Support new union syntax in stubs always in runtime context #10771
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Previously it only worked when the target Python version was 3.10. Work on #9880.
ilevkivskyi
approved these changes
Jul 6, 2021
| self.nesting_level = 0 | ||
| # Should we allow unnormalized types like `list[int]` | ||
| # (currently allowed in stubs)? | ||
| self.allow_unnormalized = allow_unnormalized |
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| accept_items(e.left) | ||
| accept_items(e.right) | ||
| else: | ||
| self.expr_checker.accept(e) |
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TBH I am not sure how this logic work correctly for A = list[int | None], maybe add a short comment?
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Previously it only worked when the target Python version was 3.10. Now type
aliases like these work in stubs on all Python versions:
Since type objects don't support
__or__before 3.10 (in typeshed), skip sometype checking of type alias definitions in stubs. Defensively only skip these things
in stubs, even though they could be redundant in other contexts as well.
Work on #9880.