54 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// <chrono>11 12// round13 14// template <class ToDuration, class Rep, class Period>15// constexpr16// ToDuration17// ceil(const duration<Rep, Period>& d);18 19#include <chrono>20#include <type_traits>21#include <cassert>22 23#include "test_macros.h"24 25template <class ToDuration, class FromDuration>26void27test(const FromDuration& f, const ToDuration& d)28{29 {30 typedef decltype(std::chrono::round<ToDuration>(f)) R;31 static_assert((std::is_same<R, ToDuration>::value), "");32 assert(std::chrono::round<ToDuration>(f) == d);33 }34}35 36int main(int, char**)37{38// 7290000ms is 2 hours, 1 minute, and 30 seconds39 test(std::chrono::milliseconds( 7290000), std::chrono::hours( 2));40 test(std::chrono::milliseconds(-7290000), std::chrono::hours(-2));41 test(std::chrono::milliseconds( 7290000), std::chrono::minutes( 122));42 test(std::chrono::milliseconds(-7290000), std::chrono::minutes(-122));43 44 {45// 9000000ms is 2 hours and 30 minutes46 constexpr std::chrono::hours h1 = std::chrono::round<std::chrono::hours>(std::chrono::milliseconds(9000000));47 static_assert(h1.count() == 2, "");48 constexpr std::chrono::hours h2 = std::chrono::round<std::chrono::hours>(std::chrono::milliseconds(-9000000));49 static_assert(h2.count() == -2, "");50 }51 52 return 0;53}54