Consider non-empty enums assignable to Self#19779
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ilevkivskyi merged 2 commits intopython:masterfrom Sep 2, 2025
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According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅ |
ilevkivskyi
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Sep 2, 2025
A5rocks
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Sep 3, 2025
| self.fail("Self type cannot be used in a metaclass", t) | ||
| if self.api.type.self_type is not None: | ||
| if self.api.type.is_final: | ||
| if self.api.type.is_final or self.api.type.is_enum and self.api.type.enum_members: |
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Should enums have is_final set maybe, so they opt into all behaviors like this?
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Yeah, I was thinking about this. We can try this in a separate PR (this may also simplify a bit some of the mypyc code related to final enums).
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Fixes #18345.
Fixes #16558.
See the linked ticket for reasoning - enums with members are implicitly final and should be treated exactly as if they were decorated with
@final.