//===----------------------------------------------------------------------===//
//
// 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_weekday_last;
// constexpr year_month_weekday_last operator-(const year_month_weekday_last& ymwdl, const months& dm) noexcept;
// Returns: ymwdl + (-dm).
//
// constexpr year_month_weekday_last operator-(const year_month_weekday_last& ymwdl, const years& dy) noexcept;
// Returns: ymwdl + (-dy).
#include <chrono>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
using year = std::chrono::year;
using month = std::chrono::month;
using weekday = std::chrono::weekday;
using weekday_last = std::chrono::weekday_last;
using year_month_weekday_last = std::chrono::year_month_weekday_last;
using years = std::chrono::years;
using months = std::chrono::months;
constexpr bool test() {
constexpr month October = std::chrono::October;
constexpr weekday Tuesday = std::chrono::Tuesday;
{ // year_month_weekday_last - years
year_month_weekday_last ymwdl{year{1234}, October, weekday_last{Tuesday}};
for (int i = 0; i <= 10; ++i) {
year_month_weekday_last ymwdl1 = ymwdl - years{i};
assert(ymwdl1.year() == year{1234 - i});
assert(ymwdl1.month() == October);
assert(ymwdl1.weekday() == Tuesday);
assert(ymwdl1.weekday_last() == weekday_last{Tuesday});
}
}
{ // year_month_weekday_last - months
year_month_weekday_last ymwdl{year{1234}, October, weekday_last{Tuesday}};
for (unsigned i = 0; i < 10; ++i) {
year_month_weekday_last ymwdl1 = ymwdl - months{i};
assert(ymwdl1.year() == year{1234});
assert(ymwdl1.month() == month{10 - i});
assert(ymwdl1.weekday() == Tuesday);
assert(ymwdl1.weekday_last() == weekday_last{Tuesday});
}
// Test the year wraps around.
for (unsigned i = 12; i < 15; ++i) {
year_month_weekday_last ymwdl1 = ymwdl - months{i};
assert(ymwdl1.year() == year{1233});
assert(ymwdl1.month() == month{10 - i + 12});
assert(ymwdl1.weekday() == Tuesday);
assert(ymwdl1.weekday_last() == weekday_last{Tuesday});
}
}
return true;
}
int main(int, char**) {
// year_month_weekday_last - years
ASSERT_NOEXCEPT(std::declval<year_month_weekday_last>() - std::declval<years>());
ASSERT_SAME_TYPE(year_month_weekday_last, decltype(std::declval<year_month_weekday_last>() - std::declval<years>()));
// year_month_weekday_last - months
ASSERT_NOEXCEPT(std::declval<year_month_weekday_last>() - std::declval<months>());
ASSERT_SAME_TYPE(year_month_weekday_last, decltype(std::declval<year_month_weekday_last>() - std::declval<months>()));
test();
static_assert(test());
return 0;
}