Imported Upstream version 1.69.0upstream/1.69.0

1 files changed, 13 insertions, 1 deletions

diff --git a/boost/assign/std/stack.hpp b/boost/assign/std/stack.hpp
index e528f169b1..5b0e07c9c6 100644
--- a/boost/assign/std/stack.hpp
+++ b/boost/assign/std/stack.hpp
@@ -17,12 +17,14 @@
 
 #include <boost/assign/list_inserter.hpp>
 #include <boost/config.hpp>
+#include <boost/move/utility.hpp>
 #include <stack>
 
 namespace boost
 {
 namespace assign
 {
+#if defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
 
     template< class V, class C, class V2 >
     inline list_inserter< assign_detail::call_push< std::stack<V,C> >, V >
@@ -30,7 +32,17 @@ namespace assign
     {
        return push( c )( v );
     }
-    
+
+#else
+
+    template< class V, class C, class V2 >
+    inline list_inserter< assign_detail::call_push< std::stack<V, C> >, V >
+    operator+=(std::stack<V, C>& c, V2&& v)
+    {
+        return push(c)(boost::forward<V2>(v));
+    }
+
+#endif
 }
 }