Joe Groff 8e6b353542 Derive conformances of Equatable and Hashable for simple enums. ...

If an enum has no cases with payloads, make it implicitly Equatable and Hashable, and derive default implementations of '==' and 'hashValue'. Insert the derived '==' into module context wrapped in a new DerivedFileUnit kind, and arrange for it to be codegenned with the deriving EnumDecl by adding a 'DerivedOperatorDecls' array to NominalTypeDecls that gets visited at SILGen time.

Swift SVN r14471

2014-02-27 20:28:38 +00:00

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