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 // UNSUPPORTED: c++98, c++03, c++11, c++14 11 // <chrono> 12 13 // floor 14 15 // template <class ToDuration, class Rep, class Period> 16 // constexpr 17 // ToDuration 18 // floor(const duration<Rep, Period>& d); 19 20 #include <chrono> 21 #include <type_traits> 22 #include <cassert> 23 24 template <class ToDuration, class FromDuration> 25 void 26 test(const FromDuration& f, const ToDuration& d) 27 { 28 { 29 typedef decltype(std::chrono::floor<ToDuration>(f)) R; 30 static_assert((std::is_same<R, ToDuration>::value), ""); 31 assert(std::chrono::floor<ToDuration>(f) == d); 32 } 33 } 34 35 int main() 36 { 37 // 7290000ms is 2 hours, 1 minute, and 30 seconds 38 test(std::chrono::milliseconds( 7290000), std::chrono::hours( 2)); 39 test(std::chrono::milliseconds(-7290000), std::chrono::hours(-3)); 40 test(std::chrono::milliseconds( 7290000), std::chrono::minutes( 121)); 41 test(std::chrono::milliseconds(-7290000), std::chrono::minutes(-122)); 42 43 { 44 // 9000000ms is 2 hours and 30 minutes 45 constexpr std::chrono::hours h1 = std::chrono::floor<std::chrono::hours>(std::chrono::milliseconds(9000000)); 46 static_assert(h1.count() == 2, ""); 47 constexpr std::chrono::hours h2 = std::chrono::floor<std::chrono::hours>(std::chrono::milliseconds(-9000000)); 48 static_assert(h2.count() == -3, ""); 49 } 50 } 51
