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Rozental, Gennadiy wrote:
|>-----BEGIN PGP SIGNED MESSAGE----- |>Hash: SHA1 |> |>Rozental, Gennadiy wrote: |> |>| 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 behaviour/interface of a thing. Ther is nothing a pair provides that can be reused so adaption is pointless.
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 seperated from the actual iterator_adaption.
Thomas
- -- Dipl.-Ing. Thomas Witt Institut fuer Verkehrswesen, Eisenbahnbau und -betrieb, Universitaet Hannover voice: +49(0) 511 762 - 4273, fax: +49(0) 511 762-3001 http://www.ive.uni-hannover.de -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (MingW32) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org
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