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[PEP 695] Fix covariance of frozen dataclasses #17783

Merged
merged 1 commit into from
Sep 18, 2024
Merged

[PEP 695] Fix covariance of frozen dataclasses #17783

merged 1 commit into from
Sep 18, 2024

Commits on Sep 18, 2024

  1. [PEP 695] Fix covariance of frozen dataclasses 

    Fix this conformance test:
```
@DataClass(frozen=True)
class ShouldBeCovariant4[T]:
    x: T

vo4_1: ShouldBeCovariant4[float] = ShouldBeCovariant4[int](1)  # OK
vo4_2: ShouldBeCovariant4[int] = ShouldBeCovariant4[float](1)  # E
```
Link:
https://github.com/python/typing/blob/main/conformance/tests/generics_variance_inference.py#L66
    @JukkaL
    JukkaL committed Sep 18, 2024
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