From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Daniel Semyonov Newsgroups: gmane.emacs.devel Subject: Re: combining cond and let, to replace pcase. Date: Fri, 24 Nov 2023 05:26:02 +0200 Message-ID: <5BCDF907-6D0D-47CA-AD07-3A0A5D18CC5A@dsemy.com> 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="37572"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: K-9 Mail for Android To: emacs-devel@gnu.org, rms@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Fri Nov 24 04:27:08 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 1r6MqS-0009bR-05 for ged-emacs-devel@m.gmane-mx.org; Fri, 24 Nov 2023 04:27:08 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1r6MpV-0006gh-9G; Thu, 23 Nov 2023 22:26:09 -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 1r6MpT-0006gV-Vd for emacs-devel@gnu.org; Thu, 23 Nov 2023 22:26:08 -0500 Original-Received: from dsemy.com ([46.23.89.208]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1r6MpP-0000T8-Du; Thu, 23 Nov 2023 22:26:07 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; s=dkim; bh=31pWCqVwcTJMX 9glRxZY3LpUt/qSFwIdexAYUI4z9GI=; h=references:in-reply-to:subject:to: from:date; d=dsemy.com; b=XI66BVouP5RQjgL8OZeXn1vP7PiAX6om0ULXTHZkOn3p Z+QAG4X8fWCQInG9sL7gS8XmK+6htA4pjdRGrNwoEC9b2+7Ghj3+pPLWmutMxcEJuO1qH9 zHUjlxyKEv/P6/0dMinyPs3zuNk0hdHXzaMFVVQbz7NsH0u/iN9152Gs1/hd4wnnVxXTqq +zWihrgYNuvtk6D+KA5kfVShXG/GItJdGaSXSvcpJbXNC6/x3/03wvWCY7jqjbBOcNiKjJ MbrL7AjQPmMCTVIiXdtMJXUEeFOJGklLeJ0qcQkbyEF9vcQZRjTsEtMR2GHh+slhVC3ypn FmPtvwdotgcEM14Tqg== Original-Received: from [127.0.0.1] (CUST-29.202.102.5.018.net.il [5.102.202.29]) by dsemy.com (OpenSMTPD) with ESMTPSA id 20098b71 (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO); Fri, 24 Nov 2023 04:26:00 +0100 (CET) In-Reply-To: Received-SPF: pass client-ip=46.23.89.208; envelope-from=daniel@dsemy.com; helo=dsemy.com 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, 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:313164 Archived-At: Sorry, I sent the last mail as HTML by accident, here's a more readable ver= sion of the code: (cond* (:bind foo bar (x foobar)) ;; IMO changing t to ':always' would make it very clear what's ;; going on here=2E (t (match-set `(a ,foo ,bar) x)) ((match-set `(b ,foo ,bar) x) ;; do stuff and exit ) ;; more conditions=2E=2E=2E ) (cond* (:bind (x foobar)) (:match (`(a ,foo ,bar) x)) (:match (`(b ,foo ,bar) x) ;; do stuff and exit=2E=2E=2E ) ;; more conditions=2E=2E=2E )