Marshall Clow | 223df2e | 2015-11-05 19:33:59 +0000 | [diff] [blame] | 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++03, c++11, c++14 |
| 11 | // <chrono> |
| 12 | |
| 13 | // ceil |
| 14 | |
| 15 | // template <class ToDuration, class Clock, class Duration> |
| 16 | // time_point<Clock, ToDuration> |
| 17 | // ceil(const time_point<Clock, Duration>& t); |
| 18 | |
| 19 | #include <chrono> |
| 20 | #include <type_traits> |
| 21 | #include <cassert> |
| 22 | |
| 23 | template <class FromDuration, class ToDuration> |
| 24 | void |
| 25 | test(const FromDuration& df, const ToDuration& d) |
| 26 | { |
| 27 | typedef std::chrono::system_clock Clock; |
| 28 | typedef std::chrono::time_point<Clock, FromDuration> FromTimePoint; |
| 29 | typedef std::chrono::time_point<Clock, ToDuration> ToTimePoint; |
| 30 | { |
| 31 | FromTimePoint f(df); |
| 32 | ToTimePoint t(d); |
| 33 | typedef decltype(std::chrono::ceil<ToDuration>(f)) R; |
| 34 | static_assert((std::is_same<R, ToTimePoint>::value), ""); |
| 35 | assert(std::chrono::ceil<ToDuration>(f) == t); |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | template<class FromDuration, long long From, class ToDuration, long long To> |
| 40 | void test_constexpr () |
| 41 | { |
| 42 | typedef std::chrono::system_clock Clock; |
| 43 | typedef std::chrono::time_point<Clock, FromDuration> FromTimePoint; |
| 44 | typedef std::chrono::time_point<Clock, ToDuration> ToTimePoint; |
| 45 | { |
| 46 | constexpr FromTimePoint f{FromDuration{From}}; |
| 47 | constexpr ToTimePoint t{ToDuration{To}}; |
| 48 | static_assert(std::chrono::ceil<ToDuration>(f) == t, ""); |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | |
| 53 | int main() |
| 54 | { |
| 55 | // 7290000ms is 2 hours, 1 minute, and 30 seconds |
| 56 | test(std::chrono::milliseconds( 7290000), std::chrono::hours( 3)); |
| 57 | test(std::chrono::milliseconds(-7290000), std::chrono::hours(-2)); |
| 58 | test(std::chrono::milliseconds( 7290000), std::chrono::minutes( 122)); |
| 59 | test(std::chrono::milliseconds(-7290000), std::chrono::minutes(-121)); |
| 60 | |
| 61 | // 9000000ms is 2 hours and 30 minutes |
| 62 | test_constexpr<std::chrono::milliseconds, 9000000, std::chrono::hours, 3> (); |
| 63 | test_constexpr<std::chrono::milliseconds,-9000000, std::chrono::hours, -2> (); |
| 64 | test_constexpr<std::chrono::milliseconds, 9000001, std::chrono::minutes, 151> (); |
| 65 | test_constexpr<std::chrono::milliseconds,-9000001, std::chrono::minutes,-150> (); |
| 66 | |
| 67 | test_constexpr<std::chrono::milliseconds, 9000000, std::chrono::seconds, 9000> (); |
| 68 | test_constexpr<std::chrono::milliseconds,-9000000, std::chrono::seconds,-9000> (); |
| 69 | } |