[boost] Re: circular_buffer question

From: David Abrahams (dave_at_[hidden])
Date: 2004-04-13 21:50:54

"Neal D. Becker" <ndbecker2_at_[hidden]> writes:

> OK, I think I have answered my own question.  Here is an adaptation of
> cycle_iterator to new boost iterator adaptors:
>
> //  (C) Copyright Gennadiy Rozental 2002.
> //  Permission to copy, use, modify, sell and distribute this software
> //  is granted provided this copyright notice appears in all copies.
> //  This software is provided "as is" without express or implied warranty,
> //  and with no claim as to its suitability for any purpose.
> //
> //  See http://www.boost.org for most recent version including documentation.
>
>
>
> #ifndef CYCLE_ITERATOR_HPP
> #define CYCLE_ITERATOR_HPP
>
> #include<boost/iterator/iterator_adaptor.hpp>
> #include<utility>
>
> namespace boost {
>
>   template<typename BaseIterator>
>   class cycle_iterator : public boost::iterator_adaptor<
>     cycle_iterator<BaseIterator>,
>     BaseIterator> {
>
>     friend class iterator_core_access;

If you're going to make the core functions public, there's really no
reason to make iterator_core_access a friend.  Why not make increment
et al private?

-- 
Dave Abrahams
Boost Consulting
http://www.boost-consulting.com