Commits
Eli Friedman committed 4ca443d0f59
Add OneOfDecl; use it as a DeclContext for OneOfElementDecls instead of OneOfType, and get rid of the implicit TypeAliasDecl. Add TypeDecl as a base class for OneOfDecl and TypeAliasDecl (and StructDecl, once we have it). Adjust a whole bunch of stuff to this new scheme. Swift SVN r1774