Re: Fixing ill-conditioned regular expressions. Proof of concept.

[Paul Eggert]

Alan Mackenzie wrote:
> More to the point, it is sometimes
> not possible to preserve the numbering of \(...\) constructs while
> fixing a regexp, which would change the match-data.

Sure, but you could remember how the \(...\) constructs were renumbered, and fix 
the match data after the underlying regexp call returned.  It shouldn't be a big 
deal.