Update dependency cython to v3

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
cython (source)	<3.0 -> <3.1

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Release Notes

cython/cython (cython)

v3.0.11

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===================

Features added

• The C++11 emplace* methods were added to libcpp.deque.
  Patch by Somin An. (Github issue :issue:6159)

Bugs fixed

• The exception check value of functions declared in pxd files was not always applied in 3.0.10.
  (Github issue :issue:6122)

• A crash on exception deallocations was fixed.
  (Github issue :issue:6022)

• A crash was fixed when assigning a zero-length slice to a memoryview.
  Patch by Michael Man. (Github issue :issue:6227)

• libcpp.optional.value() could crash if it raised a C++ exception.
  Patch by Alexander Condello. (Github issue :issue:6190)

• The return type of str() was mishandled, leading to crashes with language_level=3.
  (Github issue :issue:6166)

• bytes.startswith/endswith() failed for non-bytes substrings (e.g. bytearray).
  (Github issue :issue:6168)

• Fused ctuples crashed Cython.
  (Github issue :issue:6068)

• A compiler crash was fixed when using extension types in fused types.
  (Github issue :issue:6204)

• The module cleanup code was incorrect for globally defined memory view slices.
  (Github issue :issue:6276)

• Some adaptations were made to enable compilation in Python 3.13.
  (Github issues :issue:5997, :issue:6182, :issue:6251)

v3.0.10

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===================

Bugs fixed

• Cython generated incorrect self-casts when directly calling final methods of subtypes.
  Patch by Lisandro Dalcin. (Github issue :issue:2747)

• Internal C names generated from C function signatures could become too long for MSVC.
  (Github issue :issue:6052)

• The noexcept warnings could be misleading in some cases.
  Patch by Gonzalo Tornaría. (Github issue :issue:6087)

• The @cython.ufunc implementation could generate incomplete C code.
  (Github issue :issue:6064)

• The libcpp.complex declarations could result in incorrect C++ code.
  Patch by Raffi Enficiaud. (Github issue :issue:6037)

• Several tests were adapted to work with both NumPy 1.x and 2.0.
  Patch by Matti Picus. (Github issues :issue:6076, :issue:6100)

• C compiler warnings when the freelist implementation is disabled (e.g. on PyPy) were fixed.
  It can now be disabled explicitly with the C macro guard CYTHON_USE_FREELISTS=0.
  (Github issue :issue:6099)

• Some C macro guards for feature flags were missing from the NOGIL Python configuration.

• Some recently added builtins were unconditionally looked up at module import time
  (if used by user code) that weren't available on all Python versions and could thus
  fail the import.

• A performance hint regarding exported pxd declarations was improved.
  (Github issue :issue:6001)

v3.0.9

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==================

Features added

• Assigning const values to non-const variables now issues a warning.
  (Github issue :issue:5639)

• Using noexcept on a function returning Python objects now issues a warning.
  (Github issue :issue:5661)

• Some C-API usage was updated for the upcoming CPython 3.13.
  Patches by Victor Stinner et al. (Github issues :issue:6003, :issue:6020)

• The deprecated Py_UNICODE type is no longer used, unless required by user code.
  (Github issue :issue:5982)

• std::string.replace() declarations were added to libcpp.string.
  Patch by Kieran Geary. (Github issue :issue:6037)

Bugs fixed

• Cython generates incorrect (but harmless) self-casts when directly calling
  final methods of subtypes. Lacking a better solution, the errors that recent
  gcc versions produce have been silenced for the time being.
  Original patch by Michał Górny. (Github issue :issue:2747)

• Unused variable warnings about clineno were fixed when C lines in tracebacks are disabled.
  (Github issue :issue:6035)

• Subclass deallocation of extern classes could crash if the base class uses GC.
  Original patch by Jason Fried. (Github issue :issue:5971)

• Type checks for Python memoryview could use an invalid C function.
  Patch by Xenia Lu. (Github issue :issue:5988)

• Calling final fused functions could generate invalid C code.
  (Github issue :issue:5989)

• Declaring extern enums multiple times could generate invalid C code.
  (Github issue :issue:5905)

• pyximport used relative paths incorrectly.
  Patch by Stefano Rivera. (Github issue :issue:5957)

• Running Cython with globbing characters ([]*?) in the module search path could fail.
  Patch by eewanco. (Github issue :issue:5942)

• Literal strings that include braces could change the C code indentation.

Other changes

• The "enum class not importable" warning is now only issued once per enum type.
  (Github issue :issue:5941)

v3.0.8

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==================

Bugs fixed

• Using const together with defined fused types could fail to compile.
  (Github issue :issue:5230)

• A "use after free" bug was fixed in parallel sections.
  (Github issue :issue:5922)

• Several types were not available as cython.* types in pure Python code.

• The generated code is now correct C89 again, removing some C++ style // comments
  and C99-style declaration-after-code code ordering. This is still relevant for some
  ols C compilers, specifically ones that match old Python 2.7 installations.

v3.0.7

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==================

Bugs fixed

• In the iterator of generator expressions, await and yield were not correctly analysed.
  (Github issue :issue:5851)

• cpdef enums with the same name cimported from different modules could lead to
  invalid C code.
  (Github issue :issue:5887)

• Some declarations in cpython.unicode were fixed and extended.
  (Github issue :issue:5902)

• Compiling fused types used in pxd files could crash Cython in Python 3.11+.
  (Github issues :issue:5894, :issue:5588)

• Source files with non-ASCII file names could crash Cython.
  (Github issue :issue:5873)

• Includes all bug-fixes and features from the 0.29 maintenance branch
  up to the :ref:0.29.37 release.

v3.0.6

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==================

Features added

• Fused def function dispatch is a bit faster.

• Declarations for the wchar PyUnicode API were added.
  (Github issue :issue:5836)

• The Python "nogil" fork is now also detected with the new Py_GIL_DISABLED macro.
  Patch by Hugo van Kemenade. (Github issue :issue:5852)

Bugs fixed

• Comparing dataclasses could give different results than Python.
  (Github issue :issue:5857)

• float(std::string) generated invalid C code.
  (Github issue :issue:5818)

• Using cpdef functions with cimport_from_pyx failed.
  (Github issue :issue:5795)

• A crash was fixed when string-formatting a Python value fails.
  (Github issue :issue:5787)

• On item access, Cython could try the sequence protocol before the mapping protocol
  in some cases if an object supports both.
  (Github issue :issue:5776)

• A C compiler warning was resolved.
  (Github issue :issue:5794)

• Complex numbers failed to compile in MSVC with C11.
  Patch by Lysandros Nikolaou. (Github issue :issue:5809)

• Some issues with the Limited API and with PyPy were resolved.
  (Github issues :issue:5695, :issue:5696)

• A C++ issue in Python 3.13 was resolved.
  (Github issue :issue:5790)

• Several directives are now also available (as no-ops) in Python code.
  (Github issue :issue:5803)

• An error message was corrected.
  Patch by Mads Ynddal. (Github issue :issue:5805)

v3.0.5

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==================

Features added

• Preliminary support for CPython 3.13a1 was added to allow early testing.
  (Github issue :issue:5767)

Bugs fixed

• A compiler crash was fixed.
  (Github issue :issue:5771)

• A typo in the always_allow_keywords directive for Python code was fixed.
  Patch by lk-1984. (Github issue :issue:5772)

• Some C compiler warnings were resolved.
  Patch by Pierre Jolivet. (Github issue :issue:5780)

v3.0.4

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==================

Features added

• A new compiler directive show_performance_hints was added to disable the
  newly added performance hint output.
  (Github issue :issue:5748)

Bugs fixed

• ```cythonize required ``distutils`` even for operations that did not build binaries. (Github issue :issue:5751`)

• A regression in 3.0.3 was fixed that prevented calling inline functions
  from another inline function in .pxd files.
  (Github issue :issue:5748)

• Some C compiler warnings were resolved.
  Patch by Pierre Jolivet. (Github issue :issue:5756)

v3.0.3

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==================

Features added

• More warnings were added to help users migrate and avoid bugs.
  (Github issue :issue:5650)

• A warning-like category for performance hints was added that bypasses -Werror.
  (Github issue :issue:5673)

• FastGIL now uses standard thread_local in C++.
  (Github issue :issue:5640)

• reference_wrapper was added to libcpp.functional.
  Patch by Vyas Ramasubramani. (Github issue :issue:5671)

• The cythonize command now supports the --cplus option known from the cython command.
  (Github issue :issue:5736)

Bugs fixed

• Performance regressions where the GIL was needlessly acquired were fixed.
  (Github issues :issue:5670, :issue:5700)

• A reference leak for exceptions in Python 3.12 was resolved.
  Patch by Eric Johnson. (Github issue :issue:5724)

• fastcall calls with keyword arguments generated incorrect C code.
  (Github issue :issue:5665)

• Assigning the type converted result of a conditional (if-else) expression
  to int or bool variables could lead to incorrect C code.
  (Github issue :issue:5731)

• Early (unlikely) failures in Python function wrappers no longer set a
  traceback in order to simplify the C code flow. Being mostly memory
  allocation errors, they probably would never have created a traceback anyway.
  (Github issue :issue:5681)

• Relative cimports from packages with __init__.py files could fail.
  (Github issue :issue:5715)

• Several issues with the Limited API support were resolved.
  (Github issues :issue:5641, :issue:5648, :issue:5689)

• The code generated for special-casing both Cython functions and PyCFunctions was cleaned up
  to avoid calling C-API functions that were not meant for the other type respectively.
  This could previously trigger assertions in CPython debug builds and now also plays better
  with the Limited API.
  (Github issues :issue:4804, :issue:5739)

• Fix some C compiler warnings.
  Patches by Ralf Gommers, Oleksandr Pavlyk, Sebastian Koslowski et al.
  (Github issues :issue:5651, :issue:5663, :issue:5668, :issue:5717, :issue:5726, :issue:5734)

• Generating gdb debugging information failed when using generator expressions.
  Patch by Oleksandr Pavlyk. (Github issue :issue:5552)

• Passing a setuptools.Extension into cythonize() instead of a
  distutils.Extension could make it miss the matching extensions.

• cython -M needlessly required distutils, which made it fail in Python 3.12.
  (Github issue :issue:5681)

Other changes

• The visible deprecation warning for DEF was removed again since it proved
  difficult for some users to migrate away from it. The statement is still
  meant to be removed at some point (and thus, like IF, should not be
  used in new code), but the time for sunset is probably not around the corner.
  (Github issue :issue:4310)

• The np_pythran option raise a DeprecationWarning if it receives other values
  than True and False. This will eventually be disallowed (in line with all
  other boolean options).

v3.0.2

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==================

Bugs fixed

• Using None as default value for arguments annotated as int could crash Cython.
  (Github issue :issue:5643)

• Default values of fused types that include complex could generate invalid C code
  with -DCYTHON_CCOMPLEX=0.
  (Github issue :issue:5644)

• Using C++ enum class types in extension type method signatures could generate invalid C code.
  (Github issue :issue:5637)

v3.0.1

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===================

Bugs fixed

• Release 3.0.11 introduced some incorrect noexcept warnings.
  (Github issue :issue:6335)

• Conditional assignments to variables using the walrus operator could crash.
  (Github issue :issue:6094)

• Dict assignments to struct members with reserved C names could generate invalid C code.

• Fused ctuples with the same entry types but different sizes could fail to compile.
  (Github issue :issue:6328)

• In Py3, pyximport was not searching sys.path when looking for importable source files.
  (Github issue :issue:5615)

v3.0.0

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===========================

Cython 3.0.0 has been a very large effort that cleaned up many old warts,
introduced many new features, and introduces a couple of intentional
behaviour changes, even though the goal remained to stay compatible as
much as possible with Cython 0.29.x. For details, see the migration guide_.

.. _migration guide: https://cython.readthedocs.io/en/latest/src/userguide/migrating_to_cy30.html

As the development was spread out over several years, a lot of things have
happened in the meantime. Many crucial bugfixes and some features were
backported to 0.29.x and are not strictly speaking "new" in Cython 3.0.0.

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[misl6]

Keep it on <3 for now, we will likely remove it once all the recipes are built in an isolated environment.