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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <chrono>
// duration
// constexpr common_type_t<duration> operator-() const;
#include <chrono>
#include <cassert>
#include "test_macros.h"
int main()
{
{
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), "");
}
}
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