From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: olivier.dion--- via General Guile related discussions Newsgroups: gmane.lisp.guile.user Subject: Re: no scm_foreign_object_p ? Date: Sat, 23 Jan 2021 14:29:13 -0500 Message-ID: <87zh0zfo52.fsf@clara> References: <87f7e2c4-3a42-acdf-35cf-6920b6240444@gmail.com> Reply-To: Olivier Dion Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="23836"; mail-complaints-to="usenet@ciao.gmane.io" To: Matt Wette , Guile User Original-X-From: guile-user-bounces+guile-user=m.gmane-mx.org@gnu.org Sat Jan 23 20:29:34 2021 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 1l3ObF-000689-KC for guile-user@m.gmane-mx.org; Sat, 23 Jan 2021 20:29:33 +0100 Original-Received: from localhost ([::1]:35508 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l3ObE-00070J-FX for guile-user@m.gmane-mx.org; Sat, 23 Jan 2021 14:29:32 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:56930) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l3Ob4-0006yv-Co for guile-user@gnu.org; Sat, 23 Jan 2021 14:29:22 -0500 Original-Received: from smtp.polymtl.ca ([132.207.4.11]:54940) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l3Ob2-0000ET-C0 for guile-user@gnu.org; Sat, 23 Jan 2021 14:29:21 -0500 Original-Received: from localhost ([91.193.4.204]) by smtp.polymtl.ca (8.14.7/8.14.7) with ESMTP id 10NJT6sA029771 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 23 Jan 2021 14:29:12 -0500 DKIM-Filter: OpenDKIM Filter v2.11.0 smtp.polymtl.ca 10NJT6sA029771 In-Reply-To: <87f7e2c4-3a42-acdf-35cf-6920b6240444@gmail.com> X-Poly-FromMTA: ([91.193.4.204]) at Sat, 23 Jan 2021 19:29:06 +0000 Received-SPF: pass client-ip=132.207.4.11; envelope-from=olivier.dion@polymtl.ca; helo=smtp.polymtl.ca X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham 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:17188 Archived-At: On Sat, 23 Jan 2021, Matt Wette wrote: > I started using foreign objects but want something akin to number?, > string? etc. > Is there something that works here? > I was hoping to see scm_foreign_object_p(type, object). The only thing I see in the manual is `scm_assert_foreign_object_type`. For something equivalent in scheme, I guess you could do something like: ---------------------------------------------------------------------- (define (foreign? obj) (not (or (number? obj) (string? obj) (null? obj) ;; and so on.. ))) ---------------------------------------------------------------------- I agree that such predicate should be part of the buitlin API. -- Olivier Dion PolyMtl