Re: [Gnu-arch-users] Preventing matches in regular expressions

[Aaron Bentley]

Tom Lord wrote:
> Currently the `inventory' categorization model is, in essense, a very
> specific `find(1)' expression.  Reinterpreting the categorization
> model as a `lex'-like lexer specification is possible, desirable, and
> only a small change (measured in modified LOCs).

Well, it sounds like a good idea to me too.

>     > Well, first we need to fix the cut operator handling.
>
> Maybe my recollection is wrong.   I thought that the only issue,
> really, was that the Posix code was conservatively deciding that 
> it needed to use backtracking matching in some case where it doesn't
> really have to.   I.e., wasn't it something like finding the right
> line of code and changing a 0 to a 1 to turn on the optimization?

I think so, but I'm just going on my vague recollection of our discussion.

> Rx is kind of hairy, to be sure.   I'm looking forward to rewriting it
> xl someday :-)   But I think this particular change is pretty
> minor....

This is what you characterized as The Lightbulb in a recent email, 
right?  Small change, big repurcussions for screwup?

Aaron

--
Aaron Bentley
Director of Technology
Panometrics, Inc.