From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail From: Drew Adams Newsgroups: gmane.emacs.bugs Subject: bug#40968: 28.0.50; (apply nil) Date: Wed, 6 May 2020 12:17:21 -0700 (PDT) Message-ID: References: <85a72khq90.fsf@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="56530"; mail-complaints-to="usenet@ciao.gmane.io" Cc: Stefan Kangas , 40968@debbugs.gnu.org, Pip Cet To: Noam Postavsky Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed May 06 21:18:19 2020 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1jWPYf-000EWV-SU for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 06 May 2020 21:18:17 +0200 Original-Received: from localhost ([::1]:47928 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jWPYe-0004vY-PP for geb-bug-gnu-emacs@m.gmane-mx.org; 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Wed, 06 May 2020 19:17:24 +0000 Original-Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 046JChDe140937; Wed, 6 May 2020 19:17:23 GMT Original-Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by userp3020.oracle.com with ESMTP id 30us7ne6wf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 06 May 2020 19:17:23 +0000 Original-Received: from abhmp0018.oracle.com (abhmp0018.oracle.com [141.146.116.24]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 046JHMHB025516; Wed, 6 May 2020 19:17:22 GMT In-Reply-To: <85a72khq90.fsf@gmail.com> X-Priority: 3 X-Mailer: Oracle Beehive Extensions for Outlook 2.0.1.9.1 (1003210) [OL 16.0.4993.0 (x86)] X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9613 signatures=668687 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 adultscore=0 suspectscore=0 mlxlogscore=999 malwarescore=0 phishscore=0 mlxscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2005060155 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9613 signatures=668687 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 suspectscore=0 mlxscore=0 spamscore=0 clxscore=1015 priorityscore=1501 bulkscore=0 phishscore=0 impostorscore=0 malwarescore=0 lowpriorityscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2005060155 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:179839 Archived-At: > > apply function arg &rest more-args > > ^^^ > > > https://urldefense.com/v3/__https://www.cs.cmu.edu/Groups/AI/html/cltl/ > clm/node81.html__;!!GqivPVa7Brio!Kes9zsDqvdTyifr0LvhIg- > x3qHNl3XPQZaBRBxbjXsP-qGz7ieoaYPp6rfGGzbvg$ > > > > On the other hand the CL HyperSpec agrees with you: > > > > apply function &rest args+ =3D> result* > > > https://urldefense.com/v3/__http://www.lispworks.com/documentation/Hype > rSpec/Body/f_apply.htm__;!!GqivPVa7Brio!Kes9zsDqvdTyifr0LvhIg- > x3qHNl3XPQZaBRBxbjXsP-qGz7ieoaYPp6rY83YOj5$ >=20 > I think '&rest args+' is just BNF shorthand for 'arg &rest more-args' > (i.e., both signatures above require a total of 2 or more arguments). >=20 > https://urldefense.com/v3/__http://www.lispworks.com/documentation/Hype > rSpec/Body/01_dab.htm__;!!GqivPVa7Brio!Kes9zsDqvdTyifr0LvhIg- > x3qHNl3XPQZaBRBxbjXsP-qGz7ieoaYPp6rbGmUXoP$ Ah yes; thanks. So Common Lisp is unequivocally in the camp of requiring at least two args. And if Elisp follows that (which I think it should, unless someone can present a good use case for just (apply FUNCTION)), then it should raise an error if there are not at least two args. Just one opinion.