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## Summary We currently emit a diagnostic for code like the following: ```py from typing import Any # error: Invalid class base with type `GenericAlias` (all bases must be a class, `Any`, `Unknown` or `Todo`) class C(tuple[Any, ...]): ... ``` The changeset here silences this diagnostic by recognizing instances of `GenericAlias` in `ClassBase::try_from_type`, and inferring a `@Todo` type for them. This is a change in preparation for #17557, because `C` previously had `Unknown` in its MRO … ```py reveal_type(C.__mro__) # tuple[Literal[C], Unknown, Literal[object]] ``` … which would cause us to think that `C` is assignable to everything. The changeset also removes some false positive `invalid-base` diagnostics across the ecosystem. ## Test Plan Updated Markdown tests. |
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| .. | ||
| classes.md | ||
| functions.md | ||
| legacy.md | ||
| pep695.md | ||
| scoping.md | ||
| variance.md | ||