From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: =?UTF-8?Q?Aur=C3=A9lien_Aptel?= Newsgroups: gmane.emacs.devel Subject: Why is Lisp_Object a struct? Date: Sun, 3 Feb 2013 19:41:34 +0100 Message-ID: NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Trace: ger.gmane.org 1359916900 28706 80.91.229.3 (3 Feb 2013 18:41:40 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 3 Feb 2013 18:41:40 +0000 (UTC) To: Emacs development discussions Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sun Feb 03 19:42:01 2013 Return-path: Envelope-to: ged-emacs-devel@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 1U24Vq-0006nn-M1 for ged-emacs-devel@m.gmane.org; Sun, 03 Feb 2013 19:41:58 +0100 Original-Received: from localhost ([::1]:59130 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1U24VY-0003Lw-AG for ged-emacs-devel@m.gmane.org; Sun, 03 Feb 2013 13:41:40 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:37768) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1U24VU-0003Lq-4w for emacs-devel@gnu.org; Sun, 03 Feb 2013 13:41:38 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1U24VT-0000zg-7c for emacs-devel@gnu.org; Sun, 03 Feb 2013 13:41:36 -0500 Original-Received: from mail-vc0-f176.google.com ([209.85.220.176]:41669) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1U24VT-0000zC-3K for emacs-devel@gnu.org; Sun, 03 Feb 2013 13:41:35 -0500 Original-Received: by mail-vc0-f176.google.com with SMTP id fy27so3444172vcb.21 for ; Sun, 03 Feb 2013 10:41:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:x-received:sender:date:x-google-sender-auth:message-id :subject:from:to:content-type; bh=/6X8qtNhh8e0kzRxIweRfne6+H1h6YydefzzqQ/91bU=; b=C9tItdpKtvffcn6AxyhAhaoknTiSMRFkzTzo0AOOBlxU7H4YCWIOI6ZSdD3SEUc+Ue Fm2dZSxwiPqyp5B/UhAeCrGZSkt9ZqkKyhRGvCg/rJ9qAnwJUw7+cq1EPyYgARqGH/rk 7CwITTF+uHj1dwXcyf17sheAjI3gvwFHCYykroPBzBqOUGg/SiiUtgUXovgyaCh88k/R dRjEsd8iAmeWifas8hPwKLbG/S/+/KTJ5v3Z001RXOgKsQNy507rFvtaNuCbKTG9+Q4G 3GB1x08AEmkIacbElr/DMBbVf0qFT2eRfxE+w2yAFo6O0aZFF7NuAvTVVVbW9eBCW3Yz /wMw== X-Received: by 10.52.31.197 with SMTP id c5mr2401817vdi.65.1359916894558; Sun, 03 Feb 2013 10:41:34 -0800 (PST) Original-Received: by 10.58.161.145 with HTTP; Sun, 3 Feb 2013 10:41:34 -0800 (PST) X-Google-Sender-Auth: 06oGUIMwu3pW-WjG4vVIpg2Yv4g X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 209.85.220.176 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:156809 Archived-At: Hi, I'm currently trying to write a guide/introduction to the Emacs core. I was reading lisp.h and I was wondering: Why can Lisp_Object be a struct? What is the purpose of the CHECK_LISP_OBJECT_TYPE define?