Re: [boost] proto::or_ arity

From: Larry Evans (cppljevans_at_[hidden])
Date: 2007-04-20 07:15:51

On 04/19/2007 09:33 PM, Eric Niebler wrote:
[snip]
> 
> The pattern _ is a wildcard that matches anything. So not_<_> is a 
> degenerate pattern that matches nothing.
> 

The "wildcard" is the concept I was missing :(  Although I remember
reading about it, my mind was still thinking that proto's _ was somehow
like mpl's _, i.e. somehow like an argument placeholder. Thanks
very much for the clarification and please excuse my not rereading
the docs.

-regards,
Larry