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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <chrono>
// time_point
// template <class Clock, class Duration1, class Rep2, class Period2>
// time_point<Clock, typename common_type<Duration1, duration<Rep2, Period2>>::type>
// operator-(const time_point<Clock, Duration1>& lhs, const duration<Rep2, Period2>& rhs);
#include <chrono>
#include <cassert>
#include <cstdint>
#include "test_macros.h"
template <class D>
void test2739() // LWG2739
{
typedef std::chrono::time_point<std::chrono::system_clock> TimePoint;
typedef std::chrono::duration<D> Dur;
const Dur d(5);
TimePoint t0 = std::chrono::system_clock::from_time_t(200);
TimePoint t1 = t0 - d;
assert(t1 < t0);
}
int main(int, char**)
{
typedef std::chrono::system_clock Clock;
typedef std::chrono::milliseconds Duration1;
typedef std::chrono::microseconds Duration2;
{
std::chrono::time_point<Clock, Duration1> t1(Duration1(3));
std::chrono::time_point<Clock, Duration2> t2 = t1 - Duration2(5);
assert(t2.time_since_epoch() == Duration2(2995));
}
#if TEST_STD_VER > 11
{
constexpr std::chrono::time_point<Clock, Duration1> t1(Duration1(3));
constexpr std::chrono::time_point<Clock, Duration2> t2 = t1 - Duration2(5);
static_assert(t2.time_since_epoch() == Duration2(2995), "");
}
#endif
test2739<std::int32_t>();
test2739<std::uint32_t>();
return 0;
}
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