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// { dg-do compile { target c++20 } }
// Copyright (C) 2020-2024 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}});
}
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