[boost] Re: [MPL] zip_view documentation bug?

From: David Abrahams (dave_at_[hidden])
Date: 2004-12-27 14:20:42

David Greene wrote:
> I think I've found either a bug in zip_view with gcc or a bug
> in the zip_view docs.
> 
> If I try to use a zip_view<> in which the sequences are not all
> of the same length, the compiler goes into "infinite" recursion
> instantiating at<> templates until it hits the instantiation
> limit.
> 
> According to the MPL reference manual, the size<> of the
> sequence should be the minimum of the size<>es of all the
> participating sequences.
> 
> At first I thought this was only a problem when one of the
> sequences is empty but I was able to reproduce it with
> populated sequences of varying length.  Just two is enough
> to expose it.
> 
> This is a problem with gcc 3.2, 3.3 and 3.4.
> 
> I can work around the problem by using iterator_range<> and
> copy<> to truncate the sequences before feeding them to
> zip_view<>.
> 
> What's supposed to happen in this case?

Can you post a minimal reproducible test case please?

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