Re: [boost] [fusion] boost::array problem under msvc-8.0

From: Joel de Guzman (joel_at_[hidden])
Date: 2006-11-20 18:29:01

Michael Marcin wrote:
> Hi,
> 
> I've been toying around with the idea of using fusion in my geometry 
> library (at least that seems to be the terminology in use around here). 
> I started reading the documentation and I ran into a problem with the 
> firs thing I tried to do.
> 
[...]
> 
> fails to compile with:

[...]
> 
> changing deref::call from:
> return it.array[Iterator::index::value];
> to:
> return it.array.at( Iterator::index::value );
> 
> causes it to compile so I'm thinking it is a compiler bug that needs to 
> be worked around.

It is indeed a compiler bug, but I think there's more to it than that.
With your fix, VC7.1 complains: boost\array.hpp(159) : error C3861:
'size': identifier not found, even with argument-dependent lookup
while VC8 is ok. This is not a problem on any other compiler though.
Also, it's funny that the fusion test for array is also ok. I noted
that the thing that's causing problems is the header include:

     #include <boost/array.hpp>
     #include <boost/fusion/iterator.hpp>
     #include <boost/fusion/sequence.hpp>

Changing this to

     #include <boost/array.hpp>
     #include <boost/fusion/sequence/adapted/array.hpp>
     #include <boost/fusion/sequence/intrinsic.hpp>

makes VC++ happy.

I'll investigate further...

Regards,
-- 
Joel de Guzman
http://www.boost-consulting.com
http://spirit.sf.net