Slava Pestov 2d83a79c2c AST: Remove TypeDecl::getDeclaredType() ...

A pointless use of polymorphism -- the result values are not
interchangeable in any practical sense:

- For GenericTypeParamDecls, this returned getDeclaredInterfaceType(),
  which is an interface type.

- For AssociatedTypeDecls, this returned the sugared AssociatedTypeType,
  which desugars to an archetype.

- For TypeAliasDecls, this returned TypeAliasDecl::getAliasType(),
  which desugars to a type containing archetypes.

- For NominalTypeDecls, this returned NominalTypeDecl::getDeclaredType(),
  which is the unbound generic type, a special case used for inferring
  generic arguments when they're not written in source.

2016-12-01 13:00:18 -08:00

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