gh-91162: Disallow tuple[T][*anything] #92255
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Oops, sorry - while implementing another PR, I realised this is probably going to conflict with something else we'll need to do in |
| complexity to typing.py). This spec is currently being discussed at | ||
| https://github.com/python/cpython/issues/91162. | ||
| Note that not all the rules governing substitution behavior at runtime | ||
| is codified in PEPs; the source of truth for these tests is the tests |
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| is codified in PEPs; the source of truth for these tests is the tests | |
| are codified in PEPs; the source of truth for these tests is the tests |
| @@ -876,6 +876,15 @@ def __repr__(self): | |||
| return f'ForwardRef({self.__forward_arg__!r}{module_repr})' | |||
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| def _is_unpacked_type(x: Any) -> bool: | |||
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| def _is_unpacked_type(x: Any) -> bool: | |
| def _is_unpacked_type(x: object) -> bool: |
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Thanks for the quick review anyway Jelle :) I'll integrate those suggestions in the upcoming PR. |
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We agreed in #91162 that unpacked type arguments should only be valid to generic aliases that can accept a variable number of arguments - that is, unpacked type arguments should only be valid to generic aliases with a TypeVarTuple in the type parameters.
@JelleZijlstra Could I ask you for review on this?
(This PR is based on #92249, so there are a couple of extra commits. See the latest commit for the one that's actually part of this PR. I think I should be able to effectively hide the changes from the extra commits once #92249 is merged - so we can start review on this PR now?)