From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Pascal J. Bourguignon" Newsgroups: gmane.emacs.help Subject: Re: How to quote a list of functions? Date: Thu, 13 Aug 2015 06:20:12 +0200 Organization: Informatimago Message-ID: <87zj1vddkz.fsf@kuiper.lan.informatimago.com> References: <871tfdjqjx.fsf@mbork.pl> <877fp5b52v.fsf@nl106-137-147.student.uu.se> <8737zs7uq3.fsf@mbork.pl> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: ger.gmane.org 1439439925 15206 80.91.229.3 (13 Aug 2015 04:25:25 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 13 Aug 2015 04:25:25 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Thu Aug 13 06:25:22 2015 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 1ZPk4u-0004ok-KT for geh-help-gnu-emacs@m.gmane.org; Thu, 13 Aug 2015 06:25:20 +0200 Original-Received: from localhost ([::1]:40917 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZPk4t-0001n0-Qf for geh-help-gnu-emacs@m.gmane.org; Thu, 13 Aug 2015 00:25:19 -0400 Original-Path: usenet.stanford.edu!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 39 Original-X-Trace: individual.net IprSYrKuEYfZSsPxKfiRPAj7/l60im5PxgP84V+7+2R6Y0CsjD Cancel-Lock: sha1:NGZiNTcwZDNlMDNlOTAxOGRhOWNkN2E0NWJiNWZiMTdmYjhiYmEzMQ== sha1:R42RJZgA3LqlhyjwmNNzo/NUCo8= Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwAQMAAABtzGvEAAAABlBMVEUAAAD///+l2Z/dAAAA oElEQVR4nK3OsRHCMAwF0O8YQufUNIQRGIAja9CxSA55AxZgFO4coMgYrEDDQZWPIlNAjwq9 033pbOBPtbXuB6PKNBn5gZkhGa86Z4x2wE67O+06WxGD/HCOGR0deY3f9Ijwwt7rNGNf6Oac l/GuZTF1wFGKiYYHKSFAkjIo1b6sCYS1sVmFhhhahKQssRjRT90ITWUk6vvK3RsPGs+M1RuR mV+hO/VvFAAAAABJRU5ErkJggg== X-Accept-Language: fr, es, en User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) Original-Xref: usenet.stanford.edu gnu.emacs.help:214239 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:106523 Archived-At: Emanuel Berg writes: > Barry Margolin writes: > >>> And those are, besides checking if there is such >>> a function? >> >> Currently that's it, I think. I was just describing >> it in a more generic way. > > OK. So it should look like this: > > (put #'upcase-region 'disabled nil) > (put #'downcase-region 'disabled nil) > (put #'erase-buffer 'disabled nil) > (put #'suspend-frame 'disabled t ) Definitely not. The notion of type should still exist in the mind of the programmer, if not in the compiler! The first parameter of put is of type symbol (function x) returns an object of type function. While it's true that in emacs lisp, symbol is a subtype of function, the reverse is not true. Some functions are not symbols. Therefore, the Lyskoff Substitution Principle tells us that (put #'upcase-region 'disabled nil) is a gross error. It should be: (put 'upcase-region 'disabled nil) -- __Pascal Bourguignon__ http://www.informatimago.com/ “The factory of the future will have only two employees, a man and a dog. The man will be there to feed the dog. The dog will be there to keep the man from touching the equipment.” -- Carl Bass CEO Autodesk