From: Miles Bader <miles.bader@necel.com>
To: "Lennart Borgman \(gmail\)" <lennart.borgman@gmail.com>
Cc: Emacs Devel <emacs-devel@gnu.org>
Subject: Re: What is the difference between looking-at and an anchored search?
Date: Thu, 17 Jul 2008 21:17:49 +0900 [thread overview]
Message-ID: <buo7ibku2ky.fsf@dhapc248.dev.necel.com> (raw)
In-Reply-To: <487F2985.9080103@gmail.com> (Lennart Borgman's message of "Thu, 17 Jul 2008 13:14:13 +0200")
"Lennart Borgman (gmail)" <lennart.borgman@gmail.com> writes:
> looking-at does not have a BOUND parameter, but re-search-forward
> have. This makes re-search-forward a bit more flexible.
>
> I am looking at some code where I would have use for that flexibility,
> but I wonder if there is any drawback with replacing looking-at with
> re-search-forward (with an achored pattern).
>
> Is there any? Performance?
If you want to reject matches that extend past some point, just do
something like:
(and (looking-at REGEXP) (<= (match-end 0) BOUND))
-Miles
--
"Though they may have different meanings, the cries of 'Yeeeee-haw!' and
'Allahu akbar!' are, in spirit, not actually all that different."
next prev parent reply other threads:[~2008-07-17 12:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-17 11:14 What is the difference between looking-at and an anchored search? Lennart Borgman (gmail)
2008-07-17 12:17 ` Miles Bader [this message]
2008-07-17 12:21 ` Lennart Borgman
2008-07-17 12:29 ` Johan Bockgård
2008-07-17 17:45 ` Lennart Borgman (gmail)
2008-07-17 12:35 ` Miles Bader
2008-07-17 12:42 ` Lennart Borgman
2008-07-17 12:52 ` Miles Bader
2008-07-17 14:17 ` Lennart Borgman
2008-07-17 12:33 ` David Kastrup
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.gnu.org/software/emacs/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=buo7ibku2ky.fsf@dhapc248.dev.necel.com \
--to=miles.bader@necel.com \
--cc=emacs-devel@gnu.org \
--cc=lennart.borgman@gmail.com \
--cc=miles@gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.savannah.gnu.org/cgit/emacs.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).