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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>
// duration
// constexpr common_type_t<duration> operator-() const;
#include <chrono>
#include <cassert>
#include "test_macros.h"
int main(int, char**)
{
{
const std::chrono::minutes m(3);
std::chrono::minutes m2 = -m;
assert(m2.count() == -m.count());
}
#if TEST_STD_VER >= 11
{
constexpr std::chrono::minutes m(3);
constexpr std::chrono::minutes m2 = -m;
static_assert(m2.count() == -m.count(), "");
}
#endif
// P0548
{
typedef std::chrono::duration<int, std::ratio<10,10> > D10;
typedef std::chrono::duration<int, std::ratio< 1, 1> > D1;
D10 zero(0);
D10 one(1);
static_assert( (std::is_same< decltype(-one), decltype(zero-one) >::value), "");
static_assert( (std::is_same< decltype(zero-one), D1>::value), "");
static_assert( (std::is_same< decltype(-one), D1>::value), "");
static_assert( (std::is_same< decltype(+one), D1>::value), "");
}
return 0;
}
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