swift

c365ef32 - Sema: Handle protocol compositions containing type variables in matchTypes()

Sema: Handle protocol compositions containing type variables in matchTypes() We would previously fail to match something like (C<$T1> & P) against (C<Int> & P) when the constraint kind was <= Subtype, because we would fall back to a type equality test in that case. However, this was only valid for protocol compositions without superclass constraints since the superclass could contain a type variable on one side of the constraint. Fix this by adding support for protocol composition types to matchDeepEqualityTypes().