Re: [boost] BOOST_PP_ITERATE for huge mpl and fusion

Subject: Re: [boost] BOOST_PP_ITERATE for huge mpl and fusion
From: Joel de Guzman (joel_at_[hidden])
Date: 2012-03-20 07:51:17

On 3/20/2012 7:35 PM, Hite, Christopher wrote:
> It may work for MPL I just upgraded boost and fusion now checks the limit and
> complains:
> 
> boost_1_49_0/boost/fusion/container/map/detail/preprocessed/as_map.hpp:21:2: error:
> #error "FUSION_MAX_MAP_SIZE out of bounds for preprocessed headers"
> 
> I spent about an hour trying to hack around that.  It looks like I'll either have to
> change boost or copy paste a good deal of fusion's details into a header.
> 
> I realize you're not repsonsible for fusion, but as far as I can tell the other
> libraries copied your techniques and if we figure this out for MPL we can apply it to
> them too.

No, Fusion does not use MPL's techniques at all. It does not use any scripts
to generate the prepreocessed headers. Instead, Fusion uses Wave. Ditto for
Phoenix-3. Going beyond the limts is very simple: simply #define
BOOST_FUSION_DONT_USE_PREPROCESSED_FILES.

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