sync with N3126

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@113101 91177308-0d34-0410-b5e6-96231b3b80d8

test/containers/container.adaptors/stack/stack.defn/assign_move.pass.cpp

@@ -0,0 +1,42 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <stack>
+
+// stack& operator=(stack&& q);
+
+#include <stack>
+#include <cassert>
+
+#include "../../../../MoveOnly.h"
+
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+
+template <class C>
+C
+make(int n)
+{
+    C c;
+    for (int i = 0; i < n; ++i)
+        c.push_back(MoveOnly(i));
+    return c;
+}
+
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+
+int main()
+{
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+    std::stack<MoveOnly> q(make<std::deque<MoveOnly> >(5));
+    std::stack<MoveOnly> q2;
+    q2 = std::move(q);
+    assert(q2.size() == 5);
+    assert(q.empty());
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+}