Err, I think you were thinking of (??{ ... }). That's overkill, in my opinion. Your approach doesn't work, since (?{ ... }) merely executes code, it doesn't use it as part of the regex.

_____________________________________________________
Jeff[japhy]Pinyan: Perl, regex, and perl hacker.
s++=END;++y(;-P)}y js++=;shajsj<++y(p-q)}?print:??;