| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17 |
| |
| // <chrono> |
| // class year_month_day_last; |
| |
| // constexpr year_month_day_last& operator+=(const months& m) noexcept; |
| // constexpr year_month_day_last& operator-=(const months& m) noexcept; |
| |
| #include <chrono> |
| #include <type_traits> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| template <typename D, typename Ds> |
| constexpr bool testConstexpr(D d1) |
| { |
| if (static_cast<unsigned>((d1 ).month()) != 1) return false; |
| if (static_cast<unsigned>((d1 += Ds{ 1}).month()) != 2) return false; |
| if (static_cast<unsigned>((d1 += Ds{ 2}).month()) != 4) return false; |
| if (static_cast<unsigned>((d1 += Ds{12}).month()) != 4) return false; |
| if (static_cast<unsigned>((d1 -= Ds{ 1}).month()) != 3) return false; |
| if (static_cast<unsigned>((d1 -= Ds{ 2}).month()) != 1) return false; |
| if (static_cast<unsigned>((d1 -= Ds{12}).month()) != 1) return false; |
| return true; |
| } |
| |
| int main(int, char**) |
| { |
| using year = std::chrono::year; |
| using month = std::chrono::month; |
| using month_day_last = std::chrono::month_day_last; |
| using year_month_day_last = std::chrono::year_month_day_last; |
| using months = std::chrono::months; |
| |
| ASSERT_NOEXCEPT(std::declval<year_month_day_last&>() += std::declval<months>()); |
| ASSERT_NOEXCEPT(std::declval<year_month_day_last&>() -= std::declval<months>()); |
| |
| ASSERT_SAME_TYPE(year_month_day_last&, decltype(std::declval<year_month_day_last&>() += std::declval<months>())); |
| ASSERT_SAME_TYPE(year_month_day_last&, decltype(std::declval<year_month_day_last&>() -= std::declval<months>())); |
| |
| static_assert(testConstexpr<year_month_day_last, months>(year_month_day_last{year{1234}, month_day_last{month{1}}}), ""); |
| |
| for (unsigned i = 0; i <= 10; ++i) |
| { |
| year y{1234}; |
| month_day_last mdl{month{i}}; |
| year_month_day_last ym(y, mdl); |
| assert(static_cast<unsigned>((ym += months{2}).month()) == i + 2); |
| assert(ym.year() == y); |
| assert(static_cast<unsigned>((ym ).month()) == i + 2); |
| assert(ym.year() == y); |
| assert(static_cast<unsigned>((ym -= months{1}).month()) == i + 1); |
| assert(ym.year() == y); |
| assert(static_cast<unsigned>((ym ).month()) == i + 1); |
| assert(ym.year() == y); |
| } |
| |
| return 0; |
| } |