Re: [Boost-users] boost::any question

From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2008-05-21 09:38:08

AMDG

Igor R. wrote:
> > and there is the problem. I think the variant datatype can use only 
> 10 different parameters. Isn't it?
>  
> The maximal number of types is limited by _BOOST_VARIANT_LIMIT_TYPES_ 
> <http://www.boost.org/doc/libs/1_35_0/doc/html/BOOST_VARIANT_LIMIT_TYPES.html> macro, 
> which is defined in 1.35 as follows:
>  
> #if !defined(BOOST_MPL_LIMIT_LIST_SIZE)
> #   define BOOST_MPL_LIMIT_LIST_SIZE 20
> #endif
>
> #define BOOST_VARIANT_LIMIT_TYPES BOOST_MPL_LIMIT_LIST_SIZE
>  
> So it's default is 20, but IIUC you can set it to anything (>=10)
>  

In Addition, you can bypass this limitation by using make_variant_over, 
which takes an
MPL sequence.

In Christ,
Steven Watanabe