Add Zig highlighting

assets/highlighting-tests/zig.zig

@@ -0,0 +1,189 @@
+// Single-line comment
+/// Documentation comment.
+
+// Imports
+const std = @import("std");
+const builtin = @import("builtin");
+
+// Constants and variables
+const answer: i32 = 42;
+const pi = 3.14159;
+var counter: usize = 0;
+pub const name = "Zig";
+
+// Integer literals
+const decimal = 123;
+const binary = 0b1010_0101;
+const octal = 0o755;
+const hex = 0xDEAD_BEEF;
+const separated = 1_000_000;
+
+// Floating-point literals
+const float = 3.14;
+const exponent = 1.5e-3;
+const hex_float = 0x1.8p1;
+
+// Character and string literals
+const char = 'a';
+const newline = '\n';
+const unicode = '\u{1F600}';
+const string = "escapes: \" \\ \n \t";
+
+// Multiline string
+const multiline =
+    \\first line
+    \\second line
+;
+
+// Identifiers
+const @"quoted identifier" = 123;
+const snake_case = true;
+
+// Operators
+const arithmetic = 1 + 2 * 3 - 4 / 2 % 2;
+const comparison = a == b and c != d or e >= f;
+const bitwise = x & y | z ^ w;
+const shifts = value << 2 >> 1;
+const wrapping = a +% b;
+const saturating = a +| b;
+
+// Struct
+const Point = struct {
+    x: i32,
+    y: i32,
+
+    pub fn init(x: i32, y: i32) Point {
+        return .{ .x = x, .y = y };
+    }
+};
+
+const origin = Point{
+    .x = 0,
+    .y = 0,
+};
+
+// Enum
+const Color = enum {
+    red,
+    green,
+    blue,
+};
+
+// Tagged union
+const Value = union(enum) {
+    integer: i64,
+    float: f64,
+    boolean: bool,
+};
+
+// Arrays, slices, tuples
+const array = [_]u8{ 1, 2, 3, 4 };
+const slice = array[1..3];
+const tuple = .{ 42, true, "hello" };
+
+// Pointers
+var value: i32 = 42;
+const ptr: *i32 = &value;
+const many_ptr: [*]i32 = undefined;
+const sentinel_ptr: [*:0]const u8 = undefined;
+
+// Functions
+fn add(a: i32, b: i32) i32 {
+    return a + b;
+}
+
+fn generic(comptime T: type, value: T) T {
+    return value;
+}
+
+// If / else
+fn classify(x: i32) i32 {
+    if (x > 10) {
+        return 1;
+    } else if (x == 10) {
+        return 0;
+    } else {
+        return -1;
+    }
+}
+
+// While / for / labels
+fn loops() void {
+    var i: usize = 0;
+
+    while (i < 10) : (i += 1) {
+        if (i == 5) continue;
+        if (i == 8) break;
+    }
+
+    for (array, 0..) |item, index| {
+        _ = item;
+        _ = index;
+    }
+
+    outer: for (array) |item| {
+        if (item == 3) break :outer;
+    }
+}
+
+// Switch
+fn describe(value: Value) void {
+    switch (value) {
+        .integer => |x| _ = x,
+        .float => |x| _ = x,
+        .boolean => |x| _ = x,
+    }
+}
+
+// Optionals
+fn optional(value: ?i32) i32 {
+    return value orelse 0;
+}
+
+// Errors
+const MyError = error{
+    NotFound,
+    InvalidValue,
+};
+
+fn mightFail() MyError!i32 {
+    return error.NotFound;
+}
+
+fn handleError() !void {
+    const result = try mightFail();
+    _ = result;
+
+    _ = mightFail() catch 42;
+}
+
+// Defer
+fn cleanup() void {
+    defer std.debug.print("done\n", .{});
+}
+
+// Comptime / builtins
+const type_of_value = @TypeOf(value);
+const size_of_point = @sizeOf(Point);
+const alignment = @alignOf(Point);
+const field_name = @tagName(Color.red);
+
+// Builtin-heavy expression
+const converted = @intCast(@as(u64, 42));
+const bits = @bitCast(@as(u32, 0x3F800000));
+
+// Extern / export / calling convention
+extern fn external_function(x: i32) i32;
+
+export fn exported_function(x: i32) callconv(.c) i32 {
+    return x;
+}
+
+// Tests
+test "basic arithmetic" {
+    try std.testing.expect(add(1, 2) == 3);
+}
+
+test "optional" {
+    try std.testing.expect(optional(null) == 0);
+}

crates/lsh/definitions/zig.lsh

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+#[display_name = "Zig"]
+#[path = "**/*.zig"]
+#[path = "**/*.zon"]
+pub fn zig() {
+    until /$/ {
+        yield other;
+
+        if /\/\/.*/ {
+            yield comment;
+        } else if /\\\\.*/ {
+            yield string;
+        } else if /"/ {
+            loop {
+                if /\\./ {
+                } else if /"/ {
+                    yield string;
+                    break;
+                } else if /$/ {
+                    yield string;
+                    break;
+                } else if /./ {}
+            }
+        } else if /'(\\.|[^'\\])'/ {
+            yield string;
+        } else if /@([a-zA-Z_]\w*)\s*\(/ {
+            yield $1 as method;
+        } else if /@[a-zA-Z_]\w*/ {
+            yield storage.annotation;
+        } else if /(?:break|continue|return|try|catch|orelse|if|else|switch|while|for|suspend|resume|async|await|defer|errdefer|unreachable)\>/ {
+            yield keyword.control;
+        } else if /(?:const|var|fn|pub|usingnamespace|struct|enum|union|error|opaque|inline|noinline|comptime|callconv|volatile|allowzero|align|linksection|threadlocal|anytype)\>/ {
+            yield keyword.other;
+        } else if /(?:true|false|null|undefined|nil)\>/ {
+            yield constant.language;
+        } else if /(?:i\d+|u\d+|f16|f32|f64|f128|isize|usize|bool|void|noreturn|type|anyerror)\>/ {
+            yield storage.type;
+        } else if /-?(?:0x[0-9a-fA-F_]+|0b[01_]+|0o[0-7_]+|\d[\d_]*(?:\.\d[\d_]*)?)\>/ {
+            if /\w+/ {
+            } else {
+                yield constant.numeric;
+            }
+        } else if /\.[a-zA-Z_]\w*/ {
+            yield variable; // Catches ZON field keys like .name, .version
+        } else if /(\w+)\s*\(/ {
+            yield $1 as method;
+        } else if /\w+/ {
+            // Gobble word chars
+        }
+
+        yield other;
+    }
+}