From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Lars Ingebrigtsen Newsgroups: gmane.emacs.devel Subject: Re: Make regexp handling more regular Date: Wed, 02 Dec 2020 11:44:52 +0100 Message-ID: <874kl44hcr.fsf@gnus.org> References: <87lfeg60iy.fsf@gnus.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="2261"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Wed Dec 02 12:34:02 2020 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 1kkQOY-0000Qi-JY for ged-emacs-devel@m.gmane-mx.org; Wed, 02 Dec 2020 12:34:02 +0100 Original-Received: from localhost ([::1]:55566 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kkQOX-0005tC-E9 for ged-emacs-devel@m.gmane-mx.org; Wed, 02 Dec 2020 06:34:01 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:59398) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kkPdD-00048T-Iu for emacs-devel@gnu.org; Wed, 02 Dec 2020 05:45:07 -0500 Original-Received: from quimby.gnus.org ([2a01:4f9:2b:f0f::2]:49256) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kkPdB-0004sS-Q4 for emacs-devel@gnu.org; Wed, 02 Dec 2020 05:45:07 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:To:From:Sender:Reply-To:Cc:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=0o4uODjwTbAlG7rV7LjxiTTmxACscznb8CV5wBpnKhc=; b=bCnksLKSDBadiIX2apwwQhdvQp XFcwmpU4nOt53kj0NmGvqKQrVYPqqmx9Qkrja1lH4qYqTwuVixYnZSdifn5CgAdKuZNONwjBY645L EmZIgwK7OWsJqmdiypiD/3u0ACei6lQ5cY0g1MnL6Nc8MMksth5OwbTdSNusarvXgZ8Y=; Original-Received: from cm-84.212.202.86.getinternet.no ([84.212.202.86] helo=xo) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kkPcz-0005Ck-Fz for emacs-devel@gnu.org; Wed, 02 Dec 2020 11:45:03 +0100 Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwBAMAAAClLOS0AAAABGdBTUEAALGPC/xhBQAAACBj SFJNAAB6JgAAgIQAAPoAAACA6AAAdTAAAOpgAAA6mAAAF3CculE8AAAAD1BMVEVOS1M7NDmLW1dg W2L///9nMV5hAAAAAWJLR0QEj2jZUQAAAAd0SU1FB+QMAgopLSL2kPYAAAGGSURBVDjLbVOLlcMg DDPxAs5NcEcWoHj/3U6ygdC0vDShkj9CcUTOj2UVS8oX4iDxBkWUSX0Qllfgb4SMhONBmMXjqE8i k0yvZ6mob6a91qsvQrARECIAM0MKehY2FuCo36/MQNkCpKQg6bX3q9ULuSAYXEgIOiiJFjAbRxPR 5s2r+y9LRHBBKgnvrTsuB0go9AiJS4EiJwpE2iC4Gh5iwLSJTIJUAy5xqjZRxLJ+m5FIxh1/G+vj Fp2jMkKydr8ccbMn1WffyhvURDyD99UA+ejxjktkyUeCfSN4hBOlNFvfi9pgNeSHLt/NgH9hyVFs 1UtHuIcjP+OUoWeTdh4vvm17EB7zSCFDouokzp8/DnM6wJ8uoozBStcoMYgyCJuGDoEYsWJjRIep WQzEC1tm4TxZMXvc67QSPvhOUBFn+Jyq+o2LzAEevuQUzHL3J7TWJEuRDZX5bmSPbHwvdJx/8MAw NN0yPL6CWDsxvdA1KrlMp+E6zresQzoLaeiI72M4i72uEPd/qbBeFEFz3aUAAAAldEVYdGRhdGU6 Y3JlYXRlADIwMjAtMTItMDJUMTA6NDE6NDQrMDA6MDAo/q0FAAAAJXRFWHRkYXRlOm1vZGlmeQAy MDIwLTEyLTAyVDEwOjQxOjQ0KzAwOjAwWaMVuQAAAABJRU5ErkJggg== X-Now-Playing: Japan's _Exorcising Ghosts_: "Nightporter" In-Reply-To: <87lfeg60iy.fsf@gnus.org> (Lars Ingebrigtsen's message of "Wed, 02 Dec 2020 10:05:25 +0100") Received-SPF: pass client-ip=2a01:4f9:2b:f0f::2; envelope-from=larsi@gnus.org; helo=quimby.gnus.org 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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 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" Xref: news.gmane.io gmane.emacs.devel:260177 Archived-At: Lars Ingebrigtsen writes: > (when (setq match (rx-string-match "[a-z]" string)) > (foo) > (bar (match match 0))) This would, of course, be more idiomatic as (when-let ((match (rx-string-match "[a-z]" string))) (foo) (bar (match match 0))) Another thing that occurred to me is that we could allow the match object accessors to return nil on nil objects. Then, what's currently this: (let ((string (foo))) (and (string-match "[a-z]" string) (match-string 0 string))) would just be this: (match (rx-string-match "[a-z]" (foo)) 0) -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no