53 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;12 13// constexpr bool ok() const noexcept;14// Returns: m_.ok() && y_.ok().15 16#include <chrono>17#include <cassert>18#include <type_traits>19#include <utility>20 21#include "test_macros.h"22 23int main(int, char**)24{25 using month = std::chrono::month;26 using year = std::chrono::year;27 using year_month = std::chrono::year_month;28 29 constexpr month January = std::chrono::January;30 31 ASSERT_NOEXCEPT( std::declval<const year_month>().ok());32 ASSERT_SAME_TYPE(bool, decltype(std::declval<const year_month>().ok()));33 34 static_assert(!year_month{year{-32768}, January}.ok(), ""); // Bad year35 static_assert(!year_month{year{2019}, month{}}.ok(), ""); // Bad month36 static_assert( year_month{year{2019}, January}.ok(), ""); // Both OK37 38 for (unsigned i = 0; i <= 50; ++i)39 {40 year_month ym{year{2019}, month{i}};41 assert( ym.ok() == month{i}.ok());42 }43 44 const int ymax = static_cast<int>(year::max());45 for (int i = ymax - 100; i <= ymax + 100; ++i)46 {47 year_month ym{year{i}, January};48 assert( ym.ok() == year{i}.ok());49 }50 51 return 0;52}53