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Dhruv Manilawala 7ea773daf2
[ty] Argument type expansion for overload call evaluation (#18382) 
## Summary

Part of astral-sh/ty#104, closes: astral-sh/ty#468

This PR implements the argument type expansion which is step 3 of the
overload call evaluation algorithm.

Specifically, this step needs to be taken if type checking resolves to
no matching overload and there are argument types that can be expanded.

## Test Plan

Add new test cases.

## Ecosystem analysis

This PR removes 174 `no-matching-overload` false positives -- I looked
at a lot of them and they all are false positives.

One thing that I'm not able to understand is that in
2b7e3adf27/sphinx/ext/autodoc/preserve_defaults.py (L179)
the inferred type of `value` is `str | None` by ty and Pyright, which is
correct, but it's only ty that raises `invalid-argument-type` error
while Pyright doesn't. The constructor method of `DefaultValue` has
declared type of `str` which is invalid.

There are few cases of false positives resulting due to the fact that ty
doesn't implement narrowing on attribute expressions.
2025-06-04 02:12:00 +00:00
..
mdtest [ty] Argument type expansion for overload call evaluation (#18382) 2025-06-04 02:12:00 +00:00
primer [ty] Promote projects to good that now no longer hang (#18370) 2025-06-01 17:25:46 +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.