From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Lars Ingebrigtsen Newsgroups: gmane.emacs.devel Subject: Re: Docs for &optional and &rest arguments together Date: Wed, 30 Dec 2020 04:12:51 +0100 Message-ID: <87o8icq958.fsf@gnus.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="31643"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: emacs-devel@gnu.org To: Arthur Miller Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Wed Dec 30 04:13:44 2020 Return-path: Envelope-to: ged-emacs-devel@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 1kuRvk-00087q-9d for ged-emacs-devel@m.gmane-mx.org; Wed, 30 Dec 2020 04:13:44 +0100 Original-Received: from localhost ([::1]:43390 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kuRvj-0001h0-6B for ged-emacs-devel@m.gmane-mx.org; Tue, 29 Dec 2020 22:13:43 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:55930) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kuRv4-0001I3-Ap for emacs-devel@gnu.org; Tue, 29 Dec 2020 22:13:02 -0500 Original-Received: from quimby.gnus.org ([2a01:4f9:2b:f0f::2]:50394) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kuRv2-0003MR-Nh for emacs-devel@gnu.org; Tue, 29 Dec 2020 22:13:02 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Transfer-Encoding:Content-Type:MIME-Version:Message-ID :In-Reply-To:Date:References:Subject:Cc:To:From:Sender:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=M8s8gija8yMpABGb1ZjxIud2kZsari530UNbzyl0mWs=; b=k4+RPf5uJRaaYTG6E4hYnbyV5Z BnKHhJFfFOhwwmgLtUOy253L/eD0UpJwjL929UVFcOQEz9EaLWoYLuHIhsVULNO1/z0IH69zBH1+G B/8WXX+U7SjVNoydXdYLKX3PZvIKpktfiHkBhS67QoVa52TfalMIWkMIzDBdhj/hdnSc=; Original-Received: from cm-84.212.202.86.getinternet.no ([84.212.202.86] helo=xo) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kuRuu-0001Gs-RX; Wed, 30 Dec 2020 04:12:56 +0100 Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwBAMAAAClLOS0AAAABGdBTUEAALGPC/xhBQAAACBj SFJNAAB6JgAAgIQAAPoAAACA6AAAdTAAAOpgAAA6mAAAF3CculE8AAAAElBMVEVeMjCKSzkXDRSj Z1ezhGj///+MK9mlAAAAAWJLR0QF+G/pxwAAAAd0SU1FB+QMHgIkBbYx/94AAAGVSURBVDjLrZTh leMgDISF2AJQcAEyuQLMygXcLvRf00lAHHD+Hi8vifnsGTEIA1B6D5ZrAEBK+kn6xwVXwUZsAFNC 6MPVE57ILC8w5oHD1n47SMugt8cK/AXCCvb/B64lwuM9aZXfAWt1uxBOUjgUQtokY3qugGPJ+yny 8YQTyb4Y4BVonD/bDTQLkVoUqIdfAOp8UYtPALFUvdBy4yoF6CRnmCxe68DkDvt+LoCRPcSDOc1A Q+TgSGKWAOjfAAxQNJAJ5/ZRR9toBXp1A05OBVqpm0FCBTUbyH4BPUN1keMOOAqReAl3ABQz6Owj TqAlomWF5DPOwCIBMwEKC+hS+kgOkOT+BFmPJ2C5ebALdggeo6iSO2AFRKQRdgvdMuoAWY1Nq4Gz BFLSgLkrGhtef+OQgpZvfhjIW4hwasNYuKGlNdpQBYPIAGhp5VZ4/N7rXzvP8K06TW90N/kCVtgL TCfn+Kq1rxzG3S3PXaAW3ZsPEI+vQiMruLQQWIvNWym94a63gAPULYDSVz5p/bFXz7FnZPoHnpKa sWn/yd8AAAAldEVYdGRhdGU6Y3JlYXRlADIwMjAtMTItMzBUMDI6MzY6MDUrMDA6MDDoTYxrAAAA JXRFWHRkYXRlOm1vZGlmeQAyMDIwLTEyLTMwVDAyOjM2OjA1KzAwOjAwmRA01wAAAABJRU5ErkJg gg== X-Now-Playing: David Bowie's _ChangesTwoBowie_: "John, I'm Only Dancing (Again) 1975" In-Reply-To: (Arthur Miller's message of "Tue, 29 Dec 2020 14:26:32 +0100") Received-SPF: pass client-ip=2a01:4f9:2b:f0f::2; envelope-from=larsi@gnus.org; helo=quimby.gnus.org X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:262096 Archived-At: Arthur Miller writes: > (required-vars=E2=80=A6 > [&optional [optional-vars=E2=80=A6]] > [&rest [rest-var]]) > > But when I use it, I still have to pass a nil for the "optional" > argument, which I think is also not so strange either, otherwise how > will Emacs now where "optional" argument list ends and where "rest" > argument list starts? No? Right. > If actual arguments for the optional and rest variables are omitted, > then they always default to nil." > > https://www.gnu.org/software/emacs/manual/html_node/elisp/Argument-List.h= tml > > I get the impression that I actually can omit the optional argument(s) > even when followed by the &rest keyword. The paragraph just below this one, though, describes in detail what happens with a mixed &optional and &rest argument list, so that's not my impression when reading that node. --=20 (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no