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 12 // <chrono> 13 14 // ceil 15 16 // template <class ToDuration, class Rep, class Period> 17 // constexpr 18 // ToDuration 19 // ceil(const duration<Rep, Period>& d); 20 21 #include <chrono> 22 #include <type_traits> 23 #include <cassert> 24 25 template <class ToDuration, class FromDuration> 26 void 27 test(const FromDuration& f, const ToDuration& d) 28 { 29 { 30 typedef decltype(std::chrono::ceil<ToDuration>(f)) R; 31 static_assert((std::is_same<R, ToDuration>::value), ""); 32 assert(std::chrono::ceil<ToDuration>(f) == d); 33 } 34 } 35 36 int main() 37 { 38 // 7290000ms is 2 hours, 1 minute, and 30 seconds 39 test(std::chrono::milliseconds( 7290000), std::chrono::hours( 3)); 40 test(std::chrono::milliseconds(-7290000), std::chrono::hours(-2)); 41 test(std::chrono::milliseconds( 7290000), std::chrono::minutes( 122)); 42 test(std::chrono::milliseconds(-7290000), std::chrono::minutes(-121)); 43 44 { 45 // 9000000ms is 2 hours and 30 minutes 46 constexpr std::chrono::hours h1 = std::chrono::ceil<std::chrono::hours>(std::chrono::milliseconds(9000000)); 47 static_assert(h1.count() == 3, ""); 48 constexpr std::chrono::hours h2 = std::chrono::ceil<std::chrono::hours>(std::chrono::milliseconds(-9000000)); 49 static_assert(h2.count() == -2, ""); 50 } 51 } 52
