libstdc++-v3/testsuite/std/time/year_month_weekday/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_weekday]
  21
  22 #include <chrono>
  23
  24 constexpr void
  25 constexpr_year_month_weekday()
  26 {
  27   using namespace std::chrono;
  28   using ymwd = year_month_weekday;
  29
  30   year_month_weekday ymwd1{};
  31   ymwd1 += months{9};
  32   ymwd1 -= months{9};
  33   ymwd1 += years{12};
  34   ymwd1 -= years{12};
  35
  36   constexpr ymwd ymwd2{year{1984}, month{August},
  37                        weekday_indexed{Wednesday, 3}};
  38   static_assert(ymwd2.ok());
  39   static_assert(ymwd2.year() == year{1984});
  40   static_assert(ymwd2.month() == August);
  41   static_assert(ymwd2.weekday() == Wednesday);
  42   static_assert(ymwd2.index() == 3);
  43   static_assert(ymwd2.weekday_indexed() == weekday_indexed{Wednesday, 3});
  44   static_assert(ymwd{sys_days{ymwd2}} == ymwd2);
  45   static_assert(ymwd{local_days{ymwd2}} == ymwd2);
  46
  47   static_assert(2015y/August/Friday[2] == ymwd{year{2015}, month{8}, weekday_indexed{weekday{5u}, 2}});
  48   static_assert(2015y/(August/Friday[2]) == ymwd{year{2015}, month{8}, weekday_indexed{weekday{5u}, 2}});
  49   static_assert(2015/(August/Friday[2]) == ymwd{year{2015}, month{8}, weekday_indexed{weekday{5u}, 2}});
  50   static_assert(August/Friday[2]/2015y == ymwd{year{2015}, month{8}, weekday_indexed{weekday{5u}, 2}});
  51   static_assert(August/Friday[2]/2015 == ymwd{year{2015}, month{8}, weekday_indexed{weekday{5u}, 2}});
  52
  53   static_assert(January/Tuesday[2]/1900y + months{1} == February/Tuesday[2]/1900y);
  54   static_assert(months{1} + January/Tuesday[2]/1900y == February/Tuesday[2]/1900y);
  55   static_assert(January/Tuesday[2]/1900y - months{1} == December/Tuesday[2]/1899y);
  56   static_assert(January/Tuesday[2]/1900y + years{1} == January/Tuesday[2]/1901y);
  57   static_assert(years{1} + January/Tuesday[2]/1900y == January/Tuesday[2]/1901y);
  58   static_assert(January/Tuesday[2]/1900y - years{1} == January/Tuesday[2]/1899y);
  59
  60   static_assert(January/Tuesday[1]/1900y != February/Tuesday[1]/1900y);
  61   static_assert(January/Tuesday[1]/1900y != January/Wednesday[1]/1900y);
  62   static_assert(January/Tuesday[1]/1900y != January/Tuesday[1]/1901y);
  63   static_assert(January/Tuesday[1]/1900y != January/Tuesday[2]/1900y);
  64
  65   // N.B. unix seems to be a macro somewhere!
  66   constexpr ymwd myunix(local_days{days{0}});
  67   static_assert(myunix.ok());
  68   static_assert(myunix.year() == year{1970});
  69   static_assert(myunix.month() == January);
  70   static_assert(myunix.weekday() == Thursday);
  71   static_assert(myunix.index() == 1);
  72   static_assert(myunix.weekday_indexed() == weekday_indexed{Thursday, 1});
  73   static_assert(ymwd{sys_days{myunix}} == myunix);
  74   static_assert(ymwd{local_days{myunix}} == myunix);
  75
  76   static_assert((2020y/August/Monday[5]).ok());
  77   static_assert(!(2020y/August/Tuesday[5]).ok());
  78 }