4 files changed, 24 insertions, 4 deletions
diff --git a/clang/include/clang-c/Index.h b/clang/include/clang-c/Index.h
index fa35d058e5d..75ad31a0618 100644
--- a/clang/include/clang-c/Index.h
+++ b/clang/include/clang-c/Index.h
@@ -810,7 +810,8 @@ enum CXCursorKind {
 
   CXCursor_IBActionAttr                  = 401,
   CXCursor_IBOutletAttr                  = 402,
-  CXCursor_LastAttr                      = CXCursor_IBOutletAttr,
+  CXCursor_IBOutletCollectionAttr        = 403,
+  CXCursor_LastAttr                      = CXCursor_IBOutletCollectionAttr,
      
   /* Preprocessing */
   CXCursor_PreprocessingDirective        = 500,
diff --git a/clang/include/clang/AST/Attr.h b/clang/include/clang/AST/Attr.h
index 6bdb4a2fb62..f41fbf9bcf3 100644
--- a/clang/include/clang/AST/Attr.h
+++ b/clang/include/clang/AST/Attr.h
@@ -23,9 +23,10 @@ using llvm::dyn_cast;
 
 namespace clang {
   class ASTContext;
+  class IdentifierInfo;
+  class ObjCInterfaceDecl;
 }
 
-
 // Defined in ASTContext.h
 void *operator new(size_t Bytes, clang::ASTContext &C,
                    size_t Alignment = 16) throw ();
@@ -63,6 +64,7 @@ public:
     GNUInline,
     Hiding,
     IBOutletKind, // Clang-specific. Use "Kind" suffix to not conflict w/ macro.
+    IBOutletCollectionKind, // Clang-specific.
     IBActionKind, // Clang-specific. Use "Kind" suffix to not conflict w/ macro.
     Malloc,
     NoDebug,
@@ -318,6 +320,23 @@ public:
   static bool classof(const IBOutletAttr *A) { return true; }
 };
 
+class IBOutletCollectionAttr : public Attr {
+  const ObjCInterfaceDecl *D;
+public:
+  IBOutletCollectionAttr(const ObjCInterfaceDecl *d = 0)
+    : Attr(IBOutletCollectionKind), D(d) {}
+
+  const ObjCInterfaceDecl *getClass() const { return D; }
+
+  virtual Attr *clone(ASTContext &C) const;
+
+  // Implement isa/cast/dyncast/etc.
+  static bool classof(const Attr *A) {
+    return A->getKind() == IBOutletCollectionKind;
+  }
+  static bool classof(const IBOutletCollectionAttr *A) { return true; }
+};
+
 class IBActionAttr : public Attr {
 public:
   IBActionAttr() : Attr(IBActionKind) {}
diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td b/clang/include/clang/Basic/DiagnosticSemaKinds.td
index 2298f6a3e91..03c9c0e7e46 100644
--- a/clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -957,8 +957,7 @@ def err_attribute_regparm_invalid_number : Error<
 
 // Clang-Specific Attributes
 def err_attribute_iboutlet : Error<
-  "iboutlet attribute can only be applied to instance variables or "
-  "properties">;
+  "%0 attribute can only be applied to instance variables or properties">;
 def err_attribute_ibaction: Error<
   "ibaction attribute can only be applied to Objective-C instance methods">;
 def err_attribute_overloadable_not_function : Error<
diff --git a/clang/include/clang/Parse/AttributeList.h b/clang/include/clang/Parse/AttributeList.h
index 68d6f22c9b6..1e6d3ab9760 100644
--- a/clang/include/clang/Parse/AttributeList.h
+++ b/clang/include/clang/Parse/AttributeList.h
@@ -55,6 +55,7 @@ public:
   enum Kind {             // Please keep this list alphabetized.
     AT_IBAction,          // Clang-specific.
     AT_IBOutlet,          // Clang-specific.
+    AT_IBOutletCollection, // Clang-specific.
     AT_address_space,
     AT_alias,
     AT_aligned,