1 files changed, 17 insertions, 0 deletions
diff --git a/include/clang/AST/Attr.h b/include/clang/AST/Attr.h
index 61c57f9928..27dcef2a1e 100644
--- a/include/clang/AST/Attr.h
+++ b/include/clang/AST/Attr.h
@@ -129,10 +129,27 @@ protected:
 public:
   // Implement isa/cast/dyncast/etc.
   static bool classof(const Attr *A) {
+    // Relies on relative order of enum emission with respect to MS inheritance
+    // attrs.
     return A->getKind() <= attr::LAST_INHERITABLE_PARAM;
   }
 };
 
+class MSInheritanceAttr : public InheritableAttr {
+  virtual void anchor();
+protected:
+  MSInheritanceAttr(attr::Kind AK, SourceRange R, unsigned SpellingListIndex = 0)
+    : InheritableAttr(AK, R, SpellingListIndex) {}
+
+public:
+  // Implement isa/cast/dyncast/etc.
+  static bool classof(const Attr *A) {
+    // Relies on relative order of enum emission with respect to param attrs.
+    return (A->getKind() <= attr::LAST_MS_INHERITABLE &&
+            A->getKind() > attr::LAST_INHERITABLE_PARAM);
+  }
+};
+
 #include "clang/AST/Attrs.inc"
 
 }  // end namespace clang