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 7B10317D4F4C for ; Sat, 19 Sep 2015 09:19:36 +0900 (JST) Received: from funfun.nagaokaut.ac.jp (funfun.nagaokaut.ac.jp [133.44.2.201]) by kankan.nagaokaut.ac.jp (Postfix) with ESMTP id D05E3B5D888 for ; Sat, 19 Sep 2015 09:42:24 +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 C9EF797A826 for ; Sat, 19 Sep 2015 09:42:25 +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 CD6D8952408 for ; Sat, 19 Sep 2015 09:42:24 +0900 (JST) Received: from [221.186.184.76] (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 96A9612069F; Sat, 19 Sep 2015 09:42:23 +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 AD272120604 for ; Sat, 19 Sep 2015 09:42:19 +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=khHJV2Q8kE26sAev4R6GNjLLCUc=; b=wLdPG0u2SkOBX5CrxR zo3Sy2w88nIiGvsKhHP0OrDEW4bMtya5FUxsZxrzzR1PJMw/HX7q0Pa68EDr3tPE YdR4MJMPbeqovf2gqFnqS1aBWnzZ3Bifc+fZx2HGNZjpkMjVYip/awV6bEL4gM6Z SIF9jz5SLlfdQMnLboxt7Ul3Y= Received: by filter0542p1mdw1.sendgrid.net with SMTP id filter0542p1mdw1.1886.55FCAF67A 2015-09-19 00:42:15.117377411 +0000 UTC Received: from herokuapp.com (ec2-54-166-39-162.compute-1.amazonaws.com [54.166.39.162]) by ismtpd0002p1iad1.sendgrid.net (SG) with ESMTP id fjYRvqL-SwmhNUhJtMqasA for ; Sat, 19 Sep 2015 00:42:15.030 +0000 (UTC) Date: Sat, 19 Sep 2015 00:42:14 +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: 45474 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/Ymy4QrNMhiuLXJG8OTL2vJD1yS6e2W1iubnqsWof8n9ajJ899z8r2wEWr4kuzj 4ith41TaswX7xmk5mENYXl9bEur7oKTV4Jx5SeDSUcXGLDwPfiJacpvPRnaIxJODe9oiwpCBI3VfNu c0AR0tTlmJUceAA= X-ML-Name: ruby-core X-Mail-Count: 70861 Subject: [ruby-core:70861] [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. Description updated ---------------------------------------- Feature #11537: Introduce "Safe navigation operator" https://bugs.ruby-lang.org/issues/11537#change-54241 * 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/