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 // duration
13 
14 // template <class Rep2, class Period2>
15 //   duration(const duration<Rep2, Period2>& d);
16 
17 // exact conversions allowed for integral reps
18 
19 #include <chrono>
20 #include <cassert>
21 
main()22 int main()
23 {
24     {
25     std::chrono::milliseconds ms(1);
26     std::chrono::microseconds us = ms;
27     assert(us.count() == 1000);
28     }
29 #ifndef _LIBCPP_HAS_NO_CONSTEXPR
30     {
31     constexpr std::chrono::milliseconds ms(1);
32     constexpr std::chrono::microseconds us = ms;
33     static_assert(us.count() == 1000, "");
34     }
35 #endif
36 }
37