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

   1 // { dg-options "-std=gnu++2a" }
   2 // { dg-do compile { target c++2a } }
   3
   4 // Copyright (C) 2020-2022 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 day [time.cal.year_month_day_last]
  22
  23 #include <chrono>
  24
  25 constexpr void
  26 constexpr_year_month_day_last()
  27 {
  28   using namespace std::chrono;
  29   using mdl = month_day_last;
  30   using ymdl = year_month_day_last;
  31
  32   year_month_day_last ymdl1{year{1066}, mdl{October}};
  33   ymdl1 += months{9};
  34   ymdl1 -= months{9};
  35   ymdl1 += years{12};
  36   ymdl1 -= years{12};
  37
  38   constexpr ymdl ymdl2{year{1984}, mdl{August}};
  39   static_assert(ymdl2.year() == year{1984});
  40   static_assert(ymdl2.month() == August);
  41   static_assert(ymdl2.month_day_last() == mdl{August});
  42   static_assert(ymdl2.day() == day{31});
  43   static_assert(sys_days(ymdl2).time_since_epoch().count() == 5356);
  44   static_assert(local_days(ymdl2).time_since_epoch().count() == 5356);
  45
  46   static_assert( (ymdl{year{1984}, mdl{August}}.ok()));
  47   static_assert(!(ymdl{year{1984}, mdl{month{13}}}.ok()));
  48
  49   static_assert(2015y/August/last == ymdl{year{2015}, month_day_last{month{8}}});
  50   static_assert(2015y/(August/last) == ymdl{year{2015}, month_day_last{month{8}}});
  51   static_assert(2015/(August/last) == ymdl{year{2015}, month_day_last{month{8}}});
  52   static_assert(August/last/2015y == ymdl{year{2015}, month_day_last{month{8}}});
  53   static_assert(August/last/2015 == ymdl{year{2015}, month_day_last{month{8}}});
  54
  55   static_assert(January/last/2000 <=> January/last/2000
  56                 == std::strong_ordering::equal);
  57   static_assert(January/last/2000 <=> February/last/2000
  58                 == std::strong_ordering::less);
  59   static_assert(January/last/2000 <=> January/last/1999
  60                 == std::strong_ordering::greater);
  61
  62   static_assert(January/last/2000 + months{13} == February/last/2001);
  63   static_assert(January/last/2000 + months{-1} == December/last/1999);
  64   static_assert(January/last/2000 - months{13} == December/last/1998);
  65   static_assert(January/last/2000 - months{-13} == February/last/2001);
  66
  67   static_assert(January/last/2000 + years{5} == January/last/2005);
  68   static_assert(January/last/2000 - years{5} == January/last/1995);
  69
  70   static_assert(year_month_day{January/last/2000} == January/31/2000);
  71   static_assert(year_month_day{February/last/2000} == February/29/2000);
  72   static_assert(year_month_day{March/last/2000} == March/31/2000);
  73   static_assert(year_month_day{April/last/2000} == April/30/2000);
  74   static_assert(year_month_day{May/last/2000} == May/31/2000);
  75   static_assert(year_month_day{June/last/2000} == June/30/2000);
  76   static_assert(year_month_day{July/last/2000} == July/31/2000);
  77   static_assert(year_month_day{August/last/2000} == August/31/2000);
  78   static_assert(year_month_day{September/last/2000} == September/30/2000);
  79   static_assert(year_month_day{October/last/2000} == October/31/2000);
  80   static_assert(year_month_day{November/last/2000} == November/30/2000);
  81   static_assert(year_month_day{December/last/2000} == December/31/2000);
  82 }