55 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 9// UNSUPPORTED: c++03, c++11, c++1410 11// <chrono>12 13// ceil14 15// template <class ToDuration, class Rep, class Period>16// constexpr17// ToDuration18// ceil(const duration<Rep, Period>& d);19 20#include <chrono>21#include <type_traits>22#include <cassert>23 24#include "test_macros.h"25 26template <class ToDuration, class FromDuration>27void28test(const FromDuration& f, const ToDuration& d)29{30 {31 typedef decltype(std::chrono::ceil<ToDuration>(f)) R;32 static_assert((std::is_same<R, ToDuration>::value), "");33 assert(std::chrono::ceil<ToDuration>(f) == d);34 }35}36 37int main(int, char**)38{39// 7290000ms is 2 hours, 1 minute, and 30 seconds40 test(std::chrono::milliseconds( 7290000), std::chrono::hours( 3));41 test(std::chrono::milliseconds(-7290000), std::chrono::hours(-2));42 test(std::chrono::milliseconds( 7290000), std::chrono::minutes( 122));43 test(std::chrono::milliseconds(-7290000), std::chrono::minutes(-121));44 45 {46// 9000000ms is 2 hours and 30 minutes47 constexpr std::chrono::hours h1 = std::chrono::ceil<std::chrono::hours>(std::chrono::milliseconds(9000000));48 static_assert(h1.count() == 3, "");49 constexpr std::chrono::hours h2 = std::chrono::ceil<std::chrono::hours>(std::chrono::milliseconds(-9000000));50 static_assert(h2.count() == -2, "");51 }52 53 return 0;54}55