libstdc++-v3/testsuite/20_util/time_point/nonmember/constexpr.cc

   1 // { dg-do compile }
   2 // { dg-options "-std=gnu++0x" }
   3
   4 // Copyright (C) 2011-2013 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 #include <chrono>
  22 #include <testsuite_hooks.h>
  23
  24 int main()
  25 {
  26   bool test __attribute__((unused)) = true;
  27   using namespace std::chrono;
  28
  29   typedef time_point<system_clock> time_type;
  30
  31   constexpr time_type t1(seconds(1));
  32   constexpr time_type t2(seconds(30));
  33   constexpr time_type t3(seconds(60));
  34
  35   constexpr duration<int> d0(12);
  36   constexpr duration<int> d1(3);
  37
  38   constexpr auto r1 __attribute__((unused)) = t1 + d0;
  39   constexpr auto r2 __attribute__((unused)) = d1 + t2;
  40
  41   constexpr auto r3 __attribute__((unused)) = t1 - d0;
  42   constexpr auto r4 __attribute__((unused)) = t2 - t3;
  43
  44   return 0;
  45 }