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 // duration& operator--();
15 
16 #include <chrono>
17 #include <cassert>
18 
19 int main()
20 {
21     std::chrono::hours h(3);
22     std::chrono::hours& href = --h;
23     assert(&href == &h);
24     assert(h.count() == 2);
25 }
26