ruff/crates/ty_python_semantic
David Peter b8dec79182
[ty] Implicit instance attributes declared Final (#19462)
## Summary

Adds proper type inference for implicit instance attributes that are
declared with a "bare" `Final` and adds `invalid-assignment` diagnostics
for all implicit instance attributes that are declared `Final` or
`Final[…]`.

## Test Plan

New and updated MD tests.

## Ecosystem analysis

```diff
pytest (https://github.com/pytest-dev/pytest)
+ error[invalid-return-type] src/_pytest/fixtures.py:1662:24: Return type does not match returned value: expected `Scope`, found `Scope | (Unknown & ~None & ~((...) -> object) & ~str) | (((str, Config, /) -> Unknown) & ~((...) -> object) & ~str) | (Unknown & ~str)
```

The definition of the `scope` attribute is [here](

5f99385635/src/_pytest/fixtures.py (L1020-L1028)).
Looks like this is a new false positive due to missing `TypeAlias`
support that is surfaced here because we now infer a more precise type
for `FixtureDef._scope`.
2025-07-21 20:01:07 +02:00
..
resources [ty] Implicit instance attributes declared Final (#19462) 2025-07-21 20:01:07 +02:00
src [ty] Implicit instance attributes declared Final (#19462) 2025-07-21 20:01:07 +02:00
tests [ty] Track open files in the server (#19264) 2025-07-18 19:33:35 +05:30
build.rs
Cargo.toml [ty] Remove countme from salsa-structs (#19257) 2025-07-10 11:45:09 +00:00
mdtest.py
mdtest.py.lock