| // { dg-options "-std=gnu++2a" } |
| // { dg-do compile { target c++2a } } |
| |
| // Copyright (C) 2020-2021 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 template day [time.cal.month_weekday] |
| |
| #include <chrono> |
| |
| constexpr void |
| constexpr_month_weekday() |
| { |
| using namespace std::chrono; |
| using mwd = month_weekday; |
| |
| // mwd0 is the third Tuesday of February of an as yet unspecified year. |
| constexpr auto mwd0 = February / Tuesday[3]; |
| static_assert(mwd0.ok()); |
| static_assert(mwd0.month() == February); |
| static_assert(mwd0.weekday_indexed() == Tuesday[3]); |
| |
| static_assert(!mwd{month{0}, Tuesday[3]}.ok()); |
| static_assert(!mwd{February, Tuesday[0]}.ok()); |
| |
| static_assert(mwd{January, Monday[2]} == mwd{January, Monday[2]}); |
| static_assert(mwd{January, Monday[2]} != mwd{January, Monday[3]}); |
| static_assert(mwd{February, Monday[2]} != mwd{January, Monday[2]}); |
| |
| static_assert(August/Friday[2] == mwd{month{8}, weekday_indexed{weekday{5u}, 2}}); |
| static_assert(8/Friday[2] == mwd{month{8}, weekday_indexed{weekday{5u}, 2}}); |
| static_assert(Friday[2]/August == mwd{month{8}, weekday_indexed{weekday{5u}, 2}}); |
| static_assert(Friday[2]/8 == mwd{month{8}, weekday_indexed{weekday{5u}, 2}}); |
| } |