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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.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
// <chrono>
// class year_month_day_last;
// constexpr year_month_day_last& operator+=(const years& d) noexcept;
// constexpr year_month_day_last& 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()
{
using year = std::chrono::year;
using month = std::chrono::month;
using month_day_last = std::chrono::month_day_last;
using year_month_day_last = std::chrono::year_month_day_last;
using years = std::chrono::years;
ASSERT_NOEXCEPT(std::declval<year_month_day_last&>() += std::declval<years>());
ASSERT_NOEXCEPT(std::declval<year_month_day_last&>() -= std::declval<years>());
ASSERT_SAME_TYPE(year_month_day_last&, decltype(std::declval<year_month_day_last&>() += std::declval<years>()));
ASSERT_SAME_TYPE(year_month_day_last&, decltype(std::declval<year_month_day_last&>() -= std::declval<years>()));
static_assert(testConstexpr<year_month_day_last, years>(year_month_day_last{year{1}, month_day_last{month{1}}}), "");
for (int i = 1000; i <= 1010; ++i)
{
month_day_last mdl{month{2}};
year_month_day_last ymdl(year{i}, mdl);
assert(static_cast<int>((ymdl += years{2}).year()) == i + 2);
assert(ymdl.month_day_last() == mdl);
assert(static_cast<int>((ymdl ).year()) == i + 2);
assert(ymdl.month_day_last() == mdl);
assert(static_cast<int>((ymdl -= years{1}).year()) == i + 1);
assert(ymdl.month_day_last() == mdl);
assert(static_cast<int>((ymdl ).year()) == i + 1);
assert(ymdl.month_day_last() == mdl);
}
}
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