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[ty] Understand classes that inherit from subscripted Protocol[] as generic (#17832)

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Alex Waygood 2025-05-09 17:39:15 +01:00 • committed by GitHub
parent 2370297cde
commit d1bb10a66b
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35 changed files with 451 additions and 183 deletions
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6
crates/ty_python_semantic/resources/mdtest/subscript/lists.md
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@ -9,13 +9,13 @@ A list can be indexed into with:
```py
x = [1, 2, 3]
reveal_type(x) # revealed: list
reveal_type(x) # revealed: list[Unknown]
# TODO reveal int
reveal_type(x[0]) # revealed: Unknown
# TODO reveal list
reveal_type(x[0:1]) # revealed: @Todo(specialized non-generic class)
# TODO reveal list[int]
reveal_type(x[0:1]) # revealed: list[Unknown]
# error: [call-non-callable]
reveal_type(x["a"]) # revealed: Unknown

10
crates/ty_python_semantic/resources/mdtest/subscript/tuple.md
View file

@ -83,9 +83,8 @@ python-version = "3.9"
```py
class A(tuple[int, str]): ...
# Runtime value: `(A, tuple, object)`
# TODO: Generics
reveal_type(A.__mro__) # revealed: tuple[<class 'A'>, @Todo(GenericAlias instance), <class 'object'>]
# revealed: tuple[<class 'A'>, <class 'tuple[@Todo(Generic tuple specializations), ...]'>, <class 'Sequence[@Todo(Generic tuple specializations)]'>, <class 'Reversible[@Todo(Generic tuple specializations)]'>, <class 'Collection[@Todo(Generic tuple specializations)]'>, <class 'Iterable[@Todo(Generic tuple specializations)]'>, <class 'Container[@Todo(Generic tuple specializations)]'>, typing.Protocol[_T_co], typing.Generic[_T_co], <class 'object'>]
reveal_type(A.__mro__)
```
## `typing.Tuple`
@ -100,7 +99,7 @@ from typing import Any, Tuple
class A: ...
def _(c: Tuple, d: Tuple[int, A], e: Tuple[Any, ...]):
reveal_type(c) # revealed: tuple
reveal_type(c) # revealed: tuple[Unknown, ...]
reveal_type(d) # revealed: tuple[int, A]
reveal_type(e) # revealed: @Todo(full tuple[...] support)
```
@ -115,7 +114,6 @@ from typing import Tuple
class C(Tuple): ...
# TODO: generic protocols
# revealed: tuple[<class 'C'>, <class 'tuple'>, <class 'Sequence'>, <class 'Reversible'>, <class 'Collection'>, <class 'Iterable'>, <class 'Container'>, @Todo(`Protocol[]` subscript), typing.Generic, <class 'object'>]
# revealed: tuple[<class 'C'>, <class 'tuple[Unknown, ...]'>, <class 'Sequence[Unknown]'>, <class 'Reversible[Unknown]'>, <class 'Collection[Unknown]'>, <class 'Iterable[Unknown]'>, <class 'Container[Unknown]'>, typing.Protocol[_T_co], typing.Generic[_T_co], <class 'object'>]
reveal_type(C.__mro__)
```