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Re: when options conflict
From: |
Tony Abou-Assaleh |
Subject: |
Re: when options conflict |
Date: |
Mon, 22 May 2006 01:08:58 -0300 (ADT) |
On Sun, 21 May 2006, Bob Proulx wrote:
> Tony Abou-Assaleh wrote:
> > > > -- Aborting in error for -G/-F/-E/-P,
> > >
> > > Definitely. Otherwise someone might think that something
> > > like 'grep -E -e extendedpattern -P -e perlpattern' would work.
> >
> > It would be awesome if one could do that! This should go into feature
> > requests.
>
> How often would syntax like that really be used? Sure it would be
> cool. But I think people wanting pcre patterns would simply want them
> all of the time. Is there really enough need to match different
> styles of regular expressions to warrent the work to put that into the
> code? I doubt it would be worth it in actual usage.
For most everyday usages by most users, the current feature set is
sufficient. I can surely think of situations where the above syntax may
make a lot of sense.
Example: you have complex patterns, in general -E is faster than -P, but
some patterns require the features of -P. If you have a large file, and
these days it is not uncommon to have large files (or a lot of small
ones), such optimization may give noticeable difference in performance.
I haven't done benchmarking, so the above is hypothetical.
Since we're not doing any new features at the moment, nor in the near
future, and such a feature as above would be of somewhat low priority due
to its complexity, my comment was half sarcastic.
Cheers,
TAA
-----------------------------------------------------
Tony Abou-Assaleh
Lecturer, Computer Science Department
Brock University, St. Catharines, ON, Canada, L2S 3A1
Office: MC J215
Tel: +1(905)688-5550 ext. 5243
Fax: +1(905)688-3255
Email: address@hidden
WWW: http://www.cosc.brocku.ca/~taa/
----------------------[THE END]----------------------
- Re: when options conflict, (continued)
- Re: when options conflict, Benno Schulenberg, 2006/05/22
- Re: when options conflict, Paul Eggert, 2006/05/23
- Re: when options conflict, Benno Schulenberg, 2006/05/23
- Re: when options conflict, Julian Foad, 2006/05/25
- Re: when options conflict, Tony Abou-Assaleh, 2006/05/26
- Re: when options conflict, Tony Abou-Assaleh, 2006/05/22
- Re: when options conflict, Paul Eggert, 2006/05/23
- Re: when options conflict, Tony Abou-Assaleh, 2006/05/23
Re: when options conflict, Tony Abou-Assaleh, 2006/05/20