unofficial mirror of bug-gnu-emacs@gnu.org 
 help / color / mirror / code / Atom feed
From: Drew Adams <drew.adams@oracle.com>
To: Andreas Schwab <schwab@suse.de>,
	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: Mon, 6 Feb 2023 16:43:32 +0000	[thread overview]
Message-ID: <SJ0PR10MB5488116FF14BD06CC3C6D35DF3DA9@SJ0PR10MB5488.namprd10.prod.outlook.com> (raw)
In-Reply-To: <mvm7cwvxhbf.fsf@suse.de>

> > S-exps are defined recursively.  ",X" is read syntax of a valid s-exp,
> > and I don't think we want to make the reader raise an error for it.
> 
> FWIW, clisp generates an error if the comma occurs outside of backquote.
> If you quote the comma, it is treated as an ordinary symbol character.
> 
> $ clisp -q -x ',X'
> *** - READ: comma is illegal outside of backquote
> $ clisp -q -x '\,X'
> *** - SYSTEM::READ-EVAL-PRINT: variable |,X| has no value
> 
> $ clisp -q -x '`\,X'
> |,X|

Thanks for that info, confirming what clisp does.
Those are all what I'd expect/hope: the \,x
inside the backquote sexp is read as the symbol
|,x|.

The Elisp question (bug) is really only about a
_bare_ escaped comma, not one that's immediately
followed by symbol chars (e.g. x).

E.g., what do these give?

$ clisp -q -x '`\,'
$ clisp -q -x '`(\, x)'





  reply	other threads:[~2023-02-06 16:43 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
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 [this message]
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=SJ0PR10MB5488116FF14BD06CC3C6D35DF3DA9@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 \
    --cc=schwab@suse.de \
    /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).