libstdc++-v3/testsuite/std/time/hh_mm_ss/1.cc

   1 // { dg-options "-std=gnu++2a" }
   2 // { dg-do compile { target c++2a } }
   3
   4 // Copyright (C) 2020-2021 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 // Class template hh_mm_ss [time.hh_mm_ss]
  22
  23 #include <chrono>
  24
  25 constexpr void
  26 constexpr_hh_mm_ss()
  27 {
  28   using namespace std::chrono;
  29   using std::ratio;
  30
  31   static_assert(hh_mm_ss<hours>::fractional_width == 0);
  32   static_assert(hh_mm_ss<minutes>::fractional_width == 0);
  33   static_assert(hh_mm_ss<seconds>::fractional_width == 0);
  34   static_assert(hh_mm_ss<milliseconds>::fractional_width == 3);
  35   static_assert(hh_mm_ss<microseconds>::fractional_width == 6);
  36   static_assert(hh_mm_ss<nanoseconds>::fractional_width == 9);
  37   static_assert(hh_mm_ss<duration<int, ratio<1, 2>>>::fractional_width == 1);
  38   static_assert(hh_mm_ss<duration<int, ratio<1, 3>>>::fractional_width == 6);
  39   static_assert(hh_mm_ss<duration<int, ratio<1, 4>>>::fractional_width == 2);
  40   static_assert(hh_mm_ss<duration<int, ratio<2, 4>>>::fractional_width == 1);
  41   static_assert(hh_mm_ss<duration<int, ratio<1, 5>>>::fractional_width == 1);
  42   static_assert(hh_mm_ss<duration<int, ratio<1, 6>>>::fractional_width == 6);
  43   static_assert(hh_mm_ss<duration<int, ratio<1, 7>>>::fractional_width == 6);
  44   static_assert(hh_mm_ss<duration<int, ratio<1, 8>>>::fractional_width == 3);
  45   static_assert(hh_mm_ss<duration<int, ratio<1, 9>>>::fractional_width == 6);
  46   static_assert(hh_mm_ss<duration<int, ratio<1, 10>>>::fractional_width == 1);
  47   static_assert(hh_mm_ss<duration<int, ratio<756, 625>>>::fractional_width == 4);
  48   static_assert(hh_mm_ss<duration<int, ratio<1, (1ll << 62)>>>::fractional_width
  49                 == 18);
  50
  51   constexpr auto hms = hh_mm_ss{-(8h + 9min + 10s + 11ms + 12us + 13ns)};
  52   static_assert(__is_same(decltype(hms)::precision, nanoseconds));
  53   static_assert(hms.hours() == 8h);
  54   static_assert(hms.minutes() == 9min);
  55   static_assert(hms.seconds() == 10s);
  56   static_assert(hms.subseconds() == 11ms + 12us + 13ns);
  57   static_assert(hms.is_negative());
  58   static_assert(hh_mm_ss{hms.to_duration()}.to_duration() == hms.to_duration());
  59
  60   static_assert(seconds{hh_mm_ss{100min}} == 100min);
  61
  62   // TODO: treat_as_floating_point_v
  63 }