From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: =?utf-8?Q?Ludovic_Court=C3=A8s?= Newsgroups: gmane.lisp.guile.user Subject: Re: Unbound variable warning/exception Date: Sun, 20 Dec 2020 22:36:29 +0100 Message-ID: <878s9s88iq.fsf@gnu.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="14043"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) To: guile-user@gnu.org Cancel-Lock: sha1:97JTgMhUQ2Q3W5hh95zQ/hDYAAo= Original-X-From: guile-user-bounces+guile-user=m.gmane-mx.org@gnu.org Sun Dec 20 22:36:50 2020 Return-path: Envelope-to: guile-user@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 1kr6Nk-0003YA-OS for guile-user@m.gmane-mx.org; Sun, 20 Dec 2020 22:36:48 +0100 Original-Received: from localhost ([::1]:60944 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kr6Nj-0000dz-QX for guile-user@m.gmane-mx.org; Sun, 20 Dec 2020 16:36:47 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:34954) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kr6Nb-0000dt-3U for guile-user@gnu.org; Sun, 20 Dec 2020 16:36:39 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]:55680) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kr6NZ-000591-I1 for guile-user@gnu.org; Sun, 20 Dec 2020 16:36:38 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1kr6NW-0003K0-9I for guile-user@gnu.org; Sun, 20 Dec 2020 22:36:34 +0100 X-Injected-Via-Gmane: http://gmane.org/ X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 30 Frimaire an 229 de la =?utf-8?Q?R=C3=A9volution?= X-PGP-Key-ID: 0x090B11993D9AEBB5 X-PGP-Key: http://www.fdn.fr/~lcourtes/ludovic.asc X-PGP-Fingerprint: 3CE4 6455 8A84 FDC6 9DB4 0CFB 090B 1199 3D9A EBB5 X-OS: x86_64-pc-linux-gnu Received-SPF: pass client-ip=116.202.254.214; envelope-from=guile-user@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: guile-user@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: General Guile related discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guile-user-bounces+guile-user=m.gmane-mx.org@gnu.org Original-Sender: "guile-user" Xref: news.gmane.io gmane.lisp.guile.user:17095 Archived-At: Hi, Aleix Conchillo Flaqué skribis: > On Fri, Dec 18, 2020 at 5:26 PM Christopher Lam > wrote: >> >> Hi guilers, I saw in guix the incredibly useful unbound-variable exception >> printer written by Ludovic. I've adapted for use in gnucash as >> https://github.com/Gnucash/gnucash/commit/6f951784 -- there are now in >> guile 3.0.4 many more unbound-var warnings than in 3.0.2 -- wouldn't it be >> a useful hint to add to the warning in core guile as well? > > Wow, this is great! > > This should definitely be added to guile by default. In Guix, the hint is displayed by an 'unbound-variable exception handler, not by the 'unbound-variable printer; I think doing it in the printer could be confusing. Perhaps what could be done is export an 'unbound-variable handler that does all this, and have the REPL use it? Thanks, Ludo’.