[cfe-commits] [PATCH][MS][Review request] - Microsoft function specialization at scope scope

[Francois Pichet]

I struggled getting this patch right and I am not confident enough to
submit it directly without review so here it is:
Template function specialization at class scope for -fms-extensions

Example:
template <class T>
class B {
public:
   template <class U>
   void f(U p) {   }

   template <>
    void f(int p) {	}  // <= not standard C++, Microsoft extension
};

As Doug suggested to me on the IRC chat, I created a new Decl node:
ClassScopeFunctionSpecializationDecl
This node hold a temporary CXXMethodDecl and it will use it to create
an explicit specialization during class instantiation.

This patch is necessary to parse the MSVC 2010, MFC and ATL code.
PS: I'll add serialization in a follow-up patch.
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