From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Ivan Kanis Newsgroups: gmane.emacs.help Subject: defining a setter function with gv.el Date: Mon, 27 Aug 2012 07:56:12 +0200 Message-ID: <87ehmsyj2b.fsf@googlemail.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1346047004 3289 80.91.229.3 (27 Aug 2012 05:56:44 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 27 Aug 2012 05:56:44 +0000 (UTC) Cc: emacs help To: Stefan Monnier Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Mon Aug 27 07:56:43 2012 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 1T5sJU-0000ON-4L for geh-help-gnu-emacs@m.gmane.org; Mon, 27 Aug 2012 07:56:40 +0200 Original-Received: from localhost ([::1]:59020 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1T5sJS-0000aD-9l for geh-help-gnu-emacs@m.gmane.org; Mon, 27 Aug 2012 01:56:38 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:51180) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1T5sJH-0000Zt-LH for help-gnu-emacs@gnu.org; Mon, 27 Aug 2012 01:56:34 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1T5sJG-0008VJ-EW for help-gnu-emacs@gnu.org; Mon, 27 Aug 2012 01:56:27 -0400 Original-Received: from mail-we0-f169.google.com ([74.125.82.169]:47111) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1T5sJG-0008VA-80 for help-gnu-emacs@gnu.org; Mon, 27 Aug 2012 01:56:26 -0400 Original-Received: by weys10 with SMTP id s10so2367267wey.0 for ; Sun, 26 Aug 2012 22:56:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=20120113; h=from:to:subject:face:cc:date:message-id:user-agent:mime-version :content-type; bh=JxyyXtDxRnkjnbi8SRDdJKLFFqLyqtdJ/s6jF6dZ1s8=; b=XW6zTVeJhK0+8jwZSmQOz40lv4acHCmpDNpu2Qu4qq2cDpmc19wMo7WurikJ+sNAW8 AaHRm4nS+n7mFzmTKozM+EsXae01uNKlSp+bT1yFBK3DN7mCGArM7I2KuKSZ1Ur2mPmJ giiqtnXEcAktU65GjZW7uZUGbD9Tbdt4oiex2Tjk1Zdqmy2xNFyQ25oReSKGBqDdYZHC RM6dVsPFpr1BXgRqiD7Xnm86uRnZwELaHGZjcFGuLs1mkC1mu0BhN8eHT48U9iCeHsPz he6hH9xj6P0/mmpLIuVTkvGMLK1plgjUn6dkL4eKulNBunZsezOiajj1OSikPkK//fPD oc3w== Original-Received: by 10.180.91.228 with SMTP id ch4mr22915447wib.7.1346046983727; Sun, 26 Aug 2012 22:56:23 -0700 (PDT) Original-Received: from tao ([89.83.137.164]) by mx.google.com with ESMTPS id r9sm20079702wia.2.2012.08.26.22.56.17 (version=TLSv1/SSLv3 cipher=OTHER); Sun, 26 Aug 2012 22:56:22 -0700 (PDT) Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwBAMAAAClLOS0AAAAAXNSR0IArs4c6QAAAB5QTFRF IBkXUxMTOCwoTC4qcUY8iFxQmmper31txpaJ/v/8aKZ1oAAAAcVJREFUOMt100tu2zAQAFDCXnUZ oAcIqG68LZULVLQBbwuSiffm6AIRRyeotAySJoVu2+FPpJWWC3/4NKOZocSW/yxWfnJ2+Bdwzhj7 8gleWVy7DXC2rkMNr2V/zRbghXIwthf3VbIA9Ffc71vZCSFyCEsBggtNS8ludwvfmhYA0Vn9o4DP zMWxR7+cPWzAYFzwM0ModtdmcDbDS6i/hT7L+RZof5yCXGrYe5jn2YO6BYMjgY+51tCIAqHgBLwR pwLnGuRjAKyBJkuN4yd4U92uCY1vUr2D/c5b8DuxyQwfOHUeaLqDJhnkkuGXbB56h2C1IVBdgncc bBi6feroa9B6jUDojnQPQKupbyXyeeCE1oT7Oqrt+SnfY3mkiyGA/3AmD3H5g32CcBx6hY8pRkwJ 9PpcjRGobUfprFnhAa1vepwcgMOhwG+pdSgKHFU9HAvoAH6XUl7lDUCCq5Qb6GMbVm3Aj++qDYCt wdBc/YHgOFCmS3mjDMRcSE2qY4E3Q3PVIQRQmeodNH4QEbRUFZzW+VotzwX4yTcRTySOML1qjcE5 hTirVqDHkMAP0PjAywp3d18JZtqzvr9zDYD+GaSKtE6Zlr/DLPNFmOcvBAAAAABJRU5ErkJggg== User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.2.50 (gnu/linux) X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 74.125.82.169 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:86540 Archived-At: Stefan, I am very new to setf. I would like to write a function that provides a place for setf to work on an alist. It would be wonderful if the function also worked as a getter. (setq foo '((oak . tree))) (defun my-function (&optional value) (if value (?) (cdr (assoc 'oak tree)))) (my-function) => tree (my-function 'shrub) foo => '((oak . shrub)) gv.el seems to have what I need to implement the setf portion. It doesn't provide example and I couldn't find doc in the elisp info. Could you, pleas, help me? Take care, -- Ivan Kanis http://ivan.kanis.fr Success is counted sweetest By those who ne'er succeed. To comprehend a nectar Requires sorest need. -- Emily Dickinson