Re: [boost] [fusion] sequence member pointer

Subject: Re: [boost] [fusion] sequence member pointer
From: Joel de Guzman (joel_at_[hidden])
Date: 2011-02-24 23:09:41

On 2/25/2011 10:44 AM, Daniel Larimer wrote:
> I am attempting to use a fusion sequence with a visitor pattern that expects 'member function' or 'member data' pointers.
>
> What I would like to do is something like:
>
> &fusion::vector<int,double>::m1
>
> But obviously this cannot work because of how fusion::vector<int,double>  is implemented with a single vector_n<...>  vec data member that is private.
>
> So trying to "reflect" a vector in the same way that I "reflect" a struct does not work.
>
> Any good ideas?   Is there any reason why this 'implementation detail' needs to be hidden?

Well, the proper way is to use fusion::for_each(s) and you don't have to
care what the internal structure of s is. I highly suggest that you use
the fusion algorithms to walk through (visit) a fusion sequence.

Regards,
-- 
Joel de Guzman
http://www.boostpro.com
http://boost-spirit.com