1//===----------------------------------------------------------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is dual licensed under the MIT and the University of Illinois Open 6// Source Licenses. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10// <chrono> 11 12// time_point 13 14// template <class ToDuration, class Clock, class Duration> 15// time_point<Clock, ToDuration> 16// time_point_cast(const time_point<Clock, Duration>& t); 17 18#include <chrono> 19#include <type_traits> 20#include <cassert> 21 22template <class FromDuration, class ToDuration> 23void 24test(const FromDuration& df, const ToDuration& d) 25{ 26 typedef std::chrono::system_clock Clock; 27 typedef std::chrono::time_point<Clock, FromDuration> FromTimePoint; 28 typedef std::chrono::time_point<Clock, ToDuration> ToTimePoint; 29 { 30 FromTimePoint f(df); 31 ToTimePoint t(d); 32 typedef decltype(std::chrono::time_point_cast<ToDuration>(f)) R; 33 static_assert((std::is_same<R, ToTimePoint>::value), ""); 34 assert(std::chrono::time_point_cast<ToDuration>(f) == t); 35 } 36} 37 38#if _LIBCPP_STD_VER > 11 39 40template<class FromDuration, long long From, class ToDuration, long long To> 41void test_constexpr () 42{ 43 typedef std::chrono::system_clock Clock; 44 typedef std::chrono::time_point<Clock, FromDuration> FromTimePoint; 45 typedef std::chrono::time_point<Clock, ToDuration> ToTimePoint; 46 { 47 constexpr FromTimePoint f{FromDuration{From}}; 48 constexpr ToTimePoint t{ToDuration{To}}; 49 static_assert(std::chrono::time_point_cast<ToDuration>(f) == t, ""); 50 } 51 52} 53 54#endif 55 56int main() 57{ 58 test(std::chrono::milliseconds(7265000), std::chrono::hours(2)); 59 test(std::chrono::milliseconds(7265000), std::chrono::minutes(121)); 60 test(std::chrono::milliseconds(7265000), std::chrono::seconds(7265)); 61 test(std::chrono::milliseconds(7265000), std::chrono::milliseconds(7265000)); 62 test(std::chrono::milliseconds(7265000), std::chrono::microseconds(7265000000LL)); 63 test(std::chrono::milliseconds(7265000), std::chrono::nanoseconds(7265000000000LL)); 64 test(std::chrono::milliseconds(7265000), 65 std::chrono::duration<double, std::ratio<3600> >(7265./3600)); 66 test(std::chrono::duration<int, std::ratio<2, 3> >(9), 67 std::chrono::duration<int, std::ratio<3, 5> >(10)); 68#if _LIBCPP_STD_VER > 11 69 { 70 test_constexpr<std::chrono::milliseconds, 7265000, std::chrono::hours, 2> (); 71 test_constexpr<std::chrono::milliseconds, 7265000, std::chrono::minutes,121> (); 72 test_constexpr<std::chrono::milliseconds, 7265000, std::chrono::seconds,7265> (); 73 test_constexpr<std::chrono::milliseconds, 7265000, std::chrono::milliseconds,7265000> (); 74 test_constexpr<std::chrono::milliseconds, 7265000, std::chrono::microseconds,7265000000LL> (); 75 test_constexpr<std::chrono::milliseconds, 7265000, std::chrono::nanoseconds,7265000000000LL> (); 76 typedef std::chrono::duration<int, std::ratio<3, 5>> T1; 77 test_constexpr<std::chrono::duration<int, std::ratio<2, 3>>, 9, T1, 10> (); 78 } 79#endif 80} 81