54 lines
1.7 KiB
C++
54 lines
1.7 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03, c++11, c++14
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// <chrono>
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// round
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// template <class ToDuration, class Rep, class Period>
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// constexpr
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// ToDuration
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// ceil(const duration<Rep, Period>& d);
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#include <chrono>
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#include <type_traits>
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#include <cassert>
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#include "test_macros.h"
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template <class ToDuration, class FromDuration>
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void
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test(const FromDuration& f, const ToDuration& d)
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{
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{
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typedef decltype(std::chrono::round<ToDuration>(f)) R;
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static_assert((std::is_same<R, ToDuration>::value), "");
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assert(std::chrono::round<ToDuration>(f) == d);
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}
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}
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int main(int, char**)
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{
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// 7290000ms is 2 hours, 1 minute, and 30 seconds
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test(std::chrono::milliseconds( 7290000), std::chrono::hours( 2));
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test(std::chrono::milliseconds(-7290000), std::chrono::hours(-2));
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test(std::chrono::milliseconds( 7290000), std::chrono::minutes( 122));
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test(std::chrono::milliseconds(-7290000), std::chrono::minutes(-122));
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{
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// 9000000ms is 2 hours and 30 minutes
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constexpr std::chrono::hours h1 = std::chrono::round<std::chrono::hours>(std::chrono::milliseconds(9000000));
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static_assert(h1.count() == 2, "");
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constexpr std::chrono::hours h2 = std::chrono::round<std::chrono::hours>(std::chrono::milliseconds(-9000000));
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static_assert(h2.count() == -2, "");
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}
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return 0;
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}
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