From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Michael Heerdegen Newsgroups: gmane.emacs.bugs Subject: bug#13422: 24.2.91; Feature request: Add a macro always expanding to nil Date: Sun, 13 Jan 2013 03:36:57 +0100 Message-ID: <87zk0dx0za.fsf@web.de> References: <87ip72jnbr.fsf@web.de> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1358044616 869 80.91.229.3 (13 Jan 2013 02:36:56 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 13 Jan 2013 02:36:56 +0000 (UTC) Cc: 13422@debbugs.gnu.org To: Stefan Monnier Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Jan 13 03:37:14 2013 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1TuDRh-0005Os-Ll for geb-bug-gnu-emacs@m.gmane.org; Sun, 13 Jan 2013 03:37:13 +0100 Original-Received: from localhost ([::1]:40955 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TuDRR-0004l1-FH for geb-bug-gnu-emacs@m.gmane.org; Sat, 12 Jan 2013 21:36:57 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:42388) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TuDRL-0004kg-GY for bug-gnu-emacs@gnu.org; Sat, 12 Jan 2013 21:36:55 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TuDRG-0007Dr-QA for bug-gnu-emacs@gnu.org; Sat, 12 Jan 2013 21:36:51 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:51968) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TuDRG-0007Dh-Ma for bug-gnu-emacs@gnu.org; Sat, 12 Jan 2013 21:36:46 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.72) (envelope-from ) id 1TuDRV-0000hW-NX for bug-gnu-emacs@gnu.org; Sat, 12 Jan 2013 21:37:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Michael Heerdegen Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 13 Jan 2013 02:37:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 13422 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 13422-submit@debbugs.gnu.org id=B13422.13580445682628 (code B ref 13422); Sun, 13 Jan 2013 02:37:01 +0000 Original-Received: (at 13422) by debbugs.gnu.org; 13 Jan 2013 02:36:08 +0000 Original-Received: from localhost ([127.0.0.1]:57432 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1TuDQd-0000gK-Ao for submit@debbugs.gnu.org; Sat, 12 Jan 2013 21:36:08 -0500 Original-Received: from mout.web.de ([212.227.17.11]:50616) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1TuDQb-0000fg-9U for 13422@debbugs.gnu.org; Sat, 12 Jan 2013 21:36:06 -0500 Original-Received: from drachen.dragon ([89.204.154.121]) by smtp.web.de (mrweb003) with ESMTPA (Nemesis) id 0MTh7A-1TTv5w1tVA-00QjiM; Sun, 13 Jan 2013 03:35:41 +0100 In-Reply-To: (Stefan Monnier's message of "Sat, 12 Jan 2013 19:34:54 -0500") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.2.91 (gnu/linux) X-Provags-ID: V02:K0:McGelpMwkbcOv6DBNF8eYyGH5LAQ4rgFsKMAEQT7A9b Le9Jf/6Yftj7RoVyNeXmYzRGxGw9NUfqevaIHh6ic2fkkhrI3u xkIzP+YxYWQsvjEkTYSMM35dJj+lQXIekVUZVvQe38g2aSgzg3 fXlMYS6fmIwsd0ilhNiNL8wLi4nLQxEkAMsE4Z3/qAzey1B5nI czSaHFvPP08E1AsmLWY9OTlhOo68wruIwcALt1m0i8= X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.13 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x 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:69693 Archived-At: Stefan Monnier writes: > Of course, it also has its down sides: > > - returns nil, so (if foo (discard bar) then) runs the `then' in the > `else' branch. > > - only works at those syntactic places where an expression is expected > (e.g. (let ((a 1) (discard exp1 exp2) (b 2)) blabla) doesn't work. Indeed, you must keep this in mind. It might be confusing. > In any case, I think the current comments are good enough, and save the > programmer from having to choose which kind of comment to use. Ok, so please close. Thanks, Michael.