From: "Drew Adams" <drew.adams@oracle.com>
To: "'Andreas Schwab'" <schwab@linux-m68k.org>
Cc: 'Chong Yidong' <cyd@stupidchicken.com>,
6591@debbugs.gnu.org, 'Richard Stallman' <rms@gnu.org>
Subject: bug#6591: 24.0.50; incorrect doc for `catch'
Date: Sun, 11 Jul 2010 12:10:38 -0700 [thread overview]
Message-ID: <18EB402ADCE24992BF75AD91D64983FD@us.oracle.com> (raw)
In-Reply-To: <m2hbk5997y.fsf@igel.home>
> > No better alternative? Did you read the thread? What
> > about doing what the rest of the world does: (catch TAG FORM...)?
>
> Just because you spell the body form does not make it any different
> form. The ellipses is already unambigous.
Please read the thread. Ellipsis commonly means that whatever it follows can be
repeated. The body is not repeated.
[Ditto for `*' (same as `...').
Common Lisp writes this as (catch TAG {FORM}*), which is clear.]
This convention for `...', no matter how common, should also be stated in the
docs, of course. I gave the Oracle docs as an example, and this convention is
clearly spelled out there.
> > What does "BODY forms" refer to: (1) a set of BODYs, each
> > of which is a Lisp form, or (2) the set of Lisp forms that
> > comprise a BODY. The term "BODY forms" is ambiguous. It
> > can mean the forms that make up BODY or a list of forms each
> > of which is a BODY.
>
> This is _not_ a list,
What is not a list - what is "this"?
> it is a repeated argument,
Bzzzzt! No, sorry, but thanks for playing. What argument is repeated? BODY?
Eli says no. What is repeated (repeatable) is the FORM that actually is an
argument (and which does not appear in the syntax description). `BODY...' is
not an argument (according to Eli). BODY is not an argument (according to Eli).
BODY cannot be repeated (according to Eli). [Where "according to Eli" means my
understanding of what he wrote.]
> not matter how you name the parameter.
What parameter? BODY is not an (ordinary) parameter.
`BODY...' is not a parameter.
BODY would be a &rest parameter, if we expressed it that way (which I suggested
as one possibility). Other than that, it is _not_ an ordinary parameter.
[MacLisp writes (*catch TAGSPEC . BODY), which is clear, even if not
conventional outside the Lisp world.]
But in (catch TAG BODY...) BODY is not a placeholder, and `...' does not mean
repetition of BODY. Instead, `BODY...' is a single token standing for a list of
forms that is spliced in to produce an implicit `progn'.
So "it is a repeated argument, no matter how you name the parameter" is wrong on
at least two counts.
> If it were a list it would be a single parameter.
See above.
next prev parent reply other threads:[~2010-07-11 19:10 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-09 15:52 bug#6591: 24.0.50; incorrect doc for `catch' Drew Adams
2010-07-09 17:48 ` Eli Zaretskii
2010-07-09 19:36 ` Drew Adams
2010-07-10 7:48 ` Eli Zaretskii
2010-07-10 14:14 ` Drew Adams
2010-07-10 14:38 ` Eli Zaretskii
2010-07-10 15:44 ` Drew Adams
2010-07-10 15:55 ` Eli Zaretskii
2010-07-11 4:21 ` Drew Adams
2010-07-11 6:15 ` Eli Zaretskii
2010-07-11 8:14 ` Štěpán Němec
2010-07-11 9:22 ` Eli Zaretskii
2010-07-11 10:59 ` Štěpán Němec
2010-07-11 13:23 ` Eli Zaretskii
2010-07-11 13:44 ` Štěpán Němec
2010-07-11 14:00 ` Eli Zaretskii
2010-07-11 15:26 ` Andreas Schwab
2010-07-11 15:33 ` Drew Adams
2010-07-11 17:22 ` Eli Zaretskii
[not found] ` <mailman.11.1278862210.6344.bug-gnu-emacs@gnu.org>
2010-07-11 22:36 ` Tim X
[not found] ` <mailman.2.1278856813.6344.bug-gnu-emacs@gnu.org>
2010-07-11 22:34 ` Tim X
2010-12-08 15:52 ` Drew Adams
2010-12-20 12:25 ` Chong Yidong
2010-07-11 15:33 ` Drew Adams
2010-07-11 17:25 ` Eli Zaretskii
2010-07-11 16:33 ` Chong Yidong
2010-07-11 16:52 ` Drew Adams
2010-07-11 17:13 ` Chong Yidong
2010-07-11 17:58 ` Drew Adams
2010-07-11 18:14 ` Andreas Schwab
2010-07-11 19:10 ` Drew Adams [this message]
2010-07-11 19:40 ` Andreas Schwab
2010-07-11 20:07 ` Drew Adams
2010-07-11 21:22 ` Andreas Schwab
2010-07-11 21:42 ` Chong Yidong
2010-07-11 21:44 ` Drew Adams
2010-07-12 8:43 ` Andreas Schwab
2010-07-12 14:56 ` Drew Adams
2010-07-12 15:26 ` Andreas Schwab
2010-07-12 16:01 ` Drew Adams
2010-07-12 16:11 ` Andreas Schwab
2010-07-12 16:31 ` Drew Adams
2010-07-12 16:36 ` Andreas Schwab
2010-07-12 16:50 ` Drew Adams
2010-07-12 18:14 ` Andreas Schwab
2010-07-12 18:35 ` Drew Adams
2010-07-12 18:41 ` Andreas Schwab
2010-07-12 18:49 ` Drew Adams
2010-07-12 17:02 ` Eli Zaretskii
2010-07-12 18:30 ` Drew Adams
2010-07-10 5:44 ` MON KEY
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=18EB402ADCE24992BF75AD91D64983FD@us.oracle.com \
--to=drew.adams@oracle.com \
--cc=6591@debbugs.gnu.org \
--cc=cyd@stupidchicken.com \
--cc=rms@gnu.org \
--cc=schwab@linux-m68k.org \
/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.