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 D8C7919C0021 for ; Wed, 21 Oct 2015 16:19:09 +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 67273B5D8BC for ; Wed, 21 Oct 2015 16:46:09 +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 3BDCF952408 for ; Wed, 21 Oct 2015 16:46:09 +0900 (JST) Received: from [221.186.184.76] (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id D2EA1120491; Wed, 21 Oct 2015 16:46:06 +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 81396120452 for ; Wed, 21 Oct 2015 16:46:03 +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=KVVX7eC7DBykKLJspIhEtlxhnC4=; b=v2Rfo7wtX0KuCb09oo beBCb7xR3O4qOe2Exa6ixo/t0qWkUn3HAGIIQ3kCpElIRDBBmnO7b2VNozCaxpo+ OTZOME6gZWB3OkoBnPdDvXV+YJYhfg8a/gu1VUR2tXfFl03rhMjlCZSo0IDIeLH/ NB3w+iZUQ0GiAYW1+wVxZ7F1U= Received: by filter0569p1mdw1.sendgrid.net with SMTP id filter0569p1mdw1.10080.562742B557 2015-10-21 07:45:57.762399013 +0000 UTC Received: from herokuapp.com (ec2-54-87-121-244.compute-1.amazonaws.com [54.87.121.244]) by ismtpd0005p1iad1.sendgrid.net (SG) with ESMTP id ZgqwbfB5Q8yZENNFpqQhcg for ; Wed, 21 Oct 2015 07:45:57.799 +0000 (UTC) Date: Wed, 21 Oct 2015 07:45:57 +0000 From: matz@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: 45757 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 11537 X-Redmine-Issue-Author: hsbt X-Redmine-Issue-Assignee: matz X-Redmine-Sender: matz 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/Ymy4QrNMhiuLXJG8OTL2vJD1yS7SHG8Xcmz2SHXZ4t0k9zi6GP9KKB7ZbnOTbl pR7PGAco+zur5s1McsfXYvov+KeY736wfqlJvZF3ERxQIxlDIgU1ZQsQmN7FqO/yUAU8xprf94Mq7Y 467pZGd/KKzzAqaC7B6ITI/5SOXQ7iZshPxa X-ML-Name: ruby-core X-Mail-Count: 71129 Subject: [ruby-core:71129] [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 Yukihiro Matsumoto. In several languages (Groovy Swift etc.), use `?.` but we cannot use it in Ruby, because `foo?` is a valid method name. Thus `?.` is a reasonable alternative for Ruby, I think. Accepted. Matz. ---------------------------------------- Feature #11537: Introduce "Safe navigation operator" https://bugs.ruby-lang.org/issues/11537#change-54500 * 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/