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 44CFB19C0024 for ; Tue, 27 Oct 2015 20:34:01 +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 61BD5B5D853 for ; Tue, 27 Oct 2015 21:01:48 +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 425FF95241E for ; Tue, 27 Oct 2015 21:01:47 +0900 (JST) Received: from [221.186.184.76] (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 64DA1120487; Tue, 27 Oct 2015 21:01:46 +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 A0A0712046F for ; Tue, 27 Oct 2015 21:01:41 +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=mh0HlBV/APvzVMHBUakdLGHk3zM=; b=TMKpCgMoiIkXz/WFI1 yxLCc7GyMjXx7jsTrN/WnE2pZHmzT27g1Z4lPvZ3uNvukIOCciZ+47XZfd0qHIjS zJJ+lz2vjw8IKWH0r7SNSLuq0ijcH+Jjm/JkMEl7U0YnNcoI2EcevEgZ6D5vWcEy uh6YCTI56RucGMtQ1qXipS7Vg= Received: by filter0826p1mdw1.sendgrid.net with SMTP id filter0826p1mdw1.6949.562F679754 2015-10-27 12:01:27.930840803 +0000 UTC Received: from herokuapp.com (ec2-54-158-231-153.compute-1.amazonaws.com [54.158.231.153]) by ismtpd0005p1iad1.sendgrid.net (SG) with ESMTP id iaVIZtW8SKS7uzMaaVXl9g for ; Tue, 27 Oct 2015 12:01:28.020 +0000 (UTC) Date: Tue, 27 Oct 2015 12:01:27 +0000 From: mame@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: 45844 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 11537 X-Redmine-Issue-Author: hsbt X-Redmine-Issue-Assignee: matz X-Redmine-Sender: mame 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/Ymy4QrNMhiuLXJG8OTL2vJD1yS5GL1i+9JlVPjmTNCFUHF8P+KbYk1EqUp2fWH RlV1e3pLkWfC6DXdeDEbTtAcuySGSlMXCtZaHA7EtV0xbIyJdgLFPuotfXrHKoQce01xIeH1k783Xp 2be2B4kwy8MqH8hNwTyxYotzIhn15WTvvD1W X-ML-Name: ruby-core X-Mail-Count: 71216 Subject: [ruby-core:71216] [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 Yusuke Endoh. Rodrigo Rosenfeld Rosas wrote: > ~~~ > u ?.profile ?.thumbnails ?.large || default > ~~~ Consider a method `+`. `str.?+"foo"` causes no conflict, but `str ?.+"foo"` will be parsed as `str(?. + "foo")`. -- Yusuke Endoh ---------------------------------------- Feature #11537: Introduce "Safe navigation operator" https://bugs.ruby-lang.org/issues/11537#change-54596 * 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/