From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Philip Kaludercic Newsgroups: gmane.emacs.devel Subject: Re: Instead of pcase Date: Thu, 16 Nov 2023 07:37:04 +0000 Message-ID: <87fs169mjj.fsf@posteo.net> 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="40585"; mail-complaints-to="usenet@ciao.gmane.io" Cc: emacs-devel@gnu.org To: Richard Stallman Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Thu Nov 16 08:37:58 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 1r3Wwn-000AMj-RM for ged-emacs-devel@m.gmane-mx.org; Thu, 16 Nov 2023 08:37:57 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1r3Ww8-0002Fi-LM; Thu, 16 Nov 2023 02:37:17 -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 1r3Ww1-00028U-4e for emacs-devel@gnu.org; Thu, 16 Nov 2023 02:37:10 -0500 Original-Received: from mout01.posteo.de ([185.67.36.65]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1r3Wvz-0001FJ-Cw for emacs-devel@gnu.org; Thu, 16 Nov 2023 02:37:08 -0500 Original-Received: from submission (posteo.de [185.67.36.169]) by mout01.posteo.de (Postfix) with ESMTPS id A375B240028 for ; Thu, 16 Nov 2023 08:37:05 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1700120225; bh=NkUoOnn9Lm0f48qWpQ1zffNwNFw40DAZT0FkvKHsc60=; h=From:To:Cc:Subject:Autocrypt:Date:Message-ID:MIME-Version:From; b=he/dGVyF1ph/ZVP4me0xfRfwCxyjNv+EcneR7VW9iDjK4ZPznpkekf8rqMNlcIyNo 10TPEyFLw56lKToYFEmVLYqyMN0+5saL/oMT//m3XFgLEoNdWvUm98AmMwC6aLa1rN PRq17wbVdZTiAUgs3nCnY87+bvP0aUg0uEkICIS+axYN5t+eW3BD/MEn0bR+A7lMTy xv9l6nXxqpUrvfgISLMyWuLhNC4z7BHJyJkDOw1V8fM1rflZLBZmAECP9uMvwwNlkF sFcyE6XDkhBZ284IkSVuKrTi/xL3FYaBwda4yjx+fGf59T7jYrw2XBGE3gx2KqalNh GIGlM/y0uscGA== Original-Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4SWBgj1Xlsz6twn; Thu, 16 Nov 2023 08:37:05 +0100 (CET) In-Reply-To: (Richard Stallman's message of "Wed, 15 Nov 2023 22:04:37 -0500") Autocrypt: addr=philipk@posteo.net; keydata= mDMEZBBQQhYJKwYBBAHaRw8BAQdAHJuofBrfqFh12uQu0Yi7mrl525F28eTmwUDflFNmdui0QlBo aWxpcCBLYWx1ZGVyY2ljIChnZW5lcmF0ZWQgYnkgYXV0b2NyeXB0LmVsKSA8cGhpbGlwa0Bwb3N0 ZW8ubmV0PoiWBBMWCAA+FiEEDg7HY17ghYlni8XN8xYDWXahwukFAmQQUEICGwMFCQHhM4AFCwkI BwIGFQoJCAsCBBYCAwECHgECF4AACgkQ8xYDWXahwulikAEA77hloUiSrXgFkUVJhlKBpLCHUjA0 mWZ9j9w5d08+jVwBAK6c4iGP7j+/PhbkxaEKa4V3MzIl7zJkcNNjHCXmvFcEuDgEZBBQQhIKKwYB BAGXVQEFAQEHQI5NLiLRjZy3OfSt1dhCmFyn+fN/QKELUYQetiaoe+MMAwEIB4h+BBgWCAAmFiEE Dg7HY17ghYlni8XN8xYDWXahwukFAmQQUEICGwwFCQHhM4AACgkQ8xYDWXahwukm+wEA8cml4JpK NeAu65rg+auKrPOP6TP/4YWRCTIvuYDm0joBALw98AMz7/qMHvSCeU/hw9PL6u6R2EScxtpKnWof z4oM Received-SPF: pass client-ip=185.67.36.65; envelope-from=philipk@posteo.net; helo=mout01.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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=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:312786 Archived-At: Richard Stallman writes: > I can see why people want something along those lines. Using `cond' > and `let' to do these jobs feels long-winded and cumbersome; they were > not designed to make this easy. So we wish for something to make such > code more concise. [...] > I'm looking at adapting some of the features of `pcase' into other > constructs, so as to make type-discrimination code more concise than > in old-fashioned Lisp, but _not_ so concise as to be cryptic and > burdensome. The critical feature of pcase is pattern matching. The complexity of `pcase' is the extensibility -- a lisp-like flexibility that makes it so attractive -- that a simpler macro might not need. The question is, if one would restrict pcase to just matching expressions using ` and , like (pcase sexp ;match various top-level constructs (`(defun ,name ,args ,body) ...) (`(defvar ,name, ,value) ...) (`(require ',symbol) ...) ...) would that be simple enough in your opinion? Anyone familiar with ML-style functional programming, Prolog or the notion of unification should be able to understand this quickly enough, I assume?