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// { dg-do compile }
// { 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 <chrono>
#include <testsuite_hooks.h>
 
int main()
{
  bool test __attribute__((unused)) = true;
  using namespace std::chrono;
 
  typedef time_point<system_clock> time_type;
 
  constexpr time_type t1(seconds(1));
  constexpr time_type t2(seconds(30));
  constexpr time_type t3(seconds(60));
 
  constexpr duration<int> d0(12);
  constexpr duration<int> d1(3);
 
  constexpr auto r1 __attribute__((unused)) = t1 + d0;
  constexpr auto r2 __attribute__((unused)) = d1 + t2;
 
  constexpr auto r3 __attribute__((unused)) = t1 - d0;
  constexpr auto r4 __attribute__((unused)) = t2 - t3;
 
  return 0;
}