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 A5A1217CC585 for ; Mon, 24 Dec 2012 11:17:56 +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 61C0BEA6B8D for ; Mon, 24 Dec 2012 11:10:31 +0900 (JST) Received: from funfun.nagaokaut.ac.jp (localhost.nagaokaut.ac.jp [127.0.0.1]) by funfun.nagaokaut.ac.jp (Postfix) with ESMTP id 3CBA997A839 for ; Mon, 24 Dec 2012 11:10:31 +0900 (JST) X-Virus-Scanned: amavisd-new at nagaokaut.ac.jp Received: from funfun.nagaokaut.ac.jp ([127.0.0.1]) by funfun.nagaokaut.ac.jp (funfun.nagaokaut.ac.jp [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id sLroXwYMKMnq for ; Mon, 24 Dec 2012 11:10:31 +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 1B9E497A836 for ; Mon, 24 Dec 2012 11:10:31 +0900 (JST) Received: from carbon.ruby-lang.org (carbon.ruby-lang.org [221.186.184.68]) by voscc.nagaokaut.ac.jp (Postfix) with ESMTP id CD7CD952435 for ; Mon, 24 Dec 2012 11:10:29 +0900 (JST) Received: from beryllium.ruby-lang.org (beryllium.ruby-lang.org [127.0.0.1]) by carbon.ruby-lang.org (Postfix) with ESMTP id B5E9C3C21E2E9; Mon, 24 Dec 2012 11:10:26 +0900 (JST) Received: from fluorine.ruby-lang.org (www.rubyist.net [210.251.121.216]) by carbon.ruby-lang.org (Postfix) with ESMTP id B0C6E3C21EBA8 for ; Mon, 24 Dec 2012 11:10:24 +0900 (JST) Received: from ruby-lang.org (localhost [127.0.0.1]) by fluorine.ruby-lang.org (Postfix) with ESMTP id 7F11E3E003 for ; Mon, 24 Dec 2012 11:10:24 +0900 (JST) Delivered-To: ruby-core@ruby-lang.org Date: Mon, 24 Dec 2012 11:10:25 +0900 Posted: Mon, 24 Dec 2012 11:10:24 +0900 From: "trans (Thomas Sawyer)" Reply-To: ruby-core@ruby-lang.org Subject: [ruby-core:51108] [ruby-trunk - Feature #5781] Query attributes (attribute methods ending in `?` mark) To: ruby-core@ruby-lang.org Message-Id: References: X-ML-Name: ruby-core X-Mail-Count: 51108 X-MLServer: fml [fml 4.0.3 release (20011202/4.0.3)]; post only (only members can post) X-ML-Info: If you have a question, send e-mail with the body "help" (without quotes) to the address ruby-core-ctl@ruby-lang.org; help= X-Mailer: Redmine X-Redmine-Issue-Author: trans X-Redmine-Issue-Assignee: matz X-Auto-Response-Suppress: OOF X-Redmine-Issue-Id: 5781 X-Redmine-Mailinglistintegration-Message-Ids: 23957 X-Redmine-Project: ruby-trunk Auto-Submitted: auto-generated X-Redmine-Site: Ruby Issue Tracking System X-Redmine-Host: bugs.ruby-lang.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Precedence: bulk List-Id: ruby-core.ruby-lang.org List-Software: fml [fml 4.0.3 release (20011202/4.0.3)] List-Post: List-Owner: List-Help: List-Unsubscribe: Issue #5781 has been updated by trans (Thomas Sawyer). =begin FYI, file, line = *caller[0].split(':')[0..1] module_eval %{...}, file, line.to_i Actually this does work. My problem with #source_location stemmed from getting it from the (({attr_writer})) defined method. What I had to do was: def attr_switch(name) file, line = *caller[0].split(':')[0..1] module_eval %{ def #{name}=(x) @#{name}=x end def #{name}? @#{name} end }, file, line.to_i end In any case, still would be better to have `attr_accessor :x?` work. =end ---------------------------------------- Feature #5781: Query attributes (attribute methods ending in `?` mark) https://bugs.ruby-lang.org/issues/5781#change-35042 Author: trans (Thomas Sawyer) Status: Assigned Priority: Normal Assignee: matz (Yukihiro Matsumoto) Category: Target version: next minor Pretty sure this has come up before, but I'd like to revisit b/c I don't understand why it isn't allowed. Sometimes I define "query" attributes, and in those cases I'd like the reader method to end in a `?` mark. Currently I have to do: # @attribute def foo? @foo end or, if I don't mind a shadowing bare method, attr :foo alias_method :foo?, :foo So why not just allow: attr :foo? Currently this causes an error. But why? It just seems like a waste of potentially cleaner code. -- http://bugs.ruby-lang.org/