From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Alan Mackenzie Newsgroups: gmane.emacs.devel Subject: Re: M-w, then C-y. C-y inserts text properties that aren't on original. Date: Fri, 19 Feb 2010 12:24:19 +0000 Message-ID: <20100219122419.GA918@muc.de> References: <20100218202902.GE2671@muc.de> <838wapy3yo.fsf@gnu.org> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1266581836 13786 80.91.229.12 (19 Feb 2010 12:17:16 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 19 Feb 2010 12:17:16 +0000 (UTC) Cc: emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Feb 19 13:17:14 2010 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1NiRnF-0000CE-PR for ged-emacs-devel@m.gmane.org; Fri, 19 Feb 2010 13:17:14 +0100 Original-Received: from localhost ([127.0.0.1]:50754 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NiRnF-0000Ur-6D for ged-emacs-devel@m.gmane.org; Fri, 19 Feb 2010 07:17:13 -0500 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1NiRn9-0000TY-9h for emacs-devel@gnu.org; Fri, 19 Feb 2010 07:17:07 -0500 Original-Received: from [140.186.70.92] (port=50950 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NiRn8-0000Rv-7Y for emacs-devel@gnu.org; Fri, 19 Feb 2010 07:17:06 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1NiRn4-0005xv-UA for emacs-devel@gnu.org; Fri, 19 Feb 2010 07:17:06 -0500 Original-Received: from colin.muc.de ([193.149.48.1]:3340 helo=mail.muc.de) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1NiRn4-0005xe-IH for emacs-devel@gnu.org; Fri, 19 Feb 2010 07:17:02 -0500 Original-Received: (qmail 81122 invoked by uid 3782); 19 Feb 2010 12:17:01 -0000 Original-Received: from acm.muc.de (pD9E51B9F.dip.t-dialin.net [217.229.27.159]) by colin2.muc.de (tmda-ofmipd) with ESMTP; Fri, 19 Feb 2010 13:16:59 +0100 Original-Received: (qmail 965 invoked by uid 1000); 19 Feb 2010 12:24:19 -0000 Content-Disposition: inline In-Reply-To: <838wapy3yo.fsf@gnu.org> User-Agent: Mutt/1.5.9i X-Delivery-Agent: TMDA/1.1.5 (Fettercairn) X-Primary-Address: acm@muc.de X-detected-operating-system: by eggs.gnu.org: FreeBSD 4.6-4.9 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:121224 Archived-At: Hi, Eli, On Fri, Feb 19, 2010 at 11:22:55AM +0200, Eli Zaretskii wrote: > > Date: Thu, 18 Feb 2010 20:29:02 +0000 > > From: Alan Mackenzie > > In a C++ Mode buffer, I create a region containing a template-opener <, > > M-w it, then C-y it. > > The C-y puts a syntax-table property on the (copy of) the <, but this > > property didn't exist on the original. > > What _was_ on the original was a category property whose symbol had a > > syntax-table property. > > This is the root cause of bug 5570 (indentation messed up in C++). > > Would somebody please suggest the part of Emacs I should be looking at > > to debug this problem. > Can you please give a precise recipe, starting with "emacs -Q", for > reproducing the problem? I don't know enough about C++ Mode internals > to understand what you say. ######################################################################### emacs -Q (defvar propp-var nil) (put 'propp-var 'foo t) Create buffer "foo" and put a line of text (including NL) into it. (with-current-buffer "foo" (put-text-property 1 2 'category 'propp-var)) In foo: M-< ; goto BOB C- C-n M-w ; Copy L1 into the kill ring C-y ; Yank it as L2 M-< C-u C-x = ; Get details of char at BOB There are text properties here: category propp-var ; <============================== fontified t C-n C-u C-x = ; Get details of char at BOL 2 There are text properties here: fontified t foo t ; <============================== ######################################################################### Note that where the original "had" a 'foo property by indirection through the 'category, the copy has spuriously short-circuited the 'category indirection. > Thanks. -- Alan Mackenzie (Nuremberg, Germany).