1223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow//===----------------------------------------------------------------------===// 2223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow// 3223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow// The LLVM Compiler Infrastructure 4223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow// 5223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow// This file is dual licensed under the MIT and the University of Illinois Open 6223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow// Source Licenses. See LICENSE.TXT for details. 7223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow// 8223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow//===----------------------------------------------------------------------===// 9223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow 101575e3e813f7f7cde31e699802fa1fcf8e84531cAsiri Rathnayake// UNSUPPORTED: c++98, c++03, c++11, c++14 11223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow 12223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow// <chrono> 13223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow 14223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow// abs 15223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow 16223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow// template <class Rep, class Period> 17223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow// constexpr duration<Rep, Period> abs(duration<Rep, Period> d) 18223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow 19223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow#include <chrono> 20223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow#include <type_traits> 21223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow#include <cassert> 22223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow 23223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clowtemplate <class Duration> 24223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clowvoid 25223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clowtest(const Duration& f, const Duration& d) 26223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow{ 27223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow { 28223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow typedef decltype(std::chrono::abs(f)) R; 29223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow static_assert((std::is_same<R, Duration>::value), ""); 30223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow assert(std::chrono::abs(f) == d); 31223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow } 32223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow} 33223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow 34223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clowint main() 35223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow{ 36223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow// 7290000ms is 2 hours, 1 minute, and 30 seconds 37223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow test(std::chrono::milliseconds( 7290000), std::chrono::milliseconds( 7290000)); 38223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow test(std::chrono::milliseconds(-7290000), std::chrono::milliseconds( 7290000)); 39223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow test(std::chrono::minutes( 122), std::chrono::minutes( 122)); 40223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow test(std::chrono::minutes(-122), std::chrono::minutes( 122)); 41223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow test(std::chrono::hours(0), std::chrono::hours(0)); 42223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow 43223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow { 44223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow// 9000000ms is 2 hours and 30 minutes 45223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow constexpr std::chrono::hours h1 = std::chrono::abs(std::chrono::hours(-3)); 46223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow static_assert(h1.count() == 3, ""); 47223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow constexpr std::chrono::hours h2 = std::chrono::abs(std::chrono::hours(3)); 48223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow static_assert(h2.count() == 3, ""); 49223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow } 50223df2ef0f543f7fef9270b3b34b9c73c869a006Marshall Clow} 51