220 3618 <5161BC42.3040006@gmail.com> article Path: news.gmane.org!not-for-mail From: Martinho Fernandes Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: "break break ;" etc. to break out of nested loops Date: Sun, 07 Apr 2013 20:34:42 +0200 Lines: 38 Approved: news@gmane.org Message-ID: <5161BC42.3040006@gmail.com> References: <1f964e4b-2762-43b8-85e5-41392926b07a@isocpp.org> <51614514.2060103@bubblescope.net> <1365335337.7051.10.camel@patrick-laptop-debian.home> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1365359686 30386 80.91.229.3 (7 Apr 2013 18:34:46 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 7 Apr 2013 18:34:46 +0000 (UTC) Cc: Patrick Michael Niedzielski To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBDXL3FEUYQARBRXYQ2FQKGQEHVO3SJY@isocpp.org Sun Apr 07 20:34:49 2013 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-we0-f197.google.com ([74.125.82.197]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1UOuQR-00014a-1u for gclcip-std-proposals@m.gmane.org; Sun, 07 Apr 2013 20:34:47 +0200 Original-Received: by mail-we0-f197.google.com with SMTP id p43sf6795467wea.4 for ; Sun, 07 Apr 2013 11:34:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=x-received:x-beenthere:x-received:received-spf:x-received :message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:x-google-group-id:list-post:list-help:list-archive :list-subscribe:list-unsubscribe:content-type :content-transfer-encoding; bh=A6+w2LpAYJo2wQ8QEn5SywZ5YqJDSHBEKJZ3HnqneEQ=; b=PRT2i6xSEhL3wTf3gcHMEZS99E1T7HfgsZW5OiqClT+MafVHhNK+7cCaD8BUP0/VAL fSW2jkTnrs0GNAjtmU0ISaQfHJQOW7mjpoJtjoRgGS1NgV2sQBNDmgBDQzpeDAAKneoq LUcN7IOKRygxIEMMZEOmYQwVHCySsh+G7CJwX6V9Xe+jzFoOeG674cV/tN0oxbMeRRD3 ZT0Hku7ENdcETqjPzAlRNQYC6mYKUhRbWJFbayTWQfqX+48qcN/oq3Cez4ThC4ZtrEEe iQSLSESJob X-Received: by 10.180.92.202 with SMTP id co10mr2491170wib.1.1365359686759; Sun, 07 Apr 2013 11:34:46 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.180.24.201 with SMTP id w9ls669682wif.23.gmail; Sun, 07 Apr 2013 11:34:45 -0700 (PDT) X-Received: by 10.14.210.132 with SMTP id u4mr30424134eeo.19.1365359685805; Sun, 07 Apr 2013 11:34:45 -0700 (PDT) Original-Received: from mail-ea0-x234.google.com (mail-ea0-x234.google.com [2a00:1450:4013:c01::234]) by mx.google.com with ESMTPS id z49si26870917eep.192.2013.04.07.11.34.45 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sun, 07 Apr 2013 11:34:45 -0700 (PDT) Received-SPF: pass (google.com: domain of martinho.fernandes@gmail.com designates 2a00:1450:4013:c01::234 as permitted sender) client-ip=2a00:1450:4013:c01::234; Original-Received: by mail-ea0-f180.google.com with SMTP id d10so1941679eaj.39 for ; Sun, 07 Apr 2013 11:34:45 -0700 (PDT) X-Received: by 10.15.32.67 with SMTP id z43mr31773520eeu.24.1365359685622; Sun, 07 Apr 2013 11:34:45 -0700 (PDT) Original-Received: from [192.168.179.164] (p5B3D5658.dip.t-dialin.net. [91.61.86.88]) by mx.google.com with ESMTPS id d47sm27685434eem.9.2013.04.07.11.34.43 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sun, 07 Apr 2013 11:34:44 -0700 (PDT) User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130307 Thunderbird/17.0.4 In-Reply-To: <1365335337.7051.10.camel@patrick-laptop-debian.home> X-Original-Sender: martinho.fernandes@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of martinho.fernandes@gmail.com designates 2a00:1450:4013:c01::234 as permitted sender) smtp.mail=martinho.fernandes@gmail.com; dkim=pass header.i=@gmail.com Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:3618 Archived-At: On 07.04.2013 13:48, Patrick Michael Niedzielski wrote: > The difference between `break break ...' and the other examples is=20 > that they are *extremely* common code patterns. While all of them=20 > encode some sort of semantic information that the equivalent jump or=20 > goto would lack, a `break break ...' statement would be used much,=20 > *much* less frequently. I personally think this has diminishing=20 > returns. You want a `goto' that only works in one place (which in and=20 > of itself is an okay or good thing, like `break', `return', and=20 > `continue'), but that one place is somewhere that won't be commonly=20 > encountered. While it would be useful when it is encountered, it's not=20 > exactly a corner case, it doesn't really provide much benefit. Best,=20 > Patrick Niedzielski=20 And more often than not, this "break break" thing only feels necessary=20 when you eschew using algorithms, or when you are lacking the proper=20 iterators. IMO if there is a looping pattern you are repeating over and=20 over, you should put it in an algorithm and call it a day. That is more=20 flexible than new syntax, less verbose, and clearer (because you named=20 your algorithm well, right?). --=20 Mit freundlichen Gr=FC=DFen, Martinho Fernandes --=20 ---=20 You received this message because you are subscribed to the Google Groups "= ISO C++ Standard - Future Proposals" group. To unsubscribe from this group and stop receiving emails from it, send an e= mail to std-proposals+unsubscribe@isocpp.org. To post to this group, send email to std-proposals@isocpp.org. Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposa= ls/?hl=3Den. .