8000 gh-105144: Runtime-checkable protocols: move all 'sanity checks' to `_ProtocolMeta.__subclasscheck__` by AlexWaygood · Pull Request #105152 · python/cpython · GitHub
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gh-105144: Runtime-checkable protocols: move all 'sanity checks' to _ProtocolMeta.__subclasscheck__ #105152

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Merged
merged 4 commits into from
May 31, 2023
Merged

gh-105144: Runtime-checkable protocols: move all 'sanity checks' to _ProtocolMeta.__subclasscheck__ #105152

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937e8dc
Runtime-checkable protocols: move all 'sanity checks' to `_ProtocolMe…
AlexWaygood May 31, 2023
3b56274
Simplify
AlexWaygood May 31, 2023
0b13ae0
Explicitly clear the cache
AlexWaygood May 31, 2023
3ba9647
off-by-one error in a comment!
AlexWaygood May 31, 2023
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Explicitly clear the cache
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@AlexWaygood
AlexWaygood committed May 31, 2023
commit 0b13ae02ac75e3d3cacebd6176c3bd194517b366
6 changes: 6 additions & 0 deletions Lib/test/test_typing.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3706,6 +3706,9 @@ def __init__(self):
Foo() # Previously triggered RecursionError

def test_interaction_with_isinstance_checks_on_superclasses_with_ABCMeta(self):
# Ensure the cache is empty, or this test won't work correctly
collections.abc.Sized._abc_registry_clear()

class Foo(collections.abc.Sized, Protocol): pass

# gh-105144: this previously raised TypeError
Expand All @@ -3714,6 +3717,9 @@ class Foo(collections.abc.Sized, Protocol): pass
self.assertNotIsInstance(1, collections.abc.Sized)

def test_interaction_with_isinstance_checks_on_superclasses_with_ABCMeta_2(self):
# Ensure the cache is empty, or this test won't work correctly
collections.abc.Sized._abc_registry_clear()

class Foo(typing.Sized, Protocol): pass

# gh-105144: this previously raised TypeError
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