From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier via "Bug reports for GNU Emacs, the Swiss army knife of text editors" Newsgroups: gmane.emacs.bugs Subject: bug#49809: [PATCH] Add macro 'pcase-setq' Date: Thu, 05 Aug 2021 09:34:55 -0400 Message-ID: References: <07ad5892-3343-4c35-00e3-9753bca5f67b@protonmail.com> <87sfzowvp0.fsf@web.de> Reply-To: Stefan Monnier Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="15934"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: Okam , 49809@debbugs.gnu.org To: Michael Heerdegen Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu Aug 05 15:36:11 2021 Return-path: Envelope-to: geb-bug-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 1mBdXe-0003vb-Iq for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 05 Aug 2021 15:36:10 +0200 Original-Received: from localhost ([::1]:47922 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mBdXd-0005xb-9s for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 05 Aug 2021 09:36:09 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:41616) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mBdXW-0005xP-DI for bug-gnu-emacs@gnu.org; Thu, 05 Aug 2021 09:36:03 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:34664) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mBdXW-0001l5-7K for bug-gnu-emacs@gnu.org; Thu, 05 Aug 2021 09:36:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1mBdXW-0005oS-50 for bug-gnu-emacs@gnu.org; Thu, 05 Aug 2021 09:36:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 05 Aug 2021 13:36:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 49809 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: patch Original-Received: via spool by 49809-submit@debbugs.gnu.org id=B49809.162817051622291 (code B ref 49809); Thu, 05 Aug 2021 13:36:02 +0000 Original-Received: (at 49809) by debbugs.gnu.org; 5 Aug 2021 13:35:16 +0000 Original-Received: from localhost ([127.0.0.1]:46210 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1mBdWm-0005nT-Ax for submit@debbugs.gnu.org; Thu, 05 Aug 2021 09:35:16 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:53309) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1mBdWj-0005n8-LA for 49809@debbugs.gnu.org; Thu, 05 Aug 2021 09:35:14 -0400 Original-Received: from pmg2.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id 8724D80B63; Thu, 5 Aug 2021 09:35:07 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id 00C058043C; Thu, 5 Aug 2021 09:35:06 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1628170506; bh=M6f9N+30e6YIzT+n61AOkZUeyEW/V9xNsxzQ1ndwhPo=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=cLS3I3w6j89quDPR2X/4RvAkhxBRaR7LoTR9ukUY3TuJOeKyw9eAn34VaMI4XcKUx Ctq0cQD5hwL3sAExsqo/ind3Hvbprk8s1xEWHW0bNRUmVk8xf0I/tKUXTiZ1HrtuZE +/ekbmpb6ecuxybgFbqFdB0P0mzeL8PpUbeBL2VT982F8GuNlSn5cAmf9GZKUujC1I lB0qdZNLYTqtV9nKosDiUS01sHHxgHokQPU3y+6IQ1H9lK1TB/DfTOvbs+DJoxoI8S qiCl8aUB0y09K3gPO+/NTPSBS1BQsi6TPLppKYyVqyRttEZik7/homN68fIGYTkwSU +9fKcAshv3GVA== Original-Received: from alfajor (unknown [216.154.29.138]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id B924E1201C8; Thu, 5 Aug 2021 09:35:05 -0400 (EDT) In-Reply-To: <87sfzowvp0.fsf@web.de> (Michael Heerdegen's message of "Thu, 05 Aug 2021 03:02:03 +0200") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:211233 Archived-At: Michael Heerdegen [2021-08-05 03:02:03] wrote: > Stefan Monnier via "Bug reports for GNU Emacs, the Swiss army knife of > text editors" writes: > >> Looks good. > > How much trouble would it be to provide a `setf' variant? > > A problem could be any syntax that is used for both pcase patterns and > place expressions I guess. Adding support for (setf (pcase PAT) VAL) is very easy to do without any change to pcase or gv machinery. Adding support for (setf PAT VAL), is a bit harder (and introduces a risk because of the potential overlap, tho this risk is small: gv places are normally defined for "eliminators" whereas pcase patterns are usually defined for "constructors"), but still fairly easy. Mixing pcase patterns and gv places as in (setf `(,a . ,(aref V N)) EXP) would be the most flexible option but I haven't thought much about how hard it would be to implement, and I'm not sure it's worth the trouble. Stefan