Implement PointerLikeTypeTraits for DeclGroupRef.

Make OpaquePtr work with things that are pointer-like but not
necessarily pointers.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67998 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 17 insertions, 0 deletions

diff --git a/include/clang/AST/DeclGroup.h b/include/clang/AST/DeclGroup.h
index 3a57281bc0..b1c2575361 100644
--- a/include/clang/AST/DeclGroup.h
+++ b/include/clang/AST/DeclGroup.h
@@ -134,4 +134,21 @@ public:
 };
   
 } // end clang namespace
+
+namespace llvm {
+  // DeclGroupRef is "like a pointer", implement PointerLikeTypeTraits.
+  template <typename T>
+  class PointerLikeTypeTraits;
+  template <>
+  class PointerLikeTypeTraits<clang::DeclGroupRef> {
+  public:
+    static inline void *getAsVoidPointer(clang::DeclGroupRef P) {
+      return P.getAsOpaquePtr();
+    }
+    static inline clang::DeclGroupRef getFromVoidPointer(void *P) {
+      return clang::DeclGroupRef::getFromOpaquePtr(P);
+    }
+    enum { NumLowBitsAvailable = 0 };
+  };
+}
 #endif