From: Bruce Korb <bkorb@gnu.org>
To: Alan Mackenzie <acm@muc.de>, 20778@debbugs.gnu.org
Subject: bug#20778: Flush left indentation in c-mode
Date: Fri, 12 Jun 2015 07:55:37 -0700 [thread overview]
Message-ID: <557AF2E9.3@gnu.org> (raw)
In-Reply-To: <20150610110034.44777.qmail@mail.muc.de>
On 06/10/15 04:00, Alan Mackenzie wrote:
>> With the patched cc-mode, I ran into this situation again.
>
> Er, any chance of a reference to "this situation"?
"see below" :)
>> I do not know what you can do about it without better information from me,
>> but I don't know what to tell you either. :( Oh, the "c-file-style" is "linux".
>
> OK, standard information, please:
> (i) The Emacs version number (M-x emacs-version).
> $ emacs --version
> GNU Emacs 24.3.1
> Copyright (C) 2013 Free Software Foundation, Inc.
> (ii) The CC Mode version (M-x c-version).
> $ ls -l ~/.emacs.d|fgrep cc-mode
> drwxr-xr-x 2 bkorb dev 4096 May 11 13:31 cc-mode
> -rw-r----- 1 bkorb dev 580925 May 7 17:19 cc-mode-5.32.5.tar.gz
5.32.5, but patched:
> --- cc-cmds.el 2013-05-03 10:11:16.000000000 -0700
> +++ ../cc-mode/cc-cmds.el 2015-05-11 13:31:16.758777535 -0700
> @@ -937,15 +937,8 @@
> ;; do all cleanups and newline insertions if c-auto-newline is on.
> (if (or (not c-auto-newline)
> (not (looking-at "[ \t]*\\\\?$")))
> - (when c-syntactic-indentation
> - (let ((syntax (c-guess-basic-syntax)))
> - (c-indent-line syntax)
> - ;; Guard against the C hacker inserting a statement before a
> - ;; non-compound statement in an if/while/for.
> - (if (eq (caar syntax) 'substatement)
> - (save-excursion
> - (if (eq 0 (forward-line))
> - (c-indent-line))))))
> + (if c-syntactic-indentation
> + (c-indent-line))
> ;; clean ups: list-close-comma or defun-close-semi
> (let ((pos (- (point-max) (point))))
> (if (c-save-buffer-state ()
> (iii) Have you got any CC Mode customisations in your .emacs? You've
> already said you're in style "linux", but is there anything else? If
> so, what?
Not much:
> $ cat .dir-locals.el
>
> (
> (nil . ((indent-tabs-mode . t)
> (tab-width . 8)
> (show-trailing-whitespace . t)
> (fill-column . 132)))
>
> (c-mode . ((c-file-style . "linux")))
> )
> (iii) The EXACT steps you took between starting Emacs to seeing the error,
> detailed enough that I can reproduce it.
If I knew the answer to that, I would have included that. :(
I work for hours and then suddenly this happens.
The mechanism for clearing it requires closing and re-visiting the file
in question. I do not have to restart emacs. Changing to another
mode and changing back to C-mode is not effective (i.e. the problem
persists).
> (iv) What exactly do you mean "It seems to think that the flush-left
> alignment ... is fine"? What command did you give that led you to this
> conclusion, or what output from CC Mode was relevant?
I put the cursor on the flush-left "if" line and press <tab> to no effect.
I re-indent the region, to no effect. I switch to "text-mode" and back
and re-indent the region, to no effect. I close and re-visit the file
and indent-region now works correctly, as you see for yourself when
you tried re-indenting the region. The only way I can think of
to resolve this is if there is some information I can dump out
about the buffer the next time it happens. Obviously, I have to close
and re-visit the file fairly soon, as this is my day job....
> Just for info, when I loaded the following fragment into Emacs, stripped
> of the leading "> " from each line, set the style "linux", then indented
> it .... I can't
> reproduce the problem at the moment.
It is not the particular code fragment, but the editing history
that seems to trigger the problem. I have trouble remembering
all the 100's to 1000's of keystrokes I went through to cause it. ;)
next prev parent reply other threads:[~2015-06-12 14:55 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-09 16:49 bug#20778: Flush left indentation in c-mode Bruce Korb
[not found] ` <mailman.4701.1433868613.904.bug-gnu-emacs@gnu.org>
2015-06-10 11:00 ` Alan Mackenzie
2015-06-12 14:55 ` Bruce Korb [this message]
2015-06-26 21:24 ` Bruce Korb
2021-08-16 13:05 ` Lars Ingebrigtsen
2021-09-14 10:54 ` Lars Ingebrigtsen
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