47 lines
1.9 KiB
C++
47 lines
1.9 KiB
C++
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// <chrono>
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// constexpr hours make24(const hours& h, bool is_pm) noexcept;
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// Returns: If is_pm is false, returns the 24-hour equivalent of h in the range [0h, 11h],
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// assuming h represents an ante meridiem hour.
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// Else returns the 24-hour equivalent of h in the range [12h, 23h],
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// assuming h represents a post meridiem hour.
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// If h is not in the range [1h, 12h], the value returned is unspecified.
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#include <chrono>
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#include <cassert>
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#include <utility>
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#include "test_macros.h"
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int main(int, char**)
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{
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using hours = std::chrono::hours;
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ASSERT_SAME_TYPE(hours, decltype(std::chrono::make24(std::declval<hours>(), false)));
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ASSERT_NOEXCEPT( std::chrono::make24(std::declval<hours>(), false));
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static_assert( std::chrono::make24(hours( 1), false) == hours( 1), "");
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static_assert( std::chrono::make24(hours(11), false) == hours(11), "");
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static_assert( std::chrono::make24(hours(12), false) == hours( 0), "");
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static_assert( std::chrono::make24(hours( 1), true) == hours(13), "");
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static_assert( std::chrono::make24(hours(11), true) == hours(23), "");
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static_assert( std::chrono::make24(hours(12), true) == hours(12), "");
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for (int i = 1; i < 11; ++i)
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{
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assert((std::chrono::make24(hours(i), false)) == hours(i));
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assert((std::chrono::make24(hours(i), true)) == hours(12+i));
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}
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assert((std::chrono::make24(hours(12), false)) == hours( 0));
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assert((std::chrono::make24(hours(12), true)) == hours(12));
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return 0;
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}
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