RE: Argh! Regular expressions in Lua

["Paul Hudson" <phudson@...>]

>- Roberto already tried and concluded it is too costly. I doubt being 
able to do better...

I assumed that was what Luiz was saying when he said the reason was

> Size and complexity.

P.
-----Original Message-----
From: lua-bounces@bazar2.conectiva.com.br
[mailto:lua-bounces@bazar2.conectiva.com.br] On Behalf Of Philippe Lhoste
Sent: 22 November 2006 17:40
To: lua@bazar2.conectiva.com.br
Subject: Re: Argh! Regular expressions in Lua

Paul Hudson wrote:
>>  Well, (ab)* isn't so complex, both to implement (I think) or 
>> conceptually (that's not (?<=\w{5})...).
> 
> Go on then :)
> 
> (i.e. let's see an implementation and see how much bigger it gets. The
> difference quoted in the Lua docs between the Lua regexps and PCRE seems
> quite large, and there's presumably a reason for that)

I might, as the subject interest me, but it would be a waste of time if:
- Roberto already tried and concluded it is too costly. I doubt being 
able to do better...
- Patch won't be looked at.

Gavin Wraith wrote:
 > In googling about I have come across pattern
 > matching packages that claim to be "compact and fast", e.g.
 > http://www.univ-rouen.fr/LIFAR/aia/ccp.html .
 > Maybe these epithets are relative.

This one is "free for academic research only."...


Mmm, I just discovered that SciTE's simple engine doesn't handle such 
construct (ie. repetition on a group of chars) either. I overlooked that!
Well, perhaps I can try to improve that and see if it is even doable 
simply... If I fail, I suppose I should have just shut my mouth. ;-)

-- 
Philippe Lhoste
--  (near) Paris -- France
--  http://Phi.Lho.free.fr
--  --  --  --  --  --  --  --  --  --  --  --  --  --


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