From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS4713 221.184.0.0/13 X-Spam-Status: No, score=-3.8 required=3.0 tests=AWL,BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from neon.ruby-lang.org (neon.ruby-lang.org [221.186.184.75]) by dcvr.yhbt.net (Postfix) with ESMTP id 6381A1F46C for ; Tue, 24 Dec 2019 17:35:25 +0000 (UTC) Received: from neon.ruby-lang.org (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id B5FB81209D4; Wed, 25 Dec 2019 02:35:08 +0900 (JST) Received: from o1678948x4.outbound-mail.sendgrid.net (o1678948x4.outbound-mail.sendgrid.net [167.89.48.4]) by neon.ruby-lang.org (Postfix) with ESMTPS id EC48C1209CC for ; Wed, 25 Dec 2019 02:35:06 +0900 (JST) Received: by filterdrecv-p3mdw1-56c97568b5-x47bm with SMTP id filterdrecv-p3mdw1-56c97568b5-x47bm-19-5E024C51-18 2019-12-24 17:35:13.210248756 +0000 UTC m=+665528.669118181 Received: from herokuapp.com (unknown [54.226.93.224]) by ismtpd0041p1iad2.sendgrid.net (SG) with ESMTP id yoItQxEFQLKDdoFMt1SkRA for ; Tue, 24 Dec 2019 17:35:13.150 +0000 (UTC) Date: Tue, 24 Dec 2019 17:35:13 +0000 (UTC) From: ko1@atdot.net Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 72118 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 15973 X-Redmine-Issue-Author: alanwu X-Redmine-Issue-Assignee: matz X-Redmine-Sender: ko1 X-Mailer: Redmine X-Redmine-Host: bugs.ruby-lang.org X-Redmine-Site: Ruby Issue Tracking System X-Auto-Response-Suppress: All Auto-Submitted: auto-generated X-SG-EID: =?us-ascii?Q?fVTMYOBjtdvXNcWwrscBhLsHItUXVK5L4mtnq0mdcRcwj71THqpG6s1SQDX4OZ?= =?us-ascii?Q?Sbjgnm+qQp6Q8v6p1qbbDviLO1KMApTUVZKfQw3?= =?us-ascii?Q?nUe+1lMNQn=2FtNFU1Ji3aZKWbxxFdzBwOKlw+bFa?= =?us-ascii?Q?uKSWYv8c5QZfhNcF=2FXrqbJMFnzM2DME9zsx=2Fv6I?= =?us-ascii?Q?wJEZ3eiG+FWLp4t1d7o=2FUH=2FWud3tiZprPxw=3D=3D?= To: ruby-core@ruby-lang.org X-ML-Name: ruby-core X-Mail-Count: 96459 Subject: [ruby-core:96459] [Ruby master Feature#15973] Let Kernel#lambda always return a lambda X-BeenThere: ruby-core@ruby-lang.org X-Mailman-Version: 2.1.15 Precedence: list Reply-To: Ruby developers List-Id: Ruby developers List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ruby-core-bounces@ruby-lang.org Sender: "ruby-core" Issue #15973 has been updated by ko1 (Koichi Sasada). This is one idea: how about to prohibit `lambda(&...)` creation? (block literal is always prohibited)? 3.0: deprecation warning and show 3.1 will raise exception. 3.1: raise exception for `lambda(&...)` same as `proc`. ---------------------------------------- Feature #15973: Let Kernel#lambda always return a lambda https://bugs.ruby-lang.org/issues/15973#change-83383 * Author: alanwu (Alan Wu) * Status: Assigned * Priority: Normal * Assignee: matz (Yukihiro Matsumoto) * Target version: 2.8 ---------------------------------------- When Kernel#lambda receives a Proc that is not a lambda, it returns it without modification. l propose to change `Kernel#lambda` so it always returns a lambda. Calling a method called lambda and having it do nothing in effect is not very intuitive. https://github.com/ruby/ruby/pull/2262 Judging from marcandre's investigation here: https://bugs.ruby-lang.org/issues/15620#note-1, changing the behavior should not cause much breakage, if any. This also happens to fix [Bug #15620] -- https://bugs.ruby-lang.org/