serpentine-shim

The runtime companion of the Serpentine compiler. It provides the ownership vocabulary — Owned, Ref, Mut, Shared, Weak, move, @native — as runtime no-ops, so a Serpentine program is also a valid, runnable CPython program:

from serpentine import Owned, Ref, move

def total(prices: Ref[list[float]]) -> float:
    return sum(prices)

def main() -> None:
    prices: Owned[list[float]] = [9.99, 4.50]
    print(total(prices))
    archive = move(prices)   # lambda x: x at runtime; a semantic move to `serp check`

Under CPython this package does nothing except make the imports resolve: the wrappers are typing.Annotated aliases (so Owned[list[float]] is list[float] to any type checker) and move returns its argument. All semantics live in the static checker, serp check.

This package is intentionally frozen and tiny: its public API is part of the Serpentine language spec (docs/spec.md).

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Credits

Author: Serpentine contributors

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License

MIT License (MIT)

Requires

Python >=3.11

Tags

serpentine ownership borrow-checker aot compiler

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