-----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users- bounces@lists.boost.org] On Behalf Of David Abrahams Sent: Tuesday, July 26, 2005 5:41 PM To: boost-users@lists.boost.org Subject: Re: [Boost-users] [Iterators] Change in transform_iterator from1.31 to1.32?

Nat, what you are doing looks _really_ inefficient. The result of make_transform_iterator is some iterator type that's very different from, but convertible to, your const_iterator type. Going through that extra layer using boost::function means you are doing a lot of extra copying -- and potentially, dynamic memory allocation -- whenever you ask for an iterator.

[Nat] Truth to tell, I'm looking forward to when you introduce the equivalent of transform_iterator in Boost.Range... that will remove a lot of redundant declaration! ;-)