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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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// <chrono>
// class year;
// constexpr year& operator+=(const years& d) noexcept;
// constexpr year& operator-=(const years& d) noexcept;
#include <chrono>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
template <typename Y, typename Ys>
constexpr bool testConstexpr()
{
Y y1{1};
if (static_cast<int>(y1 += Ys{ 1}) != 2) return false;
if (static_cast<int>(y1 += Ys{ 2}) != 4) return false;
if (static_cast<int>(y1 += Ys{ 8}) != 12) return false;
if (static_cast<int>(y1 -= Ys{ 1}) != 11) return false;
if (static_cast<int>(y1 -= Ys{ 2}) != 9) return false;
if (static_cast<int>(y1 -= Ys{ 8}) != 1) return false;
return true;
}
int main(int, char**)
{
using year = std::chrono::year;
using years = std::chrono::years;
ASSERT_NOEXCEPT(std::declval<year&>() += std::declval<years>());
ASSERT_NOEXCEPT(std::declval<year&>() -= std::declval<years>());
ASSERT_SAME_TYPE(year&, decltype(std::declval<year&>() += std::declval<years>()));
ASSERT_SAME_TYPE(year&, decltype(std::declval<year&>() -= std::declval<years>()));
static_assert(testConstexpr<year, years>(), "");
for (int i = 10000; i <= 10020; ++i)
{
year yr(i);
assert(static_cast<int>(yr += years{10}) == i + 10);
assert(static_cast<int>(yr) == i + 10);
assert(static_cast<int>(yr -= years{ 9}) == i + 1);
assert(static_cast<int>(yr) == i + 1);
}
return 0;
}
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