From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Alan Mackenzie <acm@muc.de>
Cc: bug-cc-mode@gnu.org, Peter Dyballa <Peter_Dyballa@Web.DE>,
Martin Stjernholm <mast@lysator.liu.se>,
emacs-devel@gnu.org
Subject: Re: Old-style backquotes in cc-vars.el
Date: Sat, 06 Oct 2007 18:27:00 -0400 [thread overview]
Message-ID: <jwv8x6fanwp.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <20071006163101.GA2565@muc.de> (Alan Mackenzie's message of "Sat\, 6 Oct 2007 16\:31\:01 +0000")
>> cc-vars uses a mix of old-style a new-style backquotes.
> I don't think it does.
The warning indicates that Emacs sees old-style backquotes, aqnd I'm pretty
sure there are new style backquotes as well, so I'm pretty sure you're wrong.
> He wouldn't knowingly have put in old-style BQs as late as 2001.
Maybe he did it knowingly: he's using nested backquotes and IIRC they didn't
always work correctly in older versions of Emacs when used with new-style
backquotes. Actually IIRC the problem was with nested new-style commas
(where the second would not be recognized as new-style) which indeed do
appear in that code.
> I'm not sure whether the rules for nested backquotes are clearly laid
> out anywhere.
The problem is not about nesting but about new-style vs old-style: the
detailed rule about which is which is indeed only specified implicitly in
the source code.
> I think they're formally ambiguous (i.e., RTFS). I tried
> replacing "`(` (radio" with both
> "`( (` (radio" (explicitly putting in an "old-style" BQ)
> , and
> "`` (radio" (replacing the alleged "old-style" BQ with a
> "new-style" one)
> , but each of these generated results different from the original
> (checked with macroexpand).
You need to fix the ,(, part accordingly.
> So would I. ;-(
Thien-Thi might be a good start.
> Who is the bytecomp expert, again? Could we possibly ask him about the
> semantics of `(` (radio ?
It's (\` (\` (radio
> Possibly, the analysis in lread.c needs to be done more rigorously.
I have no idea what that means.
Stefan
next prev parent reply other threads:[~2007-10-06 22:27 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-23 20:51 Old-style backquotes in cc-vars.el Stefan Monnier
2007-09-01 10:18 ` Alan Mackenzie
2007-09-03 20:46 ` Stefan Monnier
2007-09-04 3:14 ` T. V. Raman
2007-09-04 22:57 ` Richard Stallman
2007-09-05 2:21 ` T. V. Raman
2007-09-05 2:44 ` dhruva
2007-09-05 3:26 ` Stefan Monnier
2007-09-05 20:02 ` Richard Stallman
2007-09-06 14:27 ` Juri Linkov
2007-09-07 6:32 ` Richard Stallman
2007-09-05 13:29 ` T. V. Raman
2007-10-06 16:31 ` Alan Mackenzie
2007-10-06 18:31 ` Thien-Thi Nguyen
2007-10-06 20:51 ` Alan Mackenzie
2007-10-06 21:46 ` Thien-Thi Nguyen
2007-10-11 17:41 ` Davis Herring
2007-10-19 7:29 ` Thien-Thi Nguyen
2007-10-06 22:27 ` Stefan Monnier [this message]
2007-10-07 9:40 ` Alan Mackenzie
2007-10-07 9:41 ` Thien-Thi Nguyen
2007-10-07 19:40 ` Eli Zaretskii
2007-10-07 13:10 ` Richard Stallman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=jwv8x6fanwp.fsf-monnier+emacs@gnu.org \
--to=monnier@iro.umontreal.ca \
--cc=Peter_Dyballa@Web.DE \
--cc=acm@muc.de \
--cc=bug-cc-mode@gnu.org \
--cc=emacs-devel@gnu.org \
--cc=mast@lysator.liu.se \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.