From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: Enhancement suggestion: prin1 extension mechanism Date: Sat, 13 Sep 2008 15:22:20 -0400 Message-ID: References: <200809110325.m8B3PYFE031034@projectile.siege-engine.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1221333758 30807 80.91.229.12 (13 Sep 2008 19:22:38 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 13 Sep 2008 19:22:38 +0000 (UTC) Cc: emacs-devel@gnu.org To: Helmut Eller Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat Sep 13 21:23:33 2008 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 4.50) id 1KeaiQ-0007jy-SS for ged-emacs-devel@m.gmane.org; Sat, 13 Sep 2008 21:23:31 +0200 Original-Received: from localhost ([127.0.0.1]:59203 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1KeahQ-0002qH-9k for ged-emacs-devel@m.gmane.org; Sat, 13 Sep 2008 15:22:28 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1KeahL-0002nN-St for emacs-devel@gnu.org; Sat, 13 Sep 2008 15:22:23 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1KeahK-0002ix-7D for emacs-devel@gnu.org; Sat, 13 Sep 2008 15:22:23 -0400 Original-Received: from [199.232.76.173] (port=53992 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1KeahJ-0002ii-T6 for emacs-devel@gnu.org; Sat, 13 Sep 2008 15:22:21 -0400 Original-Received: from ironport2-out.pppoe.ca ([206.248.154.182]:25120 helo=ironport2-out.teksavvy.com) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1KeahJ-0003Dv-P7 for emacs-devel@gnu.org; Sat, 13 Sep 2008 15:22:21 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ApsEAHqvy0hFxIqP/2dsb2JhbACBY7IVgWSBBg X-IronPort-AV: E=Sophos;i="4.32,394,1217822400"; d="scan'208";a="26781496" Original-Received: from 69-196-138-143.dsl.teksavvy.com (HELO pastel.home) ([69.196.138.143]) by ironport2-out.teksavvy.com with ESMTP; 13 Sep 2008 15:22:20 -0400 Original-Received: by pastel.home (Postfix, from userid 20848) id 4B1828136; Sat, 13 Sep 2008 15:22:20 -0400 (EDT) In-Reply-To: (Helmut Eller's message of "Sat, 13 Sep 2008 13:13:45 +0200") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (gnu/linux) X-detected-operating-system: by monty-python.gnu.org: Genre and OS details not recognized. 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:103872 Archived-At: > Instead of changing the internal representation, you could allow entries > for vector and cons etc. in the printer table. That's how Common Lisp > allows you to customize the printer for built-in types. I fear it'd be difficult to make it work without incurring a significant performance overhead. Stefan