From: Alan Mackenzie <acm@muc.de>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: Eli Zaretskii <eliz@gnu.org>, yu jie <yujie052@gmail.com>,
emacs-devel@gnu.org
Subject: Re: ntemacs hangs when openning the attached file
Date: Sat, 24 May 2008 13:16:36 +0000 [thread overview]
Message-ID: <20080524131636.GA3025@muc.de> (raw)
In-Reply-To: <jwvfxs8zp6l.fsf-monnier+emacs@gnu.org>
Hi, Stefan!
On Fri, May 23, 2008 at 05:36:34PM -0400, Stefan Monnier wrote:
> > The problem was that c-neutralize-syntax-in-CPP was inefficiently
> > coded. I've optimised it using essentially only Emacs primitives in
> > the defun's main loop. It now runs almost 2 orders of magnitude
> > faster.
> Sounds good.
> > Eli, I'd appreciate it very much indeed if you could review this new
> > code, please - earlier versions of it were peculiarly troublesome.
> Don't know about Eli.
That's OK. You'll do instead. ;-) (Thanks!)
> But here's some comments:
> > + ;; Note: SPEED _MATTERS_ IN THIS FUNCTION!!!
> > + ;;
> > ;; This function might do invisible changes.
> ^^
> make
I hereby resign from my role as project linguistic pedant. ;-) That one
(and ~100 others) have been in the source for ~5 years, put there by
Martin. How could I miss this??
> > + (setq pps-position beg pps-state nil)
> It would be a lot more lispy to explicitly let-bind pps-position and
> pps-state here, rather than declare them earlier without initializing
> them and then initializing them here.
I'd thought that that would just be an unnecessary extra `let'. However,
having tried it, it does make the code a bit clearer. So yes, thank you
- I'll be doing this more in the future.
> > (while (and (< (point) end)
> > (search-forward-regexp c-anchored-cpp-prefix end t))
> > ;; If we've found a "#" inside a string/comment, ignore it.
> > ! (setq pps-state
> > ! (parse-partial-sexp pps-position (point) nil nil pps-state)
> > ! pps-position (point))
> > ! (unless (or (nth 3 pps-state) ; in a string?
> > ! (nth 4 pps-state)) ; in a comment?
> > (setq mbeg+1 (point))
> > (c-end-of-macro) ; Do we need to go forward 1 char here? No!
> > ! (c-neutralize-CPP-line mbeg+1 (point))
> > ! (setq pps-state
> > ! (parse-partial-sexp pps-position (point) nil nil pps-state)
> > ! pps-position (point))))))
> I have the impression that this second call to parse-partial-sexp is
> unnecessary.
DUH!!! Of course! Wake up, Alan! That's the whole point of the call to
`c-neutralize-CPP-line', just above. Thanks!
> Stefan
--
Alan Mackenzie (Nuremberg, Germany).
next prev parent reply other threads:[~2008-05-24 13:16 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <42b562540805062101s3e79eecel5ddc5b19821deda2@mail.gmail.com>
2008-05-07 8:48 ` ntemacs hangs when openning the attached file Eli Zaretskii
2008-05-20 16:13 ` Alan Mackenzie
2008-05-22 4:42 ` Stefan Monnier
2008-05-23 21:01 ` Alan Mackenzie
2008-05-23 21:36 ` Stefan Monnier
2008-05-24 13:16 ` Alan Mackenzie [this message]
2008-05-24 8:18 ` Eli Zaretskii
2008-05-24 13:17 ` Alan Mackenzie
2008-05-07 17:34 ` Richard M Stallman
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