[PATCH] Preserve paramater attributes during template instantiation

[Doug Gregor]

  Two comments:

  1) I think you'll need to teach SemaTemplate.cpp's StripImplicitInstantiation() to strip the attributes off the parameters of a FunctionDecl, because a specialization should not inherit the parameter attributes from the implicit instantiation.

  2) Regarding the case that's not working, the problem is that Sema::SubstituteExplicitTemplateArguments is calling Sema::BuildFunctionType() directly, which takes a FunctionType::ExtInfo... which drops the consumed-arguments information present in FunctionProtoType::ExtProtoInfo. We need to propagate that consumed-arguments info here for the function types to match.

http://llvm-reviews.chandlerc.com/D474