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 629CF19A0AD1 for ; Fri, 18 Sep 2015 18:06:35 +0900 (JST) Received: from funfun.nagaokaut.ac.jp (smtp.nagaokaut.ac.jp [133.44.2.201]) by kankan.nagaokaut.ac.jp (Postfix) with ESMTP id 1EDF5B5D8C5 for ; Fri, 18 Sep 2015 18:29:18 +0900 (JST) Received: from voscc.nagaokaut.ac.jp (voscc.nagaokaut.ac.jp [133.44.1.100]) by funfun.nagaokaut.ac.jp (Postfix) with ESMTP id 34E8597A838 for ; Fri, 18 Sep 2015 18:29:20 +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 208F6952439 for ; Fri, 18 Sep 2015 18:29:17 +0900 (JST) Received: from [221.186.184.76] (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 254451207C7; Fri, 18 Sep 2015 18:29:17 +0900 (JST) X-Original-To: ruby-core@ruby-lang.org Delivered-To: ruby-core@ruby-lang.org Received: from o2.heroku.sendgrid.net (o2.heroku.sendgrid.net [67.228.50.55]) by neon.ruby-lang.org (Postfix) with ESMTPS id DBD1B120686 for ; Fri, 18 Sep 2015 18:29:13 +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=TgRt3KeNwhkKlntZGDLBmEd8SZ4=; b=Yax1dnm/ebxdT3aZnK RW6rRjlr2JUG/70/g3CxV4haSM0+15GBlTNog2ES3n7DzuzCmqz5zrwRjbDAHDCl APj7qbb+pa9pOMcdj2Gf1cdvvKXoA6JboUC/UOOsg+h34u3j3E3g6PbUGNKJQkDE fOMowgQM+oB+Fif6V3VAk/yVU= Received: by filter0444p1mdw1.sendgrid.net with SMTP id filter0444p1mdw1.11265.55FBD9665 2015-09-18 09:29:10.193370718 +0000 UTC Received: from herokuapp.com (ec2-54-211-4-163.compute-1.amazonaws.com [54.211.4.163]) by ismtpd0002p1iad1.sendgrid.net (SG) with ESMTP id 0QOIKo5LSZKjkldWUioMyA for ; Fri, 18 Sep 2015 09:29:10.281 +0000 (UTC) Date: Fri, 18 Sep 2015 09:29:10 +0000 From: shibata.hiroshi@gmail.com 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: 45466 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 11537 X-Redmine-Issue-Author: hsbt X-Redmine-Issue-Assignee: matz X-Redmine-Sender: hsbt 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/Ymy4QrNMhiuLXJG8OTL2vJD1yS7jQTHdp/H47oKgPOaqrErgQZGlyHbR64mWlb 03nS7xRrfBOXGTCH0CEZT8wcqXSq+Q5FIeg/JvXgZTik2mK0AakFGpFHtM/vbnF577JAbhpdQ8gOYC KF1mFNxmCPN+xgttOUDe9IiojpUUUgrkCZZo X-ML-Name: ruby-core X-Mail-Count: 70854 Subject: [ruby-core:70854] [Ruby trunk - Feature #11537] [Open] 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 reported by Hiroshi SHIBATA. ---------------------------------------- Feature #11537: Introduce "Safe navigation operator" https://bugs.ruby-lang.org/issues/11537 * Author: Hiroshi SHIBATA * Status: Open * Priority: Normal * Assignee: Yukihiro Matsumoto ---------------------------------------- I somtimes write following code with rails application: ```rb u = User.find(id) if u && u.profile && u.profile.thumbnails && u.profiles.thumbnails.large ... ``` or ```rb # 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: ```rb u = User.find(id) u.?profile.?thumbnails.?large ``` Matz. How do you think about this? -- https://bugs.ruby-lang.org/