Rename Selector::getName() to Selector::getAsString(), and add
a new NamedDecl::getAsString() method.

Change uses of Selector::getName() to just pass in a Selector 
where possible (e.g. to diagnostics) instead of going through
an std::string.

This also adds new formatters for objcinstance and objcclass
as described in the dox.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@59933 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/Sema.h b/lib/Sema/Sema.h
index 410c254..de588c5 100644
--- a/lib/Sema/Sema.h
+++ b/lib/Sema/Sema.h
@@ -1317,7 +1317,7 @@
   /// \param [out] ReturnType - The return type of the send.
   /// \return true iff there were any incompatible types.
   bool CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs, Selector Sel,
-                                 ObjCMethodDecl *Method, const char *PrefixStr,
+                                 ObjCMethodDecl *Method, bool isClassMessage,
                                  SourceLocation lbrac, SourceLocation rbrac,
                                  QualType &ReturnType);