From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Lars Ingebrigtsen Newsgroups: gmane.emacs.devel Subject: Re: master 2bb0703 1/2: lisp/*.el: Force non-nil result to t, to match docstring Date: Thu, 17 Oct 2019 04:19:10 +0200 Message-ID: <871rvcnmg1.fsf@gnus.org> References: <20191017004602.22269.2935@vcs0.savannah.gnu.org> <20191017004604.866DF20BC2@vcs0.savannah.gnu.org> <875zkonpqm.fsf@gnus.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="243262"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) Cc: Emacs developers To: Juanma Barranquero Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Oct 17 04:19:42 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 (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1iKvO9-0011BD-DN for ged-emacs-devel@m.gmane.org; Thu, 17 Oct 2019 04:19:41 +0200 Original-Received: from localhost ([::1]:56362 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iKvO8-000383-2g for ged-emacs-devel@m.gmane.org; Wed, 16 Oct 2019 22:19:40 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:48612) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iKvNq-00036b-2L for emacs-devel@gnu.org; Wed, 16 Oct 2019 22:19:23 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iKvNo-00029o-4e for emacs-devel@gnu.org; Wed, 16 Oct 2019 22:19:21 -0400 Original-Received: from [80.91.231.51] (port=36944 helo=quimby.gnus.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iKvNm-000274-46 for emacs-devel@gnu.org; Wed, 16 Oct 2019 22:19:20 -0400 Original-Received: from cm-84.212.202.86.getinternet.no ([84.212.202.86] helo=marnie) by quimby.gnus.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1iKvNe-00041N-II; Thu, 17 Oct 2019 04:19:14 +0200 In-Reply-To: (Juanma Barranquero's message of "Thu, 17 Oct 2019 03:44:38 +0200") X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 80.91.231.51 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.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:241110 Archived-At: Juanma Barranquero writes: > On Thu, Oct 17, 2019 at 3:08 AM Lars Ingebrigtsen wrote: > >> Aren't these mostly doc string bugs, though? That is, the doc string >> says "t" instead of "non-nil"; it's a common bug. > > Depends. When the function is a predicate, t/nil makes more sense > (generally speaking, there are exceptions) that non-nil/nil. I thought it was kinda opposite: When it's a predicate, we only care about nil/non-nil. We only care about the distinction between non-nil and t when we have a function that can return many different values, and t has a special meaning among those values. -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no