# Base class for all iterators using functional types.
private abstract class FunIter[OLD,NEW]
        super Iterator[NEW]
        var my_iter: Iterator[OLD]

        redef fun next
        do
                my_iter.next
        end

        redef fun start
        do
                my_iter.start
        end

        redef fun finish
        do
                my_iter.finish
        end

        redef fun is_ok
        do
                return my_iter.is_ok
        end
end