From 66e9977ddd6b197317d149213b76a9af0d3df4de Mon Sep 17 00:00:00 2001
From: Anders Carlsson <andersca@mac.com>
Date: Mon, 11 May 2009 22:27:47 +0000
Subject: [PATCH] Add an ActOnFriendDecl and call it for friend class decls.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@71482 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/clang/Parse/Action.h   |  7 +++++++
 include/clang/Parse/DeclSpec.h |  1 +
 lib/Parse/ParseDeclCXX.cpp     | 14 +++++++++++---
 3 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/include/clang/Parse/Action.h b/include/clang/Parse/Action.h
index f70c9f0591..f41e465fe0 100644
--- a/include/clang/Parse/Action.h
+++ b/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 --------------------------===//
 
diff --git a/include/clang/Parse/DeclSpec.h b/include/clang/Parse/DeclSpec.h
index 9528298109..efb7d65c2d 100644
--- a/include/clang/Parse/DeclSpec.h
+++ b/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:
diff --git a/lib/Parse/ParseDeclCXX.cpp b/lib/Parse/ParseDeclCXX.cpp
index e1e81ec33d..da99ab9aa2 100644
--- a/lib/Parse/ParseDeclCXX.cpp
+++ b/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;
 }
 
-- 
2.40.0