47 lines
1.8 KiB
C++
47 lines
1.8 KiB
C++
// { dg-do compile { target c++20 } }
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// Copyright (C) 2020-2024 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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// Class template day [time.cal.month_weekday]
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#include <chrono>
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constexpr void
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constexpr_month_weekday()
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{
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using namespace std::chrono;
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using mwd = month_weekday;
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// mwd0 is the third Tuesday of February of an as yet unspecified year.
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constexpr auto mwd0 = February / Tuesday[3];
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static_assert(mwd0.ok());
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static_assert(mwd0.month() == February);
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static_assert(mwd0.weekday_indexed() == Tuesday[3]);
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static_assert(!mwd{month{0}, Tuesday[3]}.ok());
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static_assert(!mwd{February, Tuesday[0]}.ok());
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static_assert(mwd{January, Monday[2]} == mwd{January, Monday[2]});
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static_assert(mwd{January, Monday[2]} != mwd{January, Monday[3]});
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static_assert(mwd{February, Monday[2]} != mwd{January, Monday[2]});
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static_assert(August/Friday[2] == mwd{month{8}, weekday_indexed{weekday{5u}, 2}});
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static_assert(8/Friday[2] == mwd{month{8}, weekday_indexed{weekday{5u}, 2}});
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static_assert(Friday[2]/August == mwd{month{8}, weekday_indexed{weekday{5u}, 2}});
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static_assert(Friday[2]/8 == mwd{month{8}, weekday_indexed{weekday{5u}, 2}});
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}
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