Now I got it, thanks.
It�s not clear indeed.

bnegrao.
>
> You should ask its author, not this list. Nevertheless, since the
> source is there, I had a look. All it does is offer a function
> that reports whether Perl has at this point seen one of the match
> variables you mention. I expected that much after reading the
> POD, of course, but it wasn't clear.
>
> -- 
> Regards,
> Aristotle
>
> "If you can't laugh at yourself, you don't take life seriously enough."
>

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