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[ty] Intersect with a dynamic type when calculating the metaclass of a class if that class has a dynamic type in its MRO

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Alex Waygood 2025-07-05 21:56:24 +01:00
parent 08d8819c8a
commit 2d04d99315
6 changed files with 35 additions and 13 deletions
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8
crates/ty_python_semantic/resources/mdtest/metaclass.md
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@ -158,15 +158,13 @@ from nonexistent_module import UnknownClass # error: [unresolved-import]
class C(UnknownClass): ...
# TODO: should be `type[type] & Unknown`
reveal_type(C.__class__) # revealed: <class 'type'>
reveal_type(C.__class__) # revealed: type[type] & Unknown
class M(type): ...
class A(metaclass=M): ...
class B(A, UnknownClass): ...
# TODO: should be `type[M] & Unknown`
reveal_type(B.__class__) # revealed: <class 'M'>
reveal_type(B.__class__) # revealed: type[M] & Unknown
```
## Duplicate
@ -176,7 +174,7 @@ class M(type): ...
class A(metaclass=M): ...
class B(A, A): ... # error: [duplicate-base] "Duplicate base class `A`"
reveal_type(B.__class__) # revealed: <class 'M'>
reveal_type(B.__class__) # revealed: type[M] & Unknown
```
## Non-class