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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_month;
// constexpr year_month& operator+=(const years& d) noexcept;
// constexpr year_month& operator-=(const years& d) noexcept;
#include <chrono>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
template <typename D, typename Ds>
constexpr bool testConstexpr(D d1)
{
if (static_cast<int>((d1 ).year()) != 1) return false;
if (static_cast<int>((d1 += Ds{ 1}).year()) != 2) return false;
if (static_cast<int>((d1 += Ds{ 2}).year()) != 4) return false;
if (static_cast<int>((d1 += Ds{12}).year()) != 16) return false;
if (static_cast<int>((d1 -= Ds{ 1}).year()) != 15) return false;
if (static_cast<int>((d1 -= Ds{ 2}).year()) != 13) return false;
if (static_cast<int>((d1 -= Ds{12}).year()) != 1) return false;
return true;
}
int main(int, char**)
{
using month = std::chrono::month;
using year = std::chrono::year;
using years = std::chrono::years;
using year_month = std::chrono::year_month;
ASSERT_NOEXCEPT( std::declval<year_month&>() += std::declval<years>());
ASSERT_SAME_TYPE(year_month&, decltype(std::declval<year_month&>() += std::declval<years>()));
ASSERT_NOEXCEPT( std::declval<year_month&>() -= std::declval<years>());
ASSERT_SAME_TYPE(year_month&, decltype(std::declval<year_month&>() -= std::declval<years>()));
static_assert(testConstexpr<year_month, years>(year_month{year{1}, month{1}}), "");
for (int i = 1000; i <= 1010; ++i)
{
month m{2};
year_month ym(year{i}, m);
assert(static_cast<int>((ym += years{2}).year()) == i + 2);
assert(ym.month() == m);
assert(static_cast<int>((ym ).year()) == i + 2);
assert(ym.month() == m);
assert(static_cast<int>((ym -= years{1}).year()) == i + 1);
assert(ym.month() == m);
assert(static_cast<int>((ym ).year()) == i + 1);
assert(ym.month() == m);
}
return 0;
}
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