| // { dg-options "-std=gnu++2a" } |
| // { dg-do run { target c++2a } } |
| |
| // Copyright (C) 2021 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| // Class year_month_day [time.cal.year_month_day] |
| |
| #include <chrono> |
| #include <testsuite_hooks.h> |
| |
| // Slow but very clear way of advancing one day. |
| constexpr void |
| advance(std::chrono::year_month_day& ymd) noexcept { |
| |
| using namespace std::chrono; |
| |
| auto y = ymd.year(); |
| auto m = ymd.month(); |
| auto d = ymd.day(); |
| |
| if (d != year_month_day_last{year{y}, month_day_last{m}}.day()) |
| ++d; |
| else { |
| d = day{1}; |
| if (m != December) |
| ++m; |
| else { |
| m = January; |
| ++y; |
| } |
| } |
| ymd = year_month_day{y, m, d}; |
| } |
| |
| void test01() |
| { |
| using namespace std::chrono; |
| |
| // [-12687428, 11248737] maps to [-32767y/January/1d, 32767y/December/31d] |
| |
| auto n = days{-12687428}; |
| auto ymd = -32767y/January/1d; |
| while (n < days{11248737}) { |
| VERIFY( year_month_day{sys_days{n}} == ymd ); |
| ++n; |
| advance(ymd); |
| } |
| // One more for n = 11248737 and ymd = 32767y/December/31d |
| VERIFY( 32767y/December/31d == year_month_day{sys_days{days{11248737}}} ); |
| } |
| |
| int main() |
| { |
| test01(); |
| return 0; |
| } |