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[red-knot] Allow all callables to be assignable to @Todo-signatures (#17680)

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## Summary

Removes ~850 diagnostics related to assignability of callable types,
where the callable-being-assigned-to has a "Todo signature", which
should probably accept any left hand side callable/signature.
This commit is contained in:
David Peter 2025-04-28 16:40:35 +02:00 • committed by GitHub
parent 1e8881f9af
commit 07718f4788
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GPG key ID: B5690EEEBB952194
2 changed files with 9 additions and 5 deletions
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12
crates/red_knot_python_semantic/resources/mdtest/annotations/callable.md
View file

@ -225,14 +225,16 @@ Using `Concatenate` as the first argument to `Callable`:
from typing_extensions import Callable, Concatenate
def _(c: Callable[Concatenate[int, str, ...], int]):
reveal_type(c) # revealed: (*args: @Todo(todo signature *args), **kwargs: @Todo(todo signature **kwargs)) -> int
# TODO: Should reveal the correct signature
reveal_type(c) # revealed: (...) -> int
```
And, as one of the parameter types:
```py
def _(c: Callable[[Concatenate[int, str, ...], int], int]):
reveal_type(c) # revealed: (*args: @Todo(todo signature *args), **kwargs: @Todo(todo signature **kwargs)) -> int
# TODO: Should reveal the correct signature
reveal_type(c) # revealed: (...) -> int
```
## Using `typing.ParamSpec`
@ -276,7 +278,8 @@ from typing_extensions import Callable, TypeVarTuple
Ts = TypeVarTuple("Ts")
def _(c: Callable[[int, *Ts], int]):
reveal_type(c) # revealed: (*args: @Todo(todo signature *args), **kwargs: @Todo(todo signature **kwargs)) -> int
# TODO: Should reveal the correct signature
reveal_type(c) # revealed: (...) -> int
```
And, using the legacy syntax using `Unpack`:
@ -285,7 +288,8 @@ And, using the legacy syntax using `Unpack`:
from typing_extensions import Unpack
def _(c: Callable[[int, Unpack[Ts]], int]):
reveal_type(c) # revealed: (*args: @Todo(todo signature *args), **kwargs: @Todo(todo signature **kwargs)) -> int
# TODO: Should reveal the correct signature
reveal_type(c) # revealed: (...) -> int
```
## Member lookup

2
crates/red_knot_python_semantic/src/types/signatures.rs
View file

@ -895,7 +895,7 @@ impl<'db> Parameters<'db> {
Parameter::keyword_variadic(Name::new_static("kwargs"))
.with_annotated_type(todo_type!("todo signature **kwargs")),
],
is_gradual: false,
is_gradual: true,
}
}