From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Thorsten Jolitz Newsgroups: gmane.emacs.help Subject: Is it valid to use the zero-byte "^@" in regexps? Date: Wed, 18 Jun 2014 11:14:06 +0200 Message-ID: <87sin2zijl.fsf@gmail.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1403082893 31142 80.91.229.3 (18 Jun 2014 09:14:53 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 18 Jun 2014 09:14:53 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Wed Jun 18 11:14:46 2014 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WxBx8-00044R-BJ for geh-help-gnu-emacs@m.gmane.org; Wed, 18 Jun 2014 11:14:46 +0200 Original-Received: from localhost ([::1]:56011 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WxBx7-00065g-Tb for geh-help-gnu-emacs@m.gmane.org; Wed, 18 Jun 2014 05:14:45 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:56667) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WxBwq-00064j-LG for help-gnu-emacs@gnu.org; Wed, 18 Jun 2014 05:14:37 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WxBwi-0004Mm-8k for help-gnu-emacs@gnu.org; Wed, 18 Jun 2014 05:14:28 -0400 Original-Received: from plane.gmane.org ([80.91.229.3]:34819) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WxBwi-0004Mi-2h for help-gnu-emacs@gnu.org; Wed, 18 Jun 2014 05:14:20 -0400 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1WxBwg-0003Zf-Hu for help-gnu-emacs@gnu.org; Wed, 18 Jun 2014 11:14:18 +0200 Original-Received: from e178189070.adsl.alicedsl.de ([85.178.189.70]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 18 Jun 2014 11:14:18 +0200 Original-Received: from tjolitz by e178189070.adsl.alicedsl.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 18 Jun 2014 11:14:18 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 31 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: e178189070.adsl.alicedsl.de User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) Cancel-Lock: sha1:VRLup5p+VUw1AUKKiIZqgG5dpsA= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 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-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:98324 Archived-At: Hi List, when matching multi-line text, using the negated zero-byte in a regexp is convenient to match *any* chararcter, since it should only appear in binary files not in text files. However, I sometimes get strange and a bit unpredictable results using this technique. To rule out a fundamental problem - is it valid to have the zero-byte (inserted with C-q C-@) appear in a regexp like this? ,-------------------------------------------------------- | "^#\\+begin_src[[:space:]]+emacs-lisp[^^@]*\n#\\+end_src" `-------------------------------------------------------- If so, this regexp should reliably match any ,----------------------- | #+begin_src emacs-lisp | [...] | #+end_src `----------------------- no matter whats inside the block, right? -- cheers, Thorsten