Re: [Boost-users] variant<> number of template arguments

From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2008-05-31 14:50:38

AMDG

Hicham Mouline wrote:
>
> It seems make_variant_over is also limited by BOOST_VARIANT_LIMIT_TYPES.
> This macro is 20 on 2 platforms (linux-i386-gcc-4.1.2-boost-1.34.1 and
> win-i386-vs2005- boost-1.35.0)
>
> <snip>
>
>
> If I add type19, making the mpc vector have 21 types, compilation fails...
>   

The limit of variant and the limit of mpl::vector happen to be the same.
For more types, try using the numbered form of mpl vector which can
handle up to 50 arguments.

#include <boost/mpl/vector/vector30.hpp>

typedef boost::mpl::vector21<...> types;

In Christ,
Steven Watanabe