libstdc++-v3/testsuite/std/time/year_month_day/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]
  21
  22 #include <chrono>
  23
  24 constexpr void
  25 constexpr_year_month_day()
  26 {
  27   using namespace std::chrono;
  28   using ymd = year_month_day;
  29
  30   constexpr ymd ymd1{year{1984}, August, 3d};
  31   static_assert(ymd1.ok());
  32   static_assert(ymd1.year() == year{1984});
  33   static_assert(ymd1.month() == August);
  34   static_assert(ymd1.day() == 3d);
  35   //static_assert(sys_days(ymd1) == time_point_cast<days>(days{5356}));
  36   //static_assert(local_days(ymd1) == time_point_cast<days>(days{5356}));
  37
  38   static_assert(2015y/August/14d == ymd{year{2015}, month{8}, day{14}});
  39   static_assert(2015y/August/14 == ymd{year{2015}, month{8}, day{14}});
  40   static_assert(2015y/(August/14d) == ymd{year{2015}, month{8}, day{14}});
  41   static_assert(2015/(August/14d) == ymd{year{2015}, month{8}, day{14}});
  42   static_assert(August/14d/2015y == ymd{year{2015}, month{8}, day{14}});
  43   static_assert(August/14d/2015 == ymd{year{2015}, month{8}, day{14}});
  44
  45   static_assert(((ymd{1000y, January, 1d} += months{1}) += years{1})
  46                 == February/1d/1001y);
  47   static_assert(((ymd{1000y, January, 1d} -= years{1}) -= months{1})
  48                 == December/1d/998y);
  49
  50   static_assert(!ymd{1000y, February, 30d}.ok());
  51
  52   static_assert(June/1d/1977y == June/1d/1977y);
  53   static_assert(June/1d/1977y != June/1d/1987y);
  54   static_assert(May/15d/1950y <=> May/15d/1950y == std::strong_ordering::equal);
  55   static_assert(May/15d/1950y <=> May/14d/1950y == std::strong_ordering::greater);
  56   static_assert(April/15d/1950y <=> May/14d/1950y == std::strong_ordering::less);
  57
  58   static_assert(January/1d/1900y + months{13} == February/1d/1901y);
  59   static_assert(months{13} + January/1d/1900y == February/1d/1901y);
  60   static_assert(January/1d/1900y + years{1} == January/1d/1901y);
  61   static_assert(years{1} + January/1d/1900y == January/1d/1901y);
  62   static_assert(January/1d/1900y - months{13} == December/1d/1898y);
  63   static_assert(January/1d/1900y - years{1} == January/1d/1899y);
  64
  65   // N.B. unix seems to be a macro somewhere!
  66   constexpr ymd myunix = 1970y/1/1;
  67   static_assert(myunix.ok());
  68   static_assert(myunix.year() == year{1970});
  69   static_assert(myunix.month() == January);
  70   static_assert(myunix.day() == day{1});
  71   static_assert(sys_days(myunix).time_since_epoch() == days{0});
  72   //static_assert(local_days(myunix) == time_point_cast<days>(days{0}));
  73
  74   static_assert(sys_days{August/20d/2020y}.time_since_epoch() == days{18494});
  75
  76   static_assert(ymd{sys_days{2017y/January/0}}  == 2016y/December/31);
  77   static_assert(ymd{sys_days{2017y/January/31}} == 2017y/January/31);
  78   static_assert(ymd{sys_days{2017y/January/32}} == 2017y/February/1);
  79   static_assert(ymd{sys_days{2017y/33/59 + months{0}}} == 2019y/10/29);
  80
  81   static_assert(ymd{local_days{2017y/January/0}}  == 2016y/December/31);
  82   static_assert(ymd{local_days{2017y/January/31}} == 2017y/January/31);
  83   static_assert(ymd{local_days{2017y/January/32}} == 2017y/February/1);
  84   static_assert(ymd{local_days{2017y/33/59 + months{0}}} == 2019y/10/29);
  85
  86   static_assert((2000y/February/29d).ok());
  87   static_assert(!(2001y/February/29d).ok());
  88   static_assert(!(2100y/February/29d).ok());
  89   static_assert(!(1999y/February/29d).ok());
  90 }