Lars Magne Ingebrigtsen <larsi <at> gnus.org>
to control <at> debbugs.gnu.org.
Full text available.Glenn Morris <rgm <at> gnu.org>
to control <at> emacsbugs.donarmstrong.com.
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Date: Wed, 01 Oct 2008 22:21:11 +0200
From: Markus Sauermann <markus <at> sauermann-consulting.de>
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To: 1012 <at> debbugs.gnu.org
Subject: Re: bug#1012: Indentation of constant symbols
References: <48D9F761.1000805 <at> gmx.at> <48D68650.1040907 <at> sauermann-consulting.de> <handler.1012.D1012.12222446017991.notifdone <at> emacsbugs.donarmstrong.com>
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Hello,
my bug fix was not farsighted enough. Basically I fixed a part of the
source code, which does nothing at all.
I dug a bit deeper and noticed, that the following "source code 1" of
the function calculate-lisp-indent in lisp-mode.el is a little bugged.
--- BEGIN source code 1 ---
;; If the function has no special alignment
;; or it does not apply to this argument,
;; try to align a constant-symbol under the last
;; preceding constant symbol, if there is such one of
;; the last 2 preceding symbols, in the previous
;; uncommented line.
(and (save-excursion
(goto-char indent-point)
(skip-chars-forward " \t")
(looking-at ":"))
;; The last sexp may not be at the indentation
;; where it begins, so find that one, instead.
(save-excursion
(goto-char calculate-lisp-indent-last-sexp)
;; Handle prefix characters and whitespace
;; following an open paren. (Bug#1012)
(backward-prefix-chars)
(while (and (not (looking-back "^[ \t]*\\|([ \t]+"))
(or (not containing-sexp)
(< (1+ containing-sexp) (point))))
(forward-sexp -1)
(backward-prefix-chars))
(setq calculate-lisp-indent-last-sexp (point)))
(> calculate-lisp-indent-last-sexp
(save-excursion
(goto-char (1+ containing-sexp))
(parse-partial-sexp (point)
calculate-lisp-indent-last-sexp 0 t)
(point)))
(let ((parse-sexp-ignore-comments t)
indent)
(goto-char calculate-lisp-indent-last-sexp)
(or (and (looking-at ":")
(setq indent (current-column)))
(and (< (save-excursion (beginning-of-line)
(point))
(prog2 (backward-sexp) (point)))
(looking-at ":")
(setq indent (current-column))))
indent))
--- END source code 1 ---
One part of that code implements the functionality as described in the
comment at the beginning of the code. The other part tries to fix a
problem, that is caused by this functionality, which is denoted in
example 1, where :baz should be aligned under :foo and not under :foo2.
--- BEGIN example 1 ---
(:foo bar :foo2 bar2
:baz ar)
--- END example 1 ---
But this other part makes constant symbols to be indented in the same
way as the usual indentation does. So discarding the whole code does not
change any indentation except in some rare, mostly unused cases. See
examples 2 for code snippets that are indented in the same way with or
without this code.
--- BEGIN examples 2 ---
(:foo bar
:baz)
(foo bar :baz
:foo2)
(foo bar :baz bor
:foo2)
(:foo bar (:bar baz
:asd))
--- END examples 2 ---
These examples also contradict the description of the source code. I
even think that the description of the code is not what the special
handling of constant symbols should be like, as it causes the
indentation described in example 1.
So I suggest to treat constant symbols in the following way:
If the sexp, preceding the constant symbol, begins in the same line as
the containing sexp, then align it under the first appearance of a
constant symbol between the beginning of the containing sexp and
the the begin of the preceding sexp.
If the sexp, preceding the constant symbol, does not begin in the same
line as the containing sexp, then special treatment is not necessary,
because it is handled by the usual indentation.
Do not treat a constant symbol in a special way, if the containing sexp
is a vector, since this would cause indentations in unwanted places.
After applying "patch-1.txt", which implements this suggestions, the
code in examples 2 is indented as shown in examples 3.
--- BEGIN examples 3 ---
(:foo bar
:baz)
(foo bar :baz
:foo2)
(foo bar :baz bor
:foo2)
(:foo bar (:bar baz
:asd))
--- END examples 3 ---
This implementation still has shortcomings in several unusual
conditions, as examples 4 show, but I think this patch covers all common
usages.
--- BEGIN examples 4 ---
(:foo cons :foo2
(bar baz :asd asd)
:sad)
(:foo (:bar baz
:asd asd) :con con2
:sad)
--- END examples 4 ---
Regards,
Markus Sauermann
--------------010308050807050500050004
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name="patch-1.txt"
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filename="patch-1.txt"
Index: lisp-mode.el
===================================================================
RCS file: /sources/emacs/emacs/lisp/emacs-lisp/lisp-mode.el,v
retrieving revision 1.228
diff -c -r1.228 lisp-mode.el
*** lisp-mode.el 23 Sep 2008 17:59:28 -0000 1.228
--- lisp-mode.el 1 Oct 2008 19:10:51 -0000
***************
*** 1014,1055 ****
(not retry)
(funcall lisp-indent-function indent-point state))
;; If the function has no special alignment
! ;; or it does not apply to this argument,
! ;; try to align a constant-symbol under the last
! ;; preceding constant symbol, if there is such one of
! ;; the last 2 preceding symbols, in the previous
! ;; uncommented line.
(and (save-excursion
(goto-char indent-point)
(skip-chars-forward " \t")
(looking-at ":"))
! ;; The last sexp may not be at the indentation
! ;; where it begins, so find that one, instead.
! (save-excursion
! (goto-char calculate-lisp-indent-last-sexp)
! ;; Handle prefix characters and whitespace
! ;; following an open paren. (Bug#1012)
! (backward-prefix-chars)
! (while (and (not (looking-back "^[ \t]*\\|([ \t]+"))
! (or (not containing-sexp)
! (< (1+ containing-sexp) (point))))
! (forward-sexp -1)
! (backward-prefix-chars))
! (setq calculate-lisp-indent-last-sexp (point)))
! (> calculate-lisp-indent-last-sexp
! (save-excursion
! (goto-char (1+ containing-sexp))
! (parse-partial-sexp (point) calculate-lisp-indent-last-sexp 0 t)
! (point)))
(let ((parse-sexp-ignore-comments t)
indent)
! (goto-char calculate-lisp-indent-last-sexp)
! (or (and (looking-at ":")
! (setq indent (current-column)))
! (and (< (save-excursion (beginning-of-line) (point))
! (prog2 (backward-sexp) (point)))
! (looking-at ":")
! (setq indent (current-column))))
indent))
;; another symbols or constants not preceded by a constant
;; as defined above.
--- 1014,1046 ----
(not retry)
(funcall lisp-indent-function indent-point state))
;; If the function has no special alignment
! ;; or it does not apply to this argument,
! ;; try to treat a constant symbol in a special way.
(and (save-excursion
(goto-char indent-point)
(skip-chars-forward " \t")
(looking-at ":"))
! ;; Treat it only special, if the sexp preceding it begins
! ;; in the same line as the containing sexp
! (< calculate-lisp-indent-last-sexp
! (save-excursion (goto-char containing-sexp)
! (end-of-line) (point)))
! ;; Don't treat it special, if the containing sexp is a
! ;; vector
! (save-excursion (goto-char containing-sexp)
! (not (looking-at "\\[")))
! ;; Align it under the first constant symbol, if any,
! ;; between the beginning of the containing sexp and
! ;; the preceding sexp
(let ((parse-sexp-ignore-comments t)
indent)
! (goto-char (1+ containing-sexp))
! (while (and (<= (point) calculate-lisp-indent-last-sexp)
! (not indent))
! (skip-syntax-forward "-")
! (if (looking-at ":")
! (setq indent (current-column))
! (forward-sexp)))
indent))
;; another symbols or constants not preceded by a constant
;; as defined above.
--------------010308050807050500050004--
Markus Sauermann <markus <at> sauermann-consulting.de>:Emacs Bugs <bug-gnu-emacs <at> gnu.org>.
Full text available.bug-submit-list <at> lists.donarmstrong.com, Emacs Bugs <bug-gnu-emacs <at> gnu.org>:bug#1012; Package emacs.
Full text available.Received: (at unknown) by unknown; unknown X-Spam-Checker-Version: SpamAssassin 3.2.3-bugs.debian.org_2005_01_02 (2007-08-08) on rzlab.ucr.edu X-Spam-Level: X-Spam-Status: No, score=-6.6 required=4.0 tests=AWL,BAYES_00,HAS_BUG_NUMBER, MURPHY_DRUGS_REL8 autolearn=ham version=3.2.3-bugs.debian.org_2005_01_02 Received: (at 1012-done) by emacsbugs.donarmstrong.com; 24 Sep 2008 08:23:21 +0000 Received: from mail.gmx.net (mail.gmx.net [213.165.64.20]) by rzlab.ucr.edu (8.13.8/8.13.8/Debian-3) with SMTP id m8O8NEk2007982 for <1012-done <at> emacsbugs.donarmstrong.com>; Wed, 24 Sep 2008 01:23:15 -0700 Received: (qmail invoked by alias); 24 Sep 2008 08:23:08 -0000 Received: from 62-47-41-49.adsl.highway.telekom.at (EHLO [62.47.41.49]) [62.47.41.49] by mail.gmx.net (mp042) with SMTP; 24 Sep 2008 10:23:08 +0200 X-Authenticated: #14592706 X-Provags-ID: V01U2FsdGVkX18qZ/kSu3Yqxwog3yXQ6TEu5RqmMi1EKFQsP+HgJf XIDyDRYAn8HM+k Message-ID: <48D9F761.1000805 <at> gmx.at> Date: Wed, 24 Sep 2008 10:16:33 +0200 From: martin rudalics <rudalics <at> gmx.at> User-Agent: Thunderbird 2.0.0.16 (Windows/20080708) MIME-Version: 1.0 To: 1012-done <at> debbugs.gnu.org CC: Markus Sauermann <markus <at> sauermann-consulting.de> Subject: Re: bug#1012: calculate-lisp-indent References: <48D895C4.6020901 <at> gmx.at> In-Reply-To: <48D895C4.6020901 <at> gmx.at> Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit X-Y-GMX-Trusted: 0 X-FuHaFi: 0.73 Fixed as: 2008-09-23 Markus Sauermann <markus <at> sauermann-consulting.de> (tiny change) * emacs-lisp/emacslisp-mode.el (calculate-lisp-indent): Fix indentation problem with keyword symbols when a list starts with ,@ or spaces. (Bug#1012) Thanks for the patch, martin
Markus Sauermann <markus <at> sauermann-consulting.de>:martin rudalics <rudalics <at> gmx.at>:
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From: martin rudalics <rudalics <at> gmx.at>
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To: 1012 <at> debbugs.gnu.org
CC: Markus Sauermann <markus <at> sauermann-consulting.de>
Subject: Re: bug#1012: calculate-lisp-indent
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> In this E-Mail I included a patch, that solves the problems for me, and
> was created with the command
>
> mhoram <at> revelstone:~/emacs/trunk/emacs/lisp$ cvs diff -c >
> ~/emacs-bugreport.txt
>
> The patch works for scenario 1 by an additional call of the
> (backward-prefix-chars) function, which sets point back to the beginning
> of ",@".
> For scenario 2 the addition of "\\|([ \t]+" solves the problem, by not
> entering the while-loop (and thus calling the function (forward-sexp
> -1)), if there are only spaces between the "(" and the first object.
Thank you, applied.
martin
martin rudalics <rudalics <at> gmx.at>:Emacs Bugs <bug-gnu-emacs <at> gnu.org>.
Full text available.bug-submit-list <at> lists.donarmstrong.com, Emacs Bugs <bug-gnu-emacs <at> gnu.org>:bug#1012; Package emacs.
Full text available.
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Date: Sun, 21 Sep 2008 19:37:20 +0200
From: Markus Sauermann <markus <at> sauermann-consulting.de>
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To: bug-gnu-emacs <at> gnu.org
Subject: calculate-lisp-indent
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Hello,
I found a bug concerning the function calculate-lisp-indent in lisp-mode.el.
It is triggered in the following scenarios (-!- marks the point):
---begin scenario 1 buffer *scratch*---
(,@foo
:bar)-!-
---end scenario 1 buffer *scratch*---
---begin scenario 2 buffer *scratch*---
( foo
:bar)-!-
---end scenario 2 buffer *scratch*---
Using <tab> (bound to the function lisp-indent-line) triggers the
following error in both scenarios:
---begin error---
forward-sexp: Scan error: "Containing expression ends prematurely", 192, 192
---end error---
I traced this bug to the function calculate-lisp-indent.
As far as I understand the code, the characters ",@" in scenario 1 and
the spaces in scenario 2 are not treated correctly.
In this E-Mail I included a patch, that solves the problems for me, and
was created with the command
mhoram <at> revelstone:~/emacs/trunk/emacs/lisp$ cvs diff -c >
~/emacs-bugreport.txt
The patch works for scenario 1 by an additional call of the
(backward-prefix-chars) function, which sets point back to the beginning
of ",@".
For scenario 2 the addition of "\\|([ \t]+" solves the problem, by not
entering the while-loop (and thus calling the function (forward-sexp
-1)), if there are only spaces between the "(" and the first object.
Regards,
Markus Sauermann
In GNU Emacs 22.3.1 (i386-mingw-nt6.0.6001)
of 2008-09-06 on SOFT-MJASON
Windowing system distributor `Microsoft Corp.', version 6.0.6001
configured using `configure --with-gcc (3.4)'
Important settings:
value of $LC_ALL: nil
value of $LC_COLLATE: nil
value of $LC_CTYPE: nil
value of $LC_MESSAGES: nil
value of $LC_MONETARY: nil
value of $LC_NUMERIC: nil
value of $LC_TIME: nil
value of $LANG: DEU
locale-coding-system: cp1252
default-enable-multibyte-characters: t
Major mode: Lisp Interaction
Minor modes in effect:
encoded-kbd-mode: t
tooltip-mode: t
tool-bar-mode: t
mouse-wheel-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
unify-8859-on-encoding-mode: t
utf-translate-cjk-mode: t
auto-compression-mode: t
line-number-mode: t
Recent input:
<help-echo> <help-echo> <help-echo> <help-echo> q (
, @ f o o <return> <tab> : b a r ) <tab> M-x r e p
o r t <tab> <return>
Recent messages:
("D:\\Uninstalled\\emacs-22.3\\bin\\emacs.exe" "-q")
Loading encoded-kb...done
For information about GNU Emacs and the GNU system, type C-h C-a.
forward-sexp: Scan error: "Containing expression ends prematurely", 192, 192
Loading emacsbug...
Loading regexp-opt...done
Loading emacsbug...done
--
Markus Sauermann E-Mail: info <at> sauermann-consulting.de
Clemensstr. 55 Rgb. Web: http://www.sauermann-consulting.de
80803 München Tel: 089/337707, 0179/9879005, Fax: 089/38476434
--------------070203090003050805040103
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name="emacs-bugreport.txt"
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Index: ChangeLog
===================================================================
RCS file: /sources/emacs/emacs/lisp/ChangeLog,v
retrieving revision 1.14493
diff -c -r1.14493 ChangeLog
*** ChangeLog 20 Sep 2008 22:09:39 -0000 1.14493
--- ChangeLog 21 Sep 2008 17:08:59 -0000
***************
*** 1,3 ****
--- 1,9 ----
+ 2008-09-21 Markus Sauermann <markus <at> sauermann-consulting.de>
+
+ * emacs-lisp/lisp-mode.el (calculate-lisp-indent):
+ Fix indentation problem with keyword symbols when a list starts
+ with ,@ or spaces.
+
2008-09-20 Vincent Belaïche <vincent.b.1 <at> hotmail.fr>
* calc/calc-vec.el (calcFunc-venum): Properly handle intervals.
Index: emacs-lisp/lisp-mode.el
===================================================================
RCS file: /sources/emacs/emacs/lisp/emacs-lisp/lisp-mode.el,v
retrieving revision 1.226
diff -c -r1.226 lisp-mode.el
*** emacs-lisp/lisp-mode.el 20 Sep 2008 21:54:44 -0000 1.226
--- emacs-lisp/lisp-mode.el 21 Sep 2008 17:09:04 -0000
***************
*** 1027,1033 ****
;; where it begins, so find that one, instead.
(save-excursion
(goto-char calculate-lisp-indent-last-sexp)
! (while (and (not (looking-back "^[ \t]*"))
(or (not containing-sexp)
(< (1+ containing-sexp) (point))))
(forward-sexp -1)
--- 1027,1034 ----
;; where it begins, so find that one, instead.
(save-excursion
(goto-char calculate-lisp-indent-last-sexp)
! (backward-prefix-chars)
! (while (and (not (looking-back "^[ \t]*\\|([ \t]+"))
(or (not containing-sexp)
(< (1+ containing-sexp) (point))))
(forward-sexp -1)
--------------070203090003050805040103--
Markus Sauermann <markus <at> sauermann-consulting.de>:Emacs Bugs <bug-gnu-emacs <at> gnu.org>.
Full text available.bug-submit-list <at> lists.donarmstrong.com, Emacs Bugs <bug-gnu-emacs <at> gnu.org>:bug#1012; Package emacs.
Full text available.
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