From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Ihor Radchenko Newsgroups: gmane.emacs.bugs Subject: bug#63225: Compiling regexp patterns (and REGEXP_CACHE_SIZE in search.c) Date: Thu, 04 May 2023 12:58:13 +0000 Message-ID: <875y98jlsq.fsf@localhost> References: <63882A45-BD02-40D5-92FA-70175267BA3B@acm.org> <874jou7lsf.fsf@localhost> <37EED5F9-F1FE-46B6-B4FA-0B268B945123@gmail.com> <87wn1qqvj0.fsf@localhost> <34F4849A-CB39-4C96-9CC1-11ED723706DA@gmail.com> <87wn1psqny.fsf@localhost> <6DAF37F9-B236-4C33-8E30-0FCA47CCBCC5@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="38061"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 63225@debbugs.gnu.org To: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu May 04 14:56:33 2023 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1puYVd-0009hi-EF for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 04 May 2023 14:56:33 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1puYVK-0008Cj-04; Thu, 04 May 2023 08:56:14 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1puYVF-0008CI-TW for bug-gnu-emacs@gnu.org; Thu, 04 May 2023 08:56:10 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1puYV7-0006nC-TX for bug-gnu-emacs@gnu.org; Thu, 04 May 2023 08:56:08 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1puYV7-0002t8-OA for bug-gnu-emacs@gnu.org; Thu, 04 May 2023 08:56:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Ihor Radchenko Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 04 May 2023 12:56:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 63225 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: patch Original-Received: via spool by 63225-submit@debbugs.gnu.org id=B63225.168320491010825 (code B ref 63225); Thu, 04 May 2023 12:56:01 +0000 Original-Received: (at 63225) by debbugs.gnu.org; 4 May 2023 12:55:10 +0000 Original-Received: from localhost ([127.0.0.1]:48798 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1puYUH-0002oV-FI for submit@debbugs.gnu.org; Thu, 04 May 2023 08:55:09 -0400 Original-Received: from mout01.posteo.de ([185.67.36.65]:37889) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1puYUF-0002nb-Ro for 63225@debbugs.gnu.org; Thu, 04 May 2023 08:55:08 -0400 Original-Received: from submission (posteo.de [185.67.36.169]) by mout01.posteo.de (Postfix) with ESMTPS id ADE2B2403CD for <63225@debbugs.gnu.org>; Thu, 4 May 2023 14:55:01 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1683204901; bh=/ICKVeAnMkZfkbdWTYlnhHqAn8ALp+Zs4befplYSwkk=; h=From:To:Cc:Subject:Date:From; b=FZfGOiBNbd0MLZxndErWvRBGaRPpgFqmyhRBf3cpUUjBxty42W5Kirob+EtGEmfxM z0GJn43N6tMohcGzlnuwI9qYhJ4CC+rWFd5Z/pDKGb2LGo9b/I9Mufp948cNwZXJc9 kylhjHYGa7gRuWOvL+NAdZ6Y7yXuCSmzxfCpuxFuSpvGYr7mLGSuqIPJmm4265gwim DHZUFFUjz3fNTABR99wTgkR2HEWK12JeCzvHv7VVWIpTOOD5m9BIinfS7I6zbhD3sv o6PcXBSfuebA1p5gtL/Wa9x1W7gPESXwjRnQAKAGRqtiiLkfJNHyslPfUHFFdtOF7B lQbRWsd4F9VZQ== Original-Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4QBv106kxQz6twC; Thu, 4 May 2023 14:55:00 +0200 (CEST) In-Reply-To: <6DAF37F9-B236-4C33-8E30-0FCA47CCBCC5@gmail.com> X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-mx.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:261013 Archived-At: Mattias Engdeg=C3=A5rd writes: >> Ideally, the compiler should do something similar to >> what https://www.colm.net/open-source/ragel/ does. > > Yes, constructing a DFA would be more realistic when it's less in danger = of being thrown away at any time. I tried to look closer into regex-emacs.c and I note that the regexp compiler basically generates a specialized bytecode to be executed by regexp matcher later. So, may the existing vector type be reused to store compiled regexp pattern objects? AFIU, pvec_type will need to have one more item and reader/printer will need to be modified for a specialized print representation. The compiled regexp itself will be stored as unibyte string, containing the instructions. This will also open a possibility to compile regexp patterns from Elisp, if necessary. --=20 Ihor Radchenko // yantar92, Org mode contributor, Learn more about Org mode at . Support Org development at , or support my work at