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
main()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 }
39