From: Vinicius Jose Latorre <viniciusjl@ig.com.br>
To: herring@lanl.gov
Cc: GNU Emacs <emacs-devel@gnu.org>
Subject: Re: Possible problem with looking-back function
Date: Thu, 19 Aug 2010 23:11:29 -0300 [thread overview]
Message-ID: <4C6DE451.5080706@ig.com.br> (raw)
In-Reply-To: <49933.130.55.132.107.1282185810.squirrel@webmail.lanl.gov>
>> Shouldn't it return 1?
>
> The algorithm searches backward until it finds a position from which there
> is a match that extends to point. Doing more would be quadratic in the
> value of point (at least), so is considered too slow.
Ok, so looking-back should be replaced by:
(progn
(goto-char 11) ; go to end of buffer
;; ---- looking-back replacement --- BEGIN
(save-excursion
(when (/= 0 (skip-chars-backward " \t\n" 1))
(unless (bolp)
(forward-line 1))
(looking-at "^\\([ \t\n]+\\)")))
;; ---- looking-back replacement --- END
(match-beginning 1))
Now it returns 1.
next prev parent reply other threads:[~2010-08-20 2:11 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-19 1:15 Possible problem with looking-back function Vinicius Jose Latorre
2010-08-19 2:43 ` Davis Herring
2010-08-19 6:09 ` Andreas Röhler
2010-08-19 8:01 ` Stefan Monnier
2010-08-19 9:02 ` Stephen J. Turnbull
2010-08-19 9:32 ` Andreas Röhler
2010-08-20 2:11 ` Vinicius Jose Latorre [this message]
2010-08-20 13:07 ` Stefan Monnier
2010-08-21 0:08 ` Vinicius Jose Latorre
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