From: Drew Adams <drew.adams@oracle.com>
To: Michael Heerdegen <michael_heerdegen@web.de>
Cc: Xie Shynur <one.last.kiss@outlook.com>,
"61281@debbugs.gnu.org" <61281@debbugs.gnu.org>
Subject: bug#61281: “`(a \, b)” equals to “`(a . , b)”
Date: Sun, 5 Feb 2023 15:53:58 +0000 [thread overview]
Message-ID: <SJ0PR10MB5488652C2957D7B8121EE7E7F3D59@SJ0PR10MB5488.namprd10.prod.outlook.com> (raw)
In-Reply-To: <871qn4hfte.fsf@web.de>
> > No evaluation by backquote, you mean? Yes, you need
> > to say `(a ,'\, b).
> > Is this really different in other Lisps (isn't `,' a
> > reader macro in Common Lisp)?
I think I spoke to this in my previous msg
today. Let me know, if you think not.
> I mean, what should the Elisp reader return
> when reading ",foo"?
Dunno. (read ",foo") and (read ", foo" return
(\, foo). Why? (Just because the current
implementation of backquote depends on that?)
(read "'foo") returns just 'foo - it doesn't
return (quote foo). (read "`foo") returns
`foo, not (backquote foo). (read "`,foo")
returns `,foo. And (read "\\,foo") returns
\,foo.
Maybe (read ",foo") should rather return
",foo" - but of course the Lisp reader would
need to behave accordingly. And maybe
(read ", foo") should return ",".
> It must be some expression, and backquote
> will have to handle this expression differently
> than quote for the thing to work.
See above.
Notice the error msg from (eval ',foo):
Debugger entered--Lisp error: (void-function \,)
,foo
eval(,foo)
(progn (eval ',foo))
Nothing in (normal) Lisp syntax shows the use
of comma as a function. ,foo doesn't look
like function-call syntax, does it?
And here's the error from either (read ",")
or (eval (read ",")):
End of file during parsing
Yes, an error should be reported in each case,
but I think it should just say that comma is
undefined outside of backquote.
next prev parent reply other threads:[~2023-02-05 15:53 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-04 23:23 bug#61281: “`(a \, b)” equals to “`(a . , b)” Xie Shynur
2023-02-04 23:34 ` Drew Adams
2023-02-04 23:43 ` Drew Adams
2023-02-05 0:28 ` Michael Heerdegen
2023-02-05 3:30 ` Drew Adams
2023-02-05 4:32 ` Michael Heerdegen
2023-02-05 4:55 ` Michael Heerdegen
2023-02-05 15:53 ` Drew Adams [this message]
2023-02-05 23:56 ` Michael Heerdegen
2023-02-06 2:26 ` Drew Adams
2023-02-06 3:03 ` Michael Heerdegen
2023-02-06 3:49 ` Drew Adams
2023-02-06 10:49 ` Ihor Radchenko
2023-02-06 16:46 ` Drew Adams
2023-02-07 1:07 ` Michael Heerdegen
2023-02-07 1:40 ` Michael Heerdegen
2023-02-07 11:50 ` bug#61281: Double backquote expansion and ", " (was: bug#61281: “`(a \, b)” equals to “`(a . , b)”) Ihor Radchenko
2023-02-07 23:33 ` bug#61281: Double backquote expansion and ", " Michael Heerdegen
2023-02-06 9:40 ` bug#61281: “`(a \, b)” equals to “`(a . , b)” Andreas Schwab
2023-02-06 16:43 ` Drew Adams
2023-02-07 8:56 ` Andreas Schwab
2023-02-07 18:00 ` Drew Adams
2023-02-07 23:44 ` Michael Heerdegen
2023-02-08 3:09 ` Drew Adams
2023-02-08 9:06 ` Andreas Schwab
2023-02-09 1:29 ` Michael Heerdegen
2023-02-09 2:04 ` Drew Adams
2023-02-09 2:15 ` Michael Heerdegen
2023-02-08 9:12 ` Andreas Schwab
2023-02-05 6:32 ` Jim Porter
2023-02-06 0:13 ` Michael Heerdegen
2023-02-06 0:18 ` Michael Heerdegen
2023-02-06 1:14 ` Jim Porter
2023-02-05 15:48 ` Drew Adams
2023-02-05 23:17 ` Michael Heerdegen
2023-02-06 1:49 ` Drew Adams
2023-02-06 4:11 ` Michael Heerdegen
2023-02-06 5:01 ` Drew Adams
2023-02-06 5:22 ` Drew Adams
2023-02-06 5:25 ` Michael Heerdegen
2023-02-06 16:43 ` Drew Adams
2023-02-07 2:00 ` Michael Heerdegen
2023-02-07 18:00 ` Drew Adams
2023-02-07 23:36 ` Michael Heerdegen
2023-02-08 3:09 ` Drew Adams
2023-02-09 1:37 ` Michael Heerdegen
2023-02-09 2:10 ` Drew Adams
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
List information: https://www.gnu.org/software/emacs/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=SJ0PR10MB5488652C2957D7B8121EE7E7F3D59@SJ0PR10MB5488.namprd10.prod.outlook.com \
--to=drew.adams@oracle.com \
--cc=61281@debbugs.gnu.org \
--cc=michael_heerdegen@web.de \
--cc=one.last.kiss@outlook.com \
/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 public inbox
https://git.savannah.gnu.org/cgit/emacs.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).