Re: [boost] [iterators] zip_iterator doesn't work with GCC's TR1 tuple?

Subject: Re: [boost] [iterators] zip_iterator doesn't work with GCC's TR1 tuple?
From: Shayne_Fletcher_at_[hidden]
Date: 2008-12-09 23:34:19

Joel de Guzman wrote on 10/12/2008 13:19:34:

> Dean Michael Berris wrote:
> > On Wed, Dec 10, 2008 at 1:37 AM, David Abrahams <dave_at_[hidden]> 
wrote:
> >> on Tue Dec 09 2008, David Abrahams <dave-AT-boostpro.com> wrote:
> >>> I have a fusion-based implementation checked in on a branch 
somewhere.
> >> Here:
> >>
> >>  http://svn.boost.
> 
org/svn/boost/branches/zip_iterator_fusion/boost/boost/iterator/zip_iterator.
> hpp
> >>
> > 
> > Thanks Dave, I'll give this a try.
> 
> It needs a little work for fusion still. While fusion is TR1
> savvy, it thinks (through Boost TR1 [http://tinyurl.com/5awnzn])
> that it *is* TR1. Not any other rendition of it. So, fusion
> needs to somehow detect which TR1 version you are using (Boost
> or gcc). In the case of Boost, nothing needs to be done. In the
> case of GCC's, fusion needs an adapter similar to that of
> fusion/boost_tuple adapter.
> 
> Any suggestion on a better way to do the mapping/adapting
> appreciated. Adapting fusion to any other tuple-like entity
> is easy (Dean, you might want to give it a try, patch welcome).
> The tricky part is how to disable the one over the other on
> availability.

It should be also noted that Dave's program as posted will need a little
work to be made compatible with the current state of fusion. It appears to
have been based on a pre-review version.

-- 
Shayne Fletcher
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