From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: evaluating numbers Date: Tue, 28 Apr 2020 18:05:09 +0300 Message-ID: <83368n3b2y.fsf@gnu.org> References: <875zjw2emg.fsf@gmx.net> <618B38D9-CD34-4200-8CA1-1A6B0922A83A@traduction-libre.org> <871ruk2d3f.fsf@gmx.net> <3C929D7B-1C10-4713-9EDA-55C80FC36AD8@traduction-libre.org> <835zjvg385.fsf@gnu.org> <83sgmyd6rw.fsf@gnu.org> <835zjucwbz.fsf@gnu.org> <628A3663-BDD3-47C5-B4F4-E260FD900691@traduction-libre.org> <83o8xla50f.fsf@gnu.org> <831rua95mg.fsf@gnu.org> <4801DEB3-937A-4777-8E99-C2CA2234F8A0@traduction-libre.org> <83eeya5yl6.fsf@gnu.org> <83imnl2sxk.fsf@gnu.org> <164231EC-D3B8-455C-8C11-AF033FB48699@traduction-libre.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="97215"; mail-complaints-to="usenet@ciao.gmane.io" Cc: Richard Stallman , emacs-devel@gnu.org To: Jean-Christophe Helary Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Apr 28 17:10:12 2020 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1jTRsC-000PBm-8R for ged-emacs-devel@m.gmane-mx.org; Tue, 28 Apr 2020 17:10:12 +0200 Original-Received: from localhost ([::1]:34560 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jTRsB-0004QO-8F for ged-emacs-devel@m.gmane-mx.org; Tue, 28 Apr 2020 11:10:11 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:49754) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jTRnl-0006N2-2f for emacs-devel@gnu.org; Tue, 28 Apr 2020 11:09:23 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:60933) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jTRnk-0001gM-Nq; Tue, 28 Apr 2020 11:05:36 -0400 Original-Received: from [176.228.60.248] (port=4830 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1jTRnd-0005Pk-7k; Tue, 28 Apr 2020 11:05:29 -0400 In-Reply-To: <164231EC-D3B8-455C-8C11-AF033FB48699@traduction-libre.org> (message from Jean-Christophe Helary on Tue, 28 Apr 2020 23:52:48 +0900) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 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-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:248025 Archived-At: > From: Jean-Christophe Helary > Date: Tue, 28 Apr 2020 23:52:48 +0900 > > > The answer to "why" is "because that's how characters are > > implemented". The answer to "how" is "by interpreting the integer as > > character when the context requires that". > > I'm sorry to get back to this now, but I'm reading an introduction to C in French where I found: > > "Une des particularités du type char en C est qu’il peut être assimilé à un entier: tout objet de type char peut être utilisé dans une expression qui utilise des objets de type entier. Par exemple, si c est de type char, l’expression c + 1 est valide." > > Is that the reason why characters are integers in emacs lisp too ? If you are asking why this happened historically, then I don't know: I wasn't there. Maybe Richard can answer that.