Implementation of Fortran API for PSO#34
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…thon - Add src/pso.f: ONE Fortran 77 subroutine PSO that performs a complete PSO iteration step (personal-best update, global-best update, velocity update, position update + clamping, integer rounding) - Add src/_pyswarm.pyf: f2py interface with intent(hide) dimension args giving clean Python call signature with no exposed size arguments - Add src/meson.build: builds _pyswarm extension module via f2py/meson, installs into pyswarm/ package directory (subdir: 'pyswarm') - Add meson.build: root meson project (fortran+c), version from setuptools_scm - Add pyswarm/meson.build: installs pure-Python package sources - Replace pyproject.toml build-system: hatchling → meson-python + setuptools_scm; add [tool.cibuildwheel] and [tool.setuptools_scm] - Delete pyswarm/pso.py: no separate PSO Python module needed - Rewrite pyswarm/__init__.py: scipy.optimize-style OptimizeResult, pso() wrapper drives outer loop + obj evaluation, delegates every PSO math step to the single Fortran kernel (_pso_step) - Update all tests: import from pyswarm (not pyswarm.pso), use result.x / result.fun instead of tuple unpacking - Add bin/build.py, bin/get_version.py (from f2py-tpl reference) - Update .github/workflows/dist_build.yml: cibuildwheel multi-platform wheel builds (Linux x86_64, macOS arm64, Windows AMD64) - Update .gitignore: add meson build artefact patterns Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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- src/pso.f: rewrite as ONE complete Fortran 77 subroutine that runs the entire PSO algorithm (init, MAXITER loop, convergence checks). Uses an f2py EXTERNAL callback EVAL that Fortran calls per particle — zero Python loops in pso(); feasibility encoded as return >= 1.0D300. All dummy arrays use adjustable dimensions (valid F77), workspace arrays FX and XTMP are hidden dummy args allocated by f2py. - src/_pyswarm.pyf: add __user__routines module for callback signature; MAXITER/NSWARM/NDIM/NIVAR hidden via intent(hide)+depend; FX/XTMP hidden workspace; X/V intent(in,out); G/FG/P/FP/NITERS/STATUS out. - pyswarm/__init__.py: remove the while-loop entirely; Python only validates inputs, builds _eval closure (obj + feasibility sentinel), pre-generates rnd_p/rnd_g, calls _fortran_pso() once, unpacks result. - pyswarm/meson.build: remove pso.py from install_sources (it was deleted in the first commit); fixes 'File pso.py does not exist' error. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…available Ensure __init__.py is packaged into the pyswarm package so the compiled extension and package import correctly. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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