Modules occupy a weird space in the AST now: they can be treated like
types (Swift.Int), which is captured by ModuleType. They can be
treated like values for disambiguation (Swift.print), which is
captured by ModuleExpr. And we jump through hoops in various places to
store "either a module or a decl".
Start cleaning this up by transforming Module into ModuleDecl, a
TypeDecl that's implicitly created to describe a module. Subsequent
changes will start folding away the special cases (ModuleExpr ->
DeclRefExpr, name lookup results stop having a separate Module case,
etc.).
Note that the Module -> ModuleDecl typedef is there to limit the
changes needed. Much of this patch is actually dealing with the fact
that Module used to have Ctx and Name public members that now need to
be accessed via getASTContext() and getName(), respectively.
Swift SVN r28284
Separate InputFileKind from SourceFileKind, FrontendOptions will now use
InputFileKind, while Module will use SourceFileKind.
This is in preparation for adding an input file kind for LLVM IR.
rdar://19048891
Swift SVN r25555
This commit defines a schema and YAML serialization for a significant
portion of our AST. The API ingestion is a work in progress.
See design discussion in ModuleAPIDiff.cpp.
Swift SVN r23938
