Re: [boost] Re: iterator adaptors problem

From: Pavol Droba (droba_at_[hidden])
Date: 2004-03-09 17:27:53

On Tue, Mar 09, 2004 at 01:40:50PM -0800, Thomas Witt wrote:
> Pavol Droba wrote:
> 
> >Hi,
> >
> >I have a problem with iterator_facade usage. Error is reported by Comeau 
> >and MIPSPro compilers:
> >
> >An error output can be found in regression tables:
> >
> >http://tinyurl.com/37mxz
> >
> >The compiler is reporting, that iterator_core_access cannot access
> >the private equal() function, althought it has been marked as friend.
> 
> IIUC the compiler is right. The friend declaration in 
> boost::algorithm::find_iterator declares 
> boost::algorithm::iterator_core_access as friend. Not 
> boost::iterator_core_access. IIUC there is no name lookup on unqualified 
> names in friend class declarations. See core issue 138 for further 
> information.
> 
> Changing the friend declaration to friend class 
> ::boost::iterator_core_access should fix the problem.
> 

Thanks for explanation. I didn't know about this issue, although it perfectly 
makes sense. IMO such an issue should be noted in the iterator_facade docs 
and examples, because it can be easily overlooked (at least I overlooked it 
very easily:) )

Regards,

Pavol