Add support for GCC ObjC extension "Class<protocol>". Sigh.

Found while researching <rdar://problem/6497631> Message lookup is sometimes different than gcc's.

Will never be seen in user code. Needed to pass dejagnu testsuite.

llvm-svn: 65244

1 files changed, 23 insertions, 0 deletions

diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index 830cc6a977e..cdd61cd3f4a 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -1394,6 +1394,29 @@ QualType ASTContext::getObjCQualifiedIdType(ObjCProtocolDecl **Protocols,
   return QualType(QType, 0);
 }
 
+/// getObjCQualifiedClassType - Return an ObjCQualifiedIdType for the 'Class'
+/// decl and the conforming protocol list.
+QualType ASTContext::getObjCQualifiedClassType(ObjCProtocolDecl **Protocols, 
+                                               unsigned NumProtocols) {
+  // Sort the protocol list alphabetically to canonicalize it.
+  SortAndUniqueProtocols(Protocols, NumProtocols);
+
+  llvm::FoldingSetNodeID ID;
+  ObjCQualifiedIdType::Profile(ID, Protocols, NumProtocols);
+  
+  void *InsertPos = 0;
+  if (ObjCQualifiedClassType *QT =
+        ObjCQualifiedClassTypes.FindNodeOrInsertPos(ID, InsertPos))
+    return QualType(QT, 0);
+  
+  // No Match;
+  ObjCQualifiedClassType *QType =
+    new (*this,8) ObjCQualifiedClassType(Protocols, NumProtocols);
+  Types.push_back(QType);
+  ObjCQualifiedClassTypes.InsertNode(QType, InsertPos);
+  return QualType(QType, 0);
+}
+
 /// getTypeOfExpr - Unlike many "get<Type>" functions, we can't unique
 /// TypeOfExpr AST's (since expression's are never shared). For example,
 /// multiple declarations that refer to "typeof(x)" all contain different