//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <chrono>

// duration

// duration operator-() const;

#include <chrono>
#include <cassert>

int main()
{
    const std::chrono::minutes m(3);
    std::chrono::minutes m2 = -m;
    assert(m2.count() == -m.count());
}