Observer.h

#ifndef UTIL_OBSERVER_H
#define UTIL_OBSERVER_H 

/*
* Util Package - C++ Utilities for Scientific Computation
*
* Copyright 2010 - 2017, The Regents of the University of Minnesota
* Distributed under the terms of the GNU General Public License.
*/

namespace Util
{

   template <typename Event>
   class Observer
   {

   public:

      // Default constructor.

      virtual ~Observer();
   
      virtual void update(const Event& event) = 0;

   };

   // Destructor
   template <typename Event>
   Observer<Event>::~Observer()
   {}

}

#endif