llvm/libcxx/test/std/time/time.cal/time.cal.weekday/time.cal.weekday.members/ctor.pass.cpp

//===----------------------------------------------------------------------===//
//
// 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 weekday;

//                     weekday() = default;
//  explicit constexpr weekday(unsigned wd) noexcept;
//  constexpr weekday(const sys_days& dp) noexcept;
//  explicit constexpr weekday(const local_days& dp) noexcept;
//
//  unsigned c_encoding() const noexcept;

//  Effects: Constructs an object of type weekday by initializing wd_ with wd == 7 ? 0 : wd
//    The value held is unspecified if wd is not in the range [0, 255].

#include <chrono>
#include <type_traits>
#include <cassert>

#include "test_macros.h"

int main(int, char**)
{
    using weekday = std::chrono::weekday;

    ASSERT_NOEXCEPT(weekday{});
    ASSERT_NOEXCEPT(weekday(1));
    ASSERT_NOEXCEPT(weekday(1).c_encoding());

    constexpr weekday m0{};
    static_assert(m0.c_encoding() == 0, "");

    constexpr weekday m1{1};
    static_assert(m1.c_encoding() == 1, "");

    for (unsigned i = 0; i <= 255; ++i)
    {
        weekday m(i);
        assert(m.c_encoding() == (i == 7 ? 0 : i));
    }

    // TODO - sys_days and local_days ctor tests

    return 0;
}