From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: Regexp error scan (March 26) Date: Wed, 27 Mar 2019 10:45:58 -0400 Message-ID: References: <0E648A80-8673-44DB-B481-981474AC3D7C@acm.org> <77419a89-ce9f-919b-c221-c7a3b938587a@cs.ucla.edu> <87h8bpvv74.fsf@tcd.ie> <7E84CED0-9E85-45FB-8BBF-B87ED51F4818@acm.org> <045E4E1D-EF0B-41A8-809D-48F38AABD602@acm.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="224922"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) Cc: emacs-devel@gnu.org To: Mattias =?windows-1252?Q?Engdeg=E5rd?= Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Wed Mar 27 15:46:24 2019 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1h99ou-000wMR-8g for ged-emacs-devel@m.gmane.org; Wed, 27 Mar 2019 15:46:24 +0100 Original-Received: from localhost ([127.0.0.1]:48764 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h99ot-0003RQ-77 for ged-emacs-devel@m.gmane.org; Wed, 27 Mar 2019 10:46:23 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:40256) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h99oe-0003Mr-Kx for emacs-devel@gnu.org; Wed, 27 Mar 2019 10:46:10 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1h99oa-0007tx-O6 for emacs-devel@gnu.org; Wed, 27 Mar 2019 10:46:06 -0400 Original-Received: from pmta31.teksavvy.com ([76.10.157.38]:2192) by eggs.gnu.org with esmtps (TLS1.0:RSA_ARCFOUR_SHA1:16) (Exim 4.71) (envelope-from ) id 1h99oZ-0007ry-0L for emacs-devel@gnu.org; Wed, 27 Mar 2019 10:46:03 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: =?us-ascii?q?A2EoAQB/i5tc//zyd0taCRoBAQEBAQIBA?= =?us-ascii?q?QEBBwIBAQEBgWWCEYFZEohnhEmKRoIfIgGaAQ8ThFMEAgKFLiM4EgEBAwEBAQg?= =?us-ascii?q?BAwICAmkohUwGViMQCzQSFBgNJIUrqz+KLIEvAYtIgX+EIz6BBIMWhgsDpSsJk?= =?us-ascii?q?2GBcwGJJohyg16bJAyBZCKBVjMaCDA7B4IFYYIhjkUmkCUBAQ?= X-IPAS-Result: =?us-ascii?q?A2EoAQB/i5tc//zyd0taCRoBAQEBAQIBAQEBBwIBAQEBgWW?= =?us-ascii?q?CEYFZEohnhEmKRoIfIgGaAQ8ThFMEAgKFLiM4EgEBAwEBAQgBAwICAmkohUwGV?= =?us-ascii?q?iMQCzQSFBgNJIUrqz+KLIEvAYtIgX+EIz6BBIMWhgsDpSsJk2GBcwGJJohyg16?= =?us-ascii?q?bJAyBZCKBVjMaCDA7B4IFYYIhjkUmkCUBAQ?= X-IronPort-AV: E=Sophos;i="5.60,277,1549947600"; d="scan'208";a="88945976" Original-Received: from 75-119-242-252.dsl.teksavvy.com (HELO fmsmemgm.homelinux.net) ([75.119.242.252]) by smtp.teksavvy.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 27 Mar 2019 10:45:58 -0400 Original-Received: by fmsmemgm.homelinux.net (Postfix, from userid 20848) id A7088AE267; Wed, 27 Mar 2019 10:45:58 -0400 (EDT) In-Reply-To: <045E4E1D-EF0B-41A8-809D-48F38AABD602@acm.org> ("Mattias =?windows-1252?Q?Engdeg=E5rd=22's?= message of "Wed, 27 Mar 2019 15:41:06 +0100") X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 76.10.157.38 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 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.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:234772 Archived-At: >>>> (regexp-opt-charset (append erc-lurker-ignore-chars nil)) >> Why do we need the append-nil thingy? >> Does regexp-opt-charset modify its argument by side-effect? > > No, it's a way to convert a string to a list of characters which is what regexp-opt-charset expects. > (mapcar #'identity ...) would also work, but this is a little shorter. Ah, good. But it would deserve a comment, Stefan