40 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// <chrono>10 11// constexpr hours make12(const hours& h) noexcept;12// Returns: The 12-hour equivalent of h in the range [1h, 12h].13// If h is not in the range [0h, 23h], the value returned is unspecified.14 15#include <chrono>16#include <cassert>17#include <utility>18 19#include "test_macros.h"20 21int main(int, char**)22{23 using hours = std::chrono::hours;24 ASSERT_SAME_TYPE(hours, decltype(std::chrono::make12(std::declval<hours>())));25 ASSERT_NOEXCEPT( std::chrono::make12(std::declval<hours>()));26 27 static_assert( std::chrono::make12(hours( 0)) == hours(12), "");28 static_assert( std::chrono::make12(hours(11)) == hours(11), "");29 static_assert( std::chrono::make12(hours(12)) == hours(12), "");30 static_assert( std::chrono::make12(hours(23)) == hours(11), "");31 32 assert( std::chrono::make12(hours(0)) == hours(12));33 for (int i = 1; i < 13; ++i)34 assert( std::chrono::make12(hours(i)) == hours(i));35 for (int i = 13; i < 24; ++i)36 assert( std::chrono::make12(hours(i)) == hours(i-12));37 38 return 0;39}40