Re: Emacs 22.2 release plans - request for a slight delay.

[Alan Mackenzie]

Hi,!

On Thu, Mar 06, 2008 at 06:19:54PM -0500, Chong Yidong wrote:

> > I'm asking for a slight delay (perhaps over the weekend?) to fix a
> > serious bug in C mode, namely:

> >     Visit lisp.h, go to the end of the buffer, and do
> >     M-x RET c-beginning-of-defun RET

> > This is horrendously slow (~30 seconds).

> > I've just had a look at c-beginning-of-defun, and I've narrowed the
> > fault down to `c-in-knr-argdecl', where the code laboriously trundles
> > back one paren pair at a time until it finds a "}" (or BOB).  This is
> > clearly suboptimal in a region with several hundred consecutive
> > declarations without brace-blocks.  There are ~900 consecutive
> > paren-pairs in the tail of lisp.h.

> > So perhaps if I put the limit at 32, this will be safe for any
> > function not appearing in the Obfuscated C competition or
> > deliberately written to break editors.  :-)

> > This will probably be a "quick and easy" change, taking, perhaps, an
> > hour.  However, it's probably worth while doing it calmly and carefully.
> > ;-)

> [Alan later sent a patch to me off-list.]

> First off, could you check the patch into the trunk?  Thanks.

Done, including a patch to cc-mode.texi.

-- 
Alan Mackenzie (Nuremberg, Germany).