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// Period shall be a specialization of ratio, diagnostic required.
15
16#include <chrono>
17
18template <int N, int D = 1>
19class Ratio
20{
21public:
22    static const int num = N;
23    static const int den = D;
24};
25
26int main()
27{
28    typedef std::chrono::duration<int, Ratio<1> > D;
29    D d;
30}
31