GNU bug report logs - #38545
comment-multi-line doesn't work in c-mode

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Christophe TROESTLER <Christophe.TROESTLER <at> umons.ac.be>
To: "bug-gnu-emacs <at> gnu.org" <bug-gnu-emacs <at> gnu.org>
Subject: 26.1; comment-multi-line doesn't work
Date: Mon, 9 Dec 2019 12:27:45 +0000

Setting comment-multi-line to `t', commenting a region should “inserts no new terminator or starter.”  However, it is not the case.  For example, selecting two lines in

    int main() 
    {
      int a;
      int b;
      return(0);
    }
    
    /* Local Variables: */
    /* comment-style: multi-line */
    /* comment-multi-line: t */
    /* End: */

yields

      /* int a;
       * int b; */

while it should be

      /* int a;
         int b; */

Best,
C.


In GNU Emacs 26.1 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.11)
 of 2019-09-09, modified by Debian built on x86-ubc-02
Windowing system distributor 'The X.Org Foundation', version 11.0.12004000
System Description:	Debian GNU/Linux bullseye/sid

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<#secure method=smime mode=sign>

Message #8 received at 38545 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Christophe TROESTLER <Christophe.TROESTLER <at> umons.ac.be>
Cc: 38545 <at> debbugs.gnu.org
Subject: Re: bug#38545: 26.1; comment-multi-line doesn't work in c-mode
Date: Fri, 30 Oct 2020 16:33:01 +0100

Christophe TROESTLER <Christophe.TROESTLER <at> umons.ac.be> writes:

> Setting comment-multi-line to `t', commenting a region should “inserts no new terminator or starter.”  However, it is not the case.  For example, selecting two lines in
>
>     int main() 
>     {
>       int a;
>       int b;
>       return(0);
>     }
>
>     /* Local Variables: */
>     /* comment-style: multi-line */
>     /* comment-multi-line: t */
>     /* End: */
>
> yields
>
>       /* int a;
>        * int b; */
>
> while it should be
>
>       /* int a;
>          int b; */

I've stared at that for a while, and I can't see that comment-region has
inserted a new "terminator or starter".  It's inserted a "*" at the
start of the second line, but that's neither of those things.

So I think it's behaving as documented?

However, poking around for two minutes doesn't reveal any obvious way to
get c-mode to stop behaving like this; for instance, setting
comment-continue to something else than what it is just makes it create
single-line comments, confusingly enough.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

Message #13 received at 38545 <at> debbugs.gnu.org (full text, mbox):

From: Andreas Schwab <schwab <at> linux-m68k.org>
To: Christophe TROESTLER <Christophe.TROESTLER <at> umons.ac.be>
Cc: 38545 <at> debbugs.gnu.org
Subject: Re: bug#38545: 26.1; comment-multi-line doesn't work
Date: Fri, 30 Oct 2020 17:17:35 +0100

On Dez 09 2019, Christophe TROESTLER wrote:

> Setting comment-multi-line to `t', commenting a region should “inserts no new terminator or starter.”  However, it is not the case.  For example, selecting two lines in
>
>     int main() 
>     {
>       int a;
>       int b;
>       return(0);
>     }
>     
>     /* Local Variables: */
>     /* comment-style: multi-line */
>     /* comment-multi-line: t */
>     /* End: */
>
> yields
>
>       /* int a;
>        * int b; */
>
> while it should be
>
>       /* int a;
>          int b; */

What's your value of comment-continue?

Andreas.

-- 
Andreas Schwab, schwab <at> linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
"And now for something completely different."

Message #16 received at 38545 <at> debbugs.gnu.org (full text, mbox):

From: Christophe Troestler <christophe.troestler <at> umons.ac.be>
To: 38545 <at> debbugs.gnu.org
Subject: comment-multi-line doesn't work in c-mode
Date: Sun, 22 Aug 2021 23:28:53 +0200

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

My value of `comment-continue' is `nil'.

Message #19 received at 38545 <at> debbugs.gnu.org (full text, mbox):

From: Christophe Troestler <christophe.troestler <at> umons.ac.be>
To: 38545 <at> debbugs.gnu.org
Cc: Andreas Schwab <schwab <at> linux-m68k.org>
Subject: comment-multi-line doesn't work in c-mode
Date: Wed, 25 Aug 2021 11:04:49 +0200

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

The problem with setting comment-continue to a value only made of spaces has been fixed: <http://git.savannah.gnu.org/cgit/emacs.git/commit/?id=5c93063129de0a2005aac1ffe1c48c372b918634>
I think this can be closed.

Message #22 received at 38545 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Christophe Troestler <christophe.troestler <at> umons.ac.be>
Cc: 38545 <at> debbugs.gnu.org, Andreas Schwab <schwab <at> linux-m68k.org>
Subject: Re: bug#38545: comment-multi-line doesn't work in c-mode
Date: Wed, 25 Aug 2021 13:12:56 +0200

Christophe Troestler <christophe.troestler <at> umons.ac.be> writes:

> The problem with setting comment-continue to a value only made of
> spaces has been fixed:
> <http://git.savannah.gnu.org/cgit/emacs.git/commit/?id=5c93063129de0a2005aac1ffe1c48c372b918634>
> I think this can be closed.

OK; closing.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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