1// { dg-options "-std=gnu++11" }
2
3// Copyright (C) 2011-2015 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library.  This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14// GNU General Public License for more details.
15
16// You should have received a copy of the GNU General Public License along
17// with this library; see the file COPYING3.  If not see
18// <http://www.gnu.org/licenses/>.
19
20#include <tuple>
21#include <type_traits>
22#include <memory>
23#include <testsuite_hooks.h>
24
25template<typename T>
26  typename std::decay<T>::type copy(T&& x)
27  { return std::forward<T>(x); }
28
29// libstdc++/48476
30void test01()
31{
32  bool test __attribute__((unused)) = true;
33
34  std::shared_ptr<int> p(new int()), q, r;
35
36  std::tuple<std::shared_ptr<int>&, int>  t0(p, 23), t1(q, 0);
37  t1 = copy(t0);  // shall be equivalent to
38                  // q = p; std::get<1>(t1) = std::get<1>(t0);
39  VERIFY( q == p );
40
41  std::tuple<std::shared_ptr<int>&, char> t2(r, 0);
42  t2 = copy(t1);  // shall be equivalent to
43                  // r = q; std::get<1>(t2) = std::get<1>(t1);
44  VERIFY( r == q );
45}
46
47int main()
48{
49  test01();
50  return 0;
51}
52