Dan Albert | 287553d | 2017-02-16 10:47:51 -0800 | [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 | // <chrono> |
| 11 | |
| 12 | // time_point |
| 13 | |
| 14 | // template <class Clock, class Duration1, class Rep2, class Period2> |
| 15 | // time_point<Clock, typename common_type<Duration1, duration<Rep2, Period2>>::type> |
| 16 | // operator-(const time_point<Clock, Duration1>& lhs, const duration<Rep2, Period2>& rhs); |
| 17 | |
| 18 | #include <chrono> |
| 19 | #include <cassert> |
| 20 | |
| 21 | int main() |
| 22 | { |
| 23 | typedef std::chrono::system_clock Clock; |
| 24 | typedef std::chrono::milliseconds Duration1; |
| 25 | typedef std::chrono::microseconds Duration2; |
| 26 | { |
| 27 | std::chrono::time_point<Clock, Duration1> t1(Duration1(3)); |
| 28 | std::chrono::time_point<Clock, Duration2> t2 = t1 - Duration2(5); |
| 29 | assert(t2.time_since_epoch() == Duration2(2995)); |
| 30 | } |
| 31 | #if _LIBCPP_STD_VER > 11 |
| 32 | { |
| 33 | constexpr std::chrono::time_point<Clock, Duration1> t1(Duration1(3)); |
| 34 | constexpr std::chrono::time_point<Clock, Duration2> t2 = t1 - Duration2(5); |
| 35 | static_assert(t2.time_since_epoch() == Duration2(2995), ""); |
| 36 | } |
| 37 | #endif |
| 38 | } |