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-=(const duration& d);
15
16#include <chrono>
17#include <cassert>
18
19int main()
20{
21    std::chrono::seconds s(3);
22    s -= std::chrono::seconds(2);
23    assert(s.count() == 1);
24    s -= std::chrono::minutes(2);
25    assert(s.count() == -119);
26}
27