From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Heime via Users list for the GNU Emacs text editor Newsgroups: gmane.emacs.help Subject: RE: [External] : Re: Keywords as function arguments for control flow Date: Fri, 29 Nov 2024 21:26:08 +0000 Message-ID: References: <87y1125zre.fsf@gnu.org> Reply-To: Heime 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="26655"; mail-complaints-to="usenet@ciao.gmane.io" Cc: Tassilo Horn , Heime via Users list for the GNU Emacs text editor To: Drew Adams Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Nov 29 22:26:51 2024 Return-path: Envelope-to: geh-help-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 1tH8Vn-0006ns-5p for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 29 Nov 2024 22:26:51 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tH8VH-0006FZ-70; Fri, 29 Nov 2024 16:26:19 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tH8VE-0006FK-WD for help-gnu-emacs@gnu.org; Fri, 29 Nov 2024 16:26:17 -0500 Original-Received: from mail-10698.protonmail.ch ([79.135.106.98]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tH8VD-0006Bz-5t for help-gnu-emacs@gnu.org; Fri, 29 Nov 2024 16:26:16 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=protonmail.com; s=protonmail3; t=1732915571; x=1733174771; bh=kmhwIM99H2JwlYAiLVufjud9hBAiUPapTcFc7u+laUs=; h=Date:To:From:Cc:Subject:Message-ID:In-Reply-To:References: Feedback-ID:From:To:Cc:Date:Subject:Reply-To:Feedback-ID: Message-ID:BIMI-Selector:List-Unsubscribe:List-Unsubscribe-Post; b=q7Ya0ngOvv3+gTEJMEiVObyKGNzN2pi1sUEcl7PwLOdZqLO3Ctt+w+c4b64Os90io j/pO1sBsNiMkCDdk9f/7jndre7M+9gVpDF9V8UdGq4/4K44//8c9XHP0qGVQ4n5syw ty+jD2luaRO89KMENmxAszX5Szf2FOSJXvE/ENKRWlTbCZw7vK6c2IaDceRPT5h6xk Y/6eVgvPoLHLPJgUgo+5Yg2GOqVSefOUpKpC5v1FxiFHFbc1McILMZmoH53bS2uKn9 q5wRIENYuvTy98HYXc/g59DoiVJDFXPYX7DAJMd/7DWTlC8EdMSXD+g/mYCW9MPSJt n3JzclJliHdaQ== In-Reply-To: Feedback-ID: 57735886:user:proton X-Pm-Message-ID: c1ab9fda34a0daa8bc1765a04ce04b32ab533767 Received-SPF: pass client-ip=79.135.106.98; envelope-from=heimeborgia@protonmail.com; helo=mail-10698.protonmail.ch 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, FREEMAIL_FROM=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.help:148449 Archived-At: On Saturday, November 30th, 2024 at 9:06 AM, Drew Adams wrote: > > Your example uses symbols not keywords. Correct. But because there was the suggestion of keywords, I thought of looking into them as well. It seems that the only difference in using :this rather than 'this. Symbol checking with pcase is=20 (pcase some-variable ('this (do-something)) and for keywords it would be (pcase some-variable (:this (do-something)) Can one just pass :tabtail as an argument to a function? In my case, would this be as so? (poulatuk '(72 :tabtrail :global))=20 > And one can Ask Emacs. This is what the Elisp manual > has to say about keywords: >=20 > A symbol whose name starts with a colon (':') is > called a keyword symbol. These symbols automatically > act as constants, and are normally used only by > comparing an unknown symbol with a few specific > alternatives. See "Variables that Never Change". >=20 > https://www.gnu.org/software/emacs/manual/html_node/elisp/Symbol-Type.htm= l >=20 > That "Variables that Never Change" link takes you here: >=20 > https://www.gnu.org/software/emacs/manual/html_node/elisp/Constant-Variab= les.html >=20 > where it says this: >=20 > Function: keywordp object =C2=B6 > function returns t if object is a symbol whose > name starts with ':', interned in the standard > obarray, and returns nil otherwise.