-/* Copyright (c) 2016. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2016-2021. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
* @endcode
*
*/
-struct SimulationClock {
+class SimulationClock {
+public:
using rep = double;
using period = std::ratio<1>;
using duration = std::chrono::duration<rep, period>;