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 A5E8819C003E for ; Thu, 22 Oct 2015 04:02:21 +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 0A3B3B5D8D2 for ; Thu, 22 Oct 2015 04:29:26 +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 EABC1952447 for ; Thu, 22 Oct 2015 04:29:25 +0900 (JST) Received: from [221.186.184.76] (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 49F911204D4; Thu, 22 Oct 2015 04:29:23 +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 9848F120499 for ; Thu, 22 Oct 2015 04:29:19 +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=qA4OH0EWIf3sXmPouGn1K10hT/M=; b=RW/s7bldt4ZGhVc9Db h8fmLTCkkINboJcVgr/H8ZGBQxidm+4FyJ3jwU615bXt8oLPfgqAceQXW+EfFqnj FzRYg0+0PeV0vEfW4PQbIuZxDjyxZ1DyudGaiVgmkE4zvtU/TNEoLqaGVhA8DOPW TTxAWQNCUdiGs8lkD2BR0W8uM= Received: by filter0906p1mdw1.sendgrid.net with SMTP id filter0906p1mdw1.5952.5627E78967 2015-10-21 19:29:13.64118909 +0000 UTC Received: from herokuapp.com (ec2-54-158-34-39.compute-1.amazonaws.com [54.158.34.39]) by ismtpd0006p1iad1.sendgrid.net (SG) with ESMTP id q1lnFcFPTxO4uMkq7CwE_g for ; Wed, 21 Oct 2015 19:29:13.843 +0000 (UTC) Date: Wed, 21 Oct 2015 19:29:13 +0000 From: ruby-core@marc-andre.ca 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: 45763 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 11537 X-Redmine-Issue-Author: hsbt X-Redmine-Issue-Assignee: matz X-Redmine-Sender: marcandre 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/Ymy4QrNMhiuLXJG8OTL2vJD1yS5DHz+O1a5waS7sBKZiGGnqXahN82/2kERHeI JPUPTM8oafstCCEkWwn3eZsxCvEGXEjqV+mTJeJTvS+XqSjtw66mzAzwIeWPG0ossZeFbRbazmMzNI c0ZGwLLwal9PcFcgT5zk4TYFBGVdR05+8rSP X-SendGrid-Contentd-ID: {"test_id":"1445455756"} X-ML-Name: ruby-core X-Mail-Count: 71135 Subject: [ruby-core:71135] [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 Marc-Andre Lafortune. Great! Just to be clear, this will check only for `nil`, right? nil.?foo # => nil false.?foo # => NoMethodError ---------------------------------------- Feature #11537: Introduce "Safe navigation operator" https://bugs.ruby-lang.org/issues/11537#change-54507 * 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/