DerefIterator.h

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#ifndef DEREF_ITERATOR_H
#define DEREF_ITERATOR_H

#include "y2storage/AppUtil.h"

template< class Iter, class Value > 
class DerefIterator : public Iter
    {
    public:
        typedef Value value_type;
        typedef Value& reference;
        typedef Value* pointer;
        typedef typename Iter::difference_type difference_type;
        typedef typename Iter::iterator_category iterator_category;

        DerefIterator() {}

        DerefIterator( const Iter& i ) : Iter(i) {}

        DerefIterator& operator++() { Iter::operator++(); return(*this); }
        DerefIterator operator++(int) 
            {
            y2warning( "Expensive ++ DerefIterator" );
            DerefIterator tmp(*this);
            Iter::operator++();
            return(tmp);
            }
        DerefIterator& operator--() { Iter::operator--(); return(*this); }
        DerefIterator operator--(int) 
            {
            y2warning( "Expensive -- DerefIterator" );
            DerefIterator tmp(*this);
            Iter::operator--();
            return(tmp);
            }

        reference operator*() const 
            {
            return( *Iter::operator*() );
            }

        pointer operator->() const 
            {
            return( Iter::operator*() );
            }
    };

#endif

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