From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Damien Collard Newsgroups: gmane.emacs.devel Subject: Re: Regexp error scan (March 26) Date: Wed, 27 Mar 2019 16:28:22 +0100 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; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="208265"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (darwin) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Wed Mar 27 16:41:42 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 1h9AgP-000s3k-KS for ged-emacs-devel@m.gmane.org; Wed, 27 Mar 2019 16:41:41 +0100 Original-Received: from localhost ([127.0.0.1]:49676 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h9AgO-0006bT-Jx for ged-emacs-devel@m.gmane.org; Wed, 27 Mar 2019 11:41:40 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:49563) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h9ATc-00069a-8l for emacs-devel@gnu.org; Wed, 27 Mar 2019 11:28:29 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1h9ATb-0003Lm-Br for emacs-devel@gnu.org; Wed, 27 Mar 2019 11:28:28 -0400 Original-Received: from relay6-d.mail.gandi.net ([217.70.183.198]:39883) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1h9ATb-0003Ku-3z for emacs-devel@gnu.org; Wed, 27 Mar 2019 11:28:27 -0400 X-Originating-IP: 82.243.113.37 Original-Received: from FataMorgana (tou31-2-82-243-113-37.fbx.proxad.net [82.243.113.37]) (Authenticated sender: damien.collard@distfp.net) by relay6-d.mail.gandi.net (Postfix) with ESMTPSA id DDC09C0014 for ; Wed, 27 Mar 2019 15:28:22 +0000 (UTC) Mail-Followup-To: emacs-devel@gnu.org In-Reply-To: <045E4E1D-EF0B-41A8-809D-48F38AABD602@acm.org> ("Mattias \=\?utf-8\?Q\?Engdeg\=C3\=A5rd\=22's\?\= message of "Wed, 27 Mar 2019 15:41:06 +0100") X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 217.70.183.198 X-Mailman-Approved-At: Wed, 27 Mar 2019 11:41:30 -0400 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:234775 Archived-At: On Mer, mar 27 2019, Mattias Engdeg=C3=A5rd wrote: > 27 mars 2019 kl. 15.36 skrev Stefan Monnier : >>=20 >>>> (regexp-opt-charset (append erc-lurker-ignore-chars nil)) >>=20 >> 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. Hello, Why not use `string-to-list` then? It is implemented as (append ... nil) and would be much clearer imho. Damien