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// { dg-options "-std=gnu++0x" }

// Copyright (C) 2010 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library is free

// software; you can redistribute it and/or modify it under the

// terms of the GNU General Public License as published by the

// Free Software Foundation; either version 3, or (at your option)

// any later version.

//

// This library is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License along

// with this library; see the file COPYING3.  If not see

// <http://www.gnu.org/licenses/>.

#include <list>

#include <testsuite_hooks.h>

template <class T>

  struct C

  {

    T t_;

    template <class U,

              class = typename std::enable_if

                    <

                        !std::is_lvalue_reference<U>::value

                    >::type>

      C(U&& u) : t_(std::forward<T>(std::move(u).get())) {}

  };

class A

{

  int data_;

public:

  explicit

  A(int data = 1)

  : data_(data) { }

  ~A() { data_ = -1; }

  void test() const

  {

    bool test __attribute__((unused)) = true;

    VERIFY( data_ == 3 );

  }

};

class Awrap

{

  A a_;

public:

  explicit Awrap(const A& a) : a_(a) { }

  A get() const { return a_; }

};

template <class C>

void test(C c)

{

  c.t_.test();

}

// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2009/n2951.html

// Test B.

int main()

{

  std::list<C<A> > list;

  A a(3);

  C<A> c((Awrap(a)));

  list.push_back(c);

  test(c);

  test(list.front());

}