From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: waterloo Newsgroups: gmane.emacs.help Subject: what is `self-typing' ? Date: Sat, 26 Dec 2009 15:53:47 +0800 Message-ID: <907065090912252353g40094175q1bec9f4062d82434@mail.gmail.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=0016e644cd96daa813047b9cf836 X-Trace: ger.gmane.org 1261814063 17605 80.91.229.12 (26 Dec 2009 07:54:23 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 26 Dec 2009 07:54:23 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sat Dec 26 08:54:17 2009 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 1NORTc-0001e0-VX for geh-help-gnu-emacs@m.gmane.org; Sat, 26 Dec 2009 08:54:17 +0100 Original-Received: from localhost ([127.0.0.1]:48881 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NORTc-0005F5-RM for geh-help-gnu-emacs@m.gmane.org; Sat, 26 Dec 2009 02:54:16 -0500 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1NORTE-0005F0-RD for help-gnu-emacs@gnu.org; Sat, 26 Dec 2009 02:53:52 -0500 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1NORTA-0005EY-8U for help-gnu-emacs@gnu.org; Sat, 26 Dec 2009 02:53:52 -0500 Original-Received: from [199.232.76.173] (port=58351 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NORTA-0005EV-37 for help-gnu-emacs@gnu.org; Sat, 26 Dec 2009 02:53:48 -0500 Original-Received: from mail-iw0-f188.google.com ([209.85.223.188]:45408) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1NORT9-0008N3-Pq for help-gnu-emacs@gnu.org; Sat, 26 Dec 2009 02:53:47 -0500 Original-Received: by iwn26 with SMTP id 26so5875254iwn.14 for ; Fri, 25 Dec 2009 23:53:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:date:message-id:subject :from:to:content-type; bh=iLASg3pk1T3EnEauo62JYvLqL3O6URyzCNHzDPFchv8=; b=alDcUmxWAwdPmYK5CRJ4sT6AK5UNqNn8F3nFMJvsoWLmoBiHxWF5rcyxrbKrOUXAHB DimZgqx1MAyHG4TNTvfOx2olUqqPHT01m93oYMM0PzMNevm/hKzKkyRhCOgcyoVdLbGV lSXCKCMMfUA7Lzxxmm3E0T/202qkyIP3a8xYc= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=EVigwTsf+Ke15XH8e0DINREAhTducxbLVhMwh/clb6ibu6fmdD6u5dCqVGX8UPSGrB MoQCrTr5RR0GA6jHSIVe9Arucxw76rV4SRYodmUKXyiXFU6eEX0Huqq5ekOHZBuprhF3 XcCu0bEQTf6H5Pd3OP960fsHiI0zhCedasrQ0= Original-Received: by 10.231.121.69 with SMTP id g5mr2844263ibr.44.1261814027036; Fri, 25 Dec 2009 23:53:47 -0800 (PST) X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6 (newer, 2) 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:70862 Archived-At: --0016e644cd96daa813047b9cf836 Content-Type: text/plain; charset=ISO-8859-1 I can not understand a para in Elisp manual : > Lisp is unlike many other languages in that its objects are > "self-typing": the primitive type of each object is implicit in the > object itself. For example, if an object is a vector, nothing can > treat it as a number; Lisp knows it is a vector, not a number. > What is `self-typing' ? thanks --0016e644cd96daa813047b9cf836 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable I can not understand a para in Elisp manual :
Lisp is unlike many other languages in that= its objects are
"self-typing": the primitive type of each object is implicit in t= he
object itself.=A0 For example, if an object is a vector, nothing can<= br>treat it as a number; Lisp knows it is a vector, not a number.

What is `self-typing' ? thanks
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