transformedviewcursor.h

// Description: TransformedViewCursor class
// Documentation: concrete_views.txt

#ifndef PASTELSYS_TRANSFORMEDVIEWCURSOR_H
#define PASTELSYS_TRANSFORMEDVIEWCURSOR_H

#include "pastel/sys/view/transformedview.h"

namespace Pastel
{

    namespace TransformedView_
    {

        template <integer N, typename TransformFunctor, typename ConstCursor>
        class ConstTransformedViewCursor
        {
        public:
            using Element = typename TransformFunctor::Output_;
            using ConstReference = Element const&;

            explicit ConstTransformedViewCursor(
                const ConstCursor& cursor,
                const TransformFunctor& transform)
                : cursor_(cursor)
                , transform_(transform)
            {
            }

            void swap(ConstTransformedViewCursor& that)
            {
                cursor_.swap(that.cursor_);
                std::swap(transform_, that.transform_);
            }

            void increment(integer index)
            {
                cursor_.increment(index);
            }

            void decrement(integer index)
            {
                cursor_.decrement(index);
            }

            void move(Vector<integer, N> amount)
            {
                cursor_.move(amount);
            }

            /*
           const Element* operator->() const
           {
               return cursor_.operator->();
           }
           */

            Element operator*() const
            {
                return transform_(*cursor_);
            }

        private:
            ConstCursor cursor_;
            TransformFunctor transform_;
        };

    }

}

#endif