VoidObserver.h

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
 
#pragma once
 
 
namespace Belle2 {
  class VoidObserver {
  public:
 
    template <  typename ... types >
    static void notify(const types& ...) {};
 
    template <  typename ... types >
    static bool initialize(const types& ...) { return true; };
 
    template <  typename ... types >
    static void prepare(const types& ...) {};
 
    template <  typename ... types >
    static void collect(const types& ...) {};
 
 
    VoidObserver() {};
 
    ~VoidObserver() {};
 
 
    template <  typename ... types >
    static void terminate(const types& ...) {};
  };
}