ruff/crates/ty_python_semantic
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
..
resources [ty] Support __setitem__ and improve __getitem__ related diagnostics (#19578) 2025-08-01 09:23:27 +02:00
src [ty] Support __setitem__ and improve __getitem__ related diagnostics (#19578) 2025-08-01 09:23:27 +02:00
tests [ty] Track open files in the server (#19264) 2025-07-18 19:33:35 +05:30
build.rs Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
Cargo.toml [ty] Split ScopedPlaceId into ScopedSymbolId and ScopedMemberId (#19497) 2025-07-25 13:54:33 +02:00
mdtest.py Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
mdtest.py.lock Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00