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124 lines
4.6 KiB
C++
124 lines
4.6 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
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// <chrono>
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// class year_month_day_last;
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// constexpr year_month_day_last
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// operator+(const year_month_day_last& ymdl, const months& dm) noexcept;
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//
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// Returns: (ymdl.year() / ymdl.month() + dm) / last.
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//
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// constexpr year_month_day_last
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// operator+(const months& dm, const year_month_day_last& ymdl) noexcept;
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//
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// Returns: ymdl + dm.
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//
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//
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// constexpr year_month_day_last
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// operator+(const year_month_day_last& ymdl, const years& dy) noexcept;
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//
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// Returns: {ymdl.year()+dy, ymdl.month_day_last()}.
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//
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// constexpr year_month_day_last
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// operator+(const years& dy, const year_month_day_last& ymdl) noexcept;
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//
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// Returns: ymdl + dy
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#include <chrono>
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#include <type_traits>
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#include <cassert>
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#include "test_macros.h"
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constexpr bool testConstexprYears(std::chrono::year_month_day_last ymdl)
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{
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std::chrono::years offset{23};
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if (static_cast<int>((ymdl ).year()) != 1) return false;
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if (static_cast<int>((ymdl + offset).year()) != 24) return false;
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if ( (ymdl + offset).month() != ymdl.month()) return false;
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if (static_cast<int>((offset + ymdl).year()) != 24) return false;
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if ( (offset + ymdl).month() != ymdl.month()) return false;
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return true;
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}
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constexpr bool testConstexprMonths(std::chrono::year_month_day_last ymdl)
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{
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std::chrono::months offset{6};
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if (static_cast<unsigned>((ymdl ).month()) != 1) return false;
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if ( (ymdl + offset).year() != ymdl.year()) return false;
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if (static_cast<unsigned>((ymdl + offset).month()) != 7) return false;
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if (static_cast<unsigned>((offset + ymdl).month()) != 7) return false;
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if ( (offset + ymdl).year() != ymdl.year()) return false;
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return true;
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}
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int main(int, char**)
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{
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using year = std::chrono::year;
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using month = std::chrono::month;
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using month_day_last = std::chrono::month_day_last;
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using year_month_day_last = std::chrono::year_month_day_last;
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using months = std::chrono::months;
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using years = std::chrono::years;
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constexpr month January = std::chrono::January;
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{ // year_month_day_last + months
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ASSERT_NOEXCEPT(std::declval<year_month_day_last>() + std::declval<months>());
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ASSERT_NOEXCEPT(std::declval<months>() + std::declval<year_month_day_last>());
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ASSERT_SAME_TYPE(year_month_day_last, decltype(std::declval<year_month_day_last>() + std::declval<months>()));
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ASSERT_SAME_TYPE(year_month_day_last, decltype(std::declval<months>() + std::declval<year_month_day_last>()));
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static_assert(testConstexprMonths(year_month_day_last{year{1}, month_day_last{January}}), "");
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year_month_day_last ym{year{1234}, month_day_last{January}};
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for (int i = 0; i <= 10; ++i) // TODO test wrap-around
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{
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year_month_day_last ym1 = ym + months{i};
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year_month_day_last ym2 = months{i} + ym;
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assert(static_cast<int>(ym1.year()) == 1234);
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assert(static_cast<int>(ym2.year()) == 1234);
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assert(ym1.month() == month(1 + i));
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assert(ym2.month() == month(1 + i));
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assert(ym1 == ym2);
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}
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}
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{ // year_month_day_last + years
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ASSERT_NOEXCEPT(std::declval<year_month_day_last>() + std::declval<years>());
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ASSERT_NOEXCEPT(std::declval<years>() + std::declval<year_month_day_last>());
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ASSERT_SAME_TYPE(year_month_day_last, decltype(std::declval<year_month_day_last>() + std::declval<years>()));
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ASSERT_SAME_TYPE(year_month_day_last, decltype(std::declval<years>() + std::declval<year_month_day_last>()));
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static_assert(testConstexprYears(year_month_day_last{year{1}, month_day_last{January}}), "");
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year_month_day_last ym{year{1234}, month_day_last{January}};
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for (int i = 0; i <= 10; ++i)
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{
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year_month_day_last ym1 = ym + years{i};
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year_month_day_last ym2 = years{i} + ym;
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assert(static_cast<int>(ym1.year()) == i + 1234);
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assert(static_cast<int>(ym2.year()) == i + 1234);
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assert(ym1.month() == std::chrono::January);
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assert(ym2.month() == std::chrono::January);
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assert(ym1 == ym2);
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}
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}
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return 0;
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}
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