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// @(#)root/cont:$Id: TIterator.h 23212 2008-04-14 15:30:20Z rdm $
// Author: Fons Rademakers   13/08/95

/*************************************************************************
 * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/

#ifndef ROOT_TIterator
#define ROOT_TIterator


//////////////////////////////////////////////////////////////////////////
//                                                                      //
// TIterator                                                            //
//                                                                      //
// Iterator abstract base class. This base class provides the interface //
// for collection iterators.                                            //
//                                                                      //
//////////////////////////////////////////////////////////////////////////

#ifndef ROOT_Rtypes
#include "Rtypes.h"
#endif

class TCollection;
class TObject;

class TIterator {

protected:
   TIterator() { }
   TIterator(const TIterator &) { }

public:
   virtual TIterator &operator=(const TIterator &) { return *this; }
   virtual ~TIterator() { }
   virtual const TCollection *GetCollection() const = 0;
   virtual Option_t *GetOption() const { return ""; }
   virtual TObject  *Next() = 0;
   virtual void      Reset() = 0;
   TObject          *operator()() { return Next(); }
   virtual bool      operator!=(const TIterator &) const;
   virtual TObject  *operator*() const;

   ClassDef(TIterator,0)  //Iterator abstract base class
};

#endif
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