Add an ActOnFriendDecl and call it for friend class decls.

llvm-svn: 71482

clang/include/clang/Parse/Action.h

@@ -933,6 +933,13 @@ public:
     return DeclPtrTy();
   }
 
+  /// ActOnFriendDecl - This action is called when a friend declaration is
+  /// encountered. Returns false on success.
+  virtual bool ActOnFriendDecl(Scope *S, SourceLocation FriendLoc,
+                               DeclPtrTy Dcl) {
+    return false;
+  }
+  
 
   //===------------------------- C++ Expressions --------------------------===//
 

clang/include/clang/Parse/DeclSpec.h

@@ -284,6 +284,7 @@ public:
   
   bool SetFriendSpec(SourceLocation Loc, const char *&PrevSpec);
   bool isFriendSpecified() const { return Friend_specified; }
+  SourceLocation getFriendSpecLoc() const { return FriendLoc; }
 
   /// AddAttributes - contatenates two attribute lists. 
   /// The GCC attribute syntax allows for the following:

clang/lib/Parse/ParseDeclCXX.cpp

@@ -525,10 +525,18 @@ void Parser::ParseClassSpecifier(tok::TokenKind TagTokKind,
   }
 
   const char *PrevSpec = 0;
-  if (TagOrTempResult.isInvalid())
+  if (TagOrTempResult.isInvalid()) {
     DS.SetTypeSpecError();
-  else if (DS.SetTypeSpecType(TagType, StartLoc, PrevSpec, 
-                              TagOrTempResult.get().getAs<void>()))
+    return;
+  }
+  
+  if (DS.isFriendSpecified() && 
+      !Actions.ActOnFriendDecl(CurScope, DS.getFriendSpecLoc(), 
+                               TagOrTempResult.get()))
+    return;
+    
+  if (DS.SetTypeSpecType(TagType, StartLoc, PrevSpec, 
+                         TagOrTempResult.get().getAs<void>()))
     Diag(StartLoc, diag::err_invalid_decl_spec_combination) << PrevSpec;
 }