98 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8// UNSUPPORTED: c++03, c++11, c++14, c++179 10// <chrono>11// class year_month_weekday;12 13// explicit constexpr year_month_weekday(const local_days& dp) noexcept;14//15//16// Effects: Constructs an object of type year_month_weekday that corresponds17// to the date represented by dp18//19// Remarks: Equivalent to constructing with sys_days{dp.time_since_epoch()}.20//21// constexpr chrono::year year() const noexcept;22// constexpr chrono::month month() const noexcept;23// constexpr chrono::day day() const noexcept;24// constexpr bool ok() const noexcept;25 26#include <chrono>27#include <cassert>28#include <type_traits>29#include <utility>30 31#include "test_macros.h"32 33int main(int, char**)34{35 using year = std::chrono::year;36 using days = std::chrono::days;37 using local_days = std::chrono::local_days;38 using weekday_indexed = std::chrono::weekday_indexed;39 using year_month_weekday = std::chrono::year_month_weekday;40 41 ASSERT_NOEXCEPT(year_month_weekday{std::declval<const local_days>()});42 43 {44 constexpr local_days sd{}; // 1-Jan-1970 was a Thursday45 constexpr year_month_weekday ymwd{sd};46 47 static_assert( ymwd.ok(), "");48 static_assert( ymwd.year() == year{1970}, "");49 static_assert( ymwd.month() == std::chrono::January, "");50 static_assert( ymwd.weekday() == std::chrono::Thursday, "");51 static_assert( ymwd.index() == 1, "");52 static_assert( ymwd.weekday_indexed() == weekday_indexed{std::chrono::Thursday, 1}, "");53 static_assert( ymwd == year_month_weekday{local_days{ymwd}}, ""); // round trip54 }55 56 {57 constexpr local_days sd{days{10957+32}}; // 2-Feb-2000 was a Wednesday58 constexpr year_month_weekday ymwd{sd};59 60 static_assert( ymwd.ok(), "");61 static_assert( ymwd.year() == year{2000}, "");62 static_assert( ymwd.month() == std::chrono::February, "");63 static_assert( ymwd.weekday() == std::chrono::Wednesday, "");64 static_assert( ymwd.index() == 1, "");65 static_assert( ymwd.weekday_indexed() == weekday_indexed{std::chrono::Wednesday, 1}, "");66 static_assert( ymwd == year_month_weekday{local_days{ymwd}}, ""); // round trip67 }68 69 70 {71 constexpr local_days sd{days{-10957}}; // 2-Jan-1940 was a Tuesday72 constexpr year_month_weekday ymwd{sd};73 74 static_assert( ymwd.ok(), "");75 static_assert( ymwd.year() == year{1940}, "");76 static_assert( ymwd.month() == std::chrono::January, "");77 static_assert( ymwd.weekday() == std::chrono::Tuesday, "");78 static_assert( ymwd.index() == 1, "");79 static_assert( ymwd.weekday_indexed() == weekday_indexed{std::chrono::Tuesday, 1}, "");80 static_assert( ymwd == year_month_weekday{local_days{ymwd}}, ""); // round trip81 }82 83 {84 local_days sd{days{-(10957+34)}}; // 29-Nov-1939 was a Wednesday85 year_month_weekday ymwd{sd};86 87 assert( ymwd.ok());88 assert( ymwd.year() == year{1939});89 assert( ymwd.month() == std::chrono::November);90 assert( ymwd.weekday() == std::chrono::Wednesday);91 assert( ymwd.index() == 5);92 assert((ymwd.weekday_indexed() == weekday_indexed{std::chrono::Wednesday, 5}));93 assert( ymwd == year_month_weekday{local_days{ymwd}}); // round trip94 }95 96 return 0;97}98