Re: [Boost-users] [boost][range] fusion::begin and boost::begindontplay nice

From: Joel de Guzman (joel_at_[hidden])
Date: 2007-10-11 13:54:54

John Femiani wrote:

> Anyhow I would have thought either one of those two should work in this
> case.  Why doesn't boost::fusion::begin have a default implementation
> that calls boost::begin?
> 
> I am really thinking that fusion might not be what I thought it was; I
> thought I would be able to take a function that used to work on a
> homogeneous container and then I could 'fusion'-ize it so that the same
> code would compile with any heterogeneous container or homogenous
> container. Apparently this is not the case; I think I need to use Fusion
> for heterogeneous and Range for homogenous, and have separate code to
> deal with each.

No, it can't do that. It has nothing to do with being homogeneous
or heterogeneous. Fusion can only deal with data structures
(homogeneous or heterogeneous) with a size that is known at
compile time. Boost.Array is one such beast in the homogeneous
world.

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