From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Vivien Kraus via General Guile related discussions Newsgroups: gmane.lisp.guile.user Subject: Pattern matching: what does (= f pat) do? Date: Tue, 10 Aug 2021 19:20:11 +0200 Message-ID: <871r712p4k.fsf@planete-kraus.eu> Reply-To: Vivien Kraus Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="37674"; mail-complaints-to="usenet@ciao.gmane.io" To: guile-user@gnu.org Original-X-From: guile-user-bounces+guile-user=m.gmane-mx.org@gnu.org Tue Aug 10 19:20:46 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 1mDVQj-0009YZ-Lw for guile-user@m.gmane-mx.org; Tue, 10 Aug 2021 19:20:45 +0200 Original-Received: from localhost ([::1]:47140 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mDVQi-0004Bj-38 for guile-user@m.gmane-mx.org; Tue, 10 Aug 2021 13:20:44 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:45354) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mDVQX-0004Bb-IB for guile-user@gnu.org; Tue, 10 Aug 2021 13:20:33 -0400 Original-Received: from planete-kraus.eu ([89.234.140.182]:50810) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_CHACHA20_POLY1305:256) (Exim 4.90_1) (envelope-from ) id 1mDVQV-00076n-2j for guile-user@gnu.org; Tue, 10 Aug 2021 13:20:33 -0400 Original-Received: from planete-kraus.eu (localhost.lan [127.0.0.1]) by planete-kraus.eu (OpenSMTPD) with ESMTP id 19267144 for ; Tue, 10 Aug 2021 17:20:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=planete-kraus.eu; h=from :to:subject:date:message-id:mime-version:content-type; s=*; bh=t 2ovk29XIM/48/swJDGBZ82fHKs=; b=UXi2yrcfHDbw3pqUhjZdXXFCWvUHQcoKx 9+gHumravy/LSr8d0e48+BY6R+9iVM5wyG6SWIu36F+VKr9Z+P1bLwFgp1YNXwR5 LqHfc56zvs3NzJofZ6ZVoloySK5i5dCZptBlzRGhgvwPojCXhQQwC/qkHPZoRQC6 t+PWfHGOKY= Original-Received: by planete-kraus.eu (OpenSMTPD) with ESMTPSA id a9ba0768 (TLSv1.3:AEAD-CHACHA20-POLY1305-SHA256:256:NO) for ; Tue, 10 Aug 2021 17:20:18 +0000 (UTC) Received-SPF: pass client-ip=89.234.140.182; envelope-from=vivien@planete-kraus.eu; helo=planete-kraus.eu 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, DKIM_INVALID=0.1, DKIM_SIGNED=0.1, SPF_HELO_PASS=-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:17677 Archived-At: Dear guile users, The pattern matching manual has a strange description for the (= f pat) pattern. It reads: (= field pat) a ``field'' of an object However, the next example shows how you can apply a function in field without having anything to do with a field of an object. Based on the given example, and some experiments on my part, I think that the description should be: (= f pat) applies f, and matches pat in the result Am I correct? Vivien