1c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant//===----------------------------------------------------------------------===// 2c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 3c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// The LLVM Compiler Infrastructure 4c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 5b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open 6b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// Source Licenses. See LICENSE.TXT for details. 7c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 8c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant//===----------------------------------------------------------------------===// 9c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 10c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// <chrono> 11c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 12c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// duration 13c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 14c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// template <class ToDuration, class Rep, class Period> 15473f838128bcf118ab50d08a65a83433ed1b015aHoward Hinnant// constexpr 16c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// ToDuration 17c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// duration_cast(const duration<Rep, Period>& d); 18c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 19c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant#include <chrono> 20c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant#include <type_traits> 21c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant#include <cassert> 22c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 23c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnanttemplate <class ToDuration, class FromDuration> 24c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnantvoid 25c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnanttest(const FromDuration& f, const ToDuration& d) 26c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant{ 27473f838128bcf118ab50d08a65a83433ed1b015aHoward Hinnant { 28c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant typedef decltype(std::chrono::duration_cast<ToDuration>(f)) R; 29c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant static_assert((std::is_same<R, ToDuration>::value), ""); 30c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(std::chrono::duration_cast<ToDuration>(f) == d); 31473f838128bcf118ab50d08a65a83433ed1b015aHoward Hinnant } 32c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant} 33c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 34c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnantint main() 35c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant{ 36c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant test(std::chrono::milliseconds(7265000), std::chrono::hours(2)); 37c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant test(std::chrono::milliseconds(7265000), std::chrono::minutes(121)); 38c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant test(std::chrono::milliseconds(7265000), std::chrono::seconds(7265)); 39c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant test(std::chrono::milliseconds(7265000), std::chrono::milliseconds(7265000)); 40c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant test(std::chrono::milliseconds(7265000), std::chrono::microseconds(7265000000LL)); 41c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant test(std::chrono::milliseconds(7265000), std::chrono::nanoseconds(7265000000000LL)); 42c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant test(std::chrono::milliseconds(7265000), 43c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::chrono::duration<double, std::ratio<3600> >(7265./3600)); 44c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant test(std::chrono::duration<int, std::ratio<2, 3> >(9), 45c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::chrono::duration<int, std::ratio<3, 5> >(10)); 46473f838128bcf118ab50d08a65a83433ed1b015aHoward Hinnant#ifndef _LIBCPP_HAS_NO_CONSTEXPR 47473f838128bcf118ab50d08a65a83433ed1b015aHoward Hinnant { 48473f838128bcf118ab50d08a65a83433ed1b015aHoward Hinnant constexpr std::chrono::hours h = std::chrono::duration_cast<std::chrono::hours>(std::chrono::milliseconds(7265000)); 49473f838128bcf118ab50d08a65a83433ed1b015aHoward Hinnant static_assert(h.count() == 2, ""); 50473f838128bcf118ab50d08a65a83433ed1b015aHoward Hinnant } 51473f838128bcf118ab50d08a65a83433ed1b015aHoward Hinnant#endif 52c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant} 53