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diff --git a/CHANGES.rst b/CHANGES.rst index f85b9dabd..a68e3c992 100644 --- a/CHANGES.rst +++ b/CHANGES.rst @@ -2,6 +2,1410 @@ Cython Changelog ================ +3.0.0 beta 3 (2023-??-??) +========================= + +Features added +-------------- + +* The ``extern "C"`` and ``extern "C++"`` markers that Cython generates for + ``public`` functions can now be controlled by setting the C macro ``CYTHON_EXTERN_C``. + +Bugs fixed +---------- + +* Some C compile failures in CPython 3.12.0a6/a7 were resolved. + +* Cascaded comparisons between integer constants and Python types could fail to compile. + (Github issue :issue:`5354`) + +* The internal macro ``__PYX_IS_UNSIGNED`` was accidentally duplicated in beta 2 + which lead to C compile errors. + Patch by 0dminnimda. (Github issue :issue:`5356`) + +* The dataclass implementation was adapted to support Python 3.12. + (Github issue :issue:`5346`) + +* Function signatures containing a type like `tuple[()]` could not be printed. + Patch by Lisandro Dalcin. (Github issue :issue:`5355`) + +* Includes all bug-fixes and features from the 0.29 maintenance branch + up to the :ref:`0.29.34` release. + +Other changes +------------- + +* For-loops now release the internal reference to their list/tuple iterable before + instead of after the ``else:`` clause. This probably has no practical impact. + (Github issue :issue:`5347`) + + +3.0.0 beta 2 (2023-03-27) +========================= + +Features added +-------------- + +* C++ declarations for ``<cmath>``, ``<numbers>`` and ``std::any`` were added. + Patches by Jonathan Helgert and Maximilien Colange. + (Github issues :issue:`5262`, :issue:`5309`, :issue:`5314`) + +Bugs fixed +---------- + +* Unintended internal exception handling lead to a visible performance regression + for ``nogil`` memoryview code in 3.0.0b1. + (Github issue :issue:`5324`) + +* ``None`` default arguments for arguments with fused memoryview types could select a different + implementation in 3.0 than in 0.29.x. The selection behaviour is generally considered + suboptimal but was at least reverted to the old behaviour for now. + (Github issue :issue:`5297`) + +* The new complex vs. floating point behaviour of the ``**`` power operator accidentally + added a dependency on the GIL, which was really only required on failures. + (Github issue :issue:`5287`) + +* ``from cython cimport … as …`` could lead to imported names not being found in annotations. + Patch by Chia-Hsiang Cheng. (Github issue :issue:`5235`) + +* Generated NumPy ufuncs could crash for large arrays due to incorrect GIL handling. + (Github issue :issue:`5328`) + +* Very long Python integer constants could exceed the maximum C name length of MSVC. + Patch by 0dminnimda. (Github issue :issue:`5290`) + +* ``cimport_from_pyx`` could miss some declarations. + Patch by Chia-Hsiang Cheng. (Github issue :issue:`5318`) + +* Fully qualified C++ names prefixed by a cimported module name could fail to compile. + Patch by Chia-Hsiang Cheng. (Github issue :issue:`5229`) + +* Cython generated C++ code accidentally used C++11 features in some cases. + (Github issue :issue:`5316`) + +* Some C++ warnings regarding ``const`` usage in internally generated utility code were resolved. + Patch by Max Bachmann. (Github issue :issue:`5301`) + +* With ``language_level=2``, imports of modules in packages could return the wrong module in Python 3. + (Github issue :issue:`5308`) + +* ``typing.Optional`` could fail on tuple types. + (Github issue :issue:`5263`) + +* Auto-generated utility code didn't always have all required user defined types available. + (Github issue :issue:`5269`) + +* Type checks for Python's ``memoryview`` type generated incorrect C code. + (Github issues :issue:`5268`, :issue:`5270`) + +* Some issues with ``depfile`` generation were resolved. + Patches by Eli Schwartz. (Github issues :issue:`5279`, :issue:`5291`) + +* Some C code issue were resolved for the Limited API target. + (Github issues :issue:`5264`, :issue:`5265`, :issue:`5266`) + +* The C code shown in the annotated HTML output could lack the last C code line(s). + + +3.0.0 beta 1 (2023-02-25) +========================= + +Features added +-------------- + +* Cython implemented C functions now propagate exceptions by default, rather than + swallowing them in non-object returning function if the user forgot to add an + ``except`` declaration to the signature. This was a long-standing source of bugs, + but can require adding the ``noexcept`` declaration to existing functions if + exception propagation is really undesired. + (Github issue :issue:`4280`) + +* To opt out of the new, safer exception handling behaviour, legacy code can set the new + directive ``legacy_implicit_noexcept=True`` for a transition period to keep the + previous, unsafe behaviour. This directive will eventually be removed in a later release. + Patch by Matúš Valo. (Github issue :issue:`5094`) + +* A new function decorator ``@cython.ufunc`` automatically generates a (NumPy) ufunc that + applies the calculation function to an entire memoryview. + (Github issue :issue:`4758`) + +* The ``**`` power operator now behaves more like in Python by returning the correct complex + result if required by math. A new ``cpow`` directive was added to turn on the previous + C-like behaviour. + (Github issue :issue:`4936`) + +* The special ``__*pow__`` methods now support the 2- and 3-argument variants. + (Github issue :issue:`5160`) + +* Unknown type annotations (e.g. because of typos) now emit a warning at compile time. + Patch by Matúš Valo. (Github issue :issue:`5070`) + +* Subscripted builtin types in type declarations (like ``list[float]``) are now + better supported. + (Github issue :issue:`5058`) + +* Python's ``memoryview`` is now a known builtin type with optimised properties. + (Github issue :issue:`3798`) + +* The call-time dispatch for fused memoryview types is less slow. + (Github issue :issue:`5073`) + +* Integer comparisons avoid Python coercions if possible. + (Github issue :issue:`4821`) + +* The Python Enum of a ``cpdef enum`` now inherits from ``IntFlag`` to better match + both Python and C semantics of enums. + (Github issue :issue:`2732`) + +* `PEP-614 <https://peps.python.org/pep-0614/>`_: + decorators can now be arbitrary Python expressions. + (Github issue :issue:`4570`) + +* ``cpdef`` enums can now be pickled. + (Github issue :issue:`5120`) + +* Bound C methods can now coerce to Python objects. + (Github issues :issue:`4890`, :issue:`5062`) + +* C arrays can be initialised inside of nogil functions. + Patch by Matúš Valo. (Github issue :issue:`1662`) + +* ``reversed()`` can now be used together with C++ iteration. + Patch by Chia-Hsiang Cheng. (Github issue :issue:`5002`) + +* Standard C/C++ atomic operations are now used for memory views, if available. + (Github issue :issue:`4925`) + +* C11 ``complex.h`` is now properly detected. + (Github issue :issue:`2513`) + +* Nested ``cppclass`` definitions are supported. + Patch by samaingw. (Github issue :issue:`1218`) + +* ``cpp_locals`` no longer have to be "assignable". + (Github issue :issue:`4558`) + +* ``cythonize --help`` now also prints information about the supported environment variables. + Patch by Matúš Valo. (Github issue :issue:`1711`) + +* Declarations were added for the C++ bit operations, some other parts of C++20 and CPython APIs. + Patches by Jonathan Helgert, Dobatymo, William Ayd and Max Bachmann. + (Github issues :issue:`4962`, :issue:`5101`, :issue:`5157`, :issue:`5163`, :issue:`5257`) + +Bugs fixed +---------- + +* Generator expressions and comprehensions now look up their outer-most iterable + on creation, as Python does, and not later on start, as they did previously. + (Github issue :issue:`1159`) + +* Type annotations for Python ``int`` rejected ``long`` under Py2 in the alpha-11 release. + They are now ignored again (as always before) when ``language_level=2``, and accept + both ``int`` and ``long`` in Py2 (and only ``int`` in Py3) otherwise. + (Github issue :issue:`4944`) + +* Calling bound classmethods of builtin types could fail trying to call the unbound method. + (Github issue :issue:`5051`) + +* ``int(Py_UCS4)`` returned the code point instead of the parsed digit value. + (Github issue :issue:`5216`) + +* Several problems with CPython 3.12 were resolved. + (Github issue :issue:`5238`) + +* The C ``float`` type was not inferred on assignments. + (Github issue :issue:`5234`) + +* Memoryviews with ``object`` item type were not supported in Python type declarations. + (Github issue :issue:`4907`) + +* Iterating over memoryviews in generator expressions could leak a buffer reference. + (Github issue :issue:`4968`) + +* Memory views and the internal Cython array type now identify as ``collections.abc.Sequence`` + by setting the ``Py_TPFLAGS_SEQUENCE`` type flag directly. + (Github issue :issue:`5187`) + +* ``__del__`` finaliser methods were not always called if they were only inherited. + (Github issue :issue:`4995`) + +* Extension types are now explicitly marked as immutable types to prevent them from + being considered mutable. + Patch by Max Bachmann. (Github issue :issue:`5023`) + +* ``const`` types could not be returned from functions. + Patch by Mike Graham. (Github issue :issue:`5135`) + +* ``cdef public`` functions declared in .pxd files could use an incorrectly mangled C name. + Patch by EpigeneMax. (Github issue :issue:`2940`) + +* ``cdef public`` functions used an incorrect linkage declaration in C++. + Patch by Maximilien Colange. (Github issue :issue:`1839`) + +* C++ post-increment/-decrement operators were not correctly looked up on declared C++ + classes, thus allowing Cython declarations to be missing for them and incorrect C++ + code to be generated. + Patch by Max Bachmann. (Github issue :issue:`4536`) + +* C++ iteration more safely stores the iterable in temporary variables. + Patch by Xavier. (Github issue :issue:`3828`) + +* C++ references did not work on fused types. + (Github issue :issue:`4717`) + +* The module state struct was not initialised in correct C (before C23), leading to + compile errors on Windows. + Patch by yudonglin. (Github issue :issue:`5169`) + +* Structs that contained an array field resulted in incorrect C code. Their initialisation + now uses ``memcpy()``. + Patch by Chia-Hsiang Cheng. (Github issue :issue:`5178`) + +* Nesting fused types in other fused types could fail to specialise the inner type. + (Github issue :issue:`4725`) + +* The special methods ``__matmul__``, ``__truediv__``, ``__floordiv__`` failed to type + their ``self`` argument. + (Github issue :issue:`5067`) + +* Coverage analysis failed in projects with a separate source subdirectory. + Patch by Sviatoslav Sydorenko and Ruben Vorderman. (Github issue :issue:`3636`) + +* The ``annotation_typing`` directive was missing in pure Python mode. + Patch by 0dminnimda. (Github issue :issue:`5194`) + +* The ``@dataclass`` directive was accidentally inherited by methods and subclasses. + (Github issue :issue:`4953`) + +* Some issues with Cython ``@dataclass`` arguments, hashing, inheritance and ``repr()`` + were resolved. (Github issues :issue:`4956`, :issue:`5046`) + +* ``cpdef`` enums no longer use ``OrderedDict`` but ``dict`` in Python 3.6 and later. + Patch by GalaxySnail. (Github issue :issue:`5180`) + +* Larger numbers of extension types with multiple subclasses could take very long to compile. + Patch by Scott Wolchok. (Github issue :issue:`5139`) + +* Relative imports failed in compiled ``__init__.py`` package modules. + Patch by Matúš Valo. (Github issue :issue:`3442`) + +* Some old usages of the deprecated Python ``imp`` module were replaced with ``importlib``. + Patch by Matúš Valo. (Github issue :issue:`4640`) + +* The ``cython`` and ``cythonize`` commands ignored non-existing input files without error. + Patch by Matúš Valo. (Github issue :issue:`4629`) + +* Invalid and misspelled ``cython.*`` module names were not reported as errors. + (Github issue :issue:`4947`) + +* Unused ``**kwargs`` arguments did not show up in ``locals()``. + (Github issue :issue:`4899`) + +* Extended glob paths with ``/**/`` and ``\**\`` for finding source files failed on Windows. + +* Annotated HTML generation was missing newlines in 3.0.0a11. + (Github issue :issue:`4945`) + +* Some parser issues were resolved. + (Github issue :issue:`4992`) + +* ``setup.cfg`` was missing from the source distribution. + (Github issue :issue:`5199`) + +* Some C/C++ warnings were resolved. + Patches by Max Bachmann, Alexander Shadchin, at al. + (Github issues :issue:`5004`, :issue:`5005`, :issue:`5019`, :issue:`5029`, :issue:`5096`) + +* The embedding code no longer calls deprecated C-API functions but uses the new ``PyConfig`` + API instead on CPython versions that support it (3.8+). + Patch by Alexander Shadchin. (Github issue :issue:`4895`) + +* Intel C compilers could complain about unsupported gcc pragmas. + Patch by Ralf Gommers. (Github issue :issue:`5052`) + +* Includes all bug-fixes and features from the 0.29 maintenance branch + up to the :ref:`0.29.33` release. + +Other changes +------------- + +* The undocumented, untested and apparently useless syntax + ``from somemodule cimport class/struct/union somename`` was removed. The type + modifier is not needed here and a plain ``cimport`` of the name will do. + (Github issue :issue:`4904`) + +* C-style array declarations (``cdef int a[4]``) are now (silently) deprecated in + favour of the Java-style ``cdef int[4] a`` form. The latter was always available + and the Python type declaration syntax already used it exclusively (``a: int[4]``). + Patch by Matúš Valo. (Github issue :issue:`5248`) + +* The wheel building process was migrated to use the ``cibuildwheel`` tool. + Patch by Thomas Li. (Github issue :issue:`4736`) + +* Wheels now include a compiled parser again, which increases their size a little + but gives about a 10% speed-up when running Cython. + +* The ``Tempita`` module no longer contains HTML processing capabilities, which + were found to be broken in Python 3.8 and later. + Patch by Marcel Stimberg. (Github issue :issue:`3309`) + +* The Emacs Cython mode file ``cython-mode.el`` is now maintained in a separate repo: + https://github.com/cython/emacs-cython-mode + +* Cython now uses a ``.dev0`` version suffix for unreleased source installations. + + +3.0.0 alpha 11 (2022-07-31) +=========================== + +Features added +-------------- + +* A new decorator ``@cython.dataclasses.dataclass`` was implemented that provides + compile time dataclass generation capabilities to ``cdef`` classes (extension types). + Patch by David Woods. (Github issue :issue:`2903`). ``kw_only`` dataclasses + added by Yury Sokov. (Github issue :issue:`4794`) + +* Named expressions (PEP 572) aka. assignment expressions (aka. the walrus operator + ``:=``) were implemented. + Patch by David Woods. (Github issue :issue:`2636`) + +* Context managers can be written in parentheses. + Patch by David Woods. (Github issue :issue:`4814`) + +* Cython avoids raising ``StopIteration`` in ``__next__`` methods when possible. + Patch by David Woods. (Github issue :issue:`3447`) + +* Some C++ and CPython library declarations were extended and fixed. + Patches by Max Bachmann, Till Hoffmann, Julien Jerphanion, Wenjun Si. + (Github issues :issue:`4530`, :issue:`4528`, :issue:`4710`, :issue:`4746`, + :issue:`4751`, :issue:`4818`, :issue:`4762`, :issue:`4910`) + +* The ``cythonize`` and ``cython`` commands have a new option ``-M`` / ``--depfile`` + to generate ``.dep`` dependency files for the compilation unit. This can be used + by external build tools to track these dependencies. + The ``cythonize`` option was already available in Cython :ref:`0.29.27`. + Patches by Evgeni Burovski and Eli Schwartz. (Github issue :issue:`1214`) + +* ``cythonize()`` and the corresponding CLI command now regenerate the output files + also when they already exist but were generated by a different Cython version. + +* Memory views and the internal Cython array type now identify as ``collections.abc.Sequence``. + Patch by David Woods. (Github issue :issue:`4817`) + +* Cython generators and coroutines now identify as ``CO_ASYNC_GENERATOR``, + ``CO_COROUTINE`` and ``CO_GENERATOR`` accordingly. + (Github issue :issue:`4902`) + +* Memory views can use atomic CPU instructions instead of locks in more cases. + Patch by Sam Gross. (Github issue :issue:`4912`) + +* The environment variable ``CYTHON_FORCE_REGEN=1`` can be used to force ``cythonize`` + to regenerate the output files regardless of modification times and changes. + +* A new Cython build option ``--cython-compile-minimal`` was added to compile only a + smaller set of Cython's own modules, which can be used to reduce the package + and install size. + +* Improvements to ``PyTypeObject`` definitions in pxd wrapping of libpython. + Patch by John Kirkham. (Github issue :issue:`4699`) + + +Bugs fixed +---------- + +* Decorators like ``@cfunc`` and ``@ccall`` could leak into nested functions and classes. + Patch by David Woods. (Github issue :issue:`4092`) + +* Exceptions within for-loops that run over memoryviews could lead to a ref-counting error. + Patch by David Woods. (Github issue :issue:`4662`) + +* Using memoryview arguments in closures of inner functions could lead to ref-counting errors. + Patch by David Woods. (Github issue :issue:`4798`) + +* Several optimised string methods failed to accept ``None`` as arguments to their options. + Test patch by Kirill Smelkov. (Github issue :issue:`4737`) + +* A regression in 3.0.0a10 was resolved that prevented property setter methods from + having the same name as their value argument. + Patch by David Woods. (Github issue :issue:`4836`) + +* Typedefs for the ``bint`` type did not always behave like ``bint``. + Patch by Nathan Manville and 0dminnimda. (Github issue :issue:`4660`) + +* The return type of a fused function is no longer ignored for function pointers, + since it is relevant when passing them e.g. as argument into other fused functions. + Patch by David Woods. (Github issue :issue:`4644`) + +* The ``__self__`` attribute of fused functions reports its availability correctly + with ``hasattr()``. Patch by David Woods. + (Github issue :issue:`4808`) + +* ``pyximport`` no longer uses the deprecated ``imp`` module. + Patch by Matúš Valo. (Github issue :issue:`4560`) + +* ``pyximport`` failed for long filenames on Windows. + Patch by Matti Picus. (Github issue :issue:`4630`) + +* The generated C code failed to compile in CPython 3.11a4 and later. + (Github issue :issue:`4500`) + +* A case of undefined C behaviour was resolved in the list slicing code. + Patch by Richard Barnes. (Github issue :issue:`4734`) + +* Using the Limited API could report incorrect line numbers in tracebacks. + +* A work-around for StacklessPython < 3.8 was disabled in Py3.8 and later. + (Github issue :issue:`4329`) + +* Improve conversion between function pointers with non-identical but + compatible exception specifications. Patches by David Woods. + (Github issues :issue:`4770`, :issue:`4689`) + +* The runtime size check for imported ``PyVarObject`` types was improved + to reduce false positives and adapt to Python 3.11. + Patch by David Woods. (Github issues :issue:`4827`, :issue:`4894`) + +* The generated modules no longer import NumPy internally when using + fused types but no memoryviews. + Patch by David Woods. (Github issue :issue:`4935`) + +* Improve compatibility with forthcoming CPython 3.12 release. + +* Limited API C preprocessor warning is compatible with MSVC. Patch by + Victor Molina Garcia. (Github issue :issue:`4826`) + +* Some C compiler warnings were fixed. + Patch by mwtian. (Github issue :issue:`4831`) + +* The parser allowed some invalid spellings of ``...``. + Patch by 0dminnimda. (Github issue :issue:`4868`) + +* Includes all bug-fixes and features from the 0.29 maintenance branch + up to the :ref:`0.29.32` release. + +Other changes +------------- + +* When using type annotations, ``func(x: list)`` or ``func(x: ExtType)`` (and other + Python builtin or extension types) no longer allow ``None`` as input argument to ``x``. + This is consistent with the normal typing semantics in Python, and was a common gotcha + for users who did not expect ``None`` to be allowed as input. To allow ``None``, use + ``typing.Optional`` as in ``func(x: Optional[list])``. ``None`` is also automatically + allowed when it is used as default argument, i.e. ``func(x: list = None)``. + ``int`` and ``float`` are now also recognised in type annotations and restrict the + value type at runtime. They were previously ignored. + Note that, for backwards compatibility reasons, the new behaviour does not apply when using + Cython's C notation, as in ``func(list x)``. Here, ``None`` is still allowed, as always. + Also, the ``annotation_typing`` directive can now be enabled and disabled more finely + within the module. + (Github issues :issue:`3883`, :issue:`2696`, :issue:`4669`, :issue:`4606`, :issue:`4886`) + +* The compile-time ``DEF`` and ``IF`` statements are deprecated and generate a warning. + They should be replaced with normal constants, code generation or C macros. + (Github issue :issue:`4310`) + +* Reusing an extension type attribute name as a method name is now an error. + Patch by 0dminnimda. (Github issue :issue:`4661`) + +* Improve compatibility between classes pickled in Cython 3.0 and 0.29.x + by accepting MD5, SHA-1 and SHA-256 checksums. + (Github issue :issue:`4680`) + + +3.0.0 alpha 10 (2022-01-06) +=========================== + +Features added +-------------- + +* ``Cython.Distutils.build_ext`` now uses ``cythonize()`` internally (previously + known as ``new_build_ext``), while still supporting the options that were + available in the old implementation (``old_build_ext``). + Patch by Matúš Valo. (Github issue :issue:`3541`) + +* ``pyximport`` now uses ``cythonize()`` internally. + Patch by Matúš Valo. (Github issue :issue:`2304`) + +* ``__del__(self)`` on extension types now maps to ``tp_finalize`` in Python 3. + Original patch by ax487. (Github issue :issue:`3612`) + +* Conversion from Python dict to C++ map now supports arbitrary Python mappings, + not just dicts. + +* Direct assignments to C++ references are now allowed. + Patch by David Woods. (Github issue :issue:`1863`) + +* An initial set of adaptations for GraalVM Python was implemented. Note that + this does not imply any general support for this target or that your code + will work at all in this environment. But testing should be possible now. + Patch by David Woods. (Github issue :issue:`4328`) + +* ``PyMem_[Raw]Calloc()`` was added to the ``cpython.mem`` declarations. + Note that the ``Raw`` versions are no longer #defined by Cython. The previous + macros were not considered safe. + Patch by William Schwartz and David Woods. (Github issue :issue:`3047`) + +Bugs fixed +---------- + +* Circular imports of compiled modules could fail needlessly even when the import + could already be resolved from ``sys.modules``. + Patch by Syam Gadde. (Github issue :issue:`4390`) + +* The GIL can now safely be released inside of ``nogil`` functions (which may actually + be called with the GIL held at runtime). + Patch by David Woods. (Github issue :issue:`4137`) + +* Type errors when passing memory view arguments could leak buffer references. + Patch by David Woods. (Github issue :issue:`4296`) + +* Cython did not type the ``self`` argument in special binary methods. + Patch by David Woods. (Github issue :issue:`4434`) + +* An incompatibility with recent coverage.py versions was resolved. + Patch by David Woods. (Github issue :issue:`4440`) + +* Fused typed default arguments generated incorrect code. + Patch by David Woods. (Github issue :issue:`4413`) + +* ``prange`` loops generated incorrect code when ``cpp_locals`` is enabled. + Patch by David Woods. (Github issue :issue:`4354`) + +* A C-level compatibility issue with recent NumPy versions was resolved. + Patch by David Woods. (Github issue :issue:`4396`) + +* Decorators on inner functions were not evaluated in the right scope. + Patch by David Woods. (Github issue :issue:`4367`) + +* Very early errors during module initialisation could lead to crashes. + Patch by David Woods. (Github issue :issue:`4377`) + +* Fused functions were binding unnecessarily, which prevented them from being pickled. + Patch by David Woods. (Github issue :issue:`4370`) + +* Some constant tuples containing strings were not deduplicated. + Patch by David Woods. (Github issue :issue:`4353`) + +* Unsupported decorators on cdef functions were not rejected in recent releases. + Patch by David Woods. (Github issue :issue:`4322`) + +* The excess arguments in a for-in-range loop with more than 3 arguments to `range()` + were silently ignored. + Original patch by Max Bachmann. (Github issue :issue:`4550`) + +* Python object types were not allowed as ``->`` return type annotations. + Patch by Matúš Valo. (Github issue :issue:`4433`) + +* Default values for memory views arguments were not properly supported. + Patch by Corentin Cadiou. (Github issue :issue:`4313`) + +* Templating C++ classes with memory view types lead to buggy code and is now rejected. + Patch by David Woods. (Github issue :issue:`3085`) + +* Several C++ library declarations were added and fixed. + Patches by Dobatymo, account-login, Jonathan Helgert, Evgeny Yakimov, GalaxySnail, Max Bachmann. + (Github issues :issue:`4408`, :issue:`4419`, :issue:`4410`, :issue:`4395`, + :issue:`4423`, :issue:`4448`, :issue:`4462`, :issue:`3293`, :issue:`4522`, + :issue:`2171`, :issue:`4531`) + +* Some compiler problems and warnings were resolved. + Patches by David Woods, 0dminnimda, Nicolas Pauss and others. + (Github issues :issue:`4317`, :issue:`4324`, :issue:`4361`, :issue:`4357`) + +* The ``self`` argument of static methods in .pxd files was incorrectly typed. + Patch by David Woods. (Github issue :issue:`3174`) + +* A name collision when including multiple generated API header files was resolved. + Patch by David Woods. (Github issue :issue:`4308`) + +* An endless loop in ``cython-mode.el`` was resolved. + Patch by Johannes Mueller. (Github issue :issue:`3218`) + +* ``_Py_TPFLAGS_HAVE_VECTORCALL`` was always set on extension types when using the limited API. + Patch by David Woods. (Github issue :issue:`4453`) + +* Some compatibility issues with PyPy were resolved. + Patches by Max Bachmann, Matti Picus. + (Github issues :issue:`4454`, :issue:`4477`, :issue:`4478`, :issue:`4509`, :issue:`4517`) + +* A compiler crash when running Cython thread-parallel from distutils was resolved. + (Github issue :issue:`4503`) + +* Includes all bug-fixes from the :ref:`0.29.26` release. + +Other changes +------------- + +* A warning was added when ``__defaults__`` or ``__kwdefaults__`` of Cython compiled + functions were re-assigned, since this does not current have an effect. + Patch by David Woods. (Github issue :issue:`2650`) + + +3.0.0 alpha 9 (2021-07-21) +========================== + +Features added +-------------- + +* Declarations for ``libcpp.algorithms``, ``libcpp.set`` and ``libcpp.unordered_set`` + were extended. + Patch by David Woods. (Github issues :issue:`4271`, :issue:`4273`) + +* ``cygdb`` has a new option ``--skip-interpreter`` that allows using a different + Python runtime than the one used to generate the debugging information. + Patch by Alessandro Molina. (Github issue :issue:`4186`) + +Bugs fixed +---------- + +* Several issues with the new ``cpp_locals`` directive were resolved and + its test coverage improved. + Patch by David Woods. (Github issues :issue:`4266`, :issue:`4265`) + +* Generated utility code for C++ conversions no longer depends on several user + definable directives that may make it behave incorrectly. + Patch by David Woods. (Github issue :issue:`4206`) + +* A reference counting bug in the new ``@cython.total_ordering`` decorator was fixed. + +* Includes all bug-fixes from the :ref:`0.29.24` release. + +Other changes +------------- + +* Parts of the documentation were (and are being) rewritten to show the + Cython language syntax next to the equivalent Python syntax. + Patches by 0dminnimda and Matúš Valo. (Github issue :issue:`4187`) + + +3.0.0 alpha 8 (2021-07-02) +========================== + +Features added +-------------- + +* A ``@cython.total_ordering`` decorator has been added to automatically + implement all comparison operators, similar to ``functools.total_ordering``. + Patch by Spencer Brown. (Github issue :issue:`2090`) + +* A new directive ``cpp_locals`` was added that allows local C++ variables to + be lazily initialised (without default constructor), thus making them behave + more like Python variables. + Patch by David Woods. (Github issue :issue:`4160`) + +* C++17 execution policies are supported in ``libcpp.algorithm``. + Patch by Ashwin Srinath. (Github issue :issue:`3790`) + +* New C feature flags: ``CYTHON_USE_MODULE_STATE``, ``CYTHON_USE_TYPE_SPECS`` + Both are currently considered experimental. + (Github issue :issue:`3611`) + +* ``[...] * N`` is optimised for C integer multipliers ``N``. + (Github issue :issue:`3922`) + +Bugs fixed +---------- + +* The dispatch code for binary operators to special methods could run into infinite recursion. + Patch by David Woods. (Github issue :issue:`4172`) + +* Code optimisations were not applied to methods of Cython implemented C++ classes. + Patch by David Woods. (Github issue :issue:`4212`) + +* The special ``cython`` module was not always detected in PEP-484 type annotations. + Patch by David Woods. (Github issue :issue:`4243`) + +* Conversion from Python dicts to ``std::map`` was broken. + Patch by David Woods and Mikkel Skofelt. (Github issues :issue:`4231`, :issue:`4228`) + +* The exception handling annotation ``except +*`` was broken. + Patch by David Woods. (Github issues :issue:`3065`, :issue:`3066`) + +* Attribute annotations in Python classes are now ignored, because they are + just Python objects in a dict (as opposed to the fields of extension types). + Patch by David Woods. (Github issues :issue:`4196`, :issue:`4198`) + +* An unnecessary slow-down at import time was removed from ``Cython.Distutils``. + Original patch by Anthony Sottile. (Github issue :issue:`4224`) + +* Python modules were not automatically recompiled when only their ``.pxd`` file changed. + Patch by Golden Rockefeller. (Github issue :issue:`1428`) + +* The signature of ``PyFloat_FromString()`` in ``cpython.float`` was changed + to match the signature in Py3. It still has an automatic fallback for Py2. + (Github issue :issue:`3909`) + +* A compile error on MSVC was resolved. + Patch by David Woods. (Github issue :issue:`4202`) + +* A C compiler warning in PyPy3 regarding ``PyEval_EvalCode()`` was resolved. + +* Directives starting with ``optimization.*`` in pure Python mode were incorrectly named. + It should have been ``optimize.*``. + Patch by David Woods. (Github issue :issue:`4258`) + +Other changes +------------- + +* Variables can no longer be declared with ``cpdef``. + Patch by David Woods. (Github issue :issue:`887`) + +* Support for the now unsupported Pyston V1 was removed in favour of Pyston V2. + Patch by Marius Wachtler. (Github issue :issue:`4211`) + +* The ``Cython.Build.BuildExecutable`` tool no longer executes the program automatically. + Use ``cythonrun`` for that. + + +3.0.0 alpha 7 (2021-05-24) +========================== + +Features added +-------------- + +* A ``cimport`` is now supported in pure Python code by prefixing the + imported module name with ``cython.cimports.``, e.g. + ``from cython.cimports.libc.math import sin``. + (GIthub issue :issue:`4190`) + +* ``__class_getitem__`` (`PEP-560`_) is supported for cdef classes. + Patch by Kmol Yuan. (Github issue :issue:`3764`) + +* ``__mro_entries__`` (`PEP-560`_) is supported for Python classes. + Patch by David Woods. (Github issue :issue:`3537`) + +* ``cython.array`` supports simple, non-strided views. + (Github issue :issue:`3775`) + +* Self-documenting f-strings (``=``) were implemented. + Patch by davfsa. (Github issue :issue:`3796`) + +* The destructor is now called for fields in C++ structs. + Patch by David Woods. (Github issue :issue:`3226`) + +* ``std::move()`` is now also called for temps during ``yield``. + Patch by Yu Feng. (Github issue :issue:`4154`) + +* ``asyncio.iscoroutinefunction()`` now recognises coroutine functions + also when compiled by Cython. + Patch by Pedro Marques da Luz. (Github issue :issue:`2273`) + +* C compiler warnings and errors are now shown in Jupyter notebooks. + Patch by Egor Dranischnikow. (Github issue :issue:`3751`) + +* ``float(…)`` is optimised for string arguments (str/bytes/bytearray). + +* Converting C++ containers to Python lists uses less memory allocations. + Patch by Max Bachmann. (Github issue :issue:`4081`) + +* Docstrings of ``cpdef`` enums are now copied to the enum class. + Patch by matham. (Github issue :issue:`3805`) + +* The type ``cython.Py_hash_t`` is available in Python mode. + +* C-API declarations for ``cpython.fileobject`` were added. + Patch by Zackery Spytz. (Github issue :issue:`3906`) + +* C-API declarations for context variables in Python 3.7 were added. + Original patch by Zolisa Bleki. (Github issue :issue:`2281`) + +* More C-API declarations for ``cpython.datetime`` were added. + Patch by Bluenix2. (Github issue :issue:`4128`) + +* A new module ``cpython.time`` was added with some low-level alternatives to + Python's ``time`` module. + Patch by Brock Mendel. (Github issue :issue:`3767`) + +* The value ``PyBUF_MAX_NDIM`` was added to the ``cpython.buffer`` module. + Patch by John Kirkham. (Github issue :issue:`3811`) + +* "Declaration after use" is now an error for variables. + Patch by David Woods. (Github issue :issue:`3976`) + +* More declarations for C++ string methods were added. + +* Cython now detects when existing output files were not previously generated + by itself and refuses to overwrite them. It is a common mistake to name + the module file of a wrapper after the library (source file) that it wraps, + which can lead to surprising errors when the file gets overwritten. + +Bugs fixed +---------- + +* Annotations were not exposed on annotated (data-)classes. + Patch by matsjoyce. (Github issue :issue:`4151`) + +* Inline functions and other code in ``.pxd`` files could accidentally + inherit the compiler directives of the ``.pyx`` file that imported them. + Patch by David Woods. (Github issue :issue:`1071`) + +* Some issues were resolved that could lead to duplicated C names. + Patch by David Woods. (Github issue :issue:`3716`, :issue:`3741`, :issue:`3734`) + +* Modules with unicode names failed to build on Windows. + Patch by David Woods. (Github issue :issue:`4125`) + +* ``ndarray.shape`` failed to compile with Pythran and recent NumPy. + Patch by Serge Guelton. (Github issue :issue:`3762`) + +* Casting to ctuples is now allowed. + Patch by David Woods. (Github issue :issue:`3808`) + +* Structs could not be instantiated with positional arguments in + pure Python mode. + +* Literal list assignments to pointer variables declared in PEP-526 + notation failed to compile. + +* Nested C++ types were not usable through ctypedefs. + Patch by Vadim Pushtaev. (Github issue :issue:`4039`) + +* Overloaded C++ static methods were lost. + Patch by Ashwin Srinath. (Github :issue:`1851`) + +* Cython compiled functions always provided a ``__self__`` attribute, + regardless of being used as a method or not. + Patch by David Woods. (Github issue :issue:`4036`) + +* Calls to ``.__class__()`` of a known extension type failed. + Patch by David Woods. (Github issue :issue:`3954`) + +* Generator expressions in pxd-overridden ``cdef`` functions could + fail to compile. + Patch by Matúš Valo. (Github issue :issue:`3477`) + +* A reference leak on import failures was resolved. + Patch by Max Bachmann. (Github issue :issue:`4056`) + +* A C compiler warning about unused code was resolved. + (Github issue :issue:`3763`) + +* A C compiler warning about enum value casting was resolved in GCC. + (Github issue :issue:`2749`) + +* Some C compiler warninge were resolved. + Patches by Max Bachmann. (Github issue :issue:`4053`, :issue:`4059`, :issue:`4054`, :issue:`4148`, :issue:`4162`) + +* A compile failure for C++ enums in Py3.4 / MSVC was resolved. + Patch by Ashwin Srinath. (Github issue :issue:`3782`) + +* Some C++ STL methods did not propagate exceptions. + Patch by Max Bachmann. (Github issue :issue:`4079`) + +* An unsupported C-API call in PyPy was fixed. + Patch by Max Bachmann. (Github issue :issue:`4055`) + +* The Cython ``CodeWriter`` mishandled no-argument ``return`` statements. + Patch by Tao He. (Github issue :issue:`3795`) + +* ``complex`` wasn't supported in PEP-484 type annotations. + Patch by David Woods. (Github issue :issue:`3949`) + +* Default arguments of methods were not exposed for introspection. + Patch by Vladimir Matveev. (Github issue :issue:`4061`) + +* Extension types inheriting from Python classes could not safely + be exposed in ``.pxd`` files. + (Github issue :issue:`4106`) + +* The profiling/tracing code was adapted to work with Python 3.10b1. + +* The internal CPython macro ``Py_ISSPACE()`` is no longer used. + Original patch by Andrew Jones. (Github issue :issue:`4111`) + +* Includes all bug-fixes from the :ref:`0.29.23` release. + + +3.0.0 alpha 6 (2020-07-31) +========================== + +Features added +-------------- + +* Special methods for binary operators now follow Python semantics. + Rather than e.g. a single ``__add__`` method for cdef classes, where + "self" can be either the first or second argument, one can now define + both ``__add__`` and ``__radd__`` as for standard Python classes. + This behavior can be disabled with the ``c_api_binop_methods`` directive + to return to the previous semantics in Cython code (available from Cython + 0.29.20), or the reversed method (``__radd__``) can be implemented in + addition to an existing two-sided operator method (``__add__``) to get a + backwards compatible implementation. + (Github issue :issue:`2056`) + +* No/single argument functions now accept keyword arguments by default in order + to comply with Python semantics. The marginally faster calling conventions + ``METH_NOARGS`` and ``METH_O`` that reject keyword arguments are still available + with the directive ``@cython.always_allow_keywords(False)``. + (Github issue :issue:`3090`) + +* For-in-loop iteration over ``bytearray`` and memory views is optimised. + Patch by David Woods. (Github issue :issue:`2227`) + +* Type inference now works for memory views and slices. + Patch by David Woods. (Github issue :issue:`2227`) + +* The ``@returns()`` decorator propagates exceptions by default for suitable C + return types when no ``@exceptval()`` is defined. + (Github issues :issue:`3625`, :issue:`3664`) + +* A low-level inline function ``total_seconds(timedelta)`` was added to + ``cpython.datetime`` to bypass the Python method call. Note that this function + is not guaranteed to give exactly the same results for very large time intervals. + Patch by Brock Mendel. (Github issue :issue:`3616`) + +* Type inference now understands that ``a, *b = x`` assigns a list to ``b``. + +* Limited API support was improved. + Patches by Matthias Braun. (Github issues :issue:`3693`, :issue:`3707`) + +* The Cython ``CodeWriter`` can now handle more syntax constructs. + Patch by Tao He. (Github issue :issue:`3514`) + +Bugs fixed +---------- + +* The construct ``for x in cpp_function_call()`` failed to compile. + Patch by David Woods. (Github issue :issue:`3663`) + +* C++ references failed to compile when used as Python object indexes. + Patch by David Woods. (Github issue :issue:`3754`) + +* The C++ ``typeid()`` function was allowed in C mode. + Patch by Celelibi. (Github issue :issue:`3637`) + +* ``repr()`` was assumed to return ``str`` instead of ``unicode`` with ``language_level=3``. + (Github issue :issue:`3736`) + +* Includes all bug-fixes from the :ref:`0.29.21` release. + +Other changes +------------- + +* The ``numpy`` declarations were updated. + Patch by Brock Mendel. (Github issue :issue:`3630`) + +* The names of Cython's internal types (functions, generator, coroutine, etc.) + are now qualified with the module name of the internal Cython module that is + used for sharing them across Cython implemented modules, for example + ``_cython_3_0a5.coroutine``. This was done to avoid making them look like + homeless builtins, to help with debugging, and in order to avoid a CPython + warning according to https://bugs.python.org/issue20204 + +3.0.0 alpha 5 (2020-05-19) +========================== + +Features added +-------------- + +* ``.pxd`` files can now be :ref:`versioned <versioning>` by adding an + extension like "``.cython-30.pxd``" to prevent older Cython versions (than + 3.0 in this case) from picking them up. (Github issue :issue:`3577`) + +* Several macros/functions declared in the NumPy API are now usable without + holding the GIL. + +* `libc.math` was extended to include all C99 function declarations. + Patch by Dean Scarff. (Github issue :issue:`3570`) + +Bugs fixed +---------- + +* Several issues with arithmetic overflow handling were resolved, including + undefined behaviour in C. + Patch by Sam Sneddon. (Github issue :issue:`3588`) + +* The improved GIL handling in ``nogil`` functions introduced in 3.0a3 + could fail to acquire the GIL in some cases on function exit. + (Github issue :issue:`3590` etc.) + +* A reference leak when processing keyword arguments in Py2 was resolved, + that appeared in 3.0a1. + (Github issue :issue:`3578`) + +* The outdated getbuffer/releasebuffer implementations in the NumPy + declarations were removed so that buffers declared as ``ndarray`` + now use the normal implementation in NumPy. + +* Includes all bug-fixes from the :ref:`0.29.18` release. + + +3.0.0 alpha 4 (2020-05-05) +========================== + +Features added +-------------- + +* The ``print`` statement (not the ``print()`` function) is allowed in + ``nogil`` code without an explicit ``with gil`` section. + +* The ``assert`` statement is allowed in ``nogil`` sections. Here, the GIL is + only acquired if the ``AssertionError`` is really raised, which means that the + evaluation of the asserted condition only allows C expressions. + +* Cython generates C compiler branch hints for unlikely user defined if-clauses + in more cases, when they end up raising exceptions unconditionally. This now + includes exceptions being raised in ``nogil``/``with gil`` sections. + +* Some internal memoryview functions were tuned to reduce object overhead. + +Bugs fixed +---------- + +* Exception position reporting could run into race conditions on threaded code. + It now uses function-local variables again. + +* Error handling early in the module init code could lead to a crash. + +* Error handling in ``cython.array`` creation was improved to avoid calling + C-API functions with an error held. + +* Complex buffer item types of structs of arrays could fail to validate. + Patch by Leo and smutch. (Github issue :issue:`1407`) + +* When importing the old Cython ``build_ext`` integration with distutils, the + additional command line arguments leaked into the regular command. + Patch by Kamekameha. (Github issue :issue:`2209`) + +* The improved GIL handling in ``nogil`` functions introduced in 3.0a3 + could generate invalid C code. + (Github issue :issue:`3558`) + +* ``PyEval_InitThreads()`` is no longer used in Py3.7+ where it is a no-op. + +* Parallel builds of Cython itself (``setup.py build_ext -j N``) failed on Windows. + +Other changes +------------- + +* The C property feature has been rewritten and now requires C property methods + to be declared ``inline`` (:issue:`3571`). + + +3.0.0 alpha 3 (2020-04-27) +========================== + +Features added +-------------- + +* ``nogil`` functions now avoid acquiring the GIL on function exit if possible + even if they contain ``with gil`` blocks. + (Github issue :issue:`3554`) + +* Python private name mangling now falls back to unmangled names for non-Python + globals, since double-underscore names are not uncommon in C. Unmangled Python + names are also still found as a legacy fallback but produce a warning. + Patch by David Woods. (Github issue :issue:`3548`) + +Bugs fixed +---------- + +* Includes all bug-fixes from the :ref:`0.29.17` release. + + +3.0.0 alpha 2 (2020-04-23) +========================== + +Features added +-------------- + +* ``std::move()`` is now used in C++ mode for internal temp variables to + make them work without copying values. + Patch by David Woods. (Github issues :issue:`3253`, :issue:`1612`) + +* ``__class_getitem__`` is supported for types on item access (`PEP-560`_). + Patch by msg555. (Github issue :issue:`2753`) + +* The simplified Py3.6 customisation of class creation is implemented (`PEP-487`_). + (Github issue :issue:`2781`) + +* Conditional blocks in Python code that depend on ``cython.compiled`` are + eliminated at an earlier stage, which gives more freedom in writing + replacement Python code. + Patch by David Woods. (Github issue :issue:`3507`) + +* ``numpy.import_array()`` is automatically called if ``numpy`` has been cimported + and it has not been called in the module code. This is intended as a hidden + fail-safe so user code should continue to call ``numpy.import_array``. + Patch by David Woods. (Github issue :issue:`3524`) + +* The Cython AST code serialiser class ``CodeWriter`` in ``Cython.CodeWriter`` + supports more syntax nodes. + +* The fastcall/vectorcall protocols are used for several internal Python calls. + (Github issue :issue:`3540`) + +Bugs fixed +---------- + +* With ``language_level=3/3str``, Python classes without explicit base class + are now new-style (type) classes also in Py2. Previously, they were created + as old-style (non-type) classes. + (Github issue :issue:`3530`) + +* C++ ``typeid()`` failed for fused types. + Patch by David Woods. (Github issue :issue:`3203`) + +* ``__arg`` argument names in methods were not mangled with the class name. + Patch by David Woods. (Github issue :issue:`1382`) + +* Creating an empty unicode slice with large bounds could crash. + Patch by Sam Sneddon. (Github issue :issue:`3531`) + +* Decoding an empty bytes/char* slice with large bounds could crash. + Patch by Sam Sneddon. (Github issue :issue:`3534`) + +* Temporary buffer indexing variables were not released and could show up in + C compiler warnings, e.g. in generators. + Patch by David Woods. (Github issues :issue:`3430`, :issue:`3522`) + +* Several C compiler warnings were fixed. + + +3.0.0 alpha 1 (2020-04-12) +========================== + +Features added +-------------- + +* Cython functions now use the `PEP-590`_ vectorcall protocol in Py3.7+. + Patch by Jeroen Demeyer. (Github issue :issue:`2263`) + +* Unicode identifiers are supported in Cython code (`PEP-3131`_). + Patch by David Woods. (Github issue :issue:`2601`) + +* Unicode module names and imports are supported. + Patch by David Woods. (Github issue :issue:`3119`) + +* Annotations are no longer parsed, keeping them as strings following `PEP-563`_. + Patch by David Woods. (Github issue :issue:`3285`) + +* Preliminary support for the CPython's ``Py_LIMITED_API`` (stable ABI) is + available by setting the ``CYTHON_LIMITED_API`` C macro. Note that the + support is currently in an early stage and many features do not yet work. + You currently still have to define ``Py_LIMITED_API`` externally in order + to restrict the API usage. This will change when the feature stabilises. + Patches by Eddie Elizondo and David Woods. (Github issues :issue:`3223`, + :issue:`3311`, :issue:`3501`) + +* The dispatch to fused functions is now linear in the number of arguments, + which makes it much faster, often 2x or more, and several times faster for + larger fused types with many specialisations. + Patch by will-ca. (Github issue :issue:`1385`) + +* ``with gil/nogil`` statements can be conditional based on compile-time + constants, e.g. fused type checks. + Patch by Noam Hershtig. (Github issue :issue:`2579`) + +* ``const`` can be used together with fused types. + Patch by Thomas Vincent. (Github issue :issue:`1772`) + +* Reimports of already imported modules are substantially faster. + (Github issue :issue:`2854`) + +* Positional-only arguments are supported in Python functions (`PEP-570`_). + Patch by Josh Tobin. (Github issue :issue:`2915`) + +* The ``volatile`` C modifier is supported in Cython code. + Patch by Jeroen Demeyer. (Github issue :issue:`1667`) + +* ``@cython.trashcan(True)`` can be used on an extension type to enable the + CPython :ref:`trashcan`. This allows deallocating deeply recursive objects + without overflowing the stack. Patch by Jeroen Demeyer. (Github issue :issue:`2842`) + +* Inlined properties can be defined for external extension types. + Patch by Matti Picus. (Github issue :issue:`2640`, redone later in :issue:`3571`) + +* The ``str()`` builtin now calls ``PyObject_Str()`` instead of going + through a Python call. + Patch by William Ayd. (Github issue :issue:`3279`) + +* String concatenation can now happen in place if possible, by extending the + existing string rather than always creating a new one. + Patch by David Woods. (Github issue :issue:`3453`) + +* Multiplication of Python numbers with small constant integers is faster. + (Github issue :issue:`2808`) + +* Some list copying is avoided internally when a new list needs to be created + but we already have a fresh one. + (Github issue :issue:`3494`) + +* Extension types that do not need their own ``tp_new`` implementation (because + they have no object attributes etc.) directly inherit the implementation of + their parent type if possible. + (Github issue :issue:`1555`) + +* The attributes ``gen.gi_frame`` and ``coro.cr_frame`` of Cython compiled + generators and coroutines now return an actual frame object for introspection. + (Github issue :issue:`2306`) + +* Several declarations in ``cpython.*``, ``libc.*`` and ``libcpp.*`` were added. + Patches by Jeroen Demeyer, Matthew Edwards, Chris Gyurgyik, Jerome Kieffer + and Zackery Spytz. + (Github issues :issue:`3468`, :issue:`3332`, :issue:`3202`, :issue:`3188`, + :issue:`3179`, :issue:`2891`, :issue:`2826`, :issue:`2713`) + +* Deprecated NumPy API usages were removed from ``numpy.pxd``. + Patch by Matti Picus. (Github issue :issue:`3365`) + +* ``cython.inline()`` now sets the ``NPY_NO_DEPRECATED_API=NPY_1_7_API_VERSION`` + C macro automatically when ``numpy`` is imported in the code, to avoid C compiler + warnings about deprecated NumPy C-API usage. + +* The builtin ``abs()`` function can now be used on C numbers in nogil code. + Patch by Elliott Sales de Andrade. (Github issue :issue:`2748`) + +* `PEP-479`_ (``generator_stop``) is now enabled by default with language level 3. + (Github issue :issue:`2580`) + +* The ``cython.view.array`` type supports inheritance. + Patch by David Woods. (Github issue :issue:`3413`) + +* Code annotation accepts a new debugging argument ``--annotate-fullc`` that + will include the complete syntax highlighted C file in the HTML output. + (Github issue :issue:`2855`) + +* ``--no-capture`` added to ``runtests.py`` to prevent stdout/stderr capturing + during srctree tests. + Patch by Matti Picus. (Github issue :issue:`2701`) + +* ``--no-docstrings`` option added to ``cythonize`` script. + Original patch by mo-han. (Github issue :issue:`2889`) + +* ``cygdb`` gives better error messages when it fails to initialise the + Python runtime support in gdb. + Patch by Volker Weissmann. (Github issue :issue:`3489`) + +* The Pythran ``shape`` attribute is supported. + Patch by Serge Guelton. (Github issue :issue:`3307`) + +Bugs fixed +---------- + +* The unicode methods ``.upper()``, ``.lower()`` and ``.title()`` were + incorrectly optimised for single character input values and only returned + the first character if multiple characters should have been returned. + They now use the original Python methods again. + +* Fused argument types were not correctly handled in type annotations and + ``cython.locals()``. + Patch by David Woods. (Github issues :issue:`3391`, :issue:`3142`) + +* Diverging from the usual behaviour, ``len(memoryview)``, ``len(char*)`` + and ``len(Py_UNICODE*)`` returned an unsigned ``size_t`` value. They now + return a signed ``Py_ssize_t``, like other usages of ``len()``. + +* Nested dict literals in function call kwargs could incorrectly raise an + error about duplicate keyword arguments, which are allowed when passing + them from dict literals. + (Github issue :issue:`2963`) + +* Item access (subscripting) with integer indices/keys always tried the + Sequence protocol before the Mapping protocol, which diverged from Python + semantics. It now passes through the Mapping protocol first when supported. + (Github issue :issue:`1807`) + +* Name lookups in class bodies no longer go through an attribute lookup. + Patch by Jeroen Demeyer. (Github issue :issue:`3100`) + +* Broadcast assignments to a multi-dimensional memory view slice could end + up in the wrong places when the underlying memory view is known to be + contiguous but the slice is not. + (Github issue :issue:`2941`) + +* Pickling unbound methods of Python classes failed. + Patch by Pierre Glaser. (Github issue :issue:`2972`) + +* The ``Py_hash_t`` type failed to accept arbitrary "index" values. + (Github issue :issue:`2752`) + +* The first function line number of functions with decorators pointed to the + signature line and not the first decorator line, as in Python. + Patch by Felix Kohlgrüber. (Github issue :issue:`2536`) + +* Constant integer expressions that used a negative exponent were evaluated + as integer 0 instead of the expected float value. + Patch by Kryštof Pilnáček. (Github issue :issue:`2133`) + +* The ``cython.declare()`` and ``cython.cast()`` functions could fail in pure mode. + Patch by Dmitry Shesterkin. (Github issue :issue:`3244`) + +* ``__doc__`` was not available inside of the class body during class creation. + (Github issue :issue:`1635`) + +* Setting ``language_level=2`` in a file did not work if ``language_level=3`` + was enabled globally before. + Patch by Jeroen Demeyer. (Github issue :issue:`2791`) + +* ``__init__.pyx`` files were not always considered as package indicators. + (Github issue :issue:`2665`) + +* Compiling package ``__init__`` files could fail under Windows due to an + undefined export symbol. (Github issue :issue:`2968`) + +* A C compiler cast warning was resolved. + Patch by Michael Buesch. (Github issue :issue:`2775`) + +* Binding staticmethods of Cython functions were not behaving like Python methods. + Patch by Jeroen Demeyer. (Github issue :issue:`3106`, :issue:`3102`) + +* Memoryviews failed to compile when the ``cache_builtins`` feature was disabled. + Patch by David Woods. (Github issue :issue:`3406`) + +Other changes +------------- + +* The default language level was changed to ``3str``, i.e. Python 3 semantics, + but with ``str`` literals (also in Python 2.7). This is a backwards incompatible + change from the previous default of Python 2 semantics. The previous behaviour + is available through the directive ``language_level=2``. + (Github issue :issue:`2565`) + +* Cython no longer generates ``__qualname__`` attributes for classes in Python + 2.x since they are problematic there and not correctly maintained for subclasses. + Patch by Jeroen Demeyer. (Github issue :issue:`2772`) + +* Source file fingerprinting now uses SHA-1 instead of MD5 since the latter + tends to be slower and less widely supported these days. + (Github issue :issue:`2790`) + +* The long deprecated include files ``python_*``, ``stdio``, ``stdlib`` and + ``stl`` in ``Cython/Includes/Deprecated/`` were removed. Use the ``libc.*`` + and ``cpython.*`` pxd modules instead. + Patch by Jeroen Demeyer. (Github issue :issue:`2904`) + +* The search order for include files was changed. Previously it was + ``include_directories``, ``Cython/Includes``, ``sys.path``. Now it is + ``include_directories``, ``sys.path``, ``Cython/Includes``. This was done to + allow third-party ``*.pxd`` files to override the ones in Cython. + Patch by Matti Picus. (Github issue :issue:`2905`) + +* The command line parser was rewritten and modernised using ``argparse``. + Patch by Egor Dranischnikow. (Github issue :issue:`2952`, :issue:`3001`) + +* Dotted filenames for qualified module names (``pkg.mod.pyx``) are deprecated. + Use the normal Python package directory layout instead. + (Github issue :issue:`2686`) + +* Binary Linux wheels now follow the manylinux2010 standard. + Patch by Alexey Stepanov. (Github issue :issue:`3355`) + +* Support for Python 2.6 was removed. + +.. _`PEP-560`: https://www.python.org/dev/peps/pep-0560 +.. _`PEP-570`: https://www.python.org/dev/peps/pep-0570 +.. _`PEP-487`: https://www.python.org/dev/peps/pep-0487 +.. _`PEP-590`: https://www.python.org/dev/peps/pep-0590 +.. _`PEP-3131`: https://www.python.org/dev/peps/pep-3131 +.. _`PEP-563`: https://www.python.org/dev/peps/pep-0563 +.. _`PEP-479`: https://www.python.org/dev/peps/pep-0479 + + +.. _0.29.35: + 0.29.35 (2023-??-??) ==================== @@ -24,6 +1428,8 @@ Bugs fixed Patch by Lisandro Dalcin. (Github issue :issue:`5355`) +.. _0.29.34: + 0.29.34 (2023-04-02) ==================== @@ -43,6 +1449,8 @@ Bugs fixed Patches by Eli Schwartz. (Github issues :issue:`5279`, :issue:`5291`) +.. _0.29.33: + 0.29.33 (2023-01-06) ==================== @@ -102,6 +1510,8 @@ Other changes (Github issue :issue:`5016`) +.. _0.29.32: + 0.29.32 (2022-07-29) ==================== @@ -109,11 +1519,13 @@ Bugs fixed ---------- * Revert "Using memoryview typed arguments in inner functions is now rejected as unsupported." - Patch by David Woods. (Github issue #4798) + Patch by David Woods. (Github issue :issue:`4798`) * ``from module import *`` failed in 0.29.31 when using memoryviews. - Patch by David Woods. (Github issue #4927) + Patch by David Woods. (Github issue :issue:`4927`) + +.. _0.29.31: 0.29.31 (2022-07-27) ==================== @@ -123,57 +1535,59 @@ Features added * A new argument ``--module-name`` was added to the ``cython`` command to provide the (one) exact target module name from the command line. - Patch by Matthew Brett and h-vetinari. (Github issue #4906) - + Patch by Matthew Brett and h-vetinari. (Github issue :issue:`4906`) + * A new keyword ``noexcept`` was added for forward compatibility with Cython 3. - Patch by David Woods. (Github issue #4903) + Patch by David Woods. (Github issue :issue:`4903`) Bugs fixed ---------- * Use ``importlib.util.find_spec()`` instead of the deprecated ``importlib.find_loader()`` function when setting up the package path at import-time. - Patch by Matti Picus. (Github issue #4764) + Patch by Matti Picus. (Github issue :issue:`4764`) * Require the C compiler to support the two-arg form of ``va_start`` on Python 3.10 and higher. - Patch by Thomas Caswell. (Github issue #4820) + Patch by Thomas Caswell. (Github issue :issue:`4820`) * Make ``fused_type`` subscriptable in Shadow.py. - Patch by Pfebrer. (Github issue #4842) + Patch by Pfebrer. (Github issue :issue:`4842`) * Fix the incorrect code generation of the target type in ``bytearray`` loops. - Patch by Kenrick Everett. (Github issue #4108) + Patch by Kenrick Everett. (Github issue :issue:`4108`) * Atomic refcounts for memoryviews were not used on some GCC versions by accident. - Patch by Sam Gross. (Github issue #4915) + Patch by Sam Gross. (Github issue :issue:`4915`) * Silence some GCC ``-Wconversion`` warnings in C utility code. - Patch by Lisandro Dalcin. (Github issue #4854) + Patch by Lisandro Dalcin. (Github issue :issue:`4854`) * Tuple multiplication was ignored in expressions such as ``[*(1,) * 2]``. - Patch by David Woods. (Github issue #4864) + Patch by David Woods. (Github issue :issue:`4864`) * Calling ``append`` methods on extension types could fail to find the method in some cases. - Patch by David Woods. (Github issue #4828) + Patch by David Woods. (Github issue :issue:`4828`) * Ensure that object buffers (e.g. ``ndarray[object, ndim=1]``) containing ``NULL`` pointers are safe to use, returning ``None`` instead of the ``NULL`` pointer. - Patch by Sebastian Berg. (Github issue #4859) + Patch by Sebastian Berg. (Github issue :issue:`4859`) * Using memoryview typed arguments in inner functions is now rejected as unsupported. - Patch by David Woods. (Github issue #4798) + Patch by David Woods. (Github issue :issue:`4798`) * Compilation could fail on systems (e.g. FIPS) that block MD5 checksums at runtime. - (Github issue #4909) + (Github issue :issue:`4909`) * Experimental adaptations for the CPython "nogil" fork was added. Note that there is no official support for this in Cython 0.x. - Patch by Sam Gross. (Github issue #4912) + Patch by Sam Gross. (Github issue :issue:`4912`) +.. _0.29.30: + 0.29.30 (2022-05-16) ==================== @@ -182,8 +1596,10 @@ Bugs fixed * The GIL handling changes in 0.29.29 introduced a regression where objects could be deallocated without holding the GIL. - (Github issue #4796) + (Github issue :issue:`4796`) + +.. _0.29.29: 0.29.29 (2022-05-16) ==================== @@ -194,45 +1610,48 @@ Features added * Avoid acquiring the GIL at the end of nogil functions. This change was backported in order to avoid generating wrong C code that would trigger C compiler warnings with tracing support enabled. - Backport by Oleksandr Pavlyk. (Github issue #4637) + Backport by Oleksandr Pavlyk. (Github issue :issue:`4637`) Bugs fixed ---------- * Function definitions in ``finally:`` clauses were not correctly generated. - Patch by David Woods. (Github issue #4651) + Patch by David Woods. (Github issue :issue:`4651`) * A case where C-API functions could be called with a live exception set was fixed. - Patch by Jakub Kulík. (Github issue #4722) + Patch by Jakub Kulík. (Github issue :issue:`4722`) * Pickles can now be exchanged again with those generated from Cython 3.0 modules. - (Github issue #4680) + (Github issue :issue:`4680`) * Cython now correctly generates Python methods for both the provided regular and reversed special numeric methods of extension types. - Patch by David Woods. (Github issue #4750) + Patch by David Woods. (Github issue :issue:`4750`) * Calling unbound extension type methods without arguments could raise an ``IndexError`` instead of a ``TypeError``. - Patch by David Woods. (Github issue #4779) + Patch by David Woods. (Github issue :issue:`4779`) * Calling unbound ``.__contains__()`` super class methods on some builtin base types could trigger an infinite recursion. - Patch by David Woods. (Github issue #4785) + Patch by David Woods. (Github issue :issue:`4785`) * The C union type in pure Python mode mishandled some field names. - Patch by Jordan Brière. (Github issue #4727) + Patch by Jordan Brière. (Github issue :issue:`4727`) * Allow users to overwrite the C macro ``_USE_MATH_DEFINES``. - Patch by Yuriy Chernyshov. (Github issue #4690) + Patch by Yuriy Chernyshov. (Github issue :issue:`4690`) * Improved compatibility with CPython 3.10/11. - Patches by Thomas Caswell, David Woods. (Github issues #4609, #4667, #4721, #4730, #4777) + Patches by Thomas Caswell, David Woods. + (Github issues :issue:`4609`, :issue:`4667`, :issue:`4721`, :issue:`4730`, :issue:`4777`) * Docstrings of descriptors are now provided in PyPy 7.3.9. - Patch by Matti Picus. (Github issue #4701) + Patch by Matti Picus. (Github issue :issue:`4701`) +.. _0.29.28: + 0.29.28 (2022-02-17) ==================== @@ -242,11 +1661,13 @@ Bugs fixed * Due to backwards incompatible changes in CPython 3.11a4, the feature flags ``CYTHON_FAST_THREAD_STATE`` and ``CYTHON_USE_EXC_INFO_STACK`` are now disabled in Python 3.11 and later. They are enabled again in Cython 3.0. - Patch by David Woods. (Github issue #4610) + Patch by David Woods. (Github issue :issue:`4610`) * A C compiler warning in older PyPy versions was resolved. - Patch by Matti Picus. (Github issue #4236) + Patch by Matti Picus. (Github issue :issue:`4236`) + +.. _0.29.27: 0.29.27 (2022-01-28) ==================== @@ -257,16 +1678,16 @@ Features added * The ``cythonize`` command has a new option ``-M`` to generate ``.dep`` dependency files for the compilation unit. This can be used by external build tools to track these dependencies. - Patch by Evgeni Burovski. (Github issue #1214) + Patch by Evgeni Burovski. (Github issue :issue:`1214`) Bugs fixed ---------- * Compilation failures on PyPy were resolved. - Patches by Matti Picus. (Github issues #4509, #4517) + Patches by Matti Picus. (Github issues :issue:`4509`, :issue:`4517`) * Calls to ``range()`` with more than three arguments did not fail. - Original patch by Max Bachmann. (Github issue #4550) + Original patch by Max Bachmann. (Github issue :issue:`4550`) * Some C compiler warnings about missing type struct initialisers in Py3.10 were resolved. @@ -274,6 +1695,8 @@ Bugs fixed considered generally available. +.. _0.29.26: + 0.29.26 (2021-12-16) ==================== @@ -281,14 +1704,16 @@ Bugs fixed ---------- * An incompatibility with CPython 3.11.0a3 was resolved. - (Github issue #4499) + (Github issue :issue:`4499`) * The ``in`` operator failed on literal lists with starred expressions. - Patch by Arvind Natarajan. (Github issue #3938) + Patch by Arvind Natarajan. (Github issue :issue:`3938`) * A C compiler warning in PyPy about a missing struct field initialisation was resolved. +.. _0.29.25: + 0.29.25 (2021-12-06) ==================== @@ -297,27 +1722,30 @@ Bugs fixed * Several incompatibilities with CPython 3.11 were resolved. Patches by David Woods, Victor Stinner, Thomas Caswell. - (Github issues #4411, #4414, #4415, #4416, #4420, #4428, #4473, #4479, #4480) + (Github issues :issue:`4411`, :issue:`4414`, :issue:`4415`, :issue:`4416`, :issue:`4420`, + :issue:`4428`, :issue:`4473`, :issue:`4479`, :issue:`4480`) * Some C compiler warnings were resolved. - Patches by Lisandro Dalcin and others. (Github issue #4439) + Patches by Lisandro Dalcin and others. (Github issue :issue:`4439`) * C++ ``std::move()`` should only be used automatically in MSVC versions that support it. - Patch by Max Bachmann. (Github issue #4191) + Patch by Max Bachmann. (Github issue :issue:`4191`) * The ``Py_hash_t`` type failed to accept arbitrary "index" values. - (Github issue #2752) + (Github issue :issue:`2752`) * Avoid copying unaligned 16-bit values since some platforms require them to be aligned. Use memcpy() instead to let the C compiler decide how to do it. - (Github issue #4343) + (Github issue :issue:`4343`) * Cython crashed on invalid truthiness tests on C++ types without ``operator bool``. - Patch by David Woods. (Github issue #4348) + Patch by David Woods. (Github issue :issue:`4348`) * The declaration of ``PyUnicode_CompareWithASCIIString()`` in ``cpython.unicode`` was incorrect. - Patch by Max Bachmann. (Github issue #4344) + Patch by Max Bachmann. (Github issue :issue:`4344`) + +.. _0.29.24: 0.29.24 (2021-07-14) ==================== @@ -327,33 +1755,35 @@ Bugs fixed * Inline functions in pxd files that used memory views could lead to invalid C code if the module that imported from them does not use memory views. - Patch by David Woods. (Github issue #1415) + Patch by David Woods. (Github issue :issue:`1415`) * Several declarations in ``libcpp.string`` were added and corrected. - Patch by Janek Bevendorff. (Github issue #4268) + Patch by Janek Bevendorff. (Github issue :issue:`4268`) * Pickling unbound Cython compiled methods failed. - Patch by Pierre Glaser. (Github issue #2972) + Patch by Pierre Glaser. (Github issue :issue:`2972`) * The tracing code was adapted to work with CPython 3.10. * The optimised ``in`` operator failed on unicode strings in Py3.9 and later that were constructed from an external ``wchar_t`` source. Also, related C compiler warnings about deprecated C-API usage were resolved. - (Github issue #3925) + (Github issue :issue:`3925`) * Some compiler crashes were resolved. - Patch by David Woods. (Github issues #4214, #2811) + Patch by David Woods. (Github issues :issue:`4214`, :issue:`2811`) * An incorrect warning about 'unused' generator expressions was removed. - (GIthub issue #1699) + (GIthub issue :issue:`1699`) * The attributes ``gen.gi_frame`` and ``coro.cr_frame`` of Cython compiled generators and coroutines now return an actual frame object for introspection, instead of ``None``. - (Github issue #2306) + (Github issue :issue:`2306`) +.. _0.29.23: + 0.29.23 (2021-04-14) ==================== @@ -361,18 +1791,20 @@ Bugs fixed ---------- * Some problems with Python 3.10 were resolved. - Patches by Victor Stinner and David Woods. (Github issues #4046, #4100) + Patches by Victor Stinner and David Woods. (Github issues :issue:`4046`, :issue:`4100`) * An incorrect "optimisation" was removed that allowed changes to a keyword dict to leak into keyword arguments passed into a function. - Patch by Peng Weikang. (Github issue #3227) + Patch by Peng Weikang. (Github issue :issue:`3227`) * Multiplied str constants could end up as bytes constants with language_level=2. - Patch by Alphadelta14 and David Woods. (Github issue #3951) + Patch by Alphadelta14 and David Woods. (Github issue :issue:`3951`) * ``PY_SSIZE_T_CLEAN`` does not get defined any more if it is already defined. - Patch by Andrew Jones. (Github issue #4104) + Patch by Andrew Jones. (Github issue :issue:`4104`) + +.. _0.29.22: 0.29.22 (2021-02-20) ==================== @@ -382,41 +1814,41 @@ Features added * Some declarations were added to the provided pxd includes. Patches by Zackery Spytz and John Kirkham. - (Github issues #3811, #3882, #3899, #3901) + (Github issues :issue:`3811`, :issue:`3882`, :issue:`3899`, :issue:`3901`) Bugs fixed ---------- * A crash when calling certain functions in Py3.9 and later was resolved. - (Github issue #3917) + (Github issue :issue:`3917`) * ``const`` memory views of structs failed to compile. - (Github issue #2251) + (Github issue :issue:`2251`) * ``const`` template declarations could not be nested. - Patch by Ashwin Srinath. (Github issue #1355) + Patch by Ashwin Srinath. (Github issue :issue:`1355`) * The declarations in the ``cpython.pycapsule`` module were missing their ``const`` modifiers and generated incorrect C code. - Patch by Warren Weckesser. (Github issue #3964) + Patch by Warren Weckesser. (Github issue :issue:`3964`) * Casts to memory views failed for fused dtypes. - Patch by David Woods. (Github issue #3881) + Patch by David Woods. (Github issue :issue:`3881`) * ``repr()`` was assumed to return ``str`` instead of ``unicode`` with ``language_level=3``. - (Github issue #3736) + (Github issue :issue:`3736`) * Calling ``cpdef`` functions from cimported modules crashed the compiler. - Patch by David Woods. (Github issue #4000) + Patch by David Woods. (Github issue :issue:`4000`) * Cython no longer validates the ABI size of the NumPy classes it compiled against. See the discussion in https://github.com/numpy/numpy/pull/432 * A C compiler warning about enum value casting was resolved in GCC. - (Github issue #2749) + (Github issue :issue:`2749`) * Coverage reporting in the annotated HTML file failed in Py3.9. - Patch by Nick Pope. (Github issue #3865) + Patch by Nick Pope. (Github issue :issue:`3865`) * The embedding code now reports Python errors as exit status. @@ -428,9 +1860,11 @@ Other changes * Variables defined as ``cpdef`` now generate a warning since this is currently useless and thus does not do what users would expect. - Patch by David Woods. (Github issue #3959) + Patch by David Woods. (Github issue :issue:`3959`) +.. _0.29.21: + 0.29.21 (2020-07-09) ==================== @@ -438,38 +1872,41 @@ Bugs fixed ---------- * Fix a regression in 0.29.20 where ``__div__`` failed to be found in extension types. - (Github issue #3688) + (Github issue :issue:`3688`) * Fix a regression in 0.29.20 where a call inside of a finally clause could fail to compile. - Patch by David Woods. (Github issue #3712) + Patch by David Woods. (Github issue :issue:`3712`) * Zero-sized buffers could fail to validate as C/Fortran-contiguous. - Patch by Clemens Hofreither. (Github issue #2093) + Patch by Clemens Hofreither. (Github issue :issue:`2093`) * ``exec()`` did not allow recent Python syntax features in Py3.8+ due to https://bugs.python.org/issue35975. - (Github issue #3695) + (Github issue :issue:`3695`) * Binding staticmethods of Cython functions were not behaving like Python methods in Py3. - Patch by Jeroen Demeyer and Michał Górny. (Github issue #3106) + Patch by Jeroen Demeyer and Michał Górny. (Github issue :issue:`3106`) * Pythran calls to NumPy methods no longer generate useless method lookup code. * The ``PyUnicode_GET_LENGTH()`` macro was missing from the ``cpython.*`` declarations. - Patch by Thomas Caswell. (Github issue #3692) + Patch by Thomas Caswell. (Github issue :issue:`3692`) * The deprecated ``PyUnicode_*()`` C-API functions are no longer used, except for Unicode strings that contain lone surrogates. Unicode strings that contain non-BMP characters or surrogate pairs now generate different C code on 16-bit Python 2.x Unicode deployments (such as MS-Windows). Generating the C code on Python 3.x is recommended in this case. - Original patches by Inada Naoki and Victor Stinner. (Github issues #3677, #3721, #3697) + Original patches by Inada Naoki and Victor Stinner. + (Github issues :issue:`3677`, :issue:`3721`, :issue:`3697`) * Some template parameters were missing from the C++ ``std::unordered_map`` declaration. - Patch by will. (Github issue #3685) + Patch by will. (Github issue :issue:`3685`) * Several internal code generation issues regarding temporary variables were resolved. - (Github issue #3708) + (Github issue :issue:`3708`) + +.. _0.29.20: 0.29.20 (2020-06-10) ==================== @@ -479,36 +1916,38 @@ Bugs fixed * Nested try-except statements with multiple ``return`` statements could crash due to incorrect deletion of the ``except as`` target variable. - (Github issue #3666) + (Github issue :issue:`3666`) * The ``@classmethod`` decorator no longer rejects unknown input from other decorators. - Patch by David Woods. (Github issue #3660) + Patch by David Woods. (Github issue :issue:`3660`) * Fused types could leak into unrelated usages. - Patch by David Woods. (Github issue #3642) + Patch by David Woods. (Github issue :issue:`3642`) * Now uses ``Py_SET_SIZE()`` and ``Py_SET_REFCNT()`` in Py3.9+ to avoid low-level write access to these object fields. - Patch by Victor Stinner. (Github issue #3639) + Patch by Victor Stinner. (Github issue :issue:`3639`) * The built-in ``abs()`` function could lead to undefined behaviour when used on the negative-most value of a signed C integer type. - Patch by Serge Guelton. (Github issue #1911) + Patch by Serge Guelton. (Github issue :issue:`1911`) * Usages of ``sizeof()`` and ``typeid()`` on uninitialised variables no longer produce a warning. - Patch by Celelibi. (Github issue #3575) + Patch by Celelibi. (Github issue :issue:`3575`) * The C++ ``typeid()`` function was allowed in C mode. - Patch by Celelibi. (Github issue #3637) + Patch by Celelibi. (Github issue :issue:`3637`) * The error position reported for errors found in f-strings was misleading. - (Github issue #3674) + (Github issue :issue:`3674`) * The new ``c_api_binop_methods`` directive was added for forward compatibility, but can only be set to True (the current default value). It can be disabled in Cython 3.0. +.. _0.29.19: + 0.29.19 (2020-05-20) ==================== @@ -516,11 +1955,13 @@ Bugs fixed ---------- * A typo in Windows specific code in 0.29.18 was fixed that broke "libc.math". - (Github issue #3622) + (Github issue :issue:`3622`) * A platform specific test failure in 0.29.18 was fixed. - Patch by smutch. (Github issue #3620) + Patch by smutch. (Github issue :issue:`3620`) + +.. _0.29.18: 0.29.18 (2020-05-18) ==================== @@ -538,45 +1979,47 @@ Bugs fixed * A memory corruption was fixed when garbage collection was triggered during calls to ``PyType_Ready()`` of extension type subclasses. - (Github issue #3603) + (Github issue :issue:`3603`) * Memory view slicing generated unused error handling code which could negatively impact the C compiler optimisations for parallel OpenMP code etc. Also, it is now helped by static branch hints. - (Github issue #2987) + (Github issue :issue:`2987`) * Cython's built-in OpenMP functions were not translated inside of call arguments. - Original patch by Celelibi and David Woods. (Github issue #3594) + Original patch by Celelibi and David Woods. (Github issue :issue:`3594`) * Complex buffer item types of structs of arrays could fail to validate. - Patch by Leo and smutch. (Github issue #1407) + Patch by Leo and smutch. (Github issue :issue:`1407`) * Decorators were not allowed on nested `async def` functions. - (Github issue #1462) + (Github issue :issue:`1462`) * C-tuples could use invalid C struct casting. - Patch by MegaIng. (Github issue #3038) + Patch by MegaIng. (Github issue :issue:`3038`) * Optimised ``%d`` string formatting into f-strings failed on float values. - (Github issue #3092) + (Github issue :issue:`3092`) * Optimised aligned string formatting (``%05s``, ``%-5s``) failed. - (Github issue #3476) + (Github issue :issue:`3476`) * When importing the old Cython ``build_ext`` integration with distutils, the additional command line arguments leaked into the regular command. - Patch by Kamekameha. (Github issue #2209) + Patch by Kamekameha. (Github issue :issue:`2209`) * When using the ``CYTHON_NO_PYINIT_EXPORT`` option in C++, the module init function was not declared as ``extern "C"``. - (Github issue #3414) + (Github issue :issue:`3414`) * Three missing timedelta access macros were added in ``cpython.datetime``. * The signature of the NumPy C-API function ``PyArray_SearchSorted()`` was fixed. - Patch by Brock Mendel. (Github issue #3606) + Patch by Brock Mendel. (Github issue :issue:`3606`) +.. _0.29.17: + 0.29.17 (2020-04-26) ==================== @@ -584,42 +2027,44 @@ Features added -------------- * ``std::move()`` is now available from ``libcpp.utility``. - Patch by Omer Ozarslan. (Github issue #2169) + Patch by Omer Ozarslan. (Github issue :issue:`2169`) * The ``@cython.binding`` decorator is available in Python code. - (Github issue #3505) + (Github issue :issue:`3505`) Bugs fixed ---------- * Creating an empty unicode slice with large bounds could crash. - Patch by Sam Sneddon. (Github issue #3531) + Patch by Sam Sneddon. (Github issue :issue:`3531`) * Decoding an empty bytes/char* slice with large bounds could crash. - Patch by Sam Sneddon. (Github issue #3534) + Patch by Sam Sneddon. (Github issue :issue:`3534`) * Re-importing a Cython extension no longer raises the error "``__reduce_cython__ not found``". - (Github issue #3545) + (Github issue :issue:`3545`) * Unused C-tuples could generate incorrect code in 0.29.16. - Patch by Kirk Meyer. (Github issue #3543) + Patch by Kirk Meyer. (Github issue :issue:`3543`) * Creating a fused function attached it to the garbage collector before it was fully initialised, thus risking crashes in rare failure cases. - Original patch by achernomorov. (Github issue #3215) + Original patch by achernomorov. (Github issue :issue:`3215`) * Temporary buffer indexing variables were not released and could show up in C compiler warnings, e.g. in generators. - Patch by David Woods. (Github issues #3430, #3522) + Patch by David Woods. (Github issues :issue:`3430`, :issue:`3522`) * The compilation cache in ``cython.inline("…")`` failed to take the language level into account. - Patch by will-ca. (Github issue #3419) + Patch by will-ca. (Github issue :issue:`3419`) * The deprecated ``PyUnicode_GET_SIZE()`` function is no longer used in Py3. +.. _0.29.16: + 0.29.16 (2020-03-24) ==================== @@ -627,50 +2072,53 @@ Bugs fixed ---------- * Temporary internal variables in nested prange loops could leak into other - threads. Patch by Frank Schlimbach. (Github issue #3348) + threads. Patch by Frank Schlimbach. (Github issue :issue:`3348`) * Default arguments on fused functions could crash. - Patch by David Woods. (Github issue #3370) + Patch by David Woods. (Github issue :issue:`3370`) * C-tuples declared in ``.pxd`` files could generate incomplete C code. - Patch by Kirk Meyer. (Github issue #1427) + Patch by Kirk Meyer. (Github issue :issue:`1427`) * Fused functions were not always detected and optimised as Cython implemented functions. - Patch by David Woods. (Github issue #3384) + Patch by David Woods. (Github issue :issue:`3384`) * Valid Python object concatenation of (iterable) strings to non-strings could fail with an exception. - Patch by David Woods. (Github issue #3433) + Patch by David Woods. (Github issue :issue:`3433`) * Using C functions as temporary values lead to invalid C code. - Original patch by David Woods. (Github issue #3418) + Original patch by David Woods. (Github issue :issue:`3418`) * Fix an unhandled C++ exception in comparisons. - Patch by David Woods. (Github issue #3361) + Patch by David Woods. (Github issue :issue:`3361`) * Fix deprecated import of "imp" module. - Patch by Matti Picus. (Github issue #3350) + Patch by Matti Picus. (Github issue :issue:`3350`) * Fix compatibility with Pythran 0.9.6 and later. - Patch by Serge Guelton. (Github issue #3308) + Patch by Serge Guelton. (Github issue :issue:`3308`) * The ``_Py_PyAtExit()`` function in ``cpython.pylifecycle`` was misdeclared. - Patch by Zackery Spytz. (Github issue #3382) + Patch by Zackery Spytz. (Github issue :issue:`3382`) * Several missing declarations in ``cpython.*`` were added. - Patches by Zackery Spytz. (Github issue #3452, #3421, #3411, #3402) + Patches by Zackery Spytz. (Github issue :issue:`3452`, :issue:`3421`, :issue:`3411`, :issue:`3402`) * A declaration for ``libc.math.fpclassify()`` was added. - Patch by Zackery Spytz. (Github issue #2514) + Patch by Zackery Spytz. (Github issue :issue:`2514`) * Avoid "undeclared" warning about automatically generated pickle methods. - Patch by David Woods. (Github issue #3353) + Patch by David Woods. (Github issue :issue:`3353`) * Avoid C compiler warning about unreachable code in ``prange()``. * Some C compiler warnings in PyPy were resolved. - Patch by Matti Picus. (Github issue #3437) + Patch by Matti Picus. (Github issue :issue:`3437`) + + +.. _0.29.15: 0.29.15 (2020-02-06) @@ -680,27 +2128,29 @@ Bugs fixed ---------- * Crash when returning a temporary Python object from an async-def function. - (Github issue #3337) + (Github issue :issue:`3337`) * Crash when using ``**kwargs`` in generators. - Patch by David Woods. (Github issue #3265) + Patch by David Woods. (Github issue :issue:`3265`) * Double reference free in ``__class__`` cell handling for ``super()`` calls. - (Github issue #3246) + (Github issue :issue:`3246`) * Compile error when using ``*args`` as Python class bases. - (Github issue #3338) + (Github issue :issue:`3338`) * Import failure in IPython 7.11. - (Github issue #3297) + (Github issue :issue:`3297`) * Fixed C name collision in the auto-pickle code. - Patch by ThePrez. (Github issue #3238) + Patch by ThePrez. (Github issue :issue:`3238`) * Deprecated import failed in Python 3.9. - (Github issue #3266) + (Github issue :issue:`3266`) +.. _0.29.14: + 0.29.14 (2019-11-01) ==================== @@ -708,36 +2158,36 @@ Bugs fixed ---------- * The generated code failed to initialise the ``tp_print`` slot in CPython 3.8. - Patches by Pablo Galindo and Orivej Desh. (Github issues #3171, #3201) + Patches by Pablo Galindo and Orivej Desh. (Github issues :issue:`3171`, :issue:`3201`) * ``?`` for ``bool`` was missing from the supported NumPy dtypes. - Patch by Max Klein. (Github issue #2675) + Patch by Max Klein. (Github issue :issue:`2675`) * ``await`` was not allowed inside of f-strings. - Patch by Dmitro Getz. (Github issue #2877) + Patch by Dmitro Getz. (Github issue :issue:`2877`) * Coverage analysis failed for projects where the code resides in separate source sub-directories. - Patch by Antonio Valentino. (Github issue #1985) + Patch by Antonio Valentino. (Github issue :issue:`1985`) * An incorrect compiler warning was fixed in automatic C++ string conversions. - Patch by Gerion Entrup. (Github issue #3108) + Patch by Gerion Entrup. (Github issue :issue:`3108`) * Error reports in the Jupyter notebook showed unhelpful stack traces. - Patch by Matthew Edwards (Github issue #3196). + Patch by Matthew Edwards (Github issue :issue:`3196`). * ``Python.h`` is now also included explicitly from ``public`` header files. - (Github issue #3133). + (Github issue :issue:`3133`). * Distutils builds with ``--parallel`` did not work when using Cython's deprecated ``build_ext`` command. - Patch by Alphadelta14 (Github issue #3187). + Patch by Alphadelta14 (Github issue :issue:`3187`). Other changes ------------- * The ``PyMemoryView_*()`` C-API is available in ``cpython.memoryview``. - Patch by Nathan Manville. (Github issue #2541) + Patch by Nathan Manville. (Github issue :issue:`2541`) 0.29.13 (2019-07-26) @@ -747,17 +2197,16 @@ Bugs fixed ---------- * A reference leak for ``None`` was fixed when converting a memoryview - to a Python object. (Github issue #3023) + to a Python object. (Github issue :issue:`3023`) * The declaration of ``PyGILState_STATE`` in ``cpython.pystate`` was unusable. - Patch by Kirill Smelkov. (Github issue #2997) - + Patch by Kirill Smelkov. (Github issue :issue:`2997`) Other changes ------------- * The declarations in ``posix.mman`` were extended. - Patches by Kirill Smelkov. (Github issues #2893, #2894, #3012) + Patches by Kirill Smelkov. (Github issues :issue:`2893`, :issue:`2894`, :issue:`3012`) 0.29.12 (2019-07-07) @@ -767,16 +2216,16 @@ Bugs fixed ---------- * Fix compile error in CPython 3.8b2 regarding the ``PyCode_New()`` signature. - (Github issue #3031) + (Github issue :issue:`3031`) * Fix a C compiler warning about a missing ``int`` downcast. - (Github issue #3028) + (Github issue :issue:`3028`) * Fix reported error positions of undefined builtins and constants. - Patch by Orivej Desh. (Github issue #3030) + Patch by Orivej Desh. (Github issue :issue:`3030`) * A 32 bit issue in the Pythran support was resolved. - Patch by Serge Guelton. (Github issue #3032) + Patch by Serge Guelton. (Github issue :issue:`3032`) 0.29.11 (2019-06-30) @@ -786,26 +2235,26 @@ Bugs fixed ---------- * Fix compile error in CPython 3.8b2 regarding the ``PyCode_New()`` signature. - Patch by Nick Coghlan. (Github issue #3009) + Patch by Nick Coghlan. (Github issue :issue:`3009`) * Invalid C code generated for lambda functions in cdef methods. - Patch by Josh Tobin. (Github issue #2967) + Patch by Josh Tobin. (Github issue :issue:`2967`) * Support slice handling in newer Pythran versions. - Patch by Serge Guelton. (Github issue #2989) + Patch by Serge Guelton. (Github issue :issue:`2989`) * A reference leak in power-of-2 calculation was fixed. - Patch by Sebastian Berg. (Github issue #3022) + Patch by Sebastian Berg. (Github issue :issue:`3022`) * The search order for include files was changed. Previously it was ``include_directories``, ``Cython/Includes``, ``sys.path``. Now it is ``include_directories``, ``sys.path``, ``Cython/Includes``. This was done to allow third-party ``*.pxd`` files to override the ones in Cython. - Original patch by Matti Picus. (Github issue #2905) + Original patch by Matti Picus. (Github issue :issue:`2905`) * Setting ``language_level=2`` in a file did not work if ``language_level=3`` was enabled globally before. - Patch by Jeroen Demeyer. (Github issue #2791) + Patch by Jeroen Demeyer. (Github issue :issue:`2791`) 0.29.10 (2019-06-02) @@ -815,7 +2264,7 @@ Bugs fixed ---------- * Fix compile errors in CPython 3.8b1 due to the new "tp_vectorcall" slots. - (Github issue #2976) + (Github issue :issue:`2976`) 0.29.9 (2019-05-29) @@ -827,7 +2276,7 @@ Bugs fixed * Fix a crash regression in 0.29.8 when creating code objects fails. * Remove an incorrect cast when using true-division in C++ operations. - (Github issue #1950) + (Github issue :issue:`1950`) 0.29.8 (2019-05-28) @@ -837,20 +2286,20 @@ Bugs fixed ---------- * C compile errors with CPython 3.8 were resolved. - Patch by Marcel Plch. (Github issue #2938) + Patch by Marcel Plch. (Github issue :issue:`2938`) * Python tuple constants that compare equal but have different item types could incorrectly be merged into a single constant. - (Github issue #2919) + (Github issue :issue:`2919`) * Non-ASCII characters in unprefixed strings could crash the compiler when used with language level ``3str``. * Starred expressions in %-formatting tuples could fail to compile for - unicode strings. (Github issue #2939) + unicode strings. (Github issue :issue:`2939`) * Passing Python class references through ``cython.inline()`` was broken. - (Github issue #2936) + (Github issue :issue:`2936`) 0.29.7 (2019-04-14) @@ -862,18 +2311,18 @@ Bugs fixed * Crash when the shared Cython config module gets unloaded and another Cython module reports an exceptions. Cython now makes sure it keeps an owned reference to the module. - (Github issue #2885) + (Github issue :issue:`2885`) * Resolved a C89 compilation problem when enabling the fast-gil sharing feature. * Coverage reporting did not include the signature line of ``cdef`` functions. - (Github issue #1461) + (Github issue :issue:`1461`) * Casting a GIL-requiring function into a nogil function now issues a warning. - (Github issue #2879) + (Github issue :issue:`2879`) * Generators and coroutines were missing their return type annotation. - (Github issue #2884) + (Github issue :issue:`2884`) 0.29.6 (2019-02-27) @@ -883,17 +2332,17 @@ Bugs fixed ---------- * Fix a crash when accessing the ``__kwdefaults__`` special attribute of - fused functions. (Github issue #1470) + fused functions. (Github issue :issue:`1470`) * Fix the parsing of buffer format strings that contain numeric sizes, which - could lead to incorrect input rejections. (Github issue #2845) + could lead to incorrect input rejections. (Github issue :issue:`2845`) * Avoid a C #pragma in old gcc versions that was only added in GCC 4.6. - Patch by Michael Anselmi. (Github issue #2838) + Patch by Michael Anselmi. (Github issue :issue:`2838`) * Auto-encoding of Unicode strings to UTF-8 C/C++ strings failed in Python 3, even though the default encoding there is UTF-8. - (Github issue #2819) + (Github issue :issue:`2819`) 0.29.5 (2019-02-09) @@ -903,16 +2352,16 @@ Bugs fixed ---------- * Crash when defining a Python subclass of an extension type and repeatedly calling - a cpdef method on it. (Github issue #2823) + a cpdef method on it. (Github issue :issue:`2823`) * Compiler crash when ``prange()`` loops appear inside of with-statements. - (Github issue #2780) + (Github issue :issue:`2780`) * Some C compiler warnings were resolved. - Patches by Christoph Gohlke. (Github issues #2815, #2816, #2817, #2822) + Patches by Christoph Gohlke. (Github issues :issue:`2815`, :issue:`2816`, :issue:`2817`, :issue:`2822`) * Python conversion of C++ enums failed in 0.29. - Patch by Orivej Desh. (Github issue #2767) + Patch by Orivej Desh. (Github issue :issue:`2767`) 0.29.4 (2019-02-01) @@ -922,7 +2371,7 @@ Bugs fixed ---------- * Division of numeric constants by a runtime value of 0 could fail to raise a - ``ZeroDivisionError``. (Github issue #2820) + ``ZeroDivisionError``. (Github issue :issue:`2820`) 0.29.3 (2019-01-19) @@ -932,19 +2381,19 @@ Bugs fixed ---------- * Some C code for memoryviews was generated in a non-deterministic order. - Patch by Martijn van Steenbergen. (Github issue #2779) + Patch by Martijn van Steenbergen. (Github issue :issue:`2779`) * C89 compatibility was accidentally lost since 0.28. - Patches by gastineau and true-pasky. (Github issues #2778, #2801) + Patches by gastineau and true-pasky. (Github issues :issue:`2778`, :issue:`2801`) * A C compiler cast warning was resolved. - Patch by Michael Buesch. (Github issue #2774) + Patch by Michael Buesch. (Github issue :issue:`2774`) * An compilation failure with complex numbers under MSVC++ was resolved. - (Github issue #2797) + (Github issue :issue:`2797`) * Coverage reporting could fail when modules were moved around after the build. - Patch by Wenjun Si. (Github issue #2776) + Patch by Wenjun Si. (Github issue :issue:`2776`) 0.29.2 (2018-12-14) @@ -954,16 +2403,16 @@ Bugs fixed ---------- * The code generated for deduplicated constants leaked some references. - (Github issue #2750) + (Github issue :issue:`2750`) * The declaration of ``sigismember()`` in ``libc.signal`` was corrected. - (Github issue #2756) + (Github issue :issue:`2756`) * Crashes in compiler and test runner were fixed. - (Github issue #2736, #2755) + (Github issue :issue:`2736`, :issue:`2755`) * A C compiler warning about an invalid safety check was resolved. - (Github issue #2731) + (Github issue :issue:`2731`) 0.29.1 (2018-11-24) @@ -974,47 +2423,47 @@ Bugs fixed * Extensions compiled with MinGW-64 under Windows could misinterpret integer objects larger than 15 bit and return incorrect results. - (Github issue #2670) + (Github issue :issue:`2670`) * Cython no longer requires the source to be writable when copying its data into a memory view slice. - Patch by Andrey Paramonov. (Github issue #2644) + Patch by Andrey Paramonov. (Github issue :issue:`2644`) * Line tracing of ``try``-statements generated invalid C code. - (Github issue #2274) + (Github issue :issue:`2274`) * When using the ``warn.undeclared`` directive, Cython's own code generated warnings that are now fixed. - Patch by Nicolas Pauss. (Github issue #2685) + Patch by Nicolas Pauss. (Github issue :issue:`2685`) * Cython's memoryviews no longer require strides for setting the shape field but only the ``PyBUF_ND`` flag to be set. - Patch by John Kirkham. (Github issue #2716) + Patch by John Kirkham. (Github issue :issue:`2716`) * Some C compiler warnings about unused memoryview code were fixed. - Patch by Ho Cheuk Ting. (Github issue #2588) + Patch by Ho Cheuk Ting. (Github issue :issue:`2588`) * A C compiler warning about implicit signed/unsigned conversion was fixed. - (Github issue #2729) + (Github issue :issue:`2729`) * Assignments to C++ references returned by ``operator[]`` could fail to compile. - (Github issue #2671) + (Github issue :issue:`2671`) * The power operator and the support for NumPy math functions were fixed in Pythran expressions. - Patch by Serge Guelton. (Github issues #2702, #2709) + Patch by Serge Guelton. (Github issues :issue:`2702`, :issue:`2709`) * Signatures with memory view arguments now show the expected type when embedded in docstrings. - Patch by Matthew Chan and Benjamin Weigel. (Github issue #2634) + Patch by Matthew Chan and Benjamin Weigel. (Github issue :issue:`2634`) * Some ``from ... cimport ...`` constructs were not correctly considered when searching modified dependencies in ``cythonize()`` to decide whether to recompile a module. - Patch by Kryštof Pilnáček. (Github issue #2638) + Patch by Kryštof Pilnáček. (Github issue :issue:`2638`) * A struct field type in the ``cpython.array`` declarations was corrected. - Patch by John Kirkham. (Github issue #2712) + Patch by John Kirkham. (Github issue :issue:`2712`) 0.29 (2018-10-14) @@ -1031,20 +2480,20 @@ Features added types to integrate with static analysers in typed Python code. They are available in the ``Cython/Shadow.pyi`` module and describe the types in the special ``cython`` module that can be used for typing in Python code. - Original patch by Julian Gethmann. (Github issue #1965) + Original patch by Julian Gethmann. (Github issue :issue:`1965`) * Memoryviews are supported in PEP-484/526 style type declarations. - (Github issue #2529) + (Github issue :issue:`2529`) * ``@cython.nogil`` is supported as a C-function decorator in Python code. - (Github issue #2557) + (Github issue :issue:`2557`) * Raising exceptions from nogil code will automatically acquire the GIL, instead of requiring an explicit ``with gil`` block. * C++ functions can now be declared as potentially raising both C++ and Python exceptions, so that Cython can handle both correctly. - (Github issue #2615) + (Github issue :issue:`2615`) * ``cython.inline()`` supports a direct ``language_level`` keyword argument that was previously only available via a directive. @@ -1058,14 +2507,14 @@ Features added * In CPython 3.6 and later, looking up globals in the module dict is almost as fast as looking up C globals. - (Github issue #2313) + (Github issue :issue:`2313`) * For a Python subclass of an extension type, repeated method calls to non-overridden cpdef methods can avoid the attribute lookup in Py3.6+, which makes them 4x faster. - (Github issue #2313) + (Github issue :issue:`2313`) * (In-)equality comparisons of objects to integer literals are faster. - (Github issue #2188) + (Github issue :issue:`2188`) * Some internal and 1-argument method calls are faster. @@ -1073,26 +2522,26 @@ Features added execute less import requests during module initialisation. * Constant tuples and slices are deduplicated and only created once per module. - (Github issue #2292) + (Github issue :issue:`2292`) * The coverage plugin considers more C file extensions such as ``.cc`` and ``.cxx``. - (Github issue #2266) + (Github issue :issue:`2266`) * The ``cythonize`` command accepts compile time variable values (as set by ``DEF``) through the new ``-E`` option. - Patch by Jerome Kieffer. (Github issue #2315) + Patch by Jerome Kieffer. (Github issue :issue:`2315`) * ``pyximport`` can import from namespace packages. - Patch by Prakhar Goel. (Github issue #2294) + Patch by Prakhar Goel. (Github issue :issue:`2294`) * Some missing numpy and CPython C-API declarations were added. - Patch by John Kirkham. (Github issues #2523, #2520, #2537) + Patch by John Kirkham. (Github issues :issue:`2523`, :issue:`2520`, :issue:`2537`) * Declarations for the ``pylifecycle`` C-API functions were added in a new .pxd file ``cpython.pylifecycle``. * The Pythran support was updated to work with the latest Pythran 0.8.7. - Original patch by Adrien Guinet. (Github issue #2600) + Original patch by Adrien Guinet. (Github issue :issue:`2600`) * ``%a`` is included in the string formatting types that are optimised into f-strings. In this case, it is also automatically mapped to ``%r`` in Python 2.x. @@ -1105,7 +2554,7 @@ Features added * An additional ``check_size`` clause was added to the ``ctypedef class`` name specification to allow suppressing warnings when importing modules with backwards-compatible ``PyTypeObject`` size changes. - Patch by Matti Picus. (Github issue #2627) + Patch by Matti Picus. (Github issue :issue:`2627`) Bugs fixed ---------- @@ -1113,13 +2562,13 @@ Bugs fixed * The exception handling in generators and coroutines under CPython 3.7 was adapted to the newly introduced exception stack. Users of Cython 0.28 who want to support Python 3.7 are encouraged to upgrade to 0.29 to avoid potentially incorrect error - reporting and tracebacks. (Github issue #1958) + reporting and tracebacks. (Github issue :issue:`1958`) * Crash when importing a module under Stackless Python that was built for CPython. - Patch by Anselm Kruis. (Github issue #2534) + Patch by Anselm Kruis. (Github issue :issue:`2534`) * 2-value slicing of typed sequences failed if the start or stop index was None. - Patch by Christian Gibson. (Github issue #2508) + Patch by Christian Gibson. (Github issue :issue:`2508`) * Multiplied string literals lost their factor when they are part of another constant expression (e.g. 'x' * 10 + 'y' => 'xy'). @@ -1129,38 +2578,38 @@ Bugs fixed (Python issue 28598) * The directive ``language_level=3`` did not apply to the first token in the - source file. (Github issue #2230) + source file. (Github issue :issue:`2230`) * Overriding cpdef methods did not work in Python subclasses with slots. Note that this can have a performance impact on calls from Cython code. - (Github issue #1771) + (Github issue :issue:`1771`) * Fix declarations of builtin or C types using strings in pure python mode. - (Github issue #2046) + (Github issue :issue:`2046`) * Generator expressions and lambdas failed to compile in ``@cfunc`` functions. - (Github issue #459) + (Github issue :issue:`459`) * Global names with ``const`` types were not excluded from star-import assignments which could lead to invalid C code. - (Github issue #2621) + (Github issue :issue:`2621`) * Several internal function signatures were fixed that lead to warnings in gcc-8. - (Github issue #2363) + (Github issue :issue:`2363`) * The numpy helper functions ``set_array_base()`` and ``get_array_base()`` were adapted to the current numpy C-API recommendations. - Patch by Matti Picus. (Github issue #2528) + Patch by Matti Picus. (Github issue :issue:`2528`) * Some NumPy related code was updated to avoid deprecated API usage. - Original patch by jbrockmendel. (Github issue #2559) + Original patch by jbrockmendel. (Github issue :issue:`2559`) * Several C++ STL declarations were extended and corrected. - Patch by Valentin Valls. (Github issue #2207) + Patch by Valentin Valls. (Github issue :issue:`2207`) * C lines of the module init function were unconditionally not reported in exception stack traces. - Patch by Jeroen Demeyer. (Github issue #2492) + Patch by Jeroen Demeyer. (Github issue :issue:`2492`) * When PEP-489 support is enabled, reloading the module overwrote any static module state. It now raises an exception instead, given that reloading is @@ -1168,11 +2617,11 @@ Bugs fixed * Object-returning, C++ exception throwing functions were not checking that the return value was non-null. - Original patch by Matt Wozniski (Github Issue #2603) + Original patch by Matt Wozniski (Github issue :issue:`2603`) * The source file encoding detection could get confused if the ``c_string_encoding`` directive appeared within the first two lines. - (Github issue #2632) + (Github issue :issue:`2632`) * Cython generated modules no longer emit a warning during import when the size of the NumPy array type is larger than what was found at compile time. @@ -1194,7 +2643,7 @@ Other changes * The documentation was restructured, cleaned up and examples are now tested. The NumPy tutorial was also rewritten to simplify the running example. - Contributed by Gabriel de Marmiesse. (Github issue #2245) + Contributed by Gabriel de Marmiesse. (Github issue :issue:`2245`) * Cython compiles less of its own modules at build time to reduce the installed package size to about half of its previous size. This makes the compiler @@ -1209,7 +2658,7 @@ Bugs fixed * Extensions compiled with MinGW-64 under Windows could misinterpret integer objects larger than 15 bit and return incorrect results. - (Github issue #2670) + (Github issue :issue:`2670`) * Multiplied string literals lost their factor when they are part of another constant expression (e.g. 'x' * 10 + 'y' => 'xy'). @@ -1223,7 +2672,7 @@ Bugs fixed * The discouraged usage of GCC's attribute ``optimize("Os")`` was replaced by the similar attribute ``cold`` to reduce the code impact of the module init functions. - (Github issue #2494) + (Github issue :issue:`2494`) * A reference leak in Py2.x was fixed when comparing str to unicode for equality. @@ -1236,12 +2685,12 @@ Bugs fixed * Reallowing ``tp_clear()`` in a subtype of an ``@no_gc_clear`` extension type generated an invalid C function call to the (non-existent) base type implementation. - (Github issue #2309) + (Github issue :issue:`2309`) * Exception catching based on a non-literal (runtime) tuple could fail to match the - exception. (Github issue #2425) + exception. (Github issue :issue:`2425`) -* Compile fix for CPython 3.7.0a2. (Github issue #2477) +* Compile fix for CPython 3.7.0a2. (Github issue :issue:`2477`) 0.28.3 (2018-05-27) @@ -1253,13 +2702,13 @@ Bugs fixed * Set iteration was broken in non-CPython since 0.28. * ``UnicodeEncodeError`` in Py2 when ``%s`` formatting is optimised for - unicode strings. (Github issue #2276) + unicode strings. (Github issue :issue:`2276`) * Work around a crash bug in g++ 4.4.x by disabling the size reduction setting - of the module init function in this version. (Github issue #2235) + of the module init function in this version. (Github issue :issue:`2235`) * Crash when exceptions occur early during module initialisation. - (Github issue #2199) + (Github issue :issue:`2199`) 0.28.2 (2018-04-13) @@ -1271,10 +2720,10 @@ Features added * ``abs()`` is faster for Python long objects. * The C++11 methods ``front()`` and ``end()`` were added to the declaration of - ``libcpp.string``. Patch by Alex Huszagh. (Github issue #2123) + ``libcpp.string``. Patch by Alex Huszagh. (Github issue :issue:`2123`) * The C++11 methods ``reserve()`` and ``bucket_count()`` are declared for - ``libcpp.unordered_map``. Patch by Valentin Valls. (Github issue #2168) + ``libcpp.unordered_map``. Patch by Valentin Valls. (Github issue :issue:`2168`) Bugs fixed ---------- @@ -1282,24 +2731,24 @@ Bugs fixed * The copy of a read-only memoryview was considered read-only as well, whereas a common reason to copy a read-only view is to make it writable. The result of the copying is now a writable buffer by default. - (Github issue #2134) + (Github issue :issue:`2134`) * The ``switch`` statement generation failed to apply recursively to the body of converted if-statements. * ``NULL`` was sometimes rejected as exception return value when the returned type is a fused pointer type. - Patch by Callie LeFave. (Github issue #2177) + Patch by Callie LeFave. (Github issue :issue:`2177`) * Fixed compatibility with PyPy 5.11. - Patch by Matti Picus. (Github issue #2165) + Patch by Matti Picus. (Github issue :issue:`2165`) Other changes ------------- * The NumPy tutorial was rewritten to use memoryviews instead of the older buffer declaration syntax. - Contributed by Gabriel de Marmiesse. (Github issue #2162) + Contributed by Gabriel de Marmiesse. (Github issue :issue:`2162`) 0.28.1 (2018-03-18) @@ -1313,18 +2762,18 @@ Bugs fixed * Assignment between some C++ templated types were incorrectly rejected when the templates mix ``const`` with ``ctypedef``. - (Github issue #2148) + (Github issue :issue:`2148`) * Undeclared C++ no-args constructors in subclasses could make the compilation fail if the base class constructor was declared without ``nogil``. - (Github issue #2157) + (Github issue :issue:`2157`) * Bytes %-formatting inferred ``basestring`` (bytes or unicode) as result type in some cases where ``bytes`` would have been safe to infer. - (Github issue #2153) + (Github issue :issue:`2153`) * ``None`` was accidentally disallowed as typed return value of ``dict.pop()``. - (Github issue #2152) + (Github issue :issue:`2152`) 0.28 (2018-03-13) @@ -1338,19 +2787,19 @@ Features added the other bases must *not* be cdef classes.) * Type inference is now supported for Pythran compiled NumPy expressions. - Patch by Nils Braun. (Github issue #1954) + Patch by Nils Braun. (Github issue :issue:`1954`) * The ``const`` modifier can be applied to memoryview declarations to allow - read-only buffers as input. (Github issues #1605, #1869) + read-only buffers as input. (Github issues :issue:`1605`, :issue:`1869`) * C code in the docstring of a ``cdef extern`` block is copied verbatimly into the generated file. - Patch by Jeroen Demeyer. (Github issue #1915) + Patch by Jeroen Demeyer. (Github issue :issue:`1915`) * When compiling with gcc, the module init function is now tuned for small code size instead of whatever compile flags were provided externally. Cython now also disables some code intensive optimisations in that function - to further reduce the code size. (Github issue #2102) + to further reduce the code size. (Github issue :issue:`2102`) * Decorating an async coroutine with ``@cython.iterable_coroutine`` changes its type at compile time to make it iterable. While this is not strictly in line @@ -1358,23 +2807,23 @@ Features added use ``yield from`` instead of ``await``. * The IPython magic has preliminary support for JupyterLab. - (Github issue #1775) + (Github issue :issue:`1775`) * The new TSS C-API in CPython 3.7 is supported and has been backported. - Patch by Naotoshi Seo. (Github issue #1932) + Patch by Naotoshi Seo. (Github issue :issue:`1932`) * Cython knows the new ``Py_tss_t`` type defined in PEP-539 and automatically initialises variables declared with that type to ``Py_tss_NEEDS_INIT``, a value which cannot be used outside of static assignments. * The set methods ``.remove()`` and ``.discard()`` are optimised. - Patch by Antoine Pitrou. (Github issue #2042) + Patch by Antoine Pitrou. (Github issue :issue:`2042`) * ``dict.pop()`` is optimised. - Original patch by Antoine Pitrou. (Github issue #2047) + Original patch by Antoine Pitrou. (Github issue :issue:`2047`) * Iteration over sets and frozensets is optimised. - (Github issue #2048) + (Github issue :issue:`2048`) * Safe integer loops (< range(2^30)) are automatically optimised into C loops. @@ -1383,7 +2832,7 @@ Features added * Calls to builtin methods that are not specifically optimised into C-API calls now use a cache that avoids repeated lookups of the underlying C function. - (Github issue #2054) + (Github issue :issue:`2054`) * Single argument function calls can avoid the argument tuple creation in some cases. @@ -1411,19 +2860,19 @@ Features added * Python attribute lookups on extension types without instance dict are faster. * Some missing signals were added to ``libc/signal.pxd``. - Patch by Jeroen Demeyer. (Github issue #1914) + Patch by Jeroen Demeyer. (Github issue :issue:`1914`) * The warning about repeated extern declarations is now visible by default. - (Github issue #1874) + (Github issue :issue:`1874`) * The exception handling of the function types used by CPython's type slot functions was corrected to match the de-facto standard behaviour, so that code that uses them directly benefits from automatic and correct exception - propagation. Patch by Jeroen Demeyer. (Github issue #1980) + propagation. Patch by Jeroen Demeyer. (Github issue :issue:`1980`) * Defining the macro ``CYTHON_NO_PYINIT_EXPORT`` will prevent the module init function from being exported as symbol, e.g. when linking modules statically - in an embedding setup. Patch by AraHaan. (Github issue #1944) + in an embedding setup. Patch by AraHaan. (Github issue :issue:`1944`) Bugs fixed ---------- @@ -1431,11 +2880,11 @@ Bugs fixed * If a module name is explicitly provided for an ``Extension()`` that is compiled via ``cythonize()``, it was previously ignored and replaced by the source file name. It can now be used to override the target module name, e.g. for compiling - prefixed accelerator modules from Python files. (Github issue #2038) + prefixed accelerator modules from Python files. (Github issue :issue:`2038`) * The arguments of the ``num_threads`` parameter of parallel sections were not sufficiently validated and could lead to invalid C code. - (Github issue #1957) + (Github issue :issue:`1957`) * Catching exceptions with a non-trivial exception pattern could call into CPython with a live exception set. This triggered incorrect behaviour @@ -1451,32 +2900,32 @@ Bugs fixed under Python 2. * Some async helper functions were not defined in the generated C code when - compiling simple async code. (Github issue #2075) + compiling simple async code. (Github issue :issue:`2075`) * Line tracing did not include generators and coroutines. - (Github issue #1949) + (Github issue :issue:`1949`) * C++ declarations for ``unordered_map`` were corrected. - Patch by Michael Schatzow. (Github issue #1484) + Patch by Michael Schatzow. (Github issue :issue:`1484`) * Iterator declarations in C++ ``deque`` and ``vector`` were corrected. - Patch by Alex Huszagh. (Github issue #1870) + Patch by Alex Huszagh. (Github issue :issue:`1870`) * The const modifiers in the C++ ``string`` declarations were corrected, together with the coercion behaviour of string literals into C++ strings. - (Github issue #2132) + (Github issue :issue:`2132`) * Some declaration types in ``libc.limits`` were corrected. - Patch by Jeroen Demeyer. (Github issue #2016) + Patch by Jeroen Demeyer. (Github issue :issue:`2016`) * ``@cython.final`` was not accepted on Python classes with an ``@cython.cclass`` - decorator. (Github issue #2040) + decorator. (Github issue :issue:`2040`) * Cython no longer creates useless and incorrect ``PyInstanceMethod`` wrappers for - methods in Python 3. Patch by Jeroen Demeyer. (Github issue #2105) + methods in Python 3. Patch by Jeroen Demeyer. (Github issue :issue:`2105`) * The builtin ``bytearray`` type could not be used as base type of cdef classes. - (Github issue #2106) + (Github issue :issue:`2106`) Other changes ------------- @@ -1489,18 +2938,18 @@ Bugs fixed ---------- * String forward references to extension types like ``@cython.locals(x="ExtType")`` - failed to find the named type. (Github issue #1962) + failed to find the named type. (Github issue :issue:`1962`) * NumPy slicing generated incorrect results when compiled with Pythran. - Original patch by Serge Guelton (Github issue #1946). + Original patch by Serge Guelton (Github issue :issue:`1946`). * Fix "undefined reference" linker error for generators on Windows in Py3.3-3.5. - (Github issue #1968) + (Github issue :issue:`1968`) * Adapt to recent C-API change of ``PyThreadState`` in CPython 3.7. * Fix signature of ``PyWeakref_GetObject()`` API declaration. - Patch by Jeroen Demeyer (Github issue #1975). + Patch by Jeroen Demeyer (Github issue :issue:`1975`). 0.27.2 (2017-10-22) @@ -1510,27 +2959,27 @@ Bugs fixed ---------- * Comprehensions could incorrectly be optimised away when they appeared in boolean - test contexts. (Github issue #1920) + test contexts. (Github issue :issue:`1920`) * The special methods ``__eq__``, ``__lt__`` etc. in extension types did not type - their first argument as the type of the class but ``object``. (Github issue #1935) + their first argument as the type of the class but ``object``. (Github issue :issue:`1935`) * Crash on first lookup of "cline_in_traceback" option during exception handling. - (Github issue #1907) + (Github issue :issue:`1907`) * Some nested module level comprehensions failed to compile. - (Github issue #1906) + (Github issue :issue:`1906`) * Compiler crash on some complex type declarations in pure mode. - (Github issue #1908) + (Github issue :issue:`1908`) * ``std::unordered_map.erase()`` was declared with an incorrect ``void`` return - type in ``libcpp.unordered_map``. (Github issue #1484) + type in ``libcpp.unordered_map``. (Github issue :issue:`1484`) * Invalid use of C++ ``fallthrough`` attribute before C++11 and similar issue in clang. - (Github issue #1930) + (Github issue :issue:`1930`) -* Compiler crash on misnamed properties. (Github issue #1905) +* Compiler crash on misnamed properties. (Github issue :issue:`1905`) 0.27.1 (2017-10-01) @@ -1540,34 +2989,34 @@ Features added -------------- * The Jupyter magic has a new debug option ``--verbose`` that shows details about - the distutils invocation. Patch by Boris Filippov (Github issue #1881). + the distutils invocation. Patch by Boris Filippov (Github issue :issue:`1881`). Bugs fixed ---------- * Py3 list comprehensions in class bodies resulted in invalid C code. - (Github issue #1889) + (Github issue :issue:`1889`) * Modules built for later CPython 3.5.x versions failed to import in 3.5.0/3.5.1. - (Github issue #1880) + (Github issue :issue:`1880`) * Deallocating fused types functions and methods kept their GC tracking enabled, which could potentially lead to recursive deallocation attempts. * Crash when compiling in C++ mode with old setuptools versions. - (Github issue #1879) + (Github issue :issue:`1879`) * C++ object arguments for the constructor of Cython implemented C++ are now passed by reference and not by value to allow for non-copyable arguments, such as ``unique_ptr``. * API-exported C++ classes with Python object members failed to compile. - (Github issue #1866) + (Github issue :issue:`1866`) * Some issues with the new relaxed exception value handling were resolved. * Python classes as annotation types could prevent compilation. - (Github issue #1887) + (Github issue :issue:`1887`) * Cython annotation types in Python files could lead to import failures with a "cython undefined" error. Recognised types are now turned into strings. @@ -1595,7 +3044,7 @@ Features added resolves several differences with regard to normal Python modules. This makes the global names ``__file__`` and ``__path__`` correctly available to module level code and improves the support for module-level relative imports. - (Github issues #1715, #1753, #1035) + (Github issues :issue:`1715`, :issue:`1753`, :issue:`1035`) * Asynchronous generators (`PEP 525 <https://www.python.org/dev/peps/pep-0525/>`_) and asynchronous comprehensions (`PEP 530 <https://www.python.org/dev/peps/pep-0530/>`_) @@ -1608,18 +3057,18 @@ Features added ``cython.int``) are evaluated as C type declarations and everything else as Python types. This can be disabled with the directive ``annotation_typing=False``. Note that most complex PEP-484 style annotations are currently ignored. This will - change in future releases. (Github issue #1850) + change in future releases. (Github issue :issue:`1850`) * Extension types (also in pure Python mode) can implement the normal special methods ``__eq__``, ``__lt__`` etc. for comparisons instead of the low-level ``__richcmp__`` - method. (Github issue #690) + method. (Github issue :issue:`690`) * New decorator ``@cython.exceptval(x=None, check=False)`` that makes the signature declarations ``except x``, ``except? x`` and ``except *`` available to pure Python - code. Original patch by Antonio Cuni. (Github issue #1653) + code. Original patch by Antonio Cuni. (Github issue :issue:`1653`) * Signature annotations are now included in the signature docstring generated by - the ``embedsignature`` directive. Patch by Lisandro Dalcin (Github issue #1781). + the ``embedsignature`` directive. Patch by Lisandro Dalcin (Github issue :issue:`1781`). * The gdb support for Python code (``libpython.py``) was updated to the latest version in CPython 3.7 (git rev 5fe59f8). @@ -1639,15 +3088,15 @@ Features added profile for C compiler optimisation. Currently only tested with gcc. * ``len(memoryview)`` can be used in nogil sections to get the size of the - first dimension of a memory view (``shape[0]``). (Github issue #1733) + first dimension of a memory view (``shape[0]``). (Github issue :issue:`1733`) * C++ classes can now contain (properly refcounted) Python objects. * NumPy dtype subarrays are now accessible through the C-API. - Patch by Gerald Dalley (Github issue #245). + Patch by Gerald Dalley (Github issue :issue:`245`). * Resolves several issues with PyPy and uses faster async slots in PyPy3. - Patch by Ronan Lamy (Github issues #1871, #1878). + Patch by Ronan Lamy (Github issues :issue:`1871`, :issue:`1878`). Bugs fixed ---------- @@ -1658,11 +3107,11 @@ Bugs fixed changes to the ordering of fused methods in the call table, which may break existing compiled modules that call fused cdef methods across module boundaries, if these methods were implemented in a different order than they were declared - in the corresponding .pxd file. (Github issue #1873) + in the corresponding .pxd file. (Github issue :issue:`1873`) * The exception state handling in generators and coroutines could lead to exceptions in the caller being lost if an exception was raised and handled - inside of the coroutine when yielding. (Github issue #1731) + inside of the coroutine when yielding. (Github issue :issue:`1731`) * Loops over ``range(enum)`` were not converted into C for-loops. Note that it is still recommended to use an explicit cast to a C integer type in this case. @@ -1671,27 +3120,27 @@ Bugs fixed name and not at the beginning of the name. * Compile time ``DEF`` assignments were evaluated even when they occur inside of - falsy ``IF`` blocks. (Github issue #1796) + falsy ``IF`` blocks. (Github issue :issue:`1796`) * Disabling the line tracing from a trace function could fail. - Original patch by Dmitry Trofimov. (Github issue #1769) + Original patch by Dmitry Trofimov. (Github issue :issue:`1769`) * Several issues with the Pythran integration were resolved. * abs(signed int) now returns a signed rather than unsigned int. - (Github issue #1837) + (Github issue :issue:`1837`) * Reading ``frame.f_locals`` of a Cython function (e.g. from a debugger or profiler - could modify the module globals. (Github issue #1836) + could modify the module globals. (Github issue :issue:`1836`) * Buffer type mismatches in the NumPy buffer support could leak a reference to the buffer owner. * Using the "is_f_contig" and "is_c_contig" memoryview methods together could leave - one of them undeclared. (Github issue #1872) + one of them undeclared. (Github issue :issue:`1872`) * Compilation failed if the for-in-range loop target was not a variable but a more - complex expression, e.g. an item assignment. (Github issue #1831) + complex expression, e.g. an item assignment. (Github issue :issue:`1831`) * Compile time evaluations of (partially) constant f-strings could show incorrect results. @@ -1709,7 +3158,7 @@ Other changes typing. Only Cython types (e.g. ``cython.int``) and Python builtin types are currently considered as type declarations. Everything else is ignored, but this will change in a future Cython release. - (Github issue #1672) + (Github issue :issue:`1672`) * The directive ``annotation_typing`` is now ``True`` by default, which enables parsing type declarations from annotations. @@ -1731,31 +3180,31 @@ Bugs fixed * Extension types with a ``.pxd`` override for their ``__releasebuffer__`` slot (e.g. as provided by Cython for the Python ``array.array`` type) could leak a reference to the buffer owner on release, thus not freeing the memory. - (Github issue #1638) + (Github issue :issue:`1638`) * Auto-decoding failed in 0.26 for strings inside of C++ containers. - (Github issue #1790) + (Github issue :issue:`1790`) * Compile error when inheriting from C++ container types. - (Github issue #1788) + (Github issue :issue:`1788`) * Invalid C code in generators (declaration after code). - (Github issue #1801) + (Github issue :issue:`1801`) * Arithmetic operations on ``const`` integer variables could generate invalid code. - (Github issue #1798) + (Github issue :issue:`1798`) * Local variables with names of special Python methods failed to compile inside of - closures. (Github issue #1797) + closures. (Github issue :issue:`1797`) * Problem with indirect Emacs buffers in cython-mode. - Patch by Martin Albrecht (Github issue #1743). + Patch by Martin Albrecht (Github issue :issue:`1743`). * Extension types named ``result`` or ``PickleError`` generated invalid unpickling code. - Patch by Jason Madden (Github issue #1786). + Patch by Jason Madden (Github issue :issue:`1786`). * Bazel integration failed to compile ``.py`` files. - Patch by Guro Bokum (Github issue #1784). + Patch by Guro Bokum (Github issue :issue:`1784`). * Some include directories and dependencies were referenced with their absolute paths in the generated files despite lying within the project directory. @@ -1770,23 +3219,23 @@ Features added -------------- * Pythran can be used as a backend for evaluating NumPy array expressions. - Patch by Adrien Guinet (Github issue #1607). + Patch by Adrien Guinet (Github issue :issue:`1607`). * cdef classes now support pickling by default when possible. This can be disabled with the ``auto_pickle`` directive. * Speed up comparisons of strings if their hash value is available. - Patch by Claudio Freire (Github issue #1571). + Patch by Claudio Freire (Github issue :issue:`1571`). * Support pyximport from zip files. - Patch by Sergei Lebedev (Github issue #1485). + Patch by Sergei Lebedev (Github issue :issue:`1485`). * IPython magic now respects the ``__all__`` variable and ignores names with leading-underscore (like ``import *`` does). - Patch by Syrtis Major (Github issue #1625). + Patch by Syrtis Major (Github issue :issue:`1625`). * ``abs()`` is optimised for C complex numbers. - Patch by da-woods (Github issue #1648). + Patch by David Woods (Github issue :issue:`1648`). * The display of C lines in Cython tracebacks can now be enabled at runtime via ``import cython_runtime; cython_runtime.cline_in_traceback=True``. @@ -1795,9 +3244,9 @@ Features added * The overhead of calling fused types generic functions was reduced. * "cdef extern" include files are now also searched relative to the current file. - Patch by Jeroen Demeyer (Github issue #1654). + Patch by Jeroen Demeyer (Github issue :issue:`1654`). -* Optional optimization for re-aquiring the GIL, controlled by the +* Optional optimization for re-acquiring the GIL, controlled by the `fast_gil` directive. Bugs fixed @@ -1807,24 +3256,24 @@ Bugs fixed (explicitly or implicitly) as ``Py_UCS4`` or ``Py_UNICODE`` used the integer value instead of the Unicode string value. Code that relied on the previous behaviour now triggers a warning that can be disabled by - applying an explicit cast. (Github issue #1602) + applying an explicit cast. (Github issue :issue:`1602`) * f-string processing was adapted to changes in PEP 498 and CPython 3.6. * Invalid C code when decoding from UTF-16(LE/BE) byte strings. - (Github issue #1696) + (Github issue :issue:`1696`) * Unicode escapes in 'ur' raw-unicode strings were not resolved in Py2 code. - Original patch by Aaron Gallagher (Github issue #1594). + Original patch by Aaron Gallagher (Github issue :issue:`1594`). * File paths of code objects are now relative. - Original patch by Jelmer Vernooij (Github issue #1565). + Original patch by Jelmer Vernooij (Github issue :issue:`1565`). * Decorators of cdef class methods could be executed twice. - Patch by Jeroen Demeyer (Github issue #1724). + Patch by Jeroen Demeyer (Github issue :issue:`1724`). * Dict iteration using the Py2 ``iter*`` methods failed in PyPy3. - Patch by Armin Rigo (Github issue #1631). + Patch by Armin Rigo (Github issue :issue:`1631`). * Several warnings in the generated code are now suppressed. @@ -1834,15 +3283,15 @@ Other changes * The ``unraisable_tracebacks`` option now defaults to ``True``. * Coercion of C++ containers to Python is no longer automatic on attribute - access (Github issue #1521). + access (Github issue :issue:`1521`). * Access to Python attributes of cimported modules without the corresponding import is now a compile-time (rather than runtime) error. * Do not use special dll linkage for "cdef public" functions. - Patch by Jeroen Demeyer (Github issue #1687). + Patch by Jeroen Demeyer (Github issue :issue:`1687`). -* cdef/cpdef methods must match their declarations. See Github Issue #1732. +* cdef/cpdef methods must match their declarations. See Github issue :issue:`1732`. This is now a warning and will be an error in future releases. @@ -1854,13 +3303,13 @@ Bugs fixed * Fixes several issues with C++ template deduction. -* Fixes a issue with bound method type inference (Github issue #551). +* Fixes a issue with bound method type inference (Github issue :issue:`551`). -* Fixes a bug with cascaded tuple assignment (Github issue #1523). +* Fixes a bug with cascaded tuple assignment (Github issue :issue:`1523`). * Fixed or silenced many Clang warnings. -* Fixes bug with powers of pure real complex numbers (Github issue #1538). +* Fixes bug with powers of pure real complex numbers (Github issue :issue:`1538`). 0.25.1 (2016-10-26) @@ -1869,10 +3318,10 @@ Bugs fixed Bugs fixed ---------- -* Fixes a bug with ``isinstance(o, Exception)`` (Github issue #1496). +* Fixes a bug with ``isinstance(o, Exception)`` (Github issue :issue:`1496`). * Fixes bug with ``cython.view.array`` missing utility code in some cases - (Github issue #1502). + (Github issue :issue:`1502`). Other changes ------------- @@ -1915,7 +3364,7 @@ Features added Patch by Claudio Freire. * Buffer variables are no longer excluded from ``locals()``. - Patch by da-woods. + Patch by David Woods. * Building f-strings is faster, especially when formatting C integers. @@ -2063,7 +3512,7 @@ Bugs fixed * Compile errors and warnings in integer type conversion code. This fixes ticket 877. Patches by Christian Neukirchen, Nikolaus Rath, Ian Henriksen. -* Reference leak when "*args" argument was reassigned in closures. +* Reference leak when ``*args`` argument was reassigned in closures. * Truth-testing Unicode strings could waste time and memory in Py3.3+. @@ -2519,7 +3968,7 @@ Features added * Generators have new properties ``__name__`` and ``__qualname__`` that provide the plain/qualified name of the generator function - (following CPython 3.5). See http://bugs.python.org/issue21205 + (following CPython 3.5). See https://bugs.python.org/issue21205 * The ``inline`` function modifier is available as a decorator ``@cython.inline`` in pure mode. @@ -2565,7 +4014,7 @@ Optimizations evaluation and generally improves the code flow in the generated C code. * The Python expression "2 ** N" is optimised into bit shifting. - See http://bugs.python.org/issue21420 + See https://bugs.python.org/issue21420 * Cascaded assignments (a = b = ...) try to minimise the number of type coercions. @@ -3354,7 +4803,7 @@ Features added * Extension type inheritance from builtin types, such as "cdef class MyUnicode(unicode)", now works without further external type redeclarations (which are also strongly discouraged now and continue to issue a warning). -* GDB support. http://docs.cython.org/src/userguide/debugging.html +* GDB support. https://docs.cython.org/src/userguide/debugging.html * A new build system with support for inline distutils directives, correct dependency tracking, and parallel compilation. https://github.com/cython/cython/wiki/enhancements-distutils_preprocessing @@ -3534,7 +4983,7 @@ Features added cdef np.ndarray[np.complex128_t, ndim=2] arr = \ np.zeros(10, np.complex128) -* Cython can now generate a main()-method for embedding of the Python interpreter into an executable (see #289) [Robert Bradshaw] +* Cython can now generate a main()-method for embedding of the Python interpreter into an executable (see :issue:`289`) [Robert Bradshaw] * @wraparound directive (another way to disable arr[idx] for negative idx) [Dag Sverre Seljebotn] |