ObjectiveC: Handle the case of qualifying protocols

declared in a typedef declaraton used as super
class of an ObjC class. Curretnly, these protocols
are dropped from the class hierarchy. Test shows that
it is now included. // rdar://15051465

llvm-svn: 191395

1 files changed, 23 insertions, 0 deletions

diff --git a/clang/lib/Sema/SemaDeclObjC.cpp b/clang/lib/Sema/SemaDeclObjC.cpp
index b938bd6f8b0..14f8658face 100644
--- a/clang/lib/Sema/SemaDeclObjC.cpp
+++ b/clang/lib/Sema/SemaDeclObjC.cpp
@@ -592,6 +592,29 @@ ActOnStartClassInterface(SourceLocation AtInterfaceLoc,
   return ActOnObjCContainerStartDefinition(IDecl);
 }
 
+/// ActOnTypedefedProtocols - this action finds protocol list as part of the
+/// typedef'ed use for a qualified super class and adds them to the list
+/// of the protocols.
+void Sema::ActOnTypedefedProtocols(SmallVectorImpl<Decl *> &ProtocolRefs,
+                                   IdentifierInfo *SuperName,
+                                   SourceLocation SuperLoc) {
+  if (!SuperName)
+    return;
+  NamedDecl* IDecl = LookupSingleName(TUScope, SuperName, SuperLoc,
+                                      LookupOrdinaryName);
+  if (!IDecl)
+    return;
+  
+  if (const TypedefNameDecl *TDecl = dyn_cast_or_null<TypedefNameDecl>(IDecl)) {
+    QualType T = TDecl->getUnderlyingType();
+    if (T->isObjCObjectType())
+      if (const ObjCObjectType *OPT = T->getAs<ObjCObjectType>())
+        for (ObjCObjectType::qual_iterator I = OPT->qual_begin(),
+             E = OPT->qual_end(); I != E; ++I)
+          ProtocolRefs.push_back(*I);
+  }
+}
+
 /// ActOnCompatibilityAlias - this action is called after complete parsing of
 /// a \@compatibility_alias declaration. It sets up the alias relationships.
 Decl *Sema::ActOnCompatibilityAlias(SourceLocation AtLoc,