GNU bug report logs - #24542
25.1.50; The symbol `@' and sexp scanning

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: "Drew Adams" <drew.adams <at> oracle.com>
Subject: bug#11314: closed (Re: bug#24542: 25.1.50; The symbol `@' and
 sexp scanning)
Date: Fri, 12 Apr 2024 17:30:05 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#24542: 24.1.50; Regression: incorrect Lisp indentation for `if' with `@@@@@@'

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 11314 <at> debbugs.gnu.org.

-- 
24542: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=24542
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Michael Heerdegen <michael_heerdegen <at> web.de>
Cc: 24542-done <at> debbugs.gnu.org
Subject: Re: bug#24542: 25.1.50; The symbol `@' and sexp scanning
Date: Fri, 12 Apr 2024 13:29:16 -0400

>>  (defvar emacs-lisp-mode-syntax-table
>>    (let ((table (make-syntax-table lisp-data-mode-syntax-table)))
>> -    ;; These are redundant, now.
>> -    ;;(modify-syntax-entry ?\[ "(]  " table)
>> -    ;;(modify-syntax-entry ?\] ")[  " table)
>> +    ;; `syntax-propertize'. takes care of `,@'.
>> +    (modify-syntax-entry ?@ "_" table)
>>      table)
>>    "Syntax table used in `emacs-lisp-mode'.")
>
> This seems to give good results for me - so far at least.

Thanks, pushed to `master`, closing.


        Stefan

[Message part 3 (message/rfc822, inline)]

From: "Drew Adams" <drew.adams <at> oracle.com>
To: <bug-gnu-emacs <at> gnu.org>
Subject: 24.1.50; Regression: incorrect Lisp indentation for `if' with `@@@@@@'
Date: Sun, 22 Apr 2012 17:56:10 -0700

emacs -Q
 
Type this into an Emacs Lisp buffer:
 
(if (alpha beta) C-j aaaaaa C-j bbbbbb
 
You get this:
 
(if (alpha beta)
    aaaaaa
  bbbbbb
 
That is correct.  bbbbbb is indented correctly.
 
Now do the same thing, using @@@@@@ instead of aaaaaa.  This is the
result - bbbbbb is indented incorrectly.
 
(if (alpha beta)
    @@@@@@
    bbbbbb
 
Yet @@@@@@ is a perfectly good symbol/variable name etc.
 
This regression was introduced in Emacs 22.
 

In GNU Emacs 24.1.50.1 (i386-mingw-nt5.1.2600)
 of 2012-04-19 on MARVIN
Bzr revision: 107968 monnier <at> iro.umontreal.ca-20120419220225-gijdcbfxuiqy5dhb
Windowing system distributor `Microsoft Corp.', version 5.1.2600
Configured using:
 `configure --with-gcc (4.6) --no-opt --enable-checking --cflags
 -ID:/devel/emacs/libs/libXpm-3.5.8/include
 -ID:/devel/emacs/libs/libXpm-3.5.8/src
 -ID:/devel/emacs/libs/libpng-dev_1.4.3-1/include
 -ID:/devel/emacs/libs/zlib-dev_1.2.5-2/include
 -ID:/devel/emacs/libs/giflib-4.1.4-1/include
 -ID:/devel/emacs/libs/jpeg-6b-4/include
 -ID:/devel/emacs/libs/tiff-3.8.2-1/include
 -ID:/devel/emacs/libs/gnutls-3.0.9/include
 -ID:/devel/emacs/libs/libiconv-1.13.1-1-dev/include
 -ID:/devel/emacs/libs/libxml2-2.7.8/include/libxml2'
 

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