From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.bugs Subject: bug#7146: (make-symbol "") issues Date: Sat, 16 Jul 2011 23:16:02 -0400 Message-ID: References: <4CA6B2BE.7070705@gmail.com> <4CA7D1E3.90800@gmail.com> <87k4m0giy4.fsf@stupidchicken.com> <4CA7FC00.5080905@gmail.com> <87fwwn3opr.fsf@stupidchicken.com> <87bp7bfu3c.fsf@gnu.org> <87iq1jfhre.fsf@stupidchicken.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: dough.gmane.org 1310872647 21314 80.91.229.12 (17 Jul 2011 03:17:27 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Sun, 17 Jul 2011 03:17:27 +0000 (UTC) Cc: 7146@debbugs.gnu.org, Frank , Lars Magne Ingebrigtsen , Chong Yidong To: Andreas Schwab Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Jul 17 05:17:22 2011 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([140.186.70.17]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1QiHr7-0003oS-Ud for geb-bug-gnu-emacs@m.gmane.org; Sun, 17 Jul 2011 05:17:22 +0200 Original-Received: from localhost ([::1]:54667 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QiHr6-0002nL-Qd for geb-bug-gnu-emacs@m.gmane.org; Sat, 16 Jul 2011 23:17:21 -0400 Original-Received: from eggs.gnu.org ([140.186.70.92]:55014) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QiHqq-0002n6-FI for bug-gnu-emacs@gnu.org; Sat, 16 Jul 2011 23:17:05 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QiHqp-0006Pl-A0 for bug-gnu-emacs@gnu.org; Sat, 16 Jul 2011 23:17:04 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:50771) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QiHqp-0006Ph-3y for bug-gnu-emacs@gnu.org; Sat, 16 Jul 2011 23:17:03 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.69) (envelope-from ) id 1QiHqo-0003vQ-Ed; Sat, 16 Jul 2011 23:17:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-To: owner@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 17 Jul 2011 03:17:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 7146 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 7146-submit@debbugs.gnu.org id=B7146.131087257015024 (code B ref 7146); Sun, 17 Jul 2011 03:17:02 +0000 Original-Received: (at 7146) by debbugs.gnu.org; 17 Jul 2011 03:16:10 +0000 Original-Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1QiHpy-0003uH-8r for submit@debbugs.gnu.org; Sat, 16 Jul 2011 23:16:10 -0400 Original-Received: from ironport2-out.teksavvy.com ([206.248.154.183] helo=ironport2-out.pppoe.ca) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1QiHpx-0003u3-05 for 7146@debbugs.gnu.org; Sat, 16 Jul 2011 23:16:09 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Av0EAFxTIk5MCqt8/2dsb2JhbABSp3V4iHzBAYY8BJ8nhDA X-IronPort-AV: E=Sophos;i="4.67,215,1309752000"; d="scan'208";a="126241345" Original-Received: from 76-10-171-124.dsl.teksavvy.com (HELO ceviche.home) ([76.10.171.124]) by ironport2-out.pppoe.ca with ESMTP/TLS/ADH-AES256-SHA; 16 Jul 2011 23:16:02 -0400 Original-Received: by ceviche.home (Postfix, from userid 20848) id 65308660D5; Sat, 16 Jul 2011 23:16:02 -0400 (EDT) In-Reply-To: (Andreas Schwab's message of "Thu, 14 Jul 2011 18:24:13 +0200") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list Resent-Date: Sat, 16 Jul 2011 23:17:02 -0400 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:49316 Archived-At: >> Even though this is obscure, this is a bug that can crash (some builds >> of) Emacs. So I rather think this should be fixed. Was any work done >> towards adding a printed representation of empty-string symbols? > What would be a good mnemonic? We need two different representations > (interned and uninterned), perhaps ## and #= ? "#:" is the obvious choice for the uninterned representation. It already works for printing, but is not understood by the reader. CommonLisp has a |....| syntax for interned symbols which trivially allows empty symbols, and some Scheme iumplementations adopted it as well, although R6RS didn't (it did add a \xNNNN notation which allows for non-ASCII chars, but it doesn't seem to include a notation for empty symbols). Stefan