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 6512319C0024 for ; Tue, 27 Oct 2015 20:39:42 +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 87C93B5D853 for ; Tue, 27 Oct 2015 21:07:29 +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 693DB952408 for ; Tue, 27 Oct 2015 21:07:29 +0900 (JST) Received: from [221.186.184.76] (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id CA9A412049A; Tue, 27 Oct 2015 21:07:24 +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 94C5912046F for ; Tue, 27 Oct 2015 21:07:20 +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=1W2idza6nRS45i4MoC/jymqexdw=; b=tFx74jrRDxdI6PE9iR iLBJpFFi0iWzEJDLqg6eJ/iSl7lDBsd+ayJ3jbBhkDL9Ht81CaIlYS2LywFPmQgp R6EDAEbWL601o73G2AtXwH9DY1ueOSJHKJM3L41BOdxgR45Qpy79AJrp+0jUEl/I 1GPDpMGUrHabFaCjwKZ6PB4xM= Received: by filter0449p1mdw1.sendgrid.net with SMTP id filter0449p1mdw1.32669.562F68ED2C 2015-10-27 12:07:09.585162388 +0000 UTC Received: from herokuapp.com (ec2-54-198-211-40.compute-1.amazonaws.com [54.198.211.40]) by ismtpd0001p1iad1.sendgrid.net (SG) with ESMTP id HxGew9WhQ6eK4bLSo1mOmQ for ; Tue, 27 Oct 2015 12:07:09.531 +0000 (UTC) Date: Tue, 27 Oct 2015 12:07:09 +0000 From: rr.rosas@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: 45845 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 11537 X-Redmine-Issue-Author: hsbt X-Redmine-Issue-Assignee: matz X-Redmine-Sender: rosenfeld 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/Ymy4QrNMhiuLXJG8OTL2vJD1yS5gU8iYmra8ojZVZcPsWxYzcwyYx0+hzUrM5z P132aI2O63UiM7Nfj4t6G6p0pIoDA6cDKiRX+yOuQM09PAnAoLuNib7mZHoV1/F4oKH0iP5f7wSrAm eueYSduYqhccYLSJPUjEu5O8GY8eTq18MEI3 X-ML-Name: ruby-core X-Mail-Count: 71217 Subject: [ruby-core:71217] [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 Rodrigo Rosenfeld Rosas. I believe you are referring to implementation details and in this case I can't really opinionate, but with regards to syntax, since "?." is not a valid code, it should be interpreted as "?.+" and "foo" would be parsed as its argument. But if this is too complicate to implement, I'm also fine with using ".?". ---------------------------------------- Feature #11537: Introduce "Safe navigation operator" https://bugs.ruby-lang.org/issues/11537#change-54597 * 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/