<rdar://problem/13278115> Improve diagnostic when failing to bind an rvalue reference to an lvalue of compatible type.

llvm-svn: 178095

1 files changed, 8 insertions, 0 deletions

diff --git a/clang/lib/Sema/SemaInit.cpp b/clang/lib/Sema/SemaInit.cpp
index 8516422e4df..63309e376ea 100644
--- a/clang/lib/Sema/SemaInit.cpp
+++ b/clang/lib/Sema/SemaInit.cpp
@@ -3518,6 +3518,14 @@ static void TryReferenceInitializationCore(Sema &S,
       return;
     }
 
+    if ((RefRelationship == Sema::Ref_Compatible ||
+         RefRelationship == Sema::Ref_Compatible_With_Added_Qualification) &&
+        isRValueRef && InitCategory.isLValue()) {
+      Sequence.SetFailed(
+        InitializationSequence::FK_RValueReferenceBindingToLValue);
+      return;
+    }
+
     Sequence.SetFailed(InitializationSequence::FK_ReferenceInitDropsQualifiers);
     return;
   }