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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_day;
// constexpr year_month_day operator-(const year_month_day& ymd, const years& dy) noexcept;
// Returns: ymd + (-dy)
#include <chrono>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
constexpr bool test_constexpr ()
{
std::chrono::year_month_day ym0{std::chrono::year{1234}, std::chrono::January, std::chrono::day{12}};
std::chrono::year_month_day ym1 = ym0 - std::chrono::years{10};
return
ym1.year() == std::chrono::year{1234-10}
&& ym1.month() == std::chrono::January
&& ym1.day() == std::chrono::day{12}
;
}
int main(int, char**)
{
using year = std::chrono::year;
using month = std::chrono::month;
using day = std::chrono::day;
using year_month_day = std::chrono::year_month_day;
using years = std::chrono::years;
ASSERT_NOEXCEPT( std::declval<year_month_day>() - std::declval<years>());
ASSERT_SAME_TYPE(year_month_day, decltype(std::declval<year_month_day>() - std::declval<years>()));
constexpr month January = std::chrono::January;
static_assert(test_constexpr(), "");
year_month_day ym{year{1234}, January, day{10}};
for (int i = 0; i <= 10; ++i)
{
year_month_day ym1 = ym - years{i};
assert(static_cast<int>(ym1.year()) == 1234 - i);
assert(ym1.month() == January);
assert(ym1.day() == day{10});
}
return 0;
}
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