Re: [Boost-users] boost.variant as argument

From: Jeffrey A. Edlund (jedlund_at_[hidden])
Date: 2008-04-10 01:59:31

On Thu, 10 Apr 2008 07:21:08 +0200
Olaf Peter <ope-devel_at_[hidden]> wrote:

> Thank you Jeffrey.
> 
> > typedef boost::variant<double, bool>  double_variant;
> > typedef boost::tuple<double_variant,double_variant>  double_tuple;
> ...
> > std::ostream& operator<<( std::ostream& os, const double_variant& p )
> > {
> >     output_visitor out_v(os);
> >     boost::apply_visitor(out_v,p);
> >     return os;
> > }
> ...
> 
> This works, but is there a generic way without global typedefs?

You don't have to use the typedefs.  Just replace double_variant with boost::variant<double, bool> and double_tuple with boost::tuple<double_variant,double_variant>.  Is that what you were asking?

Jeffrey