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

   1 // { dg-do compile { target c++17 } }
   2
   3 // Copyright (C) 2011-2022 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 <chrono>
  21 #include <testsuite_common_types.h>
  22 constexpr auto test_operators()
  23 {
  24   using namespace std::chrono;
  25   nanoseconds d1 { };
  26   time_point<system_clock> c1 { };
  27
  28   c1+=d1;
  29   c1-=d1;
  30
  31
  32   return 11;
  33 }
  34
  35 constexpr auto a = test_operators();