From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Sameer Rahmani Newsgroups: gmane.emacs.devel Subject: Lisp Api and backward compatibility Date: Fri, 12 Apr 2019 21:09:54 +0100 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="201144"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Apr 12 22:10:42 2019 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hF2VV-000q8z-Ca for ged-emacs-devel@m.gmane.org; Fri, 12 Apr 2019 22:10:41 +0200 Original-Received: from localhost ([127.0.0.1]:42075 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hF2VT-0001b7-QC for ged-emacs-devel@m.gmane.org; Fri, 12 Apr 2019 16:10:39 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:38110) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hF2Un-0001aq-L3 for emacs-devel@gnu.org; Fri, 12 Apr 2019 16:09:58 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:39914) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hF2Un-0005rF-F0 for emacs-devel@gnu.org; Fri, 12 Apr 2019 16:09:57 -0400 Original-Received: from [46.7.100.2] (port=46222 helo=[192.168.0.165]) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.82) (envelope-from ) id 1hF2Ul-0005Jx-U6 for emacs-devel@gnu.org; Fri, 12 Apr 2019 16:09:56 -0400 Content-Language: en-US X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 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" Xref: news.gmane.org gmane.emacs.devel:235375 Archived-At: Hi folks, What should i consider before changing the signature of a function which is part of the public api of a library ? should I add the new argument as the last argument ? what do we usually do for backward compatibility ? Cheers Sameer