IterPair.h

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#ifndef ITER_PAIR_H
#define ITER_PAIR_H

#include <iterator>

template< class Iter >
class IterPair
    {
    public:
        typedef Iter itype; 
        IterPair( const Iter b, const Iter e ) : m_begin(b), m_end(e) {}
        IterPair( const IterPair& x ) 
            {
            *this = x;
            }
        IterPair& operator=(const IterPair& x) 
            { 
            m_begin=x.m_begin; 
            m_end=x.m_end;
            return( *this );
            }
        bool operator==(const IterPair& x) const
            { 
            return( m_begin==x.m_begin && m_end==x.m_end );
            }
        bool empty() const { return( m_begin==m_end ); }
        unsigned length() const { return( std::distance( m_begin, m_end )); }
        Iter begin() const { return( m_begin ); }
        Iter end() const { return( m_end ); }
    protected:
        Iter m_begin;
        Iter m_end;
    };

template< class Container, class Iter >
IterPair<Iter> MakeIterPair( Container& c )
    {
    return( IterPair<Iter>( c.begin(), c.end() ));
    }

template< class Pred, class Iter >
class MakeCondIterPair : public IterPair<Iter>
    {
    typedef IterPair<Iter> _bclass;
    public:
        MakeCondIterPair( const Iter& b, const Iter& e ) :
            _bclass( b, e ) {}
    };

#endif

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