wrap the body with a destructuring bind for each non-variable param + (Ok b, named) + ||> List.fold (fun accR (nm, patOpt) -> + match patOpt with + | None -> accR + | Some pat -> accR |> Result.bind (fun acc -> bindPattern pat (AST.Var nm) acc)) + |> Result.map (fun wb -> AST.Lambda(AST.NonEmptyList.fromList compilerParams, wb))) + | PT.EStatement(_, first, next) -> + // `first; next` — evaluate first, discard, then next. + recurse first + |> Result.bind (fun f -> recurse next |> Result.map (fun n -> AST.Let("__dark_stmt", f, n))) | _ -> err "expr" (e.GetType().Name) /// Lower one match case. A PT case has a single pattern (alternatives live in @@ -679,6 +693,7 @@ let rec referencedPackageFns (e : PT.Expr) : List = | PT.EList(_, elems) -> elems |> List.collect r | PT.ETuple(_, a, b, rest) -> (a :: b :: rest) |> List.collect r | PT.ELambda(_, _, body) -> r body + | PT.EStatement(_, first, next) -> r first @ r next | PT.EApply(_, f, _, args) -> r f @ (args |> NEList.toList |> List.collect r) | _ -> [] @@ -733,6 +748,7 @@ let rec typeRefsInExpr (e : PT.Expr) : List = | PT.EList(_, elems) -> elems |> List.collect r | PT.ETuple(_, a, b, rest) -> (a :: b :: rest) |> List.collect r | PT.ELambda(_, _, body) -> r body + | PT.EStatement(_, first, next) -> r first @ r next | PT.EApply(_, f, _, args) -> r f @ (args |> NEList.toList |> List.collect r) | _ -> [] @@ -780,5 +796,6 @@ let rec valueRefsInExpr (e : PT.Expr) : List = | PT.EString(_, segs) -> segs |> List.collect (fun s -> match s with PT.StringInterpolation e -> r e | PT.StringText _ -> []) | PT.ELambda(_, _, body) -> r body + | PT.EStatement(_, first, next) -> r first @ r next | PT.EApply(_, f, _, args) -> r f @ (args |> NEList.toList |> List.collect r) | _ -> [] From 40e3be71c830c967c127c62faea60597e8049e87 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 01:20:50 -0400 Subject: [PATCH 096/172] =?UTF-8?q?compiler:=20runtime=20seam=20LIVE=20?= =?UTF-8?q?=E2=80=94=20compiled=20code=20invokes=20real=20builtins=20via?= =?UTF-8?q?=20an=20F#=20daemon?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Phase A first light. A compiled native binary now calls back into the live runtime and gets the result of a REAL builtin: - `Stdlib.hostRpc(request)` (new compiler-stdlib fn, Rpc.dark): writes the request to a FIFO the host reads, polls a response file the host writes (the proven zero-codegen channel). - `Builtins.Compiler`: `dispatchBuiltin` parses `name\narg…`, looks the builtin up in `exeState.fns.builtIn`, marshals scalar args per the builtin's declared param types, invokes `fn.fn (exeState, vm, [], args)`, marshals the result. Dval<->wire scalar marshalling (all int widths incl. DarkInt, String/Bool/Float/Char/Unit). `serveOneRequest` runs the daemon as an in-process Task around `execute`. - `Builtin.compilerDaemonSelfTest` proves it: compiled `hostRpc("stringLength\n hello")` -> daemon invokes the real stringLength builtin -> binary stdout = 5. So ANY builtin in the runtime is now callable from compiled code (scalars today; containers + bridge integration next). Channel is single-call for now (multi-call needs a read-until-EOF intrinsic / socket — Phase F). All gated; default build untouched. --- .../Builtins.Compiler/Libs/Compiler.fs | 111 ++++++++++++++++++ backend/src/LibCompiler/CompilerLibrary.fs | 1 + backend/src/LibCompiler/stdlib/Rpc.dark | 17 +++ 3 files changed, 129 insertions(+) create mode 100644 backend/src/LibCompiler/stdlib/Rpc.dark diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 77a4266341..edfc435380 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -343,6 +343,85 @@ let private checkOne (hash : string) : Ply = let private outcome (ok : bool) (detail : string) : Dval = DTuple(DBool ok, DString detail, []) +// --------------------------------------------------------------------------- +// Runtime seam: an in-process F# daemon that services builtin-call requests +// from compiled native code and dispatches them to the REAL builtins in the +// live ExecutionState. Channel = the FIFO/file prototype (Stdlib.hostRpc). +// v1 marshals scalars only; container types are TODO. (BUILTINS-ARCHITECTURE.md) +// --------------------------------------------------------------------------- + +/// Scalar Dval -> wire string. +let private dvalToWire (d : Dval) : string = + match d with + | DString s -> s + | DInt n -> string (DarkInt.toBigInt n) + | DInt8 n -> string n + | DInt16 n -> string n + | DInt32 n -> string n + | DInt64 n -> string n + | DInt128 n -> string n + | DUInt8 n -> string n + | DUInt16 n -> string n + | DUInt32 n -> string n + | DUInt64 n -> string n + | DUInt128 n -> string n + | DBool b -> if b then "true" else "false" + | DUnit -> "unit" + | DFloat f -> string f + | DChar c -> c + | other -> $"?unmarshalable:{other.GetType().Name}" + +/// wire string -> scalar Dval, per the builtin param's declared type. +let private wireToDval (t : TypeReference) (s : string) : Dval = + match t with + | TString -> DString s + | TInt64 -> DInt64(int64 s) + | TBool -> DBool(s = "true") + | TUnit -> DUnit + | TFloat -> DFloat(float s) + | TChar -> DChar s + | _ -> DString s + +/// Dispatch one request ("name\narg1\narg2…") to the real builtin, return the +/// wire response. +let private dispatchBuiltin + (exeState : ExecutionState) + (vm : VMState) + (request : string) + : Ply = + uply { + let parts = request.Split('\n') + let name = parts[0] + let wireArgs = parts[1..] |> Array.toList + match Map.tryFind (FQFnName.builtin name 0) exeState.fns.builtIn with + | None -> return $"ERR:no-builtin:{name}" + | Some bfn -> + let n = min bfn.parameters.Length wireArgs.Length + let dvalArgs = + List.map2 + (fun (p : BuiltInParam) (a : string) -> wireToDval p.typ a) + (List.truncate n bfn.parameters) + (List.truncate n wireArgs) + let! result = bfn.fn (exeState, vm, [], dvalArgs) + return dvalToWire result + } + +/// Set up the channel and service ONE builtin request in a background task +/// (single-call v1; multi-call needs a read-until-EOF intrinsic / socket). +let private serveOneRequest (exeState : ExecutionState) (vm : VMState) : System.Threading.Tasks.Task = + let reqFifo = "/tmp/dark-rpc-req" + let respFile = "/tmp/dark-rpc-resp" + for f in [ respFile; reqFifo ] do + if System.IO.File.Exists f then System.IO.File.Delete f + let psi = System.Diagnostics.ProcessStartInfo("mkfifo", reqFifo) + psi.UseShellExecute <- false + (System.Diagnostics.Process.Start psi).WaitForExit() + System.Threading.Tasks.Task.Run(fun () -> + let req = System.IO.File.ReadAllText reqFifo + let resp = (dispatchBuiltin exeState vm req |> Ply.toTask).Result + System.IO.File.WriteAllText(respFile + ".tmp", resp) + System.IO.File.Move(respFile + ".tmp", respFile, true)) + let fns () : List = [ { name = fn "compilerInfo" 0 typeParams = [] @@ -402,6 +481,38 @@ let fns () : List = capabilities = LibExecution.Capabilities.noCaps deprecated = NotDeprecated } + { name = fn "compilerDaemonSelfTest" 0 + typeParams = [] + parameters = [ Param.make "unit" TUnit "" ] + returnType = TString + description = + "Proves the runtime seam dispatches to a REAL builtin: compiles a program calling Stdlib.hostRpc(\"stringLength\\nhello\"); an in-process F# daemon reads the request, invokes the real stringLength builtin (DString hello -> DInt64 5), writes the response; the native binary reads it back. Returns the binary's stdout (expect 5)." + fn = + (function + | exeState, vm, _, [ DUnit ] -> + uply { + let daemon = serveOneRequest exeState vm + let program : AST.Program = + AST.Program + [ AST.Expression( + AST.Call( + "Stdlib.hostRpc", + AST.NonEmptyList.singleton (AST.StringLiteral "stringLength\nhello"))) ] + match compileAst program with + | Error e -> + daemon.Wait() + return DString $"compile-error: {e}" + | Ok binary -> + let out = CompilerLibrary.execute 0 binary + daemon.Wait() + return DString $"binary stdout={out.Stdout.Trim()} (expected 5)" + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + { name = fn "compilerBridgeSelfTest" 0 typeParams = [] parameters = [ Param.make "unit" TUnit "" ] diff --git a/backend/src/LibCompiler/CompilerLibrary.fs b/backend/src/LibCompiler/CompilerLibrary.fs index 0aebcb7a7c..81c6bf2900 100644 --- a/backend/src/LibCompiler/CompilerLibrary.fs +++ b/backend/src/LibCompiler/CompilerLibrary.fs @@ -1034,6 +1034,7 @@ let private loadStdlib () : Result = "stdlib/Crypto.dark" "stdlib/Math.dark" "stdlib/__FingerTree.dark" + "stdlib/Rpc.dark" ] let mergeFile (acc: AST.TopLevel list) (filename: string) : Result = match loadDarkFileAllowInternal filename with diff --git a/backend/src/LibCompiler/stdlib/Rpc.dark b/backend/src/LibCompiler/stdlib/Rpc.dark new file mode 100644 index 0000000000..c6ddcbdc52 --- /dev/null +++ b/backend/src/LibCompiler/stdlib/Rpc.dark @@ -0,0 +1,17 @@ +// Rpc.dark - the compiler-merge runtime seam's compiled-side RPC stub (internal). +// +// A compiled program calls Stdlib.hostRpc(request) to invoke a host builtin: it +// writes the request to a well-known path (a FIFO the host reads), then polls a +// response file the host writes. This is the FIFO/file prototype channel proven +// in notes/compiler-merge/BUILTINS-ARCHITECTURE.md §4.5; it will be replaced by a +// blocking socket/pipe intrinsic (§Phase F) once it's the bottleneck. + +def Stdlib.hostRpcPoll(u: Unit) : String = + if Stdlib.File.exists("/tmp/dark-rpc-resp") then + Stdlib.Result.withDefault(Stdlib.File.readText("/tmp/dark-rpc-resp"), "") + else + Stdlib.hostRpcPoll(()) + +def Stdlib.hostRpc(request: String) : String = + let _ = Stdlib.File.writeText("/tmp/dark-rpc-req", request) in + Stdlib.hostRpcPoll(()) From 804a5141829c39afcce3a69ae9359bf368dad08a Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 01:26:36 -0400 Subject: [PATCH 097/172] compiler: bridge routes effectful builtins through the host RPC seam MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit An effectful builtin call now lowers to Stdlib.hostRpc("name\narg…") when the builtin is wire-marshalable (v1: all args String, returns Unit or String) — the routable set is computed from the LIVE runtime (buildEffectfulMap over exeState.fns.builtIn) and threaded through BridgeCtx.Effectful. Unit-returning calls discard the response; String-returning ones return it. Full-tree sweep: 730 -> 755 / 3900 (19.4%). Modest because only the String/Unit effectful subset marshals so far; the ~963 remaining need Int/Bool/List/etc. arg + return marshalling (Phase A3) and the daemon wired into the run path (next). --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 36 ++++++++++++++-- .../Builtins.Compiler/Libs/Compiler.fs | 42 ++++++++++++++----- 2 files changed, 64 insertions(+), 14 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index a1aa21ca95..1b5e3b6f07 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -35,7 +35,11 @@ type TypeEntry = type BridgeCtx = { Params : string[] Self : string - Values : Map } + Values : Map + /// Effectful builtins routable through the host RPC seam: name -> returns-a- + /// String (true) vs returns Unit (false). Presence implies all args are + /// String (only those are wire-marshalable in v1). Built from the live runtime. + Effectful : Map } let private err (category : string) (detail : string) : Result<'a, string> = Error $"unsupported-{category}: {detail}" @@ -397,7 +401,28 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = |> List.map recurse |> allOk |> Result.map (fun bas -> AST.Call(stdlibFn, AST.NonEmptyList.fromList bas)) - | None -> err "builtin" $"{b.name}_v{b.version}" + | None -> + // Effectful builtins route through the host RPC seam (Stdlib.hostRpc): + // request = "name\narg0\narg1…" (all args String), result per the + // builtin's return type. + match Map.tryFind b.name ctx.Effectful with + | Some retIsString -> + args + |> NEList.toList + |> List.map recurse + |> allOk + |> Result.map (fun bas -> + let request = + (AST.StringLiteral b.name, bas) + ||> List.fold (fun acc arg -> + AST.BinOp( + AST.StringConcat, + AST.BinOp(AST.StringConcat, acc, AST.StringLiteral "\n"), + arg)) + let call = AST.Call("Stdlib.hostRpc", AST.NonEmptyList.singleton request) + if retIsString then call + else AST.Let("__rpc_ignore", call, AST.UnitLiteral)) + | None -> err "builtin" $"{b.name}_v{b.version}" | PT.FQFnName.Package(PT.Hash h) -> let bridgedArgs = args |> NEList.toList |> List.map recurse |> allOk let bridgedTypeArgs = typeArgs |> List.map (bridgeType Map.empty) @@ -618,12 +643,17 @@ let bridgeTypeDef let bridgeFn (types : Map) (values : Map) + (effectful : Map) (compiledName : string) (fn : PT.PackageFn.PackageFn) : Result = let paramList = NEList.toList fn.parameters let paramNames = paramList |> List.map (fun p -> p.name) |> Array.ofList - let ctx = { Params = paramNames; Self = compiledName; Values = values } + let ctx = + { Params = paramNames + Self = compiledName + Values = values + Effectful = effectful } let bridgedParams = paramList |> List.map (fun p -> bridgeType types p.typ |> Result.map (fun t -> (p.name, t))) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index edfc435380..9da6822bc3 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -133,7 +133,25 @@ let rec private fetchValueClosure /// Fetch + bridge the whole graph (fns and their non-generic custom types), /// returning the compiler TypeDefs, FunctionDefs, and the root's compiled name. +/// Effectful builtins routable through the host RPC seam, from the live runtime: +/// name -> returns-String (true) / returns-Unit (false); included only when all +/// params are String (the wire-marshalable subset in v1). +let private buildEffectfulMap (exeState : ExecutionState) : Map = + exeState.fns.builtIn + |> Map.toList + |> List.choose (fun (name, bfn) -> + let allStringArgs = bfn.parameters |> List.forall (fun p -> p.typ = TString) + if not allStringArgs then + None + else + match bfn.returnType with + | TUnit -> Some(name.name, false) + | TString -> Some(name.name, true) + | _ -> None) + |> Map.ofList + let private buildPieces + (effectful : Map) (rootHash : string) : Ply * List * string, string>> = uply { @@ -189,13 +207,13 @@ let private buildPieces let valuesMap = (Map.empty, values) ||> List.fold (fun m (h, pv) -> - let ctx : Bridge.BridgeCtx = { Params = [||]; Self = ""; Values = m } + let ctx : Bridge.BridgeCtx = { Params = [||]; Self = ""; Values = m; Effectful = Map.empty } match Bridge.bridgeExpr ctx pv.body with | Ok e -> Map.add h e m | Error _ -> m) let fnDefs = fns - |> List.map (fun (h, fn) -> Bridge.bridgeFn typeEnv valuesMap (Bridge.nameFor h) fn) + |> List.map (fun (h, fn) -> Bridge.bridgeFn typeEnv valuesMap effectful (Bridge.nameFor h) fn) |> allOk match typeDefs, fnDefs with | Error e, _ -> return Error e @@ -308,10 +326,10 @@ let rec private zeroValue /// Compile-check one package fn by hash (bridge its call-graph, make it /// reachable with zero-valued args, compile — don't run). Returns (ok, detail). /// Wrapped so an unexpected crash in one fn can't abort a batch sweep. -let private checkOne (hash : string) : Ply = +let private checkOne (effectful : Map) (hash : string) : Ply = uply { try - let! pieces = buildPieces hash + let! pieces = buildPieces effectful hash match pieces with | Error e -> return (false, e) | Ok(typeDefs, fds, rootName) -> @@ -538,7 +556,7 @@ let fns () : List = [ { name = "b"; typ = PT.TInt64; description = "" } ] returnType = PT.TInt64 description = "" } - match Bridge.bridgeFn Map.empty Map.empty "bridgedFn" ptFn with + match Bridge.bridgeFn Map.empty Map.empty Map.empty "bridgedFn" ptFn with | Error e -> outcome false $"bridge: {e}" |> Ply | Ok fd -> let program : AST.Program = @@ -570,8 +588,9 @@ let fns () : List = "Fetches a package function's ProgramTypes by hash, lowers it to compiler AST via the §6 bridge, compiles a call to it with , runs the native binary, and returns (true, ) or (false, ). Pure-core leaves only; anything the bridge can't lower hard-fails with an `unsupported-*` reason. (Dark resolves a name to its hash; this takes the hash.)" fn = (function - | _, _, _, [ DString hash; DList(_, argDvals) ] -> + | exeState, _, _, [ DString hash; DList(_, argDvals) ] -> uply { + let effectful = buildEffectfulMap exeState let argLits = argDvals |> List.choose (fun d -> @@ -583,7 +602,7 @@ let fns () : List = elif List.isEmpty argLits then return outcome false "need >= 1 arg (nullary calls not yet supported)" else - let! pieces = buildPieces hash + let! pieces = buildPieces effectful hash match pieces with | Error e -> return outcome false e | Ok(typeDefs, fds, rootName) -> @@ -612,9 +631,9 @@ let fns () : List = "Checks whether a package function compiles via the §6 bridge, WITHOUT running it: fetches its ProgramTypes by hash, lowers to compiler AST, makes it reachable with zero-valued args, and compiles. Returns (true, \" bytes\") if it compiles or (false, \"\") with the first blocker. This is the `dark compile` semantic (compilability, not execution)." fn = (function - | _, _, _, [ DString hash ] -> + | exeState, _, _, [ DString hash ] -> uply { - let! (ok, detail) = checkOne hash + let! (ok, detail) = checkOne (buildEffectfulMap exeState) hash return outcome ok detail } | _ -> incorrectArgs ()) @@ -632,13 +651,14 @@ let fns () : List = "The §4 bring-up loop, in ONE process (stdlib built once): compile-checks every fn hash and returns a newline-joined report, one `|` line per input hash in order (ok = true/false). Feed it every fn hash to get a whole-tree coverage number + ranked blockers without the per-process stdlib rebuild." fn = (function - | _, _, _, [ DList(_, hashes) ] -> + | exeState, _, _, [ DList(_, hashes) ] -> uply { + let effectful = buildEffectfulMap exeState let mutable lines : List = [] for hd in hashes do match hd with | DString hash -> - let! (ok, detail) = checkOne hash + let! (ok, detail) = checkOne effectful hash lines <- lines @ [ $"{ok}|{detail}" ] | _ -> lines <- lines @ [ "false|non-string-hash" ] return DString(String.concat "\n" lines) From b876eafb9f9473b5c9a430eeca651c0c4d4c536b Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 01:29:58 -0400 Subject: [PATCH 098/172] =?UTF-8?q?compiler:=20effectful=20fns=20RUN=20via?= =?UTF-8?q?=20the=20daemon=20=E2=80=94=20full=20seam=20live=20end-to-end?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Wired the host-RPC daemon into compileFnByHash's run path: startDaemon services builtin requests in a loop (read FIFO -> dispatch to the real builtin -> write response) while the compiled binary executes; shutdown sends a sentinel to unblock the FIFO read. hostRpc now deletes the response file after reading, so multi-call programs poll for a fresh response each time (no stale reads). PROVEN end-to-end on a real function: authored `emitNum (n: Int64): Unit = Builtin.printLine (Stdlib.Int64.toString n)`; compileFnByHash [42] -> the native binary called the routed pure Int64.toString, then routed printLine through hostRpc -> the daemon invoked the REAL printLine builtin -> "42" printed; result (true, "()"). Compiled native code invoking a real effectful builtin, effect and all. All gated; default build untouched. --- .../Builtins.Compiler/Libs/Compiler.fs | 55 ++++++++++++++++--- backend/src/LibCompiler/stdlib/Rpc.dark | 4 +- 2 files changed, 49 insertions(+), 10 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 9da6822bc3..2143a34a6d 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -424,21 +424,53 @@ let private dispatchBuiltin return dvalToWire result } +let private rpcReqFifo = "/tmp/dark-rpc-req" +let private rpcRespFile = "/tmp/dark-rpc-resp" +let private rpcShutdown = "__DARK_RPC_SHUTDOWN__" + /// Set up the channel and service ONE builtin request in a background task -/// (single-call v1; multi-call needs a read-until-EOF intrinsic / socket). +/// (used by the daemon self-test). let private serveOneRequest (exeState : ExecutionState) (vm : VMState) : System.Threading.Tasks.Task = - let reqFifo = "/tmp/dark-rpc-req" - let respFile = "/tmp/dark-rpc-resp" - for f in [ respFile; reqFifo ] do + for f in [ rpcRespFile; rpcReqFifo ] do if System.IO.File.Exists f then System.IO.File.Delete f - let psi = System.Diagnostics.ProcessStartInfo("mkfifo", reqFifo) + let psi = System.Diagnostics.ProcessStartInfo("mkfifo", rpcReqFifo) psi.UseShellExecute <- false (System.Diagnostics.Process.Start psi).WaitForExit() System.Threading.Tasks.Task.Run(fun () -> - let req = System.IO.File.ReadAllText reqFifo + let req = System.IO.File.ReadAllText rpcReqFifo let resp = (dispatchBuiltin exeState vm req |> Ply.toTask).Result - System.IO.File.WriteAllText(respFile + ".tmp", resp) - System.IO.File.Move(respFile + ".tmp", respFile, true)) + System.IO.File.WriteAllText(rpcRespFile + ".tmp", resp) + System.IO.File.Move(rpcRespFile + ".tmp", rpcRespFile, true)) + +/// Start a looping daemon that services builtin requests until shutdown. Each +/// request: read from the FIFO (blocks), dispatch, write the response file (the +/// compiled hostRpc deletes it after reading, so the next poll waits for a fresh +/// one). Returns the task + a shutdown fn (unblocks the FIFO read with a sentinel). +let private startDaemon + (exeState : ExecutionState) + (vm : VMState) + : System.Threading.Tasks.Task * (unit -> unit) = + for f in [ rpcRespFile; rpcReqFifo ] do + if System.IO.File.Exists f then System.IO.File.Delete f + let psi = System.Diagnostics.ProcessStartInfo("mkfifo", rpcReqFifo) + psi.UseShellExecute <- false + (System.Diagnostics.Process.Start psi).WaitForExit() + let task = + System.Threading.Tasks.Task.Run(fun () -> + let mutable running = true + while running do + let req = System.IO.File.ReadAllText rpcReqFifo // blocks until a writer + if req = rpcShutdown || req = "" then + running <- false + else + let resp = (dispatchBuiltin exeState vm req |> Ply.toTask).Result + System.IO.File.WriteAllText(rpcRespFile + ".tmp", resp) + System.IO.File.Move(rpcRespFile + ".tmp", rpcRespFile, true)) + let shutdown () = + try + System.IO.File.WriteAllText(rpcReqFifo, rpcShutdown) + with _ -> () + (task, shutdown) let fns () : List = [ { name = fn "compilerInfo" 0 @@ -588,7 +620,7 @@ let fns () : List = "Fetches a package function's ProgramTypes by hash, lowers it to compiler AST via the §6 bridge, compiles a call to it with , runs the native binary, and returns (true, ) or (false, ). Pure-core leaves only; anything the bridge can't lower hard-fails with an `unsupported-*` reason. (Dark resolves a name to its hash; this takes the hash.)" fn = (function - | exeState, _, _, [ DString hash; DList(_, argDvals) ] -> + | exeState, vm, _, [ DString hash; DList(_, argDvals) ] -> uply { let effectful = buildEffectfulMap exeState let argLits = @@ -612,7 +644,12 @@ let fns () : List = match compileClosure typeDefs fds (mainCall rootFd argLits) with | Error e -> return outcome false $"compile: {e}" | Ok binary -> + // Start the host-RPC daemon so any effectful builtins the fn + // calls are serviced by the real runtime, then run the binary. + let (daemon, shutdown) = startDaemon exeState vm let out = CompilerLibrary.execute 0 binary + shutdown () + daemon.Wait() return (if out.ExitCode = 0 then outcome true out.Stdout else outcome false $"exit {out.ExitCode}: {out.Stderr}") diff --git a/backend/src/LibCompiler/stdlib/Rpc.dark b/backend/src/LibCompiler/stdlib/Rpc.dark index c6ddcbdc52..87257895a8 100644 --- a/backend/src/LibCompiler/stdlib/Rpc.dark +++ b/backend/src/LibCompiler/stdlib/Rpc.dark @@ -8,7 +8,9 @@ def Stdlib.hostRpcPoll(u: Unit) : String = if Stdlib.File.exists("/tmp/dark-rpc-resp") then - Stdlib.Result.withDefault(Stdlib.File.readText("/tmp/dark-rpc-resp"), "") + let r = Stdlib.Result.withDefault(Stdlib.File.readText("/tmp/dark-rpc-resp"), "") in + let _ = Stdlib.File.delete("/tmp/dark-rpc-resp") in + r else Stdlib.hostRpcPoll(()) From 977b649d75c62716fb548e2e1bd96191728e6a69 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 01:33:57 -0400 Subject: [PATCH 099/172] compiler: generalize effectful-builtin arg marshalling (Int/Bool via toString) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The effectful map now carries per-arg wire types (WireArg = WAString/WAInt/WABool) and the bridge stringifies each arg accordingly (Int -> Stdlib.Int64.toString, Bool -> Stdlib.Bool.toString) before building the request. Routable = all args in {String,Int,Bool} and return in {Unit,String}. Coverage flat at 755/3900 (19.4%): the ~963 remaining effectful builtins are blocked by their RETURN types (Result/Option/List), not args — container marshalling (recursive Dval<->wire for both directions) is the remaining Phase A3 lever and a real multi-day sub-project. The scalar seam is complete and live. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 55 +++++++++++++------ .../Builtins.Compiler/Libs/Compiler.fs | 25 ++++++--- 2 files changed, 56 insertions(+), 24 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 1b5e3b6f07..7b89ae5d37 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -32,14 +32,21 @@ type TypeEntry = /// Threaded through expression bridging. `Params` maps EArg indices to the /// enclosing fn's compiler-side param names; `Self` is the current fn's compiled /// name (for ESelf recursion); `Values` inlines referenced package constants. +/// How a wire-marshalable builtin arg is stringified on the compiled side. +type WireArg = + | WAString + | WAInt + | WABool + type BridgeCtx = { Params : string[] Self : string Values : Map - /// Effectful builtins routable through the host RPC seam: name -> returns-a- - /// String (true) vs returns Unit (false). Presence implies all args are - /// String (only those are wire-marshalable in v1). Built from the live runtime. - Effectful : Map } + /// Effectful builtins routable through the host RPC seam: name -> (per-arg + /// wire types, returns-a-String?). Return is Unit (false) or String (true); + /// Int-returning builtins aren't routable yet (no string->int on the compiled + /// side). Built from the live runtime. + Effectful : Map } let private err (category : string) (detail : string) : Result<'a, string> = Error $"unsupported-{category}: {detail}" @@ -406,22 +413,36 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = // request = "name\narg0\narg1…" (all args String), result per the // builtin's return type. match Map.tryFind b.name ctx.Effectful with - | Some retIsString -> + | Some(argWires, retIsString) -> args |> NEList.toList |> List.map recurse |> allOk - |> Result.map (fun bas -> - let request = - (AST.StringLiteral b.name, bas) - ||> List.fold (fun acc arg -> - AST.BinOp( - AST.StringConcat, - AST.BinOp(AST.StringConcat, acc, AST.StringLiteral "\n"), - arg)) - let call = AST.Call("Stdlib.hostRpc", AST.NonEmptyList.singleton request) - if retIsString then call - else AST.Let("__rpc_ignore", call, AST.UnitLiteral)) + |> Result.bind (fun bas -> + if List.length bas <> List.length argWires then + err "builtin" $"{b.name}: arg count mismatch" + else + // stringify each arg per its wire type + let marshaled = + List.map2 + (fun w a -> + match w with + | WAString -> a + | WAInt -> AST.Call("Stdlib.Int64.toString", AST.NonEmptyList.singleton a) + | WABool -> AST.Call("Stdlib.Bool.toString", AST.NonEmptyList.singleton a)) + argWires + bas + let request = + (AST.StringLiteral b.name, marshaled) + ||> List.fold (fun acc arg -> + AST.BinOp( + AST.StringConcat, + AST.BinOp(AST.StringConcat, acc, AST.StringLiteral "\n"), + arg)) + let call = AST.Call("Stdlib.hostRpc", AST.NonEmptyList.singleton request) + Ok( + if retIsString then call + else AST.Let("__rpc_ignore", call, AST.UnitLiteral))) | None -> err "builtin" $"{b.name}_v{b.version}" | PT.FQFnName.Package(PT.Hash h) -> let bridgedArgs = args |> NEList.toList |> List.map recurse |> allOk @@ -643,7 +664,7 @@ let bridgeTypeDef let bridgeFn (types : Map) (values : Map) - (effectful : Map) + (effectful : Map) (compiledName : string) (fn : PT.PackageFn.PackageFn) : Result = diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 2143a34a6d..076d8369df 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -136,22 +136,33 @@ let rec private fetchValueClosure /// Effectful builtins routable through the host RPC seam, from the live runtime: /// name -> returns-String (true) / returns-Unit (false); included only when all /// params are String (the wire-marshalable subset in v1). -let private buildEffectfulMap (exeState : ExecutionState) : Map = +let private buildEffectfulMap + (exeState : ExecutionState) + : Map = exeState.fns.builtIn |> Map.toList |> List.choose (fun (name, bfn) -> - let allStringArgs = bfn.parameters |> List.forall (fun p -> p.typ = TString) - if not allStringArgs then + let argWires = + bfn.parameters + |> List.map (fun p -> + match p.typ with + | TString -> Some Bridge.WAString + | TInt64 -> Some Bridge.WAInt + | TInt -> Some Bridge.WAInt + | TBool -> Some Bridge.WABool + | _ -> None) + if List.exists Option.isNone argWires then None else + let wires = argWires |> List.map Option.get match bfn.returnType with - | TUnit -> Some(name.name, false) - | TString -> Some(name.name, true) + | TUnit -> Some(name.name, (wires, false)) + | TString -> Some(name.name, (wires, true)) | _ -> None) |> Map.ofList let private buildPieces - (effectful : Map) + (effectful : Map) (rootHash : string) : Ply * List * string, string>> = uply { @@ -326,7 +337,7 @@ let rec private zeroValue /// Compile-check one package fn by hash (bridge its call-graph, make it /// reachable with zero-valued args, compile — don't run). Returns (ok, detail). /// Wrapped so an unexpected crash in one fn can't abort a batch sweep. -let private checkOne (effectful : Map) (hash : string) : Ply = +let private checkOne (effectful : Map) (hash : string) : Ply = uply { try let! pieces = buildPieces effectful hash From f68f2f8ef3817a543a1dbad2bfb28442bfff63c1 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 01:40:14 -0400 Subject: [PATCH 100/172] =?UTF-8?q?compiler:=20container-return=20marshall?= =?UTF-8?q?ing=20=E2=80=94=20Option/Result=20effectful=20builtins=20live?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The seam now handles the common container return types. Daemon: dvalToWire is recursive and marshals a DEnum (Option/Result) as "" or "\n". Bridge: unmarshalReturn generates AST to parse the wire response back into a native value per WireRet (Unit/String/Option/Result/ Result) — startsWith + slice + Stdlib.Option/Result constructors. buildEffectfulMap detects these return types structurally (TypeReference.option/result). PROVEN + diff-matched: `getHome (u) = Option.withDefault (Builtin.environmentGet "HOME") "NO-HOME"`; compileFnByHash -> the effectful environmentGet routes through the daemon, its Option result is marshalled/unmarshalled, withDefault extracts -> (true, "/home/dark") == interpreter. Effectful builtins returning Option/Result now compile AND run correctly from native code. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 62 ++++++++++++++++--- .../Builtins.Compiler/Libs/Compiler.fs | 36 +++++++---- 2 files changed, 77 insertions(+), 21 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 7b89ae5d37..af7339cd27 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -38,15 +38,21 @@ type WireArg = | WAInt | WABool +/// How a builtin's wire response is unmarshaled back into a native value. +type WireRet = + | WRUnit + | WRString + | WROptString // Option + | WRResStrStr // Result + | WRResUnitStr // Result + type BridgeCtx = { Params : string[] Self : string Values : Map /// Effectful builtins routable through the host RPC seam: name -> (per-arg - /// wire types, returns-a-String?). Return is Unit (false) or String (true); - /// Int-returning builtins aren't routable yet (no string->int on the compiled - /// side). Built from the live runtime. - Effectful : Map } + /// wire types, return wire type). Built from the live runtime. + Effectful : Map } let private err (category : string) (detail : string) : Result<'a, string> = Error $"unsupported-{category}: {detail}" @@ -326,6 +332,46 @@ let rec private bindPattern |> Result.bind (fun inner -> bindPattern p (AST.TupleAccess(AST.Var tmp, i)) inner) build 0 subs |> Result.map (fun inner -> AST.Let(tmp, value, inner)) +/// Unmarshal a host-RPC wire response (an AST expr producing the String) back +/// into a native value, per the builtin's return wire type. Option/Result wire +/// format: "" or "\n" (case-prefix length: Some/Ok/Error). +let private unmarshalReturn (ret : WireRet) (call : AST.Expr) : AST.Expr = + let optT = "Stdlib.Option.Option" + let resT = "Stdlib.Result.Result" + let r = AST.Var "__rpc_r" + let len e = AST.Call("Stdlib.String.length", AST.NonEmptyList.singleton e) + let slice e a b = + AST.Call("Stdlib.String.slice", AST.NonEmptyList.fromList [ e; a; b ]) + let starts e p = + AST.Call("Stdlib.String.startsWith", AST.NonEmptyList.fromList [ e; AST.StringLiteral p ]) + match ret with + | WRString -> call + | WRUnit -> AST.Let("__rpc_ignore", call, AST.UnitLiteral) + | WROptString -> + AST.Let( + "__rpc_r", + call, + AST.If( + starts r "Some\n", + AST.Constructor(optT, "Some", Some(slice r (AST.Int64Literal 5L) (len r))), + AST.Constructor(optT, "None", None))) + | WRResUnitStr -> + AST.Let( + "__rpc_r", + call, + AST.If( + starts r "Error\n", + AST.Constructor(resT, "Error", Some(slice r (AST.Int64Literal 6L) (len r))), + AST.Constructor(resT, "Ok", Some AST.UnitLiteral))) + | WRResStrStr -> + AST.Let( + "__rpc_r", + call, + AST.If( + starts r "Error\n", + AST.Constructor(resT, "Error", Some(slice r (AST.Int64Literal 6L) (len r))), + AST.Constructor(resT, "Ok", Some(slice r (AST.Int64Literal 3L) (len r))))) + let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = let recurse = bridgeExpr ctx match e with @@ -413,7 +459,7 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = // request = "name\narg0\narg1…" (all args String), result per the // builtin's return type. match Map.tryFind b.name ctx.Effectful with - | Some(argWires, retIsString) -> + | Some(argWires, wireRet) -> args |> NEList.toList |> List.map recurse @@ -440,9 +486,7 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = AST.BinOp(AST.StringConcat, acc, AST.StringLiteral "\n"), arg)) let call = AST.Call("Stdlib.hostRpc", AST.NonEmptyList.singleton request) - Ok( - if retIsString then call - else AST.Let("__rpc_ignore", call, AST.UnitLiteral))) + Ok(unmarshalReturn wireRet call)) | None -> err "builtin" $"{b.name}_v{b.version}" | PT.FQFnName.Package(PT.Hash h) -> let bridgedArgs = args |> NEList.toList |> List.map recurse |> allOk @@ -664,7 +708,7 @@ let bridgeTypeDef let bridgeFn (types : Map) (values : Map) - (effectful : Map) + (effectful : Map) (compiledName : string) (fn : PT.PackageFn.PackageFn) : Result = diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 076d8369df..ff0d8d1475 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -138,7 +138,10 @@ let rec private fetchValueClosure /// params are String (the wire-marshalable subset in v1). let private buildEffectfulMap (exeState : ExecutionState) - : Map = + : Map = + let optStr = TypeReference.option TString + let resStrStr = TypeReference.result TString TString + let resUnitStr = TypeReference.result TUnit TString exeState.fns.builtIn |> Map.toList |> List.choose (fun (name, bfn) -> @@ -151,18 +154,22 @@ let private buildEffectfulMap | TInt -> Some Bridge.WAInt | TBool -> Some Bridge.WABool | _ -> None) - if List.exists Option.isNone argWires then - None - else - let wires = argWires |> List.map Option.get + let wireRet = match bfn.returnType with - | TUnit -> Some(name.name, (wires, false)) - | TString -> Some(name.name, (wires, true)) - | _ -> None) + | TUnit -> Some Bridge.WRUnit + | TString -> Some Bridge.WRString + | t when t = optStr -> Some Bridge.WROptString + | t when t = resStrStr -> Some Bridge.WRResStrStr + | t when t = resUnitStr -> Some Bridge.WRResUnitStr + | _ -> None + match wireRet with + | Some ret when not (List.exists Option.isNone argWires) -> + Some(name.name, (argWires |> List.map Option.get, ret)) + | _ -> None) |> Map.ofList let private buildPieces - (effectful : Map) + (effectful : Map) (rootHash : string) : Ply * List * string, string>> = uply { @@ -337,7 +344,7 @@ let rec private zeroValue /// Compile-check one package fn by hash (bridge its call-graph, make it /// reachable with zero-valued args, compile — don't run). Returns (ok, detail). /// Wrapped so an unexpected crash in one fn can't abort a batch sweep. -let private checkOne (effectful : Map) (hash : string) : Ply = +let private checkOne (effectful : Map) (hash : string) : Ply = uply { try let! pieces = buildPieces effectful hash @@ -379,9 +386,14 @@ let private outcome (ok : bool) (detail : string) : Dval = // v1 marshals scalars only; container types are TODO. (BUILTINS-ARCHITECTURE.md) // --------------------------------------------------------------------------- -/// Scalar Dval -> wire string. -let private dvalToWire (d : Dval) : string = +/// Dval -> wire string. Scalars are literal; an enum (Option/Result) becomes +/// "" (nullary) or "\n" (recursively marshaled). +let rec private dvalToWire (d : Dval) : string = match d with + | DEnum(_, _, _, caseName, []) -> caseName + | DEnum(_, _, _, caseName, [ payload ]) -> caseName + "\n" + dvalToWire payload + | DEnum(_, _, _, caseName, fields) -> + caseName + "\n" + (fields |> List.map dvalToWire |> String.concat "") | DString s -> s | DInt n -> string (DarkInt.toBigInt n) | DInt8 n -> string n From b1842eaa5cf5fdcc61be07b41172ca9095fa5ff3 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 08:49:09 -0400 Subject: [PATCH 101/172] compiler: arg-synthesis handles generic + recursive types (769 -> 962) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The reachability harness synthesizes zero-valued args to make a fn compilable without running it. Two gaps kept ~200 fns from ever reaching the compiler: - Generic type defs were zeroed from their *raw* field types, so a field typed `T` hit "no zero literal for TVar". Now zeroValue threads the concrete type args off the reference (TRecord/TSum name+args) through a defSubst over the def's declared type params before recursing — an unmapped tvar monomorphizes at Int64, matching mainCall's generic-root instantiation. - Recursive sum types (`Nil | Cons of ...`) failed on the seen-guard because zeroValue forced the first-declared variant. It now tries variants in order and takes the first that terminates — the non-recursive base case. Also: bridgeFn now declares every free type var in a signature (not just PT's typeParams list) so the monomorphic entry point is well-formed. Whole-tree sweep: 769 -> 962 / 3900 (24.7%). arg-synthesis drops from the #3 blocker (487) to noise (88); the frontier is now unsupported-builtin (926), TUuid (499), and a bridgeType TypeReference gap (339). --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 26 ++++++++++- .../Builtins.Compiler/Libs/Compiler.fs | 45 ++++++++++++++----- 2 files changed, 60 insertions(+), 11 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index af7339cd27..ff91de50cd 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -702,6 +702,22 @@ let bridgeTypeDef // Functions // --------------------------------------------------------------------------- +/// Every type variable appearing in a compiler type. Darklang signatures carry +/// free type vars (e.g. `'v`) that PT's `typeParams` list doesn't always +/// enumerate; the compiler FunctionDef must declare all of them or the reachability +/// harness can't monomorphize (no zero literal for an undeclared TVar). +let rec freeTVars (t : AST.Type) : Set = + match t with + | AST.TVar v -> Set.singleton v + | AST.TRecord(_, args) + | AST.TSum(_, args) -> args |> List.map freeTVars |> Set.unionMany + | AST.TList inner -> freeTVars inner + | AST.TTuple ts -> ts |> List.map freeTVars |> Set.unionMany + | AST.TDict(k, v) -> Set.union (freeTVars k) (freeTVars v) + | AST.TFunction(args, ret) -> + Set.union (args |> List.map freeTVars |> Set.unionMany) (freeTVars ret) + | _ -> Set.empty + /// Lower a package function to a compiler FunctionDef under the given /// compiler-side name. Params keep their Dark names (positional EArg refs and /// any by-name refs both resolve). Generics are not yet supported. @@ -729,8 +745,16 @@ let bridgeFn |> Result.bind (fun retType -> bridgeExpr ctx fn.body |> Result.map (fun body -> + // Declare every type var the signature actually uses — declared params + // first (preserving order), then any free tvars PT didn't enumerate. + let sigTVars = + (ps |> List.map (snd >> freeTVars) |> Set.unionMany) + |> Set.union (freeTVars retType) + let declared = fn.typeParams + let extra = + sigTVars |> Set.toList |> List.filter (fun v -> not (List.contains v declared)) ({ Name = compiledName - TypeParams = fn.typeParams + TypeParams = declared @ extra Params = AST.NonEmptyList.fromList ps ReturnType = retType Body = body } : AST.FunctionDef)))) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index ff0d8d1475..a94b89a368 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -308,37 +308,62 @@ let rec private zeroLit (t : AST.Type) : Result = /// A zero value for any bridged type — including records/enums, built from the /// bridged type defs — so compileFnCheck can make a fn taking custom-type params /// reachable. `seen` guards against infinite recursion on recursive types. +/// Build a type-var substitution for a generic type def instantiated with `args`: +/// each declared type param maps to its positional arg, or Int64 when the type is +/// referenced with fewer args than params (the harness only needs *a* concrete +/// monomorphization to check compilability). +let private defSubst (typeParams : string list) (args : AST.Type list) : Map = + typeParams + |> List.mapi (fun i tp -> (tp, List.tryItem i args |> Option.defaultValue AST.TInt64)) + |> Map.ofList + let rec private zeroValue (defs : Map) (seen : Set) (t : AST.Type) : Result = match t with - | AST.TRecord(name, _) -> + | AST.TRecord(name, args) -> if Set.contains name seen then Error $"recursive type {name}" else match Map.tryFind name defs with - | Some(AST.RecordDef(_, _, fields)) -> + | Some(AST.RecordDef(_, tps, fields)) -> + // Instantiate the generic def's type params with the reference's args, so + // a field typed `T` becomes its concrete type before we synthesize a zero. + let subst = defSubst tps args fields |> List.map (fun (fname, ft) -> - zeroValue defs (Set.add name seen) ft |> Result.map (fun v -> (fname, v))) + zeroValue defs (Set.add name seen) (substTVars subst ft) + |> Result.map (fun v -> (fname, v))) |> allOk |> Result.map (fun fs -> AST.RecordLiteral(name, fs)) | _ -> Error $"no record def {name}" - | AST.TSum(name, _) -> + | AST.TSum(name, args) -> if Set.contains name seen then Error $"recursive type {name}" else match Map.tryFind name defs with - | Some(AST.SumTypeDef(_, _, variant :: _)) -> - match variant.Payload with - | None -> Ok(AST.Constructor(name, variant.Name, None)) - | Some pt -> - zeroValue defs (Set.add name seen) pt - |> Result.map (fun pv -> AST.Constructor(name, variant.Name, Some pv)) + | Some(AST.SumTypeDef(_, tps, variants)) when not (List.isEmpty variants) -> + let subst = defSubst tps args + // Try variants in order; a recursive type (e.g. `Nil | Cons of ...`) is + // zeroable via its non-recursive base case, so take the first that + // terminates rather than forcing the first-declared variant. + let zeroed = + variants + |> List.tryPick (fun variant -> + match variant.Payload with + | None -> Some(AST.Constructor(name, variant.Name, None)) + | Some pt -> + match zeroValue defs (Set.add name seen) (substTVars subst pt) with + | Ok pv -> Some(AST.Constructor(name, variant.Name, Some pv)) + | Error _ -> None) + match zeroed with + | Some c -> Ok c + | None -> Error $"recursive type {name}" | _ -> Error $"no sum def {name}" | AST.TTuple ts -> ts |> List.map (zeroValue defs seen) |> allOk |> Result.map AST.TupleLiteral | AST.TList _ -> Ok(AST.ListLiteral []) + | AST.TVar _ -> zeroLit AST.TInt64 // an unmapped signature tvar: monomorphize at Int64 | prim -> zeroLit prim /// Compile-check one package fn by hash (bridge its call-graph, make it From 305d3366fa0006717fef924871d375b5f6be72bb Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 08:56:37 -0400 Subject: [PATCH 102/172] compiler: bridge TBlob + EFloat; value closure bridges to a fixpoint (962 -> 973) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit - TBlob -> compiler TBytes (was the entire 339-fn "TypeReference" bucket); its arg-synthesis zero is an empty blob via the __int64_to_bytes cast intrinsic (harness-only, never run). Those fns now bridge past the type and surface their next real blocker instead. - EFloat literals now lower via Prelude.makeFloat — bit-identical to the interpreter's own float construction. - The package-constant closure bridged in a single ordered pass, silently dropping any value that forward-referenced a later one. It now iterates to a fixpoint so dependency order doesn't matter. Sweep: 962 -> 973 / 3900 (24.9%). --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 5 ++++ .../Builtins.Compiler/Libs/Compiler.fs | 28 ++++++++++++++----- 2 files changed, 26 insertions(+), 7 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index ff91de50cd..6cffd796d5 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -220,6 +220,7 @@ let rec bridgeType (NEList.toList args |> List.map recurse |> allOk, recurse ret) |> fun (a, r) -> a |> Result.bind (fun args' -> r |> Result.map (fun ret' -> AST.TFunction(args', ret'))) + | PT.TBlob -> Ok AST.TBytes | PT.TDB _ -> err "type" "TDB" | PT.TUuid -> err "type" "TUuid" | PT.TDateTime -> err "type" "TDateTime" @@ -382,6 +383,10 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = else err "literal" "Int outside Int64 range" | PT.EBool(_, b) -> Ok(AST.BoolLiteral b) + | PT.EFloat(_, sign, whole, fraction) -> + // Same construction the interpreter uses (Prelude.makeFloat), so a compiled + // float literal is bit-identical to the interpreted one. + Ok(AST.FloatLiteral(makeFloat sign whole fraction)) | PT.EUnit _ -> Ok AST.UnitLiteral | PT.EString(_, [ PT.StringText s ]) -> Ok(AST.StringLiteral s) | PT.EString(_, segments) -> diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index a94b89a368..93dbb2bb5d 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -221,14 +221,23 @@ let private buildPieces |> List.map (fun (h, pt) -> Bridge.bridgeTypeDef typeEnv (Bridge.nameForType h) pt) |> allOk // Bridge each package constant's body (no params/self) into an inline - // expression, accumulating so a value can reference an earlier one. - let valuesMap = - (Map.empty, values) + // expression. A value can reference another value; the fetch order isn't + // dependency order, so iterate to a fixpoint — each pass bridges any value + // whose referenced values are now in the map — rather than dropping a + // forward reference on a single ordered pass. + let bridgeValuesOnce (m : Map) : Map = + (m, values) ||> List.fold (fun m (h, pv) -> - let ctx : Bridge.BridgeCtx = { Params = [||]; Self = ""; Values = m; Effectful = Map.empty } - match Bridge.bridgeExpr ctx pv.body with - | Ok e -> Map.add h e m - | Error _ -> m) + if Map.containsKey h m then m + else + let ctx : Bridge.BridgeCtx = { Params = [||]; Self = ""; Values = m; Effectful = Map.empty } + match Bridge.bridgeExpr ctx pv.body with + | Ok e -> Map.add h e m + | Error _ -> m) + let rec fixpoint (m : Map) : Map = + let m' = bridgeValuesOnce m + if Map.count m' = Map.count m then m' else fixpoint m' + let valuesMap = fixpoint Map.empty let fnDefs = fns |> List.map (fun (h, fn) -> Bridge.bridgeFn typeEnv valuesMap effectful (Bridge.nameFor h) fn) @@ -364,6 +373,11 @@ let rec private zeroValue ts |> List.map (zeroValue defs seen) |> allOk |> Result.map AST.TupleLiteral | AST.TList _ -> Ok(AST.ListLiteral []) | AST.TVar _ -> zeroLit AST.TInt64 // an unmapped signature tvar: monomorphize at Int64 + | AST.TBytes -> + // No bytes literal exists in the AST; synthesize an empty blob via the cast + // intrinsic. Only ever used to make a fn reachable for a compile-check (never + // run), so it just needs to typecheck to Bytes. + Ok(AST.Call("Stdlib.__int64_to_bytes", AST.NonEmptyList.fromList [ AST.Int64Literal 0L ])) | prim -> zeroLit prim /// Compile-check one package fn by hash (bridge its call-graph, make it From f355e529b8137fcfbdc775b1929224219b3e8506 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 09:07:16 -0400 Subject: [PATCH 103/172] compiler: widen the RPC seam to Int/Bool/Float wire types (973 -> 1038) The host-RPC seam marshaled only String/Unit args and String/Unit/Option-String/ Result-String returns. Widened both directions along the same seam: - WireArg gains WAFloat (marshaled via Stdlib.Float.toString). - WireRet gains WRInt, WRBool, and WRResIntStr (Result). - buildEffectfulMap admits Float params and Int64/Bool/Result returns, computed from the live runtime as before. - The compiled side has no Int64.parse, so Rpc.dark now carries a codepoint int parser (hostRpcParseInt). Negatives accumulate downward so Int64.MIN is representable rather than overflowing a parse-magnitude-then-negate. Differential-tested in isolation: hostRpcParseInt round-trips 12345, -42, 0, and Int64.MAX/MIN correctly (the MIN *display* hits a pre-existing compiler-stdlib Int64.toString overflow bug, unrelated to the parser or the seam). Sweep: 973 -> 1038 / 3900 (26.6%). unsupported-builtin 1069 -> 962. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 19 +++++++++++++++- .../Builtins.Compiler/Libs/Compiler.fs | 6 +++++ backend/src/LibCompiler/stdlib/Rpc.dark | 22 +++++++++++++++++++ 3 files changed, 46 insertions(+), 1 deletion(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 6cffd796d5..c2d628d40c 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -37,14 +37,18 @@ type WireArg = | WAString | WAInt | WABool + | WAFloat /// How a builtin's wire response is unmarshaled back into a native value. type WireRet = | WRUnit | WRString + | WRInt // Int64 + | WRBool | WROptString // Option | WRResStrStr // Result | WRResUnitStr // Result + | WRResIntStr // Result type BridgeCtx = { Params : string[] @@ -345,8 +349,12 @@ let private unmarshalReturn (ret : WireRet) (call : AST.Expr) : AST.Expr = AST.Call("Stdlib.String.slice", AST.NonEmptyList.fromList [ e; a; b ]) let starts e p = AST.Call("Stdlib.String.startsWith", AST.NonEmptyList.fromList [ e; AST.StringLiteral p ]) + let parseInt e = AST.Call("Stdlib.hostRpcParseInt", AST.NonEmptyList.singleton e) match ret with | WRString -> call + | WRInt -> parseInt call + | WRBool -> + AST.Let("__rpc_r", call, AST.Call("Stdlib.String.equals", AST.NonEmptyList.fromList [ r; AST.StringLiteral "true" ])) | WRUnit -> AST.Let("__rpc_ignore", call, AST.UnitLiteral) | WROptString -> AST.Let( @@ -372,6 +380,14 @@ let private unmarshalReturn (ret : WireRet) (call : AST.Expr) : AST.Expr = starts r "Error\n", AST.Constructor(resT, "Error", Some(slice r (AST.Int64Literal 6L) (len r))), AST.Constructor(resT, "Ok", Some(slice r (AST.Int64Literal 3L) (len r))))) + | WRResIntStr -> + AST.Let( + "__rpc_r", + call, + AST.If( + starts r "Error\n", + AST.Constructor(resT, "Error", Some(slice r (AST.Int64Literal 6L) (len r))), + AST.Constructor(resT, "Ok", Some(parseInt (slice r (AST.Int64Literal 3L) (len r)))))) let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = let recurse = bridgeExpr ctx @@ -480,7 +496,8 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = match w with | WAString -> a | WAInt -> AST.Call("Stdlib.Int64.toString", AST.NonEmptyList.singleton a) - | WABool -> AST.Call("Stdlib.Bool.toString", AST.NonEmptyList.singleton a)) + | WABool -> AST.Call("Stdlib.Bool.toString", AST.NonEmptyList.singleton a) + | WAFloat -> AST.Call("Stdlib.Float.toString", AST.NonEmptyList.singleton a)) argWires bas let request = diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 93dbb2bb5d..88a049cf97 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -142,6 +142,7 @@ let private buildEffectfulMap let optStr = TypeReference.option TString let resStrStr = TypeReference.result TString TString let resUnitStr = TypeReference.result TUnit TString + let resIntStr = TypeReference.result TInt64 TString exeState.fns.builtIn |> Map.toList |> List.choose (fun (name, bfn) -> @@ -153,14 +154,19 @@ let private buildEffectfulMap | TInt64 -> Some Bridge.WAInt | TInt -> Some Bridge.WAInt | TBool -> Some Bridge.WABool + | TFloat -> Some Bridge.WAFloat | _ -> None) let wireRet = match bfn.returnType with | TUnit -> Some Bridge.WRUnit | TString -> Some Bridge.WRString + | TInt64 -> Some Bridge.WRInt + | TInt -> Some Bridge.WRInt + | TBool -> Some Bridge.WRBool | t when t = optStr -> Some Bridge.WROptString | t when t = resStrStr -> Some Bridge.WRResStrStr | t when t = resUnitStr -> Some Bridge.WRResUnitStr + | t when t = resIntStr -> Some Bridge.WRResIntStr | _ -> None match wireRet with | Some ret when not (List.exists Option.isNone argWires) -> diff --git a/backend/src/LibCompiler/stdlib/Rpc.dark b/backend/src/LibCompiler/stdlib/Rpc.dark index 87257895a8..7723ce69e8 100644 --- a/backend/src/LibCompiler/stdlib/Rpc.dark +++ b/backend/src/LibCompiler/stdlib/Rpc.dark @@ -17,3 +17,25 @@ def Stdlib.hostRpcPoll(u: Unit) : String = def Stdlib.hostRpc(request: String) : String = let _ = Stdlib.File.writeText("/tmp/dark-rpc-req", request) in Stdlib.hostRpcPoll(()) + +// --- wire-response parsers (unmarshal numeric returns from the daemon) --- +// The daemon marshals a builtin's return value to a decimal string; the compiled +// side has no Int64.parse, so these reconstruct the native value from codepoints. + +def Stdlib.hostRpcDigits(cps: List, acc: Int64) : Int64 = + match cps with + | [] -> acc + | [h, ...t] -> Stdlib.hostRpcDigits(t, acc * 10 + (h - 48)) + +// Negatives accumulate downward so Int64.MIN (whose magnitude exceeds MAX) is +// representable — parsing the magnitude then negating would overflow and crash. +def Stdlib.hostRpcDigitsNeg(cps: List, acc: Int64) : Int64 = + match cps with + | [] -> acc + | [h, ...t] -> Stdlib.hostRpcDigitsNeg(t, acc * 10 - (h - 48)) + +def Stdlib.hostRpcParseInt(s: String) : Int64 = + if Stdlib.String.startsWith(s, "-") then + Stdlib.hostRpcDigitsNeg(Stdlib.String.toCodepoints(Stdlib.String.dropFirst(s, 1)), 0) + else + Stdlib.hostRpcDigits(Stdlib.String.toCodepoints(s), 0) From b1920ee303aaa1bba8ba7ccbf89f04fe03639587 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 09:12:44 -0400 Subject: [PATCH 104/172] compiler: carry Uuid/DateTime as host-opaque canonical strings (1038 -> 1053) Neither host type has a compiler representation. Rather than hard-fail every signature that mentions one, bridgeType lowers TUuid/TDateTime to TString and the daemon marshals the value to/from its canonical form (Guid string, ISO-8601). This is sound for well-typed Dark: a Uuid/DateTime is opaque (passed, stored in records, compared by equality), and every builtin that produces or consumes one round-trips through the seam, so the compiled value never diverges from the interpreter's. - Uuid: full round-trip (dvalToWire `string g`, wireToDval `Guid.Parse`), both as arg and return. - DateTime: return-only for now (dvalToWire via DarkDateTime.toIsoString); wire->DateTime ISO parsing on the arg side is deferred. Sweep: 1038 -> 1053 / 3900 (27.0%). The 551-fn TUuid+TDateTime type-blocker is gone; those fns now surface their next blocker (mostly builtins and Dict). --- backend/src/Builtins/Builtins.Compiler/Bridge.fs | 9 +++++++-- .../src/Builtins/Builtins.Compiler/Libs/Compiler.fs | 10 ++++++++++ 2 files changed, 17 insertions(+), 2 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index c2d628d40c..b129871eb0 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -226,8 +226,13 @@ let rec bridgeType a |> Result.bind (fun args' -> r |> Result.map (fun ret' -> AST.TFunction(args', ret'))) | PT.TBlob -> Ok AST.TBytes | PT.TDB _ -> err "type" "TDB" - | PT.TUuid -> err "type" "TUuid" - | PT.TDateTime -> err "type" "TDateTime" + // Host types with no compiler representation are carried as their canonical + // string form. Sound for well-typed programs: Dark treats a Uuid/DateTime + // opaquely (pass, store, compare-by-equality), and every builtin that produces + // or consumes one marshals through the daemon (Guid/ISO string round-trip), so + // the compiled value stays in lockstep with the interpreter's. + | PT.TUuid -> Ok AST.TString + | PT.TDateTime -> Ok AST.TString | other -> err "type" (other.GetType().Name) // --------------------------------------------------------------------------- diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 88a049cf97..cb376c9d7c 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -155,6 +155,10 @@ let private buildEffectfulMap | TInt -> Some Bridge.WAInt | TBool -> Some Bridge.WABool | TFloat -> Some Bridge.WAFloat + // Host-opaque types travel as their canonical string (see bridgeType). + // Uuid round-trips cleanly (Guid parse); DateTime args are omitted until + // wire->DateTime ISO parsing is in (return-only for now). + | TUuid -> Some Bridge.WAString | _ -> None) let wireRet = match bfn.returnType with @@ -163,6 +167,8 @@ let private buildEffectfulMap | TInt64 -> Some Bridge.WRInt | TInt -> Some Bridge.WRInt | TBool -> Some Bridge.WRBool + | TUuid -> Some Bridge.WRString + | TDateTime -> Some Bridge.WRString | t when t = optStr -> Some Bridge.WROptString | t when t = resStrStr -> Some Bridge.WRResStrStr | t when t = resUnitStr -> Some Bridge.WRResUnitStr @@ -455,6 +461,9 @@ let rec private dvalToWire (d : Dval) : string = | DUnit -> "unit" | DFloat f -> string f | DChar c -> c + // Host-opaque types -> canonical string (see Bridge.bridgeType for soundness). + | DUuid g -> string g + | DDateTime dt -> LibExecution.DarkDateTime.toIsoString dt | other -> $"?unmarshalable:{other.GetType().Name}" /// wire string -> scalar Dval, per the builtin param's declared type. @@ -466,6 +475,7 @@ let private wireToDval (t : TypeReference) (s : string) : Dval = | TUnit -> DUnit | TFloat -> DFloat(float s) | TChar -> DChar s + | TUuid -> DUuid(System.Guid.Parse s) | _ -> DString s /// Dispatch one request ("name\narg1\narg2…") to the real builtin, return the From bec5b090b12fcae632882321064ef82ef3c18ec1 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 09:17:06 -0400 Subject: [PATCH 105/172] compiler: bridge bare function references as captureless closures MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit A function passed as a value (`List.map(xs, someFn)`, not called directly) hit the EFnName catch-all and hard-failed. It now lowers to the compiler's first-class function value — Closure(name, []): a package fn references its bridged name, a pure builtin references the native stdlib fn it routes to. Effectful builtins have no direct function value (they need the hostRpc wrapper), so a bare reference to one still hard-fails cleanly. Verified the compiler executes named-fn higher-order calls natively (List.map([1,2,3], dbl) runs). This is the same closure mechanism the bridge now emits, so bridged higher-order code runs on the same path. Sweep flat at 1053/3900 — the 131-fn EFnName category is gone but those fns are multi-blocker (they now surface builtins/generics). The frontier has narrowed to two walls: unsupported-builtin (1205, needs general container marshalling) and generic-typeargs (443, needs call-site type inference). --- backend/src/Builtins/Builtins.Compiler/Bridge.fs | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index b129871eb0..bca53555ae 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -602,6 +602,21 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = // `first; next` — evaluate first, discard, then next. recurse first |> Result.bind (fun f -> recurse next |> Result.map (fun n -> AST.Let("__dark_stmt", f, n))) + // A bare function reference (passed as a value, e.g. `List.map(xs, someFn)`) + // lowers to a captureless Closure — the compiler's first-class function value. + // A package fn references its bridged name; a pure builtin references the native + // stdlib fn it routes to. Effectful builtins have no direct function value (they + // need the hostRpc wrapper), so a bare reference to one hard-fails. + | PT.EFnName(_, nr) -> + match nr.resolved with + | Error _ -> err "fnref" "unresolved fn name" + | Ok resolved -> + match resolved.name with + | PT.FQFnName.Package(PT.Hash h) -> Ok(AST.Closure(nameFor h, [])) + | PT.FQFnName.Builtin b -> + match Map.tryFind b.name builtinToStdlib with + | Some stdlibFn -> Ok(AST.Closure(stdlibFn, [])) + | None -> err "fnref" $"effectful builtin as value: {b.name}" | _ -> err "expr" (e.GetType().Name) /// Lower one match case. A PT case has a single pattern (alternatives live in From a9e5561cf1d03e1a308cdabdc114ad101082f841 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 09:29:15 -0400 Subject: [PATCH 106/172] compiler: wire-format primitives for general Dval marshalling (foundation) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Adds the escape/unescape codec the general (recursive, composable) return marshaller will build on. Compound values escape each child then join with a raw newline, so a newline only ever separates children; escaping touches only backslash and newline (bytes that never occur mid-UTF-8), keeping it Unicode-safe. Differential-tested in isolation (compile+run) — unescape(escape(x)) == x on the adversarial cases naive double-replace gets wrong: a literal backslash-n, real embedded newlines, doubled backslashes, and non-ASCII payloads all round-trip. Not yet wired into the bridge; the recursive type-directed unmarshaller that consumes these lands next (Result, List, nested containers). --- backend/src/LibCompiler/stdlib/Rpc.dark | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/backend/src/LibCompiler/stdlib/Rpc.dark b/backend/src/LibCompiler/stdlib/Rpc.dark index 7723ce69e8..7615907153 100644 --- a/backend/src/LibCompiler/stdlib/Rpc.dark +++ b/backend/src/LibCompiler/stdlib/Rpc.dark @@ -39,3 +39,28 @@ def Stdlib.hostRpcParseInt(s: String) : Int64 = Stdlib.hostRpcDigitsNeg(Stdlib.String.toCodepoints(Stdlib.String.dropFirst(s, 1)), 0) else Stdlib.hostRpcDigits(Stdlib.String.toCodepoints(s), 0) + +// --- structural wire format (escape/unescape) --- +// Compound values (list elements, enum case+payload) escape each child then join +// with a raw newline, so a newline only ever separates children. Escaping touches +// only '\\' and newline (bytes that never occur mid-UTF-8), so it is Unicode-safe. + +def Stdlib.hostRpcEscape(s: String) : String = + // backslash first, then newline -> "\n" (so the introduced n isn't re-escaped) + Stdlib.String.replace(Stdlib.String.replace(s, "\\", "\\\\"), "\n", "\\n") + +def Stdlib.hostRpcUnescapeHelper(cps: List, escaping: Bool, acc: String) : String = + match cps with + | [] -> acc + | [h, ...t] -> + if escaping then + let ch = if h == 110 then "\n" else Stdlib.String.fromCodepoints([h]) in + Stdlib.hostRpcUnescapeHelper(t, false, acc ++ ch) + else + if h == 92 then + Stdlib.hostRpcUnescapeHelper(t, true, acc) + else + Stdlib.hostRpcUnescapeHelper(t, false, acc ++ Stdlib.String.fromCodepoints([h])) + +def Stdlib.hostRpcUnescape(s: String) : String = + Stdlib.hostRpcUnescapeHelper(Stdlib.String.toCodepoints(s), false, "") From dc20acff3abbe771fc1abc8da3854b39e687c729 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 09:40:52 -0400 Subject: [PATCH 107/172] compiler: bridge the remaining integer-literal widths MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit EInt8/EUInt8/EInt16/EUInt16/EInt32/EUInt32/EUInt64/EInt128/EUInt128 literals now lower to their AST.*Literal counterparts (only EInt64/EInt were handled). Each has a direct 1:1 compiler constructor. Rare in real code (+1 on the sweep) but removes a whole class of clean hard-fails. Note on the reverted work this session: mapping Dark's Option/Result to the compiler's native Stdlib.Option.Option/Result regressed 1053->743 — the typechecker resolves the native names for *construction* but not as declared types in signatures, so every Option/Result-signatured fn broke. The T_ representation stays. Unifying the two (the linchpin for general container marshalling) needs the compiler's structural type-identity behavior understood first (typesEqual resolves aliases — a TypeAlias to the native type may be the route). Sweep: 1054/3900 (27.0%). --- backend/src/Builtins/Builtins.Compiler/Bridge.fs | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index bca53555ae..7c0cc5c482 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -398,6 +398,15 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = let recurse = bridgeExpr ctx match e with | PT.EInt64(_, n) -> Ok(AST.Int64Literal n) + | PT.EInt8(_, n) -> Ok(AST.Int8Literal n) + | PT.EUInt8(_, n) -> Ok(AST.UInt8Literal n) + | PT.EInt16(_, n) -> Ok(AST.Int16Literal n) + | PT.EUInt16(_, n) -> Ok(AST.UInt16Literal n) + | PT.EInt32(_, n) -> Ok(AST.Int32Literal n) + | PT.EUInt32(_, n) -> Ok(AST.UInt32Literal n) + | PT.EUInt64(_, n) -> Ok(AST.UInt64Literal n) + | PT.EInt128(_, n) -> Ok(AST.Int128Literal n) + | PT.EUInt128(_, n) -> Ok(AST.UInt128Literal n) | PT.EInt(_, big) -> if big >= bigint System.Int64.MinValue && big <= bigint System.Int64.MaxValue then Ok(AST.Int64Literal(int64 big)) From e729a361423f6fdb4c044a6eb98800962a8d9b24 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 11:29:19 -0400 Subject: [PATCH 108/172] compiler: unify Dark Option/Result with the compiler's native types (1054 -> 1102) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Dark's Option/Result are ordinary package types; the bridge lowered them to distinct T_ sum types. But the compiler ships its OWN native Stdlib.Option.Option / Stdlib.Result.Result (its stdlib and the daemon's unmarshaller use them), so Option/Result existed as TWO non-unifying types whose Some/None/Ok/Error constructors were double-defined. Now both hashes map to the native names everywhere: - bridgeType lowers them to TSum("Stdlib.Option.Option"/…) independent of the type env; EEnum construction uses the native name (match patterns are by-name, so needed no change). - buildPieces drops them from the fetched type closure so no T_ TypeDef is emitted (that double-defined the constructors and made every use ambiguous — the cause of the first failed attempt at this). - zeroValue synthesizes their reachability zeros directly (None; Ok, or Error as a fallback), since they no longer have an emitted def to consult. A first attempt regressed (native names resolve for construction but the emitted duplicate defs made constructors ambiguous); with the defs filtered it is a clean win. Differential-tested: native Option/Result in a signature + construction + match all run correctly (Some(7)->7, None->99, Result Error->-1). Sweep: 1054 -> 1102 / 3900 (28.3%). This also unblocks general container marshalling — the daemon constructs native Option/Result that now match bridged return types. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 27 ++++++++++++++++++- .../Builtins.Compiler/Libs/Compiler.fs | 20 +++++++++++++- 2 files changed, 45 insertions(+), 2 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 7c0cc5c482..9701425747 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -75,6 +75,24 @@ let private allOk (results : List>) : Result, string let nameFor (hash : string) : string = "fn_" + hash let nameForType (hash : string) : string = "T_" + hash +// Dark's Option/Result are ordinary package types, but the compiler ships its OWN +// native Stdlib.Option.Option / Stdlib.Result.Result (its stdlib and the daemon's +// unmarshaller use them). Bridging Dark's versions to a distinct T_ splits +// Option/Result into two non-unifying types AND double-defines the Some/None/Ok/ +// Error constructors. So map both hashes to the native names everywhere and skip +// emitting a TypeDef for them (buildPieces filters via isNativeType). +let optionTypeHash : string = LibExecution.PackageRefs.Type.Stdlib.option () +let resultTypeHash : string = LibExecution.PackageRefs.Type.Stdlib.result () + +let isNativeType (h : string) : bool = h = optionTypeHash || h = resultTypeHash + +/// The compiler-side type name for a package type hash: the native Option/Result +/// for those two, else a T_. +let compilerTypeName (h : string) : string = + if h = optionTypeHash then "Stdlib.Option.Option" + elif h = resultTypeHash then "Stdlib.Result.Result" + else nameForType h + /// Pure-tier builtin migration (row 1 of the seam's dispatch table, see /// notes/compiler-merge/BUILTINS-ARCHITECTURE.md): a call to one of these /// main-repo builtins lowers to a call to the compiler's OWN native stdlib fn, @@ -201,6 +219,13 @@ let rec bridgeType | PT.TCustomType(nr, typeArgs) -> typeHash nr |> Result.bind (fun h -> + // Option/Result -> native compiler sum types, independent of the type env. + if isNativeType h then + typeArgs + |> List.map recurse + |> allOk + |> Result.map (fun args -> AST.TSum(compilerTypeName h, args)) + else match Map.tryFind h types with // Not in the type env => unfetched / unsupported: hard-fail cleanly. | None -> err "type" "TCustomType" @@ -471,7 +496,7 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = fields |> List.map recurse |> allOk - |> Result.map (fun fs -> AST.Constructor(nameForType h, caseName, tuplePayload fs))) + |> Result.map (fun fs -> AST.Constructor(compilerTypeName h, caseName, tuplePayload fs))) // Cross-fn calls: a direct call to a package fn lowers to AST.Call, or // AST.TypeApp when the call site carries type args (the compiler monomorphizes // it). The callee itself is bridged separately (the builtin walks the graph). diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index cb376c9d7c..5ae0ca7286 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -203,7 +203,12 @@ let private buildPieces let! typeClosure = fetchTypeClosure Set.empty [] typeSeeds match typeClosure with | Error e -> return Error e - | Ok types -> + | Ok typesRaw -> + // Option/Result are defined natively by the compiler stdlib and bridged to + // those native types (Bridge.isNativeType). Drop them from the fetched + // closure so we don't ALSO emit T_ defs — that would double-define + // Some/None/Ok/Error and make every use ambiguous. + let types = typesRaw |> List.filter (fun (h, _) -> not (Bridge.isNativeType h)) // The type env: non-generic record (false) / enum (true) types only. // Generic + alias types are omitted, so any fn using one hard-fails. // Records/enums emit a TypeDef and lower to a named TRecord/TSum. @@ -359,6 +364,19 @@ let rec private zeroValue |> allOk |> Result.map (fun fs -> AST.RecordLiteral(name, fs)) | _ -> Error $"no record def {name}" + // Native Option/Result have no emitted TypeDef (the compiler stdlib defines + // them), so synthesize their zeros directly: None for Option, Ok for + // Result (falling back to Error if the Ok type can't be zeroed). + | AST.TSum("Stdlib.Option.Option", _) -> + Ok(AST.Constructor("Stdlib.Option.Option", "None", None)) + | AST.TSum("Stdlib.Result.Result", args) -> + let okT = List.tryItem 0 args |> Option.defaultValue AST.TInt64 + let errT = List.tryItem 1 args |> Option.defaultValue AST.TString + match zeroValue defs seen okT with + | Ok v -> Ok(AST.Constructor("Stdlib.Result.Result", "Ok", Some v)) + | Error _ -> + zeroValue defs seen errT + |> Result.map (fun v -> AST.Constructor("Stdlib.Result.Result", "Error", Some v)) | AST.TSum(name, args) -> if Set.contains name seen then Error $"recursive type {name}" else From 153b40ad48838549b7bc42ef2a0e647e872b021f Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 11:54:30 -0400 Subject: [PATCH 109/172] compiler: general recursive container marshaller (Option/Result of any depth) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Replaces the fixed WireRet cases (Option, Result, …) with one composable, type-directed path now that Option/Result unify with the native compiler types: - Daemon dvalToWire is recursive and parent-escapes children (escWire), so nested values compose; Rpc.dark carries the matching escape/unescape codec. - Bridge.unmarshalTyped recursively decodes a wire response into any marshalable compiler type (scalars, Option, Result, and — code present, routing off — List); WireRet.WRTyped carries the bridged return type. - buildEffectfulMap routes a container return via rtToMarshalable (RT type -> marshalable AST.Type), so Option/Result of prims (any nesting) now marshal. - dispatchBuiltin wraps the builtin call in try/with: a raising builtin (e.g. a capability check) returns an error marker instead of leaving the compiled program polling the response file forever. PROVEN at runtime: compilerMarshalSelfTest compiles a program that calls the REAL environmentGet through the daemon, decodes its Option via unmarshalTyped, and withDefault-extracts it -> "/home/dark", matching the interpreter. List routing is OFF: the compiled list-decode path hangs at runtime (not yet root-caused; the unmarshalTyped TList code stays for when it's fixed). Sweep: 1102 -> 1105 / 3900 (28.3%). --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 106 ++++++++++------- .../Builtins.Compiler/Libs/Compiler.fs | 110 +++++++++++++++--- 2 files changed, 159 insertions(+), 57 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 9701425747..b1c8f9a285 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -45,10 +45,10 @@ type WireRet = | WRString | WRInt // Int64 | WRBool - | WROptString // Option - | WRResStrStr // Result - | WRResUnitStr // Result - | WRResIntStr // Result + /// Any container (Option/Result/List of marshalable types), decoded recursively + /// over the bridged return type. Replaces the old fixed Option/Result-of-String + /// cases with a general, composable path. + | WRTyped of AST.Type type BridgeCtx = { Params : string[] @@ -367,57 +367,75 @@ let rec private bindPattern |> Result.bind (fun inner -> bindPattern p (AST.TupleAccess(AST.Var tmp, i)) inner) build 0 subs |> Result.map (fun inner -> AST.Let(tmp, value, inner)) -/// Unmarshal a host-RPC wire response (an AST expr producing the String) back -/// into a native value, per the builtin's return wire type. Option/Result wire -/// format: "" or "\n" (case-prefix length: Some/Ok/Error). -let private unmarshalReturn (ret : WireRet) (call : AST.Expr) : AST.Expr = - let optT = "Stdlib.Option.Option" - let resT = "Stdlib.Result.Result" - let r = AST.Var "__rpc_r" +/// Whether a bridged return type can be recursively unmarshaled from the wire. +let rec isMarshalableType (t : AST.Type) : bool = + match t with + | AST.TString | AST.TInt64 | AST.TBool | AST.TUnit -> true + | AST.TSum("Stdlib.Option.Option", [ inner ]) -> isMarshalableType inner + | AST.TSum("Stdlib.Result.Result", [ a; b ]) -> isMarshalableType a && isMarshalableType b + | AST.TList inner -> isMarshalableType inner + | _ -> false + +/// Recursively decode a wire response (an AST String expr) into a native value of +/// compiler type `t`. Compound children were escaped by the daemon (escWire), so +/// each is unescaped before decoding. `d` keeps the let-bound temp unique per depth. +let rec unmarshalTyped (d : int) (t : AST.Type) (src : AST.Expr) : AST.Expr = + let rv = "__rpc_" + string d + let r = AST.Var rv let len e = AST.Call("Stdlib.String.length", AST.NonEmptyList.singleton e) - let slice e a b = - AST.Call("Stdlib.String.slice", AST.NonEmptyList.fromList [ e; a; b ]) - let starts e p = - AST.Call("Stdlib.String.startsWith", AST.NonEmptyList.fromList [ e; AST.StringLiteral p ]) + let slice e a b = AST.Call("Stdlib.String.slice", AST.NonEmptyList.fromList [ e; a; b ]) + let starts e p = AST.Call("Stdlib.String.startsWith", AST.NonEmptyList.fromList [ e; AST.StringLiteral p ]) + let unesc e = AST.Call("Stdlib.hostRpcUnescape", AST.NonEmptyList.singleton e) let parseInt e = AST.Call("Stdlib.hostRpcParseInt", AST.NonEmptyList.singleton e) - match ret with - | WRString -> call - | WRInt -> parseInt call - | WRBool -> - AST.Let("__rpc_r", call, AST.Call("Stdlib.String.equals", AST.NonEmptyList.fromList [ r; AST.StringLiteral "true" ])) - | WRUnit -> AST.Let("__rpc_ignore", call, AST.UnitLiteral) - | WROptString -> + let optT = "Stdlib.Option.Option" + let resT = "Stdlib.Result.Result" + match t with + | AST.TString -> src + | AST.TInt64 -> parseInt src + | AST.TBool -> AST.BinOp(AST.Eq, src, AST.StringLiteral "true") + | AST.TUnit -> AST.Let(rv, src, AST.UnitLiteral) + | AST.TSum("Stdlib.Option.Option", [ inner ]) -> AST.Let( - "__rpc_r", - call, + rv, + src, AST.If( starts r "Some\n", - AST.Constructor(optT, "Some", Some(slice r (AST.Int64Literal 5L) (len r))), + AST.Constructor(optT, "Some", Some(unmarshalTyped (d + 1) inner (unesc (slice r (AST.Int64Literal 5L) (len r))))), AST.Constructor(optT, "None", None))) - | WRResUnitStr -> + | AST.TSum("Stdlib.Result.Result", [ okT; errT ]) -> AST.Let( - "__rpc_r", - call, + rv, + src, AST.If( starts r "Error\n", - AST.Constructor(resT, "Error", Some(slice r (AST.Int64Literal 6L) (len r))), - AST.Constructor(resT, "Ok", Some AST.UnitLiteral))) - | WRResStrStr -> + AST.Constructor(resT, "Error", Some(unmarshalTyped (d + 1) errT (unesc (slice r (AST.Int64Literal 6L) (len r))))), + AST.Constructor(resT, "Ok", Some(unmarshalTyped (d + 1) okT (unesc (slice r (AST.Int64Literal 3L) (len r))))))) + | AST.TList inner -> + let ev = "__rpce_" + string d + let lam = + AST.Lambda( + AST.NonEmptyList.fromList [ (ev, AST.TString) ], + unmarshalTyped (d + 1) inner (unesc (AST.Var ev))) + let split = AST.Call("Stdlib.String.split", AST.NonEmptyList.fromList [ r; AST.StringLiteral "\n" ]) AST.Let( - "__rpc_r", - call, + rv, + src, AST.If( - starts r "Error\n", - AST.Constructor(resT, "Error", Some(slice r (AST.Int64Literal 6L) (len r))), - AST.Constructor(resT, "Ok", Some(slice r (AST.Int64Literal 3L) (len r))))) - | WRResIntStr -> - AST.Let( - "__rpc_r", - call, - AST.If( - starts r "Error\n", - AST.Constructor(resT, "Error", Some(slice r (AST.Int64Literal 6L) (len r))), - AST.Constructor(resT, "Ok", Some(parseInt (slice r (AST.Int64Literal 3L) (len r)))))) + AST.BinOp(AST.Eq, r, AST.StringLiteral ""), + AST.ListLiteral [], + AST.TypeApp("Stdlib.List.map", [ AST.TString; inner ], AST.NonEmptyList.fromList [ split; lam ]))) + | _ -> src // unreachable: buildEffectfulMap only routes isMarshalableType returns + +/// Unmarshal a host-RPC wire response into a native value per its return wire +/// type. Scalars are decoded inline; every container routes through the recursive +/// unmarshalTyped over the bridged return type. +let private unmarshalReturn (ret : WireRet) (call : AST.Expr) : AST.Expr = + match ret with + | WRString -> call + | WRInt -> AST.Call("Stdlib.hostRpcParseInt", AST.NonEmptyList.singleton call) + | WRBool -> AST.BinOp(AST.Eq, call, AST.StringLiteral "true") + | WRUnit -> AST.Let("__rpc_ignore", call, AST.UnitLiteral) + | WRTyped t -> unmarshalTyped 0 t call let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = let recurse = bridgeExpr ctx diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 5ae0ca7286..a856b6f70a 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -131,6 +131,39 @@ let rec private fetchValueClosure return! fetchValueClosure (Set.add h visited) (acc @ [ (h, pv) ]) (rest @ deps) } +/// A builtin's RUNTIME return type -> the marshalable compiler AST.Type it decodes +/// to, or None if it can't be recursively unmarshaled. Handles primitives and +/// Option/Result/List of marshalable types (Option/Result recognized by hash); +/// custom-enum payloads (which need the type-def env) return None. +let rec private rtToMarshalable (t : TypeReference) : AST.Type option = + match t with + | TString -> Some AST.TString + | TInt64 -> Some AST.TInt64 + | TInt -> Some AST.TInt64 + | TBool -> Some AST.TBool + | TUnit -> Some AST.TUnit + // TList is excluded pending a runtime hang in the compiled list-decode path + // (Option/Result are proven); the unmarshalTyped TList case stays for when it lands. + | TCustomType(nr, args) -> + match nr.resolved with + | Ok(FQTypeName.Package(Hash h)) -> + if h = Bridge.optionTypeHash then + match args with + | [ inner ] -> + rtToMarshalable inner + |> Option.map (fun a -> AST.TSum("Stdlib.Option.Option", [ a ])) + | _ -> None + elif h = Bridge.resultTypeHash then + match args with + | [ a; b ] -> + match rtToMarshalable a, rtToMarshalable b with + | Some ab, Some bb -> Some(AST.TSum("Stdlib.Result.Result", [ ab; bb ])) + | _ -> None + | _ -> None + else None + | _ -> None + | _ -> None + /// Fetch + bridge the whole graph (fns and their non-generic custom types), /// returning the compiler TypeDefs, FunctionDefs, and the root's compiled name. /// Effectful builtins routable through the host RPC seam, from the live runtime: @@ -139,10 +172,6 @@ let rec private fetchValueClosure let private buildEffectfulMap (exeState : ExecutionState) : Map = - let optStr = TypeReference.option TString - let resStrStr = TypeReference.result TString TString - let resUnitStr = TypeReference.result TUnit TString - let resIntStr = TypeReference.result TInt64 TString exeState.fns.builtIn |> Map.toList |> List.choose (fun (name, bfn) -> @@ -169,11 +198,13 @@ let private buildEffectfulMap | TBool -> Some Bridge.WRBool | TUuid -> Some Bridge.WRString | TDateTime -> Some Bridge.WRString - | t when t = optStr -> Some Bridge.WROptString - | t when t = resStrStr -> Some Bridge.WRResStrStr - | t when t = resUnitStr -> Some Bridge.WRResUnitStr - | t when t = resIntStr -> Some Bridge.WRResIntStr - | _ -> None + | other -> + // General container returns (Option/Result/List of marshalable types); + // the recursive unmarshaller decodes them. Custom-enum payloads (needing + // the type-def env) return None here and stay unrouted. + match rtToMarshalable other with + | Some bt -> Some(Bridge.WRTyped bt) + | None -> None match wireRet with | Some ret when not (List.exists Option.isNone argWires) -> Some(name.name, (argWires |> List.map Option.get, ret)) @@ -457,12 +488,19 @@ let private outcome (ok : bool) (detail : string) : Dval = /// Dval -> wire string. Scalars are literal; an enum (Option/Result) becomes /// "" (nullary) or "\n" (recursively marshaled). +/// Escape a child's encoding so a raw newline only ever separates children +/// (matches Stdlib.hostRpcEscape on the compiled side); composes to any depth. +let private escWire (s : string) : string = + s.Replace("\\", "\\\\").Replace("\n", "\\n") + let rec private dvalToWire (d : Dval) : string = match d with | DEnum(_, _, _, caseName, []) -> caseName - | DEnum(_, _, _, caseName, [ payload ]) -> caseName + "\n" + dvalToWire payload | DEnum(_, _, _, caseName, fields) -> - caseName + "\n" + (fields |> List.map dvalToWire |> String.concat "") + caseName + "\n" + (fields |> List.map (dvalToWire >> escWire) |> String.concat "\n") + | DList(_, xs) -> xs |> List.map (dvalToWire >> escWire) |> String.concat "\n" + | DTuple(a, b, rest) -> + (a :: b :: rest) |> List.map (dvalToWire >> escWire) |> String.concat "\n" | DString s -> s | DInt n -> string (DarkInt.toBigInt n) | DInt8 n -> string n @@ -516,8 +554,14 @@ let private dispatchBuiltin (fun (p : BuiltInParam) (a : string) -> wireToDval p.typ a) (List.truncate n bfn.parameters) (List.truncate n wireArgs) - let! result = bfn.fn (exeState, vm, [], dvalArgs) - return dvalToWire result + // A builtin that raises (e.g. a capability check, a bad arg) must still + // produce a response, or the compiled program polls the response file + // forever. Return an error marker instead of letting it propagate. + try + let! result = bfn.fn (exeState, vm, [], dvalArgs) + return dvalToWire result + with e -> + return $"ERR:exn:{e.Message}" } let private rpcReqFifo = "/tmp/dark-rpc-req" @@ -659,6 +703,46 @@ let fns () : List = capabilities = LibExecution.Capabilities.noCaps deprecated = NotDeprecated } + { name = fn "compilerMarshalSelfTest" 0 + typeParams = [] + parameters = [ Param.make "unit" TUnit "" ] + returnType = TString + description = + "Proves the general container marshaller round-trips at runtime: compiles a program that calls the REAL environmentGet builtin through the daemon (returns Option), decodes the wire response via Bridge.unmarshalTyped over Option, and Option.withDefault-extracts it. Returns the binary stdout (expect the value of $HOME)." + fn = + (function + | exeState, vm, _, [ DUnit ] -> + uply { + let daemon = serveOneRequest exeState vm + // Option: environmentGet "HOME" through the daemon -> decode -> withDefault + let optStrTy = AST.TSum("Stdlib.Option.Option", [ AST.TString ]) + let rpcCall = + AST.Call( + "Stdlib.hostRpc", + AST.NonEmptyList.singleton (AST.StringLiteral "environmentGet\nHOME")) + let decoded = Bridge.unmarshalTyped 0 optStrTy rpcCall + let program : AST.Program = + AST.Program + [ AST.Expression( + AST.TypeApp( + "Stdlib.Option.withDefault", + [ AST.TString ], + AST.NonEmptyList.fromList [ decoded; AST.StringLiteral "NONE" ])) ] + match compileAst program with + | Error e -> + daemon.Wait() + return DString $"compile-error: {e}" + | Ok binary -> + let out = CompilerLibrary.execute 0 binary + daemon.Wait() + return DString(out.Stdout.Trim()) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + { name = fn "compilerBridgeSelfTest" 0 typeParams = [] parameters = [ Param.make "unit" TUnit "" ] From 74a6cc667c38190804bfc3348c4c7885c13fcdf9 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 12:38:31 -0400 Subject: [PATCH 110/172] compiler: implement FileDelete (unlink) + opaque-handle model for complex values MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Two coupled fixes that unblock real list/complex-value integration: 1. FileDelete was a no-op STUB in x64 codegen (loadImm64 dest 0, path ignored). So Stdlib.File.delete did nothing, the host-RPC response file was never cleared, and any program making a SECOND rpc call read the stale first response. Now emits a real unlink(path) syscall (mirrors FileExists's path copy). This is the first change to the compiler's codegen — a genuine bug fix, and multi-call RPC (any fn calling several effectful builtins) now works. hostRpc also clears the response before issuing a request, belt-and-suspenders. 2. Opaque-handle model: the compiler can't build a multi-element list on x64 (the finger-tree DEEP-node runtime bug — see status memory), so complex values now live in a daemon-side handle table as REAL Dvals, and compiled code holds only an Int64 handle. dvalToWire stores a DList -> handle id; wireToDval resolves a List/Dict-typed arg from its handle. Every operation on the value routes back through the daemon to the real F# builtin — the "real builtin integration" path, no finger-tree involved. PROVEN end to end (compilerHandleSelfTest): a program calls the real stringSplit (-> List stored as handle 1), then passes that handle to the real listLength -> 3. The compiled code only ever touches strings/ints. No regressions: Option marshalling and the daemon self-test still green. --- .../Builtins.Compiler/Libs/Compiler.fs | 72 ++++++++++++++++++- .../src/LibCompiler/passes/x64/6_CodeGen.fs | 53 +++++++++++++- backend/src/LibCompiler/stdlib/Rpc.dark | 4 ++ 3 files changed, 124 insertions(+), 5 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index a856b6f70a..11f30183d6 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -486,19 +486,39 @@ let private outcome (ok : bool) (detail : string) : Dval = // v1 marshals scalars only; container types are TODO. (BUILTINS-ARCHITECTURE.md) // --------------------------------------------------------------------------- -/// Dval -> wire string. Scalars are literal; an enum (Option/Result) becomes -/// "" (nullary) or "\n" (recursively marshaled). +/// Opaque-handle table: complex values (List/Dict/…) the compiler can't represent +/// natively on x64 (the finger-tree DEEP-node runtime bug) live here as real Dvals; +/// compiled code holds only an Int64 handle and routes every operation on them back +/// through the daemon to the REAL builtins. Daemon requests are serviced on one +/// thread, so a plain Dictionary is safe. +let private handleTable = System.Collections.Generic.Dictionary() +let mutable private handleCounter = 0L + + +let private storeHandle (d : Dval) : int64 = + handleCounter <- handleCounter + 1L + handleTable[handleCounter] <- d + handleCounter + +let private getHandle (id : int64) : Dval option = + match handleTable.TryGetValue id with + | true, d -> Some d + | _ -> None + /// Escape a child's encoding so a raw newline only ever separates children /// (matches Stdlib.hostRpcEscape on the compiled side); composes to any depth. let private escWire (s : string) : string = s.Replace("\\", "\\\\").Replace("\n", "\\n") +/// Dval -> wire string. Scalars are literal; enums (Option/Result) recurse; a +/// list becomes an opaque handle id (see handleTable) since the compiler can't +/// build a native multi-element list on x64. let rec private dvalToWire (d : Dval) : string = match d with | DEnum(_, _, _, caseName, []) -> caseName | DEnum(_, _, _, caseName, fields) -> caseName + "\n" + (fields |> List.map (dvalToWire >> escWire) |> String.concat "\n") - | DList(_, xs) -> xs |> List.map (dvalToWire >> escWire) |> String.concat "\n" + | DList _ -> string (storeHandle d) | DTuple(a, b, rest) -> (a :: b :: rest) |> List.map (dvalToWire >> escWire) |> String.concat "\n" | DString s -> s @@ -532,6 +552,15 @@ let private wireToDval (t : TypeReference) (s : string) : Dval = | TFloat -> DFloat(float s) | TChar -> DChar s | TUuid -> DUuid(System.Guid.Parse s) + // A list/dict arg arrives as an opaque handle id -> resolve to the real Dval. + | TList _ + | TDict _ -> + match System.Int64.TryParse s with + | true, id -> + match getHandle id with + | Some d -> d + | None -> DString s + | _ -> DString s | _ -> DString s /// Dispatch one request ("name\narg1\narg2…") to the real builtin, return the @@ -790,6 +819,43 @@ let fns () : List = capabilities = LibExecution.Capabilities.noCaps deprecated = NotDeprecated } + { name = fn "compilerHandleSelfTest" 0 + typeParams = [] + parameters = [ Param.make "unit" TUnit "" ] + returnType = TString + description = + "Proves the opaque-handle model end to end: compiles a program that (1) calls the REAL stringSplit builtin through the daemon (returns a List -> stored as a handle id), then (2) passes that handle to the REAL listLength builtin. The compiled code only ever touches strings/ints (no native finger-tree), yet a list flows between two builtins via the daemon. Returns stdout (expect 3)." + fn = + (function + | exeState, vm, _, [ DUnit ] -> + uply { + let (daemon, shutdown) = startDaemon exeState vm + // let h = hostRpc("stringSplit\na,b,c\n,") in hostRpc("listLength\n" ++ h) + let rpc req = AST.Call("Stdlib.hostRpc", AST.NonEmptyList.singleton req) + let program : AST.Program = + AST.Program + [ AST.Expression( + AST.Let( + "h", + rpc (AST.StringLiteral "stringSplit\na,b,c\n,"), + rpc (AST.BinOp(AST.StringConcat, AST.StringLiteral "listLength\n", AST.Var "h")))) ] + match compileAst program with + | Error e -> + shutdown () + daemon.Wait() + return DString $"compile-error: {e}" + | Ok binary -> + let out = CompilerLibrary.execute 0 binary + shutdown () + daemon.Wait() + return DString(out.Stdout.Trim()) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + { name = fn "compileFnByHash" 0 typeParams = [] parameters = diff --git a/backend/src/LibCompiler/passes/x64/6_CodeGen.fs b/backend/src/LibCompiler/passes/x64/6_CodeGen.fs index e1c7072d61..66dd3bd644 100644 --- a/backend/src/LibCompiler/passes/x64/6_CodeGen.fs +++ b/backend/src/LibCompiler/passes/x64/6_CodeGen.fs @@ -2871,9 +2871,58 @@ let private translateInstr (ctx: FuncCtx) (instr: LIR.Instr) : Result + | LIR.FileDelete (dest, path) -> + // Real unlink(path) syscall (was a no-op stub). Copies the heap string to + // a null-terminated stack buffer (same as FileExists) then unlinks it. resolveReg dest - |> Result.map (fun destReg -> loadImm64 destReg 0L) + |> Result.bind (fun destReg -> + let resolvePathToR10 = + match path with + | LIR.Reg reg -> + resolveReg reg |> Result.map (fun srcReg -> + if srcReg = X86_64.R10 then [] else [X86_64.MOV_reg (X86_64.R10, srcReg)]) + | LIR.StackSlot offset -> + Ok [X86_64.MOV_load (X86_64.R10, X86_64.RBP, int32 (adjustStackOffset ctx offset))] + | LIR.StringSymbol value -> + Ok (emitStringLiteralNoRefCount X86_64.R10 value) + | _ -> Ok (loadImm64 X86_64.R10 0L) + let copyLabel = freshLabel "fd_copy" + let doneLabel = freshLabel "fd_done" + resolvePathToR10 |> Result.map (fun pathSetup -> + let unlinkSyscall = int64 syscalls.Unlink + let saves = [X86_64.PUSH X86_64.RDI; X86_64.PUSH X86_64.RSI; X86_64.PUSH X86_64.RCX; X86_64.PUSH X86_64.R10] + let restores = [X86_64.POP X86_64.R10; X86_64.POP X86_64.RCX; X86_64.POP X86_64.RSI; X86_64.POP X86_64.RDI] + pathSetup @ saves + @ [X86_64.SUB_imm (X86_64.RSP, 4096)] + @ [X86_64.MOV_load (X86_64.RCX, X86_64.R10, 0) + X86_64.LEA (X86_64.RSI, X86_64.R10, 8) + X86_64.MOV_reg (X86_64.RDI, X86_64.RSP)] + @ loadImm64 X86_64.R10 0L + @ [X86_64.Label copyLabel + X86_64.CMP_reg (X86_64.R10, X86_64.RCX) + X86_64.Jcc (X86_64.GE, doneLabel) + X86_64.MOV_reg (scratch, X86_64.RSI) + X86_64.ADD_reg (scratch, X86_64.R10) + X86_64.MOV_load_byte (scratch, scratch, 0) + X86_64.PUSH X86_64.R8 + X86_64.MOV_reg (X86_64.R8, X86_64.RDI) + X86_64.ADD_reg (X86_64.R8, X86_64.R10) + X86_64.MOV_store_byte (X86_64.R8, 0, scratch) + X86_64.POP X86_64.R8 + X86_64.ADD_imm (X86_64.R10, 1) + X86_64.JMP copyLabel + X86_64.Label doneLabel] + @ [X86_64.MOV_reg (scratch, X86_64.RDI) + X86_64.ADD_reg (scratch, X86_64.RCX)] + @ loadImm64 X86_64.R10 0L + @ [X86_64.MOV_store_byte (scratch, 0, X86_64.R10)] + // syscall: unlink(path=RSP) + @ [X86_64.MOV_reg (X86_64.RDI, X86_64.RSP)] + @ loadImm64 X86_64.RAX unlinkSyscall + @ [X86_64.SYSCALL + X86_64.ADD_imm (X86_64.RSP, 4096)] + @ restores + @ loadImm64 destReg 0L)) | LIR.FileSetExecutable (dest, _) -> resolveReg dest diff --git a/backend/src/LibCompiler/stdlib/Rpc.dark b/backend/src/LibCompiler/stdlib/Rpc.dark index 7615907153..80f1977e5f 100644 --- a/backend/src/LibCompiler/stdlib/Rpc.dark +++ b/backend/src/LibCompiler/stdlib/Rpc.dark @@ -15,6 +15,10 @@ def Stdlib.hostRpcPoll(u: Unit) : String = Stdlib.hostRpcPoll(()) def Stdlib.hostRpc(request: String) : String = + // Clear any stale response BEFORE issuing the request, so a multi-call program + // can't read the previous call's response (the daemon writes the fresh one only + // after it reads this request). + let _ = Stdlib.File.delete("/tmp/dark-rpc-resp") in let _ = Stdlib.File.writeText("/tmp/dark-rpc-req", request) in Stdlib.hostRpcPoll(()) From b6d79585f74310499af91faf7d3e81ec2d944d95 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 13:18:56 -0400 Subject: [PATCH 111/172] compiler: daemon-side list primitives (build/walk lists via handles) Adds the handle-based list ops the bridge integration will lower to, so compiled code can construct AND traverse multi-element lists without ever touching the (x64-broken) native finger-tree: __listEmpty, __listConsStr, __listLen, __listIsEmpty, __listHeadStr, __listTail. Each manipulates the real Dval list in the daemon handle table and returns a handle id or a scalar. Intercepted in dispatchBuiltin ahead of the builtin lookup (no real builtin is named __list*). PROVEN (compilerListHandleSelfTest): the compiled program conses [a,b,c] through the daemon then __listLen -> 3, holding only String/Int handles throughout. This is the construction/traversal half of routing EList/EMatch/list-builtins through handles; the bridge lowering lands next. --- .../Builtins.Compiler/Libs/Compiler.fs | 80 +++++++++++++++++++ 1 file changed, 80 insertions(+) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 11f30183d6..1ba61898a5 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -574,6 +574,46 @@ let private dispatchBuiltin let parts = request.Split('\n') let name = parts[0] let wireArgs = parts[1..] |> Array.toList + // Handle-based list primitives: build/walk a real Dval list held in the daemon, + // so compiled code can work with multi-element lists (which the native x64 + // finger-tree can't) without ever constructing one. Element payloads are + // String for now (the common case); typed elements come later. + let listOf (hStr : string) : List option = + match System.Int64.TryParse hStr with + | true, id -> + match getHandle id with + | Some(DList(_, xs)) -> Some xs + | _ -> None + | _ -> None + let tryPrimitive () : string option = + match name, wireArgs with + | "__listEmpty", _ -> Some(string (storeHandle (DList(ValueType.Unknown, [])))) + | "__listConsStr", [ h; elem ] -> + listOf h + |> Option.map (fun xs -> + string (storeHandle (DList(ValueType.Unknown, DString elem :: xs)))) + | "__listLen", [ h ] -> listOf h |> Option.map (List.length >> string) + | "__listIsEmpty", [ h ] -> + listOf h |> Option.map (fun xs -> if List.isEmpty xs then "true" else "false") + | "__listHeadStr", [ h ] -> + listOf h + |> Option.map (fun xs -> + match xs with + | DString s :: _ -> s + | d :: _ -> dvalToWire d + | [] -> "") + | "__listTail", [ h ] -> + listOf h + |> Option.map (fun xs -> + let t = + match xs with + | _ :: t -> t + | [] -> [] + string (storeHandle (DList(ValueType.Unknown, t)))) + | _ -> None + match tryPrimitive () with + | Some resp -> return resp + | None -> match Map.tryFind (FQFnName.builtin name 0) exeState.fns.builtIn with | None -> return $"ERR:no-builtin:{name}" | Some bfn -> @@ -856,6 +896,46 @@ let fns () : List = capabilities = LibExecution.Capabilities.noCaps deprecated = NotDeprecated } + { name = fn "compilerListHandleSelfTest" 0 + typeParams = [] + parameters = [ Param.make "unit" TUnit "" ] + returnType = TString + description = + "Proves the compiled side can BUILD and query a multi-element list via handles (the native x64 finger-tree cannot): conses [a,b,c] through the daemon (__listEmpty/__listConsStr) then __listLen -> 3. Every value the compiled code holds is a String/Int handle." + fn = + (function + | exeState, vm, _, [ DUnit ] -> + uply { + let (daemon, shutdown) = startDaemon exeState vm + let rpc req = AST.Call("Stdlib.hostRpc", AST.NonEmptyList.singleton req) + let cat a b = AST.BinOp(AST.StringConcat, a, b) + let consReq hVar elem = + cat (cat (AST.StringLiteral "__listConsStr\n") (AST.Var hVar)) (AST.StringLiteral ("\n" + elem)) + let program : AST.Program = + AST.Program + [ AST.Expression( + AST.Let("h0", rpc (AST.StringLiteral "__listEmpty"), + AST.Let("h1", rpc (consReq "h0" "c"), + AST.Let("h2", rpc (consReq "h1" "b"), + AST.Let("h3", rpc (consReq "h2" "a"), + rpc (cat (AST.StringLiteral "__listLen\n") (AST.Var "h3"))))))) ] + match compileAst program with + | Error e -> + shutdown () + daemon.Wait() + return DString $"compile-error: {e}" + | Ok binary -> + let out = CompilerLibrary.execute 0 binary + shutdown () + daemon.Wait() + return DString(out.Stdout.Trim()) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + { name = fn "compileFnByHash" 0 typeParams = [] parameters = From 6652f842bae72b756e582867f7adf2d0877102bd Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 13:22:35 -0400 Subject: [PATCH 112/172] compiler: typed-element cons for handle lists (__listCons with type tag) __listCons decodes the wire element per its tag (i/b/f/s) before prepending, so lists of Int/Bool/Float build correctly via handles, not just String. Completes the daemon-side handle machinery the bridge lowering will target. List-handle self-test still green. --- .../src/Builtins/Builtins.Compiler/Libs/Compiler.fs | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 1ba61898a5..0d92989997 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -592,6 +592,18 @@ let private dispatchBuiltin listOf h |> Option.map (fun xs -> string (storeHandle (DList(ValueType.Unknown, DString elem :: xs)))) + // Typed cons: prepend a wire element decoded per its type tag, so lists of + // Int/Bool/Float (not just String) build correctly via handles. + | "__listCons", [ h; tag; elem ] -> + listOf h + |> Option.map (fun xs -> + let dv = + match tag with + | "i" -> DInt64(int64 elem) + | "b" -> DBool(elem = "true") + | "f" -> DFloat(float elem) + | _ -> DString elem + string (storeHandle (DList(ValueType.Unknown, dv :: xs)))) | "__listLen", [ h ] -> listOf h |> Option.map (List.length >> string) | "__listIsEmpty", [ h ] -> listOf h |> Option.map (fun xs -> if List.isEmpty xs then "true" else "false") From e4ae322d8a9ffc51eed4d112c3f6ce8f2accb56e Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 13:31:05 -0400 Subject: [PATCH 113/172] compiler: route int-width + float builtins to the native stdlib (1105 -> 1210) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Adds 71 pure-builtin mappings for Int8/Int16/Int32 and UInt8/16/32/64 — the comparison (lessThan/greaterThan/±OrEqualTo), arithmetic (add/sub/mul/div/mod), and toString ops — plus floatMultiply, each to its confirmed compiler-stdlib equivalent (main `Subtract/Multiply/Divide` map to `sub/mul/div`). These are plain integer/float ops, not the finger-tree, so they run correctly on x64; the type checker rejects any signature mismatch. Same mechanical pattern as the already-tested Int64 entries (differential-test a width sample before trusting for execution). Sweep: 1105 -> 1210 / 3900 (31.0%). unwrap (78), the int/float *conversions* (intToFloat etc., which need a Float parser), and Int128/UInt128 (no compiler stdlib) remain. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 81 ++++++++++++++++++- 1 file changed, 80 insertions(+), 1 deletion(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index b1c8f9a285..b5bd9e96e1 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -167,7 +167,86 @@ let builtinToStdlib : Map = "resultWithDefault", "Stdlib.Result.withDefault" "resultAndThen", "Stdlib.Result.andThen" "resultIsOk", "Stdlib.Result.isOk" - "resultIsError", "Stdlib.Result.isError" ] + "resultIsError", "Stdlib.Result.isError" + // Int8 + "int8LessThan", "Stdlib.Int8.lessThan" + "int8GreaterThan", "Stdlib.Int8.greaterThan" + "int8GreaterThanOrEqualTo", "Stdlib.Int8.greaterThanOrEqualTo" + "int8LessThanOrEqualTo", "Stdlib.Int8.lessThanOrEqualTo" + "int8ToString", "Stdlib.Int8.toString" + "int8Add", "Stdlib.Int8.add" + "int8Subtract", "Stdlib.Int8.sub" + "int8Multiply", "Stdlib.Int8.mul" + "int8Divide", "Stdlib.Int8.div" + "int8Mod", "Stdlib.Int8.mod" + // Int16 + "int16LessThan", "Stdlib.Int16.lessThan" + "int16GreaterThan", "Stdlib.Int16.greaterThan" + "int16GreaterThanOrEqualTo", "Stdlib.Int16.greaterThanOrEqualTo" + "int16LessThanOrEqualTo", "Stdlib.Int16.lessThanOrEqualTo" + "int16ToString", "Stdlib.Int16.toString" + "int16Add", "Stdlib.Int16.add" + "int16Subtract", "Stdlib.Int16.sub" + "int16Multiply", "Stdlib.Int16.mul" + "int16Divide", "Stdlib.Int16.div" + "int16Mod", "Stdlib.Int16.mod" + // Int32 + "int32LessThan", "Stdlib.Int32.lessThan" + "int32GreaterThan", "Stdlib.Int32.greaterThan" + "int32GreaterThanOrEqualTo", "Stdlib.Int32.greaterThanOrEqualTo" + "int32LessThanOrEqualTo", "Stdlib.Int32.lessThanOrEqualTo" + "int32ToString", "Stdlib.Int32.toString" + "int32Add", "Stdlib.Int32.add" + "int32Subtract", "Stdlib.Int32.sub" + "int32Multiply", "Stdlib.Int32.mul" + "int32Divide", "Stdlib.Int32.div" + "int32Mod", "Stdlib.Int32.mod" + // UInt8 + "uint8LessThan", "Stdlib.UInt8.lessThan" + "uint8GreaterThan", "Stdlib.UInt8.greaterThan" + "uint8GreaterThanOrEqualTo", "Stdlib.UInt8.greaterThanOrEqualTo" + "uint8LessThanOrEqualTo", "Stdlib.UInt8.lessThanOrEqualTo" + "uint8ToString", "Stdlib.UInt8.toString" + "uint8Add", "Stdlib.UInt8.add" + "uint8Subtract", "Stdlib.UInt8.sub" + "uint8Multiply", "Stdlib.UInt8.mul" + "uint8Divide", "Stdlib.UInt8.div" + "uint8Mod", "Stdlib.UInt8.mod" + // UInt16 + "uint16LessThan", "Stdlib.UInt16.lessThan" + "uint16GreaterThan", "Stdlib.UInt16.greaterThan" + "uint16GreaterThanOrEqualTo", "Stdlib.UInt16.greaterThanOrEqualTo" + "uint16LessThanOrEqualTo", "Stdlib.UInt16.lessThanOrEqualTo" + "uint16ToString", "Stdlib.UInt16.toString" + "uint16Add", "Stdlib.UInt16.add" + "uint16Subtract", "Stdlib.UInt16.sub" + "uint16Multiply", "Stdlib.UInt16.mul" + "uint16Divide", "Stdlib.UInt16.div" + "uint16Mod", "Stdlib.UInt16.mod" + // UInt32 + "uint32LessThan", "Stdlib.UInt32.lessThan" + "uint32GreaterThan", "Stdlib.UInt32.greaterThan" + "uint32GreaterThanOrEqualTo", "Stdlib.UInt32.greaterThanOrEqualTo" + "uint32LessThanOrEqualTo", "Stdlib.UInt32.lessThanOrEqualTo" + "uint32ToString", "Stdlib.UInt32.toString" + "uint32Add", "Stdlib.UInt32.add" + "uint32Subtract", "Stdlib.UInt32.sub" + "uint32Multiply", "Stdlib.UInt32.mul" + "uint32Divide", "Stdlib.UInt32.div" + "uint32Mod", "Stdlib.UInt32.mod" + // UInt64 + "uint64LessThan", "Stdlib.UInt64.lessThan" + "uint64GreaterThan", "Stdlib.UInt64.greaterThan" + "uint64GreaterThanOrEqualTo", "Stdlib.UInt64.greaterThanOrEqualTo" + "uint64LessThanOrEqualTo", "Stdlib.UInt64.lessThanOrEqualTo" + "uint64ToString", "Stdlib.UInt64.toString" + "uint64Add", "Stdlib.UInt64.add" + "uint64Subtract", "Stdlib.UInt64.sub" + "uint64Multiply", "Stdlib.UInt64.mul" + "uint64Divide", "Stdlib.UInt64.div" + "uint64Mod", "Stdlib.UInt64.mod" + // Float + "floatMultiply", "Stdlib.Float.multiply" ] /// The package-type hash a type-name resolution points at. let private typeHash From d9cc8a64eaa30259b04b573aef2a6b6030fd0917 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 13:36:37 -0400 Subject: [PATCH 114/172] =?UTF-8?q?compiler:=20extend=20native-stdlib=20ro?= =?UTF-8?q?uting=20=E2=80=94=20full=20Int64,=20bitwise/shift,=20Char,=20Bo?= =?UTF-8?q?ol=20(1210=20->=201267)?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Completes the pure-op mappings to the compiler's native stdlib: the full Int64 op set (the first batch skipped it), the bitwise/shift/power/negate/clamp/max/min/ isEven/isOdd ops across all eight int widths, all Char ops (toString/case/ ascii-code/is-*), and boolToString. All plain scalar ops (not the finger-tree), type-checked against the stdlib signatures. Sweep: 1210 -> 1267 / 3900 (32.5%). Remaining unsupported-builtin is now the hard tail: unwrap (generic), int/float conversions (need a Float parser), JSON, blob, package-manager record returns, and the effectful posix/cli set. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 145 +++++++++++++++++- 1 file changed, 144 insertions(+), 1 deletion(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index b5bd9e96e1..e6e56bd500 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -246,7 +246,150 @@ let builtinToStdlib : Map = "uint64Divide", "Stdlib.UInt64.div" "uint64Mod", "Stdlib.UInt64.mod" // Float - "floatMultiply", "Stdlib.Float.multiply" ] + "floatMultiply", "Stdlib.Float.multiply" + // Int64 (full) + "int64LessThan", "Stdlib.Int64.lessThan" + "int64GreaterThan", "Stdlib.Int64.greaterThan" + "int64GreaterThanOrEqualTo", "Stdlib.Int64.greaterThanOrEqualTo" + "int64LessThanOrEqualTo", "Stdlib.Int64.lessThanOrEqualTo" + "int64ToString", "Stdlib.Int64.toString" + "int64Add", "Stdlib.Int64.add" + "int64Subtract", "Stdlib.Int64.sub" + "int64Multiply", "Stdlib.Int64.mul" + "int64Divide", "Stdlib.Int64.div" + "int64Mod", "Stdlib.Int64.mod" + "int64Power", "Stdlib.Int64.power" + "int64Negate", "Stdlib.Int64.negate" + "int64AbsoluteValue", "Stdlib.Int64.absoluteValue" + "int64Max", "Stdlib.Int64.max" + "int64Min", "Stdlib.Int64.min" + "int64Clamp", "Stdlib.Int64.clamp" + "int64BitwiseAnd", "Stdlib.Int64.bitwiseAnd" + "int64BitwiseOr", "Stdlib.Int64.bitwiseOr" + "int64BitwiseXor", "Stdlib.Int64.bitwiseXor" + "int64BitwiseNot", "Stdlib.Int64.bitwiseNot" + "int64ShiftLeft", "Stdlib.Int64.shiftLeft" + "int64ShiftRight", "Stdlib.Int64.shiftRight" + "int64IsEven", "Stdlib.Int64.isEven" + "int64IsOdd", "Stdlib.Int64.isOdd" + // Int8 (extra ops) + "int8Power", "Stdlib.Int8.power" + "int8Negate", "Stdlib.Int8.negate" + "int8AbsoluteValue", "Stdlib.Int8.absoluteValue" + "int8Max", "Stdlib.Int8.max" + "int8Min", "Stdlib.Int8.min" + "int8Clamp", "Stdlib.Int8.clamp" + "int8BitwiseAnd", "Stdlib.Int8.bitwiseAnd" + "int8BitwiseOr", "Stdlib.Int8.bitwiseOr" + "int8BitwiseXor", "Stdlib.Int8.bitwiseXor" + "int8BitwiseNot", "Stdlib.Int8.bitwiseNot" + "int8ShiftLeft", "Stdlib.Int8.shiftLeft" + "int8ShiftRight", "Stdlib.Int8.shiftRight" + "int8IsEven", "Stdlib.Int8.isEven" + "int8IsOdd", "Stdlib.Int8.isOdd" + // Int16 (extra ops) + "int16Power", "Stdlib.Int16.power" + "int16Negate", "Stdlib.Int16.negate" + "int16AbsoluteValue", "Stdlib.Int16.absoluteValue" + "int16Max", "Stdlib.Int16.max" + "int16Min", "Stdlib.Int16.min" + "int16Clamp", "Stdlib.Int16.clamp" + "int16BitwiseAnd", "Stdlib.Int16.bitwiseAnd" + "int16BitwiseOr", "Stdlib.Int16.bitwiseOr" + "int16BitwiseXor", "Stdlib.Int16.bitwiseXor" + "int16BitwiseNot", "Stdlib.Int16.bitwiseNot" + "int16ShiftLeft", "Stdlib.Int16.shiftLeft" + "int16ShiftRight", "Stdlib.Int16.shiftRight" + "int16IsEven", "Stdlib.Int16.isEven" + "int16IsOdd", "Stdlib.Int16.isOdd" + // Int32 (extra ops) + "int32Power", "Stdlib.Int32.power" + "int32Negate", "Stdlib.Int32.negate" + "int32AbsoluteValue", "Stdlib.Int32.absoluteValue" + "int32Max", "Stdlib.Int32.max" + "int32Min", "Stdlib.Int32.min" + "int32Clamp", "Stdlib.Int32.clamp" + "int32BitwiseAnd", "Stdlib.Int32.bitwiseAnd" + "int32BitwiseOr", "Stdlib.Int32.bitwiseOr" + "int32BitwiseXor", "Stdlib.Int32.bitwiseXor" + "int32BitwiseNot", "Stdlib.Int32.bitwiseNot" + "int32ShiftLeft", "Stdlib.Int32.shiftLeft" + "int32ShiftRight", "Stdlib.Int32.shiftRight" + "int32IsEven", "Stdlib.Int32.isEven" + "int32IsOdd", "Stdlib.Int32.isOdd" + // UInt8 (extra ops) + "uint8Power", "Stdlib.UInt8.power" + "uint8Negate", "Stdlib.UInt8.negate" + "uint8AbsoluteValue", "Stdlib.UInt8.absoluteValue" + "uint8Max", "Stdlib.UInt8.max" + "uint8Min", "Stdlib.UInt8.min" + "uint8Clamp", "Stdlib.UInt8.clamp" + "uint8BitwiseAnd", "Stdlib.UInt8.bitwiseAnd" + "uint8BitwiseOr", "Stdlib.UInt8.bitwiseOr" + "uint8BitwiseXor", "Stdlib.UInt8.bitwiseXor" + "uint8BitwiseNot", "Stdlib.UInt8.bitwiseNot" + "uint8ShiftLeft", "Stdlib.UInt8.shiftLeft" + "uint8ShiftRight", "Stdlib.UInt8.shiftRight" + "uint8IsEven", "Stdlib.UInt8.isEven" + "uint8IsOdd", "Stdlib.UInt8.isOdd" + // UInt16 (extra ops) + "uint16Power", "Stdlib.UInt16.power" + "uint16Negate", "Stdlib.UInt16.negate" + "uint16AbsoluteValue", "Stdlib.UInt16.absoluteValue" + "uint16Max", "Stdlib.UInt16.max" + "uint16Min", "Stdlib.UInt16.min" + "uint16Clamp", "Stdlib.UInt16.clamp" + "uint16BitwiseAnd", "Stdlib.UInt16.bitwiseAnd" + "uint16BitwiseOr", "Stdlib.UInt16.bitwiseOr" + "uint16BitwiseXor", "Stdlib.UInt16.bitwiseXor" + "uint16BitwiseNot", "Stdlib.UInt16.bitwiseNot" + "uint16ShiftLeft", "Stdlib.UInt16.shiftLeft" + "uint16ShiftRight", "Stdlib.UInt16.shiftRight" + "uint16IsEven", "Stdlib.UInt16.isEven" + "uint16IsOdd", "Stdlib.UInt16.isOdd" + // UInt32 (extra ops) + "uint32Power", "Stdlib.UInt32.power" + "uint32Negate", "Stdlib.UInt32.negate" + "uint32AbsoluteValue", "Stdlib.UInt32.absoluteValue" + "uint32Max", "Stdlib.UInt32.max" + "uint32Min", "Stdlib.UInt32.min" + "uint32Clamp", "Stdlib.UInt32.clamp" + "uint32BitwiseAnd", "Stdlib.UInt32.bitwiseAnd" + "uint32BitwiseOr", "Stdlib.UInt32.bitwiseOr" + "uint32BitwiseXor", "Stdlib.UInt32.bitwiseXor" + "uint32BitwiseNot", "Stdlib.UInt32.bitwiseNot" + "uint32ShiftLeft", "Stdlib.UInt32.shiftLeft" + "uint32ShiftRight", "Stdlib.UInt32.shiftRight" + "uint32IsEven", "Stdlib.UInt32.isEven" + "uint32IsOdd", "Stdlib.UInt32.isOdd" + // UInt64 (extra ops) + "uint64Power", "Stdlib.UInt64.power" + "uint64Negate", "Stdlib.UInt64.negate" + "uint64AbsoluteValue", "Stdlib.UInt64.absoluteValue" + "uint64Max", "Stdlib.UInt64.max" + "uint64Min", "Stdlib.UInt64.min" + "uint64Clamp", "Stdlib.UInt64.clamp" + "uint64BitwiseAnd", "Stdlib.UInt64.bitwiseAnd" + "uint64BitwiseOr", "Stdlib.UInt64.bitwiseOr" + "uint64BitwiseXor", "Stdlib.UInt64.bitwiseXor" + "uint64BitwiseNot", "Stdlib.UInt64.bitwiseNot" + "uint64ShiftLeft", "Stdlib.UInt64.shiftLeft" + "uint64ShiftRight", "Stdlib.UInt64.shiftRight" + "uint64IsEven", "Stdlib.UInt64.isEven" + "uint64IsOdd", "Stdlib.UInt64.isOdd" + // Char + "charToString", "Stdlib.Char.toString" + "charToLowercase", "Stdlib.Char.toLowercase" + "charToUppercase", "Stdlib.Char.toUppercase" + "charToAsciiCode", "Stdlib.Char.toCode" + "charFromAsciiCode", "Stdlib.Char.fromCode" + "charIsDigit", "Stdlib.Char.isDigit" + "charIsLetter", "Stdlib.Char.isLetter" + "charIsWhitespace", "Stdlib.Char.isWhitespace" + "charIsAlphanumeric", "Stdlib.Char.isAlphanumeric" + "charIsLowercase", "Stdlib.Char.isLowercase" + "charIsUppercase", "Stdlib.Char.isUppercase" + "boolToString", "Stdlib.Bool.toString" ] /// The package-type hash a type-name resolution points at. let private typeHash From f37903ed6185c4f12ef1fd09817c4b8502b0afbb Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 13:41:35 -0400 Subject: [PATCH 115/172] compiler: route Unit-arg effectful builtins through the seam (1267 -> 1308) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit A Unit parameter carries no data but wasn't wireable, so effectful builtins like directoryCurrent/dateTimeNow/timeNowMs/stdinReadLine (unit -> …) fell through to unsupported-builtin. WireArg gains WAUnit — the arg evaluates for effect and is sent as the literal "unit"; the daemon's wireToDval already maps TUnit -> DUnit. Sweep: 1267 -> 1308 / 3900 (33.5%). Session total 769 -> 1308 (+539). --- backend/src/Builtins/Builtins.Compiler/Bridge.fs | 4 +++- backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs | 1 + 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index e6e56bd500..1f723dd036 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -38,6 +38,7 @@ type WireArg = | WAInt | WABool | WAFloat + | WAUnit // a Unit param carries no data; sent as the literal "unit" /// How a builtin's wire response is unmarshaled back into a native value. type WireRet = @@ -776,7 +777,8 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = | WAString -> a | WAInt -> AST.Call("Stdlib.Int64.toString", AST.NonEmptyList.singleton a) | WABool -> AST.Call("Stdlib.Bool.toString", AST.NonEmptyList.singleton a) - | WAFloat -> AST.Call("Stdlib.Float.toString", AST.NonEmptyList.singleton a)) + | WAFloat -> AST.Call("Stdlib.Float.toString", AST.NonEmptyList.singleton a) + | WAUnit -> AST.Let("__rpc_unit", a, AST.StringLiteral "unit")) argWires bas let request = diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 0d92989997..2891903f99 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -184,6 +184,7 @@ let private buildEffectfulMap | TInt -> Some Bridge.WAInt | TBool -> Some Bridge.WABool | TFloat -> Some Bridge.WAFloat + | TUnit -> Some Bridge.WAUnit // Host-opaque types travel as their canonical string (see bridgeType). // Uuid round-trips cleanly (Guid parse); DateTime args are omitted until // wire->DateTime ISO parsing is in (return-only for now). From 029f1ce884963920547e1ba33a543354b762a41f Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 13:44:40 -0400 Subject: [PATCH 116/172] compiler: route Char-arg builtins through the seam (1308 -> 1314) A Char is a single grapheme; send it as a string (the daemon's wireToDval maps TChar -> DChar). Sweep 1308 -> 1314 / 3900 (33.7%). --- backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs | 1 + 1 file changed, 1 insertion(+) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 2891903f99..d9ad0d656d 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -185,6 +185,7 @@ let private buildEffectfulMap | TBool -> Some Bridge.WABool | TFloat -> Some Bridge.WAFloat | TUnit -> Some Bridge.WAUnit + | TChar -> Some Bridge.WAString // a Char is a single grapheme, sent as a string // Host-opaque types travel as their canonical string (see bridgeType). // Uuid round-trips cleanly (Guid parse); DateTime args are omitted until // wire->DateTime ISO parsing is in (return-only for now). From 5853a434269ed8fe85d9881fcb6a5b43124200de Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 13:51:27 -0400 Subject: [PATCH 117/172] compiler: runnable-vs-compilable sweep (compile + RUN each fn, with timeout) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit execute now takes a timeoutMs and kills a hung binary (exit -999, "TIMEOUT") — essential since multi-element-list fns hang on x64. New Builtin.compilerRunSweep compiles each fn, makes it reachable with zero args, and RUNS it (daemon up) with a 2s timeout, classifying each: cf| (didn't compile), hang (timed out), crash|, or ran|. This turns the compile-coverage headline into an actually-executes number and surfaces the finger-tree hangs as explicit failures instead of hiding them behind "compiles". First 30 fns: 15 ran, 13 cf, 2 crash. --- .../Builtins.Compiler/Libs/Compiler.fs | 89 +++++++++++++++++-- backend/src/LibCompiler/CompilerLibrary.fs | 32 ++++--- 2 files changed, 103 insertions(+), 18 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index d9ad0d656d..d3a950f5d6 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -695,6 +695,54 @@ let private startDaemon with _ -> () (task, shutdown) +/// Compile a fn by hash, make it reachable with zero args, RUN it (daemon up, so +/// effectful builtins are serviced) with a timeout, and classify the outcome: +/// "cf|" compile-fail, "hang" (timed out — e.g. multi-element list), +/// "crash|", or "ran|". This is the runnable-vs-compilable measure. +let private runOne + (exeState : ExecutionState) + (vm : VMState) + (effectful : Map) + (timeoutMs : int) + (hash : string) + : Ply = + uply { + try + let! pieces = buildPieces effectful hash + match pieces with + | Error e -> return "cf|" + e + | Ok(typeDefs, fds, rootName) -> + match fds |> List.tryFind (fun fd -> fd.Name = rootName) with + | None -> return "cf|root not bridged" + | Some rootFd -> + let defsByName = + typeDefs + |> List.choose (fun td -> + match td with + | AST.RecordDef(n, _, _) -> Some(n, td) + | AST.SumTypeDef(n, _, _) -> Some(n, td) + | AST.TypeAlias(n, _, _) -> Some(n, td)) + |> Map.ofList + let dummy = rootParamTypes rootFd |> List.map (zeroValue defsByName Set.empty) + match List.tryPick (function Error e -> Some e | Ok _ -> None) dummy with + | Some e -> return "cf|arg-synth: " + e + | None -> + let args = dummy |> List.choose (function Ok x -> Some x | Error _ -> None) + match compileClosure typeDefs fds (mainCall rootFd args) with + | Error e -> return "cf|" + e + | Ok binary -> + let (daemon, shutdown) = startDaemon exeState vm + let out = + try CompilerLibrary.execute 0 timeoutMs binary + with e -> { ExitCode = -1; Stdout = ""; Stderr = e.Message; RuntimeTime = System.TimeSpan.Zero } + shutdown () + let _ = (try daemon.Wait() with _ -> ()) + if out.ExitCode = -999 then return "hang" + elif out.ExitCode <> 0 then return $"crash|{out.ExitCode}" + else return "ran|" + out.Stdout.Trim() + with e -> return "cf|exn: " + e.Message + } + let fns () : List = [ { name = fn "compilerInfo" 0 typeParams = [] @@ -745,7 +793,7 @@ let fns () : List = match compileSource source with | Error e -> outcome false $"compile: {e}" |> Ply | Ok binary -> - let out = CompilerLibrary.execute 0 binary + let out = CompilerLibrary.execute 0 10000 binary if out.ExitCode = 0 then outcome true out.Stdout |> Ply else outcome false $"exit {out.ExitCode}: {out.Stderr}" |> Ply | _ -> incorrectArgs ()) @@ -776,7 +824,7 @@ let fns () : List = daemon.Wait() return DString $"compile-error: {e}" | Ok binary -> - let out = CompilerLibrary.execute 0 binary + let out = CompilerLibrary.execute 0 10000 binary daemon.Wait() return DString $"binary stdout={out.Stdout.Trim()} (expected 5)" } @@ -816,7 +864,7 @@ let fns () : List = daemon.Wait() return DString $"compile-error: {e}" | Ok binary -> - let out = CompilerLibrary.execute 0 binary + let out = CompilerLibrary.execute 0 10000 binary daemon.Wait() return DString(out.Stdout.Trim()) } @@ -864,7 +912,7 @@ let fns () : List = match compileAst program with | Error e -> outcome false $"compile: {e}" |> Ply | Ok binary -> - let out = CompilerLibrary.execute 0 binary + let out = CompilerLibrary.execute 0 10000 binary if out.ExitCode = 0 then outcome true out.Stdout |> Ply else outcome false $"exit {out.ExitCode}: {out.Stderr}" |> Ply | _ -> incorrectArgs ()) @@ -899,7 +947,7 @@ let fns () : List = daemon.Wait() return DString $"compile-error: {e}" | Ok binary -> - let out = CompilerLibrary.execute 0 binary + let out = CompilerLibrary.execute 0 10000 binary shutdown () daemon.Wait() return DString(out.Stdout.Trim()) @@ -939,7 +987,7 @@ let fns () : List = daemon.Wait() return DString $"compile-error: {e}" | Ok binary -> - let out = CompilerLibrary.execute 0 binary + let out = CompilerLibrary.execute 0 10000 binary shutdown () daemon.Wait() return DString(out.Stdout.Trim()) @@ -987,7 +1035,7 @@ let fns () : List = // Start the host-RPC daemon so any effectful builtins the fn // calls are serviced by the real runtime, then run the binary. let (daemon, shutdown) = startDaemon exeState vm - let out = CompilerLibrary.execute 0 binary + let out = CompilerLibrary.execute 0 10000 binary shutdown () daemon.Wait() return @@ -1044,6 +1092,33 @@ let fns () : List = sqlSpec = NotQueryable previewable = Impure capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + { name = fn "compilerRunSweep" 0 + typeParams = [] + parameters = + [ Param.make "hashes" (TList TString) "package fn content hashes to compile AND run" ] + returnType = TString + description = + "Runnable-vs-compilable sweep: for each fn hash, compiles it, makes it reachable with zero args, and RUNS the binary (daemon up) with a 2s timeout. One line per hash: cf| (didn't compile), hang (timed out — e.g. the multi-element list bug), crash|, or ran|. Turns the compile-coverage number into an actually-executes number and surfaces runtime hangs as failures." + fn = + (function + | exeState, vm, _, [ DList(_, hashes) ] -> + uply { + let effectful = buildEffectfulMap exeState + let mutable lines : List = [] + for hd in hashes do + match hd with + | DString hash -> + let! r = runOne exeState vm effectful 2000 hash + lines <- lines @ [ r ] + | _ -> lines <- lines @ [ "cf|non-string-hash" ] + return DString(String.concat "\n" lines) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps deprecated = NotDeprecated } ] let builtins () = LibExecution.Builtin.make [] (fns ()) diff --git a/backend/src/LibCompiler/CompilerLibrary.fs b/backend/src/LibCompiler/CompilerLibrary.fs index 81c6bf2900..0af5423a92 100644 --- a/backend/src/LibCompiler/CompilerLibrary.fs +++ b/backend/src/LibCompiler/CompilerLibrary.fs @@ -1742,7 +1742,10 @@ let compileAstProgram (request: CompileRequest) (ast: AST.Program) : CompileRepo compileUserWithPlan plan /// Execute compiled binary and capture output -let execute (verbosity: int) (binary: byte array) : ExecutionOutput = +/// Execute a compiled binary. timeoutMs > 0 kills the process (exit -999, +/// stderr "TIMEOUT") if it doesn't finish in time — essential for sweeping fns +/// that may hang (e.g. the x64 multi-element list runtime bug). <= 0 = no timeout. +let execute (verbosity: int) (timeoutMs: int) (binary: byte array) : ExecutionOutput = let sw = Stopwatch.StartNew() let finish (exitCode: int) (stdout: string) (stderr: string) : ExecutionOutput = sw.Stop() @@ -1837,20 +1840,27 @@ let execute (verbosity: int) (binary: byte array) : ExecutionOutput = let stdoutTask = proc.StandardOutput.ReadToEndAsync() let stderrTask = proc.StandardError.ReadToEndAsync() - // Wait for process to complete - proc.WaitForExit() + // Wait for process to complete (with optional timeout) + let exited = + if timeoutMs > 0 then proc.WaitForExit(timeoutMs) + else proc.WaitForExit(); true - // Now wait for output to be fully read - let stdout = stdoutTask.Result - let stderr = stderrTask.Result + if not exited then + // Hung: kill it and report a distinct timeout result. + (try proc.Kill(true) with _ -> ()) + finish -999 "" "TIMEOUT" + else + // Now wait for output to be fully read + let stdout = stdoutTask.Result + let stderr = stderrTask.Result - let execTime = sw.Elapsed.TotalMilliseconds - execStart - if verbosity >= 2 then println $" {System.Math.Round(execTime, 1)}ms" + let execTime = sw.Elapsed.TotalMilliseconds - execStart + if verbosity >= 2 then println $" {System.Math.Round(execTime, 1)}ms" - if verbosity >= 1 then - println $" ✓ Execution complete ({System.Math.Round(sw.Elapsed.TotalMilliseconds, 1)}ms)" + if verbosity >= 1 then + println $" ✓ Execution complete ({System.Math.Round(sw.Elapsed.TotalMilliseconds, 1)}ms)" - finish proc.ExitCode stdout stderr + finish proc.ExitCode stdout stderr finally // Cleanup - ignore deletion errors tryDeleteFile tempPath From 7122822d7c550aa27b8fd43c8ca9127120298ce0 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 13:54:47 -0400 Subject: [PATCH 118/172] compiler: escape newlines in run-sweep output (clean classification) --- backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index d3a950f5d6..c7a1b841b2 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -739,7 +739,7 @@ let private runOne let _ = (try daemon.Wait() with _ -> ()) if out.ExitCode = -999 then return "hang" elif out.ExitCode <> 0 then return $"crash|{out.ExitCode}" - else return "ran|" + out.Stdout.Trim() + else return "ran|" + out.Stdout.Trim().Replace("\n", "\\n") with e -> return "cf|exn: " + e.Message } From 4ad43d64c87dc7a7c02e97f8526fd06644281d58 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 14:02:07 -0400 Subject: [PATCH 119/172] compiler: run-sweep does a differential interpreter check for scalar fns MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Extends runOne: when a compilable fn is non-generic with all-scalar params, it now also runs the SAME fn in the interpreter (executeFunction with matching zero Dvals) and compares the output — reporting match|, diff|c=..|i=.., or ierr. Non-scalar-param/return fns and generics stay 'ran'. This is the start of the real 'yields the same results' measurement; broadening the arg-synth + repr to records/enums/lists is next. --- .../Builtins.Compiler/Libs/Compiler.fs | 57 ++++++++++++++++++- 1 file changed, 56 insertions(+), 1 deletion(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index c7a1b841b2..e4d3a1a0e8 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -739,7 +739,62 @@ let private runOne let _ = (try daemon.Wait() with _ -> ()) if out.ExitCode = -999 then return "hang" elif out.ExitCode <> 0 then return $"crash|{out.ExitCode}" - else return "ran|" + out.Stdout.Trim().Replace("\n", "\\n") + else + let compiledOut = out.Stdout.Trim() + // Differential check: run the SAME fn in the interpreter with the + // same zero args and compare. Restricted to non-generic fns whose + // params are scalars (so the Dval zeros exactly match the compiled + // zeroValue and the printed formats align) — otherwise just "ran". + let! ptFnOpt = LibDB.PackageManager.pt.getFn (PT.FQFnName.package hash) + match ptFnOpt with + | Some ptFn when List.isEmpty ptFn.typeParams -> + let scalarZero (t : PT.TypeReference) : Dval option = + match t with + | PT.TInt64 | PT.TInt -> Some(DInt64 0L) + | PT.TString -> Some(DString "") + | PT.TBool -> Some(DBool false) + | PT.TChar -> Some(DChar "a") + | PT.TUnit -> Some DUnit + | PT.TFloat -> Some(DFloat 0.0) + | _ -> None + let paramList = NEList.toList ptFn.parameters + let zeros : List = + paramList |> List.map (fun (p : PT.PackageFn.Parameter) -> scalarZero p.typ) + if List.exists Option.isNone zeros then + return "ran|" + compiledOut.Replace("\n", "\\n") + else + let dvalArgs : List = zeros |> List.choose (fun x -> x) + let argsNE = + match dvalArgs with + | [] -> NEList.singleton DUnit + | args -> NEList.ofListUnsafe "runOne diff args" [] args + let interpResult = + try + match (LibExecution.Execution.executeFunction + exeState (FQFnName.fqPackage hash) [] argsNE).Result with + | Ok v -> Some v + | Error _ -> None + with _ -> None + match interpResult with + | None -> return "ierr|" + compiledOut.Replace("\n", "\\n") + | Some iv -> + let irepr = + match iv with + | DInt64 n -> Some(string n) + | DInt n -> Some(string (DarkInt.toBigInt n)) + | DString s -> Some s + | DBool b -> Some(if b then "true" else "false") + | DFloat f -> Some(string f) + | DChar c -> Some c + | DUnit -> Some "" + | _ -> None + match irepr with + | None -> return "ran|" + compiledOut.Replace("\n", "\\n") + | Some istr -> + let norm (s : string) = s.Trim().Trim('"') + if norm compiledOut = norm istr then return "match|" + norm istr + else return $"diff|c={norm compiledOut}|i={norm istr}" + | _ -> return "ran|" + compiledOut.Replace("\n", "\\n") with e -> return "cf|exn: " + e.Message } From 29068a9988c00cc22389535fb8f62bc75ad59c54 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 14:04:30 -0400 Subject: [PATCH 120/172] compiler: run-sweep tags each line with the fn hash; normalize Unit/newlines in diff MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Each run-sweep line is now '\t' so a diff/crash can be traced to its fn. Diff normalization strips the compiler's '()' Unit-print and escapes newlines, killing false diffs. (Found a real one — c=2 vs interpreter 3 — hunting it next.) --- backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index e4d3a1a0e8..98f174620c 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -791,7 +791,9 @@ let private runOne match irepr with | None -> return "ran|" + compiledOut.Replace("\n", "\\n") | Some istr -> - let norm (s : string) = s.Trim().Trim('"') + let norm (s : string) = + let t = (s.Trim().Trim('"')).Replace("\n", "\\n") + if t = "()" then "" else t if norm compiledOut = norm istr then return "match|" + norm istr else return $"diff|c={norm compiledOut}|i={norm istr}" | _ -> return "ran|" + compiledOut.Replace("\n", "\\n") @@ -1166,8 +1168,8 @@ let fns () : List = match hd with | DString hash -> let! r = runOne exeState vm effectful 2000 hash - lines <- lines @ [ r ] - | _ -> lines <- lines @ [ "cf|non-string-hash" ] + lines <- lines @ [ hash + "\t" + r ] + | _ -> lines <- lines @ [ "?\tcf|non-string-hash" ] return DString(String.concat "\n" lines) } | _ -> incorrectArgs ()) From 4b73bbfeccfc822113a6a5698d6c405595acdb37 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 14:10:02 -0400 Subject: [PATCH 121/172] compiler: diff-sweep skips non-deterministic fns (double-interp) + showFn debug MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Runs the interpreter twice; if it disagrees with itself the fn is effectful/ non-deterministic (e.g. cliSpawnProcess — the c=2/i=3 'diff' was a spawned-process handle, not a miscompile) and is reported 'nondet' instead of compared. Adds compilerShowFn for tracing a hash to its source. This makes the match/diff signal mean actual correctness. --- .../Builtins.Compiler/Libs/Compiler.fs | 59 ++++++++++++++----- 1 file changed, 44 insertions(+), 15 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 98f174620c..4c359492da 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -768,27 +768,31 @@ let private runOne match dvalArgs with | [] -> NEList.singleton DUnit | args -> NEList.ofListUnsafe "runOne diff args" [] args - let interpResult = + let runInterp () = try match (LibExecution.Execution.executeFunction exeState (FQFnName.fqPackage hash) [] argsNE).Result with | Ok v -> Some v | Error _ -> None with _ -> None - match interpResult with - | None -> return "ierr|" + compiledOut.Replace("\n", "\\n") - | Some iv -> - let irepr = - match iv with - | DInt64 n -> Some(string n) - | DInt n -> Some(string (DarkInt.toBigInt n)) - | DString s -> Some s - | DBool b -> Some(if b then "true" else "false") - | DFloat f -> Some(string f) - | DChar c -> Some c - | DUnit -> Some "" - | _ -> None - match irepr with + let scalarRepr (d : Dval) : string option = + match d with + | DInt64 n -> Some(string n) + | DInt n -> Some(string (DarkInt.toBigInt n)) + | DString s -> Some s + | DBool b -> Some(if b then "true" else "false") + | DFloat f -> Some(string f) + | DChar c -> Some c + | DUnit -> Some "" + | _ -> None + let iv1, iv2 = runInterp (), runInterp () + match iv1, iv2 with + | Some a, Some b when (scalarRepr a) <> (scalarRepr b) -> + // interpreter itself gave two answers -> effectful/non-deterministic; don't compare + return "nondet|" + compiledOut.Replace("\n", "\\n") + | None, _ | _, None -> return "ierr|" + compiledOut.Replace("\n", "\\n") + | Some iv, _ -> + match scalarRepr iv with | None -> return "ran|" + compiledOut.Replace("\n", "\\n") | Some istr -> let norm (s : string) = @@ -1151,6 +1155,31 @@ let fns () : List = capabilities = LibExecution.Capabilities.noCaps deprecated = NotDeprecated } + { name = fn "compilerShowFn" 0 + typeParams = [] + parameters = [ Param.make "hash" TString "package fn content hash" ] + returnType = TString + description = "Debug: fetch a package fn by hash and return its name + F# structural repr of params and body." + fn = + (function + | _, _, _, [ DString hash ] -> + uply { + let! fnOpt = LibDB.PackageManager.pt.getFn (PT.FQFnName.package hash) + match fnOpt with + | None -> return DString "not found" + | Some(f : PT.PackageFn.PackageFn) -> + let ps = + NEList.toList f.parameters + |> List.map (fun (p : PT.PackageFn.Parameter) -> $"{p.name}: {p.typ}") + |> String.concat ", " + return DString $"ret={f.returnType}\ntypeParams={f.typeParams}\nparams=({ps})\nbody={f.body}" + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + { name = fn "compilerRunSweep" 0 typeParams = [] parameters = From be70e76a34fd1bb46e2887132bb708df174be58d Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 14:13:11 -0400 Subject: [PATCH 122/172] =?UTF-8?q?compiler:=20diff-sweep=20repr=20covers?= =?UTF-8?q?=20lists=20(match=20compiler's=20[a,=20b]=20print)=20=E2=80=94?= =?UTF-8?q?=20more=20fns=20verified?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../Builtins/Builtins.Compiler/Libs/Compiler.fs | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 4c359492da..fa351df7b5 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -775,7 +775,14 @@ let private runOne | Ok v -> Some v | Error _ -> None with _ -> None - let scalarRepr (d : Dval) : string option = + // Repr matching the compiler's own print format so outputs can be + // compared: strings raw at top level but quoted inside a list, + // list as [a, b], Unit as "". None => not comparable (skip). + let rec reprNested (d : Dval) : string option = + match d with + | DString s -> Some("\"" + s + "\"") + | _ -> scalarRepr d + and scalarRepr (d : Dval) : string option = match d with | DInt64 n -> Some(string n) | DInt n -> Some(string (DarkInt.toBigInt n)) @@ -784,6 +791,12 @@ let private runOne | DFloat f -> Some(string f) | DChar c -> Some c | DUnit -> Some "" + | DList(_, xs) -> + let parts = xs |> List.map reprNested + if List.exists Option.isNone parts then None + else + let strs = parts |> List.choose (fun (x : string option) -> x) + Some("[" + String.concat ", " strs + "]") | _ -> None let iv1, iv2 = runInterp (), runInterp () match iv1, iv2 with From d59db8cc69b99918724c81cca9433eeeebc36ecb Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 14:26:01 -0400 Subject: [PATCH 123/172] compiler: arg-synthesis handles function-typed params (dummy lambda) (1314 -> 1364) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit A higher-order fn (one taking a lambda param) couldn't be made reachable — the harness had no zero for a TFunction, so it hard-failed "no zero literal for TFunction". zeroValue now synthesizes a dummy `(a0, a1, …) => ` that ignores its args (param types are TVar so the compiler infers them), making the fn compilable. Purely a reachability fix (never run with these args in earnest). Sweep: 1314 -> 1364 / 3900 (35.0%). Session 769 -> 1364 (+595). --- .../src/Builtins/Builtins.Compiler/Libs/Compiler.fs | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index fa351df7b5..f20fbcadea 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -435,6 +435,18 @@ let rec private zeroValue | AST.TTuple ts -> ts |> List.map (zeroValue defs seen) |> allOk |> Result.map AST.TupleLiteral | AST.TList _ -> Ok(AST.ListLiteral []) + | AST.TFunction(argTypes, retType) -> + // A function param: synthesize a dummy lambda `(a0, a1, …) => ` + // that ignores its args, so a higher-order fn can be made reachable. Param + // types are TVar so the compiler infers them at the call site. + zeroValue defs seen retType + |> Result.map (fun body -> + let ps = + argTypes + |> List.mapi (fun i _ -> ($"__zlam{i}", AST.TVar $"__zlamt{i}")) + match ps with + | [] -> AST.Lambda(AST.NonEmptyList.fromList [ ("__zlam0", AST.TVar "__zlamt0") ], body) + | _ -> AST.Lambda(AST.NonEmptyList.fromList ps, body)) | AST.TVar _ -> zeroLit AST.TInt64 // an unmapped signature tvar: monomorphize at Int64 | AST.TBytes -> // No bytes literal exists in the AST; synthesize an empty blob via the cast From 3b4db16e97b93d323ce2dee35cbee028922d5a3f Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 14:30:47 -0400 Subject: [PATCH 124/172] compiler: diff-sweep synthesizes record/enum/option zero args (broaden verification) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit zeroDvalPT mirrors the compiled zeroValue on the interpreter side — scalars, lists, tuples, Option(None), and non-generic records/enums (first-terminating variant) — fetched from the param types' closure. Conservative: returns None (skip the diff) for generics/aliases/functions/dicts, so a synthesis mismatch can never look like a miscompile. Broadens the set of fns whose compiled output is verified against the interpreter beyond scalar-param fns. --- .../Builtins.Compiler/Libs/Compiler.fs | 64 ++++++++++++++++++- 1 file changed, 61 insertions(+), 3 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index f20fbcadea..a6f2d01748 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -760,7 +760,22 @@ let private runOne let! ptFnOpt = LibDB.PackageManager.pt.getFn (PT.FQFnName.package hash) match ptFnOpt with | Some ptFn when List.isEmpty ptFn.typeParams -> - let scalarZero (t : PT.TypeReference) : Dval option = + let paramList = NEList.toList ptFn.parameters + // Fetch the param types' closure so record/enum params can be + // zeroed the same way the compiled zeroValue does. + let typeSeeds = + paramList + |> List.collect (fun (p : PT.PackageFn.Parameter) -> Bridge.typeRefsInType p.typ) + |> List.distinct + let! typeClosure = fetchTypeClosure Set.empty [] typeSeeds + let declMap = + match typeClosure with + | Ok ts -> ts |> List.map (fun (h, pt) -> (h, pt.declaration)) |> Map.ofList + | Error _ -> Map.empty + // Interpreter-side zero, mirroring zeroValue. Conservative: None + // (skip the diff) for generics/aliases/functions/dicts, so a + // synthesis mismatch can never masquerade as a miscompile. + let rec zeroDvalPT (seen : Set) (t : PT.TypeReference) : Dval option = match t with | PT.TInt64 | PT.TInt -> Some(DInt64 0L) | PT.TString -> Some(DString "") @@ -768,10 +783,53 @@ let private runOne | PT.TChar -> Some(DChar "a") | PT.TUnit -> Some DUnit | PT.TFloat -> Some(DFloat 0.0) + | PT.TList _ -> Some(DList(ValueType.Unknown, [])) + | PT.TTuple(a, b, rest) -> + let zs = (a :: b :: rest) |> List.map (zeroDvalPT seen) + if List.exists Option.isNone zs then None + else + match zs |> List.choose (fun x -> x) with + | x1 :: x2 :: r -> Some(DTuple(x1, x2, r)) + | _ -> None + | PT.TCustomType(nr, _) -> + match nr.resolved with + | Ok resolved -> + match resolved.name with + | PT.FQTypeName.Package(PT.Hash h) -> + let tn = FQTypeName.fqPackage h + if h = Bridge.optionTypeHash then + Some(DEnum(tn, tn, [ ValueType.Unknown ], "None", [])) + elif Set.contains h seen then None + else + match Map.tryFind h declMap with + | Some(decl : PT.TypeDeclaration.T) when List.isEmpty decl.typeParams -> + match decl.definition with + | PT.TypeDeclaration.Record fields -> + let fzs = + NEList.toList fields + |> List.map (fun (f : PT.TypeDeclaration.RecordField) -> + (f.name, zeroDvalPT (Set.add h seen) f.typ)) + if fzs |> List.exists (snd >> Option.isNone) then None + else + Some( + DRecord( + tn, tn, [], + fzs |> List.map (fun (n, v) -> (n, Option.get v)) |> Map.ofList)) + | PT.TypeDeclaration.Enum cases -> + NEList.toList cases + |> List.tryPick (fun (c : PT.TypeDeclaration.EnumCase) -> + let pzs = + c.fields + |> List.map (fun (ef : PT.TypeDeclaration.EnumField) -> + zeroDvalPT (Set.add h seen) ef.typ) + if pzs |> List.exists Option.isNone then None + else Some(DEnum(tn, tn, [], c.name, pzs |> List.choose (fun x -> x)))) + | PT.TypeDeclaration.Alias _ -> None + | _ -> None + | Error _ -> None | _ -> None - let paramList = NEList.toList ptFn.parameters let zeros : List = - paramList |> List.map (fun (p : PT.PackageFn.Parameter) -> scalarZero p.typ) + paramList |> List.map (fun (p : PT.PackageFn.Parameter) -> zeroDvalPT Set.empty p.typ) if List.exists Option.isNone zeros then return "ran|" + compiledOut.Replace("\n", "\\n") else From 4ea0e0e62bfc1282ae2f3e096c273b3fc2af98de Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 14:34:14 -0400 Subject: [PATCH 125/172] compiler: diff comparison tolerates float (0.0=0) + empty-container formats The two 'diffs' on the 400-sample were format artifacts, not miscompiles: the compiler prints a whole float as 0.0 (interp '0') and an empty list as empty (interp '[]'). Compare numerically when both parse as numbers, and normalize []/() to empty. Keeps the match/diff signal at true correctness. --- .../src/Builtins/Builtins.Compiler/Libs/Compiler.fs | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index a6f2d01748..413f0422a6 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -880,9 +880,15 @@ let private runOne | Some istr -> let norm (s : string) = let t = (s.Trim().Trim('"')).Replace("\n", "\\n") - if t = "()" then "" else t - if norm compiledOut = norm istr then return "match|" + norm istr - else return $"diff|c={norm compiledOut}|i={norm istr}" + if t = "()" || t = "[]" then "" else t + let ca, ia = norm compiledOut, norm istr + // numeric equality handles the compiler's "0.0" vs the interp's "0" + let numEq = + match System.Double.TryParse ca, System.Double.TryParse ia with + | (true, x), (true, y) -> x = y + | _ -> false + if ca = ia || numEq then return "match|" + ia + else return $"diff|c={ca}|i={ia}" | _ -> return "ran|" + compiledOut.Replace("\n", "\\n") with e -> return "cf|exn: " + e.Message } From ca01f9ea6d29f8b834d00a96a90d7acf1d90df44 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 14:50:23 -0400 Subject: [PATCH 126/172] =?UTF-8?q?compiler:=20re-enable=20List=20marshall?= =?UTF-8?q?ing=20=E2=80=94=20the=20finger-tree=20"hang"=20was=20a=20harnes?= =?UTF-8?q?s=20bug?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Native multi-element lists work fine (proven, no daemon: `match [7,8,9]` -> 7, `List.length(List.map([1,2,3,4], x=>x+10))` -> 4, `unmarshalTyped(List)` of a wire list -> length 3). The earlier "finger-tree hang" was a MISDIAGNOSIS: the diagnostic self-tests started a daemon that blocks on File.ReadAllText of the request FIFO until a writer appears, and a pure list program makes no RPC — so the daemon blocked forever and daemon.Wait() never returned. The compiler's list runtime was never broken. So rtToMarshalable re-enables TList: list-returning builtins route through the daemon and decode to native lists again. (The opaque-handle model still works and is a fine general mechanism, but lists don't need it.) Adds compilerNativeListTest. Sweep: 1364 -> 1367 / 3900 (35.1%). --- .../Builtins.Compiler/Libs/Compiler.fs | 28 +++++++++++++++++-- 1 file changed, 26 insertions(+), 2 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 413f0422a6..f10415e02e 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -142,8 +142,7 @@ let rec private rtToMarshalable (t : TypeReference) : AST.Type option = | TInt -> Some AST.TInt64 | TBool -> Some AST.TBool | TUnit -> Some AST.TUnit - // TList is excluded pending a runtime hang in the compiled list-decode path - // (Option/Result are proven); the unmarshalTyped TList case stays for when it lands. + | TList inner -> rtToMarshalable inner |> Option.map AST.TList | TCustomType(nr, args) -> match nr.resolved with | Ok(FQTypeName.Package(Hash h)) -> @@ -1244,6 +1243,31 @@ let fns () : List = capabilities = LibExecution.Capabilities.noCaps deprecated = NotDeprecated } + { name = fn "compilerNativeListTest" 0 + typeParams = [] + parameters = [ Param.make "unit" TUnit "" ] + returnType = TString + description = "Debug: does a native multi-element list [7,8,9] match head work at runtime (no daemon)? Returns 7, or hangs/crashes if the finger-tree is broken." + fn = + (function + | _, _, _, [ DUnit ] -> + uply { + // Decode a wire list "alpha\\nbeta\\ngamma" via unmarshalTyped(List), no daemon -> length 3 + let decoded = Bridge.unmarshalTyped 0 (AST.TList AST.TString) (AST.StringLiteral "alpha\nbeta\ngamma") + let len = AST.TypeApp("Stdlib.List.length", [ AST.TString ], AST.NonEmptyList.singleton decoded) + let program = AST.Program [ AST.Expression(AST.Call("Stdlib.Int64.toString", AST.NonEmptyList.singleton len)) ] + match compileAst program with + | Error e -> return DString ("compile: " + e) + | Ok binary -> + let out = CompilerLibrary.execute 0 5000 binary + return DString (if out.ExitCode = -999 then "HANG" elif out.ExitCode <> 0 then $"crash {out.ExitCode}" else out.Stdout.Trim()) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + { name = fn "compilerShowFn" 0 typeParams = [] parameters = [ Param.make "hash" TString "package fn content hash" ] From 547f855f1ec6e916b5b6110a8685aad14ca4b317 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 15:11:28 -0400 Subject: [PATCH 127/172] compiler: perf-compare builtin + fib benchmark fixture MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Builtin.compilerPerfCompare runs an Int64->Int64 fn both ways IN-PROCESS — compiled native binary vs the interpreter's executeFunction — times each with a Stopwatch (warming the compiled binary once first), and reports both wall-times + the ratio. Adds Stdlib.PerfDemo.fib (naive recursive Fibonacci) as a compute-heavy fixture, plus compilerShowFn/compilerNativeListTest debug helpers. Result, fib(27) = 196418 (both agree, correct): compiled 9.28 ms (incl. process launch) interpreted 21783.79 ms => ~2347x faster, same answer. AOT vs tree-walking interpreter, end to end. --- .../Builtins.Compiler/Libs/Compiler.fs | 51 +++++++++++++++++++ packages/darklang/stdlib/perfDemo.dark | 9 ++++ 2 files changed, 60 insertions(+) create mode 100644 packages/darklang/stdlib/perfDemo.dark diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index f10415e02e..f9708db915 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -1293,6 +1293,57 @@ let fns () : List = capabilities = LibExecution.Capabilities.noCaps deprecated = NotDeprecated } + { name = fn "compilerPerfCompare" 0 + typeParams = [] + parameters = + [ Param.make "hash" TString "package fn hash (Int64 -> Int64)" + Param.make "n" TInt64 "the Int64 argument" ] + returnType = TString + description = "Benchmarks one Int64->Int64 fn at arg n: runs it compiled (native binary) and interpreted (executeFunction), times each with a Stopwatch, and reports both wall times + the result. For a fair compute comparison use a heavy fn (e.g. naive fib)." + fn = + (function + | exeState, _, _, [ DString hash; DInt64 n ] -> + uply { + let effectful = buildEffectfulMap exeState + // --- compiled --- + let! pieces = buildPieces effectful hash + match pieces with + | Error e -> return DString ("bridge: " + e) + | Ok(typeDefs, fds, rootName) -> + let program : AST.Program = + AST.Program( + (typeDefs |> List.map AST.TypeDef) + @ (fds |> List.map AST.FunctionDef) + @ [ AST.Expression(AST.Call(rootName, AST.NonEmptyList.singleton (AST.Int64Literal n))) ]) + match compileAst program with + | Error e -> return DString ("compile: " + e) + | Ok binary -> + // warm once, then time + let _warm = CompilerLibrary.execute 0 60000 binary + let swC = System.Diagnostics.Stopwatch.StartNew() + let outC = CompilerLibrary.execute 0 60000 binary + swC.Stop() + // --- interpreted --- + let args = NEList.singleton (DInt64 n) + let swI = System.Diagnostics.Stopwatch.StartNew() + let interp = + try + match (LibExecution.Execution.executeFunction exeState (FQFnName.fqPackage hash) [] args).Result with + | Ok v -> dvalToWire v + | Error _ -> "interp-error" + with e -> "interp-exn: " + e.Message + swI.Stop() + let cMs = swC.Elapsed.TotalMilliseconds + let iMs = swI.Elapsed.TotalMilliseconds + let speedup = if cMs > 0.0 then iMs / cMs else 0.0 + return DString $"n={n} compiled={outC.Stdout.Trim()} in {System.Math.Round(cMs,2)}ms (incl process launch) | interpreted={interp} in {System.Math.Round(iMs,2)}ms | interp/compiled = {System.Math.Round(speedup,1)}x" + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + { name = fn "compilerRunSweep" 0 typeParams = [] parameters = diff --git a/packages/darklang/stdlib/perfDemo.dark b/packages/darklang/stdlib/perfDemo.dark new file mode 100644 index 0000000000..a40f51221f --- /dev/null +++ b/packages/darklang/stdlib/perfDemo.dark @@ -0,0 +1,9 @@ +module Darklang.Stdlib.PerfDemo + +/// Naive recursive Fibonacci — a compute-heavy benchmark for comparing the +/// interpreter against the native compiler (exponential calls, shallow stack). +let fib (n: Int64) : Int64 = + if n < 2L then + n + else + (Stdlib.PerfDemo.fib (n - 1L)) + (Stdlib.PerfDemo.fib (n - 2L)) From 9497f80e33a2e112add5e92f596a70b428ef09da Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 15:31:17 -0400 Subject: [PATCH 128/172] =?UTF-8?q?compiler:=20Darklang.Perf.compareEval?= =?UTF-8?q?=20=E2=80=94=20compile=20a=20fn=20value=20+=20benchmark=20vs=20?= =?UTF-8?q?interpreter?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Takes an Int64->Int64 package fn value and an argument, compiles the fn with the native compiler, and prints a pretty in-process report: the result, whether compiled and interpreted agree, native binary size, both wall times, speedup. Darklang.Perf.compareEval Stdlib.PerfDemo.fib 27L => fib(27)=196418, compiled/interpreted match, 640 bytes, 3576x faster The fn param is a real TFn value, so it uses Param.makeWithArgs (not make, which asserts non-fn). perfCompareEval unwraps DApplicable(AppNamedFn) to the package hash, then reuses the perfBench helper. --- .../Builtins.Compiler/Libs/Compiler.fs | 103 ++++++++++++------ packages/darklang/perf.dark | 10 ++ 2 files changed, 80 insertions(+), 33 deletions(-) create mode 100644 packages/darklang/perf.dark diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index f9708db915..a02fd5d5d8 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -892,6 +892,51 @@ let private runOne with e -> return "cf|exn: " + e.Message } +/// Benchmark one Int64->Int64 package fn at arg n: compile it (bridge -> native +/// binary), run compiled vs interpreted (in-process), and return a pretty report. +let private perfBench (exeState : ExecutionState) (hash : string) (n : int64) : Ply = + uply { + let effectful = buildEffectfulMap exeState + let! pieces = buildPieces effectful hash + match pieces with + | Error e -> return " ✗ does not compile: " + e + | Ok(typeDefs, fds, rootName) -> + let program : AST.Program = + AST.Program( + (typeDefs |> List.map AST.TypeDef) + @ (fds |> List.map AST.FunctionDef) + @ [ AST.Expression(AST.Call(rootName, AST.NonEmptyList.singleton (AST.Int64Literal n))) ]) + match compileAst program with + | Error e -> return " ✗ compile error: " + e + | Ok binary -> + let _warm = CompilerLibrary.execute 0 120000 binary + let swC = System.Diagnostics.Stopwatch.StartNew() + let outC = CompilerLibrary.execute 0 120000 binary + swC.Stop() + let args = NEList.singleton (DInt64 n) + let swI = System.Diagnostics.Stopwatch.StartNew() + let interp = + try + match (LibExecution.Execution.executeFunction exeState (FQFnName.fqPackage hash) [] args).Result with + | Ok v -> dvalToWire v + | Error _ -> "" + with e -> "" + swI.Stop() + let cOut = outC.Stdout.Trim() + let cMs = swC.Elapsed.TotalMilliseconds + let iMs = swI.Elapsed.TotalMilliseconds + let agree = if cOut = interp then "✓ match" else "✗ DIFFER" + let speedup = if cMs > 0.0 then System.Math.Round(iMs / cMs, 0) else 0.0 + let bytes = binary.Length + return + " arg n = " + string n + "\n" + + " result " + cOut + " (compiled vs interpreted: " + agree + ")\n" + + " native size " + string bytes + " bytes\n" + + " interpreted " + string (System.Math.Round(iMs, 2)) + " ms\n" + + " compiled " + string (System.Math.Round(cMs, 2)) + " ms (incl. process launch)\n" + + " speedup " + string speedup + "x faster (compiled)" + } + let fns () : List = [ { name = fn "compilerInfo" 0 typeParams = [] @@ -1304,39 +1349,31 @@ let fns () : List = (function | exeState, _, _, [ DString hash; DInt64 n ] -> uply { - let effectful = buildEffectfulMap exeState - // --- compiled --- - let! pieces = buildPieces effectful hash - match pieces with - | Error e -> return DString ("bridge: " + e) - | Ok(typeDefs, fds, rootName) -> - let program : AST.Program = - AST.Program( - (typeDefs |> List.map AST.TypeDef) - @ (fds |> List.map AST.FunctionDef) - @ [ AST.Expression(AST.Call(rootName, AST.NonEmptyList.singleton (AST.Int64Literal n))) ]) - match compileAst program with - | Error e -> return DString ("compile: " + e) - | Ok binary -> - // warm once, then time - let _warm = CompilerLibrary.execute 0 60000 binary - let swC = System.Diagnostics.Stopwatch.StartNew() - let outC = CompilerLibrary.execute 0 60000 binary - swC.Stop() - // --- interpreted --- - let args = NEList.singleton (DInt64 n) - let swI = System.Diagnostics.Stopwatch.StartNew() - let interp = - try - match (LibExecution.Execution.executeFunction exeState (FQFnName.fqPackage hash) [] args).Result with - | Ok v -> dvalToWire v - | Error _ -> "interp-error" - with e -> "interp-exn: " + e.Message - swI.Stop() - let cMs = swC.Elapsed.TotalMilliseconds - let iMs = swI.Elapsed.TotalMilliseconds - let speedup = if cMs > 0.0 then iMs / cMs else 0.0 - return DString $"n={n} compiled={outC.Stdout.Trim()} in {System.Math.Round(cMs,2)}ms (incl process launch) | interpreted={interp} in {System.Math.Round(iMs,2)}ms | interp/compiled = {System.Math.Round(speedup,1)}x" + let! report = perfBench exeState hash n + return DString report + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + + { name = fn "perfCompareEval" 0 + typeParams = [] + parameters = + [ Param.makeWithArgs "fn" (TFn(NEList.singleton TInt64, TInt64)) "an Int64 -> Int64 fn" [ "n" ] + Param.make "n" TInt64 "the Int64 argument" ] + returnType = TString + description = "The user-facing perf comparison: pass a fn value (e.g. Stdlib.PerfDemo.fib) and an arg; compiles it, runs compiled-native vs interpreted in-process, and returns a pretty report with both times, the speedup, and whether the results match." + fn = + (function + | exeState, _, _, [ DApplicable(AppNamedFn nf); DInt64 n ] -> + uply { + match nf.name with + | FQFnName.Package(Hash h) -> + let! report = perfBench exeState h n + return DString ("\n" + report + "\n") + | _ -> return DString "perfCompareEval: not a package fn" } | _ -> incorrectArgs ()) sqlSpec = NotQueryable diff --git a/packages/darklang/perf.dark b/packages/darklang/perf.dark new file mode 100644 index 0000000000..fc057155e7 --- /dev/null +++ b/packages/darklang/perf.dark @@ -0,0 +1,10 @@ +module Darklang.Perf + +/// Compile with the native compiler and benchmark it at argument +/// against the interpreter, in-process. Returns a pretty report: the result, +/// whether compiled and interpreted agree, the native binary size, both wall +/// times, and the speedup. +/// +/// Example: `Darklang.Perf.compareEval Stdlib.PerfDemo.fib 27L` +let compareEval (fn: Int64 -> Int64) (n: Int64) : String = + Builtin.perfCompareEval fn n From e75d622323596bf1576440bd759cdc0f9da153ad Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 15:50:37 -0400 Subject: [PATCH 129/172] compiler: dotted package-fn names unblock bare generic calls (1366 -> 1487) The compiler monomorphizes generic calls only via TypeApp (explicit type args). The typechecker DOES infer type args for a bare Call to a generic fn and rewrites it to TypeApp -- except its RequireExplicitTypeArgsForBareCalls policy (on for InterpreterSyntax) hard-errors first for a "local user-defined generic": a name with no "." called with no type args in unconstrained (expectedType=None) position. The bridge named every package fn `fn_` -- dotless -- so every bare generic call site in unconstrained position hit that wall ("expects N type arguments, but got 0"): 351 such failures in the whole-tree sweep. Fix: name package fns `fn.` (dotted). The compiler treats dotted names as module-scoped (like Stdlib.List.map) and infers their type args, exactly as a qualified package fn should be treated. The dot is only a resolver signal -- x64 labels are internal Map keys resolved to byte offsets (never emitted as assembler text), so it is codegen-safe and normalizes to the same binary. All fn names flow through nameFor, so def/call/self/closure/root stay consistent. Whole-tree compile sweep (all 3900 package fns), aligned before/after: compiled 1366 -> 1487 (+121), and a per-hash diff shows 0 regressions (no fn that compiled before stopped compiling). The 351 type-arg-arity failures are gone; ~121 now produce a native binary and the rest advance to their next real blocker (TDict, unresolved values, unwrap, ...). Structural argument for 0 regressions: the policy only fires when expectedType=None, so any fn the change affects had such a call and therefore ALREADY errored (was non-compiling) -- a previously-compiling fn cannot be affected. The sweep confirms it empirically. --- backend/src/Builtins/Builtins.Compiler/Bridge.fs | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 1f723dd036..650577b27e 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -73,7 +73,15 @@ let private allOk (results : List>) : Result, string /// Deterministic compiler-side identifier for a package fn / type, from its /// content hash — so a whole call/type graph lowers with consistent names. -let nameFor (hash : string) : string = "fn_" + hash +// The "fn." prefix is deliberately dotted: the compiler's typechecker treats +// dotted names as module-scoped (like `Stdlib.List.map`) and INFERS type args +// for bare generic calls, whereas a dotless name is a "local user-defined +// generic" that `RequireExplicitTypeArgsForBareCalls` demands explicit type args +// for. Package fns are qualified, so module-scoped is correct — and it unblocks +// every bare generic call site. The dot is only a resolver signal: x64 labels are +// internal Map keys (never emitted as assembler text), so it's +// codegen-safe and normalizes to the same binary. +let nameFor (hash : string) : string = "fn." + hash let nameForType (hash : string) : string = "T_" + hash // Dark's Option/Result are ordinary package types, but the compiler ships its OWN From af27da4a859619365e9a82215e33d3134bfee976 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 15:56:51 -0400 Subject: [PATCH 130/172] compiler: route Builtin.unwrap through to the compiler intrinsic (+12) The compiler has a native `Builtin.unwrap`: the typechecker special-cases the name (1.5_TypeChecking.fs) and AST_to_ANF lowers it to a variant-tag check that yields the Some/Ok payload or panics on None/Error (2_AST_to_ANF.fs). The bridge just never routed Dark`s `unwrap` builtin, so every fn using it hard-failed `unsupported-builtin: unwrap_v0` (87 fns). Since our Option/Result are already the compiler`s native types, the arg matches directly. Add `"unwrap" -> "Builtin.unwrap"` to builtinToStdlib; the bridge then emits `AST.Call("Builtin.unwrap", [arg])`, exactly the shape the compiler expects. Of the 87 unwrap-blocked fns, 12 now compile (unwrap was their last blocker); the other 75 advance to their next real wall (mostly the List/List fold inference gap). Run-sweep on the 12: 0 diff, 0 nondet (the 8 ierr are zero-arg unwrap-of-None panicking in both engines). Strictly additive: every fn touched was already non-compiling, so no regression is possible. --- backend/src/Builtins/Builtins.Compiler/Bridge.fs | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 650577b27e..bd77321c13 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -112,7 +112,14 @@ let compilerTypeName (h : string) : string = /// runtime seam (daemon). Keyed by the main-repo builtin's bare name. let builtinToStdlib : Map = Map - [ // String + [ // `unwrap` is a compiler INTRINSIC, not a stdlib fn: the typechecker + // special-cases the name `Builtin.unwrap` (1.5_TypeChecking.fs) and lowers + // it to a variant-tag check that yields the Some/Ok payload or panics on + // None/Error (2_AST_to_ANF.fs). Our Option/Result are already the native + // types, so the arg matches. Emitting `AST.Call("Builtin.unwrap", [arg])` + // (same shape as a routed stdlib call) is exactly what the compiler wants. + "unwrap", "Builtin.unwrap" + // String "stringLength", "Stdlib.String.length" "stringIsEmpty", "Stdlib.String.isEmpty" "stringContains", "Stdlib.String.contains" From 0a34278366e29f178f746b1dedf884926ed5f671 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 16:52:30 -0400 Subject: [PATCH 131/172] compiler: route blocked pure stdlib list fns to native equivalents (+~49) The remaining frontier is gated by the compiler being unable to infer a bare-[] fold accumulator: Dark`s Stdlib.List.map is `list |> fold [] (fun acc e -> push acc (fn e))`, and the empty list gets a fresh tvar that never unifies with the lambda`s result (fails "expects List, got List"). The compiler`s OWN stdlib sidesteps this by writing empty() with explicit type args everywhere. These uncompilable Dark stdlib fns transitively block every caller. Where the compiler ships a REALLY-equivalent native impl, call it: route a call to an allowlisted stdlib fn to the compiler`s native fn and skip bridging the Dark definition. Restricted to fns that (a) do NOT currently compile as Dark and (b) have a native equivalent whose signature (arg order + lambda arg order) is verified identical -- so routing is purely additive and semantics match. The four that qualify today: List.map, List.filter, List.indexedMap, List.reverse (map/ filter/indexedMap hit the []-fold gap; reverse references an unbridged helper). referencedPackageFns skips them so the closure walk never pulls their Dark defs; the call sites (EApply + EPipeFnCall) emit a bare Call to the dotted native name so the compiler infers its type args. Whole-tree sweep 1487 -> 1548 (this + the unwrap commit), aligned per-hash diff: 0 regressions. Purely additive by construction: map`s def never compiled in ANY context, so every map-using fn was already failing -- no previously-compiling fn is touched. REALLY-equivalent verified: differential run-sweep on the gains = 13 byte-identical matches, 0 real diffs (the one "diff" is c=|i=[[0]] -- the compiler prints List> as empty on stdout; List.length of the nested result is 2/3 correct in both engines, proving native map computes the right value). This is a pragmatic unblock for pure ops, not the general fix -- the bare-[] inference gap still needs solving for non-stdlib code eventually. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 50 +++++++++++++++++-- 1 file changed, 45 insertions(+), 5 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index bd77321c13..c2a1c3f76d 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -84,6 +84,35 @@ let private allOk (results : List>) : Result, string let nameFor (hash : string) : string = "fn." + hash let nameForType (hash : string) : string = "T_" + hash +// Pure Darklang stdlib fns for which the compiler ships a REALLY-equivalent native +// implementation. A call to one is emitted as a call to the compiler's native fn, +// and its Dark definition is NOT bridged. This is deliberately restricted to fns +// that (a) do NOT currently compile as Dark and (b) have a native equivalent whose +// signature (arg order + lambda arg order) is verified identical — so routing is +// purely additive (the Dark version was failing anyway) and semantics match. The +// four here are all defined via a bare-`[]` fold accumulator (or a missing helper) +// the compiler can't infer; the native versions annotate `empty()` and compile. +// Keyed by (owner, modules, name); the native name is `modules...name` joined by ".". +// Equivalence is additionally gated by the differential run-sweep (0 diffs required). +let private nativeStdlibRoutes : Set = + [ "map"; "filter"; "indexedMap"; "reverse" ] + |> List.map (fun n -> ("Darklang", [ "Stdlib"; "List" ], n)) + |> Set.ofList + +/// If a resolved fn ref points at an allowlisted stdlib fn, the compiler's native +/// name to route it to; else None. +let routeNativeName (loc : PT.PackageLocation) : string option = + if Set.contains (loc.owner, loc.modules, loc.name) nativeStdlibRoutes then + Some(String.concat "." (loc.modules @ [ loc.name ])) + else + None + +/// Route a resolved fn-name reference (checks its binding location). +let routeResolved (resolved : PT.ResolvedName) : string option = + match resolved.location with + | Some loc -> routeNativeName loc + | None -> None + // Dark's Option/Result are ordinary package types, but the compiler ships its OWN // native Stdlib.Option.Option / Stdlib.Result.Result (its stdlib and the daemon's // unmarshaller use them). Bridging Dark's versions to a distinct T_ splits @@ -815,10 +844,14 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = | Error e, _ -> Error e | _, Error e -> Error e | Ok tas, Ok bas -> - if List.isEmpty tas then - Ok(AST.Call(nameFor h, AST.NonEmptyList.fromList bas)) + // A stdlib fn with a REALLY-equivalent native impl calls the native fn + // directly (its Dark def isn't bridged). Emit a bare Call so the compiler + // infers the native fn's type args (dotted name -> module-scoped). + let callName = routeResolved resolved |> Option.defaultValue (nameFor h) + if List.isEmpty tas || Option.isSome (routeResolved resolved) then + Ok(AST.Call(callName, AST.NonEmptyList.fromList bas)) else - Ok(AST.TypeApp(nameFor h, tas, AST.NonEmptyList.fromList bas)) + Ok(AST.TypeApp(callName, tas, AST.NonEmptyList.fromList bas)) // Self-recursion: `self(args)` calls the current fn by its compiled name. | PT.EApply(_, PT.ESelf _, _, args) -> args @@ -970,8 +1003,10 @@ and bridgePipePart | _, Error e -> Error e | Ok tl, Ok bas -> let full = piped :: bas - if List.isEmpty tl then Ok(AST.Call(nameFor h, AST.NonEmptyList.fromList full)) - else Ok(AST.TypeApp(nameFor h, tl, AST.NonEmptyList.fromList full)) + let callName = routeResolved resolved |> Option.defaultValue (nameFor h) + if List.isEmpty tl || Option.isSome (routeResolved resolved) then + Ok(AST.Call(callName, AST.NonEmptyList.fromList full)) + else Ok(AST.TypeApp(callName, tl, AST.NonEmptyList.fromList full)) | PT.EPipeEnum(_, nr, caseName, fields) -> typeHash nr |> Result.bind (fun h -> @@ -1115,6 +1150,9 @@ let rec referencedPackageFns (e : PT.Expr) : List = | PT.EApply(_, PT.EFnName(_, nr), _, args) -> let here = match nr.resolved with + // A routed stdlib fn is served by the compiler's native impl, so its Dark + // definition is never bridged — don't pull it into the compile closure. + | Ok resolved when Option.isSome (routeResolved resolved) -> [] | Ok resolved -> match resolved.name with | PT.FQFnName.Package(PT.Hash h) -> [ h ] @@ -1132,6 +1170,7 @@ let rec referencedPackageFns (e : PT.Expr) : List = match p with | PT.EPipeFnCall(_, nr, _, args) -> (match nr.resolved with + | Ok res when Option.isSome (routeResolved res) -> [] | Ok res -> match res.name with | PT.FQFnName.Package(PT.Hash h) -> [ h ] @@ -1187,6 +1226,7 @@ let rec typeRefsInExpr (e : PT.Expr) : List = match p with | PT.EPipeFnCall(_, nr, _, args) -> (match nr.resolved with + | Ok res when Option.isSome (routeResolved res) -> [] | Ok res -> match res.name with | PT.FQFnName.Package(PT.Hash h) -> [ h ] From 52836d50ccb19648223108021d9630417a24b97a Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 17:14:45 -0400 Subject: [PATCH 132/172] compiler: lambda lifting can infer if-bodies and list/string bodies Any lambda whose body was an `if` failed with "Lambda lifting could not infer return type for lambda body" -- e.g. `fun i -> if i < 0 then 0 else i`, which is everywhere in real code (index normalization, clamping, defaulting). Two gaps in simpleInferType (the lifting pass private inference): 1. Its If case demanded the branches infer to EXACTLY equal types. A lambda param carries a placeholder tvar from the parser (__interp_lambda_0_0_i), so `if i < 0 then 0 else i` gives then=Int64, else=TVar -> not equal -> None. This pass runs AFTER typechecking, so the branches are already proven to have the same type: when one side is an unresolved tvar, the concrete side IS the type. (The full inferType already does this via matchTypePattern; only the simple one lagged.) 2. InterpolatedString / UnaryOp / RecordUpdate / ListLiteral / ListCons fell through to `| _ -> None` even though each is trivially typed. A lambda body that built a string or a list therefore could not be lifted. Proven end-to-end (compiled results, not just compile-checks): (let n = (fun i -> if i < 0L then 0L else i) in (n 5L) + 1L) -> 6 (let len = 5L in let n = (fun i -> if i<0L then len else i) in n 3L) -> 3 slice with lambda-normalized indices -> "el" Whole-tree sweep 1548 -> 1588 (+40, measured together with the sibling intToFloat routing commit), aligned per-hash diff: 0 regressions. Differential run-sweep on the 40 gains: 0 diff, 0 nondet -- an inference change can miscompile rather than just fail, so this was the check that mattered. --- .../src/LibCompiler/passes/2_AST_to_ANF.fs | 36 +++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/backend/src/LibCompiler/passes/2_AST_to_ANF.fs b/backend/src/LibCompiler/passes/2_AST_to_ANF.fs index 39ddd562a8..73c6803457 100644 --- a/backend/src/LibCompiler/passes/2_AST_to_ANF.fs +++ b/backend/src/LibCompiler/passes/2_AST_to_ANF.fs @@ -1967,6 +1967,15 @@ let rec simpleInferType match simpleInferType thenExpr typeEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup, simpleInferType elseExpr typeEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup with | Some thenType, Some elseType when thenType = elseType -> Some thenType + // This pass runs AFTER typechecking, so the branches are already proven to + // have the same type. When one side is still an unresolved type variable -- + // e.g. `fun i -> if i < 0 then 0 else i`, where the lambda param carries a + // placeholder tvar -- the concrete side IS the type. Without this, such a + // lambda body fails with "could not infer return type". + | Some thenType, Some elseType when containsTypeVar elseType && not (containsTypeVar thenType) -> + Some thenType + | Some thenType, Some elseType when containsTypeVar thenType && not (containsTypeVar elseType) -> + Some elseType | _ -> None | AST.Match (scrutinee, cases) -> let scrutineeType = simpleInferType scrutinee typeEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup @@ -2008,6 +2017,33 @@ let rec simpleInferType else None | _ -> None + // Forms below are all trivially typed, but were falling through to None and + // failing lambda lifting with "could not infer return type" for any lambda + // whose body was e.g. a string interpolation or a list literal. + | AST.InterpolatedString _ -> Some AST.TString + | AST.UnaryOp (AST.Not, _) -> Some AST.TBool + | AST.UnaryOp ((AST.Neg | AST.BitNot), operand) -> + // Neg/BitNot preserve the operand's type. + simpleInferType operand typeEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup + | AST.RecordUpdate (recordExpr, _) -> + // `{ r with ... }` has r's type. + simpleInferType recordExpr typeEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup + | AST.ListLiteral (first :: _) -> + // Elements are homogeneous (the typechecker already enforced it), so the + // first element's type determines the list's. An empty literal carries no + // element type here, so it stays unknown. + simpleInferType first typeEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup + |> Option.map AST.TList + | AST.ListCons (headElements, tail) -> + // Prefer the tail: it's already a List. Fall back to the head elements. + match simpleInferType tail typeEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup with + | Some (AST.TList _ as listType) -> Some listType + | _ -> + match headElements with + | first :: _ -> + simpleInferType first typeEnv funcParams funcReturnTypes genericFuncDefs typeReg variantLookup + |> Option.map AST.TList + | [] -> None | _ -> None // Complex expressions require full type inference let inferLambdaReturnType (body: AST.Expr) (state: LiftState) : Result = From 300db142677c7636c20f8e5e605efd9813247aab Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 17:14:45 -0400 Subject: [PATCH 133/172] compiler: route int->float + sqrt to the compiler intrinsics intToFloat blocked 46 fns. The compiler has Stdlib.Int64.toFloat as a real intrinsic: 2_AST_to_ANF.fs lowers the name to ANF.Int64ToFloat -> MIR -> LIR -> x64 (6_CodeGen.fs), same shape as the Builtin.unwrap route. Equivalent by type: the bridge maps PT.TInt/TInt64 -> AST.TInt64 and PT.TFloat -> AST.TFloat64, so Dark`s intToFloat (TInt -> TFloat) and int64ToFloat (TInt64 -> TFloat) both ARE Int64.toFloat (Int64 -> Float64). floatSqrt -> Stdlib.Float.sqrt likewise. Verified: Float.toString(Int64.toFloat 7) compiles+runs -> "7.0"; a fn blocked on intToFloat now compiles. uint64ToFloat is deliberately NOT routed -- there is no native UInt64->Float intrinsic to route it to. Counted in the +40 / 0-regressions / 0-diffs measured with the sibling lambda lifting commit. --- backend/src/Builtins/Builtins.Compiler/Bridge.fs | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index c2a1c3f76d..2c2de22998 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -292,6 +292,13 @@ let builtinToStdlib : Map = "uint64Mod", "Stdlib.UInt64.mod" // Float "floatMultiply", "Stdlib.Float.multiply" + // Compiler INTRINSICS (2_AST_to_ANF.fs lowers these names to an ANF op -> + // MIR -> LIR -> x64), not stdlib fns. Equivalent by type: the bridge maps + // PT.TInt/TInt64 -> AST.TInt64 and PT.TFloat -> AST.TFloat64, so Dark's + // intToFloat (TInt -> TFloat) IS Int64.toFloat (Int64 -> Float64). + "intToFloat", "Stdlib.Int64.toFloat" + "int64ToFloat", "Stdlib.Int64.toFloat" + "floatSqrt", "Stdlib.Float.sqrt" // Int64 (full) "int64LessThan", "Stdlib.Int64.lessThan" "int64GreaterThan", "Stdlib.Int64.greaterThan" From b88d0af713236b8000cd08776c6b4b6ce290738a Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 17:26:57 -0400 Subject: [PATCH 134/172] compiler: applying a fn value unifies tvar params instead of demanding equality (+90) Applying a fn VALUE checked its args with typesEqual -- strict structural equality. A let-bound lambda keeps the parser`s placeholder tvar for its params, so `let n = fun i -> ... in n 5L` was rejected: "expected __interp_lambda_0_0_i, got Int64". The named-Call path already used typesCompatibleWithAliases (which unifies via matchTypes); only the Apply path lagged. Concrete mismatches still fail -- matchTypes only unifies type VARIABLES. This was hiding behind a badly misleading error. The "legacy interpreter errors" shim (checkFunctionDef) rewrites ANY inner TypeMismatch whose expected type is compatible with the fn`s return type into "`s return value expects X, but got Y" -- and prints funcDef.ReturnType, not the actual expected type. A tvar is compatible with everything, so `n 5L` (expected=TVar, got=Int64) surfaced as "String.slice`s return value expects String, but got Int64". The whole 128-fn "return value expects String" category was really this one Apply check, in argument position. Recovered the real context by temporarily un-dropping the TypeMismatch context string -> "function argument". Whole-tree sweep 1588 -> 1678 (+90, the largest jump this session): the single worst offender was Stdlib.String.slice, which alone gated 128 callers. Aligned per-hash diff: 0 regressions. Differential run-sweep on the 90 gains: 32 match, 0 nondet, and the 1 diff was NOT caused by this change -- see the next commit. --- backend/src/LibCompiler/passes/1.5_TypeChecking.fs | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/backend/src/LibCompiler/passes/1.5_TypeChecking.fs b/backend/src/LibCompiler/passes/1.5_TypeChecking.fs index e87a798fa6..13eeafdea1 100644 --- a/backend/src/LibCompiler/passes/1.5_TypeChecking.fs +++ b/backend/src/LibCompiler/passes/1.5_TypeChecking.fs @@ -4005,7 +4005,13 @@ let rec checkExprWithParamNames | arg :: restArgs, paramTy :: restParams -> checkExpr arg env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some paramTy) |> Result.bind (fun (argType, arg') -> - if typesEqual aliasReg argType paramTy then + // typesCompatibleWithAliases, not typesEqual: an applied fn VALUE + // often still carries type-variable params (a let-bound lambda's + // params keep the parser's placeholder tvar), and strict equality + // rejects `normalize(5)` as "expected 'a, got Int64". This matches + // what the named-Call path already does; concrete mismatches + // (String vs Int64) still fail, since matchTypes only unifies tvars. + if typesCompatibleWithAliases aliasReg paramTy argType then checkProvidedArgs restArgs restParams (arg' :: checkedArgs) else Error (TypeMismatch (paramTy, argType, "function argument"))) @@ -4039,7 +4045,9 @@ let rec checkExprWithParamNames | arg :: restArgs, paramTy :: restParams -> checkExpr arg env typeReg variantLookup genericFuncReg warningSettings moduleRegistry aliasReg (Some paramTy) |> Result.bind (fun (argType, arg') -> - if typesEqual aliasReg argType paramTy then + // See the partial-application branch above: a fn value's params can + // still be type variables, so unify rather than demand equality. + if typesCompatibleWithAliases aliasReg paramTy argType then checkArgs restArgs restParams (arg' :: checkedArgs) else Error (TypeMismatch (paramTy, argType, "function argument"))) From 9a5c722de05a0d6a1b5535af2a984c50558866c2 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 17:26:57 -0400 Subject: [PATCH 135/172] compiler: fix silent corruption of every List returned by an effectful builtin dvalToWire marshalled a DList as an opaque HANDLE id -- a leftover from the handle-model detour (motivated by the finger-tree "hang" that turned out to be a harness bug, and made unnecessary once native lists were proven to work). But TList marshalling was later re-enabled in rtToMarshalable, so the bridge decodes a List return with unmarshalTyped: split on "\n", unescape + decode each element. The daemon was sending "1" (the handle id) and the decoder read it back as a one-element list. Every effectful builtin returning a List silently returned garbage: Directory.list gave ["1"] instead of the 35 real entries. Marshal a DList the same way DTuple already does -- escaped elements joined by "\n" -- which is exactly the shape unmarshalTyped expects (empty string -> []). The __list* handle primitives call storeHandle directly, so they are unaffected (compilerListHandleSelfTest still returns 3). before: diff|c=["1"]|i=["scripts", "CODE-OF-CONDUCT.md", ...] after: match|["scripts", "CODE-OF-CONDUCT.md", ...] A compile-check could never have caught this -- the fn compiled fine and returned the wrong answer. Only the differential run-sweep surfaced it, and only once the sibling Apply fix let such a fn compile at all. --- .../src/Builtins/Builtins.Compiler/Libs/Compiler.fs | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index a02fd5d5d8..0fae6d60f1 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -531,7 +531,17 @@ let rec private dvalToWire (d : Dval) : string = | DEnum(_, _, _, caseName, []) -> caseName | DEnum(_, _, _, caseName, fields) -> caseName + "\n" + (fields |> List.map (dvalToWire >> escWire) |> String.concat "\n") - | DList _ -> string (storeHandle d) + // A list marshals as its escaped elements joined by "\n" (same shape as DTuple), + // which is exactly what Bridge.unmarshalTyped's TList decoder expects: split on + // "\n", unescape + decode each, empty string -> []. It used to store an opaque + // HANDLE here (a leftover from the handle-model detour, which the finger-tree + // misdiagnosis motivated and native lists made unnecessary). Since TList + // marshalling was re-enabled, that silently corrupted EVERY effectful builtin + // returning a List: the daemon sent the handle id and the decoder read it back + // as a one-element list, so `Directory.list` returned ["1"] instead of the + // actual entries. Found by the differential run-sweep, not by a compile check. + // The __list* handle primitives call storeHandle directly, so they're unaffected. + | DList(_, xs) -> xs |> List.map (dvalToWire >> escWire) |> String.concat "\n" | DTuple(a, b, rest) -> (a :: b :: rest) |> List.map (dvalToWire >> escWire) |> String.concat "\n" | DString s -> s From 02ba43ab9f3229ac1e3c5b71d643f1f71c4bc1fe Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 17:43:15 -0400 Subject: [PATCH 136/172] compiler: resolve sum-type variants scoped by their type (1678 -> 1883, +205) VariantLookup is Map -- keyed by the BARE variant name, built with Map.ofList. That assumes variant names are globally unique, which holds for the compiler`s own stdlib but not for a real package tree: Dark has many enums sharing names like Module, Error, NotFound. On a collision Map.ofList silently keeps the LAST one and drops the rest -- the information is gone, so no reader can recover it. Every reader then resolved by bare name, including two that HAD the sum type right there and ignored it: - TypeChecking Constructor: bound constrTypeName and never used it, so it checked the payload against whichever type won the collision. That is the bogus "Constructor Module does not take a payload" -- Module DOES take one, just not on the type that won. - AST_to_ANF Constructor: this is where the runtime TAG comes from. A losing collision here is a MISCOMPILE, not an error: the value gets another type`s tag. Nothing had caught it because the affected fns did not compile at all. Register each variant under a second, type-scoped key ("TypeName.VariantName") alongside the bare one, and resolve via tryFindVariant, which prefers the scoped entry and falls back to the bare name. Bare keys still collide exactly as before, so every existing bare lookup is byte-for-byte unchanged; only callers that know the type get the unambiguous answer. Match patterns still resolve bare -- a PConstructor carries no type name; scoping those needs the scrutinee type. Whole-tree sweep 1678 -> 1874 (typechecker) -> 1883 (ANF), the largest jump this session. Aligned per-hash diffs: 0 regressions at both steps. Differential run-sweep on the 196 + 9 gains: 0 diff, 0 nondet. Self-tests green; fib still matches the interpreter. --- .../LibCompiler/passes/1.5_TypeChecking.fs | 44 +++++++++++++++++-- .../src/LibCompiler/passes/2_AST_to_ANF.fs | 38 +++++++++++++--- 2 files changed, 72 insertions(+), 10 deletions(-) diff --git a/backend/src/LibCompiler/passes/1.5_TypeChecking.fs b/backend/src/LibCompiler/passes/1.5_TypeChecking.fs index 13eeafdea1..837e3dc8b4 100644 --- a/backend/src/LibCompiler/passes/1.5_TypeChecking.fs +++ b/backend/src/LibCompiler/passes/1.5_TypeChecking.fs @@ -418,8 +418,30 @@ type SumTypeRegistry = Map /// Variant lookup - maps variant names to (type name, type params, tag index, payload type) /// Type params are the generic type parameters of the containing sum type +/// +/// Every variant is registered twice: under its bare name, and under a type-scoped +/// key (see scopedVariantKey). Bare names are ambiguous whenever two sum types share +/// a variant name — the map keeps only the last — so anyone holding the type name +/// should resolve with tryFindVariant instead of a bare Map.tryFind. type VariantLookup = Map +/// The unambiguous key for a variant of a known sum type. +let scopedVariantKey (typeName: string) (variantName: string) : string = + typeName + "." + variantName + +/// Resolve a variant, preferring the type-scoped entry when the sum type is known +/// and falling back to the (possibly ambiguous) bare name. +let tryFindVariant + (variantLookup: VariantLookup) + (typeName: string option) + (variantName: string) + : (string * string list * int * Type option) option = + let scoped = + typeName |> Option.bind (fun tn -> Map.tryFind (scopedVariantKey tn variantName) variantLookup) + match scoped with + | Some _ -> scoped + | None -> Map.tryFind variantName variantLookup + /// Generic function registry and call-site policy controls. /// `Functions` contains entries only for functions that have type parameters. type GenericFuncRegistry = { @@ -3063,8 +3085,11 @@ let rec checkExprWithParamNames Error (GenericError $"Cannot access .{fieldName} on non-record type {typeToString other}")) | Constructor (constrTypeName, variantName, payload) -> - // Look up the variant to find its type and expected payload - match Map.tryFind variantName variantLookup with + // Look up the variant to find its type and expected payload. The constructor + // carries its sum type, so resolve scoped: a bare-name lookup silently picks + // whichever type happened to win the collision when two enums share a variant + // name, which reports a bogus payload arity (or resolves the wrong variant). + match tryFindVariant variantLookup (Some constrTypeName) variantName with | None -> Error (GenericError $"Unknown constructor: {variantName}") | Some (typeName, typeParams, _tag, expectedPayload) -> @@ -4647,6 +4672,16 @@ let private checkProgramInternal // Collect sum type definitions and build variant lookup from THIS program // Maps variant name -> (type name, type params, tag index, payload type) // Type params are included for generic type instantiation at constructor call sites + // + // Each variant is registered under TWO keys: its bare name (legacy — assumes + // variant names are globally unique, which holds for the compiler's own stdlib) + // and a type-scoped "TypeName.VariantName" key. Bare keys still collide and + // last-writer-wins exactly as before, so existing bare lookups are unchanged; + // but a caller that knows the type (a Constructor carries its type name) can + // resolve unambiguously via scopedVariantKey. This matters because a real + // package tree has many enums sharing variant names (Module, Error, NotFound), + // where the bare map silently drops all but one — surfacing as a bogus + // "Constructor X does not take a payload", or worse, the wrong variant tag. let programVariantLookup : VariantLookup = topLevels |> List.choose (function @@ -4655,7 +4690,10 @@ let private checkProgramInternal | _ -> None) |> List.collect (fun (typeName, typeParams, variants) -> variants - |> List.mapi (fun idx variant -> (variant.Name, (typeName, typeParams, idx, variant.Payload)))) + |> List.indexed + |> List.collect (fun (idx, variant) -> + let entry = (typeName, typeParams, idx, variant.Payload) + [ (variant.Name, entry); (scopedVariantKey typeName variant.Name, entry) ])) |> Map.ofList // Second pass: collect all function signatures from THIS program diff --git a/backend/src/LibCompiler/passes/2_AST_to_ANF.fs b/backend/src/LibCompiler/passes/2_AST_to_ANF.fs index 73c6803457..d1658b266a 100644 --- a/backend/src/LibCompiler/passes/2_AST_to_ANF.fs +++ b/backend/src/LibCompiler/passes/2_AST_to_ANF.fs @@ -1890,7 +1890,10 @@ let rec simpleInferType | _ -> None | AST.Constructor (typeName, variantName, payload) -> // Sum type constructor has the sum type; infer generic args from payload when possible. - match Map.tryFind variantName variantLookup with + // Resolve scoped by that type: a bare-name lookup picks whichever sum type won + // the collision when two enums share a variant name, which would infer against + // the wrong variant's payload. + match TypeChecking.tryFindVariant variantLookup (Some typeName) variantName with | Some (sumTypeName, typeParams, _, payloadPattern) -> let defaultTypeArgs = typeParams |> List.map AST.TVar match payloadPattern, payload with @@ -2475,9 +2478,16 @@ let rec liftLambdasInProgram | AST.TypeDef (AST.SumTypeDef (typeName, typeParams, variants)) -> Some (typeName, typeParams, variants) | _ -> None) + // Register each variant under both its bare name and a type-scoped key, so a + // caller that knows the sum type can resolve unambiguously when two enums + // share a variant name (see TypeChecking.scopedVariantKey / tryFindVariant). |> List.collect (fun (typeName, typeParams, variants) -> variants - |> List.mapi (fun idx variant -> (variant.Name, (typeName, typeParams, idx, variant.Payload)))) + |> List.indexed + |> List.collect (fun (idx, variant) -> + let entry = (typeName, typeParams, idx, variant.Payload) + [ (variant.Name, entry) + (TypeChecking.scopedVariantKey typeName variant.Name, entry) ])) |> Map.ofList let mergeMapsLocal m1 m2 = Map.fold (fun acc k v -> Map.add k v acc) m1 m2 @@ -3196,8 +3206,11 @@ let rec inferType (expr: AST.Expr) (typeEnv: Map) (typeReg: Ty Ok (List.item index elemTypes) | AST.TTuple _ -> Error $"Tuple index {index} out of bounds" | _ -> Error "Cannot access index on non-tuple type") - | AST.Constructor (_, variantName, payload) -> - match Map.tryFind variantName variantLookup with + | AST.Constructor (ctorTypeName, variantName, payload) -> + // Scoped by the constructor's own sum type where the AST carries one (it may + // be empty), so a variant name shared by two enums can't resolve to the wrong + // type. tryFindVariant falls back to the bare name when unscoped. + match TypeChecking.tryFindVariant variantLookup (Some ctorTypeName) variantName with | None -> Error $"Unknown constructor: {variantName}" | Some (typeName, typeParams, _, payloadPattern) -> @@ -4402,8 +4415,12 @@ let rec toANF (expr: AST.Expr) (varGen: ANF.VarGen) (env: VarEnv) (typeReg: Type | _ -> Error $"Cannot access field '{fieldName}' on non-record type") - | AST.Constructor (_, variantName, payload) -> - match Map.tryFind variantName variantLookup with + | AST.Constructor (ctorTypeName, variantName, payload) -> + // This is where the runtime TAG comes from, so an ambiguous bare-name lookup + // here is a miscompile, not just a bad error: two enums sharing a variant name + // would take the losing type's tag. Resolve scoped by the constructor's own sum + // type; tryFindVariant falls back to the bare name when the AST name is empty. + match TypeChecking.tryFindVariant variantLookup (Some ctorTypeName) variantName with | None -> Error $"Unknown constructor: {variantName}" | Some (typeName, _, tag, _) -> @@ -8757,9 +8774,16 @@ let buildRegistries | AST.SumTypeDef (typeName, typeParams, variants) -> Some (typeName, typeParams, variants) | _ -> None) + // Register each variant under both its bare name and a type-scoped key, so a + // caller that knows the sum type can resolve unambiguously when two enums + // share a variant name (see TypeChecking.scopedVariantKey / tryFindVariant). |> List.collect (fun (typeName, typeParams, variants) -> variants - |> List.mapi (fun idx variant -> (variant.Name, (typeName, typeParams, idx, variant.Payload)))) + |> List.indexed + |> List.collect (fun (idx, variant) -> + let entry = (typeName, typeParams, idx, variant.Payload) + [ (variant.Name, entry) + (TypeChecking.scopedVariantKey typeName variant.Name, entry) ])) |> Map.ofList let typeReg = expandTypeRegWithAliases typeRegBase aliasReg From 7062b08679085d2fac43ce50bf1bdb1cbae00371 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 17:58:58 -0400 Subject: [PATCH 137/172] compiler: String-keyed Dicts (the "Dict is Int64-keyed" gap was not real) TDict was the single biggest blocker (366 fns) and was written off as a semantic gap: "compiler Dict keys are Int64, Dark`s are String". That is false. The compiler`s Dict is key-generic over a HAMT -- Dict.get(dict, key: k) -- dispatching through __hash/__key_eq, and stdlib/__Hash.dark ships __hash_str (FNV-1a over UTF-8 bytes) and __key_eq_str, monomorphized per key type. Only the "K=Int64 for now" comment on AST.TDict was stale (fixed here). Dark`s PT.TDict carries just a value type because its keys are always String, which is exactly the compiler`s `k`. So: bridge PT.TDict v -> AST.TDict(TString, v), lower EDict via Stdlib.Dict. fromList over (key, value) tuples (the compiler AST has no dict literal; the list literal pins k=String and v, so no explicit type args needed), zero-synthesize a Dict param as TypeApp Dict.empty(), and teach the ref-walkers to recurse into EDict values. Routed only what is REALLY equivalent -- semantics, not just signatures. Three pairs looked routable and are NOT; each was checked rather than assumed: - dictSet: Dark RAISES if the key exists; native set overwrites. The real equivalent of native set is dictSetOverridingDuplicates. - dictFromList: Dark returns Option (None on duplicates); native returns a bare Dict, overwriting. Real equivalent: dictFromListOverwritingDuplicates. - dictKeys/dictValues/dictToList: ORDER DIFFERS. Dark`s Dict is an F# Map (key-sorted); the compiler`s is a HAMT (hash order). Measured: compiled ["apple","zebra","mango"] vs interpreted ["apple","mango","zebra"]. Routing the first two would have silently changed behaviour, and the third would have returned correctly-typed lists in the wrong order. Whole-tree sweep 1883 -> 1915. The TDict category is now 0: the other ~334 fns advanced to their next real blocker (unresolved package values, fileRead, payloadSize). Aligned per-hash diff: 0 regressions. Differential run-sweep on the 32 gains: 0 diff. Dict.size/contains/remove verified correct compiled. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 44 ++++++++++++++++++- .../Builtins.Compiler/Libs/Compiler.fs | 5 +++ backend/src/LibCompiler/AST.fs | 2 +- 3 files changed, 49 insertions(+), 2 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 2c2de22998..f084b6750c 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -290,6 +290,27 @@ let builtinToStdlib : Map = "uint64Multiply", "Stdlib.UInt64.mul" "uint64Divide", "Stdlib.UInt64.div" "uint64Mod", "Stdlib.UInt64.mod" + // Dict. Dark's key is always String, which is the compiler's `k`, and Dark's + // Option return IS the compiler's native Option (already unified). Only pairs + // whose SEMANTICS match are routed, not merely their signatures: + // + // NOT routed, and why (each was verified, not assumed): + // - dictSet: Dark RAISES if the key already exists; native Dict.set overwrites. + // `dictSetOverridingDuplicates` is the real equivalent of native set. + // - dictFromList: Dark returns Option (None on duplicate keys); native + // fromList overwrites and returns a bare Dict. fromListOverwritingDuplicates + // is the real equivalent. + // - dictKeys/dictValues/dictToList: ORDER DIFFERS. Dark's Dict is an F# Map + // (key-sorted iteration); the compiler's is a HAMT (hash order). Measured: + // compiled ["apple","zebra","mango"] vs interpreted ["apple","mango","zebra"]. + // - dictMerge: native merge is __mergeHelper(dict2, dict1) — the conflict + // winner needs proving before it can be called equivalent. + "dictGet", "Stdlib.Dict.get" + "dictMember", "Stdlib.Dict.contains" + "dictSize", "Stdlib.Dict.size" + "dictRemove", "Stdlib.Dict.remove" + "dictSetOverridingDuplicates", "Stdlib.Dict.set" + "dictFromListOverwritingDuplicates", "Stdlib.Dict.fromList" // Float "floatMultiply", "Stdlib.Float.multiply" // Compiler INTRINSICS (2_AST_to_ANF.fs lowers these names to an ANF op -> @@ -518,7 +539,12 @@ let rec bridgeType | PT.TList inner -> recurse inner |> Result.map AST.TList | PT.TTuple(a, b, rest) -> (a :: b :: rest) |> List.map recurse |> allOk |> Result.map AST.TTuple - | PT.TDict _ -> err "type" "TDict" + // Dark's Dict is always String-keyed (PT.TDict carries only a value type). The + // compiler's Dict IS key-generic -- Dict over a HAMT, with __hash and + // __key_eq monomorphized per key type, and __Hash.dark ships __hash_str + // (FNV-1a over UTF-8 bytes) + __key_eq_str. So String keys are fully supported; + // the "K=Int64 for now" note on AST.TDict is stale. + | PT.TDict v -> recurse v |> Result.map (fun v' -> AST.TDict(AST.TString, v')) | PT.TFn(args, ret) -> (NEList.toList args |> List.map recurse |> allOk, recurse ret) |> fun (a, r) -> @@ -898,6 +924,19 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = |> allOk |> Result.map (fun cs -> AST.Match(scrut, cs))) | PT.EList(_, elems) -> elems |> List.map recurse |> allOk |> Result.map AST.ListLiteral + // The compiler AST has no dict literal, so build one with Stdlib.Dict.fromList over + // a list of (key, value) tuples: the list literal pins k=String and v, so the call + // needs no explicit type args. An EMPTY dict literal pins nothing, and inference + // would have to come from context we don't have here, so it hard-fails cleanly + // rather than emitting a Dict the compiler can't monomorphize. + | PT.EDict(_, []) -> err "dict" "empty dict literal (no element type to infer)" + | PT.EDict(_, pairs) -> + pairs + |> List.map (fun (k, v) -> + recurse v |> Result.map (fun v' -> AST.TupleLiteral [ AST.StringLiteral k; v' ])) + |> allOk + |> Result.map (fun entries -> + AST.Call("Stdlib.Dict.fromList", AST.NonEmptyList.singleton (AST.ListLiteral entries))) | PT.ETuple(_, a, b, rest) -> (a :: b :: rest) |> List.map recurse |> allOk |> Result.map AST.TupleLiteral | PT.EPipe(_, lhs, parts) -> @@ -1189,6 +1228,7 @@ let rec referencedPackageFns (e : PT.Expr) : List = | PT.EPipeVariable(_, _, args) -> args |> List.collect r | PT.EPipeLambda(_, _, body) -> r body)) | PT.EList(_, elems) -> elems |> List.collect r + | PT.EDict(_, pairs) -> pairs |> List.collect (snd >> r) | PT.ETuple(_, a, b, rest) -> (a :: b :: rest) |> List.collect r | PT.ELambda(_, _, body) -> r body | PT.EStatement(_, first, next) -> r first @ r next @@ -1245,6 +1285,7 @@ let rec typeRefsInExpr (e : PT.Expr) : List = | PT.EPipeVariable(_, _, args) -> args |> List.collect r | PT.EPipeLambda(_, _, body) -> r body)) | PT.EList(_, elems) -> elems |> List.collect r + | PT.EDict(_, pairs) -> pairs |> List.collect (snd >> r) | PT.ETuple(_, a, b, rest) -> (a :: b :: rest) |> List.collect r | PT.ELambda(_, _, body) -> r body | PT.EStatement(_, first, next) -> r first @ r next @@ -1284,6 +1325,7 @@ let rec valueRefsInExpr (e : PT.Expr) : List = | PT.EIf(_, c, t, None) -> r c @ r t | PT.ELet(_, _, v, body) -> r v @ r body | PT.EList(_, elems) -> elems |> List.collect r + | PT.EDict(_, pairs) -> pairs |> List.collect (snd >> r) | PT.ETuple(_, a, b, rest) -> (a :: b :: rest) |> List.collect r | PT.ERecord(_, _, _, fields) -> fields |> List.collect (snd >> r) | PT.ERecordFieldAccess(_, record, _) -> r record diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 0fae6d60f1..2767e8dc24 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -434,6 +434,11 @@ let rec private zeroValue | AST.TTuple ts -> ts |> List.map (zeroValue defs seen) |> allOk |> Result.map AST.TupleLiteral | AST.TList _ -> Ok(AST.ListLiteral []) + // Dict.empty is nullary AND generic, so give it explicit type args (we know k/v + // here) rather than relying on inference from a call site that has none. The Unit + // arg is how the compiler spells a nullary call (normalizeNullaryCallArgs drops it). + | AST.TDict(k, v) -> + Ok(AST.TypeApp("Stdlib.Dict.empty", [ k; v ], AST.NonEmptyList.singleton AST.UnitLiteral)) | AST.TFunction(argTypes, retType) -> // A function param: synthesize a dummy lambda `(a0, a1, …) => ` // that ignores its args, so a higher-order fn can be made reachable. Param diff --git a/backend/src/LibCompiler/AST.fs b/backend/src/LibCompiler/AST.fs index 3664cccc9e..f270b06991 100644 --- a/backend/src/LibCompiler/AST.fs +++ b/backend/src/LibCompiler/AST.fs @@ -58,7 +58,7 @@ type Type = | TList of Type // List - polymorphic list type | TVar of string // type variable: T, A, B, etc. (for generics) | TRawPtr // Raw pointer to unmanaged memory (internal, for HAMT) - | TDict of keyType:Type * valueType:Type // Dict - HAMT dictionary (K=Int64 for now) + | TDict of keyType:Type * valueType:Type // Dict - HAMT dictionary; K is generic (Int64/Bool/String), monomorphized via __hash/__key_eq (see stdlib/__Hash.dark) /// Binary operators type BinOp = From cce571d1c9406255fa1fc113030536d8be3d472e Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 19:46:31 -0400 Subject: [PATCH 138/172] compiler: report WHY a package value did not bridge, + empty dict literals buildPieces dropped any package value whose body failed to bridge (| Error _ -> m) and never recorded why, so every fn referencing one failed with a useless "unsupported-value: package value not resolved". That was the #1 blocker at 307 fns -- one opaque bucket hiding a pile of unrelated causes. Thread the real error through (BridgeCtx.ValueErrors: re-bridge whatever never reached the fixpoint, once, to capture its actual failure) and report it. The bucket immediately split into: 194 never-fetched, 41 empty dict literals, 30 blobEmpty, 8 scmMainBranchId, 7 cliGetLogDir, 2 fileExists -- i.e. mostly small, nameable things rather than one wall. Also: an empty dict literal now emits a bare nullary Stdlib.Dict.empty() and lets the compiler infer k/v from context instead of hard-failing at the bridge. Most empty dicts ARE used somewhere that pins the types (+6). Sweep 1915 -> 1921, aligned per-hash diff: 0 regressions, 0 diffs on the gains. NOT included, deliberately: the fix for the 194. valueRefsInExpr is missing PT.EPipe (referencedPackageFns has it), so a value used inside a pipe is never seeded. The 12-line fix works -- and makes the bridge explode. Values are INLINED, not shared: bridgeExpr splices a value`s whole body in at every EValue, and valuesMap[A] already contains B`s body inlined, so value chains compound multiplicatively. With pipes resolving, one 50-fn sweep chunk hit 55GB RSS and nearly OOM`d the box -- while a single fn still compiled in ~5s, which is exactly why per-fn testing missed it. Value let-hoisting has to land first. The reasoning is left in a comment at the call site so the next attempt does not re-discover it the hard way. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 30 +++++++++++++++++-- .../Builtins.Compiler/Libs/Compiler.fs | 28 +++++++++++++++-- 2 files changed, 53 insertions(+), 5 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index f084b6750c..5d9714337d 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -55,6 +55,11 @@ type BridgeCtx = { Params : string[] Self : string Values : Map + /// Why a referenced package value ISN'T in `Values`. A value whose own body + /// fails to bridge is dropped, and every fn referencing it then failed with a + /// useless "package value not resolved" that hid the actual blocker. Carry the + /// real error so the fn reports the root cause instead of the symptom. + ValueErrors : Map /// Effectful builtins routable through the host RPC seam: name -> (per-arg /// wire types, return wire type). Built from the live runtime. Effectful : Map } @@ -902,7 +907,11 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = | PT.FQValueName.Package(PT.Hash h) -> match Map.tryFind h ctx.Values with | Some e -> Ok e - | None -> err "value" "package value not resolved" + | None -> + // Report why the value itself couldn't be bridged, not just that it's absent. + match Map.tryFind h ctx.ValueErrors with + | Some inner -> err "value" $"package value did not bridge: {inner}" + | None -> err "value" "package value not resolved" | PT.ESelf _ -> err "expr" "bare ESelf (self as a value)" // Higher-order application: apply a fn value (variable/lambda/expr) to args. | PT.EApply(_, funcExpr, typeArgs, args) -> @@ -929,7 +938,12 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = // needs no explicit type args. An EMPTY dict literal pins nothing, and inference // would have to come from context we don't have here, so it hard-fails cleanly // rather than emitting a Dict the compiler can't monomorphize. - | PT.EDict(_, []) -> err "dict" "empty dict literal (no element type to infer)" + // An empty dict literal pins no types, so emit a bare nullary Dict.empty() and let + // the compiler infer k/v from context (the Unit arg is how it spells a nullary + // call). If context doesn't pin them it fails there instead — still better than + // hard-failing here, since most empty dicts ARE used somewhere that pins them. + | PT.EDict(_, []) -> + Ok(AST.Call("Stdlib.Dict.empty", AST.NonEmptyList.singleton AST.UnitLiteral)) | PT.EDict(_, pairs) -> pairs |> List.map (fun (k, v) -> @@ -1138,6 +1152,7 @@ let rec freeTVars (t : AST.Type) : Set = let bridgeFn (types : Map) (values : Map) + (valueErrors : Map) (effectful : Map) (compiledName : string) (fn : PT.PackageFn.PackageFn) @@ -1148,6 +1163,7 @@ let bridgeFn { Params = paramNames Self = compiledName Values = values + ValueErrors = valueErrors Effectful = effectful } let bridgedParams = paramList @@ -1313,6 +1329,16 @@ let typeRefsInTypeDef (pt : PT.PackageType.PackageType) : List = let rec valueRefsInExpr (e : PT.Expr) : List = let r = valueRefsInExpr match e with + // NB: EPipe is deliberately NOT walked here yet, even though referencedPackageFns + // walks it and its absence is a real bug: a package value used inside a pipe is + // never seeded, never fetched, and every fn touching it fails "package value not + // resolved" (~194 fns — the bulk of that bucket). Adding it is a 12-line change + // and it WORKS, but it is unusable until values are shared instead of inlined: + // bridgeExpr inlines a value's whole body at every EValue, and valuesMap[A] + // already contains B's body inlined, so chains of values compound. With pipes + // resolving, a single 50-fn sweep chunk reached 55GB RSS and nearly OOM'd the + // box (one fn alone is fine, ~5s). Land value let-hoisting first, then re-add + // this and re-measure. See the "value inlining" task. | PT.EValue(_, nr) -> match nr.resolved with | Ok resolved -> diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 2767e8dc24..8eee31cbe8 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -279,7 +279,12 @@ let private buildPieces ||> List.fold (fun m (h, pv) -> if Map.containsKey h m then m else - let ctx : Bridge.BridgeCtx = { Params = [||]; Self = ""; Values = m; Effectful = Map.empty } + let ctx : Bridge.BridgeCtx = + { Params = [||] + Self = "" + Values = m + ValueErrors = Map.empty + Effectful = Map.empty } match Bridge.bridgeExpr ctx pv.body with | Ok e -> Map.add h e m | Error _ -> m) @@ -287,9 +292,26 @@ let private buildPieces let m' = bridgeValuesOnce m if Map.count m' = Map.count m then m' else fixpoint m' let valuesMap = fixpoint Map.empty + // Whatever never reached the fixpoint failed for a REASON; re-bridge those + // once against the final map to capture it, so a fn referencing one reports + // the root cause rather than a bare "package value not resolved". + let valueErrors : Map = + values + |> List.filter (fun (h, _) -> not (Map.containsKey h valuesMap)) + |> List.choose (fun (h, pv) -> + let ctx : Bridge.BridgeCtx = + { Params = [||] + Self = "" + Values = valuesMap + ValueErrors = Map.empty + Effectful = Map.empty } + match Bridge.bridgeExpr ctx pv.body with + | Error e -> Some(h, e) + | Ok _ -> None) + |> Map.ofList let fnDefs = fns - |> List.map (fun (h, fn) -> Bridge.bridgeFn typeEnv valuesMap effectful (Bridge.nameFor h) fn) + |> List.map (fun (h, fn) -> Bridge.bridgeFn typeEnv valuesMap valueErrors effectful (Bridge.nameFor h) fn) |> allOk match typeDefs, fnDefs with | Error e, _ -> return Error e @@ -1108,7 +1130,7 @@ let fns () : List = [ { name = "b"; typ = PT.TInt64; description = "" } ] returnType = PT.TInt64 description = "" } - match Bridge.bridgeFn Map.empty Map.empty Map.empty "bridgedFn" ptFn with + match Bridge.bridgeFn Map.empty Map.empty Map.empty Map.empty "bridgedFn" ptFn with | Error e -> outcome false $"bridge: {e}" |> Ply | Ok fd -> let program : AST.Program = From 0d4277fcf08b56aea03483ec59ff1fc4649241e7 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 20:12:15 -0400 Subject: [PATCH 139/172] compiler: record why the package-value/pipe fix cannot land yet Comment-only. The EPipe omission in valueRefsInExpr is the root cause of the #1 blocker (~307 fns: a package value used inside a pipe is never seeded, so every fn touching it fails "package value not resolved"), and the fix is 12 obvious lines -- so leave the evidence at the call site rather than let the next attempt rediscover it by nearly OOM-ing the box. Measured all three combinations: inlined + pipes -> 55GB on a 50-fn batch let-shared per fn + pipes -> 23GB on a 25-fn batch (chains gone, N x M remains) let-shared per fn, no pipes -> incorrect: unbound `Var __val_h` (-2 fns), because EValue emits the Var while the Let is only emitted for refs this walker sees So per-fn let-sharing is COUPLED to this walker and insufficient either way. A value has to be emitted once per PROGRAM, which needs a nullary FunctionDef, which needs a ReturnType that PT.PackageValue does not carry. The route worth trying: a package value is a constant -- evaluate it to a Dval, take the type from that, emit one shared nullary fn. Also worth knowing: per-fn testing cannot catch this. A single fn compiles in ~5s; the blowup only shows as RSS across a batch. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 30 ++++++++++++------- 1 file changed, 20 insertions(+), 10 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 5d9714337d..72c0406c3d 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -1329,16 +1329,26 @@ let typeRefsInTypeDef (pt : PT.PackageType.PackageType) : List = let rec valueRefsInExpr (e : PT.Expr) : List = let r = valueRefsInExpr match e with - // NB: EPipe is deliberately NOT walked here yet, even though referencedPackageFns - // walks it and its absence is a real bug: a package value used inside a pipe is - // never seeded, never fetched, and every fn touching it fails "package value not - // resolved" (~194 fns — the bulk of that bucket). Adding it is a 12-line change - // and it WORKS, but it is unusable until values are shared instead of inlined: - // bridgeExpr inlines a value's whole body at every EValue, and valuesMap[A] - // already contains B's body inlined, so chains of values compound. With pipes - // resolving, a single 50-fn sweep chunk reached 55GB RSS and nearly OOM'd the - // box (one fn alone is fine, ~5s). Land value let-hoisting first, then re-add - // this and re-measure. See the "value inlining" task. + // NB: EPipe is deliberately NOT walked here, even though referencedPackageFns walks + // it and its absence IS a real bug: a package value used inside a pipe is never + // seeded, never fetched, and every fn touching it fails "unsupported-value: package + // value not resolved" (~307 fns — the #1 blocker). The fix is 12 lines and correct. + // It still can't land, because bridgeExpr INLINES a value's whole body at every + // EValue and valuesMap[A] already contains B's body inlined, so value chains + // compound multiplicatively. All three combinations were measured: + // inlined + pipes -> 55GB on a 50-fn batch (nearly OOM'd the box) + // let-shared per fn + pipes -> 23GB on a 25-fn batch (chains gone, but the + // remaining N-fns x M-values duplication is fatal) + // let-shared per fn, no pipes -> WRONG: EValue emits `Var __val_h` while the Let + // is only emitted for refs THIS walker sees, so a + // pipe-referenced value becomes an unbound var (-2) + // So per-fn sharing is coupled to this walker, and isn't sufficient regardless: a + // value must be emitted ONCE PER PROGRAM. That needs a nullary FunctionDef, which + // needs a ReturnType, which PT.PackageValue ({ hash; description; body }) lacks. + // Route worth trying: a package value is a CONSTANT — evaluate it in the runtime to + // a Dval, take the type from the Dval, emit one shared nullary fn (or a literal), + // and only THEN add EPipe here and re-measure. Per-fn testing will not catch the + // blowup (a single fn compiles in ~5s); watch RSS across a batch. | PT.EValue(_, nr) -> match nr.resolved with | Ok resolved -> From be5af7d87cabe08633cfcc75e6399d43196d9372 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 20:48:37 -0400 Subject: [PATCH 140/172] compiler: lambda lifting can infer match-bodies (1921 -> 1977, +56) `fun op -> match op with ...` -- a lambda whose body is a match, which is everywhere in real code -- failed with "Lambda lifting could not infer return type for lambda body". Same root cause as the If case fixed earlier, one level up: simpleInferType`s Match arm demanded every arm infer to an EXACTLY equal type. A lambda param carries the parser`s placeholder tvar, so an arm returning it gives TVar while its siblings give Int64/String -> not equal -> None -> lifting fails. This pass runs AFTER typechecking, so the arms are already proven to share a type: arms that are still unresolved tvars carry no information, and if the CONCRETE arms agree, that is the type. Whole-tree sweep 1921 -> 1977, aligned per-hash diff: 0 regressions. Differential run-sweep on the gains: 16 byte-identical matches, 0 diff, 0 nondet -- the check that matters, since an inference change can miscompile rather than merely fail. --- backend/src/LibCompiler/passes/2_AST_to_ANF.fs | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/backend/src/LibCompiler/passes/2_AST_to_ANF.fs b/backend/src/LibCompiler/passes/2_AST_to_ANF.fs index d1658b266a..9e1c6e7238 100644 --- a/backend/src/LibCompiler/passes/2_AST_to_ANF.fs +++ b/backend/src/LibCompiler/passes/2_AST_to_ANF.fs @@ -1998,7 +1998,17 @@ let rec simpleInferType let types = caseTypes |> List.choose id match types with | first :: rest when rest |> List.forall (fun t -> t = first) -> Some first - | _ -> None + | _ -> + // Same rationale as the If case above: this pass runs AFTER + // typechecking, so every arm already has the same type. Arms that are + // still unresolved type variables (a lambda param's placeholder tvar) + // carry no information; if the CONCRETE arms agree, that's the type. + // Without this, `fun op -> match op with ...` — a lambda whose body is + // a match, which is everywhere — fails to lift. + match types |> List.filter (containsTypeVar >> not) with + | concrete :: restConcrete when restConcrete |> List.forall (fun t -> t = concrete) -> + Some concrete + | _ -> None else None | AST.Lambda (parameters, body) -> From 593dd871d82f16854e4d63557a7280db15273a8b Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 20:58:51 -0400 Subject: [PATCH 141/172] compiler: a fn passed as a VALUE now resolves (1977 -> 1987) "Undefined variable: fn." (45 fns) was three stacked bugs in the path for a package fn used as a value (passed to a higher-order fn) rather than called. Each fix exposed the next: 1. referencedPackageFns only matched EApply(EFnName ...) -- i.e. CALL position. A bare EFnName fell through to `| _ -> []`, so the callee`s def was never fetched, while the bridge still emitted a reference to it -> dangling name. (Same class as the EPipe gap in valueRefsInExpr, but safe to fix: fns are emitted once as FunctionDefs and shared by name, unlike values, which are inlined.) 2. The bridge lowered a bare fn-ref to a captureless Closure, but the typechecker treats a Closure`s FIRST param as the captured environment and drops it (`TFunction(restParams, ret)`) -- wrong for a plain top-level fn, giving "Type mismatch in closure fn.". AST.FuncRef exists for exactly this and types as the fn`s full signature. 3. FuncRef then compared `expected <> funcType` -- structural equality. Passing a fn to a higher-order fn gives an expected type full of type variables, which is never EQUAL to the concrete signature. Unify with typesCompatibleWithAliases instead (matchTypes still rejects real mismatches). This is the same trap as the Apply arg check, and now the fourth instance of "= where unification was needed". Routed stdlib fns get their native name here too, since their Dark defs are deliberately not bridged. Sweep 1977 -> 1987, 0 regressions, 0 diffs on the gains. The rest of the 45 advance to the generic-types wall ("payloadSize: Record type T not found"), which is next. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 28 +++++++++++++++++-- .../LibCompiler/passes/1.5_TypeChecking.fs | 7 ++++- 2 files changed, 32 insertions(+), 3 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 72c0406c3d..6b9a67efa4 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -996,10 +996,20 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = | Error _ -> err "fnref" "unresolved fn name" | Ok resolved -> match resolved.name with - | PT.FQFnName.Package(PT.Hash h) -> Ok(AST.Closure(nameFor h, [])) + // FuncRef, not a captureless Closure: the typechecker treats a Closure's FIRST + // param as the captured environment and drops it (`TFunction(restParams, ret)`), + // which is wrong for a plain top-level fn — it produced "Type mismatch in + // closure fn.". FuncRef types as the fn's full signature. + // A stdlib fn we route natively has no bridged def to point at, so its function + // VALUE must name the native fn too (referencedPackageFns skips routed fns, so + // a ref to fn. here would dangle). + | PT.FQFnName.Package(PT.Hash h) -> + match routeResolved resolved with + | Some nativeName -> Ok(AST.FuncRef nativeName) + | None -> Ok(AST.FuncRef(nameFor h)) | PT.FQFnName.Builtin b -> match Map.tryFind b.name builtinToStdlib with - | Some stdlibFn -> Ok(AST.Closure(stdlibFn, [])) + | Some stdlibFn -> Ok(AST.FuncRef stdlibFn) | None -> err "fnref" $"effectful builtin as value: {b.name}" | _ -> err "expr" (e.GetType().Name) @@ -1221,6 +1231,20 @@ let rec referencedPackageFns (e : PT.Expr) : List = | PT.FQFnName.Builtin _ -> [] | Error _ -> [] here @ (args |> NEList.toList |> List.collect r) + // A fn used as a VALUE (passed to a higher-order fn, not called here) still needs + // its definition compiled in: the bridge lowers it to a captureless Closure over + // the bridged name. Only the CALL-position case above existed, so a bare fn-ref fell + // through to `| _ -> []`, its def was never fetched, and the Closure dangled — + // "Undefined variable: fn." (45 fns). Unlike package VALUES, fns are emitted + // once as FunctionDefs and shared by name, so pulling these in costs nothing. + | PT.EFnName(_, nr) -> + match nr.resolved with + | Ok resolved when Option.isSome (routeResolved resolved) -> [] + | Ok resolved -> + match resolved.name with + | PT.FQFnName.Package(PT.Hash h) -> [ h ] + | PT.FQFnName.Builtin _ -> [] + | Error _ -> [] | PT.EString(_, segs) -> segs |> List.collect (fun s -> match s with PT.StringInterpolation e -> r e | PT.StringText _ -> []) | PT.ERecordUpdate(_, record, ups) -> diff --git a/backend/src/LibCompiler/passes/1.5_TypeChecking.fs b/backend/src/LibCompiler/passes/1.5_TypeChecking.fs index 837e3dc8b4..abffde217b 100644 --- a/backend/src/LibCompiler/passes/1.5_TypeChecking.fs +++ b/backend/src/LibCompiler/passes/1.5_TypeChecking.fs @@ -4091,7 +4091,12 @@ let rec checkExprWithParamNames match Map.tryFind funcName env with | Some funcType -> match expectedType with - | Some expected when expected <> funcType -> + // typesCompatibleWithAliases, not (<>): passing a fn as a value to a + // higher-order fn gives an expected type full of type variables (e.g. + // `(a) -> b`), which is never structurally EQUAL to the concrete fn's + // signature. Unify instead — matchTypes still rejects real mismatches. + // Same trap as the Apply/arg check. + | Some expected when not (typesCompatibleWithAliases aliasReg expected funcType) -> Error (TypeMismatch (expected, funcType, $"function reference {funcName}")) | _ -> Ok (funcType, expr) | None -> From a92b56925a64689f75675b311455765ee9f3bdf5 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 21:44:15 -0400 Subject: [PATCH 142/172] =?UTF-8?q?compiler:=20dotted=20type=20names=20?= =?UTF-8?q?=E2=80=94=20"T=5F"=20was=20parsed=20as=20the=20type=20nam?= =?UTF-8?q?ed=20"T"?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit "Compilation failed: payloadSize: Record type T not found in typeReg" (98 fns) plus much of "unsupported-type: TCustomType" (91) came from the bridge naming types `T_`. The compiler mangles a type into a specialized fn`s name and parses it back with `mangled.Split(_)` (tryParseMangledType), so `T_` came back as the type named "T" -> TRecord("T", []) -> not in typeReg -> crash. The underscore in our name collides with the compiler`s mangling separator. Name them `T.` instead. Safe for the same reason nameFor`s dot is: the compiler`s own type names are already dotted and underscore-free (Stdlib.Option.Option), so they round-trip as a single token. This is the SECOND instance of the same root cause — the compiler reads meaning out of names, and ours were misread. The first was `fn_` being treated as a "local user-defined generic" whose type args it refused to infer (+121). Worth remembering before diagnosing the next "deep compiler limitation". Measured on the 189 fns blocked by payloadSize/TCustomType (the full-tree sweep is impractical here: these newly-compiling generic fns produce very large programs — one binary is 276KB — and a 50-fn chunk now grinds for 20+ min at 26GB): - 29 of the first 30 previously-blocked fns now compile - 250/250 random currently-compiling fns still compile (0 regressions) - differential on the 29: 5 byte-identical matches, 0 diff, 0 nondet Self-tests green; fib still matches the interpreter. --- backend/src/Builtins/Builtins.Compiler/Bridge.fs | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 6b9a67efa4..336cd2ae06 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -87,7 +87,14 @@ let private allOk (results : List>) : Result, string // internal Map keys (never emitted as assembler text), so it's // codegen-safe and normalizes to the same binary. let nameFor (hash : string) : string = "fn." + hash -let nameForType (hash : string) : string = "T_" + hash +// Dotted, NOT "T_": the compiler mangles a type into a specialized fn's name +// and parses it back with `mangled.Split('_')` (tryParseMangledType). An underscore +// in our name collides with that separator, so `T_` came back as the type named +// "T" -> `TRecord("T", [])` -> "payloadSize: Record type 'T' not found in typeReg". +// A dot is safe for the same reason it is in nameFor: the compiler's own type names +// are already dotted (Stdlib.Option.Option) and contain no underscore, so they +// round-trip as a single token. +let nameForType (hash : string) : string = "T." + hash // Pure Darklang stdlib fns for which the compiler ships a REALLY-equivalent native // implementation. A call to one is emitted as a call to the compiler's native fn, From 97a14e4628c6110605ff621853a3333c0962a003 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 22:51:15 -0400 Subject: [PATCH 143/172] compiler: share package values as nullary fns, typed from their Dval This kills the value-inlining blowup and finally lets valueRefsInExpr walk pipes. The bridge INLINED a package value`s body at every EValue, and a value`s stored body already had its own dependencies inlined into it -- so A gets spliced into C with B already inside it, and down a chain the copies MULTIPLY. The bodies are tiny (all 417 package values total 133KB; mean 319 bytes, max 6.5KB) -- it was never big values, it was 2^depth copies of small ones. Adding EPipe to the walker resolved enough extra references to make that visible: 55GB on a 50-fn batch. Fix: a package value is a CONSTANT, and the runtime already evaluates and caches it (package_values.rt_dval; all 417 populated). So ask the RT package manager for the Dval, take the TYPE from it -- which is exactly what previously made this impossible, since PT.PackageValue carries no declared type and FunctionDef requires a ReturnType -- and emit each value ONCE as `def __val.(__unit: Unit) : T = `. Every EValue becomes a call. BridgeCtx.Values is now a Set: only membership matters, the body never travels. An empty container (`let empty = []`) genuinely has no element type, so rather than guess one it emits a GENERIC value fn (`def __val.() : List = []`) and each call site infers -- which is what an empty literal should do anyway. That alone took "value did not bridge" from 105 to 4. With values shared, EPipe finally lands: the ~307-fn "package value not resolved" bucket is GONE -- a value used inside a pipe is now seeded and fetched. Measured (chunked sweeps kept corrupting -- see below -- so this is sampled): - the 50-fn batch that hit 55GB: now 4.2GB, WITH pipes enabled - one fn in isolation: ~0.00GB (the 4.2GB is 50 compiles of un-returned .NET heap, not per-fn cost; GC.Collect() changes nothing -- collecting is not decommitting) - 250/250 random currently-compiling fns still compile: 0 regressions - of 40 previously value-blocked fns, 4 now compile (~10% -> roughly +22 of 225); the rest advance to REAL blockers -- 24 of 40 are altJsonFormat, an effectful builtin that needs marshalling - differential on the new ones: match, 0 diffs -- the Dval-reconstructed literals give the same answers - self-tests green; fib still matches the interpreter The coverage delta is modest; the point is the architecture (values are 133KB once, not 2^depth) and that the #1 bucket dissolved into nameable causes. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 64 +++--- .../Builtins.Compiler/Libs/Compiler.fs | 197 ++++++++++++++---- 2 files changed, 199 insertions(+), 62 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 336cd2ae06..a2224ed55a 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -54,7 +54,10 @@ type WireRet = type BridgeCtx = { Params : string[] Self : string - Values : Map + /// Package values available as shared nullary fns (see Compiler.valueFnDef). + /// Only membership matters — an EValue lowers to a CALL of that fn, so the + /// body itself never travels through here (that inlining is what exploded). + Values : Set /// Why a referenced package value ISN'T in `Values`. A value whose own body /// fails to bridge is dropped, and every fn referencing it then failed with a /// useless "package value not resolved" that hid the actual blocker. Carry the @@ -96,6 +99,13 @@ let nameFor (hash : string) : string = "fn." + hash // round-trip as a single token. let nameForType (hash : string) : string = "T." + hash +/// A package value is emitted ONCE as a shared nullary fn (see Compiler.valueFnDef) +/// and every reference calls it. Previously each EValue spliced the value's whole +/// bridged body in, and since a value's body contains its dependencies' bodies, +/// chains compounded multiplicatively — 55GB on a 50-fn batch. Dotted for the same +/// reason as nameFor/nameForType: the compiler mangles names and splits them on '_'. +let valueFnName (hash : string) : string = "__val." + hash + // Pure Darklang stdlib fns for which the compiler ships a REALLY-equivalent native // implementation. A call to one is emitted as a call to the compiler's native fn, // and its Dark definition is NOT bridged. This is deliberately restricted to fns @@ -603,6 +613,12 @@ let private bridgeInfix (op : PT.Infix) : Result = /// Multi-field enum payloads / record constructions become a single tuple /// payload on the compiler side (its Constructor takes one optional payload). +let tuplePayloadPublic (xs : List) : AST.Expr option = + match xs with + | [] -> None + | [ x ] -> Some x + | many -> Some(AST.TupleLiteral many) + let private tuplePayload (xs : List) : AST.Expr option = match xs with | [] -> None @@ -912,9 +928,11 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = match resolved.name with | PT.FQValueName.Builtin b -> err "value-builtin" b.name | PT.FQValueName.Package(PT.Hash h) -> - match Map.tryFind h ctx.Values with - | Some e -> Ok e - | None -> + if Set.contains h ctx.Values then + // Call the shared nullary fn rather than splicing the value's body in here. + // The Unit arg is how the compiler spells a nullary call. + Ok(AST.Call(valueFnName h, AST.NonEmptyList.singleton AST.UnitLiteral)) + else // Report why the value itself couldn't be bridged, not just that it's absent. match Map.tryFind h ctx.ValueErrors with | Some inner -> err "value" $"package value did not bridge: {inner}" @@ -1168,7 +1186,7 @@ let rec freeTVars (t : AST.Type) : Set = /// any by-name refs both resolve). Generics are not yet supported. let bridgeFn (types : Map) - (values : Map) + (values : Set) (valueErrors : Map) (effectful : Map) (compiledName : string) @@ -1360,26 +1378,22 @@ let typeRefsInTypeDef (pt : PT.PackageType.PackageType) : List = let rec valueRefsInExpr (e : PT.Expr) : List = let r = valueRefsInExpr match e with - // NB: EPipe is deliberately NOT walked here, even though referencedPackageFns walks - // it and its absence IS a real bug: a package value used inside a pipe is never - // seeded, never fetched, and every fn touching it fails "unsupported-value: package - // value not resolved" (~307 fns — the #1 blocker). The fix is 12 lines and correct. - // It still can't land, because bridgeExpr INLINES a value's whole body at every - // EValue and valuesMap[A] already contains B's body inlined, so value chains - // compound multiplicatively. All three combinations were measured: - // inlined + pipes -> 55GB on a 50-fn batch (nearly OOM'd the box) - // let-shared per fn + pipes -> 23GB on a 25-fn batch (chains gone, but the - // remaining N-fns x M-values duplication is fatal) - // let-shared per fn, no pipes -> WRONG: EValue emits `Var __val_h` while the Let - // is only emitted for refs THIS walker sees, so a - // pipe-referenced value becomes an unbound var (-2) - // So per-fn sharing is coupled to this walker, and isn't sufficient regardless: a - // value must be emitted ONCE PER PROGRAM. That needs a nullary FunctionDef, which - // needs a ReturnType, which PT.PackageValue ({ hash; description; body }) lacks. - // Route worth trying: a package value is a CONSTANT — evaluate it in the runtime to - // a Dval, take the type from the Dval, emit one shared nullary fn (or a literal), - // and only THEN add EPipe here and re-measure. Per-fn testing will not catch the - // blowup (a single fn compiles in ~5s); watch RSS across a batch. + // Values are SHARED nullary fns now (see valueFnName), not inlined, so walking + // pipes here is finally safe. It is also required: referencedPackageFns walks + // pipes and this must agree, or a package value used inside a pipe is never + // seeded, never fetched, and every fn touching it fails "package value not + // resolved" (~307 fns — the #1 blocker). While values were inlined, adding this + // compounded value chains and hit 55GB on a 50-fn batch. + | PT.EPipe(_, lhs, parts) -> + r lhs + @ (parts + |> List.collect (fun p -> + match p with + | PT.EPipeFnCall(_, _, _, args) -> args |> List.collect r + | PT.EPipeInfix(_, _, e) -> r e + | PT.EPipeEnum(_, _, _, fields) -> fields |> List.collect r + | PT.EPipeVariable(_, _, args) -> args |> List.collect r + | PT.EPipeLambda(_, _, body) -> r body)) | PT.EValue(_, nr) -> match nr.resolved with | Ok resolved -> diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 8eee31cbe8..d64c54afed 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -212,6 +212,145 @@ let private buildEffectfulMap | _ -> None) |> Map.ofList +// --------------------------------------------------------------------------- +// Package values as SHARED nullary fns. +// +// A package value is a CONSTANT, and the runtime already evaluates and caches it +// (package_values.rt_dval — all 417 are populated), so we can ask the RT package +// manager for its Dval and emit the value ONCE as `def __val.() : T = `, +// referenced by a call. That replaces inlining the value's bridged body at every +// EValue, which compounded multiplicatively down value chains (a value's body +// contains its dependencies' bodies) and hit 55GB on a 50-fn batch. +// +// Taking the type from the Dval is the point: PT.PackageValue carries no declared +// type, which is what blocked emitting a nullary FunctionDef (ReturnType is required). +// --------------------------------------------------------------------------- + +let private typeNameHash (t : FQTypeName.FQTypeName) : Result = + match t with + | FQTypeName.Package(Hash h) -> Ok h + +/// A runtime ValueType -> the compiler type it denotes. `fresh` supplies a type-var +/// name for an Unknown: an EMPTY container (`let empty = []`) genuinely has no +/// element type, and guessing one would mis-type every use site. Emitting a TVar +/// instead makes the value fn GENERIC (`def __val.() : List = []`) so each +/// call site infers it — which is exactly what an empty literal should do. +let rec private valueTypeToAst (fresh : unit -> string) (vt : ValueType) : Result = + let valueTypeToAst = valueTypeToAst fresh + match vt with + | ValueType.Unknown -> Ok(AST.TVar(fresh ())) + | ValueType.Known kt -> + match kt with + | KTUnit -> Ok AST.TUnit + | KTBool -> Ok AST.TBool + | KTInt8 -> Ok AST.TInt8 + | KTUInt8 -> Ok AST.TUInt8 + | KTInt16 -> Ok AST.TInt16 + | KTUInt16 -> Ok AST.TUInt16 + | KTInt32 -> Ok AST.TInt32 + | KTUInt32 -> Ok AST.TUInt32 + | KTInt64 -> Ok AST.TInt64 + | KTUInt64 -> Ok AST.TUInt64 + | KTInt128 -> Ok AST.TInt128 + | KTUInt128 -> Ok AST.TUInt128 + | KTInt -> Ok AST.TInt64 // Dark's Int bridges to Int64, same as PT.TInt + | KTFloat -> Ok AST.TFloat64 + | KTChar -> Ok AST.TChar + | KTString -> Ok AST.TString + | KTList inner -> valueTypeToAst inner |> Result.map AST.TList + | KTDict v -> valueTypeToAst v |> Result.map (fun v' -> AST.TDict(AST.TString, v')) + | KTTuple(a, b, rest) -> + (a :: b :: rest) |> List.map valueTypeToAst |> allOk |> Result.map AST.TTuple + | KTCustomType(name, targs) -> + typeNameHash name + |> Result.bind (fun h -> + targs + |> List.map valueTypeToAst + |> allOk + |> Result.map (fun args -> + // Enums are TSum, records TRecord; Option/Result map to the native names. + if Bridge.isNativeType h then AST.TSum(Bridge.compilerTypeName h, args) + else AST.TRecord(Bridge.nameForType h, args))) + | other -> Error $"value-type: {other}" + +/// A package value's evaluated Dval -> a compiler literal. +let rec private dvalToAst (d : Dval) : Result = + match d with + | DUnit -> Ok AST.UnitLiteral + | DBool b -> Ok(AST.BoolLiteral b) + | DInt8 n -> Ok(AST.Int8Literal n) + | DUInt8 n -> Ok(AST.UInt8Literal n) + | DInt16 n -> Ok(AST.Int16Literal n) + | DUInt16 n -> Ok(AST.UInt16Literal n) + | DInt32 n -> Ok(AST.Int32Literal n) + | DUInt32 n -> Ok(AST.UInt32Literal n) + | DInt64 n -> Ok(AST.Int64Literal n) + | DUInt64 n -> Ok(AST.UInt64Literal n) + | DInt128 n -> Ok(AST.Int128Literal n) + | DUInt128 n -> Ok(AST.UInt128Literal n) + | DInt n -> Ok(AST.Int64Literal(int64 (DarkInt.toBigInt n))) + | DFloat f -> Ok(AST.FloatLiteral f) + | DChar c -> Ok(AST.CharLiteral c) + | DString s -> Ok(AST.StringLiteral s) + | DList(_, xs) -> xs |> List.map dvalToAst |> allOk |> Result.map AST.ListLiteral + | DTuple(a, b, rest) -> + (a :: b :: rest) |> List.map dvalToAst |> allOk |> Result.map AST.TupleLiteral + | DDict(_, entries) -> + // No dict literal in the compiler AST; Dict.fromList over (key, value) tuples. + entries + |> Map.toList + |> List.map (fun (k, v) -> + dvalToAst v |> Result.map (fun v' -> AST.TupleLiteral [ AST.StringLiteral k; v' ])) + |> allOk + |> Result.map (fun es -> + AST.Call("Stdlib.Dict.fromList", AST.NonEmptyList.singleton (AST.ListLiteral es))) + | DRecord(_, rtName, _, fields) -> + typeNameHash rtName + |> Result.bind (fun h -> + fields + |> Map.toList + |> List.map (fun (n, v) -> dvalToAst v |> Result.map (fun v' -> (n, v'))) + |> allOk + |> Result.map (fun fs -> AST.RecordLiteral(Bridge.nameForType h, fs))) + | DEnum(_, rtName, _, caseName, fields) -> + typeNameHash rtName + |> Result.bind (fun h -> + fields + |> List.map dvalToAst + |> allOk + |> Result.map (fun fs -> + AST.Constructor(Bridge.compilerTypeName h, caseName, Bridge.tuplePayloadPublic fs))) + | other -> Error $"value-dval: {other.GetType().Name}" + +/// Fetch a package value's evaluated Dval and lower it to a shared nullary fn: +/// `def __val.(__unit: Unit) : T = `. A Unit param is how the +/// compiler spells a nullary fn (normalizeNullaryCallArgs drops it at the call +/// site), since FunctionDef.Params is a NonEmptyList. +let private valueFnDef (hash : string) : Ply> = + uply { + let! v = LibDB.PackageManager.rt.getValue (FQValueName.package hash) + match v with + | None -> return Error "package value has no evaluated rt_dval" + | Some pv -> + let mutable counter = 0 + let fresh () = + counter <- counter + 1 + $"vt{counter}" + match valueTypeToAst fresh (Dval.toValueType pv.body), dvalToAst pv.body with + | Error e, _ -> return Error e + | _, Error e -> return Error e + | Ok t, Ok body -> + return + Ok( + { Name = Bridge.valueFnName hash + // Any tvar we introduced for an empty container must be declared. + TypeParams = Bridge.freeTVars t |> Set.toList + Params = AST.NonEmptyList.singleton ("__unit", AST.TUnit) + ReturnType = t + Body = body } : AST.FunctionDef + ) + } + let private buildPieces (effectful : Map) (rootHash : string) @@ -274,41 +413,23 @@ let private buildPieces // dependency order, so iterate to a fixpoint — each pass bridges any value // whose referenced values are now in the map — rather than dropping a // forward reference on a single ordered pass. - let bridgeValuesOnce (m : Map) : Map = - (m, values) - ||> List.fold (fun m (h, pv) -> - if Map.containsKey h m then m - else - let ctx : Bridge.BridgeCtx = - { Params = [||] - Self = "" - Values = m - ValueErrors = Map.empty - Effectful = Map.empty } - match Bridge.bridgeExpr ctx pv.body with - | Ok e -> Map.add h e m - | Error _ -> m) - let rec fixpoint (m : Map) : Map = - let m' = bridgeValuesOnce m - if Map.count m' = Map.count m then m' else fixpoint m' - let valuesMap = fixpoint Map.empty - // Whatever never reached the fixpoint failed for a REASON; re-bridge those - // once against the final map to capture it, so a fn referencing one reports - // the root cause rather than a bare "package value not resolved". - let valueErrors : Map = - values - |> List.filter (fun (h, _) -> not (Map.containsKey h valuesMap)) - |> List.choose (fun (h, pv) -> - let ctx : Bridge.BridgeCtx = - { Params = [||] - Self = "" - Values = valuesMap - ValueErrors = Map.empty - Effectful = Map.empty } - match Bridge.bridgeExpr ctx pv.body with - | Error e -> Some(h, e) - | Ok _ -> None) - |> Map.ofList + // Each package value becomes ONE shared nullary fn, typed and literal-ised + // from its evaluated Dval (rt_dval). No fixpoint is needed any more: a value + // that references other values does so through their Dvals, which are already + // evaluated, so there's nothing to order. And no inlining, so value chains + // can't compound. + let mutable valueDefs : List = [] + let mutable valueOk : Set = Set.empty + let mutable valueErrs : List = [] + for (h, _) in values do + let! r = valueFnDef h + match r with + | Ok fd -> + valueDefs <- valueDefs @ [ fd ] + valueOk <- Set.add h valueOk + | Error e -> valueErrs <- valueErrs @ [ (h, e) ] + let valuesMap = valueOk + let valueErrors = Map.ofList valueErrs let fnDefs = fns |> List.map (fun (h, fn) -> Bridge.bridgeFn typeEnv valuesMap valueErrors effectful (Bridge.nameFor h) fn) @@ -316,7 +437,9 @@ let private buildPieces match typeDefs, fnDefs with | Error e, _ -> return Error e | _, Error e -> return Error e - | Ok tds, Ok fds -> return Ok(tds, fds, Bridge.nameFor rootHash) + // The value fns go in alongside the bridged fns — one definition each, + // shared by every reference. + | Ok tds, Ok fds -> return Ok(tds, valueDefs @ fds, Bridge.nameFor rootHash) } /// Substitute type variables (used to instantiate a generic root fn's type @@ -1130,7 +1253,7 @@ let fns () : List = [ { name = "b"; typ = PT.TInt64; description = "" } ] returnType = PT.TInt64 description = "" } - match Bridge.bridgeFn Map.empty Map.empty Map.empty Map.empty "bridgedFn" ptFn with + match Bridge.bridgeFn Map.empty Set.empty Map.empty Map.empty "bridgedFn" ptFn with | Error e -> outcome false $"bridge: {e}" |> Ply | Ok fd -> let program : AST.Program = From 35210452391b3511a4b90b08e65c01cad0f5eb52 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 23:02:55 -0400 Subject: [PATCH 144/172] =?UTF-8?q?compiler:=20equivalence=20harness=20?= =?UTF-8?q?=E2=80=94=20PROVE=20a=20compiled=20fn=20matches=20the=20interpr?= =?UTF-8?q?eter?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit We could compile ~2000 fns but had only PROVEN 95 of them equal the interpreter. The differential compared STDOUT, and the compiler prints records/nested containers as empty (the print pass only handles lists of Int64/Bool/String/Float via toDisplayString_*), so 434 fns ran fine and could never be checked. "51% compiles" was a claim backed for 95 functions. Make both sides emit the SAME canonical encoding and compare bytes: - interpreter: Dval -> dvalToWire (already existed, and is the spec) - compiled: Bridge.marshalTyped, its mirror — a type-directed serializer that builds an expression emitting that exact format (escaped elements joined by newline, Case / Case+payload, "unit"). Covers scalars, all int widths, List, Tuple, Option, Result; isSerializableType says what can be proven. Real args, not synthesized zeros: Builtin.compilerEquivCheck takes the args as a tuple (2+), a bare value (1), or () for none — a Dark list cannot hold mixed types. The args are real Dvals, so dvalToAst hands the compiled side EXACTLY what the interpreter gets. Generic fns needed one more piece: List.head declares List -> Option, so its return type still mentioned the tvar and was unserializable. unifyType binds the type params structurally from the ACTUAL argument types, which both instantiates a concrete entry point and makes the return type concrete (mainCall's existing default — guess Int64 — is wrong once real args are involved). Proven so far (each is a fn stdout could not check): fib 20 -> match String.slice("hello", 1, 3) -> match (3 args, String return) List.head [10;20;30] -> match (generic, Option return) List.append [1;2] [3] -> match (generic, List return) And it reports honestly rather than passing: List.reverse -> cf|Undefined variable: reverseHelper; a non-serializable return -> unprovable|, never a silent "ran". Next: a hand-authored args file (hash -> args) so this can run over the tree. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 91 +++++++++++ .../Builtins.Compiler/Libs/Compiler.fs | 149 ++++++++++++++++++ 2 files changed, 240 insertions(+) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index a2224ed55a..710709372c 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -707,6 +707,97 @@ let rec isMarshalableType (t : AST.Type) : bool = /// Recursively decode a wire response (an AST String expr) into a native value of /// compiler type `t`. Compound children were escaped by the daemon (escWire), so /// each is unescaped before decoding. `d` keeps the let-bound temp unique per depth. +/// The MIRROR of unmarshalTyped: build an expression that serializes a native value +/// of type `t` into the daemon's wire format (see Compiler.dvalToWire, which is the +/// spec). This is what makes equivalence PROVABLE: the compiled program emits the +/// exact same canonical encoding the interpreter's Dval does, so the two can be +/// compared as strings — instead of comparing stdout, where the compiler prints +/// records/nested containers as empty and most fns simply can't be checked. +/// +/// Must stay byte-identical to dvalToWire: elements/fields escaped and joined by +/// "\n", enums as `Case` or `Case\n`, Unit as "unit". +let rec marshalTyped (d : int) (t : AST.Type) (v : AST.Expr) : Result = + let call n args = AST.Call(n, AST.NonEmptyList.fromList args) + let esc e = call "Stdlib.hostRpcEscape" [ e ] + let join xs sep = call "Stdlib.String.join" [ xs; AST.StringLiteral sep ] + let cat a b = AST.BinOp(AST.StringConcat, a, b) + match t with + | AST.TString -> Ok v + | AST.TChar -> Ok v // a Char is already its own text + | AST.TInt64 -> Ok(call "Stdlib.Int64.toString" [ v ]) + | AST.TInt8 -> Ok(call "Stdlib.Int8.toString" [ v ]) + | AST.TInt16 -> Ok(call "Stdlib.Int16.toString" [ v ]) + | AST.TInt32 -> Ok(call "Stdlib.Int32.toString" [ v ]) + | AST.TUInt8 -> Ok(call "Stdlib.UInt8.toString" [ v ]) + | AST.TUInt16 -> Ok(call "Stdlib.UInt16.toString" [ v ]) + | AST.TUInt32 -> Ok(call "Stdlib.UInt32.toString" [ v ]) + | AST.TUInt64 -> Ok(call "Stdlib.UInt64.toString" [ v ]) + | AST.TBool -> Ok(call "Stdlib.Bool.toString" [ v ]) + | AST.TFloat64 -> Ok(call "Stdlib.Float.toString" [ v ]) + // `unit` regardless of the value, but keep v evaluated so effects/typing hold. + | AST.TUnit -> Ok(AST.Let("__mu" + string d, v, AST.StringLiteral "unit")) + | AST.TList inner -> + let ev = "__me" + string d + marshalTyped (d + 1) inner (AST.Var ev) + |> Result.map (fun body -> + let lam = AST.Lambda(AST.NonEmptyList.fromList [ (ev, inner) ], esc body) + join (AST.TypeApp("Stdlib.List.map", [ inner; AST.TString ], AST.NonEmptyList.fromList [ v; lam ])) "\n") + | AST.TTuple ts -> + // Tuples have no generic map; index each slot and concat with "\n". + ts + |> List.mapi (fun i el -> marshalTyped (d + 1) el (AST.TupleAccess(v, i)) |> Result.map esc) + |> allOk + |> Result.map (fun parts -> + match parts with + | [] -> AST.StringLiteral "" + | first :: rest -> rest |> List.fold (fun acc p -> cat (cat acc (AST.StringLiteral "\n")) p) first) + | AST.TSum("Stdlib.Option.Option", [ inner ]) -> + let xv = "__mo" + string d + marshalTyped (d + 1) inner (AST.Var xv) + |> Result.map (fun body -> + AST.Match( + v, + [ { Patterns = AST.NonEmptyList.singleton (AST.PConstructor("None", None)) + Guard = None + Body = AST.StringLiteral "None" } + { Patterns = + AST.NonEmptyList.singleton (AST.PConstructor("Some", Some(AST.PVar xv))) + Guard = None + Body = cat (AST.StringLiteral "Some\n") (esc body) } ] + )) + | AST.TSum("Stdlib.Result.Result", [ okT; errT ]) -> + let ov = "__mrk" + string d + let evv = "__mre" + string d + match marshalTyped (d + 1) okT (AST.Var ov), marshalTyped (d + 1) errT (AST.Var evv) with + | Ok okBody, Ok errBody -> + Ok( + AST.Match( + v, + [ { Patterns = AST.NonEmptyList.singleton (AST.PConstructor("Ok", Some(AST.PVar ov))) + Guard = None + Body = cat (AST.StringLiteral "Ok\n") (esc okBody) } + { Patterns = + AST.NonEmptyList.singleton (AST.PConstructor("Error", Some(AST.PVar evv))) + Guard = None + Body = cat (AST.StringLiteral "Error\n") (esc errBody) } ] + ) + ) + | Error e, _ -> Error e + | _, Error e -> Error e + | other -> Error $"marshal: {other}" + +/// Can marshalTyped encode this type? (Mirrors what the comparison can prove.) +let rec isSerializableType (t : AST.Type) : bool = + match t with + | AST.TString | AST.TChar | AST.TBool | AST.TUnit | AST.TFloat64 + | AST.TInt8 | AST.TInt16 | AST.TInt32 | AST.TInt64 + | AST.TUInt8 | AST.TUInt16 | AST.TUInt32 | AST.TUInt64 -> true + | AST.TList inner -> isSerializableType inner + | AST.TTuple ts -> List.forall isSerializableType ts + | AST.TSum("Stdlib.Option.Option", [ inner ]) -> isSerializableType inner + | AST.TSum("Stdlib.Result.Result", [ a; b ]) -> isSerializableType a && isSerializableType b + | _ -> false + let rec unmarshalTyped (d : int) (t : AST.Type) (src : AST.Expr) : AST.Expr = let rv = "__rpc_" + string d let r = AST.Var rv diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index d64c54afed..0672cf7d18 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -870,6 +870,129 @@ let private startDaemon /// effectful builtins are serviced) with a timeout, and classify the outcome: /// "cf|" compile-fail, "hang" (timed out — e.g. multi-element list), /// "crash|", or "ran|". This is the runnable-vs-compilable measure. +/// Bind a generic fn's type params by matching its DECLARED param types against the +/// types of the actual arguments. `List.head` declares `List<'a> -> Option<'a>`, so +/// without this its return type still mentions 'a and can't be serialized (nor can a +/// concrete entry point be emitted). Structural, first-binding-wins — the args are +/// real values, so there's nothing to solve. +let rec private unifyType + (declared : AST.Type) + (actual : AST.Type) + (acc : Map) + : Map = + let both xs ys m = + if List.length xs = List.length ys then List.fold2 (fun m x y -> unifyType x y m) m xs ys + else m + match declared, actual with + | AST.TVar v, _ -> if Map.containsKey v acc then acc else Map.add v actual acc + | AST.TList a, AST.TList b -> unifyType a b acc + | AST.TTuple xs, AST.TTuple ys -> both xs ys acc + | AST.TSum(_, xs), AST.TSum(_, ys) -> both xs ys acc + | AST.TRecord(_, xs), AST.TRecord(_, ys) -> both xs ys acc + | AST.TDict(k1, v1), AST.TDict(k2, v2) -> unifyType v1 v2 (unifyType k1 k2 acc) + | AST.TFunction(pa, ra), AST.TFunction(pb, rb) -> unifyType ra rb (both pa pb acc) + | _ -> acc + +/// PROVE that a compiled fn agrees with the interpreter, for real arguments. +/// +/// The old differential compared STDOUT, which the compiler renders as empty for +/// records/nested containers — so most fns ran but could never be checked (434 of +/// them). Instead, make both sides emit the same canonical wire encoding and compare +/// THAT: the interpreter's Dval through dvalToWire, the compiled program through +/// Bridge.marshalTyped (its mirror). Same bytes on both sides or it's a real diff. +/// +/// Returns "match", "DIFF|c=…|i=…", or a reason it couldn't be proven either way. +let private equivOne + (exeState : ExecutionState) + (vm : VMState) + (effectful : Map) + (timeoutMs : int) + (hash : string) + (args : List) + : Ply = + uply { + try + let! pieces = buildPieces effectful hash + match pieces with + | Error e -> return "cf|" + e + | Ok(typeDefs, fds, rootName) -> + match fds |> List.tryFind (fun fd -> fd.Name = rootName) with + | None -> return "cf|root fn not bridged" + | Some rootFd -> + // The args come in as real Dvals, so reuse the value-literal machinery to + // hand the compiled side EXACTLY the same inputs the interpreter gets. + let argLits = args |> List.map dvalToAst + match argLits |> List.tryPick (function Error e -> Some e | Ok _ -> None) with + | Some e -> return "skip|arg-literal: " + e + | None -> + let argExprs = argLits |> List.map (function Ok x -> x | Error _ -> AST.UnitLiteral) + // Instantiate the root's type params from the ACTUAL argument types, so a + // generic fn gets a concrete entry point AND a serializable return type + // (mainCall's default is to guess Int64, which is wrong for real args). + let mutable c = 0 + let fresh () = + c <- c + 1 + $"at{c}" + let actualTypes = + args |> List.map (fun a -> valueTypeToAst fresh (Dval.toValueType a)) + let declaredTypes = rootFd.Params |> AST.NonEmptyList.toList |> List.map snd + let binding = + (Map.empty, List.zip declaredTypes (actualTypes |> List.map (Result.defaultValue (AST.TVar "?")))) + ||> List.fold (fun m (d, a) -> unifyType d a m) + let retType = substTVars binding rootFd.ReturnType + let entry = + if List.isEmpty rootFd.TypeParams then + AST.Call(rootFd.Name, AST.NonEmptyList.fromList argExprs) + else + let tas = + rootFd.TypeParams + |> List.map (fun tp -> Map.tryFind tp binding |> Option.defaultValue AST.TInt64) + AST.TypeApp(rootFd.Name, tas, AST.NonEmptyList.fromList argExprs) + if not (Bridge.isSerializableType retType) then + // Be explicit: this fn is NOT proven, rather than silently "ran". + return $"unprovable|return type not serializable: {retType}" + else + match Bridge.marshalTyped 0 retType entry with + | Error e -> return "unprovable|" + e + | Ok marshalled -> + match compileClosure typeDefs fds marshalled with + | Error e -> return "cf|compile: " + e + | Ok binary -> + let (daemon, shutdown) = startDaemon exeState vm + let out = CompilerLibrary.execute 0 timeoutMs binary + shutdown () + let _ = (try daemon.Wait() with _ -> ()) + if out.ExitCode <> 0 then + return $"crash|{out.ExitCode}" + else + let compiled = out.Stdout.TrimEnd('\n') + let interp = + try + let argsNE = + match args with + | [] -> NEList.singleton DUnit + | _ -> NEList.ofList args.Head args.Tail + match + (LibExecution.Execution.executeFunction + exeState + (FQFnName.fqPackage hash) + [] + argsNE) + .Result + with + | Ok v -> Ok(dvalToWire v) + | Error(_, e) -> Error(string e) + with e -> Error("exn: " + e.Message) + match interp with + | Error e -> return "ierr|" + e + | Ok i -> + if compiled = i then return "match" + else + let esc (s : string) = s.Replace("\n", "\\n") + return $"DIFF|c={esc compiled}|i={esc i}" + with e -> return "harness-exn|" + e.Message + } + let private runOne (exeState : ExecutionState) (vm : VMState) @@ -1541,6 +1664,32 @@ let fns () : List = capabilities = LibExecution.Capabilities.noCaps deprecated = NotDeprecated } + { name = fn "compilerEquivCheck" 0 + typeParams = [] + parameters = + [ Param.make "hash" TString "package fn content hash" + Param.make "args" (TVariable "a") "the fn's arguments: a tuple for 2+, the bare value for 1, () for none" ] + returnType = TString + description = + "PROVES a compiled fn agrees with the interpreter on real arguments. Both sides emit the same canonical wire encoding (the interpreter's Dval via dvalToWire; the compiled program via the mirror, Bridge.marshalTyped) and the bytes are compared — unlike the stdout comparison, which can't see records/nested containers and left most fns unprovable. Args are passed as a tuple (2+), a bare value (1), or () for none, since a Dark list can't hold mixed types. Returns match / DIFF|c=..|i=.. / unprovable| / cf| / ierr| / crash|." + fn = + (function + | exeState, vm, _, [ DString hash; argsDval ] -> + uply { + let args = + match argsDval with + | DUnit -> [] // nullary + | DTuple(a, b, rest) -> a :: b :: rest // 2+ args + | single -> [ single ] // exactly 1 + let! r = equivOne exeState vm (buildEffectfulMap exeState) 10000 hash args + return DString r + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + { name = fn "compilerRunSweep" 0 typeParams = [] parameters = From 7870181962d359a7e31a532bc53f4496ecce18a8 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 23:09:25 -0400 Subject: [PATCH 145/172] compiler: fix TInt args silently marshalling as STRINGS through the RPC seam wireToDval had no TInt case, so it fell through to `| _ -> DString s`. Dark's TInt is arbitrary-precision and is NOT TInt64 -- and buildEffectfulMap happily routes a TInt param (as WAInt) -- so every effectful builtin taking a TInt received its numbers as strings and returned garbage. intRandom(5,5) returned a fixed 3744625903238887673 no matter the bounds; the interpreter returns 5. Add TInt (and the remaining int widths, which had the same hole: TInt8/16/32/128 and TUInt8/16/32/64/128). This is the same shape as the DList-as-handle bug: the fn compiles, the fn RUNS, and it returns a wrong answer. A compile check can never see it. The equivalence harness found it within minutes of existing, on the first 30 fns swept -- which is the argument for the harness. Also fix a harness bug it exposed: unifyType used List.zip on declared-vs-actual arg types, which throws when arity differs (a Dark nullary fn declares one Unit param but is called with no args). Truncate to the common length instead. intRandom(5,5) -> match ; intRandom(1,1) -> match ; fib 20 -> match --- .../Builtins.Compiler/Libs/Compiler.fs | 105 +++++++++++++++++- 1 file changed, 104 insertions(+), 1 deletion(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 0672cf7d18..d1c48f615b 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -720,6 +720,22 @@ let private wireToDval (t : TypeReference) (s : string) : Dval = match t with | TString -> DString s | TInt64 -> DInt64(int64 s) + // Dark's TInt (arbitrary-precision) is NOT TInt64, and buildEffectfulMap happily + // routes a TInt param (as WAInt) -- but this fell through to `| _ -> DString s`, + // so a TInt-taking builtin silently received its numbers as STRINGS. intRandom(5,5) + // returned a fixed 3744625903238887673 instead of 5, whatever the bounds. Same + // shape as the DList-as-handle bug: the builtin runs, returns garbage, and only a + // value comparison catches it -- a compile check never would. + | TInt -> DInt(DarkInt.ofBigInt (System.Numerics.BigInteger.Parse s)) + | TInt8 -> DInt8(sbyte s) + | TInt16 -> DInt16(int16 s) + | TInt32 -> DInt32(int32 s) + | TInt128 -> DInt128(System.Int128.Parse s) + | TUInt8 -> DUInt8(byte s) + | TUInt16 -> DUInt16(uint16 s) + | TUInt32 -> DUInt32(uint32 s) + | TUInt64 -> DUInt64(uint64 s) + | TUInt128 -> DUInt128(System.UInt128.Parse s) | TBool -> DBool(s = "true") | TUnit -> DUnit | TFloat -> DFloat(float s) @@ -893,6 +909,39 @@ let rec private unifyType | AST.TFunction(pa, ra), AST.TFunction(pb, rb) -> unifyType ra rb (both pa pb acc) | _ -> acc +/// A REALISTIC sample argument for a declared param type — 42, "hello", [1;2;3] — +/// not the zero/empty values the compile-check synthesizes. Zeros make fns take +/// degenerate paths (div-by-zero, unwrap-of-None, empty-list early returns), which is +/// why the old sweep produced so many crashes and interpreter errors that proved +/// nothing. A type var monomorphizes at Int64. Returns None for types we can't +/// sensibly sample (custom types, Dict, fns), so the caller reports "no sample args" +/// instead of pretending. +let rec private sampleArg (t : PT.TypeReference) : Option = + match t with + | PT.TUnit -> Some DUnit + | PT.TBool -> Some(DBool true) + | PT.TInt64 -> Some(DInt64 42L) + | PT.TInt8 -> Some(DInt8 7y) + | PT.TInt16 -> Some(DInt16 7s) + | PT.TInt32 -> Some(DInt32 7l) + | PT.TUInt8 -> Some(DUInt8 7uy) + | PT.TUInt16 -> Some(DUInt16 7us) + | PT.TUInt32 -> Some(DUInt32 7ul) + | PT.TUInt64 -> Some(DUInt64 7UL) + | PT.TInt -> Some(DInt(DarkInt.ofBigInt (bigint 42))) + | PT.TFloat -> Some(DFloat 2.5) + | PT.TChar -> Some(DChar "a") + | PT.TString -> Some(DString "hello") + | PT.TVariable _ -> Some(DInt64 42L) // monomorphize a type param at Int64 + | PT.TList inner -> + sampleArg inner + |> Option.map (fun v -> DList(Dval.toValueType v, [ v; v; v ])) + | PT.TTuple(a, b, rest) -> + match sampleArg a, sampleArg b, rest |> List.map sampleArg |> List.fold (fun acc o -> match acc, o with Some xs, Some x -> Some(xs @ [ x ]) | _ -> None) (Some []) with + | Some a', Some b', Some rest' -> Some(DTuple(a', b', rest')) + | _ -> None + | _ -> None + /// PROVE that a compiled fn agrees with the interpreter, for real arguments. /// /// The old differential compared STDOUT, which the compiler renders as empty for @@ -936,8 +985,16 @@ let private equivOne let actualTypes = args |> List.map (fun a -> valueTypeToAst fresh (Dval.toValueType a)) let declaredTypes = rootFd.Params |> AST.NonEmptyList.toList |> List.map snd + // zip, not List.zip: arity can legitimately differ (a Dark nullary fn + // declares one Unit param but is called with no args), and List.zip + // throws "the lists had different lengths" on that. let binding = - (Map.empty, List.zip declaredTypes (actualTypes |> List.map (Result.defaultValue (AST.TVar "?")))) + (Map.empty, + List.zip + (declaredTypes |> List.truncate (List.length actualTypes)) + (actualTypes + |> List.truncate (List.length declaredTypes) + |> List.map (Result.defaultValue (AST.TVar "?")))) ||> List.fold (fun m (d, a) -> unifyType d a m) let retType = substTVars binding rootFd.ReturnType let entry = @@ -1690,6 +1747,52 @@ let fns () : List = capabilities = LibExecution.Capabilities.noCaps deprecated = NotDeprecated } + { name = fn "compilerEquivSweep" 0 + typeParams = [] + parameters = [ Param.make "hashes" (TList TString) "package fn content hashes" ] + returnType = TString + description = + "Equivalence sweep: for each fn, synthesize REALISTIC args from its declared param types (42, \"hello\", [1;2;3] — not the zeros the compile-check uses, which push fns down degenerate paths), then prove compiled == interpreted by comparing the canonical wire encoding both sides emit. One `\\t` line each: match / DIFF|c=..|i=.. / unprovable| / noargs| / cf| / ierr / crash. This is the number that matters — compile coverage is not correctness." + fn = + (function + | exeState, vm, _, [ DList(_, hashes) ] -> + uply { + let effectful = buildEffectfulMap exeState + let mutable lines : List = [] + for hd in hashes do + match hd with + | DString hash -> + let! fnOpt = LibDB.PackageManager.pt.getFn (PT.FQFnName.package hash) + match fnOpt with + | None -> lines <- lines @ [ hash + "\tcf|not found" ] + | Some f -> + let ps = NEList.toList f.parameters + // A single Unit param is Dark's nullary; call with no args. + let sampled = + match ps with + | [ p ] when p.typ = PT.TUnit -> Some [] + | _ -> + (Some [], ps) + ||> List.fold (fun acc p -> + match acc, sampleArg p.typ with + | Some xs, Some v -> Some(xs @ [ v ]) + | _ -> None) + match sampled with + | None -> + let ts = ps |> List.map (fun p -> string p.typ) |> String.concat ", " + lines <- lines @ [ hash + "\tnoargs|" + ts ] + | Some args -> + let! r = equivOne exeState vm effectful 10000 hash args + lines <- lines @ [ hash + "\t" + r ] + | _ -> lines <- lines @ [ "?\tcf|non-string-hash" ] + return DString(String.concat "\n" lines) + } + | _ -> incorrectArgs ()) + sqlSpec = NotQueryable + previewable = Impure + capabilities = LibExecution.Capabilities.noCaps + deprecated = NotDeprecated } + { name = fn "compilerRunSweep" 0 typeParams = [] parameters = From 92fa77e9e2790e22144c5b556a6f7d3e1db15651 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Thu, 16 Jul 2026 23:32:18 -0400 Subject: [PATCH 146/172] compiler: prove records + custom enums, and sample custom-type args Three limits kept the equivalence harness from proving most of what compiles. Over a 400-fn sample it went 105 -> 148 proven, with these: 1. ARGS for custom types (191 of 222 unprovable fns took a record or enum). sampleArgDeep reads the type definition and builds a real Dval: every field for a record, the first samplable case for an enum (so a recursive type terminates via its base case, like zeroValue). noargs fell 222 -> 54. 2. RETURNS that are records/custom enums (104 + 68 of the rest). Both sides needed it and had to agree byte-for-byte: - dvalToWire had NO DRecord case at all -- records hit "?unmarshalable:DRecord", so any record-returning fn was unprovable. Fields are emitted in NAME order (DvalMap iterates sorted). - marshalTyped grew TRecord (sort fields by name to match) and TSum for user enums (match every variant; `Case` or `Case\n`). A multi-field variant is packed by the bridge into a TUPLE payload, so it is destructured and each field escaped separately -- dvalToWire escapes fields individually, and encoding them as a nested tuple would silently mismatch on every such enum. 3. NONDETERMINISM. The interpreter now runs twice; a fn that disagrees with ITSELF (uuidGenerate, intRandom) reports `nondet` instead of a false DIFF. That is what the one remaining DIFF in the 400-sample was -- a generated UUID. Also fixed, all found by running the thing: - sample ints 42 -> 5. 42 hung the entire sweep on the first exponential fn it met: fib(42) interpreted is ~2000x fib(27), which alone takes 21s. A sample arg has to be cheap as well as realistic. - TrimEnd('\n') on compiled stdout ate newlines belonging to the VALUE and reported two false DIFFs on strings that legitimately end in one. Strip exactly the one Print appends. - NonEmptyList.fromList [] threw for nullary fns (28 harness-exns); a nullary call is spelled with a Unit arg. Chunked sweeping is abandoned for this: equivOne caps the BINARY at 10s but the interpreter call has no timeout, so one slow fn made a 20-fn chunk time out and emit NOTHING -- silently costing 20 results. Run one fn per invocation and bound it from the shell. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 84 ++++++- .../Builtins.Compiler/Libs/Compiler.fs | 228 ++++++++++++++---- 2 files changed, 260 insertions(+), 52 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 710709372c..0f3dec1db6 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -716,7 +716,13 @@ let rec isMarshalableType (t : AST.Type) : bool = /// /// Must stay byte-identical to dvalToWire: elements/fields escaped and joined by /// "\n", enums as `Case` or `Case\n`, Unit as "unit". -let rec marshalTyped (d : int) (t : AST.Type) (v : AST.Expr) : Result = +let rec marshalTyped + (defs : Map) + (d : int) + (t : AST.Type) + (v : AST.Expr) + : Result = + let marshalTyped = marshalTyped defs let call n args = AST.Call(n, AST.NonEmptyList.fromList args) let esc e = call "Stdlib.hostRpcEscape" [ e ] let join xs sep = call "Stdlib.String.join" [ xs; AST.StringLiteral sep ] @@ -784,10 +790,71 @@ let rec marshalTyped (d : int) (t : AST.Type) (v : AST.Expr) : Result Error e | _, Error e -> Error e + // A record: emit its fields in NAME order, escaped, joined by "\n" — exactly what + // dvalToWire does (its DvalMap iterates sorted). 104 of the unprovable fns returned + // a record. + | AST.TRecord(name, _) -> + match Map.tryFind name defs with + | Some(AST.RecordDef(_, _, fields)) -> + fields + |> List.sortBy fst + |> List.map (fun (fname, ft) -> + marshalTyped (d + 1) ft (AST.RecordAccess(v, fname)) |> Result.map esc) + |> allOk + |> Result.map (fun parts -> + match parts with + | [] -> AST.StringLiteral "" + | first :: rest -> + rest |> List.fold (fun acc p -> cat (cat acc (AST.StringLiteral "\n")) p) first) + | _ -> Error $"marshal: no record def {name}" + // A user enum: match every variant and emit `Case` / `Case\n`. + // dvalToWire escapes each FIELD separately, so a multi-field variant (which the + // bridge packs into a tuple payload) must be destructured, not encoded as a tuple. + | AST.TSum(name, _) -> + match Map.tryFind name defs with + | Some(AST.SumTypeDef(_, _, variants)) -> + variants + |> List.map (fun (variant : AST.Variant) -> + match variant.Payload with + | None -> + Ok + { AST.Patterns = AST.NonEmptyList.singleton (AST.PConstructor(variant.Name, None)) + AST.Guard = None + AST.Body = AST.StringLiteral variant.Name } + | Some(AST.TTuple elemTs) -> + // multi-field variant: bind each slot, escape each, join + let names = elemTs |> List.mapi (fun i _ -> $"__mv{d}_{i}") + List.zip names elemTs + |> List.map (fun (n, et) -> marshalTyped (d + 1) et (AST.Var n) |> Result.map esc) + |> allOk + |> Result.map (fun parts -> + let body = + parts + |> List.fold + (fun acc p -> cat (cat acc (AST.StringLiteral "\n")) p) + (AST.StringLiteral variant.Name) + { AST.Patterns = + AST.NonEmptyList.singleton ( + AST.PConstructor(variant.Name, Some(AST.PTuple(names |> List.map AST.PVar))) + ) + AST.Guard = None + AST.Body = body }) + | Some pt -> + let n = $"__mv{d}" + marshalTyped (d + 1) pt (AST.Var n) + |> Result.map (fun body -> + { AST.Patterns = + AST.NonEmptyList.singleton (AST.PConstructor(variant.Name, Some(AST.PVar n))) + AST.Guard = None + AST.Body = cat (cat (AST.StringLiteral variant.Name) (AST.StringLiteral "\n")) (esc body) })) + |> allOk + |> Result.map (fun cases -> AST.Match(v, cases)) + | _ -> Error $"marshal: no sum def {name}" | other -> Error $"marshal: {other}" /// Can marshalTyped encode this type? (Mirrors what the comparison can prove.) -let rec isSerializableType (t : AST.Type) : bool = +let rec isSerializableType (defs : Map) (t : AST.Type) : bool = + let isSerializableType = isSerializableType defs match t with | AST.TString | AST.TChar | AST.TBool | AST.TUnit | AST.TFloat64 | AST.TInt8 | AST.TInt16 | AST.TInt32 | AST.TInt64 @@ -796,6 +863,19 @@ let rec isSerializableType (t : AST.Type) : bool = | AST.TTuple ts -> List.forall isSerializableType ts | AST.TSum("Stdlib.Option.Option", [ inner ]) -> isSerializableType inner | AST.TSum("Stdlib.Result.Result", [ a; b ]) -> isSerializableType a && isSerializableType b + | AST.TRecord(name, _) -> + match Map.tryFind name defs with + | Some(AST.RecordDef(_, _, fields)) -> fields |> List.forall (snd >> isSerializableType) + | _ -> false + | AST.TSum(name, _) -> + match Map.tryFind name defs with + | Some(AST.SumTypeDef(_, _, variants)) -> + variants + |> List.forall (fun (v : AST.Variant) -> + match v.Payload with + | None -> true + | Some p -> isSerializableType p) + | _ -> false | _ -> false let rec unmarshalTyped (d : int) (t : AST.Type) (src : AST.Expr) : AST.Expr = diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index d1c48f615b..1b1c6ae900 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -694,6 +694,12 @@ let rec private dvalToWire (d : Dval) : string = | DList(_, xs) -> xs |> List.map (dvalToWire >> escWire) |> String.concat "\n" | DTuple(a, b, rest) -> (a :: b :: rest) |> List.map (dvalToWire >> escWire) |> String.concat "\n" + // Records had NO case here and fell through to "?unmarshalable:DRecord", so any + // record-returning fn was unprovable. Fields go in NAME order (Map.toList is + // sorted) -- Bridge.marshalTyped sorts to match, and the two encodings must stay + // byte-identical or every record comparison is a false DIFF. + | DRecord(_, _, _, fields) -> + fields |> Map.toList |> List.map (snd >> dvalToWire >> escWire) |> String.concat "\n" | DString s -> s | DInt n -> string (DarkInt.toBigInt n) | DInt8 n -> string n @@ -886,41 +892,19 @@ let private startDaemon /// effectful builtins are serviced) with a timeout, and classify the outcome: /// "cf|" compile-fail, "hang" (timed out — e.g. multi-element list), /// "crash|", or "ran|". This is the runnable-vs-compilable measure. -/// Bind a generic fn's type params by matching its DECLARED param types against the -/// types of the actual arguments. `List.head` declares `List<'a> -> Option<'a>`, so -/// without this its return type still mentions 'a and can't be serialized (nor can a -/// concrete entry point be emitted). Structural, first-binding-wins — the args are -/// real values, so there's nothing to solve. -let rec private unifyType - (declared : AST.Type) - (actual : AST.Type) - (acc : Map) - : Map = - let both xs ys m = - if List.length xs = List.length ys then List.fold2 (fun m x y -> unifyType x y m) m xs ys - else m - match declared, actual with - | AST.TVar v, _ -> if Map.containsKey v acc then acc else Map.add v actual acc - | AST.TList a, AST.TList b -> unifyType a b acc - | AST.TTuple xs, AST.TTuple ys -> both xs ys acc - | AST.TSum(_, xs), AST.TSum(_, ys) -> both xs ys acc - | AST.TRecord(_, xs), AST.TRecord(_, ys) -> both xs ys acc - | AST.TDict(k1, v1), AST.TDict(k2, v2) -> unifyType v1 v2 (unifyType k1 k2 acc) - | AST.TFunction(pa, ra), AST.TFunction(pb, rb) -> unifyType ra rb (both pa pb acc) - | _ -> acc - -/// A REALISTIC sample argument for a declared param type — 42, "hello", [1;2;3] — -/// not the zero/empty values the compile-check synthesizes. Zeros make fns take -/// degenerate paths (div-by-zero, unwrap-of-None, empty-list early returns), which is -/// why the old sweep produced so many crashes and interpreter errors that proved -/// nothing. A type var monomorphizes at Int64. Returns None for types we can't -/// sensibly sample (custom types, Dict, fns), so the caller reports "no sample args" -/// instead of pretending. +/// sampleArg, extended to CUSTOM TYPES by reading their definitions. 191 of the 222 +/// fns the harness couldn't check took a record or enum, so this is the difference +/// between proving a fifth of the tree and proving most of it. Records get every +/// field sampled; enums take their first non-recursive case (like zeroValue, so a +/// recursive type terminates via its base case). `seen` guards recursion. let rec private sampleArg (t : PT.TypeReference) : Option = match t with | PT.TUnit -> Some DUnit | PT.TBool -> Some(DBool true) - | PT.TInt64 -> Some(DInt64 42L) + // Small on purpose: a sample arg must be cheap as well as realistic. 42 hung the + // whole sweep on the first exponential fn it met (fib(42) interpreted is ~2000x + // fib(27), which already takes 21s), and every chunk timed out with zero output. + | PT.TInt64 -> Some(DInt64 5L) | PT.TInt8 -> Some(DInt8 7y) | PT.TInt16 -> Some(DInt16 7s) | PT.TInt32 -> Some(DInt32 7l) @@ -928,11 +912,11 @@ let rec private sampleArg (t : PT.TypeReference) : Option = | PT.TUInt16 -> Some(DUInt16 7us) | PT.TUInt32 -> Some(DUInt32 7ul) | PT.TUInt64 -> Some(DUInt64 7UL) - | PT.TInt -> Some(DInt(DarkInt.ofBigInt (bigint 42))) + | PT.TInt -> Some(DInt(DarkInt.ofBigInt (bigint 5))) | PT.TFloat -> Some(DFloat 2.5) | PT.TChar -> Some(DChar "a") | PT.TString -> Some(DString "hello") - | PT.TVariable _ -> Some(DInt64 42L) // monomorphize a type param at Int64 + | PT.TVariable _ -> Some(DInt64 5L) // monomorphize a type param at Int64 | PT.TList inner -> sampleArg inner |> Option.map (fun v -> DList(Dval.toValueType v, [ v; v; v ])) @@ -951,6 +935,104 @@ let rec private sampleArg (t : PT.TypeReference) : Option = /// Bridge.marshalTyped (its mirror). Same bytes on both sides or it's a real diff. /// /// Returns "match", "DIFF|c=…|i=…", or a reason it couldn't be proven either way. +let rec private sampleArgDeep + (seen : Set) + (t : PT.TypeReference) + : Ply> = + uply { + match t with + | PT.TList inner -> + let! v = sampleArgDeep seen inner + return v |> Option.map (fun v -> DList(Dval.toValueType v, [ v; v; v ])) + | PT.TTuple(a, b, rest) -> + let! a' = sampleArgDeep seen a + let! b' = sampleArgDeep seen b + let mutable restVs = [] + let mutable ok = true + for r in rest do + let! rv = sampleArgDeep seen r + match rv with + | Some v -> restVs <- restVs @ [ v ] + | None -> ok <- false + match a', b', ok with + | Some a'', Some b'', true -> return Some(DTuple(a'', b'', restVs)) + | _ -> return None + | PT.TCustomType(nr, _targs) -> + match nr.resolved with + | Error _ -> return None + | Ok resolved -> + match resolved.name with + | PT.FQTypeName.Package(PT.Hash h) -> + if Set.contains h seen then + return None // recursive: let the caller fall back + else + let! tOpt = LibDB.PackageManager.pt.getType (PT.FQTypeName.package h) + match tOpt with + | None -> return None + | Some pt -> + let seen' = Set.add h seen + let rtName = FQTypeName.Package(Hash h) + match pt.declaration.definition with + | PT.TypeDeclaration.Alias inner -> return! sampleArgDeep seen' inner + | PT.TypeDeclaration.Record fields -> + let fs = NEList.toList fields + let mutable acc = [] + let mutable ok = true + for (f : PT.TypeDeclaration.RecordField) in fs do + let! v = sampleArgDeep seen' f.typ + match v with + | Some v' -> acc <- acc @ [ (f.name, v') ] + | None -> ok <- false + if ok then return Some(DRecord(rtName, rtName, [], Map.ofList acc)) + else return None + | PT.TypeDeclaration.Enum cases -> + // First case whose payload we can sample — a recursive enum + // terminates through its non-recursive base case. + let mutable result = None + for (c : PT.TypeDeclaration.EnumCase) in NEList.toList cases do + if Option.isNone result then + let mutable acc = [] + let mutable ok = true + for (f : PT.TypeDeclaration.EnumField) in c.fields do + let! v = sampleArgDeep seen' f.typ + match v with + | Some v' -> acc <- acc @ [ v' ] + | None -> ok <- false + if ok then result <- Some(DEnum(rtName, rtName, [], c.name, acc)) + return result + | scalar -> return sampleArg scalar + } + +/// Bind a generic fn's type params by matching its DECLARED param types against the +/// types of the actual arguments. `List.head` declares `List<'a> -> Option<'a>`, so +/// without this its return type still mentions 'a and can't be serialized (nor can a +/// concrete entry point be emitted). Structural, first-binding-wins — the args are +/// real values, so there's nothing to solve. +let rec private unifyType + (declared : AST.Type) + (actual : AST.Type) + (acc : Map) + : Map = + let both xs ys m = + if List.length xs = List.length ys then List.fold2 (fun m x y -> unifyType x y m) m xs ys + else m + match declared, actual with + | AST.TVar v, _ -> if Map.containsKey v acc then acc else Map.add v actual acc + | AST.TList a, AST.TList b -> unifyType a b acc + | AST.TTuple xs, AST.TTuple ys -> both xs ys acc + | AST.TSum(_, xs), AST.TSum(_, ys) -> both xs ys acc + | AST.TRecord(_, xs), AST.TRecord(_, ys) -> both xs ys acc + | AST.TDict(k1, v1), AST.TDict(k2, v2) -> unifyType v1 v2 (unifyType k1 k2 acc) + | AST.TFunction(pa, ra), AST.TFunction(pb, rb) -> unifyType ra rb (both pa pb acc) + | _ -> acc + +/// A REALISTIC sample argument for a declared param type — 42, "hello", [1;2;3] — +/// not the zero/empty values the compile-check synthesizes. Zeros make fns take +/// degenerate paths (div-by-zero, unwrap-of-None, empty-list early returns), which is +/// why the old sweep produced so many crashes and interpreter errors that proved +/// nothing. A type var monomorphizes at Int64. Returns None for types we can't +/// sensibly sample (custom types, Dict, fns), so the caller reports "no sample args" +/// instead of pretending. let private equivOne (exeState : ExecutionState) (vm : VMState) @@ -997,19 +1079,33 @@ let private equivOne |> List.map (Result.defaultValue (AST.TVar "?")))) ||> List.fold (fun m (d, a) -> unifyType d a m) let retType = substTVars binding rootFd.ReturnType + // A nullary call is spelled with a Unit arg (normalizeNullaryCallArgs + // drops it); NonEmptyList.fromList [] would just throw. + let callArgs = + match argExprs with + | [] -> [ AST.UnitLiteral ] + | xs -> xs let entry = if List.isEmpty rootFd.TypeParams then - AST.Call(rootFd.Name, AST.NonEmptyList.fromList argExprs) + AST.Call(rootFd.Name, AST.NonEmptyList.fromList callArgs) else let tas = rootFd.TypeParams |> List.map (fun tp -> Map.tryFind tp binding |> Option.defaultValue AST.TInt64) - AST.TypeApp(rootFd.Name, tas, AST.NonEmptyList.fromList argExprs) - if not (Bridge.isSerializableType retType) then + AST.TypeApp(rootFd.Name, tas, AST.NonEmptyList.fromList callArgs) + let defsByName = + typeDefs + |> List.choose (fun td -> + match td with + | AST.RecordDef(n, _, _) -> Some(n, td) + | AST.SumTypeDef(n, _, _) -> Some(n, td) + | AST.TypeAlias(n, _, _) -> Some(n, td)) + |> Map.ofList + if not (Bridge.isSerializableType defsByName retType) then // Be explicit: this fn is NOT proven, rather than silently "ran". return $"unprovable|return type not serializable: {retType}" else - match Bridge.marshalTyped 0 retType entry with + match Bridge.marshalTyped defsByName 0 retType entry with | Error e -> return "unprovable|" + e | Ok marshalled -> match compileClosure typeDefs fds marshalled with @@ -1022,7 +1118,13 @@ let private equivOne if out.ExitCode <> 0 then return $"crash|{out.ExitCode}" else - let compiled = out.Stdout.TrimEnd('\n') + // Strip exactly ONE trailing newline -- the one Print appends -- + // not all of them. TrimEnd('\n') ate newlines belonging to the + // VALUE and reported two false DIFFs (`/// hello` vs + // `/// hello\n`) on strings that legitimately end in one. + let raw = out.Stdout + let compiled = + if raw.EndsWith "\n" then raw.Substring(0, raw.Length - 1) else raw let interp = try let argsNE = @@ -1040,9 +1142,30 @@ let private equivOne | Ok v -> Ok(dvalToWire v) | Error(_, e) -> Error(string e) with e -> Error("exn: " + e.Message) - match interp with - | Error e -> return "ierr|" + e - | Ok i -> + // Run the interpreter a SECOND time: a fn that disagrees with + // itself (uuidGenerate, random, clock) can't be compared to + // anything, and would otherwise be reported as a false DIFF. + let interp2 = + try + let argsNE = + match args with + | [] -> NEList.singleton DUnit + | _ -> NEList.ofList args.Head args.Tail + match + (LibExecution.Execution.executeFunction + exeState + (FQFnName.fqPackage hash) + [] + argsNE) + .Result + with + | Ok v -> Ok(dvalToWire v) + | Error(_, e) -> Error(string e) + with e -> Error("exn: " + e.Message) + match interp, interp2 with + | Error e, _ -> return "ierr|" + e + | Ok i, Ok i2 when i <> i2 -> return "nondet" + | Ok i, _ -> if compiled = i then return "match" else let esc (s : string) = s.Replace("\n", "\\n") @@ -1768,15 +1891,20 @@ let fns () : List = | Some f -> let ps = NEList.toList f.parameters // A single Unit param is Dark's nullary; call with no args. - let sampled = - match ps with - | [ p ] when p.typ = PT.TUnit -> Some [] - | _ -> - (Some [], ps) - ||> List.fold (fun acc p -> - match acc, sampleArg p.typ with - | Some xs, Some v -> Some(xs @ [ v ]) - | _ -> None) + let! sampled = + uply { + match ps with + | [ p ] when p.typ = PT.TUnit -> return Some [] + | _ -> + let mutable acc = [] + let mutable ok = true + for (p : PT.PackageFn.Parameter) in ps do + let! v = sampleArgDeep Set.empty p.typ + match v with + | Some v' -> acc <- acc @ [ v' ] + | None -> ok <- false + return (if ok then Some acc else None) + } match sampled with | None -> let ts = ps |> List.map (fun p -> string p.typ) |> String.concat ", " From 90e4c5c71cda3bdc8231677ee5e8bdff709624a8 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 00:00:11 -0400 Subject: [PATCH 147/172] compiler: instantiate generic type defs when proving equivalence, and say WHY not Two fixes to the equivalence harness, both found by reading its own output. 1. GENERIC type defs were read without substituting the use site's type args. A def stores `Only of 'a`, but the value in hand is `Scope` -- so walking it hit a bare TVar and the type looked unserializable. substTVarsB/defSubstB instantiate the def's params from the args at both the checking and marshalling sites (records and sums, including multi-field variants). 2. "unprovable|return type not serializable: TRecord(T.a6fa...)" told you nothing -- the exact vague-bucket trap that hid the last two big blockers. serializableReason returns a REASON and names the culprit by path, so the same fn now reports: T..httpClient: T..methods: T..Only: TVar "a" which is what identified (1) in one line. fib and List.head still prove out as match. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 95 ++++++++++++++----- .../Builtins.Compiler/Libs/Compiler.fs | 9 +- 2 files changed, 75 insertions(+), 29 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 0f3dec1db6..2d8abe59c2 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -707,6 +707,28 @@ let rec isMarshalableType (t : AST.Type) : bool = /// Recursively decode a wire response (an AST String expr) into a native value of /// compiler type `t`. Compound children were escaped by the daemon (escWire), so /// each is unescaped before decoding. `d` keeps the let-bound temp unique per depth. +/// Instantiate a type def's params with the args from a USE site: a def stores +/// `Only of 'a`, but the value at hand is `Scope`. Without this, walking a +/// generic type's def hits a bare TVar and looks unserializable. +let rec substTVarsB (m : Map) (t : AST.Type) : AST.Type = + let s = substTVarsB m + match t with + | AST.TVar v -> Map.tryFind v m |> Option.defaultValue t + | AST.TRecord(n, args) -> AST.TRecord(n, List.map s args) + | AST.TSum(n, args) -> AST.TSum(n, List.map s args) + | AST.TList inner -> AST.TList(s inner) + | AST.TTuple ts -> AST.TTuple(List.map s ts) + | AST.TDict(k, v) -> AST.TDict(s k, s v) + | AST.TFunction(args, ret) -> AST.TFunction(List.map s args, s ret) + | other -> other + +/// Zip a def's type params against a use site's type args (tolerating arity drift). +let defSubstB (tps : string list) (args : AST.Type list) : Map = + tps + |> List.mapi (fun i tp -> (tp, List.tryItem i args)) + |> List.choose (fun (tp, a) -> a |> Option.map (fun a -> (tp, a))) + |> Map.ofList + /// The MIRROR of unmarshalTyped: build an expression that serializes a native value /// of type `t` into the daemon's wire format (see Compiler.dvalToWire, which is the /// spec). This is what makes equivalence PROVABLE: the compiled program emits the @@ -793,13 +815,14 @@ let rec marshalTyped // A record: emit its fields in NAME order, escaped, joined by "\n" — exactly what // dvalToWire does (its DvalMap iterates sorted). 104 of the unprovable fns returned // a record. - | AST.TRecord(name, _) -> + | AST.TRecord(name, targs) -> match Map.tryFind name defs with - | Some(AST.RecordDef(_, _, fields)) -> + | Some(AST.RecordDef(_, tps, fields)) -> + let sub = defSubstB tps targs fields |> List.sortBy fst |> List.map (fun (fname, ft) -> - marshalTyped (d + 1) ft (AST.RecordAccess(v, fname)) |> Result.map esc) + marshalTyped (d + 1) (substTVarsB sub ft) (AST.RecordAccess(v, fname)) |> Result.map esc) |> allOk |> Result.map (fun parts -> match parts with @@ -810,9 +833,10 @@ let rec marshalTyped // A user enum: match every variant and emit `Case` / `Case\n`. // dvalToWire escapes each FIELD separately, so a multi-field variant (which the // bridge packs into a tuple payload) must be destructured, not encoded as a tuple. - | AST.TSum(name, _) -> + | AST.TSum(name, targs) -> match Map.tryFind name defs with - | Some(AST.SumTypeDef(_, _, variants)) -> + | Some(AST.SumTypeDef(_, tps, variants)) -> + let sub = defSubstB tps targs variants |> List.map (fun (variant : AST.Variant) -> match variant.Payload with @@ -821,8 +845,9 @@ let rec marshalTyped { AST.Patterns = AST.NonEmptyList.singleton (AST.PConstructor(variant.Name, None)) AST.Guard = None AST.Body = AST.StringLiteral variant.Name } - | Some(AST.TTuple elemTs) -> + | Some(AST.TTuple elemTs0) -> // multi-field variant: bind each slot, escape each, join + let elemTs = elemTs0 |> List.map (substTVarsB sub) let names = elemTs |> List.mapi (fun i _ -> $"__mv{d}_{i}") List.zip names elemTs |> List.map (fun (n, et) -> marshalTyped (d + 1) et (AST.Var n) |> Result.map esc) @@ -839,7 +864,8 @@ let rec marshalTyped ) AST.Guard = None AST.Body = body }) - | Some pt -> + | Some pt0 -> + let pt = substTVarsB sub pt0 let n = $"__mv{d}" marshalTyped (d + 1) pt (AST.Var n) |> Result.map (fun body -> @@ -852,31 +878,50 @@ let rec marshalTyped | _ -> Error $"marshal: no sum def {name}" | other -> Error $"marshal: {other}" -/// Can marshalTyped encode this type? (Mirrors what the comparison can prove.) -let rec isSerializableType (defs : Map) (t : AST.Type) : bool = - let isSerializableType = isSerializableType defs +/// Can marshalTyped encode this type — and if NOT, WHY? Returning a reason rather +/// than a bool matters: "unprovable: TRecord(T.a6fa…)" tells you nothing, and a vague +/// bucket is exactly what hid the last two big blockers. Name the culprit instead. +let rec serializableReason (defs : Map) (t : AST.Type) : Result = + let all xs = xs |> List.map (serializableReason defs) |> allOk |> Result.map (fun _ -> ()) match t with | AST.TString | AST.TChar | AST.TBool | AST.TUnit | AST.TFloat64 | AST.TInt8 | AST.TInt16 | AST.TInt32 | AST.TInt64 - | AST.TUInt8 | AST.TUInt16 | AST.TUInt32 | AST.TUInt64 -> true - | AST.TList inner -> isSerializableType inner - | AST.TTuple ts -> List.forall isSerializableType ts - | AST.TSum("Stdlib.Option.Option", [ inner ]) -> isSerializableType inner - | AST.TSum("Stdlib.Result.Result", [ a; b ]) -> isSerializableType a && isSerializableType b - | AST.TRecord(name, _) -> + | AST.TUInt8 | AST.TUInt16 | AST.TUInt32 | AST.TUInt64 -> Ok() + | AST.TList inner -> serializableReason defs inner + | AST.TTuple ts -> all ts + | AST.TSum("Stdlib.Option.Option", [ inner ]) -> serializableReason defs inner + | AST.TSum("Stdlib.Result.Result", [ a; b ]) -> all [ a; b ] + | AST.TRecord(name, targs) -> match Map.tryFind name defs with - | Some(AST.RecordDef(_, _, fields)) -> fields |> List.forall (snd >> isSerializableType) - | _ -> false - | AST.TSum(name, _) -> + | Some(AST.RecordDef(_, tps, fields)) -> + let sub = defSubstB tps targs + fields + |> List.map (fun (fname, ft) -> + serializableReason defs (substTVarsB sub ft) + |> Result.mapError (fun e -> $"{name}.{fname}: {e}")) + |> allOk + |> Result.map (fun _ -> ()) + | _ -> Error $"no def for record {name}" + | AST.TSum(name, targs) -> match Map.tryFind name defs with - | Some(AST.SumTypeDef(_, _, variants)) -> + | Some(AST.SumTypeDef(_, tps, variants)) -> + let sub = defSubstB tps targs variants - |> List.forall (fun (v : AST.Variant) -> + |> List.map (fun (v : AST.Variant) -> match v.Payload with - | None -> true - | Some p -> isSerializableType p) - | _ -> false - | _ -> false + | None -> Ok() + | Some p -> + serializableReason defs (substTVarsB sub p) + |> Result.mapError (fun e -> $"{name}.{v.Name}: {e}")) + |> allOk + |> Result.map (fun _ -> ()) + | _ -> Error $"no def for sum {name}" + | other -> Error $"{other}" + +let isSerializableType (defs : Map) (t : AST.Type) : bool = + match serializableReason defs t with + | Ok() -> true + | Error _ -> false let rec unmarshalTyped (d : int) (t : AST.Type) (src : AST.Expr) : AST.Expr = let rv = "__rpc_" + string d diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 1b1c6ae900..001551c35e 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -1101,10 +1101,11 @@ let private equivOne | AST.SumTypeDef(n, _, _) -> Some(n, td) | AST.TypeAlias(n, _, _) -> Some(n, td)) |> Map.ofList - if not (Bridge.isSerializableType defsByName retType) then - // Be explicit: this fn is NOT proven, rather than silently "ran". - return $"unprovable|return type not serializable: {retType}" - else + match Bridge.serializableReason defsByName retType with + // Be explicit: this fn is NOT proven, rather than silently "ran" — and say + // WHICH part of the type we can't encode, not just the whole type. + | Error why -> return $"unprovable|{why}" + | Ok() -> match Bridge.marshalTyped defsByName 0 retType entry with | Error e -> return "unprovable|" + e | Ok marshalled -> From 1bb4f409f1939342bed5e935214af506fce4a706 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 02:20:20 -0400 Subject: [PATCH 148/172] compiler: carry custom types INTO builtins through the RPC seam MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The seam only ever carried scalars in the ARG direction, so any builtin taking a record/enum was unroutable — altJsonFormat (arg: a Json enum), cliExecute, fileRead and ~300 others simply couldn't compile. This builds the arg half: - wireToDvalTyped: the daemon-side recursive decoder (wire -> Dval) for containers, records and enums — the mirror of Bridge.marshalTyped and the inverse of dvalToWire. Async, since it fetches type definitions. - unescWire: escWire's inverse. It never existed, because the daemon only ever ESCAPED (encoding a return); nothing had needed to decode. - WireArg += WATyped, marshalled with marshalTyped; BridgeCtx carries the emitted type defs so a record/enum arg can be encoded. - rtToMarshalable names custom types by hash. It is built from the runtime and has no type env, so it can't tell record from sum — marshalTyped/serializableReason now dispatch on the DEFINITION instead of the TRecord/TSum tag, so either works. - dispatchBuiltin decodes args with wireToDvalTyped (the scalar-only path is what made every TInt arg a string). Three bugs this surfaced, all of the "silently wrong" kind: 1. CRASH: marshalTyped INLINES the serializer, so a recursive type (Json = ... | Array of List) generated AST forever and core-dumped the CLI. A recursive type genuinely can't be encoded by a finite inlined expression — it needs a recursive serializer FN. Guard added; it now refuses cleanly. 2. Unencodable args fell back to the RAW VALUE, emitting code that sent a Json where the seam expects a String. Hard-fail instead. 3. Making rtToMarshalable name custom types also widened the RETURN path, where unmarshalTyped has no custom-type case and falls through to `| _ -> src` — it would have handed back the raw wire string AS the value. Gated returns on isMarshalableType: the arg and return directions have DIFFERENT capabilities and one must not imply the other. No coverage gain yet, and altJsonFormat still doesn't compile — but it now routes and says exactly what's missing: "unsupported-builtin: altJsonFormat: arg recursive type T. (needs a recursive serializer fn)" which is true, and names the next piece of work instead of emitting wrong code. 60/60 sampled fns still compile (the apparent 59/60 was a 25s test timeout on a fn that compiles in 34s to a 2.7MB binary). fib, intRandom, slice, marshal/daemon self-tests all still match. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 99 ++++++++-- .../Builtins.Compiler/Libs/Compiler.fs | 185 ++++++++++++++++-- 2 files changed, 249 insertions(+), 35 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 2d8abe59c2..8d51dcff5a 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -39,6 +39,11 @@ type WireArg = | WABool | WAFloat | WAUnit // a Unit param carries no data; sent as the literal "unit" + /// A container/custom-type arg, marshalled with marshalTyped into the same wire + /// format the daemon decodes with wireToDvalTyped. Until this existed the seam + /// carried only scalars in the ARG direction, which is why altJsonFormat (arg: a + /// Json enum), cliExecute, fileRead and ~300 others couldn't route at all. + | WATyped of AST.Type /// How a builtin's wire response is unmarshaled back into a native value. type WireRet = @@ -65,7 +70,10 @@ type BridgeCtx = ValueErrors : Map /// Effectful builtins routable through the host RPC seam: name -> (per-arg /// wire types, return wire type). Built from the live runtime. - Effectful : Map } + Effectful : Map + /// Emitted type definitions, needed to marshal a record/enum ARG into the wire + /// format (marshalTyped dispatches on the def). + TypeDefs : Map } let private err (category : string) (detail : string) : Result<'a, string> = Error $"unsupported-{category}: {detail}" @@ -738,13 +746,22 @@ let defSubstB (tps : string list) (args : AST.Type list) : Map /// /// Must stay byte-identical to dvalToWire: elements/fields escaped and joined by /// "\n", enums as `Case` or `Case\n`, Unit as "unit". -let rec marshalTyped +let rec marshalTypedSeen + (seen : Set) (defs : Map) (d : int) (t : AST.Type) (v : AST.Expr) : Result = - let marshalTyped = marshalTyped defs + // RECURSION GUARD. marshalTyped INLINES the serializer, so a recursive type + // (Stdlib.AltJson.Json = ... | Array of List) generates AST forever and blows + // the stack — it core-dumped the CLI. A recursive type genuinely cannot be encoded + // by a finite inlined expression; it needs a recursive serializer FUNCTION emitted + // per type. Until that exists, refuse cleanly. + let recursionGuard (name : string) = + if Set.contains name seen then Some(Error $"recursive type {name} (needs a recursive serializer fn)") + else None + let marshalTyped d t v = marshalTypedSeen seen defs d t v let call n args = AST.Call(n, AST.NonEmptyList.fromList args) let esc e = call "Stdlib.hostRpcEscape" [ e ] let join xs sep = call "Stdlib.String.join" [ xs; AST.StringLiteral sep ] @@ -812,17 +829,25 @@ let rec marshalTyped ) | Error e, _ -> Error e | _, Error e -> Error e - // A record: emit its fields in NAME order, escaped, joined by "\n" — exactly what - // dvalToWire does (its DvalMap iterates sorted). 104 of the unprovable fns returned - // a record. - | AST.TRecord(name, targs) -> + // Records and user enums dispatch on the DEFINITION, not on whether the type says + // TRecord or TSum. Callers that know a type only by hash (rtToMarshalable, which is + // built from the runtime and has no type env) can't tell record from sum — but the + // def can, so accept either tag and let the def decide. + | AST.TRecord(name, targs) | AST.TSum(name, targs) when + (match Map.tryFind name defs with + | Some(AST.RecordDef _) -> true + | _ -> false) -> + match recursionGuard name with + | Some e -> e + | None -> match Map.tryFind name defs with | Some(AST.RecordDef(_, tps, fields)) -> let sub = defSubstB tps targs + let inner d t v = marshalTypedSeen (Set.add name seen) defs d t v fields |> List.sortBy fst |> List.map (fun (fname, ft) -> - marshalTyped (d + 1) (substTVarsB sub ft) (AST.RecordAccess(v, fname)) |> Result.map esc) + inner (d + 1) (substTVarsB sub ft) (AST.RecordAccess(v, fname)) |> Result.map esc) |> allOk |> Result.map (fun parts -> match parts with @@ -833,10 +858,14 @@ let rec marshalTyped // A user enum: match every variant and emit `Case` / `Case\n`. // dvalToWire escapes each FIELD separately, so a multi-field variant (which the // bridge packs into a tuple payload) must be destructured, not encoded as a tuple. - | AST.TSum(name, targs) -> + | AST.TSum(name, targs) | AST.TRecord(name, targs) -> + match recursionGuard name with + | Some e -> e + | None -> match Map.tryFind name defs with | Some(AST.SumTypeDef(_, tps, variants)) -> let sub = defSubstB tps targs + let marshalTyped d t v = marshalTypedSeen (Set.add name seen) defs d t v variants |> List.map (fun (variant : AST.Variant) -> match variant.Payload with @@ -878,10 +907,18 @@ let rec marshalTyped | _ -> Error $"marshal: no sum def {name}" | other -> Error $"marshal: {other}" +let marshalTyped (defs : Map) (d : int) (t : AST.Type) (v : AST.Expr) = + marshalTypedSeen Set.empty defs d t v + /// Can marshalTyped encode this type — and if NOT, WHY? Returning a reason rather /// than a bool matters: "unprovable: TRecord(T.a6fa…)" tells you nothing, and a vague /// bucket is exactly what hid the last two big blockers. Name the culprit instead. -let rec serializableReason (defs : Map) (t : AST.Type) : Result = +let rec serializableReasonSeen + (seen : Set) + (defs : Map) + (t : AST.Type) + : Result = + let serializableReason defs t = serializableReasonSeen seen defs t let all xs = xs |> List.map (serializableReason defs) |> allOk |> Result.map (fun _ -> ()) match t with | AST.TString | AST.TChar | AST.TBool | AST.TUnit | AST.TFloat64 @@ -891,18 +928,23 @@ let rec serializableReason (defs : Map) (t : AST.Type) : Re | AST.TTuple ts -> all ts | AST.TSum("Stdlib.Option.Option", [ inner ]) -> serializableReason defs inner | AST.TSum("Stdlib.Result.Result", [ a; b ]) -> all [ a; b ] - | AST.TRecord(name, targs) -> + | AST.TRecord(name, targs) | AST.TSum(name, targs) when + (match Map.tryFind name defs with + | Some(AST.RecordDef _) -> true + | _ -> false) -> + if Set.contains name seen then Error $"recursive type {name}" else match Map.tryFind name defs with | Some(AST.RecordDef(_, tps, fields)) -> let sub = defSubstB tps targs fields |> List.map (fun (fname, ft) -> - serializableReason defs (substTVarsB sub ft) + serializableReasonSeen (Set.add name seen) defs (substTVarsB sub ft) |> Result.mapError (fun e -> $"{name}.{fname}: {e}")) |> allOk |> Result.map (fun _ -> ()) | _ -> Error $"no def for record {name}" - | AST.TSum(name, targs) -> + | AST.TSum(name, targs) | AST.TRecord(name, targs) -> + if Set.contains name seen then Error $"recursive type {name}" else match Map.tryFind name defs with | Some(AST.SumTypeDef(_, tps, variants)) -> let sub = defSubstB tps targs @@ -911,13 +953,16 @@ let rec serializableReason (defs : Map) (t : AST.Type) : Re match v.Payload with | None -> Ok() | Some p -> - serializableReason defs (substTVarsB sub p) + serializableReasonSeen (Set.add name seen) defs (substTVarsB sub p) |> Result.mapError (fun e -> $"{name}.{v.Name}: {e}")) |> allOk |> Result.map (fun _ -> ()) | _ -> Error $"no def for sum {name}" | other -> Error $"{other}" +let serializableReason (defs : Map) (t : AST.Type) : Result = + serializableReasonSeen Set.empty defs t + let isSerializableType (defs : Map) (t : AST.Type) : bool = match serializableReason defs t with | Ok() -> true @@ -1091,17 +1136,27 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = err "builtin" $"{b.name}: arg count mismatch" else // stringify each arg per its wire type - let marshaled = + let marshaledR = List.map2 (fun w a -> match w with - | WAString -> a - | WAInt -> AST.Call("Stdlib.Int64.toString", AST.NonEmptyList.singleton a) - | WABool -> AST.Call("Stdlib.Bool.toString", AST.NonEmptyList.singleton a) - | WAFloat -> AST.Call("Stdlib.Float.toString", AST.NonEmptyList.singleton a) - | WAUnit -> AST.Let("__rpc_unit", a, AST.StringLiteral "unit")) + | WAString -> Ok a + | WAInt -> Ok(AST.Call("Stdlib.Int64.toString", AST.NonEmptyList.singleton a)) + | WABool -> Ok(AST.Call("Stdlib.Bool.toString", AST.NonEmptyList.singleton a)) + | WAFloat -> Ok(AST.Call("Stdlib.Float.toString", AST.NonEmptyList.singleton a)) + | WAUnit -> Ok(AST.Let("__rpc_unit", a, AST.StringLiteral "unit")) + // A container/custom type: encode it exactly as the daemon's + // wireToDvalTyped decodes. If it CAN'T be encoded (a recursive + // type like Json needs a recursive serializer fn, which doesn't + // exist yet), hard-fail the call. Falling back to the raw value + // silently emits wrong code — it sent a Json where the seam + // expects a String. + | WATyped t -> marshalTyped ctx.TypeDefs 0 t a) argWires bas + match allOk marshaledR with + | Error e -> err "builtin" $"{b.name}: arg {e}" + | Ok marshaled -> let request = (AST.StringLiteral b.name, marshaled) ||> List.fold (fun acc arg -> @@ -1402,6 +1457,7 @@ let rec freeTVars (t : AST.Type) : Set = /// any by-name refs both resolve). Generics are not yet supported. let bridgeFn (types : Map) + (typeDefs : Map) (values : Set) (valueErrors : Map) (effectful : Map) @@ -1415,7 +1471,8 @@ let bridgeFn Self = compiledName Values = values ValueErrors = valueErrors - Effectful = effectful } + Effectful = effectful + TypeDefs = typeDefs } let bridgedParams = paramList |> List.map (fun p -> bridgeType types p.typ |> Result.map (fun t -> (p.name, t))) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 001551c35e..50f324b41c 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -159,7 +159,17 @@ let rec private rtToMarshalable (t : TypeReference) : AST.Type option = | Some ab, Some bb -> Some(AST.TSum("Stdlib.Result.Result", [ ab; bb ])) | _ -> None | _ -> None - else None + else + // ANY other custom type: name it by hash and let marshalTyped/wireToDvalTyped + // dispatch on its DEFINITION (this map is built from the runtime and has no + // type env, so it can't tell record from sum — the def can). This is what + // lets a Json enum, a PosixError, etc. cross the seam. + args + |> List.map rtToMarshalable + |> fun bs -> + if List.forall Option.isSome bs then + Some(AST.TSum(Bridge.nameForType h, bs |> List.map Option.get)) + else None | _ -> None | _ -> None @@ -189,7 +199,11 @@ let private buildEffectfulMap // Uuid round-trips cleanly (Guid parse); DateTime args are omitted until // wire->DateTime ISO parsing is in (return-only for now). | TUuid -> Some Bridge.WAString - | _ -> None) + // Containers and custom types: marshalled with the same encoding the daemon + // decodes (wireToDvalTyped). Previously ANY non-scalar arg made a builtin + // unroutable, which is why altJsonFormat (arg: a Json enum) and ~300 others + // never compiled. + | other -> rtToMarshalable other |> Option.map Bridge.WATyped) let wireRet = match bfn.returnType with | TUnit -> Some Bridge.WRUnit @@ -200,12 +214,19 @@ let private buildEffectfulMap | TUuid -> Some Bridge.WRString | TDateTime -> Some Bridge.WRString | other -> - // General container returns (Option/Result/List of marshalable types); - // the recursive unmarshaller decodes them. Custom-enum payloads (needing - // the type-def env) return None here and stay unrouted. + // General container returns (Option/Result/List of marshalable types); the + // recursive unmarshaller decodes them. + // + // GATED on isMarshalableType, which is what unmarshalTyped can actually + // DECODE — a narrower set than rtToMarshalable can now express. Since + // rtToMarshalable started naming custom types (so they can be marshalled as + // ARGS), an ungated return would hand unmarshalTyped a record/enum, hit its + // `| _ -> src` fallthrough, and silently yield the raw wire string AS the + // value. The arg direction and the return direction have different + // capabilities; don't let one imply the other. match rtToMarshalable other with - | Some bt -> Some(Bridge.WRTyped bt) - | None -> None + | Some bt when Bridge.isMarshalableType bt -> Some(Bridge.WRTyped bt) + | _ -> None match wireRet with | Some ret when not (List.exists Option.isNone argWires) -> Some(name.name, (argWires |> List.map Option.get, ret)) @@ -430,9 +451,23 @@ let private buildPieces | Error e -> valueErrs <- valueErrs @ [ (h, e) ] let valuesMap = valueOk let valueErrors = Map.ofList valueErrs + // The emitted type defs, so a record/enum ARG can be marshalled into the + // wire format (marshalTyped dispatches on the def). + let emittedDefs = + match typeDefs with + | Ok tds -> + tds + |> List.choose (fun td -> + match td with + | AST.RecordDef(n, _, _) -> Some(n, td) + | AST.SumTypeDef(n, _, _) -> Some(n, td) + | AST.TypeAlias(n, _, _) -> Some(n, td)) + |> Map.ofList + | Error _ -> Map.empty let fnDefs = fns - |> List.map (fun (h, fn) -> Bridge.bridgeFn typeEnv valuesMap valueErrors effectful (Bridge.nameFor h) fn) + |> List.map (fun (h, fn) -> + Bridge.bridgeFn typeEnv emittedDefs valuesMap valueErrors effectful (Bridge.nameFor h) fn) |> allOk match typeDefs, fnDefs with | Error e, _ -> return Error e @@ -673,6 +708,27 @@ let private getHandle (id : int64) : Dval option = let private escWire (s : string) : string = s.Replace("\\", "\\\\").Replace("\n", "\\n") +/// Inverse of escWire. The daemon never needed this before: it only ever ESCAPED +/// (encoding a return), because every arg was a scalar. Custom-type args arrive +/// encoded, so they have to be decoded — left-to-right, so "\\\\n" is a literal +/// backslash followed by n, not a newline. +let private unescWire (s : string) : string = + let sb = System.Text.StringBuilder() + let mutable i = 0 + while i < s.Length do + if s[i] = '\\' && i + 1 < s.Length then + let appended = + match s[i + 1] with + | 'n' -> sb.Append('\n') + | '\\' -> sb.Append('\\') + | c -> sb.Append(c) + appended |> ignore + i <- i + 2 + else + sb.Append(s[i]) |> ignore + i <- i + 1 + sb.ToString() + /// Dval -> wire string. Scalars are literal; enums (Option/Result) recurse; a /// list becomes an opaque handle id (see handleTable) since the compiler can't /// build a native multi-element list on x64. @@ -758,6 +814,103 @@ let private wireToDval (t : TypeReference) (s : string) : Dval = | _ -> DString s | _ -> DString s +/// wire string -> Dval for ANY marshalable type, including records and enums — the +/// daemon-side mirror of Bridge.marshalTyped, and the inverse of dvalToWire. +/// +/// This is what lets compiled code pass a CUSTOM TYPE into a builtin. Until now the +/// seam only carried scalars in the arg direction, which is why `altJsonFormat` +/// (whose arg is a Json enum), cliExecute, fileRead and ~300 others couldn't route at +/// all. Async because it fetches type definitions. +/// +/// The encoding must match dvalToWire exactly: fields/elements escaped and joined by +/// "\n", records in NAME order, enums as `Case` or `Case\n`. +let rec private wireToDvalTyped (t : TypeReference) (s : string) : Ply = + uply { + let split (str : string) = if str = "" then [] else str.Split('\n') |> Array.toList + match t with + | TList inner -> + let mutable acc = [] + for part in split s do + let! v = wireToDvalTyped inner (unescWire part) + acc <- acc @ [ v ] + let vt = acc |> List.tryHead |> Option.map Dval.toValueType |> Option.defaultValue ValueType.Unknown + return DList(vt, acc) + | TTuple(a, b, rest) -> + let parts = split s + let ts = a :: b :: rest + let mutable acc = [] + for (ty, part) in List.zip (ts |> List.truncate (List.length parts)) (parts |> List.truncate (List.length ts)) do + let! v = wireToDvalTyped ty (unescWire part) + acc <- acc @ [ v ] + match acc with + | x :: y :: r -> return DTuple(x, y, r) + | _ -> return DString s + | TCustomType(nr, targs) -> + match nr.resolved with + | Error _ -> return DString s + | Ok(FQTypeName.Package(Hash h)) -> + // Option/Result are the compiler's native sums; they encode by case name. + if h = Bridge.optionTypeHash then + match targs with + | [ inner ] -> + if s = "None" then + return DEnum(FQTypeName.Package(Hash h), FQTypeName.Package(Hash h), [], "None", []) + else + let payload = if s.StartsWith "Some\n" then s.Substring 5 else "" + let! v = wireToDvalTyped inner (unescWire payload) + return DEnum(FQTypeName.Package(Hash h), FQTypeName.Package(Hash h), [], "Some", [ v ]) + | _ -> return DString s + elif h = Bridge.resultTypeHash then + match targs with + | [ okT; errT ] -> + let isOk = s.StartsWith "Ok\n" + let payload = if isOk then s.Substring 3 else (if s.StartsWith "Error\n" then s.Substring 6 else "") + let! v = wireToDvalTyped (if isOk then okT else errT) (unescWire payload) + return + DEnum( + FQTypeName.Package(Hash h), + FQTypeName.Package(Hash h), + [], + (if isOk then "Ok" else "Error"), + [ v ] + ) + | _ -> return DString s + else + let! tOpt = LibDB.PackageManager.rt.getType (FQTypeName.package h) + match tOpt with + | None -> return DString s + | Some pt -> + let name = FQTypeName.Package(Hash h) + match pt.declaration.definition with + | TypeDeclaration.Alias inner -> return! wireToDvalTyped inner s + | TypeDeclaration.Record fields -> + // NAME order — dvalToWire emits a DvalMap, which iterates sorted. + let fs = NEList.toList fields |> List.sortBy (fun f -> f.name) + let parts = split s + let mutable acc = [] + for (f, part) in List.zip (fs |> List.truncate (List.length parts)) (parts |> List.truncate (List.length fs)) do + let! v = wireToDvalTyped f.typ (unescWire part) + acc <- acc @ [ (f.name, v) ] + return DRecord(name, name, [], Map.ofList acc) + | TypeDeclaration.Enum cases -> + let lines = split s + match lines with + | [] -> return DString s + | caseName :: fieldParts -> + match NEList.toList cases |> List.tryFind (fun c -> c.name = caseName) with + | None -> return DString s + | Some c -> + let mutable acc = [] + for (ft, part) in + List.zip + (c.fields |> List.truncate (List.length fieldParts)) + (fieldParts |> List.truncate (List.length c.fields)) do + let! v = wireToDvalTyped ft (unescWire part) + acc <- acc @ [ v ] + return DEnum(name, name, [], caseName, acc) + | scalar -> return wireToDval scalar s + } + /// Dispatch one request ("name\narg1\narg2…") to the real builtin, return the /// wire response. let private dispatchBuiltin @@ -825,11 +978,15 @@ let private dispatchBuiltin | None -> return $"ERR:no-builtin:{name}" | Some bfn -> let n = min bfn.parameters.Length wireArgs.Length - let dvalArgs = - List.map2 - (fun (p : BuiltInParam) (a : string) -> wireToDval p.typ a) - (List.truncate n bfn.parameters) - (List.truncate n wireArgs) + // wireToDvalTyped, not wireToDval: an arg can now be a container or a custom + // type (see WATyped), which needs the recursive decoder + type defs. The old + // scalar-only path silently produced `DString s` for anything else — that is + // exactly how every TInt arg became a string and intRandom returned garbage. + let mutable dvalArgs = [] + for (p : BuiltInParam, a : string) in + List.zip (List.truncate n bfn.parameters) (List.truncate n wireArgs) do + let! v = wireToDvalTyped p.typ a + dvalArgs <- dvalArgs @ [ v ] // A builtin that raises (e.g. a capability check, a bad arg) must still // produce a response, or the compiled program polls the response file // forever. Return an error marker instead of letting it propagate. @@ -1557,7 +1714,7 @@ let fns () : List = [ { name = "b"; typ = PT.TInt64; description = "" } ] returnType = PT.TInt64 description = "" } - match Bridge.bridgeFn Map.empty Set.empty Map.empty Map.empty "bridgedFn" ptFn with + match Bridge.bridgeFn Map.empty Map.empty Set.empty Map.empty Map.empty "bridgedFn" ptFn with | Error e -> outcome false $"bridge: {e}" |> Ply | Ok fd -> let program : AST.Program = From 4fb13539b9ae301156fbacc3f56f5ecb61e28493 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 02:40:37 -0400 Subject: [PATCH 149/172] =?UTF-8?q?compiler:=20recursive=20serializer=20fn?= =?UTF-8?q?s=20=E2=80=94=20JSON=20now=20crosses=20the=20seam?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit marshalTyped INLINES the serializer, so a recursive type could never be encoded: Stdlib.AltJson.Json is `... | Array of List`, and expanding it generated AST forever (it core-dumped the CLI before the guard). That blocked altJsonFormat, and with it ~98 fns. Emit ONE marshaller function per non-generic type instead — `__marshal.(v: T) : String` — so recursion becomes a CALL and terminates. Its body is the only place a type expands inline (inFnBody=true); every nested custom type inside it becomes a call to that type's own marshaller. serializableReason agrees: once a non-generic type is seen, stop descending — the fn calls itself. Generic types are deliberately skipped: their marshaller needs a marshalling fn per type param (higher-order), which isn't built. They stay inline, which is correct as long as they aren't recursive — and the guard still catches it if they are. Result: altJsonFormat ROUTES. Of 25 previously altJson-blocked fns, 3 compile and the rest moved on to a genuinely different blocker: 15 unsupported-builtin: stringToBlob_v0 2 unsupported-builtin: blobToBytes_v0 i.e. Bytes through the seam is now the JSON bottleneck, not recursion. fib still matches; bridge and marshal self-tests green. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 59 +++++++++++++++++-- .../Builtins.Compiler/Libs/Compiler.fs | 6 +- 2 files changed, 60 insertions(+), 5 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 8d51dcff5a..5b6960987c 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -746,7 +746,15 @@ let defSubstB (tps : string list) (args : AST.Type list) : Map /// /// Must stay byte-identical to dvalToWire: elements/fields escaped and joined by /// "\n", enums as `Case` or `Case\n`, Unit as "unit". +/// The marshaller emitted for a non-generic type. A recursive type (Json = ... | +/// Array of List) cannot be encoded by an INLINE expression — inlining it +/// generates AST forever. Emit one real function per type instead, so recursion +/// becomes a CALL and terminates naturally. +/// Dotted, like every other name we hand the compiler (it splits mangled names on '_'). +let marshalFnName (typeName : string) : string = "__marshal." + typeName + let rec marshalTypedSeen + (inFnBody : bool) (seen : Set) (defs : Map) (d : int) @@ -761,7 +769,8 @@ let rec marshalTypedSeen let recursionGuard (name : string) = if Set.contains name seen then Some(Error $"recursive type {name} (needs a recursive serializer fn)") else None - let marshalTyped d t v = marshalTypedSeen seen defs d t v + // nested positions are never "in the fn body we're generating" + let marshalTyped d t v = marshalTypedSeen false seen defs d t v let call n args = AST.Call(n, AST.NonEmptyList.fromList args) let esc e = call "Stdlib.hostRpcEscape" [ e ] let join xs sep = call "Stdlib.String.join" [ xs; AST.StringLiteral sep ] @@ -833,6 +842,12 @@ let rec marshalTypedSeen // TRecord or TSum. Callers that know a type only by hash (rtToMarshalable, which is // built from the runtime and has no type env) can't tell record from sum — but the // def can, so accept either tag and let the def decide. + // A non-generic custom type is marshalled by its emitted fn — one definition, + // called wherever needed, so recursion terminates. `inFnBody` is the one place we + // expand inline: when GENERATING that fn's own body. + | (AST.TRecord(name, []) | AST.TSum(name, [])) when + not inFnBody && (match Map.tryFind name defs with Some _ -> true | None -> false) -> + Ok(AST.Call(marshalFnName name, AST.NonEmptyList.singleton v)) | AST.TRecord(name, targs) | AST.TSum(name, targs) when (match Map.tryFind name defs with | Some(AST.RecordDef _) -> true @@ -843,7 +858,7 @@ let rec marshalTypedSeen match Map.tryFind name defs with | Some(AST.RecordDef(_, tps, fields)) -> let sub = defSubstB tps targs - let inner d t v = marshalTypedSeen (Set.add name seen) defs d t v + let inner d t v = marshalTypedSeen false (Set.add name seen) defs d t v fields |> List.sortBy fst |> List.map (fun (fname, ft) -> @@ -865,7 +880,7 @@ let rec marshalTypedSeen match Map.tryFind name defs with | Some(AST.SumTypeDef(_, tps, variants)) -> let sub = defSubstB tps targs - let marshalTyped d t v = marshalTypedSeen (Set.add name seen) defs d t v + let marshalTyped d t v = marshalTypedSeen false (Set.add name seen) defs d t v variants |> List.map (fun (variant : AST.Variant) -> match variant.Payload with @@ -908,7 +923,40 @@ let rec marshalTypedSeen | other -> Error $"marshal: {other}" let marshalTyped (defs : Map) (d : int) (t : AST.Type) (v : AST.Expr) = - marshalTypedSeen Set.empty defs d t v + marshalTypedSeen false Set.empty defs d t v + +/// One marshaller FunctionDef per non-generic type def: `__marshal.T(v: T) : String`. +/// Its body expands T inline (inFnBody=true) while every nested custom type becomes a +/// call — so a recursive type emits a finite, self-referential function. +/// Generic types are skipped: their marshaller would need a marshalling fn per type +/// param (higher-order), which isn't built yet — they stay inline, which is fine as +/// long as they aren't recursive. +let marshalFnDefs (defs : Map) : List = + defs + |> Map.toList + |> List.choose (fun (name, def) -> + let tps = + match def with + | AST.RecordDef(_, tps, _) -> Some tps + | AST.SumTypeDef(_, tps, _) -> Some tps + | AST.TypeAlias _ -> None + match tps with + | Some [] -> + let selfT = + match def with + | AST.SumTypeDef _ -> AST.TSum(name, []) + | _ -> AST.TRecord(name, []) + match marshalTypedSeen true Set.empty defs 0 selfT (AST.Var "v") with + | Ok body -> + Some( + { Name = marshalFnName name + TypeParams = [] + Params = AST.NonEmptyList.singleton ("v", selfT) + ReturnType = AST.TString + Body = body } : AST.FunctionDef + ) + | Error _ -> None + | _ -> None) /// Can marshalTyped encode this type — and if NOT, WHY? Returning a reason rather /// than a bool matters: "unprovable: TRecord(T.a6fa…)" tells you nothing, and a vague @@ -928,6 +976,9 @@ let rec serializableReasonSeen | AST.TTuple ts -> all ts | AST.TSum("Stdlib.Option.Option", [ inner ]) -> serializableReason defs inner | AST.TSum("Stdlib.Result.Result", [ a; b ]) -> all [ a; b ] + // A non-generic type is serialized via its emitted marshaller fn, so recursion is + // fine — stop descending once we've seen it (the fn calls itself). + | (AST.TRecord(name, []) | AST.TSum(name, [])) when Set.contains name seen -> Ok() | AST.TRecord(name, targs) | AST.TSum(name, targs) when (match Map.tryFind name defs with | Some(AST.RecordDef _) -> true diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 50f324b41c..df00c78daf 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -474,7 +474,11 @@ let private buildPieces | _, Error e -> return Error e // The value fns go in alongside the bridged fns — one definition each, // shared by every reference. - | Ok tds, Ok fds -> return Ok(tds, valueDefs @ fds, Bridge.nameFor rootHash) + | Ok tds, Ok fds -> + // One marshaller fn per non-generic type, so a record/enum ARG (and a + // RECURSIVE type like Json) can cross the seam: recursion becomes a call. + let marshallers = Bridge.marshalFnDefs emittedDefs + return Ok(tds, marshallers @ valueDefs @ fds, Bridge.nameFor rootHash) } /// Substitute type variables (used to instantiate a generic root fn's type From ed7b0757176737f9815cb37c499e9ef38ae2f275 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 03:08:39 -0400 Subject: [PATCH 150/172] compiler: un-route 3 String fns that were silently wrong on non-ASCII MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The equivalence harness, pointed at a non-ASCII input, found three routed builtins that are NOT equivalent to their "native" counterparts. Each returned a wrong answer in compiled code; ASCII hid all three completely: Stdlib.String.length "héllo日本" -> compiled 12, interpreted 7 The compiler's String.length counts UTF-8 BYTES (it reads the length prefix; __string_hash loops it with getByteAt). Dark counts CHARACTERS. Stdlib.String.toUppercase "héllo" -> compiled "HéLLO", interpreted "HÉLLO" Stdlib.String.toLowercase "HÉLLO" -> compiled "hÉllo", interpreted "héllo" The compiler's case conversion is ASCII-only. Un-route all three. This costs NOTHING: Dark's own implementations compile fine and are unicode-correct, so all four cases now match. The "optimization" of substituting the compiler's native versions WAS the bug — exactly the trap the REALLY-equivalent rule exists to catch, and my own routing table walked into it. Also fixes a blast-radius bug I introduced with the recursive serializers: marshalFnDefs emitted a `__marshal.T` fn for EVERY type into EVERY program, so a single marshaller that failed to typecheck broke fns that never marshal anything (11 of 60 sampled). Now only marshallers actually reachable from the bridged fns are emitted, closed transitively (marshalCallsInExpr). That recovers all 10 real losses — 59/60, and the 1 is a fn that compiles in 34s against the test's 25s timeout. Note the ordering trap for anyone auditing: the 11 losses looked like they came from un-routing (same commit window). They didn't. Correctness cost zero coverage. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 62 +++++++++++++++++-- .../Builtins.Compiler/Libs/Compiler.fs | 5 +- 2 files changed, 62 insertions(+), 5 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 5b6960987c..331b3d000c 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -179,7 +179,17 @@ let builtinToStdlib : Map = // (same shape as a routed stdlib call) is exactly what the compiler wants. "unwrap", "Builtin.unwrap" // String - "stringLength", "Stdlib.String.length" + // NOT ROUTED — verified NOT equivalent, each a silent wrong answer on non-ASCII + // (found by the equivalence harness with a non-ASCII input; ASCII hides all three): + // stringLength -> compiler's String.length counts UTF-8 BYTES (it reads the + // length prefix; __string_hash loops it with getByteAt), + // Dark counts CHARACTERS. "héllo日本" -> 12 vs 7. + // stringToUppercase -> compiler's toUpperCase is ASCII-only: "héllo" -> "HéLLO", + // Dark gives "HÉLLO". + // stringToLowercase -> same, ASCII-only: "HÉLLO" -> "hÉllo" vs "héllo". + // Routing these made compiled code return wrong answers rather than fail. Leave + // them unrouted (those fns just don't compile) until the compiler's String stdlib + // is unicode-aware. "stringIsEmpty", "Stdlib.String.isEmpty" "stringContains", "Stdlib.String.contains" "stringJoin", "Stdlib.String.join" @@ -189,8 +199,6 @@ let builtinToStdlib : Map = "stringTrimStart", "Stdlib.String.trimStart" "stringTrimEnd", "Stdlib.String.trimEnd" "stringReverse", "Stdlib.String.reverse" - "stringToLowercase", "Stdlib.String.toLowerCase" - "stringToUppercase", "Stdlib.String.toUpperCase" "stringStartsWith", "Stdlib.String.startsWith" "stringEndsWith", "Stdlib.String.endsWith" "stringPrepend", "Stdlib.String.prepend" @@ -925,15 +933,49 @@ let rec marshalTypedSeen let marshalTyped (defs : Map) (d : int) (t : AST.Type) (v : AST.Expr) = marshalTypedSeen false Set.empty defs d t v +/// Which marshallers does this expression actually call? Emitting a marshaller for +/// EVERY type put a `__marshal.T` fn into every program — and one that fails to +/// typecheck breaks programs that never marshal anything (it cost 11 of 60 sampled +/// fns). Emit only what's reachable. +let rec marshalCallsInExpr (e : AST.Expr) : Set = + let r = marshalCallsInExpr + let many xs = xs |> List.map r |> Set.unionMany + match e with + | AST.Call(n, args) -> + let here = + if n.StartsWith "__marshal." then Set.singleton (n.Substring 10) else Set.empty + Set.union here (many (AST.NonEmptyList.toList args)) + | AST.TypeApp(_, _, args) -> many (AST.NonEmptyList.toList args) + | AST.Apply(f, args) -> Set.union (r f) (many (AST.NonEmptyList.toList args)) + | AST.Let(_, v, b) -> Set.union (r v) (r b) + | AST.If(c, t, e2) -> Set.unionMany [ r c; r t; r e2 ] + | AST.BinOp(_, a, b) -> Set.union (r a) (r b) + | AST.UnaryOp(_, a) -> r a + | AST.Lambda(_, b) -> r b + | AST.Match(s2, cases) -> + Set.union (r s2) (cases |> List.map (fun (c : AST.MatchCase) -> r c.Body) |> Set.unionMany) + | AST.RecordLiteral(_, fs) -> many (List.map snd fs) + | AST.RecordAccess(rec_, _) -> r rec_ + | AST.RecordUpdate(rec_, ups) -> Set.union (r rec_) (many (List.map snd ups)) + | AST.Constructor(_, _, p) -> p |> Option.map r |> Option.defaultValue Set.empty + | AST.TupleLiteral xs -> many xs + | AST.TupleAccess(t, _) -> r t + | AST.ListLiteral xs -> many xs + | AST.ListCons(hs, t) -> Set.union (many hs) (r t) + | AST.Closure(_, caps) -> many caps + | AST.InterpolatedString _ -> Set.empty // interpolations can't contain a marshaller call + | _ -> Set.empty + /// One marshaller FunctionDef per non-generic type def: `__marshal.T(v: T) : String`. /// Its body expands T inline (inFnBody=true) while every nested custom type becomes a /// call — so a recursive type emits a finite, self-referential function. /// Generic types are skipped: their marshaller would need a marshalling fn per type /// param (higher-order), which isn't built yet — they stay inline, which is fine as /// long as they aren't recursive. -let marshalFnDefs (defs : Map) : List = +let marshalFnDefsFor (defs : Map) (needed : Set) : List = defs |> Map.toList + |> List.filter (fun (name, _) -> Set.contains name needed) |> List.choose (fun (name, def) -> let tps = match def with @@ -958,6 +1000,18 @@ let marshalFnDefs (defs : Map) : List = | Error _ -> None | _ -> None) +/// Transitively close the set: a marshaller's body may call other marshallers. +let marshalFnDefs (defs : Map) (seed : Set) : List = + let mutable needed = seed + let mutable changed = true + while changed do + let fns = marshalFnDefsFor defs needed + let more = + fns |> List.map (fun f -> marshalCallsInExpr f.Body) |> Set.unionMany |> Set.union needed + changed <- more <> needed + needed <- more + marshalFnDefsFor defs needed + /// Can marshalTyped encode this type — and if NOT, WHY? Returning a reason rather /// than a bool matters: "unprovable: TRecord(T.a6fa…)" tells you nothing, and a vague /// bucket is exactly what hid the last two big blockers. Name the culprit instead. diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index df00c78daf..635e43ffa8 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -477,7 +477,10 @@ let private buildPieces | Ok tds, Ok fds -> // One marshaller fn per non-generic type, so a record/enum ARG (and a // RECURSIVE type like Json) can cross the seam: recursion becomes a call. - let marshallers = Bridge.marshalFnDefs emittedDefs + // Only the marshallers actually referenced by the bridged fns (+ whatever + // those transitively call). Emitting one per type polluted every program. + let seed = fds |> List.map (fun f -> Bridge.marshalCallsInExpr f.Body) |> Set.unionMany + let marshallers = Bridge.marshalFnDefs emittedDefs seed return Ok(tds, marshallers @ valueDefs @ fds, Bridge.nameFor rootHash) } From 3b78cdbca89ae15cd802766045e4f01db60f2a73 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 04:21:32 -0400 Subject: [PATCH 151/172] =?UTF-8?q?compiler:=20Bytes=20through=20the=20sea?= =?UTF-8?q?m=20=E2=80=94=20route=20stringToBlob,=20marshal=20TBytes=20(+8)?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Adds a native `Stdlib.String.toBytes` and routes the `stringToBlob` builtin to it, then teaches every marshalling site about TBytes so Blob-typed values can actually cross the seam and be *proven*, not just compiled. Why it's sound: a compiler String is already stored as UTF-8 bytes behind a length prefix — which is exactly what `String.length` (the prefix) and `getByteAt` (raw byte at index) read, as `__string_hash` demonstrates by FNV-1a'ing over that same range. So toBytes is a byte copy, and matches Encoding.UTF8.GetBytes. Verified on the cases that discriminate: é=C3A9, 日=E697A5, 😀=F09F9880, plus ASCII and empty — all `match`. Had the compiler been emitting char codes, é would be [233] vs [195,169] and diffed. Four sites had to agree, and each was a separate silent failure mode: - dvalToWire — DBlob(Ephemeral) -> byte values, one per line (same shape as DList). Persistent resolves through state.blobs (IO) and dvalToWire is pure, so it stays on the ?unmarshalable marker: unprovable, never guessed. - marshalTypedSeen — reuse the TList encoder over Bytes.toList rather than writing a second encoding to keep in sync. - serializableReason — the provability gate. Without it the fns compiled and reported `unprovable|TBytes`: coverage with no proof, which is not a win. - isMarshalableType + unmarshalTyped — widening the return gate made unmarshalTyped's "unreachable" `| _ -> src` fallthrough REACHABLE, which would hand compiled code the raw wire String typed as Bytes. Added the decoder in the same change; the two must move together. blobToBytes is deliberately NOT routed: it returns List where the native Bytes.toList returns List. Same bytes, different element type — the difference would be invisible until it wasn't. Verified: aligned per-hash sweep over all 3900, rows=3900, **0 regressions**, +8 (2088 -> 2096). Both halves measured under the same two-phase regime (chunk 200/600s then a 25/2400s repair); 75 hashes remain unmeasured on BOTH sides (the known compile-for-minutes outliers, task #20) and count as False, so this understates rather than overstates. Of the 8 gains, 7 are proven byte-identical to the interpreter; the 8th (Discord.buildBody) is a bare-`None` inferred as Option against an Option field — the known bare-polymorphic-literal gap (task #16), unmasked rather than filed under a vague bucket. Worth noting it counts True in the coverage sweep but cannot be built into a runnable program, so "compiles" overcounts a little. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 38 +++++++++++++++++-- .../Builtins.Compiler/Libs/Compiler.fs | 10 +++++ backend/src/LibCompiler/stdlib/String.dark | 16 ++++++++ 3 files changed, 61 insertions(+), 3 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 331b3d000c..7e1301976c 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -358,6 +358,14 @@ let builtinToStdlib : Map = "intToFloat", "Stdlib.Int64.toFloat" "int64ToFloat", "Stdlib.Int64.toFloat" "floatSqrt", "Stdlib.Float.sqrt" + // Bytes. stringToBlob is a UTF-8 encode; the compiler stores a String as UTF-8 + // bytes already, so Stdlib.String.toBytes (added for this) is a byte copy and + // matches Encoding.UTF8.GetBytes exactly. Verified on non-ASCII. + // + // blobToBytes is deliberately NOT routed: it returns List, while the + // native Stdlib.Bytes.toList returns List. Same bytes, different element + // type -> not equivalent, and the difference would be invisible until it wasn't. + "stringToBlob", "Stdlib.String.toBytes" // Int64 (full) "int64LessThan", "Stdlib.Int64.lessThan" "int64GreaterThan", "Stdlib.Int64.greaterThan" @@ -714,7 +722,7 @@ let rec private bindPattern /// Whether a bridged return type can be recursively unmarshaled from the wire. let rec isMarshalableType (t : AST.Type) : bool = match t with - | AST.TString | AST.TInt64 | AST.TBool | AST.TUnit -> true + | AST.TString | AST.TInt64 | AST.TBool | AST.TUnit | AST.TBytes -> true | AST.TSum("Stdlib.Option.Option", [ inner ]) -> isMarshalableType inner | AST.TSum("Stdlib.Result.Result", [ a; b ]) -> isMarshalableType a && isMarshalableType b | AST.TList inner -> isMarshalableType inner @@ -804,6 +812,13 @@ let rec marshalTypedSeen |> Result.map (fun body -> let lam = AST.Lambda(AST.NonEmptyList.fromList [ (ev, inner) ], esc body) join (AST.TypeApp("Stdlib.List.map", [ inner; AST.TString ], AST.NonEmptyList.fromList [ v; lam ])) "\n") + // Bytes marshal exactly like List: the daemon's dvalToWire emits a Blob's + // byte values one per line, so decompose with the native Stdlib.Bytes.toList and + // reuse the TList encoder above rather than writing a second encoding to keep in + // sync. Note Bytes.toList yields Int64, not UInt8 -- that mismatch is exactly why + // the blobToBytes builtin is NOT routed; here it's internal to the wire format and + // both sides agree on the digits, so it's sound. + | AST.TBytes -> marshalTyped d (AST.TList AST.TInt64) (call "Stdlib.Bytes.toList" [ v ]) | AST.TTuple ts -> // Tuples have no generic map; index each slot and concat with "\n". ts @@ -1025,7 +1040,12 @@ let rec serializableReasonSeen match t with | AST.TString | AST.TChar | AST.TBool | AST.TUnit | AST.TFloat64 | AST.TInt8 | AST.TInt16 | AST.TInt32 | AST.TInt64 - | AST.TUInt8 | AST.TUInt16 | AST.TUInt32 | AST.TUInt64 -> Ok() + | AST.TUInt8 | AST.TUInt16 | AST.TUInt32 | AST.TUInt64 + // Bytes is serializable unconditionally: marshalTypedSeen encodes it as its byte + // values via Stdlib.Bytes.toList, mirroring dvalToWire's DBlob case. Kept in step + // with isMarshalableType and marshalTypedSeen -- all three must agree on TBytes or + // a fn is either falsely unprovable (here) or falsely gated (there). + | AST.TBytes -> Ok() | AST.TList inner -> serializableReason defs inner | AST.TTuple ts -> all ts | AST.TSum("Stdlib.Option.Option", [ inner ]) -> serializableReason defs inner @@ -1118,7 +1138,19 @@ let rec unmarshalTyped (d : int) (t : AST.Type) (src : AST.Expr) : AST.Expr = AST.BinOp(AST.Eq, r, AST.StringLiteral ""), AST.ListLiteral [], AST.TypeApp("Stdlib.List.map", [ AST.TString; inner ], AST.NonEmptyList.fromList [ split; lam ]))) - | _ -> src // unreachable: buildEffectfulMap only routes isMarshalableType returns + // The exact inverse of marshalTypedSeen's TBytes case: the wire is the byte values + // one per line, so reuse the TList decoder (which already maps "" -> []) and rebuild + // with the native Bytes.fromList; the empty wire lands on Bytes.create(0). + | AST.TBytes -> + AST.Call( + "Stdlib.Bytes.fromList", + AST.NonEmptyList.fromList [ unmarshalTyped d (AST.TList AST.TInt64) src ]) + // Anything else is a BUG, not a value: `src` is the raw wire String, so returning it + // here hands compiled code a String bit-pattern typed as something else. This stays + // sound only while every isMarshalableType case above has a decoder -- adding a type + // to isMarshalableType without adding it here silently reintroduces that. (TBytes was + // exactly that: widening the gate made this "unreachable" line reachable.) + | _ -> src /// Unmarshal a host-RPC wire response into a native value per its return wire /// type. Scalars are decoded inline; every container routes through the recursive diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 635e43ffa8..ee3209e0cc 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -779,6 +779,16 @@ let rec private dvalToWire (d : Dval) : string = | DUnit -> "unit" | DFloat f -> string f | DChar c -> c + // A Blob marshals as its byte VALUES, one per line -- the same shape as a + // List, which is exactly what the compiled side emits via + // Stdlib.Bytes.toList. Empty blob -> "" -> [], matching the DList encoding. + // + // Only Ephemeral is encodable here: a Persistent blob is a content hash that + // resolves through state.blobs, which is IO, and dvalToWire is pure. Persistent + // therefore falls through to the ?unmarshalable marker below and is reported as + // `unprovable` rather than guessed at. + | DBlob(Ephemeral eph) -> + eph.bytes |> Array.toList |> List.map (string >> escWire) |> String.concat "\n" // Host-opaque types -> canonical string (see Bridge.bridgeType for soundness). | DUuid g -> string g | DDateTime dt -> LibExecution.DarkDateTime.toIsoString dt diff --git a/backend/src/LibCompiler/stdlib/String.dark b/backend/src/LibCompiler/stdlib/String.dark index 6a05014337..0d2e5d8ed2 100644 --- a/backend/src/LibCompiler/stdlib/String.dark +++ b/backend/src/LibCompiler/stdlib/String.dark @@ -540,3 +540,19 @@ def Stdlib.String.padEnd(s: String, targetLen: Int64, padChar: String) : String // ============================================================================= + +// UTF-8 encode a string into Bytes. +// +// This is a byte copy, not a conversion: a String is already stored as UTF-8 bytes +// behind an 8-byte length prefix, which is exactly what String.length (the prefix) +// and String.getByteAt (raw byte at index) read — see __string_hash, which FNV-1a's +// over the same range. So this matches Dark's Builtin.stringToBlob +// (System.Text.Encoding.UTF8.GetBytes) byte for byte. +def Stdlib.String.toBytes(s: String) : Bytes = + Stdlib.Bytes.fromList(Stdlib.String.__toBytesHelper(s, 0, [])) + +def Stdlib.String.__toBytesHelper(s: String, idx: Int64, acc: List) : List = + if idx >= Stdlib.String.length(s) then + Stdlib.List.reverse(acc) + else + Stdlib.String.__toBytesHelper(s, idx + 1, [Stdlib.String.getByteAt(s, idx), ...acc]) From e5b17c4dbf80b51fca3897f9ed7d5dd2659ffb13 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 04:36:13 -0400 Subject: [PATCH 152/172] compiler: equiv harness never emitted the RETURN type's marshaller MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit buildPieces seeds marshaller reachability from the bridged fn BODIES, but equivOne builds its return-marshalling expression afterwards — so any `__marshal.X` that expression calls had no def, and the program died with "no variable named __marshal.T.". That failure reported as `cf|compile:`, i.e. it looked like the FUNCTION didn't compile, when the function compiles fine (the coverage sweep counts these True) and it was the harness's own wrapper that didn't. So the harness was silently under-reporting what it could prove, in a bucket that pointed at the wrong culprit. Fix: close the marshaller set over the return-marshalling expr too, dropping anything buildPieces already emitted (a duplicate def is itself a compile error). Verified on the 8 fns this branch just unblocked: 5 went `cf|compile: no variable named __marshal.T.4d68…` -> `match`. 7 of 8 now proven byte-identical; the 8th is a real bare-`None` inference gap (task #16), not this. --- .../Builtins/Builtins.Compiler/Libs/Compiler.fs | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index ee3209e0cc..ab4d7b66e5 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -1283,7 +1283,20 @@ let private equivOne match Bridge.marshalTyped defsByName 0 retType entry with | Error e -> return "unprovable|" + e | Ok marshalled -> - match compileClosure typeDefs fds marshalled with + // buildPieces seeds marshaller reachability from the bridged fn + // BODIES, but this return-marshalling expr is built afterwards and + // calls __marshal.X for the return type -- so those defs were never + // emitted and the program failed with "no variable named + // __marshal.T.". That masqueraded as a compile failure for fns + // that do compile (the coverage sweep counts them True), so the + // harness under-reported what it could prove. Close over `marshalled` + // too, dropping anything buildPieces already emitted (a duplicate def + // is itself a compile error). + let have = fds |> List.map (fun f -> f.Name) |> Set.ofList + let extraMarshallers = + Bridge.marshalFnDefs defsByName (Bridge.marshalCallsInExpr marshalled) + |> List.filter (fun d -> not (Set.contains d.Name have)) + match compileClosure typeDefs (fds @ extraMarshallers) marshalled with | Error e -> return "cf|compile: " + e | Ok binary -> let (daemon, shutdown) = startDaemon exeState vm From d83e2af80a243987156997fee993795803d1f7e6 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 05:09:07 -0400 Subject: [PATCH 153/172] compiler: floats cross the seam as exact bits, not as a lossy rendering MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The equivalence sweep reported Stdlib.Int.toFloat as a DIFF — `c=5.0` vs `i=5` — while both engines held the identical value. The wire was comparing RENDERINGS: dvalToWire used F#'s `string f` ("5") against the compiler's Stdlib.Float.toString ("5.0"). The wire is a comparison medium, not Dark semantics. Its only job is `same value <-> same bytes`, and no rendering does that here: - F#'s `string f` isn't Dark's float repr at all. - Dark's own floatToString is G12-LOSSY, so 123456789012345.0 and 123456789012346.0 render identically — a rendering wire cannot see a miscompile it cannot print. It also appends ".0" to exponent form, emitting the malformed "1e+13.0". - The compiler's Float.toString builds from intPart/fracPart and disagrees with both. So floats now travel as their IEEE-754 bit pattern (marshalTyped, WAFloat, dvalToWire, wireToDval). Exact, total, and NaN/Inf/-0.0 fall out for free. This also fixes the ARG direction, where a Float handed to a real builtin through the seam previously arrived rounded to 12 significant digits — and, past Float.toInt's range, as garbage. Sent as two 32-bit halves ("hi:lo") to route around TWO real codegen bugs in LibCompiler, both now documented in PROGRESSION-LOG.md and filed as task #22: 1. Unsigned comparisons are SIGNED — MIR.Lt lowers to LIR.LT (setl) with no operand-type awareness, so UInt64.toString returns a bare "?" for any n >= 2^63, which is every negative float's bit pattern. Proof: 5.0 (0x4014…) renders; -5.0 (0xC014…) gives "?". 2. `AND r/m64, imm32` sign-extends, so `b &&& 0xFFFFFFFFUL` is a no-op and the compiled side returned all 64 bits as the low half. Hence `lo = b - ((b >> 32) << 32)`. Both halves are < 2^32, so they stringify correctly under signed comparison. Neither bug is fixed here — each is a deep change and neither was blocking; worth doing properly. Verified: Int.toFloat over 9 values (negatives, 1e13, 15-significant-digit, ±) all `match`, was DIFF. All 40 Float package fns: 23 match, 0 DIFF (the 16 cf are pre-existing unsupported-builtin/type blockers). Aligned per-hash sweep over all 3900: rows=3900, 0 regressions, 0 gains — coverage is untouched, which is what a wire-format change should do. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 59 ++++++++++++++++++- .../Builtins.Compiler/Libs/Compiler.fs | 20 ++++++- 2 files changed, 75 insertions(+), 4 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 7e1301976c..ecd49b6fec 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -803,7 +803,42 @@ let rec marshalTypedSeen | AST.TUInt32 -> Ok(call "Stdlib.UInt32.toString" [ v ]) | AST.TUInt64 -> Ok(call "Stdlib.UInt64.toString" [ v ]) | AST.TBool -> Ok(call "Stdlib.Bool.toString" [ v ]) - | AST.TFloat64 -> Ok(call "Stdlib.Float.toString" [ v ]) + // A Float travels as its IEEE-754 BIT PATTERN, not as text. The wire is a comparison + // medium, not Dark semantics: its only job is `same value <-> same bytes`, and a + // rendering cannot do that. Stdlib.Float.toString here is 12-significant-digit lossy, + // so 123456789012345.0 and 123456789012346.0 render IDENTICALLY -- a rendering wire + // can't see a miscompile it can't print. Bits are exact, and make NaN/Inf/-0.0 fall + // out for free. Mirrored by dvalToWire's DFloat and wireToDval's TFloat. + | AST.TFloat64 -> + // Sent as two 32-bit HALVES, "hi:lo", not one UInt64. + // + // The compiler's unsigned comparisons are SIGNED: MIR.Lt lowers to LIR.LT (setl) + // with no operand-type awareness. So Stdlib.UInt64.toString -- `if n < 10UL then + // digit else recurse(n/10)` -- takes the `n < 10UL` branch for any n >= 2^63 (which + // reads as negative) and returns __digitToString's `| _ -> "?"` fallthrough. Every + // NEGATIVE float sets the sign bit, so its bits exceed 2^63 and stringified as a + // bare "?". Proven: 5.0 (0x4014…, < 2^63) renders fine, -5.0 (0xC014…) gives "?". + // + // Both halves are < 2^32, hence < 2^63, so they stringify correctly under signed + // comparison. `>>` is a logical shift here (Float.__isNegative relies on that for + // `bits >> 63UL == 1UL`). Fixing the codegen properly is the real answer -- see + // notes/compiler-merge/PROGRESSION-LOG.md. + let bv = "__fb" + string d + let b = AST.Var bv + let hi = AST.BinOp(AST.Shr, b, AST.UInt64Literal 32UL) + // lo = b - (hi << 32), NOT `b &&& 0xFFFFFFFFUL`: x64's `AND r/m64, imm32` + // sign-extends the immediate, so masking with 0xFFFFFFFF ANDs against all-ones and + // is a no-op -- the compiled side returned the whole 64-bit value as `lo` while the + // interpreter returned the true low half. Sub + a shift-by-32 use only small + // immediates and are exact. + let lo = AST.BinOp(AST.Sub, b, AST.BinOp(AST.Shl, hi, AST.UInt64Literal 32UL)) + Ok( + AST.Let( + bv, + call "Stdlib.Float.toBits" [ v ], + cat + (cat (call "Stdlib.UInt64.toString" [ hi ]) (AST.StringLiteral ":")) + (call "Stdlib.UInt64.toString" [ lo ]))) // `unit` regardless of the value, but keep v evaluated so effects/typing hold. | AST.TUnit -> Ok(AST.Let("__mu" + string d, v, AST.StringLiteral "unit")) | AST.TList inner -> @@ -1280,7 +1315,27 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = | WAString -> Ok a | WAInt -> Ok(AST.Call("Stdlib.Int64.toString", AST.NonEmptyList.singleton a)) | WABool -> Ok(AST.Call("Stdlib.Bool.toString", AST.NonEmptyList.singleton a)) - | WAFloat -> Ok(AST.Call("Stdlib.Float.toString", AST.NonEmptyList.singleton a)) + // "hi:lo" bit halves, same encoding and same reasons as + // marshalTypedSeen's TFloat64 (exactness, and dodging the signed + // UInt64.toString bug). This is the ARG direction, where the old + // lossy rendering meant a Float param handed to a real builtin + // through the seam arrived rounded to 12 significant digits (and, + // for magnitudes past Float.toInt's range, as garbage). + | WAFloat -> + let bits = AST.Call("Stdlib.Float.toBits", AST.NonEmptyList.singleton a) + let u64 e = AST.Call("Stdlib.UInt64.toString", AST.NonEmptyList.singleton e) + let b = AST.Var "__rpc_fb" + let hi = AST.BinOp(AST.Shr, b, AST.UInt64Literal 32UL) + // lo by subtraction, not a 0xFFFFFFFF mask -- see marshalTypedSeen. + let lo = AST.BinOp(AST.Sub, b, AST.BinOp(AST.Shl, hi, AST.UInt64Literal 32UL)) + Ok( + AST.Let( + "__rpc_fb", + bits, + AST.BinOp( + AST.StringConcat, + AST.BinOp(AST.StringConcat, u64 hi, AST.StringLiteral ":"), + u64 lo))) | WAUnit -> Ok(AST.Let("__rpc_unit", a, AST.StringLiteral "unit")) // A container/custom type: encode it exactly as the daemon's // wireToDvalTyped decodes. If it CAN'T be encoded (a recursive diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index ab4d7b66e5..ced0b86125 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -777,7 +777,17 @@ let rec private dvalToWire (d : Dval) : string = | DUInt128 n -> string n | DBool b -> if b then "true" else "false" | DUnit -> "unit" - | DFloat f -> string f + // A Float travels as its IEEE-754 bit pattern in two 32-bit halves, "hi:lo" -- the + // mirror of Bridge's TFloat64 / WAFloat encoders (see there for why halves). + // + // `string f` rendered 5.0 as "5" against the compiler's "5.0" and reported + // Stdlib.Int.toFloat as a DIFF when both engines held the same value. Dark's own + // floatToString isn't the answer either: it is G12-lossy (so distinct floats render + // ALIKE and a real diff could hide behind the rendering), and it appends ".0" to + // exponent form, emitting the malformed "1e+13.0". Bits are exact and total. + | DFloat f -> + let b = System.BitConverter.DoubleToUInt64Bits f + string (b >>> 32) + ":" + string (b &&& 0xFFFFFFFFUL) | DChar c -> c // A Blob marshals as its byte VALUES, one per line -- the same shape as a // List, which is exactly what the compiled side emits via @@ -817,7 +827,13 @@ let private wireToDval (t : TypeReference) (s : string) : Dval = | TUInt128 -> DUInt128(System.UInt128.Parse s) | TBool -> DBool(s = "true") | TUnit -> DUnit - | TFloat -> DFloat(float s) + // "hi:lo" bit halves -- the inverse of Bridge's WAFloat encoder. + | TFloat -> + match s.Split(':') with + | [| hi; lo |] -> + let b = (System.UInt64.Parse hi <<< 32) ||| System.UInt64.Parse lo + DFloat(System.BitConverter.UInt64BitsToDouble b) + | _ -> DFloat(float s) // pre-bits wire; shouldn't happen, but don't invent a value | TChar -> DChar s | TUuid -> DUuid(System.Guid.Parse s) // A list/dict arg arrives as an opaque handle id -> resolve to the real Dval. From 9a8df1b959c728804049393e86ca3b0db03026fe Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 05:49:26 -0400 Subject: [PATCH 154/172] compiler: the seam truncated every multi-line ARG MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The RPC request was `name \n arg1 \n arg2 …` with the args UNESCAPED, and the daemon recovered them with `request.Split('\n')` followed by `List.truncate (param count)`. So an arg whose encoding contained a newline arrived as several "args" and everything past its first line was dropped: AltJson.format(Json.Null) -> "Null" -> match (nullary = one line) AltJson.format(Json.Bool true) -> "Bool\ntrue" -> daemon saw "Bool" -> ERR:exn:Invalid Json AltJson.format(Json.Array […]) -> multi-line -> ERR:exn:Invalid Json So EVERY non-scalar arg through the seam was mutilated, and it only failed loudly by luck: wireToDvalTyped rejects a malformed enum. A List arg is the dangerous shape — "a\nb\nc" truncates to "a" and decodes as a perfectly valid ONE-ELEMENT LIST. Silently wrong; the Directory.list bug over again, in the arg direction. A String arg containing a newline had the same flaw. Fix: escape each arg (Stdlib.hostRpcEscape) before joining, unescape it in the daemon. Both halves already existed and were applied to container ELEMENTS — just never to the top-level frame. Unescape is a no-op for text without a backslash or newline, which is why the hand-built self-test requests still round-trip untouched. Third instance of one pattern, now written up in PROGRESSION-LOG.md: a wire format needs the same escaping discipline at EVERY nesting level, and the encoder/decoder must agree about the cases neither considered. Sampling matters as much as the check — a nullary or one-element value passes straight through this bug and looks like proof. Verified: AltJson.format over Null/Bool/String/Number/Array now 5/5 `match`, was 1/5. All five self-tests pass (bridge 42, marshal /home/dark, daemon 5, handle 1, listhnd 3). Aligned per-hash sweep over all 3900: rows=3900, 0 regressions, 0 gains — right for a runtime-protocol change, which should move values and not compile counts. --- backend/src/Builtins/Builtins.Compiler/Bridge.fs | 14 +++++++++++++- .../Builtins/Builtins.Compiler/Libs/Compiler.fs | 6 +++++- 2 files changed, 18 insertions(+), 2 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index ecd49b6fec..5a7f79cd2e 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -1349,13 +1349,25 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = match allOk marshaledR with | Error e -> err "builtin" $"{b.name}: arg {e}" | Ok marshaled -> + // Each arg is ESCAPED before being joined with "\n". The daemon splits the + // request on "\n" to recover args, so an arg that CONTAINS a newline used + // to become several args -- and dispatchBuiltin truncates to the param + // count, so the extra lines were dropped on the floor. Every multi-line + // arg was therefore silently mutilated: + // AltJson.format(Json.Bool true) -> wire "Bool\ntrue" -> the daemon saw + // just "Bool" -> "ERR:exn:Invalid Json". Only nullary cases (one line) + // worked. + // It fails loudly for enums only by luck; a List arg ("a\nb\nc") truncates + // to "a" and decodes as a VALID one-element list -- silently wrong, which + // is the Directory.list bug over again in the arg direction. A String arg + // containing a newline had the same flaw. let request = (AST.StringLiteral b.name, marshaled) ||> List.fold (fun acc arg -> AST.BinOp( AST.StringConcat, AST.BinOp(AST.StringConcat, acc, AST.StringLiteral "\n"), - arg)) + AST.Call("Stdlib.hostRpcEscape", AST.NonEmptyList.singleton arg))) let call = AST.Call("Stdlib.hostRpc", AST.NonEmptyList.singleton request) Ok(unmarshalReturn wireRet call)) | None -> err "builtin" $"{b.name}_v{b.version}" diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index ced0b86125..5afbc97a08 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -954,7 +954,11 @@ let private dispatchBuiltin uply { let parts = request.Split('\n') let name = parts[0] - let wireArgs = parts[1..] |> Array.toList + // Args arrive ESCAPED (see Bridge's request construction) so that an arg containing + // a newline survives this split instead of masquerading as extra args. Unescape is + // a no-op for anything without a backslash or newline, which is why the hand-built + // self-test requests still round-trip unchanged. + let wireArgs = parts[1..] |> Array.toList |> List.map unescWire // Handle-based list primitives: build/walk a real Dval list held in the daemon, // so compiled code can work with multi-element lists (which the native x64 // finger-tree can't) without ever constructing one. Element payloads are From 8e55b5649f97c0b29cdac20037f0c529bfb8d6e4 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 06:15:45 -0400 Subject: [PATCH 155/172] compiler: route Blob ARGS through the seam (+9) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit rtToMarshalable had no TBlob case, so any Blob-taking builtin was unroutable — which is what blocked stringFromBlobWithReplacement, the single largest category in the current histogram at 121 fns. Adds the TBlob arg case plus the daemon-side decode (wire byte values -> Blob.newEphemeral), the inverse of dvalToWire's DBlob. Routing to the REAL builtin is the sound choice here, not a native reimplementation: stringFromBlobWithReplacement is Encoding.UTF8.GetString, which replaces invalid sequences with U+FFFD per maximal subpart. A hand-written decoder would pass on valid input, and the sampler never generates invalid UTF-8 — so it would "prove" correct while being silently wrong on precisely the input the "WithReplacement" in its name is about. This depends on the arg-escaping fix landing first: a Blob's wire is byte values one per line, i.e. exactly the multi-line arg the old protocol truncated. blobToBytes is still NOT routed, deliberately: it returns List where the native Bytes.toList returns List. rtToMarshalable has no TUInt8 case, so it stays out. **+9, not +121** — the histogram counts each fn's FIRST blocker only, so those counts are an upper bound, never a prediction. All four sampled ex-stringFromBlobWithReplacement fns now report `unsupported-builtin: altJsonParse_v0` instead: genuinely unblocked, then stopped by the next thing. Written up in PROGRESSION-LOG.md, along with the fact that the old report's "≈300+ from custom-type marshalling" never materialised (altJsonFormat has since vanished from the histogram entirely). Verified: aligned per-hash sweep over all 3900, rows=3900, 0 regressions, +9 (2096 -> 2105). Of the 9: 8 proven byte-identical (base64Encode, base64UrlEncode, digest, Blob.fromString, HttpClient.basicAuth, the three shell-config writers), 0 DIFF, and Blob.concat is `noargs|TList TBlob` — the sampler can't build a List, so it's honestly unproven rather than passing. --- .../Builtins/Builtins.Compiler/Libs/Compiler.fs | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 5afbc97a08..dffdbc059a 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -142,6 +142,16 @@ let rec private rtToMarshalable (t : TypeReference) : AST.Type option = | TInt -> Some AST.TInt64 | TBool -> Some AST.TBool | TUnit -> Some AST.TUnit + // A Blob marshals as its byte values (marshalTypedSeen's TBytes / dvalToWire's + // DBlob), so it can cross the seam in either direction. Without this case, any + // Blob-taking builtin was unroutable — which is why stringFromBlobWithReplacement + // (the UTF-8 DECODE, and the single largest remaining blocker at 121 fns) never + // compiled. Routing it to the real builtin is the sound answer: its semantics are + // Encoding.UTF8.GetString, which replaces invalid sequences with U+FFFD per maximal + // subpart. A hand-written decoder would match on valid input, and the sampler never + // generates invalid UTF-8 — so it would "prove" correct and be silently wrong on + // exactly the input the "WithReplacement" in its name is about. + | TBlob -> Some AST.TBytes | TList inner -> rtToMarshalable inner |> Option.map AST.TList | TCustomType(nr, args) -> match nr.resolved with @@ -827,6 +837,13 @@ let private wireToDval (t : TypeReference) (s : string) : Dval = | TUInt128 -> DUInt128(System.UInt128.Parse s) | TBool -> DBool(s = "true") | TUnit -> DUnit + // Byte values, one per line -- the inverse of dvalToWire's DBlob case. Always + // Ephemeral: a Persistent blob is a content hash in the package store, and a value + // arriving over the wire has no such identity. + | TBlob -> + let bytes = + if s = "" then [||] else s.Split('\n') |> Array.map System.Byte.Parse + LibExecution.Blob.newEphemeral bytes // "hi:lo" bit halves -- the inverse of Bridge's WAFloat encoder. | TFloat -> match s.Split(':') with From a0eb2cdcac77f5714f56b0208cdf3f9bb986b478 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 06:43:16 -0400 Subject: [PATCH 156/172] =?UTF-8?q?compiler:=20make=20the=20return=20decod?= =?UTF-8?q?er=20TOTAL=20=E2=80=94=20hard-fail=20instead=20of=20returning?= =?UTF-8?q?=20raw=20wire?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit unmarshalTyped ended in `| _ -> src`, which hands compiled code the raw wire String typed as whatever the return type claimed. That was sound only while every isMarshalableType case had a matching decoder here — an invariant a comment cannot enforce, and one I broke myself this session: widening the gate for TBytes made that "unreachable" line reachable, and I only caught it by re-reading the comment that said it couldn't happen. So encode the invariant instead of asserting it. unmarshalTypedR returns Result; an undecodable type is a named blocker (`unsupported-builtin: : unmarshalable-return: `), reported like any other, never a guess. The gate and the decoder can no longer drift silently. This also unblocks the next step architecturally. buildEffectfulMap has to pre-gate returns on isMarshalableType because it is built from the RUNTIME and has no type env — it cannot tell whether a custom type is decodable. Now that the bridge (which does have the defs) fails precisely, that gate can be relaxed for custom-type returns without the failure mode being a silently-wrong value. That's what altJsonParse needs — it returns Result, and it's the blocker sitting behind the Blob work. No behaviour change: isMarshalableType still pre-gates, so the new error path is a safety net, not a live path. Verified exactly that — aligned per-hash sweep over all 3900, rows=3900, 0 regressions AND 0 gains, 2105 both sides. All five self-tests pass, the two that now thread the Result included (marshal /home/dark, listhnd 3). The failwith shim I first reached for is banned in this repo; the two self-test callers handle the Result properly instead, which is better anyway. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 109 ++++++++++-------- .../Builtins.Compiler/Libs/Compiler.fs | 10 +- 2 files changed, 69 insertions(+), 50 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 5a7f79cd2e..8d45ecee64 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -1128,7 +1128,13 @@ let isSerializableType (defs : Map) (t : AST.Type) : bool = | Ok() -> true | Error _ -> false -let rec unmarshalTyped (d : int) (t : AST.Type) (src : AST.Expr) : AST.Expr = +/// Decode a wire response (an AST String expr) into a native value of compiler type `t`. +/// TOTAL: an undecodable type is an Error, never a guess. It used to end in `| _ -> src`, +/// which hands compiled code the raw wire String typed as whatever `t` claimed -- sound +/// only while every isMarshalableType case had a decoder here, an invariant a comment +/// cannot enforce (widening the gate for TBytes made that "unreachable" line reachable). +/// Now the two can't drift silently: a missing decoder is a hard-fail with a named type. +let rec unmarshalTypedR (d : int) (t : AST.Type) (src : AST.Expr) : Result = let rv = "__rpc_" + string d let r = AST.Var rv let len e = AST.Call("Stdlib.String.length", AST.NonEmptyList.singleton e) @@ -1139,64 +1145,66 @@ let rec unmarshalTyped (d : int) (t : AST.Type) (src : AST.Expr) : AST.Expr = let optT = "Stdlib.Option.Option" let resT = "Stdlib.Result.Result" match t with - | AST.TString -> src - | AST.TInt64 -> parseInt src - | AST.TBool -> AST.BinOp(AST.Eq, src, AST.StringLiteral "true") - | AST.TUnit -> AST.Let(rv, src, AST.UnitLiteral) + | AST.TString -> Ok src + | AST.TInt64 -> Ok(parseInt src) + | AST.TBool -> Ok(AST.BinOp(AST.Eq, src, AST.StringLiteral "true")) + | AST.TUnit -> Ok(AST.Let(rv, src, AST.UnitLiteral)) | AST.TSum("Stdlib.Option.Option", [ inner ]) -> - AST.Let( - rv, - src, - AST.If( - starts r "Some\n", - AST.Constructor(optT, "Some", Some(unmarshalTyped (d + 1) inner (unesc (slice r (AST.Int64Literal 5L) (len r))))), - AST.Constructor(optT, "None", None))) + unmarshalTypedR (d + 1) inner (unesc (slice r (AST.Int64Literal 5L) (len r))) + |> Result.map (fun body -> + AST.Let( + rv, + src, + AST.If( + starts r "Some\n", + AST.Constructor(optT, "Some", Some body), + AST.Constructor(optT, "None", None)))) | AST.TSum("Stdlib.Result.Result", [ okT; errT ]) -> - AST.Let( - rv, - src, - AST.If( - starts r "Error\n", - AST.Constructor(resT, "Error", Some(unmarshalTyped (d + 1) errT (unesc (slice r (AST.Int64Literal 6L) (len r))))), - AST.Constructor(resT, "Ok", Some(unmarshalTyped (d + 1) okT (unesc (slice r (AST.Int64Literal 3L) (len r))))))) + match + unmarshalTypedR (d + 1) errT (unesc (slice r (AST.Int64Literal 6L) (len r))), + unmarshalTypedR (d + 1) okT (unesc (slice r (AST.Int64Literal 3L) (len r))) + with + | Ok errBody, Ok okBody -> + Ok( + AST.Let( + rv, + src, + AST.If( + starts r "Error\n", + AST.Constructor(resT, "Error", Some errBody), + AST.Constructor(resT, "Ok", Some okBody)))) + | Error e, _ | _, Error e -> Error e | AST.TList inner -> let ev = "__rpce_" + string d - let lam = - AST.Lambda( - AST.NonEmptyList.fromList [ (ev, AST.TString) ], - unmarshalTyped (d + 1) inner (unesc (AST.Var ev))) - let split = AST.Call("Stdlib.String.split", AST.NonEmptyList.fromList [ r; AST.StringLiteral "\n" ]) - AST.Let( - rv, - src, - AST.If( - AST.BinOp(AST.Eq, r, AST.StringLiteral ""), - AST.ListLiteral [], - AST.TypeApp("Stdlib.List.map", [ AST.TString; inner ], AST.NonEmptyList.fromList [ split; lam ]))) + unmarshalTypedR (d + 1) inner (unesc (AST.Var ev)) + |> Result.map (fun body -> + let lam = AST.Lambda(AST.NonEmptyList.fromList [ (ev, AST.TString) ], body) + let split = AST.Call("Stdlib.String.split", AST.NonEmptyList.fromList [ r; AST.StringLiteral "\n" ]) + AST.Let( + rv, + src, + AST.If( + AST.BinOp(AST.Eq, r, AST.StringLiteral ""), + AST.ListLiteral [], + AST.TypeApp("Stdlib.List.map", [ AST.TString; inner ], AST.NonEmptyList.fromList [ split; lam ])))) // The exact inverse of marshalTypedSeen's TBytes case: the wire is the byte values // one per line, so reuse the TList decoder (which already maps "" -> []) and rebuild // with the native Bytes.fromList; the empty wire lands on Bytes.create(0). | AST.TBytes -> - AST.Call( - "Stdlib.Bytes.fromList", - AST.NonEmptyList.fromList [ unmarshalTyped d (AST.TList AST.TInt64) src ]) - // Anything else is a BUG, not a value: `src` is the raw wire String, so returning it - // here hands compiled code a String bit-pattern typed as something else. This stays - // sound only while every isMarshalableType case above has a decoder -- adding a type - // to isMarshalableType without adding it here silently reintroduces that. (TBytes was - // exactly that: widening the gate made this "unreachable" line reachable.) - | _ -> src + unmarshalTypedR d (AST.TList AST.TInt64) src + |> Result.map (fun l -> AST.Call("Stdlib.Bytes.fromList", AST.NonEmptyList.singleton l)) + | other -> Error $"unmarshalable-return: {other}" /// Unmarshal a host-RPC wire response into a native value per its return wire /// type. Scalars are decoded inline; every container routes through the recursive -/// unmarshalTyped over the bridged return type. -let private unmarshalReturn (ret : WireRet) (call : AST.Expr) : AST.Expr = +/// unmarshalTypedR over the bridged return type, which hard-fails rather than guess. +let private unmarshalReturn (ret : WireRet) (call : AST.Expr) : Result = match ret with - | WRString -> call - | WRInt -> AST.Call("Stdlib.hostRpcParseInt", AST.NonEmptyList.singleton call) - | WRBool -> AST.BinOp(AST.Eq, call, AST.StringLiteral "true") - | WRUnit -> AST.Let("__rpc_ignore", call, AST.UnitLiteral) - | WRTyped t -> unmarshalTyped 0 t call + | WRString -> Ok call + | WRInt -> Ok(AST.Call("Stdlib.hostRpcParseInt", AST.NonEmptyList.singleton call)) + | WRBool -> Ok(AST.BinOp(AST.Eq, call, AST.StringLiteral "true")) + | WRUnit -> Ok(AST.Let("__rpc_ignore", call, AST.UnitLiteral)) + | WRTyped t -> unmarshalTypedR 0 t call let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = let recurse = bridgeExpr ctx @@ -1369,7 +1377,12 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = AST.BinOp(AST.StringConcat, acc, AST.StringLiteral "\n"), AST.Call("Stdlib.hostRpcEscape", AST.NonEmptyList.singleton arg))) let call = AST.Call("Stdlib.hostRpc", AST.NonEmptyList.singleton request) - Ok(unmarshalReturn wireRet call)) + // A return type the decoder can't handle is a BLOCKER, reported like any + // other, not a silently-wrong value. This is what lets buildEffectfulMap + // stop pre-gating returns on isMarshalableType: that map is built from the + // runtime and has no type env, whereas the failure is precise here. + unmarshalReturn wireRet call + |> Result.mapError (fun e -> $"unsupported-builtin: {b.name}: {e}")) | None -> err "builtin" $"{b.name}_v{b.version}" | PT.FQFnName.Package(PT.Hash h) -> let bridgedArgs = args |> NEList.toList |> List.map recurse |> allOk diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index dffdbc059a..1732ed3729 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -1733,7 +1733,11 @@ let fns () : List = AST.Call( "Stdlib.hostRpc", AST.NonEmptyList.singleton (AST.StringLiteral "environmentGet\nHOME")) - let decoded = Bridge.unmarshalTyped 0 optStrTy rpcCall + match Bridge.unmarshalTypedR 0 optStrTy rpcCall with + | Error e -> + daemon.Wait() + return DString $"decode-error: {e}" + | Ok decoded -> let program : AST.Program = AST.Program [ AST.Expression( @@ -1986,7 +1990,9 @@ let fns () : List = | _, _, _, [ DUnit ] -> uply { // Decode a wire list "alpha\\nbeta\\ngamma" via unmarshalTyped(List), no daemon -> length 3 - let decoded = Bridge.unmarshalTyped 0 (AST.TList AST.TString) (AST.StringLiteral "alpha\nbeta\ngamma") + match Bridge.unmarshalTypedR 0 (AST.TList AST.TString) (AST.StringLiteral "alpha\nbeta\ngamma") with + | Error e -> return DString ("decode: " + e) + | Ok decoded -> let len = AST.TypeApp("Stdlib.List.length", [ AST.TString ], AST.NonEmptyList.singleton decoded) let program = AST.Program [ AST.Expression(AST.Call("Stdlib.Int64.toString", AST.NonEmptyList.singleton len)) ] match compileAst program with From 0e74a89ebbeeb6fe54eafc67745d7f116b0141c3 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 07:24:27 -0400 Subject: [PATCH 157/172] compiler: decode custom types in the RETURN direction (+129) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The biggest gain of the branch, and it's the payoff for making the decoder total first. Emits one `__unmarshal.(s: String) : T` per non-generic custom type — the exact twin of `__marshal.` — so a recursive type decodes by calling itself instead of generating AST forever (the lesson from the inlined Json serializer that core-dumped the CLI). Records split on "\n" and decode positionally in NAME order; enums split off the first line as the case name and dispatch; tuples mirror the marshal side. Reachable unmarshallers only, transitively closed, for the same reason as the marshal side: one emitted per type broke 11 of 60 sampled fns. buildEffectfulMap no longer pre-gates returns on isMarshalableType. That gate existed only because the decoder used to end in `| _ -> src` — and the map is built from the RUNTIME, with no type env, so it cannot itself tell whether a custom type decodes. With a total decoder the bridge reports a precise blocker instead, so optimism here is safe: the worst case is a named `unsupported-builtin`, not a wrong value. Two bugs found while building it, both from swallowed errors: - No TTuple case, so anything containing a tuple failed — including Json's `Object of List<(String * Json)>`. - unmarshalFnDefsFor drops a failing decoder (`| Error _ -> None`) while the CALL to it was emitted anyway, so the program died with a dangling "no variable named __unmarshal.T." — an error naming the symbol and hiding the cause. It cost two debug cycles. Now the call site verifies the def will generate and propagates the real reason, so dangling references are structurally impossible. altJsonParse now reports the truth: `altJsonParse: T.130be4b5(Json): unmarshalable-return: TFloat64` — Json holds a Float, and Float.toBits has no inverse intrinsic (task #23, the next blocker). Verified: aligned per-hash sweep over all 3900, rows=3900, **+129** (2105 -> ~2234) and **0 regressions**. The 12 apparent True->False are all STILL-FAILED, i.e. UNMEASURED: one 25-chunk blew even the 2400s budget, and each of the 12 compiles fine when run individually (String.toBlob among them, which is separately proven to match). Cost noted honestly: unmeasurable outliers rose 75 -> 100, because the decoder makes programs bigger and slower to compile. Differential on a 20-fn sample of the gains: 13 match, 0 miscompiles, 2 DIFF that are harness artifacts, not compiler bugs — Posix.symlink (c=Ok vs i=EEXIST) and Posix.unlink (c=Ok vs i=ENOENT). The compiled run mutates the filesystem and the interpreter then sees what it left behind; each error is exactly what a correct SECOND run returns. The nondet double-run can't catch it because it happens after the compiled run, so both interpreter runs agree. Filed as task #24. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 258 +++++++++++++++++- .../Builtins.Compiler/Libs/Compiler.fs | 26 +- 2 files changed, 269 insertions(+), 15 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 8d45ecee64..d369f80ca1 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -769,6 +769,12 @@ let defSubstB (tps : string list) (args : AST.Type list) : Map /// Dotted, like every other name we hand the compiler (it splits mangled names on '_'). let marshalFnName (typeName : string) : string = "__marshal." + typeName +/// The decode-side twin of marshalFnName: one `__unmarshal.(s: String) : T` per +/// non-generic custom type, so a RECURSIVE type decodes by calling itself rather than +/// generating AST forever (the same reason the marshal side needs a fn, learned when an +/// inlined Json serializer core-dumped the CLI). +let unmarshalFnName (typeName : string) = "__unmarshal." + typeName + let rec marshalTypedSeen (inFnBody : bool) (seen : Set) @@ -1134,7 +1140,15 @@ let isSerializableType (defs : Map) (t : AST.Type) : bool = /// only while every isMarshalableType case had a decoder here, an invariant a comment /// cannot enforce (widening the gate for TBytes made that "unreachable" line reachable). /// Now the two can't drift silently: a missing decoder is a hard-fail with a named type. -let rec unmarshalTypedR (d : int) (t : AST.Type) (src : AST.Expr) : Result = +let rec unmarshalTypedSeen + (inFnBody : bool) + (seen : Set) + (defs : Map) + (d : int) + (t : AST.Type) + (src : AST.Expr) + : Result = + let unmarshalTypedR d t src = unmarshalTypedSeen false seen defs d t src let rv = "__rpc_" + string d let r = AST.Var rv let len e = AST.Call("Stdlib.String.length", AST.NonEmptyList.singleton e) @@ -1144,6 +1158,21 @@ let rec unmarshalTypedR (d : int) (t : AST.Type) (src : AST.Expr) : Result Ok src | AST.TInt64 -> Ok(parseInt src) @@ -1187,24 +1216,245 @@ let rec unmarshalTypedR (d : int) (t : AST.Type) (src : AST.Expr) : Result". + // Json's `Object of List<(String * Json)>` is exactly that shape. + | AST.TTuple elemTs -> + let tv = "__ut" + string d + elemTs + |> List.mapi (fun i et -> unmarshalTypedR (d + 1) et (unesc (nth (AST.Var tv) i))) + |> allOk + |> Result.map (fun parts -> AST.Let(tv, split src, AST.TupleLiteral parts)) // The exact inverse of marshalTypedSeen's TBytes case: the wire is the byte values // one per line, so reuse the TList decoder (which already maps "" -> []) and rebuild // with the native Bytes.fromList; the empty wire lands on Bytes.create(0). | AST.TBytes -> unmarshalTypedR d (AST.TList AST.TInt64) src |> Result.map (fun l -> AST.Call("Stdlib.Bytes.fromList", AST.NonEmptyList.singleton l)) + // A non-generic custom type decodes via its emitted fn -- one definition, called + // wherever needed, so recursion terminates. `inFnBody` is the single place we expand + // inline: while generating that fn's own body. + | (AST.TRecord(name, []) | AST.TSum(name, [])) when + not inFnBody && (match Map.tryFind name defs with Some _ -> true | None -> false) -> + // Only emit the CALL if the DEF will actually generate. unmarshalFnDefsFor drops a + // failing decoder (`| Error _ -> None`) while this call site emitted the call anyway, + // so the program died with a dangling "no variable named __unmarshal.T." — an + // error that names the symbol and hides the cause. It cost two debug cycles to learn + // it meant "Json contains a Float and floats don't decode". Verify here instead, so + // the real reason propagates as a normal blocker. + // + // `seen` terminates the recursion: while generating T's own body, a nested T is + // already being generated, so take the call without re-verifying. + if Set.contains name seen then + Ok(AST.Call(unmarshalFnName name, AST.NonEmptyList.singleton src)) + else + let selfT = + match Map.tryFind name defs with + | Some(AST.SumTypeDef _) -> AST.TSum(name, []) + | _ -> AST.TRecord(name, []) + // `seen`, NOT `Set.add name seen` — mirror how unmarshalFnDefsFor generates the + // body (with an empty seen). Adding the name first makes the record/sum case's own + // recursion guard fire immediately and report every type as "recursive". The body's + // `inner` adds the name for its CHILDREN, so a nested self-reference still lands on + // the call case above and terminates. + match unmarshalTypedSeen true seen defs 0 selfT (AST.Var "s") with + | Ok _ -> Ok(AST.Call(unmarshalFnName name, AST.NonEmptyList.singleton src)) + | Error e -> Error $"{name}: {e}" + // A record: fields were escaped individually and joined by "\n" in NAME order, so each + // field occupies exactly one line. Split, unescape, decode positionally, rebuild. + | AST.TRecord(name, targs) | AST.TSum(name, targs) when + (match Map.tryFind name defs with + | Some(AST.RecordDef _) -> true + | _ -> false) -> + if Set.contains name seen then Error $"unmarshal: recursive {name}" else + match Map.tryFind name defs with + | Some(AST.RecordDef(_, tps, fields)) -> + let sub = defSubstB tps targs + let pv = "__up" + string d + let inner d t v = unmarshalTypedSeen false (Set.add name seen) defs d t v + fields + |> List.sortBy fst + |> List.mapi (fun i (fname, ft) -> + inner (d + 1) (substTVarsB sub ft) (unesc (nth (AST.Var pv) i)) + |> Result.map (fun body -> (fname, body))) + |> allOk + |> Result.map (fun decodedFields -> + AST.Let(pv, split src, AST.RecordLiteral(name, decodedFields))) + | _ -> Error $"unmarshal: no record def {name}" + // A user enum: the wire is `Case` or `Case\n`. Split off the first + // line as the case name, then dispatch. The final `else` is the last variant: the wire + // is well-formed by construction (dvalToWire wrote it), and an if-chain has to produce + // a value of the type on every path. + | AST.TSum(name, targs) | AST.TRecord(name, targs) -> + if Set.contains name seen then Error $"unmarshal: recursive {name}" else + match Map.tryFind name defs with + | Some(AST.SumTypeDef(_, tps, variants)) -> + let sub = defSubstB tps targs + let inner d t v = unmarshalTypedSeen false (Set.add name seen) defs d t v + let sv = "__us" + string d + let iv = "__ui" + string d + let cv = "__uc" + string d + let rv2 = "__ur" + string d + let sVar = AST.Var sv + let iVar = AST.Var iv + let restVar = AST.Var rv2 + let decodeVariant (variant : AST.Variant) : Result = + match variant.Payload with + | None -> Ok(AST.Constructor(name, variant.Name, None)) + | Some(AST.TTuple elemTs0) -> + // multi-field: each field escaped separately, so split the payload too + let elemTs = elemTs0 |> List.map (substTVarsB sub) + let rpv = "__urp" + string d + elemTs + |> List.mapi (fun i et -> inner (d + 1) et (unesc (nth (AST.Var rpv) i))) + |> allOk + |> Result.map (fun parts -> + AST.Let(rpv, split restVar, AST.Constructor(name, variant.Name, Some(AST.TupleLiteral parts)))) + | Some pt0 -> + inner (d + 1) (substTVarsB sub pt0) (unesc restVar) + |> Result.map (fun body -> AST.Constructor(name, variant.Name, Some body)) + variants + |> List.map (fun v -> decodeVariant v |> Result.map (fun e -> (v.Name, e))) + |> allOk + |> Result.bind (fun decoded -> + match List.rev decoded with + | [] -> Error $"unmarshal: no variants for {name}" + | (_, lastBody) :: revRest -> + let chain = + revRest + |> List.fold + (fun acc (vname, body) -> + AST.If(AST.BinOp(AST.Eq, AST.Var cv, AST.StringLiteral vname), body, acc)) + lastBody + Ok( + AST.Let( + sv, + src, + AST.Let( + iv, + AST.TypeApp( + "Stdlib.Option.withDefault", + [ AST.TInt64 ], + AST.NonEmptyList.fromList + [ AST.Call("Stdlib.String.indexOf", AST.NonEmptyList.fromList [ sVar; AST.StringLiteral "\n" ]) + AST.Int64Literal -1L ]), + AST.Let( + cv, + AST.If( + AST.BinOp(AST.Lt, iVar, AST.Int64Literal 0L), + sVar, + AST.Call("Stdlib.String.slice", AST.NonEmptyList.fromList [ sVar; AST.Int64Literal 0L; iVar ])), + AST.Let( + rv2, + AST.If( + AST.BinOp(AST.Lt, iVar, AST.Int64Literal 0L), + AST.StringLiteral "", + AST.Call( + "Stdlib.String.slice", + AST.NonEmptyList.fromList + [ sVar + AST.BinOp(AST.Add, iVar, AST.Int64Literal 1L) + AST.Call("Stdlib.String.length", AST.NonEmptyList.singleton sVar) ])), + chain)))))) + | _ -> Error $"unmarshal: no sum def {name}" | other -> Error $"unmarshalable-return: {other}" +let unmarshalTypedR (d : int) (t : AST.Type) (src : AST.Expr) : Result = + unmarshalTypedSeen false Set.empty Map.empty d t src + +/// Same shape as unmarshalTypedR but with the type env, so custom types decode. +let unmarshalTypedD (defs : Map) (d : int) (t : AST.Type) (src : AST.Expr) = + unmarshalTypedSeen false Set.empty defs d t src + +/// Which unmarshallers does this expression call? Mirror of marshalCallsInExpr, and for +/// the same reason: emitting one per type puts a `__unmarshal.T` into every program, and +/// a single one that fails to typecheck breaks programs that decode nothing (that cost +/// 11 of 60 sampled fns when the marshal side did it). Emit only what's reachable. +let rec unmarshalCallsInExpr (e : AST.Expr) : Set = + let r = unmarshalCallsInExpr + let many xs = xs |> List.map r |> Set.unionMany + match e with + | AST.Call(n, args) -> + let here = + if n.StartsWith "__unmarshal." then Set.singleton (n.Substring 12) else Set.empty + Set.union here (many (AST.NonEmptyList.toList args)) + | AST.TypeApp(_, _, args) -> many (AST.NonEmptyList.toList args) + | AST.Apply(f, args) -> Set.union (r f) (many (AST.NonEmptyList.toList args)) + | AST.Let(_, v, b) -> Set.union (r v) (r b) + | AST.If(c, t, e2) -> Set.unionMany [ r c; r t; r e2 ] + | AST.BinOp(_, a, b) -> Set.union (r a) (r b) + | AST.UnaryOp(_, a) -> r a + | AST.Lambda(_, b) -> r b + | AST.Match(v, cases) -> Set.union (r v) (cases |> List.map (fun c -> r c.Body) |> Set.unionMany) + | AST.ListLiteral xs -> many xs + | AST.TupleLiteral xs -> many xs + | AST.TupleAccess(v, _) -> r v + | AST.RecordLiteral(_, fields) -> many (fields |> List.map snd) + | AST.RecordAccess(v, _) -> r v + | AST.RecordUpdate(v, ups) -> Set.union (r v) (many (ups |> List.map snd)) + | AST.Constructor(_, _, Some p) -> r p + | AST.InterpolatedString _ -> Set.empty // interpolations can't contain an unmarshaller call + | _ -> Set.empty + +/// One `__unmarshal.(s: String) : T` per NON-GENERIC custom type in `needed`. +/// Generic types are skipped for the same reason the marshal side skips them: they'd +/// need a decoding fn per type param (higher-order), which doesn't exist yet. +let unmarshalFnDefsFor (defs : Map) (needed : Set) : List = + defs + |> Map.toList + |> List.filter (fun (name, _) -> Set.contains name needed) + |> List.choose (fun (name, def) -> + let tps = + match def with + | AST.RecordDef(_, tps, _) -> Some tps + | AST.SumTypeDef(_, tps, _) -> Some tps + | AST.TypeAlias _ -> None + match tps with + | Some [] -> + let selfT = + match def with + | AST.SumTypeDef _ -> AST.TSum(name, []) + | _ -> AST.TRecord(name, []) + match unmarshalTypedSeen true Set.empty defs 0 selfT (AST.Var "s") with + | Ok body -> + Some( + { Name = unmarshalFnName name + TypeParams = [] + Params = AST.NonEmptyList.singleton ("s", AST.TString) + ReturnType = selfT + Body = body } : AST.FunctionDef + ) + | Error _ -> None + | _ -> None) + +/// Transitively close the set: an unmarshaller's body may call other unmarshallers. +let unmarshalFnDefs (defs : Map) (seed : Set) : List = + let mutable needed = seed + let mutable changed = true + while changed do + let fns = unmarshalFnDefsFor defs needed + let more = + fns |> List.map (fun f -> unmarshalCallsInExpr f.Body) |> Set.unionMany |> Set.union needed + changed <- more <> needed + needed <- more + unmarshalFnDefsFor defs needed + /// Unmarshal a host-RPC wire response into a native value per its return wire /// type. Scalars are decoded inline; every container routes through the recursive /// unmarshalTypedR over the bridged return type, which hard-fails rather than guess. -let private unmarshalReturn (ret : WireRet) (call : AST.Expr) : Result = +let private unmarshalReturn + (defs : Map) + (ret : WireRet) + (call : AST.Expr) + : Result = match ret with | WRString -> Ok call | WRInt -> Ok(AST.Call("Stdlib.hostRpcParseInt", AST.NonEmptyList.singleton call)) | WRBool -> Ok(AST.BinOp(AST.Eq, call, AST.StringLiteral "true")) | WRUnit -> Ok(AST.Let("__rpc_ignore", call, AST.UnitLiteral)) - | WRTyped t -> unmarshalTypedR 0 t call + | WRTyped t -> unmarshalTypedD defs 0 t call let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = let recurse = bridgeExpr ctx @@ -1381,7 +1631,7 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = // other, not a silently-wrong value. This is what lets buildEffectfulMap // stop pre-gating returns on isMarshalableType: that map is built from the // runtime and has no type env, whereas the failure is precise here. - unmarshalReturn wireRet call + unmarshalReturn ctx.TypeDefs wireRet call |> Result.mapError (fun e -> $"unsupported-builtin: {b.name}: {e}")) | None -> err "builtin" $"{b.name}_v{b.version}" | PT.FQFnName.Package(PT.Hash h) -> diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 1732ed3729..07d360ccb8 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -227,16 +227,16 @@ let private buildEffectfulMap // General container returns (Option/Result/List of marshalable types); the // recursive unmarshaller decodes them. // - // GATED on isMarshalableType, which is what unmarshalTyped can actually - // DECODE — a narrower set than rtToMarshalable can now express. Since - // rtToMarshalable started naming custom types (so they can be marshalled as - // ARGS), an ungated return would hand unmarshalTyped a record/enum, hit its - // `| _ -> src` fallthrough, and silently yield the raw wire string AS the - // value. The arg direction and the return direction have different - // capabilities; don't let one imply the other. - match rtToMarshalable other with - | Some bt when Bridge.isMarshalableType bt -> Some(Bridge.WRTyped bt) - | _ -> None + // NO LONGER gated on isMarshalableType. That gate existed because + // unmarshalTyped ended in `| _ -> src`, so an undecodable return silently + // yielded the raw wire string AS the value — and this map is built from the + // RUNTIME, with no type env, so it cannot itself tell whether a custom type + // decodes. Now that the decoder is TOTAL, the bridge (which does have the defs) + // reports a precise blocker instead, so being optimistic here is safe: the worst + // case is `unsupported-builtin: : unmarshalable-return: `, not a + // wrong value. That's what lets custom-type returns (altJsonParse -> + // Result) route at all. + rtToMarshalable other |> Option.map Bridge.WRTyped match wireRet with | Some ret when not (List.exists Option.isNone argWires) -> Some(name.name, (argWires |> List.map Option.get, ret)) @@ -491,7 +491,11 @@ let private buildPieces // those transitively call). Emitting one per type polluted every program. let seed = fds |> List.map (fun f -> Bridge.marshalCallsInExpr f.Body) |> Set.unionMany let marshallers = Bridge.marshalFnDefs emittedDefs seed - return Ok(tds, marshallers @ valueDefs @ fds, Bridge.nameFor rootHash) + // Same story in the decode direction: a builtin returning a custom type calls + // __unmarshal.T, so emit those too -- reachable ones only, transitively closed. + let useed = fds |> List.map (fun f -> Bridge.unmarshalCallsInExpr f.Body) |> Set.unionMany + let unmarshallers = Bridge.unmarshalFnDefs emittedDefs useed + return Ok(tds, marshallers @ unmarshallers @ valueDefs @ fds, Bridge.nameFor rootHash) } /// Substitute type variables (used to instantiate a generic root fn's type From 89f10eb4b965954e5c160d629826f411bb36837e Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 08:01:44 -0400 Subject: [PATCH 158/172] =?UTF-8?q?compiler:=20Float.fromBits=20+=20lazy-s?= =?UTF-8?q?afe=20decoders=20=E2=80=94=20recursive=20JSON=20now=20round-tri?= =?UTF-8?q?ps=20(+3)?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit AltJson.parse compiles and matches the interpreter on all 9 probes, including 3.14 and [1.5,{"b":[true,null]}] — a recursive JSON value decoded through the seam, byte-identical. The compile count only moves +3; the capability is the point. Three things were in the way, each found by unmasking the error rather than guessing: 1. **Float had no inverse.** Stdlib.Float.toBits existed with nothing going the other way, so a Float could not be RECONSTRUCTED in compiled code — which blocked decoding any type containing one (Json's `Number of Float`). Turned out to need NO codegen at all: `__raw_get` already lowers to RawGet + GpToFp (a movq into an xmm), so fromBits is store-the-bits / load-at-Float-type, five lines of stdlib. Takes Int64 deliberately — it's a bit PATTERN, the sign label is meaningless, and Int64 keeps clear of the unsigned-comparison codegen bug (task #22). Task #23 assumed a new intrinsic; it didn't need one. 2. **An if-chain can't decode an enum.** The ANF pass refused with "If expression requires lazy branch lowering", and it was right: an If in ATOM position lowers to IfValue only when BOTH branches are eagerly safe, and these branches call __unmarshal — eagerly decoding every variant would be wrong, and would never terminate on a recursive type. Uses Match now (lazy arms), which is why the marshal side uses Match too. 3. **Decoded sub-expressions sat in atom positions.** A constructor payload, a record field and a tuple slot are all atom positions, and a decoder body can be an If (the TList case is `if wire == "" then [] else map …`). That If was fine while it was a whole fn's return and only became illegal once nested — so `Array of List` hit it. Each decoded part is now bound with a Let first, leaving vars in the atom slots. The enum's own case/rest split dropped its Ifs another way: default indexOf to LENGTH rather than -1 and the branches vanish, since slice clamps. Verified: aligned per-hash sweep over all 3900, rows=3900, 0 regressions, +3 (2222 -> 2225). Differential: AltJson.parse 9/9 match (null/true/42/"hi"/[1,2]/{"a":1}/ not json/3.14/nested), covering the Ok and Error branches, the Float path, and recursion. Cost, stated plainly: compile time keeps climbing as the decoder grows — dead 200-fn chunks went 600 -> 800 -> 1000 across this work, and unmeasurable outliers sit at 100 (was 75 before the decoder). The repair pass still resolves them, but the trend is real and task #20 should look at AST size, not GC. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 122 +++++++++++++----- backend/src/LibCompiler/stdlib/Float.dark | 16 +++ 2 files changed, 105 insertions(+), 33 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index d369f80ca1..14c0c42a20 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -1216,6 +1216,23 @@ let rec unmarshalTypedSeen AST.BinOp(AST.Eq, r, AST.StringLiteral ""), AST.ListLiteral [], AST.TypeApp("Stdlib.List.map", [ AST.TString; inner ], AST.NonEmptyList.fromList [ split; lam ])))) + // The inverse of marshalTypedSeen's TFloat64 case: the wire is "hi:lo", the two 32-bit + // halves of the IEEE-754 bit pattern. Recombine (hi << 32 + lo) and reinterpret. + // Addition, not BitOr, and Int64 throughout: the halves are disjoint so `+` and `|` + // agree, and this stays clear of both codegen bugs (unsigned compare, and the + // sign-extending AND imm32). + | AST.TFloat64 -> + let fv = "__uf" + string d + let hiE = parseInt (nth (AST.Var fv) 0) + let loE = parseInt (nth (AST.Var fv) 1) + Ok( + AST.Let( + fv, + AST.Call("Stdlib.String.split", AST.NonEmptyList.fromList [ src; AST.StringLiteral ":" ]), + AST.Call( + "Stdlib.Float.fromBits", + AST.NonEmptyList.singleton ( + AST.BinOp(AST.Add, AST.BinOp(AST.Shl, hiE, AST.Int64Literal 32L), loE))))) // The inverse of marshalTypedSeen's TTuple case: each slot escaped, joined by "\n". // Without this, ANY type containing a tuple failed to decode -- and since a failed // decoder is silently dropped by unmarshalFnDefsFor while the CALL to it is still @@ -1224,9 +1241,13 @@ let rec unmarshalTypedSeen | AST.TTuple elemTs -> let tv = "__ut" + string d elemTs - |> List.mapi (fun i et -> unmarshalTypedR (d + 1) et (unesc (nth (AST.Var tv) i))) + |> List.mapi (fun i et -> + unmarshalTypedR (d + 1) et (unesc (nth (AST.Var tv) i)) |> Result.map (fun b -> ($"__utp{d}_{i}", b))) |> allOk - |> Result.map (fun parts -> AST.Let(tv, split src, AST.TupleLiteral parts)) + |> Result.map (fun parts -> + let tup = AST.TupleLiteral(parts |> List.map (fst >> AST.Var)) + let bound = parts |> List.rev |> List.fold (fun acc (n, b) -> AST.Let(n, b, acc)) tup + AST.Let(tv, split src, bound)) // The exact inverse of marshalTypedSeen's TBytes case: the wire is the byte values // one per line, so reuse the TList decoder (which already maps "" -> []) and rebuild // with the native Bytes.fromList; the empty wire lands on Bytes.create(0). @@ -1278,10 +1299,18 @@ let rec unmarshalTypedSeen |> List.sortBy fst |> List.mapi (fun i (fname, ft) -> inner (d + 1) (substTVarsB sub ft) (unesc (nth (AST.Var pv) i)) - |> Result.map (fun body -> (fname, body))) + |> Result.map (fun body -> (fname, $"__uf{d}_{i}", body))) |> allOk |> Result.map (fun decodedFields -> - AST.Let(pv, split src, AST.RecordLiteral(name, decodedFields))) + // bind every field, then build the record from vars -- record fields are atom + // positions too, and a field decoder can be an If (see the variant case). + let rec2 = + AST.RecordLiteral(name, decodedFields |> List.map (fun (fn2, vn, _) -> (fn2, AST.Var vn))) + let bound = + decodedFields + |> List.rev + |> List.fold (fun acc (_, vn, b) -> AST.Let(vn, b, acc)) rec2 + AST.Let(pv, split src, bound)) | _ -> Error $"unmarshal: no record def {name}" // A user enum: the wire is `Case` or `Case\n`. Split off the first // line as the case name, then dispatch. The final `else` is the last variant: the wire @@ -1296,6 +1325,7 @@ let rec unmarshalTypedSeen let sv = "__us" + string d let iv = "__ui" + string d let cv = "__uc" + string d + let lv = "__ul" + string d let rv2 = "__ur" + string d let sVar = AST.Var sv let iVar = AST.Var iv @@ -1308,13 +1338,27 @@ let rec unmarshalTypedSeen let elemTs = elemTs0 |> List.map (substTVarsB sub) let rpv = "__urp" + string d elemTs - |> List.mapi (fun i et -> inner (d + 1) et (unesc (nth (AST.Var rpv) i))) + |> List.mapi (fun i et -> + inner (d + 1) et (unesc (nth (AST.Var rpv) i)) |> Result.map (fun b -> ($"__uvt{d}_{i}", b))) |> allOk |> Result.map (fun parts -> - AST.Let(rpv, split restVar, AST.Constructor(name, variant.Name, Some(AST.TupleLiteral parts)))) + // bind each slot, then build the tuple from vars (atom positions) + let tup = AST.TupleLiteral(parts |> List.map (fst >> AST.Var)) + let bound = + parts + |> List.rev + |> List.fold (fun acc (n, b) -> AST.Let(n, b, acc)) (AST.Constructor(name, variant.Name, Some tup)) + AST.Let(rpv, split restVar, bound)) | Some pt0 -> + // Hoist the decoded payload into a Let so the Constructor ARG is a plain var. + // A decoder body can be an If (the TList case is `if wire == "" then [] else + // map …`), and an If in ATOM position — which a constructor arg is — needs both + // branches eagerly safe. Let-value position is lowered lazily, so binding first + // sidesteps it. Same reason the record/tuple cases below bind every part. + let pv = "__uv" + string d inner (d + 1) (substTVarsB sub pt0) (unesc restVar) - |> Result.map (fun body -> AST.Constructor(name, variant.Name, Some body)) + |> Result.map (fun body -> + AST.Let(pv, body, AST.Constructor(name, variant.Name, Some(AST.Var pv)))) variants |> List.map (fun v -> decodeVariant v |> Result.map (fun e -> (v.Name, e))) |> allOk @@ -1322,42 +1366,54 @@ let rec unmarshalTypedSeen match List.rev decoded with | [] -> Error $"unmarshal: no variants for {name}" | (_, lastBody) :: revRest -> - let chain = - revRest - |> List.fold - (fun acc (vname, body) -> - AST.If(AST.BinOp(AST.Eq, AST.Var cv, AST.StringLiteral vname), body, acc)) - lastBody + // MATCH on the case name, not an if-chain. An `If` in atom position is lowered + // to IfValue only when BOTH branches are safe to evaluate eagerly, and these + // branches call __unmarshal — so the ANF pass rightly refused ("If expression + // requires lazy branch lowering"). Eagerly decoding every variant would be + // wrong anyway, and would never terminate for a recursive type. Match arms are + // lazy, which is also why the marshal side uses Match. The wildcard arm is the + // last variant: the wire is well-formed by construction (dvalToWire wrote it), + // and every arm must produce a value of the type. + let arms = + (revRest + |> List.rev + |> List.map (fun (vname, body) -> + { AST.Patterns = AST.NonEmptyList.singleton (AST.PString vname) + AST.Guard = None + AST.Body = body })) + @ [ { AST.Patterns = AST.NonEmptyList.singleton AST.PWildcard + AST.Guard = None + AST.Body = lastBody } ] + let chain = AST.Match(AST.Var cv, arms) + // No `If` anywhere: an If in atom position needs both branches eagerly safe, + // and every branch here would hold a `slice` Call. Default indexOf to LENGTH + // instead of -1 and the branches vanish -- slice clamps, so with no newline + // slice(s,0,len) is the whole string and slice(s,len+1,len) is "". Ok( AST.Let( sv, src, AST.Let( - iv, - AST.TypeApp( - "Stdlib.Option.withDefault", - [ AST.TInt64 ], - AST.NonEmptyList.fromList - [ AST.Call("Stdlib.String.indexOf", AST.NonEmptyList.fromList [ sVar; AST.StringLiteral "\n" ]) - AST.Int64Literal -1L ]), + lv, + AST.Call("Stdlib.String.length", AST.NonEmptyList.singleton sVar), AST.Let( - cv, - AST.If( - AST.BinOp(AST.Lt, iVar, AST.Int64Literal 0L), - sVar, - AST.Call("Stdlib.String.slice", AST.NonEmptyList.fromList [ sVar; AST.Int64Literal 0L; iVar ])), + iv, + AST.TypeApp( + "Stdlib.Option.withDefault", + [ AST.TInt64 ], + AST.NonEmptyList.fromList + [ AST.Call("Stdlib.String.indexOf", AST.NonEmptyList.fromList [ sVar; AST.StringLiteral "\n" ]) + AST.Var lv ]), AST.Let( - rv2, - AST.If( - AST.BinOp(AST.Lt, iVar, AST.Int64Literal 0L), - AST.StringLiteral "", + cv, + AST.Call("Stdlib.String.slice", AST.NonEmptyList.fromList [ sVar; AST.Int64Literal 0L; iVar ]), + AST.Let( + rv2, AST.Call( "Stdlib.String.slice", AST.NonEmptyList.fromList - [ sVar - AST.BinOp(AST.Add, iVar, AST.Int64Literal 1L) - AST.Call("Stdlib.String.length", AST.NonEmptyList.singleton sVar) ])), - chain)))))) + [ sVar; AST.BinOp(AST.Add, iVar, AST.Int64Literal 1L); AST.Var lv ]), + chain))))))) | _ -> Error $"unmarshal: no sum def {name}" | other -> Error $"unmarshalable-return: {other}" diff --git a/backend/src/LibCompiler/stdlib/Float.dark b/backend/src/LibCompiler/stdlib/Float.dark index 8845ff1a24..16bd8c7528 100644 --- a/backend/src/LibCompiler/stdlib/Float.dark +++ b/backend/src/LibCompiler/stdlib/Float.dark @@ -9,6 +9,22 @@ def Stdlib.Float.multiply(a: Float, b: Float) : Float = a * b // Get IEEE 754 bit representation of Float as UInt64 (intrinsic) def Stdlib.Float.toBits(f: Float) : UInt64 = 0UL +// The inverse of toBits: reinterpret a 64-bit pattern as a Float. +// +// No new intrinsic needed -- store the bits, load them back at Float type. +// `__raw_get` already lowers to RawGet + GpToFp (a movq into an xmm), which is +// precisely the reinterpret; see passes/4_MIR_to_LIR.fs. toBits had no inverse at all, +// so a Float could not be RECONSTRUCTED in compiled code, which blocked decoding any +// type containing one (Json's `Number of Float` -> altJsonParse). +// +// Takes Int64, not UInt64, on purpose: this is a BIT PATTERN, and the signed/unsigned +// label is irrelevant to the 64 bits stored. It also keeps us away from the compiler's +// signed-comparison bug on unsigned values (see PROGRESSION-LOG). +def Stdlib.Float.fromBits(bits: Int64) : Float = + let ptr = __raw_alloc(8) in + let _ = __raw_set(ptr, 0, bits) in + __raw_get(ptr, 0) + // IEEE 754 double precision format: // Sign: bit 63 (1 bit) // Exponent: bits 52-62 (11 bits, biased by 1023) From a6b7ce1dc092e68b9ecf08297a231a4e9218624f Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 08:25:17 -0400 Subject: [PATCH 159/172] compiler: Option/Result decoders were still If-based (+28) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The custom-type decoders got Match + Let-bound payloads last commit; the Option and Result decoders didn't, and they have the same two problems: - An If in ATOM position needs BOTH branches eagerly safe, and the payload body can be an If itself (the TList decoder is `if wire == "" then [] else map …`) — illegal as a constructor arg. This is what "ANF conversion error: If expression requires lazy branch lowering" was, and it had grown into the 6th-biggest blocker at 39 fns (11 of them pre-existing, 28 exposed by the decoder work getting those fns further down the pipe). - An If also decodes the Some payload on the None path, where there is no payload. Match arms are lazy and each payload is now bound to a var first, so atom positions hold plain vars. Same shape as the marshal side. Verified: aligned per-hash diff over the 2900 lines measured on BOTH sides, 0 regressions, +28. Lazy-branch errors 30 -> 3 in the comparable set. Option through the daemon still decodes (marshal self-test -> /home/dark), listhnd 3, and AltJson.parse still matches on 3.14 / nested / error paths. Method note: this diff took ~30s, not the ~35min the last several did. Comparing only the lines MEASURED on both sides is a valid aligned diff — the padded lines are unknown on both sides and are the same ~1000 pathological fns every run. The two-phase repair only ever made the HEADLINE COUNT exact; it never gated regressions, and paying it per commit was pure waste. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 29 +++++++++++++++---- 1 file changed, 23 insertions(+), 6 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 14c0c42a20..57d16059af 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -1179,29 +1179,46 @@ let rec unmarshalTypedSeen | AST.TBool -> Ok(AST.BinOp(AST.Eq, src, AST.StringLiteral "true")) | AST.TUnit -> Ok(AST.Let(rv, src, AST.UnitLiteral)) | AST.TSum("Stdlib.Option.Option", [ inner ]) -> + // Match, not If, and the payload bound to a var first -- for the same two reasons as + // the custom-type decoders. (a) An If in atom position needs BOTH branches eagerly + // safe, and `body` can be an If itself (the TList decoder is `if wire == "" then [] + // else map …`), which is illegal as a constructor ARG. (b) An If would also decode + // the payload on the None path, where there is no payload. Match arms are lazy. + let sv = "__uo" + string d unmarshalTypedR (d + 1) inner (unesc (slice r (AST.Int64Literal 5L) (len r))) |> Result.map (fun body -> AST.Let( rv, src, - AST.If( + AST.Match( starts r "Some\n", - AST.Constructor(optT, "Some", Some body), - AST.Constructor(optT, "None", None)))) + [ { AST.Patterns = AST.NonEmptyList.singleton (AST.PBool true) + AST.Guard = None + AST.Body = AST.Let(sv, body, AST.Constructor(optT, "Some", Some(AST.Var sv))) } + { AST.Patterns = AST.NonEmptyList.singleton AST.PWildcard + AST.Guard = None + AST.Body = AST.Constructor(optT, "None", None) } ]))) | AST.TSum("Stdlib.Result.Result", [ okT; errT ]) -> match unmarshalTypedR (d + 1) errT (unesc (slice r (AST.Int64Literal 6L) (len r))), unmarshalTypedR (d + 1) okT (unesc (slice r (AST.Int64Literal 3L) (len r))) with | Ok errBody, Ok okBody -> + // Match + bound payloads, same reasoning as the Option case above. + let ev2 = "__ure" + string d + let ov2 = "__uro" + string d Ok( AST.Let( rv, src, - AST.If( + AST.Match( starts r "Error\n", - AST.Constructor(resT, "Error", Some errBody), - AST.Constructor(resT, "Ok", Some okBody)))) + [ { AST.Patterns = AST.NonEmptyList.singleton (AST.PBool true) + AST.Guard = None + AST.Body = AST.Let(ev2, errBody, AST.Constructor(resT, "Error", Some(AST.Var ev2))) } + { AST.Patterns = AST.NonEmptyList.singleton AST.PWildcard + AST.Guard = None + AST.Body = AST.Let(ov2, okBody, AST.Constructor(resT, "Ok", Some(AST.Var ov2))) } ]))) | Error e, _ | _, Error e -> Error e | AST.TList inner -> let ev = "__rpce_" + string d From e0806d2bdedd217be1bd3fa5864a36af93c95478 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 08:35:36 -0400 Subject: [PATCH 160/172] =?UTF-8?q?compiler:=20zeroLit=20emitted=20an=20un?= =?UTF-8?q?resolvable=20name=20=E2=80=94=20Bytes=20fns=20never=20compiled?= =?UTF-8?q?=20(+31)?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit "There is no variable named: Stdlib.__int64_to_bytes" was the 7th-biggest blocker (35 fns) and read like a missing compiler primitive. It wasn't: the intrinsic is registered (LibCompiler/Stdlib.fs:139) and matched (passes/2_AST_to_ANF.fs:291) under its BARE name, while zeroLit called it QUALIFIED — so it resolved to nothing and every Bytes-taking fn failed the compile-check. A harness bug wearing a compiler bug's clothes; the third time on this branch that a generated NAME, not a missing capability, was the wall. zeroLit now calls Stdlib.Bytes.create(0), a real empty blob. The old form also cast 0 into a NULL Bytes pointer, which its "compile-check only, never run" comment was quietly covering for; Bytes.create(0) is safe even if it does run. Then the same fns were `noargs`, and then `skip|arg-literal: value-dval: DBlob` — the sampler couldn't build a Blob and dvalToAst couldn't lower one. Both added: - sampleArg TBlob -> "hé" (68 c3 a9). NON-ASCII on purpose: a pure-ASCII sample cannot distinguish a byte-correct implementation from a char-based one, which is exactly how the String.length / toUppercase routing bugs hid on this branch. - dvalToAst DBlob -> Stdlib.Bytes.fromList([bytes]), the shape marshalTypedSeen uses. Ephemeral only; a Persistent blob is a content hash needing IO, so it stays an Error rather than a guess. Verified: all 31 fns carrying this blocker now compile (31/31 True). Fast regression gate over a 400-fn sample of known-good: 0 regressions, 40s. Differential on 11 of them: 7 match, **0 DIFF**, 4 crash — unmasked rather than bucketed: 2 SIGSEGV and 2 exit-1 (one is a server handler that plausibly wants an environment it hasn't got). The segfaults are not miscompiles (no wrong answer, the binary dies) but are real and now filed as task #26 — running Blob-taking fns is newly possible, so this is the first time anything could see them. --- .../Builtins.Compiler/Libs/Compiler.fs | 30 ++++++++++++++++--- 1 file changed, 26 insertions(+), 4 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 07d360ccb8..4cd1f1d439 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -309,6 +309,16 @@ let rec private dvalToAst (d : Dval) : Result = match d with | DUnit -> Ok AST.UnitLiteral | DBool b -> Ok(AST.BoolLiteral b) + // There is no Bytes literal in the AST, so rebuild the blob from its byte values via + // the real allocator -- the same shape marshalTypedSeen uses for TBytes. Only Ephemeral + // is reachable here (a sampled/So-far-computed blob); a Persistent one is a content + // hash needing IO, so it stays an honest Error rather than a guess. + | DBlob(Ephemeral eph) -> + Ok( + AST.Call( + "Stdlib.Bytes.fromList", + AST.NonEmptyList.singleton ( + AST.ListLiteral(eph.bytes |> Array.toList |> List.map (int64 >> AST.Int64Literal))))) | DInt8 n -> Ok(AST.Int8Literal n) | DUInt8 n -> Ok(AST.UInt8Literal n) | DInt16 n -> Ok(AST.Int16Literal n) @@ -654,10 +664,16 @@ let rec private zeroValue | _ -> AST.Lambda(AST.NonEmptyList.fromList ps, body)) | AST.TVar _ -> zeroLit AST.TInt64 // an unmapped signature tvar: monomorphize at Int64 | AST.TBytes -> - // No bytes literal exists in the AST; synthesize an empty blob via the cast - // intrinsic. Only ever used to make a fn reachable for a compile-check (never - // run), so it just needs to typecheck to Bytes. - Ok(AST.Call("Stdlib.__int64_to_bytes", AST.NonEmptyList.fromList [ AST.Int64Literal 0L ])) + // No bytes literal exists in the AST, so call the real allocator for an empty blob. + // + // This used to be `Stdlib.__int64_to_bytes(0)` and it NEVER WORKED: the intrinsic is + // registered and matched under its BARE name (Stdlib.fs:139, 2_AST_to_ANF.fs:291), so + // the qualified form resolved to nothing and every Bytes-taking fn died with "There + // is no variable named: Stdlib.__int64_to_bytes" — 35 fns, the 7th-biggest blocker, + // and a HARNESS bug wearing a compiler bug's clothes. (It also cast 0 into a NULL + // Bytes pointer, which the "compile-check only, never run" comment was covering for.) + // Bytes.create(0) is a real empty blob and is safe even if it does get run. + Ok(AST.Call("Stdlib.Bytes.create", AST.NonEmptyList.fromList [ AST.Int64Literal 0L ])) | prim -> zeroLit prim /// Compile-check one package fn by hash (bridge its call-graph, make it @@ -1116,6 +1132,12 @@ let rec private sampleArg (t : PT.TypeReference) : Option = match t with | PT.TUnit -> Some DUnit | PT.TBool -> Some(DBool true) + // A Blob sample: without this every Blob-taking fn was `noargs` — compiled but + // unprovable. Non-ASCII on purpose ("hé" = 68 c3 a9): a pure-ASCII sample can't tell a + // byte-correct implementation from a char-based one, which is exactly how the + // String.length / toUppercase routing bugs hid. Short, because the interpreter runs it + // twice per check. + | PT.TBlob -> Some(LibExecution.Blob.newEphemeral(System.Text.Encoding.UTF8.GetBytes "hé")) // Small on purpose: a sample arg must be cheap as well as realistic. 42 hung the // whole sweep on the first exponential fn it met (fib(42) interpreted is ~2000x // fib(27), which already takes 21s), and every chunk timed out with zero output. From 825511ddd7b3e652e2d8b6bd235e21838c2e0646 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 09:18:10 -0400 Subject: [PATCH 161/172] compiler: work around a record-literal SIGSEGV (List field + >=2-byte Blob field) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Found a REAL codegen bug and worked around it in the two places that emit a RecordLiteral. Minimal repro (task #26), an Http.Request { url: String; headers: List; body: Blob } handed to a fn that just calls responseWithText: hdrs=[] body="" -> match hdrs=[] body="hé" -> match <- blob alone fine, ANY size hdrs=[("a","b")] body="" -> match <- list alone fine hdrs=[("a","b")] body="x" (1 byte) -> match hdrs=[("a","b")] body="xy" (2 bytes) -> crash|139 hdrs=[("a","b")] body="é" (2 bytes) -> crash|139 SIGSEGV iff a record holds a NON-EMPTY List and a >=2-BYTE Blob, both built inline in the literal. It's size, not content: "xy" crashes, "x" doesn't. Neither ingredient faults alone at any size — two heap objects in one record literal, one clobbering the other. Binding each to a Let first fixes it, which is what proved the diagnosis. Ruled out first, since my own Blob work exposed it (each matches): the Bytes.fromList arg literal (Blob.toHex), the Response marshaller (Http.success takes a Blob AND returns a Response), Bytes.fromList itself (String.toBytes "héllo日本", 12 bytes), and the fn body (matches with explicit args in every non-crashing combo). Bytes.fromList's layout is also correct: __raw_alloc(16+len), length at 0, bytes at 8.., refcount at 8+len. The workaround is GATED on exactly that shape, and the gate is the whole story. Hoisting costs TYPE PROPAGATION — a record-field position pushes the field's declared type into the expression, a Let does not, so a hoisted field infers alone and its fresh tvar stops unifying. Measured, twice: hoisting every field regressed Stachu.Parser.many ("expected T.830ffbde>, got T.830ffbde>"); hoisting every CALL field still regressed Cli.Packages.Deprecate.parseArgs ("expected (String, List), got (String, List)"). That's the fifth instance of this branch's tvar-vs-unification trap. So: hoist only when the record actually has both a List and a Bytes field, and only the call-shaped fields. Every other record compiles exactly as before. This is a WORKAROUND. The codegen bug is still live for anyone else emitting a RecordLiteral, and the strongest lead is recorded in PROGRESSION-LOG + task #26: __writeListHelper writes one byte then RECURSES — len=1 does a single write with no recursion, len>=2 recurses, matching the crash threshold exactly. Look there and at 2.5_RefCountInsertion.fs next. Verified: full known-good gate (1840), 0 regressions — 1640 measured, one 200-fn chunk unmeasured and EXCLUDED rather than padded to False (padding fabricates regressions). Both previously-segfaulting fns now `match`. Also worth noting the 400-fn SAMPLE gate said 0 regressions while the full set found parseArgs: samples are for iterating, the full set is for committing. --- .../src/Builtins/Builtins.Compiler/Bridge.fs | 62 ++++++++++++++++++- .../Builtins.Compiler/Libs/Compiler.fs | 25 +++++++- 2 files changed, 83 insertions(+), 4 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index 57d16059af..cce5e71b82 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -1585,10 +1585,68 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = | PT.ERecord(_, nr, _, fields) -> typeHash nr |> Result.bind (fun h -> + // Hoisting costs TYPE PROPAGATION: a record-field position pushes the field's + // declared type into the expression, a Let does not, so a hoisted field infers + // independently and its fresh tvar no longer unifies. Measured, not guessed — + // hoisting every field regressed Stachu.Parser.many ("expected + // T.830ffbde>, got T.830ffbde>"), and hoisting every CALL field + // still regressed Cli.Packages.Deprecate.parseArgs ("expected (String, List), + // got (String, List)"). Same tvar-vs-unification trap this branch keeps + // hitting. + // + // So apply the workaround ONLY to the shape that actually miscompiles: a record + // whose def has BOTH a List field and a Bytes field (task #26 — such a record + // SIGSEGVs when the list is non-empty and the blob is >=2 bytes). Every other + // record is left exactly as it was, which is why this costs 0 regressions. + let needsHoist = + match Map.tryFind (nameForType h) ctx.TypeDefs with + | Some(AST.RecordDef(_, _, defFields)) -> + let isL = defFields |> List.exists (fun (_, t) -> match t with AST.TList _ -> true | _ -> false) + let isB = defFields |> List.exists (fun (_, t) -> match t with AST.TBytes -> true | _ -> false) + isL && isB + | _ -> false fields - |> List.map (fun (fname, fexpr) -> recurse fexpr |> Result.map (fun be -> (fname, be))) + |> List.mapi (fun i (fname, fexpr) -> + recurse fexpr + |> Result.map (fun be -> + // Only a CALL can clobber (it allocates and burns registers); literals are + // harmless inline and keep the type context they need. + match be with + | (AST.Call _ | AST.TypeApp _ | AST.Apply _) when needsHoist -> (fname, Some $"__rf{i}_", be) + | _ -> (fname, None, be))) |> allOk - |> Result.map (fun fs -> AST.RecordLiteral(nameForType h, fs))) + |> Result.map (fun fs -> + // Bind call-shaped fields to a Let, then build the record from vars, rather than + // inlining them. + // + // A RecordLiteral holding a CALL field next to a LIST field MISCOMPILES to a + // SIGSEGV. Proven minimal (task #26): Http.Request { headers: List; + // body: Blob } -> headers=[] is fine at any blob size, a 1-byte blob is fine with + // headers, but a NON-EMPTY list + a >=2-BYTE blob segfaults. It's size, not + // content: "xy" crashes, "x" doesn't. Two heap objects built inline in one record + // literal, and one clobbers the other; hoisting each into a Let fixes it, which is + // what proved the diagnosis. + // + // This is a WORKAROUND, not the fix — the codegen bug is still there for anyone + // else emitting a RecordLiteral. But it's the same discipline the decoders needed + // (keep calls out of inline positions), it costs nothing, and it makes real Dark + // code that builds such a record stop crashing. + let rec2 = + AST.RecordLiteral( + nameForType h, + fs + |> List.map (fun (n, vn, e) -> + match vn with + | Some v -> (n, AST.Var v) + | None -> (n, e))) + fs + |> List.rev + |> List.fold + (fun acc (_, vn, e) -> + match vn with + | Some v -> AST.Let(v, e, acc) + | None -> acc) + rec2)) | PT.ERecordFieldAccess(_, record, fieldName) -> recurse record |> Result.map (fun r -> AST.RecordAccess(r, fieldName)) | PT.ERecordUpdate(_, record, updates) -> diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 4cd1f1d439..dede30b6b5 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -350,9 +350,30 @@ let rec private dvalToAst (d : Dval) : Result = |> Result.bind (fun h -> fields |> Map.toList - |> List.map (fun (n, v) -> dvalToAst v |> Result.map (fun v' -> (n, v'))) + |> List.mapi (fun i (n, v) -> dvalToAst v |> Result.map (fun v' -> (n, $"__dr{i}_", v'))) |> allOk - |> Result.map (fun fs -> AST.RecordLiteral(Bridge.nameForType h, fs))) + |> Result.map (fun fs -> + // Bind fields to Lets ONLY for the shape that miscompiles: a record holding BOTH + // a non-empty List and a >=2-byte Blob SIGSEGVs when both are built inline in the + // record literal (task #26 — proven minimal; hoisting is what diagnosed it). + // + // Gated, because hoisting costs TYPE PROPAGATION: the record-field position pushes + // the field's declared type in, a Let doesn't, so a hoisted field infers on its own + // and its fresh tvar stops unifying. Measured: an ungated hoist here regressed + // Cli.Packages.Deprecate.parseArgs ("expected (String, List), got (String, + // List)"). Same tvar trap the bridge's ERecord hit. + let hasList = fields |> Map.exists (fun _ v -> match v with DList _ -> true | _ -> false) + let hasBlob = + fields + |> Map.exists (fun _ v -> + match v with + | DBlob(Ephemeral e) -> e.bytes.Length >= 2 + | _ -> false) + if hasList && hasBlob then + let rec2 = AST.RecordLiteral(Bridge.nameForType h, fs |> List.map (fun (n, vn, _) -> (n, AST.Var vn))) + fs |> List.rev |> List.fold (fun acc (_, vn, e) -> AST.Let(vn, e, acc)) rec2 + else + AST.RecordLiteral(Bridge.nameForType h, fs |> List.map (fun (n, _, e) -> (n, e))))) | DEnum(_, rtName, _, caseName, fields) -> typeNameHash rtName |> Result.bind (fun h -> From bd26827bd05aec2be45d9f394be0fff770ccf01e Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 09:41:25 -0400 Subject: [PATCH 162/172] compiler: package values of Blob/Uuid type + Persistent blobs (+7) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Unmasked the `unsupported-value` bucket (105, the 2nd-biggest blocker). It wasn't one thing — five, and two were just missing cases: 33 unresolved value name 25 value-type: KTBlob 14 value-type: KTUuid 10 value-dval: DApplicable 1 value-dval: DUuid valueTypeToAst had no KTBlob/KTUuid case, so a package VALUE of a type that params and returns already handle fine couldn't bridge. Added both to the conventions bridgeType already set (TBlob -> TBytes, TUuid -> canonical TString), plus dvalToAst's DUuid to match dvalToWire's `DUuid g -> string g`. Three places now agree per type instead of two. That exposed the real one: `value-dval: DBlob` for all 25. A package value lives in the DB, so its blobs are PERSISTENT — a content hash into package_blobs — while dvalToAst can only lower Ephemeral, because it's pure and resolving a hash is IO. Fix: materializeBlobs walks a Dval in valueFnDef's existing Ply context (via LibDB.RuntimeTypes.Blob.get) and swaps Persistent for Ephemeral before lowering, so dvalToAst stays pure. The same gap was silently corrupting the HARNESS. The differential reported 2 DIFFs: c=\n\n403 | i=?unmarshalable:DBlob\n\n403 The compiled side was RIGHT; dvalToWire simply couldn't encode a Persistent blob in the interpreter's result and emitted its marker, which the harness then read as a mismatch. equivOne now materializes before wiring — both DIFFs are `match`. Applied to BOTH interpreter runs, or the nondet check would compare unlike things. **+7, not +40** — the histogram counts each fn's FIRST blocker. 19 of the remaining 33 now report httpClientRequest_v0, the current #1. The fix landed; those fns just have another wall behind it. Verified: full known-good gate (1840/1840 measured), 0 regressions, then a 400 sample after the equivOne change, 0 regressions. Differential on the value fns: 2 match (were DIFF), 0 miscompiles. Self-tests pass (marshal /home/dark, listhnd 3), recursive JSON still matches, and the record-literal segv workaround still holds. --- .../Builtins.Compiler/Libs/Compiler.fs | 72 ++++++++++++++++++- 1 file changed, 69 insertions(+), 3 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index dede30b6b5..f8a4e4bac8 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -288,6 +288,12 @@ let rec private valueTypeToAst (fresh : unit -> string) (vt : ValueType) : Resul | KTFloat -> Ok AST.TFloat64 | KTChar -> Ok AST.TChar | KTString -> Ok AST.TString + // Match the conventions bridgeType already set for the same types, so a package + // VALUE of these types bridges the same way a param/return of them does. Their + // absence here was the 2nd and 3rd biggest slices of the `unsupported-value` bucket + // (KTBlob 25, KTUuid 14) — nothing deep, just cases nobody had needed yet. + | KTBlob -> Ok AST.TBytes // bridgeType: PT.TBlob -> AST.TBytes + | KTUuid -> Ok AST.TString // bridgeType: PT.TUuid -> AST.TString (canonical string) | KTList inner -> valueTypeToAst inner |> Result.map AST.TList | KTDict v -> valueTypeToAst v |> Result.map (fun v' -> AST.TDict(AST.TString, v')) | KTTuple(a, b, rest) -> @@ -319,6 +325,9 @@ let rec private dvalToAst (d : Dval) : Result = "Stdlib.Bytes.fromList", AST.NonEmptyList.singleton ( AST.ListLiteral(eph.bytes |> Array.toList |> List.map (int64 >> AST.Int64Literal))))) + // A Uuid travels as its canonical string, exactly as bridgeType (PT.TUuid -> TString) + // and dvalToWire (DUuid g -> string g) already treat it. Keep the three in step. + | DUuid g -> Ok(AST.StringLiteral(string g)) | DInt8 n -> Ok(AST.Int8Literal n) | DUInt8 n -> Ok(AST.UInt8Literal n) | DInt16 n -> Ok(AST.Int16Literal n) @@ -388,9 +397,61 @@ let rec private dvalToAst (d : Dval) : Result = /// `def __val.(__unit: Unit) : T = `. A Unit param is how the /// compiler spells a nullary fn (normalizeNullaryCallArgs drops it at the call /// site), since FunctionDef.Params is a NonEmptyList. +/// Resolve every PERSISTENT blob in a Dval into an Ephemeral one, fetching its bytes. +/// +/// A package value lives in the DB, so its blobs are Persistent — a content hash into +/// package_blobs — while dvalToAst can only lower Ephemeral (it's pure; resolving a hash +/// is IO). That mismatch was the whole `value-dval: DBlob` bucket: the TYPE bridged fine +/// (KTBlob -> TBytes) and then the VALUE couldn't. Materialize here, where we're already +/// in Ply and can do the lookup, and dvalToAst stays pure. +let rec private materializeBlobs (d : Dval) : Ply = + uply { + match d with + | DBlob(Persistent(h, _)) -> + let! bytes = LibDB.RuntimeTypes.Blob.get h + match bytes with + | Some bs -> return LibExecution.Blob.newEphemeral bs + | None -> return d // missing row: leave it, dvalToAst reports it honestly + | DList(vt, xs) -> + let mutable acc = [] + for x in xs do + let! x' = materializeBlobs x + acc <- acc @ [ x' ] + return DList(vt, acc) + | DTuple(a, b, rest) -> + let! a' = materializeBlobs a + let! b' = materializeBlobs b + let mutable acc = [] + for r in rest do + let! r' = materializeBlobs r + acc <- acc @ [ r' ] + return DTuple(a', b', acc) + | DRecord(o, t, targs, fields) -> + let mutable acc = [] + for (k, v) in Map.toList fields do + let! v' = materializeBlobs v + acc <- acc @ [ (k, v') ] + return DRecord(o, t, targs, Map.ofList acc) + | DEnum(o, t, targs, c, fields) -> + let mutable acc = [] + for v in fields do + let! v' = materializeBlobs v + acc <- acc @ [ v' ] + return DEnum(o, t, targs, c, acc) + | other -> return other + } + let private valueFnDef (hash : string) : Ply> = uply { - let! v = LibDB.PackageManager.rt.getValue (FQValueName.package hash) + let! v0 = LibDB.PackageManager.rt.getValue (FQValueName.package hash) + let! v = + match v0 with + | None -> Ply None + | Some pv -> + uply { + let! body = materializeBlobs pv.body + return Some { pv with body = body } + } match v with | None -> return Error "package value has no evaluated rt_dval" | Some pv -> @@ -1411,7 +1472,12 @@ let private equivOne argsNE) .Result with - | Ok v -> Ok(dvalToWire v) + // Materialize PERSISTENT blobs before wiring: dvalToWire is pure + // and can only encode Ephemeral, so a result holding a package + // blob emitted "?unmarshalable:DBlob" and reported a false DIFF + // (c=\n\n403 vs i=?unmarshalable:DBlob\n\n403) — the compiled + // side was right, the harness just couldn't say so. + | Ok v -> Ok(dvalToWire (Ply.toTask (materializeBlobs v)).Result) | Error(_, e) -> Error(string e) with e -> Error("exn: " + e.Message) // Run the interpreter a SECOND time: a fn that disagrees with @@ -1431,7 +1497,7 @@ let private equivOne argsNE) .Result with - | Ok v -> Ok(dvalToWire v) + | Ok v -> Ok(dvalToWire (Ply.toTask (materializeBlobs v)).Result) | Error(_, e) -> Error(string e) with e -> Error("exn: " + e.Message) match interp, interp2 with From e317c2d01d69bfa9a419182033d99b5f074b90d5 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 10:00:18 -0400 Subject: [PATCH 163/172] =?UTF-8?q?compiler:=20rtToMarshalable=20had=20no?= =?UTF-8?q?=20TTuple=20case=20=E2=80=94=20httpClientRequest=20unroutable?= =?UTF-8?q?=20(+21)?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit httpClientRequest was the biggest category in the histogram (164 fns) and the reason was one missing case: httpClientRequest(method: String, uri: String, headers: List<(String,String)>, body: Blob) : Result Every layer already handled tuples — marshalTypedSeen encodes them, wireToDvalTyped decodes them daemon-side, unmarshalTypedSeen decodes them in compiled code. Only rtToMarshalable, which decides whether a builtin is routable AT ALL, had no TTuple case, so `headers` made the whole builtin unroutable. The Blob body and the custom-type Result return, the parts that looked hard, were already handled by earlier work this session. After the fix `httpClientRequest` does not appear as a blocker ANYWHERE in those 128 fns (0 mentions, was every one of them). **+21, not +128** — the histogram counts each fn's FIRST blocker, and the other 107 hit real type errors behind it (e.g. "Type mismatch in variable e: expected String, got T.8dc77b20…" — a ParseError landing where a String is expected). Those are separate problems, now visible. Verified: full known-good gate, 1840/1840 measured, 0 regressions. **Differential deliberately NOT run on the gains, and this is a real limitation, not an oversight.** These fns call httpClientRequest, and routing means the daemon invokes the REAL builtin — so the harness would fire actual HTTP requests at whatever URL the sampler invents. That's outward-facing and unauthorized, and a network response isn't deterministic, so "equivalent" isn't even well-defined for them. Compile coverage is all that's claimed here. The TUPLE path itself IS proven, via a safe route: AltJson.parse decodes `Object of List<(String * Json)>` — a list of tuples across the wire — and matches on {"a":1}, {"a":1,"b":[true,null]}, and [1.5,{"b":[true,null]}]. dictToList would have been the obvious test but it stays deliberately unrouted (Dict iteration order differs between the engines). --- .../src/Builtins/Builtins.Compiler/Libs/Compiler.fs | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index f8a4e4bac8..6ddabf2cdb 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -153,6 +153,18 @@ let rec private rtToMarshalable (t : TypeReference) : AST.Type option = // exactly the input the "WithReplacement" in its name is about. | TBlob -> Some AST.TBytes | TList inner -> rtToMarshalable inner |> Option.map AST.TList + // Tuples: every other layer already handled them — marshalTypedSeen encodes them, + // wireToDvalTyped decodes them daemon-side, unmarshalTypedSeen decodes them in compiled + // code. Only this function, which decides whether a builtin is routable AT ALL, had no + // case, so any builtin with a tuple anywhere in its params was silently unroutable. + // That's what blocked httpClientRequest (headersType = List<(String, String)>), the + // single biggest category in the current histogram at 164 fns. + | TTuple(a, b, rest) -> + (a :: b :: rest) + |> List.map rtToMarshalable + |> fun bs -> + if List.forall Option.isSome bs then Some(AST.TTuple(bs |> List.map Option.get)) + else None | TCustomType(nr, args) -> match nr.resolved with | Ok(FQTypeName.Package(Hash h)) -> From df5c7f7d5a4716bb50be909f65902c57a9bbdcc4 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 10:59:08 -0400 Subject: [PATCH 164/172] compiler: bridge `if` without `else` as `else ()` (+4) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The bridge hard-failed `if cond then e` (no else) with "unsupported-if: if without else" — 35 fns. It's exactly `if cond then e else ()`. Verified against the interpreter, not assumed: `let f (b: Bool) : Unit = if b then printLine "x"` returns unit for BOTH b=true (branch runs) and b=false (branch skipped). The then-branch is Unit-typed or the fn wouldn't typecheck, so an implicit unit else is type-correct as well as semantically right. +4, not +35 — the histogram counts each fn's FIRST blocker, and `if without else` no longer appears anywhere in those 35 (0 mentions, was all of them); the other 31 moved on to pmSearch / dateTimeToString / unresolved-value. Verified: full known-good gate (1942/1942 measured), 0 regressions. Differential on the set: 2 match, 0 miscompiles, rest noargs (custom-type params the sampler can't build) — the empirical semantics check above is the stronger guarantee for this one. --- backend/src/Builtins/Builtins.Compiler/Bridge.fs | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Bridge.fs b/backend/src/Builtins/Builtins.Compiler/Bridge.fs index cce5e71b82..952568eb1e 100644 --- a/backend/src/Builtins/Builtins.Compiler/Bridge.fs +++ b/backend/src/Builtins/Builtins.Compiler/Bridge.fs @@ -1577,7 +1577,14 @@ let rec bridgeExpr (ctx : BridgeCtx) (e : PT.Expr) : Result = |> Result.bind (fun c -> recurse thenE |> Result.bind (fun t -> recurse elseE |> Result.map (fun el -> AST.If(c, t, el)))) - | PT.EIf(_, _, _, None) -> err "if" "if without else" + // `if cond then e` (no else) is exactly `if cond then e else ()`. Verified against the + // interpreter rather than assumed: `let f (b: Bool) : Unit = if b then printLine "x"` + // returns unit for BOTH b=true (branch runs) and b=false (branch skipped). The + // then-branch is Unit-typed or the fn wouldn't typecheck, so an implicit unit else is + // type-correct as well as semantically right. + | PT.EIf(_, cond, thenE, None) -> + recurse cond + |> Result.bind (fun c -> recurse thenE |> Result.map (fun t -> AST.If(c, t, AST.UnitLiteral))) | PT.ELet(_, pat, value, body) -> recurse value |> Result.bind (fun v -> recurse body |> Result.bind (fun b -> bindPattern pat v b)) From 5d54d875c588e60325c6487dc90269106eb826c7 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 11:16:00 -0400 Subject: [PATCH 165/172] compiler: bound the interpreter side of equivOne (priority 3, the 79 timeouts) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit equivOne fenced the compiled binary (`CompilerLibrary.execute 0 timeoutMs`) but ran the interpreter as a bare `.Result` — UNBOUNDED — and did so TWICE (the nondet double-run). So one exponential fn stalled a whole differential chunk indefinitely; this was the "79 interpreter timeouts blocking proof" that the priority list has carried for many iterations. Fix: run each interpreter call as `task.Wait(timeoutMs)`. A completed wait decodes as before; a miss reports `itimeout` — deliberately distinct from `ierr` (a real interpreter error) and from a DIFF, so it reads as "couldn't prove in the budget", never a false mismatch. Both runs now go through one `runInterp ()` helper (removes the duplicated block), and a timeout on EITHER run short-circuits to `itimeout`. Verified: full differential over 40 known-good fns completes in 9.9s (was: a single slow fn could hang the run forever) — 20 match, 0 DIFF. Fast path intact: JSON and fib(10) still `match`, no false `itimeout` on fns that finish in budget. Touches only equivOne (the harness), so compile coverage is unaffected by construction; SAMPLE=400 gate confirms 0 regressions. HONEST CAVEAT: .NET has no interpreter cancellation, so `Wait` frees the HARNESS thread but the timed-out Task keeps running in the background until the process exits — it burns a core until then. That's still strictly better than the old bare `.Result`, which blocked the harness thread forever, and in a sweep the process is short-lived and killed at the end (plus the sweep's own per-fn `timeout` + 6GB watchdog bound it). A real fix needs a cancellation token threaded through Execution.executeFunction; filed as follow-up. I did NOT catch a live fn hitting `itimeout` in these samples (none was slow enough at a 10s bound), so that verdict path is proven by construction (Task.Wait(ms):bool) rather than by a captured case. --- .../Builtins.Compiler/Libs/Compiler.fs | 63 ++++++++----------- 1 file changed, 27 insertions(+), 36 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 6ddabf2cdb..b42caea3f3 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -1470,49 +1470,40 @@ let private equivOne let raw = out.Stdout let compiled = if raw.EndsWith "\n" then raw.Substring(0, raw.Length - 1) else raw - let interp = + // Run the interpreter with the SAME bound the compiled binary got. + // Previously this was a bare `.Result` — UNBOUNDED — so the per-fn + // timeout only ever fenced the compiled side. An exponential fn + // (fib 35 interpreted) ran for minutes here, TWICE (the nondet + // check), defeating the whole per-fn budget: this was the "79 + // interpreter timeouts" that stalled the proof sweeps. Task.Wait(ms) + // gives a real deadline; a miss is reported as `itimeout`, distinct + // from a genuine interpreter error (`ierr`), so it's an honest + // "couldn't prove in time", not a false DIFF and not a crash. + let runInterp () : Result = try let argsNE = match args with | [] -> NEList.singleton DUnit | _ -> NEList.ofList args.Head args.Tail - match - (LibExecution.Execution.executeFunction - exeState - (FQFnName.fqPackage hash) - [] - argsNE) - .Result - with - // Materialize PERSISTENT blobs before wiring: dvalToWire is pure - // and can only encode Ephemeral, so a result holding a package - // blob emitted "?unmarshalable:DBlob" and reported a false DIFF - // (c=\n\n403 vs i=?unmarshalable:DBlob\n\n403) — the compiled - // side was right, the harness just couldn't say so. - | Ok v -> Ok(dvalToWire (Ply.toTask (materializeBlobs v)).Result) - | Error(_, e) -> Error(string e) - with e -> Error("exn: " + e.Message) - // Run the interpreter a SECOND time: a fn that disagrees with - // itself (uuidGenerate, random, clock) can't be compared to - // anything, and would otherwise be reported as a false DIFF. - let interp2 = - try - let argsNE = - match args with - | [] -> NEList.singleton DUnit - | _ -> NEList.ofList args.Head args.Tail - match - (LibExecution.Execution.executeFunction - exeState - (FQFnName.fqPackage hash) - [] - argsNE) - .Result - with - | Ok v -> Ok(dvalToWire (Ply.toTask (materializeBlobs v)).Result) - | Error(_, e) -> Error(string e) + let task = + LibExecution.Execution.executeFunction + exeState (FQFnName.fqPackage hash) [] argsNE + if task.Wait(timeoutMs) then + match task.Result with + // Materialize PERSISTENT blobs before wiring: dvalToWire is + // pure and only encodes Ephemeral, so a package blob in the + // result printed "?unmarshalable:DBlob" and read as a false + // DIFF (the compiled side was right). + | Ok v -> Ok(dvalToWire (Ply.toTask (materializeBlobs v)).Result) + | Error(_, e) -> Error(string e) + else Error("__timeout__") with e -> Error("exn: " + e.Message) + let interp = runInterp () + // A SECOND run: a fn that disagrees with itself (uuidGenerate, random, + // clock) can't be compared and would otherwise be a false DIFF. + let interp2 = runInterp () match interp, interp2 with + | Error "__timeout__", _ | _, Error "__timeout__" -> return "itimeout" | Error e, _ -> return "ierr|" + e | Ok i, Ok i2 when i <> i2 -> return "nondet" | Ok i, _ -> From dfa785b9229ed5f3734224f0c4e80382ff3f08a3 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 12:40:22 -0400 Subject: [PATCH 166/172] compiler: run the interpreter's double-check BEFORE the compiled binary (task #24) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit equivOne ran the compiled binary first, then the interpreter twice for the nondet check. For a STATE-MUTATING fn that order defeats the check: Posix.symlink run by the binary creates the link, then both interpreter passes see the post-state (EEXIST) and AGREE, so nondet misses it and the harness reports a false DIFF (c=Ok vs i=Error 17 "File exists"). Same for Posix.unlink (ENOENT). Fix: run the two interpreter passes first, decide nondet, and only then run the binary. symlink now gives Ok then EEXIST across the two interpreter runs -> they DISAGREE -> `nondet` -> honestly skipped, and the binary never runs to muddy the filesystem. A pure fn's two runs still agree, so the provable set is unaffected. Verified: Posix.symlink and Posix.unlink now report `nondet` (were false DIFF); pure fns (JSON) still `match`. Harness-only change, so compile coverage is unaffected by construction — SAMPLE=400 gate confirms 0 regressions. The one DIFF in the 40-fn differential (SemanticTokensOptionsRange.toJson, c=Object vs i=Bool) is PRE-EXISTING — it reproduces with this change stashed at HEAD, so the reorder introduced it neither. That one is a separate real finding, investigated next. --- .../Builtins.Compiler/Libs/Compiler.fs | 109 ++++++++++-------- 1 file changed, 58 insertions(+), 51 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index b42caea3f3..466092d33c 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -1456,57 +1456,64 @@ let private equivOne match compileClosure typeDefs (fds @ extraMarshallers) marshalled with | Error e -> return "cf|compile: " + e | Ok binary -> - let (daemon, shutdown) = startDaemon exeState vm - let out = CompilerLibrary.execute 0 timeoutMs binary - shutdown () - let _ = (try daemon.Wait() with _ -> ()) - if out.ExitCode <> 0 then - return $"crash|{out.ExitCode}" - else - // Strip exactly ONE trailing newline -- the one Print appends -- - // not all of them. TrimEnd('\n') ate newlines belonging to the - // VALUE and reported two false DIFFs (`/// hello` vs - // `/// hello\n`) on strings that legitimately end in one. - let raw = out.Stdout - let compiled = - if raw.EndsWith "\n" then raw.Substring(0, raw.Length - 1) else raw - // Run the interpreter with the SAME bound the compiled binary got. - // Previously this was a bare `.Result` — UNBOUNDED — so the per-fn - // timeout only ever fenced the compiled side. An exponential fn - // (fib 35 interpreted) ran for minutes here, TWICE (the nondet - // check), defeating the whole per-fn budget: this was the "79 - // interpreter timeouts" that stalled the proof sweeps. Task.Wait(ms) - // gives a real deadline; a miss is reported as `itimeout`, distinct - // from a genuine interpreter error (`ierr`), so it's an honest - // "couldn't prove in time", not a false DIFF and not a crash. - let runInterp () : Result = - try - let argsNE = - match args with - | [] -> NEList.singleton DUnit - | _ -> NEList.ofList args.Head args.Tail - let task = - LibExecution.Execution.executeFunction - exeState (FQFnName.fqPackage hash) [] argsNE - if task.Wait(timeoutMs) then - match task.Result with - // Materialize PERSISTENT blobs before wiring: dvalToWire is - // pure and only encodes Ephemeral, so a package blob in the - // result printed "?unmarshalable:DBlob" and read as a false - // DIFF (the compiled side was right). - | Ok v -> Ok(dvalToWire (Ply.toTask (materializeBlobs v)).Result) - | Error(_, e) -> Error(string e) - else Error("__timeout__") - with e -> Error("exn: " + e.Message) - let interp = runInterp () - // A SECOND run: a fn that disagrees with itself (uuidGenerate, random, - // clock) can't be compared and would otherwise be a false DIFF. - let interp2 = runInterp () - match interp, interp2 with - | Error "__timeout__", _ | _, Error "__timeout__" -> return "itimeout" - | Error e, _ -> return "ierr|" + e - | Ok i, Ok i2 when i <> i2 -> return "nondet" - | Ok i, _ -> + // Run the interpreter with the SAME bound the compiled binary got. + // Previously this was a bare `.Result` — UNBOUNDED — so the per-fn + // timeout only ever fenced the compiled side. An exponential fn + // (fib 35 interpreted) ran for minutes here, TWICE (the nondet + // check), defeating the whole per-fn budget: this was the "79 + // interpreter timeouts" that stalled the proof sweeps. Task.Wait(ms) + // gives a real deadline; a miss is reported as `itimeout`, distinct + // from a genuine interpreter error (`ierr`), so it's an honest + // "couldn't prove in time", not a false DIFF and not a crash. + let runInterp () : Result = + try + let argsNE = + match args with + | [] -> NEList.singleton DUnit + | _ -> NEList.ofList args.Head args.Tail + let task = + LibExecution.Execution.executeFunction + exeState (FQFnName.fqPackage hash) [] argsNE + if task.Wait(timeoutMs) then + match task.Result with + // Materialize PERSISTENT blobs before wiring: dvalToWire is + // pure and only encodes Ephemeral, so a package blob in the + // result printed "?unmarshalable:DBlob" and read as a false + // DIFF (the compiled side was right). + | Ok v -> Ok(dvalToWire (Ply.toTask (materializeBlobs v)).Result) + | Error(_, e) -> Error(string e) + else Error("__timeout__") + with e -> Error("exn: " + e.Message) + // Run the interpreter TWICE **before** executing the compiled binary. + // For a STATE-MUTATING fn the order is load-bearing: Posix.symlink run + // by the binary FIRST creates the link, then both interpreter runs see + // the post-state (EEXIST) and AGREE, so the nondet check misses it and + // it's reported as a false DIFF (c=Ok vs i=Error 17). Running the two + // interpreter passes first, symlink gives Ok then EEXIST — they DISAGREE + // -> `nondet` -> honestly skipped, and the binary never runs to muddy the + // filesystem. (A pure fn's two runs still agree, so nothing changes for + // the provable set.) + let interp = runInterp () + let interp2 = runInterp () + match interp, interp2 with + | Error "__timeout__", _ | _, Error "__timeout__" -> return "itimeout" + | Error e, _ -> return "ierr|" + e + | Ok i, Ok i2 when i <> i2 -> return "nondet" + | Ok i, _ -> + let (daemon, shutdown) = startDaemon exeState vm + let out = CompilerLibrary.execute 0 timeoutMs binary + shutdown () + let _ = (try daemon.Wait() with _ -> ()) + if out.ExitCode <> 0 then + return $"crash|{out.ExitCode}" + else + // Strip exactly ONE trailing newline -- the one Print appends -- + // not all of them. TrimEnd('\n') ate newlines belonging to the + // VALUE and reported two false DIFFs (`/// hello` vs `/// hello\n`) + // on strings that legitimately end in one. + let raw = out.Stdout + let compiled = + if raw.EndsWith "\n" then raw.Substring(0, raw.Length - 1) else raw if compiled = i then return "match" else let esc (s : string) = s.Replace("\n", "\\n") From 96eee54dd39e13592303d1b8bd7cadd0074fa07d Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Fri, 17 Jul 2026 13:08:04 -0400 Subject: [PATCH 167/172] =?UTF-8?q?compiler:=20fix=20variant-tag=20miscomp?= =?UTF-8?q?ile=20=E2=80=94=20scope=20constructor=20+=20match=20tag=20looku?= =?UTF-8?q?ps=20by=20type?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit FIRST confirmed miscompile of the branch (task #28), a silent wrong-answer: SemanticTokensOptionsRange.toJson given `Bool true` returned `Json.Object []` compiled vs `Json.Bool true` interpreted — it took the EmptyObject match arm. `Bool` is the variant name, and it collides with the native Bool type and Json.Bool. Root cause: TWO sites resolved a variant to its TAG with a bare `Map.tryFind variantName variantLookup`, which returns whichever type won the name collision — and that type's tag index: - CONSTRUCTION (2_AST_to_ANF ~8163): `AST.Constructor (_, variantName, _)` DISCARDED the AST's own type name and looked up bare, so `SemanticTokensOptionsRange.Bool` was built with Json.Bool's tag. - MATCH tag-compare (~5822, buildPatternComparison): emitted `tag == N` with N from the bare lookup, so the arm's tag constant was wrong too. Both now use `TypeChecking.tryFindVariant` scoped by the constructor's / scrutinee's type name (falls back to bare when unscoped). This is the same family as the earlier scoped-key fix (02ba43ab9) which covered other readers but missed these two. This is exactly why the mandate is "compile coverage is NOT correctness": the miscompile was always there; only a good-enough proof harness (bounded interpreter #15, reordered nondet #24) could surface it. Verified: full known-good gate, 1946/1946 measured, 0 compile regressions (this is a hot path — every enum construction and match). 20-fn differential: 0 DIFF (no wrong answers introduced). HONEST FOLLOW-UP: the repro fn now returns `crash|1` instead of the wrong answer — the silent miscompile is eliminated (a loud crash beats a wrong result), but once the tag is correct the fn hits a SEPARATE failure (suspect the task #26 tuple bug in its Json.Object arm, or Json.Bool result marshalling). Kept task #28 open for that; it's no longer a silent-corruption bug. --- .../src/LibCompiler/passes/2_AST_to_ANF.fs | 27 ++++++++++++++++--- 1 file changed, 24 insertions(+), 3 deletions(-) diff --git a/backend/src/LibCompiler/passes/2_AST_to_ANF.fs b/backend/src/LibCompiler/passes/2_AST_to_ANF.fs index 9e1c6e7238..c70726fab7 100644 --- a/backend/src/LibCompiler/passes/2_AST_to_ANF.fs +++ b/backend/src/LibCompiler/passes/2_AST_to_ANF.fs @@ -5819,7 +5819,20 @@ let rec toANF (expr: AST.Expr) (varGen: ANF.VarGen) (env: VarEnv) (typeReg: Type let cmpExpr = ANF.Prim (ANF.Eq, scrutAtom, ANF.FloatLiteral f) Ok (Some (ANF.Var cmpVar, [(cmpVar, cmpExpr)], vg1)) | AST.PConstructor (variantName, payloadPattern) -> - match Map.tryFind variantName variantLookup with + // Resolve the variant SCOPED by the scrutinee's type. A bare + // `Map.tryFind variantName variantLookup` picks whichever type won the + // collision when two enums share a variant name — and it returns that + // type's TAG INDEX, so the emitted `tag == N` check compares against the + // wrong constant and the match takes the wrong arm. Confirmed miscompile + // (task #28): SemanticTokensOptionsRange.toJson given `Bool true` took the + // EmptyObject arm because "Bool" resolved to Json.Bool's tag. The earlier + // scoped-key fix (02ba43ab9) covered other readers but not this + // tag-comparison site. + let scrutTypeName = + match scrutType with + | AST.TSum(n, _) | AST.TRecord(n, _) -> Some n + | _ -> None + match TypeChecking.tryFindVariant variantLookup scrutTypeName variantName with | Some (_, _, tag, variantPayloadType) -> let arityMismatch = match payloadPattern, variantPayloadType with @@ -8147,8 +8160,16 @@ and toAtom (expr: AST.Expr) (varGen: ANF.VarGen) (env: VarEnv) (typeReg: TypeReg | _ -> Error $"Cannot access field '{fieldName}' on non-record type") - | AST.Constructor (_, variantName, payload) -> - match Map.tryFind variantName variantLookup with + | AST.Constructor (astTypeName, variantName, payload) -> + // Resolve SCOPED by the constructor's own type name. This discarded the AST type + // name (`_`) and did a bare `Map.tryFind variantName variantLookup`, which returns + // whichever type won the collision when two enums share a variant name — and with + // it, THAT type's TAG. So constructing SemanticTokensOptionsRange.Bool stored + // Json.Bool's tag, and a (correct) later match took the wrong arm. The construction + // half of task #28's miscompile; the match-side tag comparison had the same bare- + // lookup bug (fixed separately above). + let scopedTypeName = if astTypeName = "" then None else Some astTypeName + match TypeChecking.tryFindVariant variantLookup scopedTypeName variantName with | None -> Error $"Unknown constructor: {variantName}" | Some (typeName, _, tag, _) -> From 77b02a29c2b017611465956760d899fd7ba37222 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Sat, 18 Jul 2026 11:57:43 -0400 Subject: [PATCH 168/172] =?UTF-8?q?compiler:=20fix=20#26=20SIGSEGV=20?= =?UTF-8?q?=E2=80=94=20HeapStore=20of=20a=20string=20literal=20clobbered?= =?UTF-8?q?=20RCX?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The branch's one hard codegen bug. `HeapStore(addr, offset, StringSymbol)` builds the heap string inline using RCX as its length/byte/refcount temp, but RCX is X3 — an allocatable caller-saved register. The else-branch never saved it, and the addrReg=scratch sub-case silently popped the address into RCX, destroying whatever live value was there. Tuples store fields in ascending offset order, so `("a", Some 1)` stored the string at offset 0 first (clobbering RCX), then stored the Some-pointer at offset 8 from the now-garbage RCX -> a garbage heap pointer that SIGSEGVs when later dereferenced. That is exactly the tuple-second-element crash: it needed a string first (real inline build touches RCX), a heap-pointer second (only a corrupted pointer faults; a corrupted int doesn't), and enough register pressure (2+ list elements) to land that pointer in RCX. The truth table it now satisfies, all seam-free: (String, Option) 2nd -> 3 (was exit 139) (String, nested-tup) 2nd -> 3 (was exit 139) (String, String) 2nd -> xy (offset-8 is also a literal, never regressed) (Option, Option) 2nd -> 17 (no string store to clobber RCX) (Int64, Option) 2nd -> 3 (int at offset 0 is an Imm store, safe) Fix: preserve RCX across all three address cases (in-RCX, in-scratch, other). Mirrors the discipline the RawSet/RawGet paths already follow. Not a register-allocation bug — the prior "documented-Open upstream" attribution was wrong. Post-regalloc LIR of the crash and working variants is byte-identical but for the field offset; the corruption is in HeapStore lowering, upstream of allocation. No allocator or finger-tree change needed. Verify: #26 repro crash -> correct on 5 tuple shapes; fastcheck 390/390, 0 compile regressions; differential proof sweep over a 487-fn known-good sample — the only DIFF + crash are pre-existing (identical on the stashed pre-fix binary), so 0 new miscompiles. Claude-Session: https://claude.ai/code/session_015dcGWPp734R2y8UP3Qtva1 --- .../src/LibCompiler/passes/x64/6_CodeGen.fs | 33 +++++++++++++++---- 1 file changed, 26 insertions(+), 7 deletions(-) diff --git a/backend/src/LibCompiler/passes/x64/6_CodeGen.fs b/backend/src/LibCompiler/passes/x64/6_CodeGen.fs index 66dd3bd644..9675e61d05 100644 --- a/backend/src/LibCompiler/passes/x64/6_CodeGen.fs +++ b/backend/src/LibCompiler/passes/x64/6_CodeGen.fs @@ -1667,17 +1667,36 @@ let private translateInstr (ctx: FuncCtx) (instr: LIR.Instr) : Result SIGSEGV. + // (This was bug #26: `("a", Some 1)` stored the string at offset 0 first, + // clobbering RCX, then stored the Some-pointer at offset 8 from the now-garbage RCX.) + if addrReg = X86_64.RCX then + // Address lives in RCX; its live value IS the target address. + // Save it, rebuild (clobbering RCX), restore it as the address, store. + Ok ([X86_64.PUSH X86_64.RCX] @ alloc @ storeLen @ copyBytes @ storeRC @ [X86_64.POP X86_64.RCX X86_64.MOV_store (X86_64.RCX, int32 offset, scratch)]) + elif addrReg = scratch then + // Address lives in R11, clobbered by alloc. Save the (possibly live) RCX + // AND the address; rebuild; borrow RCX to hold the address for the store; + // then restore RCX's live value. + Ok ([X86_64.PUSH X86_64.RCX; X86_64.PUSH scratch] + @ alloc @ storeLen @ copyBytes @ storeRC + @ [X86_64.POP X86_64.RCX + X86_64.MOV_store (X86_64.RCX, int32 offset, scratch) + X86_64.POP X86_64.RCX]) else - // Store the string pointer into the record field - Ok (alloc @ storeLen @ copyBytes @ storeRC - @ [X86_64.MOV_store (addrReg, int32 offset, scratch)]) + // Address is in some other register (untouched by the build). + // Preserve RCX around the string construction. + Ok ([X86_64.PUSH X86_64.RCX] + @ alloc @ storeLen @ copyBytes @ storeRC + @ [X86_64.MOV_store (addrReg, int32 offset, scratch) + X86_64.POP X86_64.RCX]) | LIR.StackSlot stackOffset -> let adjOff = adjustStackOffset ctx stackOffset if addrReg = scratch then From 513b488a5b970cafe00ebb620ac5dd20ab0094a2 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Sat, 18 Jul 2026 12:29:51 -0400 Subject: [PATCH 169/172] compiler: unsigned integer comparison + division/modulo (#22) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Integer comparisons and division ignored operand signedness: MIR->LIR emitted signed condition codes (setl/setg via LIR.LT/GT/LE/GE) and signed IDIV (Sdiv) for every integer type, so UInt* operands >= 2^63 compared as negative and unsigned division ran IDIV. Symptom in the wild: UInt64.toString emitted a bare "?" for large values (the digit-extraction loop compares against 10 and read the value as negative). The signedness (operandType: AST.Type) was already in scope at the lowering sites. Fix: - LIR: add unsigned conditions ULT/UGT/ULE/UGE and a Udiv instruction. - 4_MIR_to_LIR: select unsigned condition / Udiv / unsigned-modulo (Udiv+Msub, no toward-negative-infinity sign fixup) when isUnsignedIntType operandType. - x64/6_CodeGen: ULT/UGT/ULE/UGE -> setb/seta/setbe/setae (Cset) and b/a/be/ae (CondBranch); Udiv mirrors Sdiv but zero-extends via `xor rdx,rdx` instead of CQO, uses DIV not IDIV, and drops the INT64_MIN/-1 overflow guard. - 5_RegisterAllocation: Udiv threaded through getUsedVRegs / getDefinedVReg / spill-reload (the first two have a catch-all that would silently miscompile a missed div, so this is load-bearing, not cosmetic). - Peephole (LICM purity) + IRPrinter: Udiv parity with Sdiv. - arm64/6_CodeGen: Udiv wired to ARM64 UDIV; unsigned conditions map to signed as a stopgap (ARM64.Condition has no LO/HI/LS/HS) — ARM64 is not the compiled/tested backend, marked TODO(#22). x64 is correct. Verified: UInt64 >/=/<= and //% on typed variables now match the interpreter across the 2^63 boundary; signed Int compare/div/mod unchanged (spot-checked both directions + euclidean mod); the previously-DIFFing UInt64 fn 5afb269d now matches; differential over 194 known-good fns still 194/194, 0 DIFF. Known residual (separate, narrow): a UInt64 *literal* compared against another literal is constant-folded at compile time (2.3_ANF_Optimize) using signed F# ops, and the compiler-dialect literal path tags large UL literals as Int64. This only bites literal-vs-literal folding (typed variables are correct); left as a follow-up since it's an upstream literal-typing issue, not the LIR lowering. Claude-Session: https://claude.ai/code/session_015dcGWPp734R2y8UP3Qtva1 --- backend/src/LibCompiler/IRPrinter.fs | 2 + backend/src/LibCompiler/LIR.fs | 6 ++ .../LibCompiler/passes/4.5_LIR_Peephole.fs | 1 + .../src/LibCompiler/passes/4_MIR_to_LIR.fs | 71 ++++++++++++------- .../passes/5_RegisterAllocation.fs | 14 +++- .../src/LibCompiler/passes/arm64/6_CodeGen.fs | 20 ++++++ .../src/LibCompiler/passes/x64/6_CodeGen.fs | 46 ++++++++++-- 7 files changed, 128 insertions(+), 32 deletions(-) diff --git a/backend/src/LibCompiler/IRPrinter.fs b/backend/src/LibCompiler/IRPrinter.fs index acffb3f1a7..8fd37ba7f8 100644 --- a/backend/src/LibCompiler/IRPrinter.fs +++ b/backend/src/LibCompiler/IRPrinter.fs @@ -454,6 +454,8 @@ let private prettyPrintLIRInstr (instr: LIR.Instr) : string = $"{prettyPrintLIRReg dest} <- Mul({prettyPrintLIRReg left}, Reg {prettyPrintLIRReg right})" | LIR.Sdiv (dest, left, right) -> $"{prettyPrintLIRReg dest} <- Sdiv({prettyPrintLIRReg left}, Reg {prettyPrintLIRReg right})" + | LIR.Udiv (dest, left, right) -> + $"{prettyPrintLIRReg dest} <- Udiv({prettyPrintLIRReg left}, Reg {prettyPrintLIRReg right})" | LIR.Msub (dest, mulLeft, mulRight, sub) -> $"{prettyPrintLIRReg dest} <- Msub({prettyPrintLIRReg mulLeft}, {prettyPrintLIRReg mulRight}, {prettyPrintLIRReg sub})" | LIR.Madd (dest, mulLeft, mulRight, add) -> diff --git a/backend/src/LibCompiler/LIR.fs b/backend/src/LibCompiler/LIR.fs index 7963ea5eb2..4674150ff8 100644 --- a/backend/src/LibCompiler/LIR.fs +++ b/backend/src/LibCompiler/LIR.fs @@ -52,6 +52,11 @@ type Condition = | GT | LE | GE + // Unsigned ordered comparisons (for UInt* operands). x64: setb/seta/setbe/setae. + | ULT + | UGT + | ULE + | UGE /// Reference-count operation kind type RcKind = @@ -70,6 +75,7 @@ type Instr = | Sub of dest:Reg * left:Reg * right:Operand | Mul of dest:Reg * left:Reg * right:Reg | Sdiv of dest:Reg * left:Reg * right:Reg + | Udiv of dest:Reg * left:Reg * right:Reg | Msub of dest:Reg * mulLeft:Reg * mulRight:Reg * sub:Reg | Madd of dest:Reg * mulLeft:Reg * mulRight:Reg * add:Reg | Cmp of left:Reg * right:Operand diff --git a/backend/src/LibCompiler/passes/4.5_LIR_Peephole.fs b/backend/src/LibCompiler/passes/4.5_LIR_Peephole.fs index 05624467f0..f948d74ba0 100644 --- a/backend/src/LibCompiler/passes/4.5_LIR_Peephole.fs +++ b/backend/src/LibCompiler/passes/4.5_LIR_Peephole.fs @@ -218,6 +218,7 @@ let isPureLoopInstr (instr: Instr) : bool = | Sub _ | Mul _ | Sdiv _ + | Udiv _ | Msub _ | Madd _ | Cmp _ diff --git a/backend/src/LibCompiler/passes/4_MIR_to_LIR.fs b/backend/src/LibCompiler/passes/4_MIR_to_LIR.fs index d2b3f41f38..b6bcb2b87d 100644 --- a/backend/src/LibCompiler/passes/4_MIR_to_LIR.fs +++ b/backend/src/LibCompiler/passes/4_MIR_to_LIR.fs @@ -128,6 +128,12 @@ let shouldCheckNegativeDivisor (operandType: AST.Type) : bool = | AST.TInt8 | AST.TInt16 | AST.TInt32 | AST.TInt64 -> true | _ -> false +/// UInt* operands need unsigned comparison/division (setb/seta vs setl/setg, DIV vs IDIV). +let isUnsignedIntType (operandType: AST.Type) : bool = + match operandType with + | AST.TUInt8 | AST.TUInt16 | AST.TUInt32 | AST.TUInt64 | AST.TUInt128 -> true + | _ -> false + let buildIntegerModuloParts (destReg: LIR.Reg) (left: MIR.Operand) @@ -142,25 +148,34 @@ let buildIntegerModuloParts | Error err -> Error err | Ok (rightInstrs, rightReg, stateAfterRight) -> let (quotReg, stateAfterQuot) = freshTempReg stateAfterRight - let (xorReg, stateAfterXor) = freshTempReg stateAfterQuot - let (remNonZeroReg, stateAfterRemNonZero) = freshTempReg stateAfterXor - let (signMismatchReg, stateAfterSignMismatch) = freshTempReg stateAfterRemNonZero - let (adjustFlagReg, stateAfterAdjustFlag) = freshTempReg stateAfterSignMismatch - let (adjustReg, nextState) = freshTempReg stateAfterAdjustFlag let truncInstrs = truncateForType destReg operandType - let modInstrs = - [LIR.Sdiv (quotReg, leftReg, rightReg); - LIR.Msub (destReg, quotReg, rightReg, leftReg); - LIR.Cmp (destReg, LIR.Imm 0L); - LIR.Cset (remNonZeroReg, LIR.NE); - LIR.Eor (xorReg, destReg, rightReg); - LIR.Cmp (xorReg, LIR.Imm 0L); - LIR.Cset (signMismatchReg, LIR.LT); - LIR.And (adjustFlagReg, remNonZeroReg, signMismatchReg); - LIR.Mul (adjustReg, adjustFlagReg, rightReg); - LIR.Add (destReg, destReg, LIR.Reg adjustReg)] - @ truncInstrs - Ok (leftInstrs @ rightInstrs, rightReg, modInstrs, nextState) + if isUnsignedIntType operandType then + // Unsigned modulo: quotient*divisor subtracted from dividend. No sign + // adjustment — the toward-negative-infinity fixup below is signed-only. + let modInstrs = + [LIR.Udiv (quotReg, leftReg, rightReg); + LIR.Msub (destReg, quotReg, rightReg, leftReg)] + @ truncInstrs + Ok (leftInstrs @ rightInstrs, rightReg, modInstrs, stateAfterQuot) + else + let (xorReg, stateAfterXor) = freshTempReg stateAfterQuot + let (remNonZeroReg, stateAfterRemNonZero) = freshTempReg stateAfterXor + let (signMismatchReg, stateAfterSignMismatch) = freshTempReg stateAfterRemNonZero + let (adjustFlagReg, stateAfterAdjustFlag) = freshTempReg stateAfterSignMismatch + let (adjustReg, nextState) = freshTempReg stateAfterAdjustFlag + let modInstrs = + [LIR.Sdiv (quotReg, leftReg, rightReg); + LIR.Msub (destReg, quotReg, rightReg, leftReg); + LIR.Cmp (destReg, LIR.Imm 0L); + LIR.Cset (remNonZeroReg, LIR.NE); + LIR.Eor (xorReg, destReg, rightReg); + LIR.Cmp (xorReg, LIR.Imm 0L); + LIR.Cset (signMismatchReg, LIR.LT); + LIR.And (adjustFlagReg, remNonZeroReg, signMismatchReg); + LIR.Mul (adjustReg, adjustFlagReg, rightReg); + LIR.Add (destReg, destReg, LIR.Reg adjustReg)] + @ truncInstrs + Ok (leftInstrs @ rightInstrs, rightReg, modInstrs, nextState) let buildFloatArgMoves (floatArgs: MIR.Operand list) @@ -360,14 +375,18 @@ let selectInstr Ok (leftInstrs @ rightInstrs @ [LIR.Mul (lirDest, leftReg, rightReg)] @ truncInstrs, nextState) | MIR.Div -> - // SDIV requires both operands in registers + // SDIV/UDIV requires both operands in registers match ensureInRegister left state with | Error err -> Error err | Ok (leftInstrs, leftReg, stateAfterLeft) -> match ensureInRegister right stateAfterLeft with | Error err -> Error err | Ok (rightInstrs, rightReg, nextState) -> - Ok (leftInstrs @ rightInstrs @ [LIR.Sdiv (lirDest, leftReg, rightReg)] @ truncInstrs, nextState) + let divInstr = + if isUnsignedIntType operandType + then LIR.Udiv (lirDest, leftReg, rightReg) + else LIR.Sdiv (lirDest, leftReg, rightReg) + Ok (leftInstrs @ rightInstrs @ [divInstr] @ truncInstrs, nextState) | MIR.Mod -> buildIntegerModuloParts lirDest left right operandType state @@ -391,25 +410,29 @@ let selectInstr match ensureInRegister left state with | Error err -> Error err | Ok (leftInstrs, leftReg, nextState) -> - Ok (leftInstrs @ [LIR.Cmp (leftReg, rightOp); LIR.Cset (lirDest, LIR.LT)], nextState) + let cond = if isUnsignedIntType operandType then LIR.ULT else LIR.LT + Ok (leftInstrs @ [LIR.Cmp (leftReg, rightOp); LIR.Cset (lirDest, cond)], nextState) | MIR.Gt -> match ensureInRegister left state with | Error err -> Error err | Ok (leftInstrs, leftReg, nextState) -> - Ok (leftInstrs @ [LIR.Cmp (leftReg, rightOp); LIR.Cset (lirDest, LIR.GT)], nextState) + let cond = if isUnsignedIntType operandType then LIR.UGT else LIR.GT + Ok (leftInstrs @ [LIR.Cmp (leftReg, rightOp); LIR.Cset (lirDest, cond)], nextState) | MIR.Lte -> match ensureInRegister left state with | Error err -> Error err | Ok (leftInstrs, leftReg, nextState) -> - Ok (leftInstrs @ [LIR.Cmp (leftReg, rightOp); LIR.Cset (lirDest, LIR.LE)], nextState) + let cond = if isUnsignedIntType operandType then LIR.ULE else LIR.LE + Ok (leftInstrs @ [LIR.Cmp (leftReg, rightOp); LIR.Cset (lirDest, cond)], nextState) | MIR.Gte -> match ensureInRegister left state with | Error err -> Error err | Ok (leftInstrs, leftReg, nextState) -> - Ok (leftInstrs @ [LIR.Cmp (leftReg, rightOp); LIR.Cset (lirDest, LIR.GE)], nextState) + let cond = if isUnsignedIntType operandType then LIR.UGE else LIR.GE + Ok (leftInstrs @ [LIR.Cmp (leftReg, rightOp); LIR.Cset (lirDest, cond)], nextState) // Boolean operations (bitwise for 0/1 values) | MIR.And -> diff --git a/backend/src/LibCompiler/passes/5_RegisterAllocation.fs b/backend/src/LibCompiler/passes/5_RegisterAllocation.fs index 344d9ad404..9265c82120 100644 --- a/backend/src/LibCompiler/passes/5_RegisterAllocation.fs +++ b/backend/src/LibCompiler/passes/5_RegisterAllocation.fs @@ -381,7 +381,7 @@ let getUsedVRegs (instr: LIR.Instr) : int list = regToVReg src |> Option.toList | LIR.Add (_, left, right) | LIR.Sub (_, left, right) -> (regToVReg left |> Option.toList) @ (operandToVReg right |> Option.toList) - | LIR.Mul (_, left, right) | LIR.Sdiv (_, left, right) + | LIR.Mul (_, left, right) | LIR.Sdiv (_, left, right) | LIR.Udiv (_, left, right) | LIR.And (_, left, right) | LIR.Orr (_, left, right) | LIR.Eor (_, left, right) | LIR.Lsl (_, left, right) | LIR.Lsr (_, left, right) -> (regToVReg left |> Option.toList) @ (regToVReg right |> Option.toList) @@ -518,7 +518,7 @@ let getDefinedVReg (instr: LIR.Instr) : int option = match instr with | LIR.Mov (dest, _) -> regToVReg dest | LIR.Add (dest, _, _) | LIR.Sub (dest, _, _) -> regToVReg dest - | LIR.Mul (dest, _, _) | LIR.Sdiv (dest, _, _) | LIR.Msub (dest, _, _, _) | LIR.Madd (dest, _, _, _) -> regToVReg dest + | LIR.Mul (dest, _, _) | LIR.Sdiv (dest, _, _) | LIR.Udiv (dest, _, _) | LIR.Msub (dest, _, _, _) | LIR.Madd (dest, _, _, _) -> regToVReg dest | LIR.Cset (dest, _) -> regToVReg dest | LIR.And (dest, _, _) | LIR.And_imm (dest, _, _) | LIR.Orr (dest, _, _) | LIR.Eor (dest, _, _) | LIR.Lsl (dest, _, _) | LIR.Lsr (dest, _, _) | LIR.Lsl_imm (dest, _, _) | LIR.Lsr_imm (dest, _, _) -> regToVReg dest @@ -2246,6 +2246,16 @@ let applyToInstr (arch: Platform.Arch) (mapping: AllocationResult) (instr: LIR.I | _ -> [] leftLoads @ rightLoads @ [divInstr] @ storeInstrs + | LIR.Udiv (dest, left, right) -> + let (destReg, destAlloc) = applyToReg mapping dest + let ((leftReg, leftLoads), (rightReg, rightLoads)) = loadSpilledPair arch mapping left right destReg + let divInstr = LIR.Udiv (destReg, leftReg, rightReg) + let storeInstrs = + match destAlloc with + | Some (StackSlot offset) -> [LIR.Store (offset, LIR.Physical LIR.X11)] + | _ -> [] + leftLoads @ rightLoads @ [divInstr] @ storeInstrs + | LIR.Msub (dest, mulLeft, mulRight, sub) -> let (destReg, destAlloc) = applyToReg mapping dest if isX86_64 arch then diff --git a/backend/src/LibCompiler/passes/arm64/6_CodeGen.fs b/backend/src/LibCompiler/passes/arm64/6_CodeGen.fs index 0ec47d2e63..607092dfef 100644 --- a/backend/src/LibCompiler/passes/arm64/6_CodeGen.fs +++ b/backend/src/LibCompiler/passes/arm64/6_CodeGen.fs @@ -1170,6 +1170,14 @@ let convertInstr (ctx: CodeGenContext) (instr: LIR.Instr) : Result Result.map (fun rightReg -> [ARM64Symbolic.SDIV (destReg, leftReg, rightReg)]))) + | LIR.Udiv (dest, left, right) -> + lirRegToARM64Reg dest + |> Result.bind (fun destReg -> + lirRegToARM64Reg left + |> Result.bind (fun leftReg -> + lirRegToARM64Reg right + |> Result.map (fun rightReg -> [ARM64Symbolic.UDIV (destReg, leftReg, rightReg)]))) + | LIR.Msub (dest, mulLeft, mulRight, sub) -> // MSUB: dest = sub - mulLeft * mulRight lirRegToARM64Reg dest @@ -1231,6 +1239,13 @@ let convertInstr (ctx: CodeGenContext) (instr: LIR.Instr) : Result ARM64Symbolic.GT | LIR.LE -> ARM64Symbolic.LE | LIR.GE -> ARM64Symbolic.GE + // TODO(#22): ARM64.Condition has no unsigned codes (needs LO/HI/LS/HS). + // ARM64 is not the compiled/tested backend; map to signed to stay building. + // This is knowingly wrong for UInt* on ARM64 only — x64 is correct. + | LIR.ULT -> ARM64Symbolic.LT + | LIR.UGT -> ARM64Symbolic.GT + | LIR.ULE -> ARM64Symbolic.LE + | LIR.UGE -> ARM64Symbolic.GE [ARM64Symbolic.CSET (destReg, arm64Cond)]) | LIR.And (dest, left, right) -> @@ -3465,6 +3480,11 @@ let convertTerminator (epilogueLabel: string) (terminator: LIR.Terminator) : Res | LIR.GT -> ARM64Symbolic.GT | LIR.LE -> ARM64Symbolic.LE | LIR.GE -> ARM64Symbolic.GE + // TODO(#22): unsigned mapped to signed on the untested ARM64 backend (needs LO/HI/LS/HS). + | LIR.ULT -> ARM64Symbolic.LT + | LIR.UGT -> ARM64Symbolic.GT + | LIR.ULE -> ARM64Symbolic.LE + | LIR.UGE -> ARM64Symbolic.GE Ok [ ARM64Symbolic.B_cond_label (arm64Cond, trueLbl) // If condition, jump to true branch ARM64Symbolic.B_label falseLbl // Otherwise jump to false branch diff --git a/backend/src/LibCompiler/passes/x64/6_CodeGen.fs b/backend/src/LibCompiler/passes/x64/6_CodeGen.fs index 9675e61d05..d0b8cf3f8f 100644 --- a/backend/src/LibCompiler/passes/x64/6_CodeGen.fs +++ b/backend/src/LibCompiler/passes/x64/6_CodeGen.fs @@ -1080,6 +1080,34 @@ let private translateInstr (ctx: FuncCtx) (instr: LIR.Instr) : Result + // DIV: RDX:RAX / src → RAX=quotient, RDX=remainder. Unsigned, so zero-extend + // RAX into RDX via `xor rdx,rdx` (not CQO), and use DIV (not IDIV). No + // INT64_MIN/-1 overflow case for unsigned. Preserve RDX via the red zone, + // mirroring the Sdiv setup. + resolveReg dest + |> Result.bind (fun destReg -> + resolveReg left + |> Result.bind (fun leftReg -> + resolveReg right + |> Result.map (fun rightReg -> + let divisor = + if rightReg = X86_64.RAX || rightReg = X86_64.RDX then scratch + else rightReg + let saveDivisor = + if rightReg = X86_64.RAX || rightReg = X86_64.RDX then + [X86_64.MOV_reg (scratch, rightReg)] + else [] + let moveLeft = + if leftReg <> X86_64.RAX then [X86_64.MOV_reg (X86_64.RAX, leftReg)] + else [] + saveDivisor + @ moveLeft + @ [X86_64.MOV_store (X86_64.RSP, -8, X86_64.RDX)] + @ [X86_64.XOR_reg (X86_64.RDX, X86_64.RDX); X86_64.DIV divisor] + @ (if destReg <> X86_64.RAX then [X86_64.MOV_reg (destReg, X86_64.RAX)] else []) + @ [X86_64.MOV_load (X86_64.RDX, X86_64.RSP, -8)]))) + | LIR.Msub (dest, mulLeft, mulRight, sub) -> // dest = sub - mulLeft * mulRight // No fused instruction on x86_64: IMUL tmp, mulLeft, mulRight; MOV dest, sub; SUB dest, tmp @@ -1150,16 +1178,19 @@ let private translateInstr (ctx: FuncCtx) (instr: LIR.Instr) : Result [X86_64.SETcc (X86_64.B, destReg); X86_64.MOVZX_byte (destReg, destReg)] - | LIR.GT -> [X86_64.SETcc (X86_64.A, destReg); X86_64.MOVZX_byte (destReg, destReg)] - | LIR.LE -> [X86_64.SETcc (X86_64.BE, destReg); X86_64.MOVZX_byte (destReg, destReg)] - | LIR.GE -> [X86_64.SETcc (X86_64.AE, destReg); X86_64.MOVZX_byte (destReg, destReg)] + | LIR.LT | LIR.ULT -> [X86_64.SETcc (X86_64.B, destReg); X86_64.MOVZX_byte (destReg, destReg)] + | LIR.GT | LIR.UGT -> [X86_64.SETcc (X86_64.A, destReg); X86_64.MOVZX_byte (destReg, destReg)] + | LIR.LE | LIR.ULE -> [X86_64.SETcc (X86_64.BE, destReg); X86_64.MOVZX_byte (destReg, destReg)] + | LIR.GE | LIR.UGE -> [X86_64.SETcc (X86_64.AE, destReg); X86_64.MOVZX_byte (destReg, destReg)] else let x86Cond = match cond with | LIR.EQ -> X86_64.EQ | LIR.NE -> X86_64.NE | LIR.LT -> X86_64.LT | LIR.GT -> X86_64.GT | LIR.LE -> X86_64.LE | LIR.GE -> X86_64.GE + // Unsigned: below/above (setb/seta/setbe/setae). + | LIR.ULT -> X86_64.B | LIR.UGT -> X86_64.A + | LIR.ULE -> X86_64.BE | LIR.UGE -> X86_64.AE [X86_64.SETcc (x86Cond, destReg); X86_64.MOVZX_byte (destReg, destReg)]) | LIR.And (dest, left, right) -> @@ -2981,13 +3012,16 @@ let private translateTerminator (epilogueLabel: string) (term: LIR.Terminator) : if lastCompWasFloat then match cond with | LIR.EQ -> X86_64.EQ | LIR.NE -> X86_64.NE - | LIR.LT -> X86_64.B | LIR.GT -> X86_64.A - | LIR.LE -> X86_64.BE | LIR.GE -> X86_64.AE + | LIR.LT | LIR.ULT -> X86_64.B | LIR.GT | LIR.UGT -> X86_64.A + | LIR.LE | LIR.ULE -> X86_64.BE | LIR.GE | LIR.UGE -> X86_64.AE else match cond with | LIR.EQ -> X86_64.EQ | LIR.NE -> X86_64.NE | LIR.LT -> X86_64.LT | LIR.GT -> X86_64.GT | LIR.LE -> X86_64.LE | LIR.GE -> X86_64.GE + // Unsigned: below/above. + | LIR.ULT -> X86_64.B | LIR.UGT -> X86_64.A + | LIR.ULE -> X86_64.BE | LIR.UGE -> X86_64.AE Ok [X86_64.Jcc (x86Cond, trueLabel) X86_64.JMP falseLabel] | LIR.BranchBitZero (reg, bit, LIR.Label zeroLabel, LIR.Label nonZeroLabel) -> From 4b4f0e451859057b5b37551a22bb7f6b2bb07571 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Sat, 18 Jul 2026 13:17:28 -0400 Subject: [PATCH 170/172] =?UTF-8?q?compiler:=20fix=20float-arg=20miscompil?= =?UTF-8?q?e=20=E2=80=94=20x64=20FArgMoves=20ignored=20move=20cycles?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit A 2-arg float call whose arguments need a cyclic shuffle in the ABI registers computed the wrong result. The x64 FArgMoves lowering emitted the parallel moves naively in sequence, so a swap FArgMoves(D0<-D1, D1<-D0) became `movsd D0,D1; movsd D1,D0` — the second move reads the already-overwritten D0, so BOTH registers end up holding the old D1. `multiply(x, sqrt 4.0)` computed x*x; the shipping fn `turnsToRadians = Float.multiply(Math.tau, angleInTurns)` computed tau*tau (39.478) instead of tau*2.5 (15.708) — the differential DIFF 512efce2. ARM64 already resolved this correctly via ParallelMoves.resolve + a reserved temp (D16); x64 never did. Fix: lower x64 FArgMoves through the same ParallelMoves.resolve and break cycles through a reserved float scratch. XMM15 (D15) is removed from the allocatable/callee-saved set to serve as that scratch (analogous to the integer R11 and ARM64's D16). Cost: 15 allocatable XMMs instead of 16. Seam-free truth table, all now correct (were wrong): multiply (sqrt 9) (sqrt 4) -> 6 (was 9 = arg0^2) multiply x (sqrt 4) @x=2.5 -> 5 (was 6.25 = x^2) multiply (sqrt 4) x -> 5 (was already ok — no cycle) multiply x y (two params) -> 7.5 (ok) Verify: truth table correct; 512efce2 now matches the interpreter; differential over 194 known-good fns still 194/194, 0 DIFF. Claude-Session: https://claude.ai/code/session_015dcGWPp734R2y8UP3Qtva1 --- .../passes/5_RegisterAllocation.fs | 9 +++-- .../src/LibCompiler/passes/x64/6_CodeGen.fs | 33 +++++++++++++------ 2 files changed, 30 insertions(+), 12 deletions(-) diff --git a/backend/src/LibCompiler/passes/5_RegisterAllocation.fs b/backend/src/LibCompiler/passes/5_RegisterAllocation.fs index 9265c82120..35129c5f72 100644 --- a/backend/src/LibCompiler/passes/5_RegisterAllocation.fs +++ b/backend/src/LibCompiler/passes/5_RegisterAllocation.fs @@ -1855,9 +1855,14 @@ let floatCallerSavedRegs : LIR.PhysFPReg list = [ LIR.D0; LIR.D1; LIR.D2; LIR.D3; LIR.D4; LIR.D5; LIR.D6; LIR.D7 ] -/// Float callee-saved registers (D8-D15) +/// Float callee-saved registers (D8-D14). D15 (XMM15) is RESERVED as the float +/// scratch for breaking cycles in x64 FArgMoves parallel moves (analogous to the +/// integer R11 scratch, and to ARM64's D16). It must not be allocatable, or a cyclic +/// float-arg shuffle (e.g. swapping the two args of a 2-arg float call) corrupts a +/// live value. Keeping it out of this list removes it from allocatableFloatRegs and +/// from the callee-saved save/restore set. let floatCalleeSavedRegs : LIR.PhysFPReg list = [ - LIR.D8; LIR.D9; LIR.D10; LIR.D11; LIR.D12; LIR.D13; LIR.D14; LIR.D15 + LIR.D8; LIR.D9; LIR.D10; LIR.D11; LIR.D12; LIR.D13; LIR.D14 ] /// All allocatable float registers - caller-saved first, then callee-saved diff --git a/backend/src/LibCompiler/passes/x64/6_CodeGen.fs b/backend/src/LibCompiler/passes/x64/6_CodeGen.fs index d0b8cf3f8f..388c3ec092 100644 --- a/backend/src/LibCompiler/passes/x64/6_CodeGen.fs +++ b/backend/src/LibCompiler/passes/x64/6_CodeGen.fs @@ -1570,17 +1570,30 @@ let private translateInstr (ctx: FuncCtx) (instr: LIR.Instr) : Result Result.map (fun destReg -> [X86_64.LEA_rip (destReg, funcName)]) | LIR.FArgMoves moves -> - // Move float arguments into XMM registers - let instrs = - moves |> List.collect (fun (destPhys, srcFreg) -> - let destXmm = lirFRegToX86 destPhys + // Move float arguments into XMM registers. These are PARALLEL moves: a naive + // sequential lowering corrupts cyclic shuffles — e.g. swapping the two args of a + // 2-arg float call, FArgMoves(D0<-D1, D1<-D0), as `movsd D0,D1; movsd D1,D0` + // leaves BOTH = the old D1 (was bug #30: multiply(x, sqrt 4) computed x*x). + // Resolve the moves and break cycles through the reserved XMM15 scratch. + let resolved = + moves |> List.map (fun (destPhys, srcFreg) -> match srcFreg with - | LIR.FPhysical srcPhys -> - let srcXmm = lirFRegToX86 srcPhys - if destXmm = srcXmm then [] - else [X86_64.MOVSD_reg (destXmm, srcXmm)] - | LIR.FVirtual id -> Crash.crash $"Unresolved virtual float register f{id} in FArgMoves") - Ok instrs + | LIR.FPhysical srcPhys -> Ok (lirFRegToX86 destPhys, lirFRegToX86 srcPhys) + | LIR.FVirtual id -> Error $"Unresolved virtual float register f{id} in FArgMoves") + |> List.fold (fun acc r -> + match acc, r with + | Ok xs, Ok x -> Ok (x :: xs) + | Error e, _ -> Error e + | _, Error e -> Error e) (Ok []) + |> Result.map List.rev + resolved + |> Result.map (fun xmmMoves -> + let actions = ParallelMoves.resolve xmmMoves (fun (src: X86_64.FReg) -> Some src) + actions |> List.collect (fun action -> + match action with + | ParallelMoves.SaveToTemp src -> [X86_64.MOVSD_reg (X86_64.XMM15, src)] + | ParallelMoves.Move (dest, src) -> if dest = src then [] else [X86_64.MOVSD_reg (dest, src)] + | ParallelMoves.MoveFromTemp dest -> [X86_64.MOVSD_reg (dest, X86_64.XMM15)])) | LIR.Phi (dest, _, _) -> // Phi nodes should be eliminated before codegen (SSA destruction) From d153f92365293e2adf7fc8226f471f5d54933f2a Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Sat, 18 Jul 2026 13:48:50 -0400 Subject: [PATCH 171/172] compiler: route sized-int (Int8/16/32, UInt8/16/32/64) args through the seam MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit rtToMarshalable — the gate deciding whether a builtin is routable — had no case for the sized integer types, so any builtin taking an Int8/16/32 or UInt* arg was silently unroutable (e.g. intFromUInt64, uint64ToFloat). Both wire directions for these already existed: the compiled side encodes via Stdlib..toString (marshalTyped) and the daemon decodes with .NET's full-range parse (wireToDval), so UInt64 round-trips as a decimal string — not the Int64 wire that would overflow >= 2^63. Only the gate was missing. Safe by construction: rtToMarshalable also gates returns, but unmarshalTyped ends in `| other -> Error "unmarshalable-return: {other}"`, so a UInt/narrow-Int RETURN yields a clean blocker, never a silent raw-string value. So the only fns that newly compile are those whose sized-int types are all in ARG position with an already-decodable return — and those args round-trip correctly. Verify: +5 compile on a 385-fn blocked sample (~15 tree-wide); the provable one (763b1d43, a UInt-arg fn) matches the interpreter; differential over 194 known-good fns still 194/194, 0 DIFF. Sized-int RETURNS still need unmarshalTyped cases + a UInt64-safe parser (task #31). Claude-Session: https://claude.ai/code/session_015dcGWPp734R2y8UP3Qtva1 --- .../src/Builtins/Builtins.Compiler/Libs/Compiler.fs | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 466092d33c..8a3eb0aea1 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -142,6 +142,18 @@ let rec private rtToMarshalable (t : TypeReference) : AST.Type option = | TInt -> Some AST.TInt64 | TBool -> Some AST.TBool | TUnit -> Some AST.TUnit + // Sized ints marshal as decimal strings on the wire: the compiled side encodes via + // Stdlib..toString (marshalTyped) and the daemon decodes with .NET's full-range + // parse (wireToDval). UInt64 is round-trip-safe this way (decimal string, not the + // Int64 wire that would overflow >=2^63). This gates UInt-arg builtins into the seam + // (intFromUInt64, uint64ToFloat, ...); UInt *returns* also need an unmarshalTyped case. + | TInt8 -> Some AST.TInt8 + | TInt16 -> Some AST.TInt16 + | TInt32 -> Some AST.TInt32 + | TUInt8 -> Some AST.TUInt8 + | TUInt16 -> Some AST.TUInt16 + | TUInt32 -> Some AST.TUInt32 + | TUInt64 -> Some AST.TUInt64 // A Blob marshals as its byte values (marshalTypedSeen's TBytes / dvalToWire's // DBlob), so it can cross the seam in either direction. Without this case, any // Blob-taking builtin was unroutable — which is why stringFromBlobWithReplacement From 9f554e997fa63eeb4bd20946c2bcd9a034398a13 Mon Sep 17 00:00:00 2001 From: Stachu Korick Date: Sat, 18 Jul 2026 19:21:37 -0400 Subject: [PATCH 172/172] compiler: bind generic type args when synthesizing proof-harness args MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit sampleArgDeep (the differential harness's arg synthesizer) ignored a generic custom type's type ARGS: it read `Option<'a>`'s definition and sampled `'a` as the fallback Int64, so a param typed `Option` got `Some(42)` and the whole call failed to type-check. That's ~a fifth of the known-good set stuck in `cf` (compiled fine, unprovable) purely because the harness couldn't build a valid input. Fix: substituteType binds each custom type's declared params to its actual type args before descending, so `Option` samples `Some("hello")`. Depth- and node-budget-bounded (maxSampleDepth/sampleNodeBudget) so wide nested records don't build an arg that makes the proof crawl. On a 389-fn sample this collapses `cf` ~77 -> ~22 and pushes proven matches up accordingly. It also surfaces 2 real miscompiles that were never exercisable before (task #32: first numeric field of a JSON-serialized record compiles to garbage float bits) — which is the point: more of the tree becomes provable, and the bugs it finds were always there. Not free: fns whose interpreter execution is genuinely slow now hit the per-fn timeout as harness-drop instead of failing fast at arg-synth. The sweep's per-fn retry isolates them so they don't hang the run, but a real fix wants interpreter cancellation (task #27). Claude-Session: https://claude.ai/code/session_015dcGWPp734R2y8UP3Qtva1 --- .../Builtins.Compiler/Libs/Compiler.fs | 83 ++++++++++++++++--- 1 file changed, 73 insertions(+), 10 deletions(-) diff --git a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs index 8a3eb0aea1..6fe933d2dc 100644 --- a/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs +++ b/backend/src/Builtins/Builtins.Compiler/Libs/Compiler.fs @@ -1278,29 +1278,75 @@ let rec private sampleArg (t : PT.TypeReference) : Option = /// Bridge.marshalTyped (its mirror). Same bytes on both sides or it's a real diff. /// /// Returns "match", "DIFF|c=…|i=…", or a reason it couldn't be proven either way. -let rec private sampleArgDeep +/// Substitute bound type variables. A generic custom type's field/case types are +/// written in terms of the type's own params (`Some('a)`); to sample `Option` +/// we must replace `'a` with `String` before descending, or the sampled value has the +/// wrong element type and the harness's call fails to type-check (the whole +/// `Expected Option, got Option` bucket, ~20% of the known-good set). +let rec private substituteType + (subst : Map) + (t : PT.TypeReference) + : PT.TypeReference = + if Map.isEmpty subst then t + else + match t with + | PT.TVariable name -> + match Map.tryFind name subst with + | Some replacement -> replacement + | None -> t + | PT.TList inner -> PT.TList(substituteType subst inner) + | PT.TStream inner -> PT.TStream(substituteType subst inner) + | PT.TDict inner -> PT.TDict(substituteType subst inner) + | PT.TDB inner -> PT.TDB(substituteType subst inner) + | PT.TTuple(a, b, rest) -> + PT.TTuple(substituteType subst a, substituteType subst b, List.map (substituteType subst) rest) + | PT.TCustomType(nr, targs) -> PT.TCustomType(nr, List.map (substituteType subst) targs) + | PT.TFn(args, ret) -> PT.TFn(NEList.map (substituteType subst) args, substituteType subst ret) + | other -> other + +/// Total sampled-node budget + depth cap. A record whose fields are records (fan-out N) +/// nesting records explodes as N^depth, and the interpreter runs the arg twice per proof, +/// so wide nested-record fns produce args that make the proof crawl. Bounds keep sampled +/// values reasonable; genuinely slow-to-EXECUTE fns are handled by the sweep's per-fn +/// timeout (they drop as harness-drop, they don't hang the sweep) — no interpreter +/// cancellation needed. +let private maxSampleDepth = 5 +let private sampleNodeBudget = 256 + +let rec private sampleArgDeepAt + (budget : int ref) + (depth : int) (seen : Set) + (subst : Map) (t : PT.TypeReference) : Ply> = uply { + // Resolve any type vars bound by an enclosing generic type before matching. + let t = substituteType subst t + if depth > maxSampleDepth || budget.Value <= 0 then return None + else + budget.Value <- budget.Value - 1 match t with | PT.TList inner -> - let! v = sampleArgDeep seen inner - return v |> Option.map (fun v -> DList(Dval.toValueType v, [ v; v; v ])) + let! v = sampleArgDeepAt budget (depth + 1) seen subst inner + // 3 elements at the top to catch multi-element bugs (e.g. #26), 1 when nested + // so the sample size stays bounded instead of growing as N^depth. + let n = if depth = 0 then 3 else 1 + return v |> Option.map (fun v -> DList(Dval.toValueType v, List.replicate n v)) | PT.TTuple(a, b, rest) -> - let! a' = sampleArgDeep seen a - let! b' = sampleArgDeep seen b + let! a' = sampleArgDeepAt budget (depth + 1) seen subst a + let! b' = sampleArgDeepAt budget (depth + 1) seen subst b let mutable restVs = [] let mutable ok = true for r in rest do - let! rv = sampleArgDeep seen r + let! rv = sampleArgDeepAt budget (depth + 1) seen subst r match rv with | Some v -> restVs <- restVs @ [ v ] | None -> ok <- false match a', b', ok with | Some a'', Some b'', true -> return Some(DTuple(a'', b'', restVs)) | _ -> return None - | PT.TCustomType(nr, _targs) -> + | PT.TCustomType(nr, targs) -> match nr.resolved with | Error _ -> return None | Ok resolved -> @@ -1315,14 +1361,22 @@ let rec private sampleArgDeep | Some pt -> let seen' = Set.add h seen let rtName = FQTypeName.Package(Hash h) + // Bind this type's params to the (already-substituted) type args. The + // inner definition uses its OWN param names, a fresh scope — so field/case + // types below are sampled under subst', not the outer subst. + let tps = pt.declaration.typeParams + let n = min (List.length tps) (List.length targs) + let subst' = + List.zip (List.truncate n tps) (List.truncate n targs) |> Map.ofList match pt.declaration.definition with - | PT.TypeDeclaration.Alias inner -> return! sampleArgDeep seen' inner + // Alias is transparent — don't spend a depth level on it. + | PT.TypeDeclaration.Alias inner -> return! sampleArgDeepAt budget depth seen' subst' inner | PT.TypeDeclaration.Record fields -> let fs = NEList.toList fields let mutable acc = [] let mutable ok = true for (f : PT.TypeDeclaration.RecordField) in fs do - let! v = sampleArgDeep seen' f.typ + let! v = sampleArgDeepAt budget (depth + 1) seen' subst' f.typ match v with | Some v' -> acc <- acc @ [ (f.name, v') ] | None -> ok <- false @@ -1337,7 +1391,7 @@ let rec private sampleArgDeep let mutable acc = [] let mutable ok = true for (f : PT.TypeDeclaration.EnumField) in c.fields do - let! v = sampleArgDeep seen' f.typ + let! v = sampleArgDeepAt budget (depth + 1) seen' subst' f.typ match v with | Some v' -> acc <- acc @ [ v' ] | None -> ok <- false @@ -1346,6 +1400,15 @@ let rec private sampleArgDeep | scalar -> return sampleArg scalar } +/// Sample a realistic value for a type, descending into custom types and binding +/// generic type args. Depth- and node-budget-bounded so nested/wide records don't +/// build an arg that makes the proof crawl. +let private sampleArgDeep + (seen : Set) + (t : PT.TypeReference) + : Ply> = + sampleArgDeepAt (ref sampleNodeBudget) 0 seen Map.empty t + /// Bind a generic fn's type params by matching its DECLARED param types against the /// types of the actual arguments. `List.head` declares `List<'a> -> Option<'a>`, so /// without this its return type still mentions 'a and can't be serialized (nor can a