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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 months& dm) noexcept;
// Returns: (ymd.year() / ymd.month() + dm) / ymd.day().
//
// constexpr year_month_day operator+(const months& dm, const year_month_day& ymd) noexcept;
// Returns: ymd + dm.
//
//
// constexpr year_month_day operator+(const year_month_day& ymd, const years& dy) noexcept;
// Returns: (ymd.year() + dy) / ymd.month() / ymd.day().
//
// constexpr year_month_day operator+(const years& dy, const year_month_day& ymd) noexcept;
// Returns: ym + dm.
#include <chrono>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
constexpr bool testConstexprYears(std::chrono::year_month_day ym)
{
std::chrono::years offset{23};
if (static_cast<int>((ym ).year()) != 1) return false;
if (static_cast<int>((ym + offset).year()) != 24) return false;
if (static_cast<int>((offset + ym).year()) != 24) return false;
return true;
}
constexpr bool testConstexprMonths(std::chrono::year_month_day ym)
{
std::chrono::months offset{6};
if (static_cast<unsigned>((ym ).month()) != 1) return false;
if (static_cast<unsigned>((ym + offset).month()) != 7) return false;
if (static_cast<unsigned>((offset + ym).month()) != 7) return false;
return true;
}
int main(int, char**)
{
using day = std::chrono::day;
using year = std::chrono::year;
using years = std::chrono::years;
using month = std::chrono::month;
using months = std::chrono::months;
using year_month_day = std::chrono::year_month_day;
{ // year_month_day + months
ASSERT_NOEXCEPT(std::declval<year_month_day>() + std::declval<months>());
ASSERT_NOEXCEPT(std::declval<months>() + std::declval<year_month_day>());
ASSERT_SAME_TYPE(year_month_day, decltype(std::declval<year_month_day>() + std::declval<months>()));
ASSERT_SAME_TYPE(year_month_day, decltype(std::declval<months>() + std::declval<year_month_day>()));
static_assert(testConstexprMonths(year_month_day{year{1}, month{1}, day{1}}), "");
year_month_day ym{year{1234}, std::chrono::January, day{12}};
for (int i = 0; i <= 10; ++i) // TODO test wrap-around
{
year_month_day ym1 = ym + months{i};
year_month_day ym2 = months{i} + ym;
assert(static_cast<int>(ym1.year()) == 1234);
assert(static_cast<int>(ym2.year()) == 1234);
assert(ym1.month() == month(1 + i));
assert(ym2.month() == month(1 + i));
assert(ym1.day() == day{12});
assert(ym2.day() == day{12});
assert(ym1 == ym2);
}
}
{ // year_month_day + years
ASSERT_NOEXCEPT(std::declval<year_month_day>() + std::declval<years>());
ASSERT_NOEXCEPT(std::declval<years>() + std::declval<year_month_day>());
ASSERT_SAME_TYPE(year_month_day, decltype(std::declval<year_month_day>() + std::declval<years>()));
ASSERT_SAME_TYPE(year_month_day, decltype(std::declval<years>() + std::declval<year_month_day>()));
static_assert(testConstexprYears (year_month_day{year{1}, month{1}, day{1}}), "");
year_month_day ym{year{1234}, std::chrono::January, day{12}};
for (int i = 0; i <= 10; ++i)
{
year_month_day ym1 = ym + years{i};
year_month_day ym2 = years{i} + ym;
assert(static_cast<int>(ym1.year()) == i + 1234);
assert(static_cast<int>(ym2.year()) == i + 1234);
assert(ym1.month() == std::chrono::January);
assert(ym2.month() == std::chrono::January);
assert(ym1.day() == day{12});
assert(ym2.day() == day{12});
assert(ym1 == ym2);
}
}
return 0;
}
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