GNU bug report logs - #1299
lispref - searching.texi: Updating of looking-back arguments and return values in the example

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From: help-debbugs <at> gnu.org (Emacs bug Tracking System)
To: Chong Yidong <cyd <at> stupidchicken.com>
Subject: bug#1299: marked as done (lispref - searching.texi: Updating of 
 looking-back arguments and return values in the example)

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Your message dated Mon, 03 Nov 2008 14:21:31 -0500
with message-id <87abcgk43o.fsf <at> cyd.mit.edu>
and subject line Re: bug#1299: lispref - searching.texi: Updating of looking-back arguments and return values in the example
has caused the Emacs bug report #1299,
regarding lispref - searching.texi: Updating of looking-back arguments and return values in the example
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
bug report if necessary, and/or fix the problem forthwith.

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-- 
1299: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=1299
Emacs Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Seweryn Kokot <sewkokot <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: lispref - searching.texi: Updating of looking-back arguments and return values in the example
Date: Sun, 02 Nov 2008 20:06:29 +0100

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Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

See the diff attached. Note that I copied the explanation for greedy
argument of `looking-back' function. Because I'm not a native speaker
so probably this paragraph requires some rephrasing. 

[searching.diff (text/x-diff, inline)]

diff -ud /home/sewi/emacs_cvs/emacs/doc/lispref/searching.texi /home/sewi/emacs_cvs/emacs/doc/lispref/searching_cor.texi
--- /home/sewi/zrodla/elisp_files/emacs_cvs/emacs/doc/lispref/searching.texi	2008-11-02 19:39:21.000000000 +0100
+++ /home/sewi/zrodla/elisp_files/emacs_cvs/emacs/doc/lispref/searching_cor.texi	2008-11-02 19:54:10.000000000 +0100
@@ -1094,7 +1094,7 @@
 @end example
 @end defun
 
-@defun looking-back regexp &optional limit
+@defun looking-back regexp &optional limit greedy
 This function returns @code{t} if @var{regexp} matches text before
 point, ending at point, and @code{nil} otherwise.
 
@@ -1105,6 +1105,10 @@
 not to search before @var{limit}.  In this case, the match that is
 found must begin at or after @var{limit}.
 
+If greedy is non-nil, extend the match backwards as far as possible,
+stopping when a single additional previous character cannot be part
+of a match for regexp.
+
 @example
 @group
 ---------- Buffer: foo ----------
@@ -1408,7 +1412,7 @@
   (re-search-forward "The \\(cat \\)")
   (match-beginning 0)
   (match-beginning 1))
-    @result{} (9 9 13)
+    @result{} (17 9 13)
 @end group
 
 @group

Diff finished.  Sun Nov  2 19:54:17 2008

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-- 
regards,
Seweryn Kokot

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From: Chong Yidong <cyd <at> stupidchicken.com>
To: Seweryn Kokot <sewkokot <at> gmail.com>
Cc: 1299-done <at> debbugs.gnu.org, martin rudalics <rudalics <at> gmx.at>
Subject: Re: bug#1299: lispref - searching.texi: Updating of looking-back arguments and return values in the example
Date: Mon, 03 Nov 2008 14:21:31 -0500

Seweryn Kokot <sewkokot <at> gmail.com> wrote:

> See the diff attached. Note that I copied the explanation for greedy
> argument of `looking-back' function.

Thanks.  I've checked in your patch with some minor modifications.


martin rudalics <rudalics <at> gmx.at> wrote:

> FWIW, it might not harm to also resolve the contradiction that REGEXP
> can match _before_ LIMIT when GREEDY is non-nil (in the manual _and_
> the doc-string).

I noted this in the manual and the doc-string.  Thanks.

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