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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++98, c++03, c++11, c++14, c++17
// <chrono>
// class year;
// constexpr year& operator--() noexcept;
// constexpr year operator--(int) noexcept;
#include <chrono>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
template <typename Y>
constexpr bool testConstexpr()
{
Y y1{10};
if (static_cast<int>(--y1) != 9) return false;
if (static_cast<int>(y1--) != 9) return false;
if (static_cast<int>(y1) != 8) return false;
return true;
}
int main()
{
using year = std::chrono::year;
ASSERT_NOEXCEPT(--(std::declval<year&>()) );
ASSERT_NOEXCEPT( (std::declval<year&>())--);
ASSERT_SAME_TYPE(year , decltype( std::declval<year&>()--));
ASSERT_SAME_TYPE(year&, decltype(--std::declval<year&>() ));
static_assert(testConstexpr<year>(), "");
for (int i = 11000; i <= 11020; ++i)
{
year year(i);
assert(static_cast<int>(--year) == i - 1);
assert(static_cast<int>(year--) == i - 1);
assert(static_cast<int>(year) == i - 2);
}
}
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