From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Andrei Alexandrescu Newsgroups: gmane.emacs.help Subject: Re: changing visuals of code in emacs Date: Sun, 12 Oct 2008 16:06:24 -0500 Organization: Computer Science & Engineering, U of Washington, Seattle Message-ID: References: <878wst1qvn.fsf@hubble.informatimago.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Trace: ger.gmane.org 1223871596 21289 80.91.229.12 (13 Oct 2008 04:19:56 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 13 Oct 2008 04:19:56 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Mon Oct 13 06:20:54 2008 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1KpEvM-0002b7-Vm for geh-help-gnu-emacs@m.gmane.org; Mon, 13 Oct 2008 06:20:53 +0200 Original-Received: from localhost ([127.0.0.1]:54491 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1KpEuI-0000CY-3v for geh-help-gnu-emacs@m.gmane.org; Mon, 13 Oct 2008 00:19:46 -0400 Original-Newsgroups: gnu.emacs.help Original-Path: news.stanford.edu!newsfeed.stanford.edu!bloom-beacon.mit.edu!micro-heart-of-gold.mit.edu!uw-beaver!news User-Agent: Thunderbird 2.0.0.17 (X11/20080925) In-Reply-To: <878wst1qvn.fsf@hubble.informatimago.com> X-Nntp-Posting-Host: 216.80.148.146 Original-Lines: 51 Original-Xref: news.stanford.edu gnu.emacs.help:163370 X-Mailman-Approved-At: Mon, 13 Oct 2008 00:18:00 -0400 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:58717 Archived-At: Pascal J. Bourguignon wrote: > Andrei Alexandrescu writes: > >> Hello, >> >> >> I'd like to change code visuals for the D programming language as >> follows. I'd like the construct: >> >> Symbol!(balanced_parens) >> >> to be visualized as: >> >> Symbol«balanced_parens» >> >> The chevrons should appear electrically when I type the closing >> ")". Note that balanced_parens could in turn nested use of "!()", as >> in A!(B!(C)), and they should all be paired using chevrons. The >> underlying file should not contain the chevrons, just the ASCII >> representation using "!(" and ")". >> >> I haven't done much elisp programming beyond the common .emacs >> configuration tricks, so I don't know where to start. A few searches >> suggested that overlays may be what I'm looking for... any ideas and >> pointers? Thank you. > > If you didn't ask for recursion, this could have be done with > font-locking. > > (font-lock-add-keywords nil > '(("\\(!(\\)[^()]*\\()\\)" > 0 (progn > (compose-region (match-beginning 1) (match-end 1) ?« 'decompose-region) > (compose-region (match-beginning 2) (match-end 2) ?» 'decompose-region) > nil)))) > > But since this uses regular expressions, it won't work for recursive > !(...). > > > You can still use compose-region, but you'll have to implement the > parsing yourself. Perhaps this could be hooked on the code doing the > parenthesis balancing? I think I'd be happy with a nonrecursive region to get my feet wet. How do I use your font-lock-add-keywords code? I added it to both my .emacs and my d-mode.el file, to no avail. Thank you, Andrei