Slava Pestov a1c03db381 AST: Generalize ProtocolDecl::getRequirementSignature() to a new RequirementSignature type ...

The RequirementSignature generalizes the old ArrayRef<Requirement>
which stores the minimal requirements that a conforming type's
witnesses must satisfy, to also record the protocol typealiases
defined in the protocol.

2022-02-13 00:24:23 -05:00

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