From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Ihor Radchenko Newsgroups: gmane.emacs.devel Subject: Re: cond* Date: Thu, 01 Feb 2024 16:26:57 +0000 Message-ID: <875xz86tgu.fsf@localhost> References: <87frzuae9n.fsf@posteo.net> <871qbatqc8.fsf@posteo.net> <87wmsz7lzn.fsf@posteo.net> <87edf1m7lq.fsf@localhost> <87cyui76l9.fsf@localhost> <871qauy1io.fsf@localhost> <87wmsjyi2h.fsf@localhost> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="2882"; mail-complaints-to="usenet@ciao.gmane.io" Cc: emacs-devel@gnu.org To: rms@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Thu Feb 01 17:24:37 2024 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 1rVZre-0000U0-Gb for ged-emacs-devel@m.gmane-mx.org; Thu, 01 Feb 2024 17:24:34 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rVZqk-00080h-JF; Thu, 01 Feb 2024 11:23:38 -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 1rVZqi-00080D-SO for emacs-devel@gnu.org; Thu, 01 Feb 2024 11:23:36 -0500 Original-Received: from mout02.posteo.de ([185.67.36.66]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rVZqd-0004XX-FY for emacs-devel@gnu.org; Thu, 01 Feb 2024 11:23:36 -0500 Original-Received: from submission (posteo.de [185.67.36.169]) by mout02.posteo.de (Postfix) with ESMTPS id 3E39F240101 for ; Thu, 1 Feb 2024 17:23:27 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1706804607; bh=suTib8q+TaVZj/0gNYdLnirMEI6y2hckDrUp0Or0V7E=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type: From; b=nm+I64/D71JxmwXtKLbZtRFRW01nS/CbSWD4C29tW7kVDS+zn0lU2F7mrGANgRqkt CqBnC2EkmdY4OZCS1Y8/aI3Ur5W7WvWkK+vBZ0m2aqWWetTQsPJzS0rr0W5Abkexmc PCaVkh9AT+8LsNLwuGetzuZiAtfcFv1a4nerrSuohe3uQHd2yQU6hE4urR+4YUGgV0 pZDkB633+6l1KWUUbKY/u4GqdT9IXYhdF3zpKrHHdJ9/z2gjnd16Cz4cptrPs0TBxu 2MkbbVfLRxiQqGecMJ9kTIyAFJz/+HuD+86XeTL8fWHdJ03A7vf4mzXg1SIyXN6axa jMzwMFvpbr/sg== Original-Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4TQkjV4vF3z6twH; Thu, 1 Feb 2024 17:23:26 +0100 (CET) In-Reply-To: Received-SPF: pass client-ip=185.67.36.66; envelope-from=yantar92@posteo.net; helo=mout02.posteo.de X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 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_MED=-2.3, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01, T_SPF_HELO_TEMPERROR=0.01 autolearn=unavailable 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:315703 Archived-At: Richard Stallman writes: > > Other than rx, one missing feature is an ability to match against > > multiple values in a single condition: > > (defun yant/list-sum (list) > > (apply #'+ list)) > > (pcase '(1 2 3) > > ((and `(,x ,y ,z) (app yant/list-sum (and sum (guard (< 2 sum))))) > > (format "%d + %d + %d = %d; 2 is < %d" x y z sum sum))) > > ; => "1 + 2 + 3 = 6; 2 is < 6" > > Understanding this was a struggle, but I think it can be done with > > (cond* ((match* `(,x ,y ,z) list-of-three)) > ((< 2 (+ x y z)) > success))) Nope. Consider (let ((list-of-three '(1 2))) (cond* ((match* `(,x ,y ,z) list-of-three)) ((< 2 (+ x y z)) 'success))) ; => (wrong-type-argument number-or-marker-p nil) Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil) (+ 1 2 nil) (< 2 (+ x y z)) (if (< 2 (+ x y z)) (progn 'success)) (let* ((z (nth 2 d2495))... I used the latest version of cond* you submitted in https://yhetil.org/emacs-devel/86cytg1vcu.fsf@gnu.org/T/#t Also, I was surprised by (let ((list-of-three '(1 2 3 4))) (cond* ((match* `(,x ,y ,z) list-of-three)) ((< 2 (+ x y z)) 'success))) ; => success I did not expect list of four to match `(,x ,y ,z). -- Ihor Radchenko // yantar92, Org mode contributor, Learn more about Org mode at . Support Org development at , or support my work at