| // { 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 [time.cal.year_month_day] |
| |
| #include <chrono> |
| #include <testsuite_hooks.h> |
| |
| // Slow but clear test for leap year. |
| constexpr bool |
| is_leap_year(const std::chrono::year& y) noexcept |
| { |
| const int n = static_cast<int>(y); |
| return n % 4 == 0 && (n % 100 != 0 || n % 400 == 0); |
| } |
| |
| void test01() |
| { |
| using namespace std::chrono; |
| |
| year y{-32767}; |
| while (y < year{32767}) { |
| VERIFY( y.is_leap() == is_leap_year(y) ); |
| ++y; |
| } |
| |
| // One more for y = 32767. |
| VERIFY( year{32767}.is_leap() == is_leap_year(year{32767}) ); |
| } |
| |
| int main() |
| { |
| test01(); |
| return 0; |
| } |