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

From: Hicham Mouline (hicham_at_[hidden])
Date: 2008-05-31 11:58:22

After some research, I found this post:
http://lists.boost.org/boost-users/2007/05/27648.php
that provides a 2-sequence cartesian product metafunction
that I will try to use to have the product of the 3 sequences
I have.

Rds,

-----Original Message-----
From: boost-users-bounces_at_[hidden]
[mailto:boost-users-bounces_at_[hidden]] On Behalf Of Steven Watanabe
Sent: 29 May 2008 23:53
To: boost-users_at_[hidden]
Subject: Re: [Boost-users] variant<> number of template arguments

AMDG

Hicham Mouline wrote:
>
> Question1: is the maximum number of variant<> arguments extendable?
>

The easiest way is to use make_variant_over which takes an MPL sequence.

> Question2: Below, some of the variants I have are full template specs.
>
> Is there a way to write the variant<> typedef with templates instead 
> and have
>
> the operator() of the static visitor a template member.
>
>  
>

I'm not sure what you want.  If the members of the variant have a common
interface, (For example if they all have a nested integer constant 
called value)
Then you can make the static visitor operator() a template and use this
common interface.

In Christ,
Steven Watanabe