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

// Copyright (C) 2011 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 <tuple>

#include <type_traits>

#include <memory>

#include <testsuite_hooks.h>

template<typename T>

  typename std::decay<T>::type copy(T&& x)

  { return std::forward<T>(x); }

// libstdc++/48476

void test01()

{

  bool test __attribute__((unused)) = true;

  std::shared_ptr<int> p(new int()), q, r;

  std::tuple<std::shared_ptr<int>&, int>  t0(p, 23), t1(q, 0);

  t1 = copy(t0);  // shall be equivalent to

                  // q = p; std::get<1>(t1) = std::get<1>(t0);

  VERIFY( q == p );

  std::tuple<std::shared_ptr<int>&, char> t2(r, 0);

  t2 = copy(t1);  // shall be equivalent to

                  // r = q; std::get<1>(t2) = std::get<1>(t1);

  VERIFY( r == q );

}

int main()

{

  test01();

  return 0;

}