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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // UNSUPPORTED: c++03, c++11, c++14, c++17 9 // <chrono> 10 11 // constexpr hours make24(const hours& h, bool is_pm) noexcept; 12 // Returns: If is_pm is false, returns the 24-hour equivalent of h in the range [0h, 11h], 13 // assuming h represents an ante meridiem hour. 14 // Else returns the 24-hour equivalent of h in the range [12h, 23h], 15 // assuming h represents a post meridiem hour. 16 // If h is not in the range [1h, 12h], the value returned is unspecified. 17 18 #include <chrono> 19 #include <cassert> 20 #include <utility> 21 22 #include "test_macros.h" 23 24 int main(int, char**) 25 { 26 using hours = std::chrono::hours; 27 ASSERT_SAME_TYPE(hours, decltype(std::chrono::make24(std::declval<hours>(), false))); 28 ASSERT_NOEXCEPT( std::chrono::make24(std::declval<hours>(), false)); 29 30 static_assert( std::chrono::make24(hours( 1), false) == hours( 1), ""); 31 static_assert( std::chrono::make24(hours(11), false) == hours(11), ""); 32 static_assert( std::chrono::make24(hours(12), false) == hours( 0), ""); 33 static_assert( std::chrono::make24(hours( 1), true) == hours(13), ""); 34 static_assert( std::chrono::make24(hours(11), true) == hours(23), ""); 35 static_assert( std::chrono::make24(hours(12), true) == hours(12), ""); 36 37 for (int i = 1; i < 11; ++i) 38 { 39 assert((std::chrono::make24(hours(i), false)) == hours(i)); 40 assert((std::chrono::make24(hours(i), true)) == hours(12+i)); 41 } 42 assert((std::chrono::make24(hours(12), false)) == hours( 0)); 43 assert((std::chrono::make24(hours(12), true)) == hours(12)); 44 45 return 0; 46 } 47