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ruff/crates/ty_python_semantic/resources
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Alex Waygood 98708976e4
[ty] Fix subtyping/assignability of function- and class-literal types to callback protocols (#20363) 
## Summary

Fixes https://github.com/astral-sh/ty/issues/377.

We were treating any function as being assignable to any callback
protocol, because we were trying to figure out a type's `Callable`
supertype by looking up the `__call__` attribute on the type's
meta-type. But a function-literal's meta-type is `types.FunctionType`,
and `types.FunctionType.__call__` is `(...) -> Any`, which is not very
helpful!

While working on this PR, I also realised that assignability between
class-literals and callback protocols was somewhat broken too, so I
fixed that at the same time.

## Test Plan

Added mdtests
2025-09-12 22:20:09 +01:00
..
corpus [ty] fix deferred name loading in PEP695 generic classes/functions (#19888) 2025-08-13 15:51:59 -07:00
mdtest [ty] Fix subtyping/assignability of function- and class-literal types to callback protocols (#20363) 2025-09-12 22:20:09 +01:00
primer [ty] Update mypy_primer, add egglog-python project (#20078) 2025-09-05 14:17:07 +02:00
README.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00

README.md

Markdown files within the mdtest/ subdirectory are tests of type inference and type checking; executed by the tests/mdtest.rs integration test.

See crates/ty_test/README.md for documentation of this test format.