forked from OSchip/llvm-project
51 lines
1.5 KiB
C++
51 lines
1.5 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
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// <chrono>
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// abs
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// template <class Rep, class Period>
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// constexpr duration<Rep, Period> abs(duration<Rep, Period> d)
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#include <chrono>
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#include <type_traits>
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#include <cassert>
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template <class Duration>
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void
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test(const Duration& f, const Duration& d)
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{
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{
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typedef decltype(std::chrono::abs(f)) R;
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static_assert((std::is_same<R, Duration>::value), "");
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assert(std::chrono::abs(f) == d);
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}
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}
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int main()
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{
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// 7290000ms is 2 hours, 1 minute, and 30 seconds
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test(std::chrono::milliseconds( 7290000), std::chrono::milliseconds( 7290000));
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test(std::chrono::milliseconds(-7290000), std::chrono::milliseconds( 7290000));
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test(std::chrono::minutes( 122), std::chrono::minutes( 122));
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test(std::chrono::minutes(-122), std::chrono::minutes( 122));
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test(std::chrono::hours(0), std::chrono::hours(0));
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{
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// 9000000ms is 2 hours and 30 minutes
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constexpr std::chrono::hours h1 = std::chrono::abs(std::chrono::hours(-3));
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static_assert(h1.count() == 3, "");
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constexpr std::chrono::hours h2 = std::chrono::abs(std::chrono::hours(3));
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static_assert(h2.count() == 3, "");
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}
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}
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