Re: [Emacs-diffs] master 938d252 4/4: Make regex matching reentrant; update syntax during match

[Perry E. Metzger]

On Tue, 19 Jun 2018 16:58:15 +0200 Andreas Schwab <address@hidden>
wrote:
> On Jun 19 2018, Daniel Colascione <address@hidden> wrote:
> 
> > IMHO, back reference support is an old unix mistake. I can't
> > think of a time when I've wanted to actually use them, but their
> > theoretical use is still a hindrance. One option would be to just
> > deprecate them.  
> 
> There are quite a few uses in Emacs.

I agree that they're a mistake, but we're a bit stuck. The right
thing, I think, is using a library like TRE that uses a fast
algorithm whenever a backreference isn't in use.

Perry
-- 
Perry E. Metzger                address@hidden