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72 lines
2.5 KiB
C++
72 lines
2.5 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 Clock, class Duration>
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// time_point<Clock, ToDuration>
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// round(const time_point<Clock, Duration>& t);
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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 FromDuration, class ToDuration>
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void
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test(const FromDuration& df, const ToDuration& d)
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{
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typedef std::chrono::system_clock Clock;
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typedef std::chrono::time_point<Clock, FromDuration> FromTimePoint;
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typedef std::chrono::time_point<Clock, ToDuration> ToTimePoint;
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{
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FromTimePoint f(df);
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ToTimePoint t(d);
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typedef decltype(std::chrono::round<ToDuration>(f)) R;
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static_assert((std::is_same<R, ToTimePoint>::value), "");
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assert(std::chrono::round<ToDuration>(f) == t);
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}
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}
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template<class FromDuration, long long From, class ToDuration, long long To>
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void test_constexpr ()
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{
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typedef std::chrono::system_clock Clock;
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typedef std::chrono::time_point<Clock, FromDuration> FromTimePoint;
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typedef std::chrono::time_point<Clock, ToDuration> ToTimePoint;
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{
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constexpr FromTimePoint f{FromDuration{From}};
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constexpr ToTimePoint t{ToDuration{To}};
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static_assert(std::chrono::round<ToDuration>(f) == t, "");
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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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// 9000000ms is 2 hours and 30 minutes
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test_constexpr<std::chrono::milliseconds, 9000000, std::chrono::hours, 2> ();
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test_constexpr<std::chrono::milliseconds,-9000000, std::chrono::hours, -2> ();
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test_constexpr<std::chrono::milliseconds, 9000001, std::chrono::minutes, 150> ();
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test_constexpr<std::chrono::milliseconds,-9000001, std::chrono::minutes,-150> ();
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test_constexpr<std::chrono::milliseconds, 9000000, std::chrono::seconds, 9000> ();
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test_constexpr<std::chrono::milliseconds,-9000000, std::chrono::seconds,-9000> ();
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return 0;
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}
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