40 lines
1.4 KiB
C++
40 lines
1.4 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 make12(const hours& h) noexcept;
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// Returns: The 12-hour equivalent of h in the range [1h, 12h].
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// If h is not in the range [0h, 23h], 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::make12(std::declval<hours>())));
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ASSERT_NOEXCEPT( std::chrono::make12(std::declval<hours>()));
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static_assert( std::chrono::make12(hours( 0)) == hours(12), "");
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static_assert( std::chrono::make12(hours(11)) == hours(11), "");
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static_assert( std::chrono::make12(hours(12)) == hours(12), "");
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static_assert( std::chrono::make12(hours(23)) == hours(11), "");
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assert( std::chrono::make12(hours(0)) == hours(12));
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for (int i = 1; i < 13; ++i)
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assert( std::chrono::make12(hours(i)) == hours(i));
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for (int i = 13; i < 24; ++i)
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assert( std::chrono::make12(hours(i)) == hours(i-12));
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return 0;
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}
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