From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Original-To: poffice@blade.nagaokaut.ac.jp Delivered-To: poffice@blade.nagaokaut.ac.jp Received: from kankan.nagaokaut.ac.jp (kankan.nagaokaut.ac.jp [133.44.2.24]) by blade.nagaokaut.ac.jp (Postfix) with ESMTP id C1D6719C0024 for ; Thu, 22 Oct 2015 08:06:19 +0900 (JST) Received: from voscc.nagaokaut.ac.jp (voscc.nagaokaut.ac.jp [133.44.1.100]) by kankan.nagaokaut.ac.jp (Postfix) with ESMTP id 203C9B5D83D for ; Thu, 22 Oct 2015 08:33:25 +0900 (JST) Received: from neon.ruby-lang.org (neon.ruby-lang.org [221.186.184.75]) by voscc.nagaokaut.ac.jp (Postfix) with ESMTP id 34149952439 for ; Thu, 22 Oct 2015 08:33:24 +0900 (JST) Received: from [221.186.184.76] (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id AC7D81204AB; Thu, 22 Oct 2015 08:33:22 +0900 (JST) X-Original-To: ruby-core@ruby-lang.org Delivered-To: ruby-core@ruby-lang.org Received: from o10.shared.sendgrid.net (o10.shared.sendgrid.net [173.193.132.135]) by neon.ruby-lang.org (Postfix) with ESMTPS id 02296120468 for ; Thu, 22 Oct 2015 08:33:18 +0900 (JST) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sendgrid.me; h=from:to:references:subject:mime-version:content-type:content-transfer-encoding:list-id; s=smtpapi; bh=aWjTH+ZgNDSUMLRA5cUBh9UJKgs=; b=ul747T9J1/TAqKLu7l uxjB6FUS8E+MHkw30DDL8TY5ZmH083EudSQ2QczX8jiCqTTSB9krE3JghomD9ahG e0J3+m6h8RtK1HeIgxqe6Jo48yIrnkCfJswOLrDmkrif9BrVgBKqDBitM/Gl1/H+ 40JXAidXQqn+wjCrYNzVruMYw= Received: by filter0839p1mdw1.sendgrid.net with SMTP id filter0839p1mdw1.26578.562820B642 2015-10-21 23:33:10.583650533 +0000 UTC Received: from herokuapp.com (ec2-54-159-237-194.compute-1.amazonaws.com [54.159.237.194]) by ismtpd0004p1iad1.sendgrid.net (SG) with ESMTP id svcO5zFuS_eQH66sjOSmJw for ; Wed, 21 Oct 2015 23:33:10.712 +0000 (UTC) Date: Wed, 21 Oct 2015 23:33:10 +0000 From: nobu@ruby-lang.org To: ruby-core@ruby-lang.org Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Redmine-MailingListIntegration-Message-Ids: 45765 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 11537 X-Redmine-Issue-Author: hsbt X-Redmine-Issue-Assignee: matz X-Redmine-Sender: nobu 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: ync6xU2WACa70kv/Ymy4QrNMhiuLXJG8OTL2vJD1yS7ZGy6hTapa2NclFV78+mXajUWWixx/UajGjA tlBweTf/S1wZa4DREo0/Y8M7b3blLuyiIDTUcLEgj4hQEEFYTsI/6OcYXGRPZGDryaumdCxZm6WsOV RCdPCMjoc71ErBb5qsCKyctQ3v6FFJ87g/pC X-ML-Name: ruby-core X-Mail-Count: 71137 Subject: [ruby-core:71137] [Ruby trunk - Feature #11537] Introduce "Safe navigation operator" 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: , Errors-To: ruby-core-bounces@ruby-lang.org Sender: "ruby-core" Issue #11537 has been updated by Nobuyoshi Nakada. Marc-Andre Lafortune wrote: > Just to be clear, this will check only for `nil`, right? I think so, and my implementation too. ---------------------------------------- Feature #11537: Introduce "Safe navigation operator" https://bugs.ruby-lang.org/issues/11537#change-54509 * Author: Hiroshi SHIBATA * Status: Open * Priority: Normal * Assignee: Yukihiro Matsumoto ---------------------------------------- I sometimes write following code with rails application: ```ruby u = User.find(id) if u && u.profile && u.profile.thumbnails && u.profiles.thumbnails.large ... ``` or ```ruby # Use ActiveSupport if u.try!(:profile).try!(:thumbnails).try!(:large) ... ``` I hope to write shortly above code. Groovy has above operator named "Safe navigation operator" with "`?.`" syntax. Ruby can't use "`?.`" operator. Can we use "`.?`" syntax. like this: ```ruby u = User.find(id) u.?profile.?thumbnails.?large ``` Matz. How do you think about this? -- https://bugs.ruby-lang.org/