> |>| What is the problem adapting pair of iterators to scalar > vectors to > |>produce > |>| an iterator with complex value type? > |> > |>The problem is you can hardly adapt a pair. So using > iterator_adaptor > |>(the new class template) does not provide any benefit. > | > | > | Why is that? > > The whole point in adapting is that you modify some but not > all behavior/interface of a thing. There is nothing a pair > provides that can be reused so adoption is pointless.
There is all that we need so we could create valid iterator. As for how much we will need to overwrite - it still less then writing iterator from scratch. > That's why the new version provides iterator_facade and > iterator_adaptor. iterator_facade helps with implementing > iterators, iterator_adaptor is for adapting iterator like types. > > | I did not look in depth on new version but I remember that old one > | allowed to adapt any source. > > You needed to do this as the iterator interface > implementation was not separated from the actual iterator_adaption. I do not argue which version better fit for the task. I just saying that it could be easily done with old version either. Gennadiy. _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
