libstdc++-v3/testsuite/20_util/time_point/requirements/noexcept.cc

   1 // Copyright (C) 2019-2021 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-do compile { target c++11 } }
  19
  20 // P0972R0 <chrono> zero(), min(), and max() should be noexcept
  21
  22 #include <chrono>
  23
  24 using namespace std;
  25
  26 using tp1 = chrono::system_clock::time_point;
  27 static_assert( noexcept(tp1::min()), "time_point::min()" );
  28 static_assert( noexcept(tp1::max()), "time_point::max()" );
  29
  30 struct Clock {
  31   using rep = int;
  32   using period = ratio<1, 24>;
  33   using duration = chrono::duration<rep, period>;
  34   using time_point = chrono::time_point<Clock>;
  35   static constexpr bool is_steady = false;
  36   static time_point now() noexcept;
  37 };
  38
  39 using tp2 = Clock::time_point;
  40 static_assert( noexcept(tp2::min()), "time_point::min()" );
  41 static_assert( noexcept(tp2::max()), "time_point::max()" );
  42
  43 using tp3 = chrono::time_point<Clock, chrono::duration<long, ratio<10>>>;
  44 static_assert( noexcept(tp3::min()), "time_point::min()" );
  45 static_assert( noexcept(tp3::max()), "time_point::max()" );