From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail From: divoplade Newsgroups: gmane.lisp.guile.user Subject: Use of foreign objects to wrap anything other than an integer Date: Tue, 26 May 2020 00:04:18 +0200 Message-ID: <6e359810021ed654dd38e72017e07d5b4b88ba38.camel@divoplade.fr> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="83566"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Evolution 3.30.5-1.1 To: guile-user@gnu.org Original-X-From: guile-user-bounces+guile-user=m.gmane-mx.org@gnu.org Tue May 26 00:04:36 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 1jdLD2-000Ld3-EU for guile-user@m.gmane-mx.org; Tue, 26 May 2020 00:04:36 +0200 Original-Received: from localhost ([::1]:42248 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jdLD1-0004E4-Ei for guile-user@m.gmane-mx.org; Mon, 25 May 2020 18:04:35 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:39150) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jdLCr-0004D7-35 for guile-user@gnu.org; Mon, 25 May 2020 18:04:25 -0400 Original-Received: from relay12.mail.gandi.net ([217.70.178.232]:44985) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jdLCp-0005yh-M9 for guile-user@gnu.org; Mon, 25 May 2020 18:04:24 -0400 Original-Received: from gnou.home (lfbn-lyo-1-1672-217.w90-65.abo.wanadoo.fr [90.65.104.217]) (Authenticated sender: d@divoplade.fr) by relay12.mail.gandi.net (Postfix) with ESMTPSA id AFE1B200004 for ; Mon, 25 May 2020 22:04:19 +0000 (UTC) Received-SPF: pass client-ip=217.70.178.232; envelope-from=d@divoplade.fr; helo=relay12.mail.gandi.net X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/25 18:04:20 X-ACL-Warn: Detected OS = Linux 3.11 and newer X-Spam_score_int: -25 X-Spam_score: -2.6 X-Spam_bar: -- X-Spam_report: (-2.6 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN 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:16510 Archived-At: Hello, How do I use the foreign object type? When I do: (use-modules (system foreign-object)) (use-modules (oop goops)) (define-foreign-object-type make-thing (x) #:finalizer (lambda (x) #t)) (make-thing "hello") I get: ERROR: In procedure struct-set!/unboxed: Wrong type (expecting exact integer): "hello" I thought it might be some kind of a bug, but it is the same thing for 3.0.2, 2.2.7 and 2.2.4 (guix) and 2.2.4 (debian). 2.2 is the first to introduce the foreign objects. How should I do it? divoplade