From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Tomas Hlavaty Newsgroups: gmane.emacs.devel Subject: Re: combining cond and let, to replace pcase. Date: Thu, 23 Nov 2023 08:02:16 +0100 Message-ID: <87v89t7y13.fsf@neko.mail-host-address-is-not-set> References: Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="40906"; mail-complaints-to="usenet@ciao.gmane.io" To: rms@gnu.org, emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Thu Nov 23 08:03:16 2023 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 1r63k3-000AQ1-My for ged-emacs-devel@m.gmane-mx.org; Thu, 23 Nov 2023 08:03:15 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1r63jN-0003ti-2U; Thu, 23 Nov 2023 02:02:33 -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 1r63jL-0003tM-L8 for emacs-devel@gnu.org; Thu, 23 Nov 2023 02:02:32 -0500 Original-Received: from logand.com ([37.48.87.44]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1r63jK-0002ly-5R; Thu, 23 Nov 2023 02:02:31 -0500 Original-Received: by logand.com (Postfix, from userid 1001) id BC58019E77A; Thu, 23 Nov 2023 08:02:18 +0100 (CET) X-Mailer: emacs 28.2 (via feedmail 11-beta-1 I) In-Reply-To: Received-SPF: pass client-ip=37.48.87.44; envelope-from=tom@logand.com; helo=logand.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 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-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:313144 Archived-At: On Wed 22 Nov 2023 at 21:58, Richard Stallman wrote: > (cond* > ;; Same as a clause in `cond', > (CONDITION > do-this-if-CONDITION-then-exit...) > > ;; Variables to bind, as in let > (:bind (x foobar) y z (foo 5) a) > ;; Bindings continue in effect. This seems nicer: (if CONDITION do-this-if-CONDITION-then-exit... (let ((x foobar) y z (foo 5) a) ...)) Are there other macros where bindings continue in effect cond* style? It looks like everybody is trying to design a "do it all super-macro" instead of using something like cl-destructuring-bind. > (:match (`(expt ,foo ,bar) x) That looks like writing (let (`(,foo 42)) ...) Are there other macros where unquote marks variable name?