From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: tomas@tuxteam.de Newsgroups: gmane.emacs.help Subject: Re: let-alist can't deal with the keys which includes spaces. Date: Tue, 20 Jul 2021 16:56:59 +0200 Message-ID: <20210720145659.GA14831@tuxteam.de> References: <20210720124903.GA9052@tuxteam.de> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="envbJBWh7q8WU6mo" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="13876"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mutt/1.5.21 (2010-09-15) Cc: help-gnu-emacs To: Hongyi Zhao Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Tue Jul 20 16:57:52 2021 Return-path: Envelope-to: geh-help-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 1m5rBw-0003RX-3A for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 20 Jul 2021 16:57:52 +0200 Original-Received: from localhost ([::1]:60120 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m5rBv-0001mb-2E for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 20 Jul 2021 10:57:51 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:47168) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m5rBF-0001l7-35 for help-gnu-emacs@gnu.org; Tue, 20 Jul 2021 10:57:09 -0400 Original-Received: from mail.tuxteam.de ([5.199.139.25]:33516) by eggs.gnu.org with esmtps (TLS1.2:DHE_RSA_AES_128_CBC_SHA1:128) (Exim 4.90_1) (envelope-from ) id 1m5rB8-00080e-CF for help-gnu-emacs@gnu.org; Tue, 20 Jul 2021 10:57:06 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=tuxteam.de; s=mail; h=In-Reply-To:Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date; bh=9F6u/r9Ok9+trk2ElWxbIMhORyPF68Zct5shO2ATdGc=; b=KHByTFKAo+MumJdx7nskGYY2cby7HpGKdFhXFvnBG8atcRd2YTVxZ8qHrl9/foYpDfuptTPkLtCp7EjPRMuQfO96DFAQ0AErkZJD8YbASMlSXyIW8eDIHUeWTI8AB+hWdLVlsu8wmvFTxwCIrrE4ika3jtqnOAoURfXse6RLs0GSCCWmFSaEy/EV1wgtU2Han85azFbpiHC+4SKJ5BwJcose9+LWUcXaNElgHhjg4ken0GrMZdPQgAzyuE5AQ0wLkSle9LNlC0mirnMjARSzQ1JfuDqM0rNzbwgaEN+gYrr0+TP3NtBxZm+LJNBkobThpvigtvVJXqbedmOnhAkkaQ==; Original-Received: from tomas by mail.tuxteam.de with local (Exim 4.80) (envelope-from ) id 1m5rB5-00041Z-RD; Tue, 20 Jul 2021 16:56:59 +0200 Content-Disposition: inline In-Reply-To: Received-SPF: pass client-ip=5.199.139.25; envelope-from=tomas@tuxteam.de; helo=mail.tuxteam.de X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:131877 Archived-At: --envbJBWh7q8WU6mo Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Jul 20, 2021 at 09:21:32PM +0800, Hongyi Zhao wrote: > On Tue, Jul 20, 2021 at 8:49 PM wrote: > > > > On Tue, Jul 20, 2021 at 07:12:14PM +0800, Hongyi Zhao wrote: > > > I adapted the examples given on > > > > > > to the following: > > > > > > ;;; > > > (setq colors '(("rose merry" . red) (lily (belladonna . yellow)))) > > > > > > (let-alist colors > > > (if (eq ."rose merry" 'red) > > > .lily.belladonna)) > > > ;;; > > > > > > When I try to evaluate the above code snippet, the following error is= triggered: > > > > It's not the space. It's the dot ".". This is wrong Lisp syntax: > > > > (eq ."rose merry" 'red) > > > > Also the dots in .lily.belladonna look strange. This will be the next > > syntax error. > > > > BTW., if you take the dot out, like so > > > > (eq "rose merry" 'red) >=20 > The dot syntax is described on > , > as follows: >=20 > Macro: let-alist alist body > > Creates a binding for each symbol used as keys the association list > alist [...] Oh -- thanks. Didn't know about `let-alist'. But if I read it correctly, the macro wants to have symbols as keys, not other types (like strings). Note the snippet of the doc quote above. This works for me: (setq colors '((rose . "red") (lily . "white") (sunflower . "yellow"))) (let-alist colors (format "a lily is %S\n" .lily)) =3D> a lily is "white" It seems `let-alist' gets horribly confused if it tries to build a variable binding from a string. Cheers - t --envbJBWh7q8WU6mo Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAmD25DsACgkQBcgs9XrR2kYUGQCfU2jrsdlzORyPp17YWgmufZBm kisAn2o6OV8YOKF5QzKJRnhNVDw8mAaY =xmLg -----END PGP SIGNATURE----- --envbJBWh7q8WU6mo--