| //===----------------------------------------------------------------------===// |
| // |
| // 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_weekday_last; |
| |
| // constexpr year_month_weekday_last operator-(const year_month_weekday_last& ymwdl, const months& dm) noexcept; |
| // Returns: ymwdl + (-dm). |
| // |
| // constexpr year_month_weekday_last operator-(const year_month_weekday_last& ymwdl, const years& dy) noexcept; |
| // Returns: ymwdl + (-dy). |
| |
| #include <chrono> |
| #include <type_traits> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| |
| constexpr bool testConstexprYears(std::chrono::year_month_weekday_last ym) |
| { |
| std::chrono::years offset{14}; |
| if (static_cast<int>((ym ).year()) != 66) return false; |
| if (static_cast<int>((ym - offset).year()) != 52) return false; |
| return true; |
| } |
| |
| constexpr bool testConstexprMonths(std::chrono::year_month_weekday_last ym) |
| { |
| std::chrono::months offset{6}; |
| if (static_cast<unsigned>((ym ).month()) != 10) return false; |
| if (static_cast<unsigned>((ym - offset).month()) != 4) return false; |
| return true; |
| } |
| |
| int main(int, char**) |
| { |
| using year = std::chrono::year; |
| using month = std::chrono::month; |
| using weekday = std::chrono::weekday; |
| using weekday_last = std::chrono::weekday_last; |
| using year_month_weekday_last = std::chrono::year_month_weekday_last; |
| using years = std::chrono::years; |
| using months = std::chrono::months; |
| |
| constexpr month October = std::chrono::October; |
| constexpr weekday Tuesday = std::chrono::Tuesday; |
| |
| { // year_month_weekday_last - years |
| |
| ASSERT_NOEXCEPT( std::declval<year_month_weekday_last>() - std::declval<years>()); |
| ASSERT_SAME_TYPE(year_month_weekday_last, decltype(std::declval<year_month_weekday_last>() - std::declval<years>())); |
| |
| static_assert(testConstexprYears(year_month_weekday_last{year{66}, October, weekday_last{Tuesday}}), ""); |
| |
| year_month_weekday_last ym{year{1234}, October, weekday_last{Tuesday}}; |
| for (int i = 0; i <= 10; ++i) |
| { |
| year_month_weekday_last ym1 = ym - years{i}; |
| assert(ym1.year() == year{1234 - i}); |
| assert(ym1.month() == October); |
| assert(ym1.weekday() == Tuesday); |
| assert(ym1.weekday_last() == weekday_last{Tuesday}); |
| } |
| } |
| |
| { // year_month_weekday_last - months |
| |
| ASSERT_NOEXCEPT( std::declval<year_month_weekday_last>() - std::declval<months>()); |
| ASSERT_SAME_TYPE(year_month_weekday_last, decltype(std::declval<year_month_weekday_last>() - std::declval<months>())); |
| |
| static_assert(testConstexprMonths(year_month_weekday_last{year{66}, October, weekday_last{Tuesday}}), ""); |
| |
| year_month_weekday_last ym{year{1234}, October, weekday_last{Tuesday}}; |
| for (unsigned i = 0; i < 10; ++i) |
| { |
| year_month_weekday_last ym1 = ym - months{i}; |
| assert(ym1.year() == year{1234}); |
| assert(ym1.month() == month{10 - i}); |
| assert(ym1.weekday() == Tuesday); |
| assert(ym1.weekday_last() == weekday_last{Tuesday}); |
| } |
| } |
| |
| |
| return 0; |
| } |