BidIt.h

#pragma once


#include <libutl/FwdIt.h>


UTL_NS_BEGIN;



class BidIt : public FwdIt
{
    UTL_CLASS_DECL_ABC(BidIt, FwdIt);
    UTL_CLASS_DEFID;

public:
    virtual void reverse(size_t dist = 1) = 0;

    BidIt& operator--()
    {
        reverse();
        return *this;
    }

    void operator--(int)
    {
        reverse();
    }

    BidIt& operator-=(size_t dist)
    {
        reverse(dist);
        return *this;
    }

public:
    // for STL
    typedef Object* value_type;
    typedef Object*& reference;
    typedef Object** pointer;
    typedef std::bidirectional_iterator_tag iterator_category;
    typedef std::ptrdiff_t difference_type;
};


UTL_NS_END;


#include <libutl/TBidIt.h>