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47 lines
1.2 KiB
C++
47 lines
1.2 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
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// <chrono>
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// class day;
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// day() = default;
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// explicit constexpr day(unsigned d) noexcept;
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// explicit constexpr operator unsigned() const noexcept;
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// Effects: Constructs an object of type day by initializing d_ with d.
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// The value held is unspecified if d is not in the range [0, 255].
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#include <chrono>
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#include <type_traits>
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#include <cassert>
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#include "test_macros.h"
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int main()
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{
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using day = std::chrono::day;
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ASSERT_NOEXCEPT(day{});
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ASSERT_NOEXCEPT(day(0U));
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ASSERT_NOEXCEPT(static_cast<unsigned>(day(0U)));
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constexpr day d0{};
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static_assert(static_cast<unsigned>(d0) == 0, "");
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constexpr day d1{1};
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static_assert(static_cast<unsigned>(d1) == 1, "");
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for (unsigned i = 0; i <= 255; ++i)
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{
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day day(i);
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assert(static_cast<unsigned>(day) == i);
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}
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}
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