bug#70435: 30.0.50; cc-mode: <> are sometimes not reconized as parentheses

[Alan Mackenzie]

Hello, Eli and Géza.

On Thu, May 02, 2024 at 12:30:32 +0300, Eli Zaretskii wrote:
> > From: Herman, Géza <geza.herman@gmail.com>
> > Cc: Herman Géza <geza.herman@gmail.com>,
> >  70435@debbugs.gnu.org, Eli
> >  Zaretskii <eliz@gnu.org>
> > Date: Mon, 29 Apr 2024 19:21:01 +0200


> > Hello Alan,

> > Alan Mackenzie <acm@muc.de> writes:

> > > I have a fix, I think.  It is actually a two line fix, removing 
> > > a test
> > > from the top of a function, but it involves reindenting the 
> > > entire rest
> > > of the function.

> > > Please apply the patch below, recompile cc-engine.el, then load 
> > > the
> > > resulting CC Mode into a running Emacs.  Please test it on your 
> > > real C++
> > > code, and let me know if the bug is actually fixed.  Thanks!

> > I can confirm that the patch fixes the issue, I tested it in real 
> > circumstances.

> > Thanks for fixing the problem so quickly!

> Alan, should this bug be closed now?

Apologies for my dithering.  I've been having second thoughts about the
patch in the last few days, and wondering whether I should refine it.

It's all to do with a function c-unmark-<>-around-region, which was run
in before-change-functions for a deletion, and after-change-functions for
an insertion.  The patch I sent to Géza made that function run in before-
and after-c-f both for insertions and deletions.

I've been wondering whether that is strictly necessary, since it will
slow down CC Mode a little.  I'm thinking that in the
insertion/before-c-f case, I might not need the call.

Géza, would you be prepared to do a little more testing if I modified the
patch?

-- 
Alan Mackenzie (Nuremberg, Germany).