[Python 3.11] AttributeError: `NoneType` object has no attribute `__name__`

[demberto]

Traceback:
    fastenum.enable()
.tox\py311\Lib\site-packages\fastenum\__init__.py:24: in enable
    Patch.enable_patches()
.tox\py311\Lib\site-packages\fastenum\parcher.py:154: in enable_patches
    patch.enable(check)
.tox\py311\Lib\site-packages\fastenum\parcher.py:110: in enable
    cls.__run_on_instance__(obj)
.tox\py311\Lib\site-packages\fastenum\patches.py:53: in __run_on_instance__
    instance.alias = f'_cls_attr_{instance.fget.__name__}'
E   AttributeError: 'NoneType' object has no attribute '__name__'

[Bobronium]

Enum has seen lots of changes in 3.11.

I'm not sure when I'll have time to update the project ensuring compatibility with all currently supported versions and 3.11.
Perhaps it can be simplified to support only 3.11 in a new version, but this is a lot of work as well.

A quick workaround would be to put this in fastenum\patches.py:53:

if instance.alias is None:
    return

With this change it works, but tests are still not compatible with 3.11 so I can't guarantee it won't break somewhere else.

In case you'd like to make a PR with 3.11 support, here's a checklist that comes to mind:

• Tests work (this project includes its own unittests, as well as modified builtin CPython tests)
• PatchedEnum is always faster than BuiltinEnum (use benchmark and feel free to add new testcases)
• There are no breaking changes / differences in public API in patched enum
• There are no warnings emited during enabling/disabling fastenum

[demberto]

I could give it a go, but I am already wary about Python's enum implementation.