From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= Newsgroups: gmane.emacs.bugs Subject: bug#5393: Patch for lookaround assertion in regexp Date: Thu, 27 Jun 2019 21:17:05 +0200 Message-ID: References: Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="30475"; mail-complaints-to="usenet@blaine.gmane.org" To: Lars Ingebrigtsen , stephen.berman@gmx.net, rgm@gnu.org, 5393@debbugs.gnu.org, t.matsuyama.pub@gmail.com Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Jun 27 21:18:21 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1hgZuW-0007mR-P9 for geb-bug-gnu-emacs@m.gmane.org; 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Thu, 27 Jun 2019 15:17:15 -0400 X-Authenticated-User: mattiase@bredband.net DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1561663028; bh=MV+ihWzhmdqE8GmfcT1Tt/saLeO4TWfHjZZ1yxeRH1s=; h=From:Subject:Date:To:From; b=Bk5vCefk8Zg0MjSvdzpxVqu2KuUoztc0jMa55IY/lmvlxP1dGMXOLrxgfGQo4Qbsy +ZHcGT/KEMq92SbKWNuyFdzhBjNJtqnCXxbdUDg9zIuieWp4i3ocJFon1R6e6FjpPN djX96q7uCQV6j/O0dYKMYVH9CP6B5b/Zd4HzzdwU= Feedback-ID: mattiase@acm.or Original-Received: from [192.168.1.65] (c-e636e253.032-75-73746f71.bbcust.telenor.se [83.226.54.230]) (authenticated bits=0) by mail102c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id x5RJH60M013493; Thu, 27 Jun 2019 19:17:07 +0000 X-Mailer: Apple Mail (2.3445.104.11) X-CTCH-RefID: str=0001.0A0B0205.5D151634.0007, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: 0.000 X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=RfS+9Wlv c=1 sm=1 tr=0 a=M+GU/qJco4WXjv8D6jB2IA==:117 a=M+GU/qJco4WXjv8D6jB2IA==:17 a=kj9zAlcOel0A:10 a=1eQd1FuWHtpiRMpZeMAA:9 a=CjuIK1q_8ugA:10 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.51.188.43 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.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:161644 Archived-At: >That looks pretty cool to me, but there was next to no discussion about = this at the time (2009), which is a bit odd...=20 Didn't see it until now myself, and it looks useful, but perhaps it's = unwise to add features that couldn't easily make it into a DFA-based = engine. Positive lookahead maybe, the rest probably not. (The old engine = would need to be kept around for backrefs, but those are fairly rare in = actual use.)