//===----------------------------------------------------------------------===//
//
// 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++98, c++03, c++11, nvrtc

// <chrono>
// class year_month_day;

//  constexpr year_month_day(const sys_days& dp) noexcept;
//
//  Effects:  Constructs an object of type year_month_day that corresponds
//                to the date represented by dp.
//
//  Remarks: For any value ymd of type year_month_day for which ymd.ok() is true,
//                ymd == year_month_day{sys_days{ymd}} is true.
//
//  constexpr chrono::year   year() const noexcept;
//  constexpr chrono::month month() const noexcept;
//  constexpr bool             ok() const noexcept;

#include <cuda/std/chrono>
#include <cuda/std/type_traits>
#include <cassert>

#include "test_macros.h"

// MSVC warns about unsigned/signed comparisons and addition/subtraction
// Silence these warnings, but not the ones within the header itself.
#if defined(_MSC_VER)
# pragma warning( disable: 4307 )
# pragma warning( disable: 4308 )
#endif

int main(int, char**)
{
    using year           = cuda::std::chrono::year;
    using day            = cuda::std::chrono::day;
    using sys_days       = cuda::std::chrono::sys_days;
    using days           = cuda::std::chrono::days;
    using year_month_day = cuda::std::chrono::year_month_day;

    ASSERT_NOEXCEPT(year_month_day{cuda::std::declval<sys_days>()});

    auto constexpr January = cuda::std::chrono::January;

    {
    constexpr sys_days sd{};
    constexpr year_month_day ymd{sd};

    static_assert( ymd.ok(),                            "");
    static_assert( ymd.year()  == year{1970},           "");
    static_assert( ymd.month() == January, "");
    static_assert( ymd.day()   == day{1},               "");
    }

    {
    constexpr sys_days sd{days{10957+32}};
    constexpr year_month_day ymd{sd};

    auto constexpr February = cuda::std::chrono::February;

    static_assert( ymd.ok(),                             "");
    static_assert( ymd.year()  == year{2000},            "");
    static_assert( ymd.month() == February, "");
    static_assert( ymd.day()   == day{2},                "");
    }


//  There's one more leap day between 1/1/40 and 1/1/70
//  when compared to 1/1/70 -> 1/1/2000
    {
    constexpr sys_days sd{days{-10957}};
    constexpr year_month_day ymd{sd};

    static_assert( ymd.ok(),                            "");
    static_assert( ymd.year()  == year{1940},           "");
    static_assert( ymd.month() == January, "");
    static_assert( ymd.day()   == day{2},               "");
    }

    {
    sys_days sd{days{-(10957+34)}};
    year_month_day ymd{sd};
    auto constexpr November = cuda::std::chrono::November;

    assert( ymd.ok());
    assert( ymd.year()  == year{1939});
    assert( ymd.month() == November);
    assert( ymd.day()   == day{29});
    }

  return 0;
}
