From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: "Basil L. Contovounesios" Newsgroups: gmane.emacs.bugs Subject: bug#47368: 28.0.50; map-elt returns nil without "deprecated" TESTFN Date: Fri, 26 Mar 2021 18:58:44 +0000 Message-ID: <87pmzlzqqj.fsf@tcd.ie> References: <87sg4kyw1q.fsf@tcd.ie> <87lfacvtwt.fsf@web.de> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="27611"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: dalanicolai , 47368@debbugs.gnu.org To: Michael Heerdegen Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri Mar 26 20:00:12 2021 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1lPrgp-00074Q-KI for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 26 Mar 2021 20:00:11 +0100 Original-Received: from localhost ([::1]:57896 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lPrgo-000341-Dl for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 26 Mar 2021 15:00:10 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:43198) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lPrgg-00033s-DG for bug-gnu-emacs@gnu.org; Fri, 26 Mar 2021 15:00:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:59184) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lPrgg-0003xd-3n for bug-gnu-emacs@gnu.org; Fri, 26 Mar 2021 15:00:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1lPrgg-00066r-1v for bug-gnu-emacs@gnu.org; Fri, 26 Mar 2021 15:00:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: "Basil L. 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Contovounesios" writes: > >> dalanicolai writes: >> >> > The docstring of the map-elt function from the map.el package (version >> > 3.0) mentions that TESTFN is deprecated because "its default depends on >> > the MAP argument". However when I try e.g. >> > >> > (map-elt '(("A1" . 3)) "A1") >> > >> > it returns nil. >> >> This is expected, as alist keys are tested with eq by default. >> >> That's what the docstring is trying to warn about: alists default to >> testing with eq, but can also use eql, equal, or anything else. > > Is it that obvious? We have `assoc' and `assq' built-in - to me it's > not obvious that "alist keys are tested with eq by default". It's the > default for `alist-get', ok, which is used by the implementation, but > not everybody will know that. I would add a sentence about that. There used to be such a sentence until the argument was deprecated. I agree that whatever we decide on should be made clear. -- Basil