From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: if-let/if-let*/and-let/.. Date: Tue, 13 Feb 2018 14:24:08 -0500 Message-ID: References: <87wozijhpk.fsf@web.de> <87mv0crbp3.fsf@web.de> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1518549828 24612 195.159.176.226 (13 Feb 2018 19:23:48 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 13 Feb 2018 19:23:48 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Feb 13 20:23:44 2018 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1elgAq-0005Bx-3W for ged-emacs-devel@m.gmane.org; Tue, 13 Feb 2018 20:23:28 +0100 Original-Received: from localhost ([::1]:41254 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1elgCr-00041f-Rt for ged-emacs-devel@m.gmane.org; Tue, 13 Feb 2018 14:25:33 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:38791) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1elgCl-00041K-94 for emacs-devel@gnu.org; Tue, 13 Feb 2018 14:25:28 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1elgCi-0006NL-3z for emacs-devel@gnu.org; Tue, 13 Feb 2018 14:25:27 -0500 Original-Received: from [195.159.176.226] (port=46296 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1elgCh-0006M9-TI for emacs-devel@gnu.org; Tue, 13 Feb 2018 14:25:24 -0500 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1elgA3-0002WR-6U for emacs-devel@gnu.org; Tue, 13 Feb 2018 20:22:39 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 24 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:DpmusD1t3cnyudTDdpBI5k8EaDc= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 195.159.176.226 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:222717 Archived-At: > I think it is worth it, for the same reason we keep having `when' though > we have `if' or `and': to make code better readable and its intention > better understandable. I was OK with having if-let and when-let, yes. I think more than 2 alternative semantics is hard to justify, tho: I don't even see a single use of and-let (other than in tests). >> > Another question is why aren't when-let and when-let* aliases of >> > each other? Currently we have 5 variants (2 of which are >> > deprecated) each with very slightly different semantics. > That makes no sense, indeed. Would keeping both names as aliases be ok > to you? Yes. > So, what are your suggestions? I think we should drop `and-let` and make if/when-let aliases of if/when-let* (or the reverse). I think it could still be done on emacs-26. Stefan