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

   1 // { dg-do compile { target c++20 } }
   2
   3 // Copyright (C) 2020-2024 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 // Class template day [time.cal.year_month_day_last]
  21
  22 #include <chrono>
  23
  24 constexpr void
  25 constexpr_year_month_day_last()
  26 {
  27   using namespace std::chrono;
  28   using mdl = month_day_last;
  29   using ymdl = year_month_day_last;
  30
  31   year_month_day_last ymdl1{year{1066}, mdl{October}};
  32   ymdl1 += months{9};
  33   ymdl1 -= months{9};
  34   ymdl1 += years{12};
  35   ymdl1 -= years{12};
  36
  37   constexpr ymdl ymdl2{year{1984}, mdl{August}};
  38   static_assert(ymdl2.year() == year{1984});
  39   static_assert(ymdl2.month() == August);
  40   static_assert(ymdl2.month_day_last() == mdl{August});
  41   static_assert(ymdl2.day() == day{31});
  42   static_assert(sys_days(ymdl2).time_since_epoch().count() == 5356);
  43   static_assert(local_days(ymdl2).time_since_epoch().count() == 5356);
  44
  45   static_assert( (ymdl{year{1984}, mdl{August}}.ok()));
  46   static_assert(!(ymdl{year{1984}, mdl{month{13}}}.ok()));
  47
  48   static_assert(2015y/August/last == ymdl{year{2015}, month_day_last{month{8}}});
  49   static_assert(2015y/(August/last) == ymdl{year{2015}, month_day_last{month{8}}});
  50   static_assert(2015/(August/last) == ymdl{year{2015}, month_day_last{month{8}}});
  51   static_assert(August/last/2015y == ymdl{year{2015}, month_day_last{month{8}}});
  52   static_assert(August/last/2015 == ymdl{year{2015}, month_day_last{month{8}}});
  53
  54   static_assert(January/last/2000 <=> January/last/2000
  55                 == std::strong_ordering::equal);
  56   static_assert(January/last/2000 <=> February/last/2000
  57                 == std::strong_ordering::less);
  58   static_assert(January/last/2000 <=> January/last/1999
  59                 == std::strong_ordering::greater);
  60
  61   static_assert(January/last/2000 + months{13} == February/last/2001);
  62   static_assert(January/last/2000 + months{-1} == December/last/1999);
  63   static_assert(January/last/2000 - months{13} == December/last/1998);
  64   static_assert(January/last/2000 - months{-13} == February/last/2001);
  65
  66   static_assert(January/last/2000 + years{5} == January/last/2005);
  67   static_assert(January/last/2000 - years{5} == January/last/1995);
  68
  69   static_assert(year_month_day{January/last/2000} == January/31/2000);
  70   static_assert(year_month_day{February/last/2000} == February/29/2000);
  71   static_assert(year_month_day{March/last/2000} == March/31/2000);
  72   static_assert(year_month_day{April/last/2000} == April/30/2000);
  73   static_assert(year_month_day{May/last/2000} == May/31/2000);
  74   static_assert(year_month_day{June/last/2000} == June/30/2000);
  75   static_assert(year_month_day{July/last/2000} == July/31/2000);
  76   static_assert(year_month_day{August/last/2000} == August/31/2000);
  77   static_assert(year_month_day{September/last/2000} == September/30/2000);
  78   static_assert(year_month_day{October/last/2000} == October/31/2000);
  79   static_assert(year_month_day{November/last/2000} == November/30/2000);
  80   static_assert(year_month_day{December/last/2000} == December/31/2000);
  81 }