mirror of https://github.com/astral-sh/ruff
e6ddeed386
## Summary Implement default-specialization of generic type aliases (implicit or PEP-613) if they are used in a type expression without an explicit specialization. closes https://github.com/astral-sh/ty/issues/1690 ## Typing conformance ```diff -generics_defaults_specialization.py:26:5: error[type-assertion-failure] Type `SomethingWithNoDefaults[int, str]` does not match asserted type `SomethingWithNoDefaults[int, DefaultStrT]` ``` That's exactly what we want ✔️ All other tests in this file pass as well, with the exception of this assertion, which is just wrong (at least according to our interpretation, `type[Bar] != <class 'Bar'>`). I checked that we do correctly default-specialize the type parameter which is not displayed in the diagnostic that we raise. ```py class Bar(SubclassMe[int, DefaultStrT]): ... assert_type(Bar, type[Bar[str]]) # ty: Type `type[Bar[str]]` does not match asserted type `<class 'Bar'>` ``` ## Ecosystem impact Looks like I should have included this last week 😎 ## Test Plan Updated pre-existing tests and add a few new ones. |
||
|---|---|---|
| .. | ||
| resources | ||
| src | ||
| tests | ||
| Cargo.toml | ||
| build.rs | ||
| mdtest.py | ||
| mdtest.py.lock | ||