[Boost-users] Re: Converting from const to non-const withiterator_adaptor

From: David Abrahams (dave_at_[hidden])
Date: 2004-01-08 12:45:15

"Keith MacDonald" <boost_at_[hidden]> writes:

>> I was quoting the same documentation you referred to.
>
> OK, but my quote came from the front page (index.html), so I read that
> first.  Perhaps that section should be rewritten.

I realize the measure of docs is in their effectiveness, but do you
really think there's anything wrong with painting with a broad brush
on the main page and then providing detailed revision in specific
docs?

>> I'd love to.  If I'm to use your code wholesale, I'll need you to
>> add the standard boost copyright and license reference.
>
> I've done that, and attach the new source.  However, I hereby relinquish all
> rights over baz2.cpp, so feel free to do whatever you like with it.

Thanks.

> When I attempted to integrate the iterators with my actual code, I hit a
> problem that I don't know how to resolve with iterator_facade.  To
> illustrate it, I've modified the example code and attach it as baz3.cpp.
> Now, Node is an abstract base class, and DerivedNode is instantiated.
> Compiling it results in the following error:
>
> \CVS\boost\boost\iterator\iterator_facade.hpp(389) : error C2259:
> 'Node' : cannot instantiate abstract class due to following members:
> 'int Node::getInfo(void) const' : pure virtual function was not defined
>
> Can your technique be used in such contexts?
>
> Thanks,
> Keith MacDonald
>
>
>
>

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