Re: [boost] [ptr_container] iterators bug

From: David Abrahams (dave_at_[hidden])
Date: 2005-06-15 10:58:05

"Thorsten Ottosen" <nesotto_at_[hidden]> writes:

> "David Abrahams" <dave_at_[hidden]> wrote in message 
> news:uk6kws88y.fsf_at_boost-consulting.com...
>
> | If someone would clearly and succinctly spell out the question, I'd be
> | happy to.
>
> should one be able to add, subtract, and compare mutable random access 
> iterators with
> random access const_iterators provided they point to the same container?

There is no requirement that it be possible, and many early STL
implementations failed to make it possible.  It's generally regarded
as a poor QOI that doesn't allow it.  That capability is one of the
things that iterator_facade and iterator_adaptor make easy.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com