Twine: Explicitly default the copy ctor as it's otherwise deprecated in C++11 by the presence of a user-declared copy assignment operator.

llvm-svn: 231094

1 files changed, 2 insertions, 0 deletions

diff --git a/llvm/include/llvm/ADT/Twine.h b/llvm/include/llvm/ADT/Twine.h
index 9e9a4e1ad2c..5f8909e88a1 100644
--- a/llvm/include/llvm/ADT/Twine.h
+++ b/llvm/include/llvm/ADT/Twine.h
@@ -257,6 +257,8 @@ namespace llvm {
       assert(isValid() && "Invalid twine!");
     }
 
+    Twine(const Twine &) = default;
+
     /// Construct from a C string.
     ///
     /// We take care here to optimize "" into the empty twine -- this will be