| //===----------------------------------------------------------------------===// |
| // |
| // 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 operator sys_days() const noexcept; |
| // Returns: If ok() == true, returns a sys_days that represents the last weekday() |
| // of year()/month(). Otherwise the returned value is unspecified. |
| |
| #include <chrono> |
| #include <type_traits> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| |
| int main(int, char**) |
| { |
| using year = std::chrono::year; |
| using month = std::chrono::month; |
| using year_month_weekday_last = std::chrono::year_month_weekday_last; |
| using sys_days = std::chrono::sys_days; |
| using days = std::chrono::days; |
| using weekday = std::chrono::weekday; |
| using weekday_last = std::chrono::weekday_last; |
| |
| ASSERT_NOEXCEPT( static_cast<sys_days>(std::declval<const year_month_weekday_last>())); |
| ASSERT_SAME_TYPE(sys_days, decltype(static_cast<sys_days>(std::declval<const year_month_weekday_last>()))); |
| |
| constexpr month January = std::chrono::January; |
| constexpr weekday Tuesday = std::chrono::Tuesday; |
| |
| { // Last Tuesday in Jan 1970 was the 27th |
| constexpr year_month_weekday_last ymwdl{year{1970}, January, weekday_last{Tuesday}}; |
| constexpr sys_days sd{ymwdl}; |
| |
| static_assert(sd.time_since_epoch() == days{26}, ""); |
| } |
| |
| { // Last Tuesday in Jan 2000 was the 25th |
| constexpr year_month_weekday_last ymwdl{year{2000}, January, weekday_last{Tuesday}}; |
| constexpr sys_days sd{ymwdl}; |
| |
| static_assert(sd.time_since_epoch() == days{10957+24}, ""); |
| } |
| |
| { // Last Tuesday in Jan 1940 was the 30th |
| constexpr year_month_weekday_last ymwdl{year{1940}, January, weekday_last{Tuesday}}; |
| constexpr sys_days sd{ymwdl}; |
| |
| static_assert(sd.time_since_epoch() == days{-10958+29}, ""); |
| } |
| |
| { // Last Tuesday in Nov 1939 was the 28th |
| year_month_weekday_last ymdl{year{1939}, std::chrono::November, weekday_last{Tuesday}}; |
| sys_days sd{ymdl}; |
| |
| assert(sd.time_since_epoch() == days{-(10957+35)}); |
| } |
| |
| return 0; |
| } |