From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: "Perry E. Metzger" Newsgroups: gmane.emacs.devel Subject: Re: [Emacs-diffs] master 938d252 4/4: Make regex matching reentrant; update syntax during match Date: Tue, 19 Jun 2018 11:37:29 -0400 Message-ID: <20180619113729.3d1a4c0b@jabberwock.cb.piermont.com> References: <20180616204650.8423.73499@vcs0.savannah.gnu.org> <20180616204653.86AFC203CB@vcs0.savannah.gnu.org> <04e89d2beffedcc102b811863910c1ec.squirrel@dancol.org> <20180618115941.4f22a9d3@jabberwock.cb.piermont.com> <1de38eca2662563e9e08006c88a6d2e5.squirrel@dancol.org> <20180619094005.11465a87@jabberwock.cb.piermont.com> <20180619094442.41287e4b@jabberwock.cb.piermont.com> <20180619103002.4f000018@jabberwock.cb.piermont.com> <20180619103325.7d79befb@jabberwock.cb.piermont.com> <9a5f3904-8298-b5e3-cd97-b525f602cc63@dancol.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Trace: blaine.gmane.org 1529422538 16051 195.159.176.226 (19 Jun 2018 15:35:38 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 19 Jun 2018 15:35:38 +0000 (UTC) Cc: Stefan Monnier , emacs-devel@gnu.org To: Daniel Colascione Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Jun 19 17:35:33 2018 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fVIfN-00044W-On for ged-emacs-devel@m.gmane.org; Tue, 19 Jun 2018 17:35:33 +0200 Original-Received: from localhost ([::1]:43305 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fVIhT-0002gg-9p for ged-emacs-devel@m.gmane.org; Tue, 19 Jun 2018 11:37:43 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:33121) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fVIhK-0002gM-8c for emacs-devel@gnu.org; Tue, 19 Jun 2018 11:37:35 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fVIhH-0003sa-5m for emacs-devel@gnu.org; Tue, 19 Jun 2018 11:37:34 -0400 Original-Received: from hacklheber.piermont.com ([166.84.7.14]:58004) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fVIhH-0003sU-1H for emacs-devel@gnu.org; Tue, 19 Jun 2018 11:37:31 -0400 Original-Received: from snark.cb.piermont.com (localhost [127.0.0.1]) by hacklheber.piermont.com (Postfix) with ESMTP id 61AD019F; Tue, 19 Jun 2018 11:37:30 -0400 (EDT) Original-Received: from jabberwock.cb.piermont.com (jabberwock.cb.piermont.com [10.160.2.107]) by snark.cb.piermont.com (Postfix) with ESMTP id 362AB2DEC77; Tue, 19 Jun 2018 11:37:30 -0400 (EDT) In-Reply-To: <9a5f3904-8298-b5e3-cd97-b525f602cc63@dancol.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 166.84.7.14 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:226513 Archived-At: On Tue, 19 Jun 2018 07:48:28 -0700 Daniel Colascione wrote: > If we did want to adopt TRE, we'd have to add supports for > PCRE-like callouts for implementing Emacs-specific assertions. > (PCRE itself has the opposite problem: explicit support for > pluggable callouts, but no support for an iterator API.) Probably. > I'd also like to better understand the specific remaining > differences between POSIX regular expression semantics and what TRE > implements, whether this difference is intentional or not. The documentation is, I think, pretty good on this. > And I'd also like to understand how we can give the engine > Emacs-regex semantics instead of POSIX ones. (Very few people use > the POSIX mode of Emacs regex matching.) > > I'm also not sure how copyright assignment would work for > abandonware. I don't think we could get a copyright assignment. It would have to be maintained as a separate package that Emacs depended on. Perry -- Perry E. Metzger perry@piermont.com