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 560D619C0031 for ; Fri, 6 Nov 2015 07:32:51 +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 A71C4B5D894 for ; Fri, 6 Nov 2015 08:01:52 +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 BAFF718CC7B8 for ; Fri, 6 Nov 2015 08:01:52 +0900 (JST) Received: from [221.186.184.76] (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 9832112052E; Fri, 6 Nov 2015 08:01:50 +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 C0EFF1204E7 for ; Fri, 6 Nov 2015 08:01:46 +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=k9FdqZZfha10nArEz6iPD/yJMVA=; b=Z1YhEt+w5pIVpi49uB gN4rGbZQZa1ruagorW9OJ2k06tGh+h8yRPyuX1DQMy2JwBgz3keim9rwHZ80zdG7 gVWvm+7nACInjhDXvcyxq5YZHMPnVhroLvdXjcyY6T+kyrKguvaXykDXd1Lk9w0S qXzOrE9p30HGQcI/Kh9vqspbk= Received: by filter-475.sjc1.sendgrid.net with SMTP id filter-475.31785.563BDFD710 2015-11-05 23:01:43.166129036 +0000 UTC Received: from herokuapp.com (ec2-54-158-154-135.compute-1.amazonaws.com [54.158.154.135]) by ismtpd0005p1iad1.sendgrid.net (SG) with ESMTP id 4FqUzVY0Sramym3VQz8iUQ for ; Thu, 05 Nov 2015 23:01:43.163 +0000 (UTC) Date: Thu, 05 Nov 2015 23:01:43 +0000 From: tom.enebo@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: 46001 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 11537 X-Redmine-Issue-Author: hsbt X-Redmine-Issue-Assignee: matz X-Redmine-Sender: enebo 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/Ymy4QrNMhiuLXJG8OTL2vJD1yS7xDjO/CkoxCLI3Wjp8/NUrQA1k0WB5MhDUku RwQapS6PiRS9GLywhajS0yqySYo4c8giipQQzndKpd2pFruAcK2oxU6rEtgozUhnKqIyqUqqZa409E 5tG8Cqsn2eh89WU= X-ML-Name: ruby-core X-Mail-Count: 71360 Subject: [ruby-core:71360] [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 Thomas Enebo. How about '\'? We can pay homage to Windows file delimeter? a\b\c I just scanned lexer and I cannot think of a reason off the top of my head why not...what does \ mean? who knows...what for .? mean? I don't know that either. This suggestion is twice as efficient though since it only uses one character. -Tom ---------------------------------------- Feature #11537: Introduce "Safe navigation operator" https://bugs.ruby-lang.org/issues/11537#change-54725 * Author: Hiroshi SHIBATA * Status: Closed * 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/