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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 month_weekday;
// constexpr month_weekday
// operator/(const month& m, const weekday_indexed& wdi) noexcept;
// Returns: {m, wdi}.
//
// constexpr month_weekday
// operator/(int m, const weekday_indexed& wdi) noexcept;
// Returns: month(m) / wdi.
//
// constexpr month_weekday
// operator/(const weekday_indexed& wdi, const month& m) noexcept;
// Returns: m / wdi. constexpr month_weekday
//
// constexpr month_weekday
// operator/(const weekday_indexed& wdi, int m) noexcept;
// Returns: month(m) / wdi.
//
// [Example:
// constexpr auto mwd = February/Tuesday[3]; // mwd is the third Tuesday of February of an as yet unspecified year
// static_assert(mwd.month() == February);
// static_assert(mwd.weekday_indexed() == Tuesday[3]);
// —end example]
#include <chrono>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
#include "test_comparisons.h"
int main(int, char**)
{
using month_weekday = std::chrono::month_weekday;
using month = std::chrono::month;
using weekday = std::chrono::weekday;
using weekday_indexed = std::chrono::weekday_indexed;
constexpr weekday Tuesday = std::chrono::Tuesday;
constexpr month February = std::chrono::February;
{ // operator/(const month& m, const weekday_indexed& wdi) (and switched)
ASSERT_NOEXCEPT (February/Tuesday[2]);
ASSERT_SAME_TYPE(month_weekday, decltype(February/Tuesday[2]));
ASSERT_NOEXCEPT (Tuesday[2]/February);
ASSERT_SAME_TYPE(month_weekday, decltype(Tuesday[2]/February));
// Run the example
{
constexpr month_weekday wdi = February/Tuesday[3];
static_assert(wdi.month() == February, "");
static_assert(wdi.weekday_indexed() == Tuesday[3], "");
}
for (int i = 1; i <= 12; ++i)
for (unsigned j = 0; j <= 6; ++j)
for (unsigned k = 1; k <= 5; ++k)
{
month m(i);
weekday_indexed wdi = weekday{j}[k];
month_weekday mwd1 = m/wdi;
month_weekday mwd2 = wdi/m;
assert(mwd1.month() == m);
assert(mwd1.weekday_indexed() == wdi);
assert(mwd2.month() == m);
assert(mwd2.weekday_indexed() == wdi);
assert(mwd1 == mwd2);
}
}
{ // operator/(int m, const weekday_indexed& wdi) (and switched)
ASSERT_NOEXCEPT (2/Tuesday[2]);
ASSERT_SAME_TYPE(month_weekday, decltype(2/Tuesday[2]));
ASSERT_NOEXCEPT (Tuesday[2]/2);
ASSERT_SAME_TYPE(month_weekday, decltype(Tuesday[2]/2));
// Run the example
{
constexpr month_weekday wdi = 2/Tuesday[3];
static_assert(wdi.month() == February, "");
static_assert(wdi.weekday_indexed() == Tuesday[3], "");
}
for (int i = 1; i <= 12; ++i)
for (unsigned j = 0; j <= 6; ++j)
for (unsigned k = 1; k <= 5; ++k)
{
weekday_indexed wdi = weekday{j}[k];
month_weekday mwd1 = i/wdi;
month_weekday mwd2 = wdi/i;
assert(mwd1.month() == month(i));
assert(mwd1.weekday_indexed() == wdi);
assert(mwd2.month() == month(i));
assert(mwd2.weekday_indexed() == wdi);
assert(mwd1 == mwd2);
}
}
return 0;
}
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