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// template <class Rep1, class Period1, class Clock, class Duration2>
19//   time_point<Clock, typename common_type<duration<Rep1, Period1>, Duration2>::type>
20//   operator+(const duration<Rep1, Period1>& lhs, const time_point<Clock, Duration2>& rhs);
21
22#include <chrono>
23#include <cassert>
24
25int main()
26{
27    typedef std::chrono::system_clock Clock;
28    typedef std::chrono::milliseconds Duration1;
29    typedef std::chrono::microseconds Duration2;
30    {
31    std::chrono::time_point<Clock, Duration1> t1(Duration1(3));
32    std::chrono::time_point<Clock, Duration2> t2 = t1 + Duration2(5);
33    assert(t2.time_since_epoch() == Duration2(3005));
34    t2 = Duration2(6) + t1;
35    assert(t2.time_since_epoch() == Duration2(3006));
36    }
37#if _LIBCPP_STD_VER > 11
38    {
39    constexpr std::chrono::time_point<Clock, Duration1> t1(Duration1(3));
40    constexpr std::chrono::time_point<Clock, Duration2> t2 = t1 + Duration2(5);
41    static_assert(t2.time_since_epoch() == Duration2(3005), "");
42    constexpr std::chrono::time_point<Clock, Duration2> t3 = Duration2(6) + t1;
43    static_assert(t3.time_since_epoch() == Duration2(3006), "");
44    }
45#endif
46}
47