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/emplace.pass.cpp

@@ -0,0 +1,29 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <stack>
+
+// template <class... Args> void emplace(Args&&... args);
+
+#include <stack>
+#include <cassert>
+
+#include "../../../../Emplaceable.h"
+
+int main()
+{
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+    std::stack<Emplaceable> q;
+    q.emplace(1, 2.5);
+    q.emplace(2, 3.5);
+    q.emplace(3, 4.5);
+    assert(q.size() == 3);
+    assert(q.top() == Emplaceable(3, 4.5));
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+}