EvaluationTracer.h

//-*-C++-*-
/***************************************************************************
 *
 *   Copyright (C) 2008 by Willem van Straten
 *   Licensed under the Academic Free License version 2.1
 *
 ***************************************************************************/
 
// psrchive/More/MEAL/MEAL/EvaluationTracer.h
 
#ifndef __MEAL_EvaluationTracer_H
#define __MEAL_EvaluationTracer_H
 
#include "MEAL/Tracer.h"
 
namespace MEAL
{
 
  template<class T>
  class EvaluationTracer : public Tracer
  {
 
  public:
 
    typedef typename T::Result Result;
 
    EvaluationTracer (T* _model = 0) { if (_model) watch (_model); }
 
    virtual void watch (T* _model) { Tmodel=_model; Tracer::watch(_model); }
 
  protected:
 
    Reference::To<T> Tmodel;
 
    Result current_value;
 
    void report ()
    {
      Result val=Tmodel->evaluate();
      if (val == current_value)
        return;
      current_value = val;
      std::cerr << "EvaluationTracer::report " << model->get_name() << " "
                << current_value << std::endl;
    }
 
  };
 
}
 
#endif