From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.help Subject: Re: Help with etags Date: Fri, 08 Dec 2017 12:28:33 +0200 Message-ID: <83shclwm26.fsf@gnu.org> References: <87lgih5o9w.fsf@gmail.com> NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1512728963 8748 195.159.176.226 (8 Dec 2017 10:29:23 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 8 Dec 2017 10:29:23 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Fri Dec 08 11:29:18 2017 Return-path: Envelope-to: geh-help-gnu-emacs@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 1eNFu9-00026T-Mg for geh-help-gnu-emacs@m.gmane.org; Fri, 08 Dec 2017 11:29:17 +0100 Original-Received: from localhost ([::1]:36418 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eNFuH-0001In-1r for geh-help-gnu-emacs@m.gmane.org; Fri, 08 Dec 2017 05:29:25 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:39662) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eNFtq-0001Ic-9Z for help-gnu-emacs@gnu.org; Fri, 08 Dec 2017 05:28:59 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eNFtn-0008UY-2M for help-gnu-emacs@gnu.org; Fri, 08 Dec 2017 05:28:58 -0500 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:55521) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eNFtm-0008UM-UF for help-gnu-emacs@gnu.org; Fri, 08 Dec 2017 05:28:54 -0500 Original-Received: from [176.228.60.248] (port=2749 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1eNFtm-0007iX-Ag for help-gnu-emacs@gnu.org; Fri, 08 Dec 2017 05:28:54 -0500 In-reply-to: <87lgih5o9w.fsf@gmail.com> (nyraghu27132@gmail.com) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:4830:134:3::e X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.org gmane.emacs.help:115305 Archived-At: > From: "N. Raghavendra" > Date: Tue, 05 Dec 2017 18:23:47 +0530 > > I tried the command > > etags --language=none --regex="/^[[:space:]]*Definition[[:space:]\n]+[[:space:]]*\([[:alnum:]_]+\)[[:space:]]*\n/\1/" Homotopies.v > > but am getting an empty tags table. This is because (a) you should drop the leading "^" in the regexp (the regexp is always used anchored, as described in the manual); and (b) you should use the 'm' modifier, because your regexp is multi-line (this is also in the manual). This works for me: etags --language=none --regex="/[[:space:]]*Definition[[:space:]\n]+[[:space:]]*\([[:alnum:]_]+\)[[:space:]]*\n/\1/m" Homotopies.v