* Compose native text signatures at compile time from FromArgs
FromArgs gains a PARAMS const describing its Python parameters.
The derive builds the whole internal doc, `name(sig)\n--\n\ndoc`,
in a const context from those params, and `__text_signature__` /
`__doc__` parse it from the doc. The macro-time string path and the
runtime sig_parts composition are removed.
Signatures follow clinic conventions: `$module` for module functions,
Rust literal defaults rendered as Python reprs, other defaults as
`<unrepresentable>`, and a new `#[pyarg(py_default = "...")]` for the
few fields whose Rust default differs from the Python one. The
`#[pyarg]` keys are documented on the FromArgs derive.
Module functions keep their module object and return it from
`__self__`. PyNativeFunction now traverses its references.
os.stat, os.mkdir, os.listdir, os.open, dict.fromkeys, round, sorted,
int.to_bytes and bytes.hex take arguments matching their signatures.
Assisted-by: Grok:grok-4.7
Assisted-by: Claude:claude-opus-5-5
* Update builtin_signature snippet and fix mkdir on Windows
round and sum now report their FromArgs parameters, so the snippet
asserts their signatures instead of their absence. sum's start is a
PyObjectRef defaulting to int 0 with py_default "0". mkdir reads
dir_fd only on platforms that use it.
Assisted-by: Claude:claude-opus-5-5
* Remove expectedFailure from two signature tests
test_cmp_to_signature and test_autospec_on_bound_builtin_function
now pass. The TestCmpToKeyC override existed only for the marker.
Assisted-by: Claude:claude-opus-5-5
The `page_size` crate is a simple libc wrapper for Unix and uses
`winapi-rs` for Windows. `windows-sys` and `windows-rs` are the modern
alternatives for the unmaintained `winapi-rs`. Both crates are
maintained by Microsoft - they're official. Getting the page size is a
simple call for both Unix and Windows.
Besides Unix and Windows, I also added the page size for wasm32 which
the `page_size` crate did not support. `wasm32`'s page size is a
constant that is defined by the spec, so I hard coded it without adding
additional dependencies.
Finally, I dropped `maplit` which is seven years old and only used in
one place. Calling `collect()` with a single item iterator is idiomatic
as well as better in this case because Rust can optimize it. `maplit`
called `HashMap::insert` which over allocates to amortize future allocs.
Jeong, YunWon