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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 year_month& ym, const years& dy) noexcept;
// Returns: (ym.year() + dy) / ym.month().
//
// constexpr year_month operator+(const years& dy, const year_month& ym) noexcept;
// Returns: ym + dy.
//
// constexpr year_month operator+(const year_month& ym, const months& dm) noexcept;
// Returns: A year_month value z such that z.ok() && z - ym == dm is true.
// Complexity: O(1) with respect to the value of dm.
//
// constexpr year_month operator+(const months& dm, const year_month& ym) noexcept;
// Returns: ym + dm.
#include <chrono>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
using year = std::chrono::year;
using years = std::chrono::years;
using month = std::chrono::month;
using months = std::chrono::months;
using year_month = std::chrono::year_month;
// year_month + years
constexpr bool test_ym_plus_y() {
ASSERT_NOEXCEPT(std::declval<year_month>() + std::declval<years>());
ASSERT_NOEXCEPT(std::declval<years>() + std::declval<year_month>());
ASSERT_SAME_TYPE(
year_month, decltype(std::declval<year_month>() + std::declval<years>()));
ASSERT_SAME_TYPE(
year_month, decltype(std::declval<years>() + std::declval<year_month>()));
year_month ym{year{1234}, std::chrono::January};
for (int i = 0; i <= 10; ++i) {
year_month ym1 = ym + years{i};
year_month 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 == ym2);
}
return true;
}
// year_month + months
constexpr bool test_ym_plus_m() {
ASSERT_NOEXCEPT(std::declval<year_month>() + std::declval<months>());
ASSERT_NOEXCEPT(std::declval<months>() + std::declval<year_month>());
ASSERT_SAME_TYPE(year_month, decltype(std::declval<year_month>() +
std::declval<months>()));
ASSERT_SAME_TYPE(year_month, decltype(std::declval<months>() +
std::declval<year_month>()));
year_month ym{year{1234}, std::chrono::January};
for (int i = 0; i <= 11; ++i) {
year_month ym1 = ym + months{i};
year_month 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 == ym2);
}
for (int i = 12; i < 23; ++i) {
year_month ym1 = ym + months{i};
year_month ym2 = months{i} + ym;
assert(static_cast<int>(ym1.year()) == 1235);
assert(static_cast<int>(ym2.year()) == 1235);
assert(ym1.month() == month(1 + i % 12));
assert(ym2.month() == month(1 + i % 12));
assert(ym1 == ym2);
}
return true;
}
constexpr bool test() {
test_ym_plus_y();
test_ym_plus_m();
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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