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ruff/crates/ty_python_semantic/resources
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Matthew Mckee b30d97e5e0
[ty] Support __setitem__ and improve __getitem__ related diagnostics (#19578) 
## Summary

Adds validation to subscript assignment expressions.

```py
class Foo: ...

class Bar:
    __setattr__ = None

class Baz:
    def __setitem__(self, index: str, value: int) -> None:
        pass

# We now emit a diagnostic on these statements
Foo()[1] = 2
Bar()[1] = 2
Baz()[1] = 2

```

Also improves error messages on invalid `__getitem__` expressions

## Test Plan

Update mdtests and add more to `subscript/instance.md`

---------

Co-authored-by: David Peter <sharkdp@users.noreply.github.com>
Co-authored-by: David Peter <mail@david-peter.de>
2025-08-01 09:23:27 +02:00
..
corpus [ty] Do not consider a type T to satisfy a method member on a protocol unless the method is available on the meta-type of T (#19187) 2025-07-25 11:16:04 +01:00
mdtest [ty] Support __setitem__ and improve __getitem__ related diagnostics (#19578) 2025-08-01 09:23:27 +02:00
primer [ty] Move pandas-stubs to bad.txt (#19659) 2025-07-31 12:33:24 +01:00
README.md

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.