bug#80267: CC Mode 5.35.2 (C/*l); C mode comment in signature indentation regression

[Alan M. <ac...@mu...>]

Hello, Arsen.

On Thu, Jan 29, 2026 at 15:21:31 +0100, Arsen Arsenović wrote:
> Hi Alan,

> Alan Mackenzie <ac...@mu...> writes:

> > Here's a patch which should fix it.  It tidies up other aspects of the
> > "leading comment" handling, too.  Please try it out and let me know
> > how well it works.  Thanks!

> It does appear to work, though I found it slightly unintuitive at first
> that line X+1 affects indent at line X, I understand why, so I think
> this is fine.  Thank you so much!

Does it?  I don't think L X+1 does affect L X.  Maybe there's something
coincidental in some test cases.

I've committed the patch to CC Mode, thanks.

> It may be wise to drop in some tests of both leading and non-leading
> comments.  This should prevent future regressions.

I've added a new test case to the CC Mode test suite which tests these
things.  It's called comments-12.c, and looks like this:

#########################################################################
int foobar (int a,
  /* bar */ int b,
            /* foo */
            int c);

int foobar (
	    /* foo */
  /* bar */ int a,
    /* b */ int b,
	    int c);

/* Local Variables: */
/* c-file-offsets: ((arglist-intro . c-lineup-arglist-intro-after-paren)) */
/* End: */
#########################################################################

> > Incidentally, I am no longer part of the Emacs project, so I don't
> > commit changes there any more.  The patch is based on the CC Mode
> > repository head at https://hg.savannah.nongnu.org/hgweb/cc-mode, which
> > can be cloned from that address with $ hg clone.  It should work, more
> > or less, on the Emacs repository too.

> That is unfortunate.  I didn't quite follow the thread where you
> announced the departure (sorry, I'm sure you can understand, I'm quite
> busy still..).

> That is a massive loss for Emacs.  Hopefully they at least pull CC-mode
> changes.

Somebody will need persuading to do this.

> Thank you once again, have a lovely day!

And yourself, too!

> -- 
> Arsen Arsenović

-- 
Alan Mackenzie (Nuremberg, Germany).