Re: [Boost-users] Iterators and subclasses

Subject: Re: [Boost-users] Iterators and subclasses
From: Swerts, Benjamin (Benjamin.Swerts_at_[hidden])
Date: 2009-10-19 09:10:07

> Can't your iterator just hold on to a "container" base class 
> ref, an incrementable index and call the above virtual method 
> in the iterator's deref implementation?
> 
> Jeff

> Look at Adobe's any_iterator
> http://stlab.adobe.com/classadobe_1_1any__iterator.html
> 
> In Christ,
> Steven Watanabe

Jeff, Steven, thank you both for the excellent suggestions. I finally
had some time to revisit this problem and currently have something
working based on Jeff's idea. It does provide the simplest interface for
people wanting to subclass (only 2 functions to implement instead of a
complete subclass of boost::iterator_facade). 
AFAICS Adobe's any_iterator will not be more efficient because they
mention a heap allocation is needed. I couldn't check its code, however,
as the any_iterator class is mentioned nowhere in the source
distribution (or I'm too stupid to find it in 1.0.42).

Thanks again.
Greets,

        Ben