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gh-98852: Fix subscription of type aliases (GH-98920)
Fix subscription of type aliases containing bare generic types or types like TypeVar: for example tuple[A, T][int] and tuple[TypeVar, T][int], where A is a generic type, and T is a type variable.
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@ -3916,6 +3916,34 @@ class GenericTests(BaseTestCase):
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# C version of GenericAlias
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self.assertEqual(list[A()].__parameters__, (T,))
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def test_non_generic_subscript(self):
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T = TypeVar('T')
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class G(Generic[T]):
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pass
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class A:
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__parameters__ = (T,)
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for s in (int, G, A, List, list,
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TypeVar, TypeVarTuple, ParamSpec,
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types.GenericAlias, types.UnionType):
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for t in Tuple, tuple:
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with self.subTest(tuple=t, sub=s):
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self.assertEqual(t[s, T][int], t[s, int])
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self.assertEqual(t[T, s][int], t[int, s])
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a = t[s]
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with self.assertRaises(TypeError):
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a[int]
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for c in Callable, collections.abc.Callable:
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with self.subTest(callable=c, sub=s):
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self.assertEqual(c[[s], T][int], c[[s], int])
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self.assertEqual(c[[T], s][int], c[[int], s])
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a = c[[s], s]
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with self.assertRaises(TypeError):
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a[int]
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class ClassVarTests(BaseTestCase):
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def test_basics(self):
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