2 commits

Author	SHA1	Message	Date
Douglas Creager	2cf5cba7ff	[ty] Check base classes when determining subtyping etc for generic aliases (#17927) ... #17897 added variance handling for legacy typevars — but they were only being considered when checking generic aliases of the same class: ```py class A: ... class B(A): ... class C[T]: ... static_assert(is_subtype_of(C[B], C[A])) ``` and not for generic subclasses: ```py class D[U](C[U]): ... static_assert(is_subtype_of(D[B], C[A])) ``` Now we check those too! Closes https://github.com/astral-sh/ty/issues/101	2025-05-07 15:21:11 -04:00
Douglas Creager	0d9b6a0975	[ty] Handle explicit variance in legacy typevars (#17897) ... We now track the variance of each typevar, and obey the `covariant` and `contravariant` parameters to the legacy `TypeVar` constructor. We still don't yet infer variance for PEP-695 typevars or for the `infer_variance` legacy constructor parameter. --------- Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com> Co-authored-by: Carl Meyer <carl@astral.sh>	2025-05-07 08:44:51 -04:00