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From: "Andreas Röhler" <andreas.roehler@easy-emacs.de>
To: Dmitry Gutov <dgutov@yandex.ru>
Cc: help-gnu-emacs <help-gnu-emacs@gnu.org>, Tassilo Horn <tsdh@gnu.org>
Subject: Re: `looking-back' strange warning
Date: Thu, 01 Oct 2015 10:46:42 +0200	[thread overview]
Message-ID: <560CF2F2.1060601@easy-emacs.de> (raw)
In-Reply-To: <878u7nhueu.fsf@gnu.org>


Am 01.10.2015 um 10:20 schrieb Tassilo Horn:
> Andreas Röhler <andreas.roehler@easy-emacs.de> writes:
>
>>>> Docu bug?
>>> It's a feature: calling `looking-back' without LIMIT is slow, don't do that.
>> Hmm, would volontier to make that fast instead - if write-permission
>> is given :)
> Looking at the code, I'd say `looking-back' is only slow if GREEDY is t
> in which case the start of the match may be before LIMIT anyhow.  So I
> don't see how providing a LIMIT would help too much, or is
> `re-search-backward' already slow without LIMIT?

AFAIK thats it.

Also "greedy" seems not to work at all:

(defun foo3 ())

(progn (re-search-backward "o+" nil t 3)
        (message "%s" (match-beginning 0)))

The first "o" is reported as match-beginning.




  reply	other threads:[~2015-10-01  8:46 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-09-30  8:25 `looking-back' strange warning Andreas Röhler
2015-10-01  6:20 ` Michael Heerdegen
2015-10-01  6:25 ` Tassilo Horn
2015-10-01  6:50 ` Dmitry Gutov
2015-10-01  7:49   ` Andreas Röhler
2015-10-01  8:20     ` Tassilo Horn
2015-10-01  8:46       ` Andreas Röhler [this message]
2015-10-01  9:29         ` Tassilo Horn
2015-10-02  0:10       ` Stefan Monnier
2015-10-02 15:21         ` Tassilo Horn
2015-10-01 16:00   ` Drew Adams
2015-10-01 17:56     ` Dmitry Gutov
2015-10-01 18:24       ` Andreas Röhler
2015-10-01 18:59         ` Dmitry Gutov
2015-10-01 19:55           ` Andreas Röhler
2015-10-01 20:26             ` Dmitry Gutov
2015-10-02  0:15             ` Stefan Monnier
2015-10-02  1:18               ` Michael Heerdegen
2015-10-02  5:13                 ` Drew Adams
2015-10-02 20:28                   ` Drew Adams
2015-10-02 20:59                     ` Tassilo Horn
2015-10-02 21:35                       ` Drew Adams
2015-10-03  6:26                         ` Tassilo Horn
2015-10-03  6:45                           ` Andreas Röhler
2015-10-03 15:20                             ` Drew Adams
2015-10-03 15:17                           ` Drew Adams
2015-10-02  1:19               ` Michael Heerdegen
2015-10-02  5:12               ` Drew Adams
2015-10-02  6:16                 ` Andreas Röhler
2015-10-02  6:36                   ` Michael Heerdegen
2015-10-02 12:46                 ` Stefan Monnier
2015-10-02 15:02                   ` Drew Adams
2015-10-02 19:08               ` Tom Tromey
2015-10-02 19:33                 ` Stefan Monnier
2015-10-03 18:11                   ` Stefan Monnier
     [not found]   ` <mailman.176.1443721449.16064.help-gnu-emacs@gnu.org>
2015-10-01 18:50     ` Barry Margolin
     [not found]     ` <<barmar-D40496.14502501102015@88-209-239-213.giganet.hu>
2015-10-01 23:42       ` Drew Adams
2015-10-02  0:12         ` Stefan Monnier
2015-10-02  5:10           ` Drew Adams
2015-10-02 12:48             ` Stefan Monnier
2015-10-02 15:03               ` Drew Adams
2015-10-02 15:21                 ` Stefan Monnier
2015-10-02 15:24                   ` Drew Adams
2015-10-02 19:28                     ` Stefan Monnier
2015-10-01 12:35 ` Artur Malabarba
     [not found] <<560B9C7F.2060301@easy-emacs.de>

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