220 11493 article Path: news.gmane.org!not-for-mail From: Nevin Liber Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Controversy and debate: Uninitialized variables by default is a bug Date: Tue, 17 Jun 2014 18:29:22 +0200 Lines: 64 Approved: news@gmane.org Message-ID: References: <60caa4ef-b32d-40fe-97b6-8918fbb2bd51@isocpp.org> <0c70b26d-9af9-498d-b27f-37cf7afe9655@isocpp.org> <5c9d83ad-b2ba-4b4f-8344-f2a1755ef98d@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=047d7b3a8176d60ea304fc0aa7cb X-Trace: ger.gmane.org 1403022612 32074 80.91.229.3 (17 Jun 2014 16:30:12 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 17 Jun 2014 16:30:12 +0000 (UTC) To: "std-proposals@isocpp.org" Original-X-From: std-proposals+bncBCE35H5S6IDBBC62QGOQKGQEV3ANNQA@isocpp.org Tue Jun 17 18:30:05 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-lb0-f199.google.com ([209.85.217.199]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WwwGq-0005yp-Hn for gclcip-std-proposals@m.gmane.org; Tue, 17 Jun 2014 18:30:04 +0200 Original-Received: by mail-lb0-f199.google.com with SMTP id l4sf4644818lbv.6 for ; Tue, 17 Jun 2014 09:30:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:sender:in-reply-to:references:from :date:message-id:subject:to:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:list-post:list-help:list-archive:list-subscribe :list-unsubscribe:content-type; bh=ETwt7DNNhARV6kIMhXzDQHUqUoOvU/+y6VCgBy0CADM=; b=YDqL+1QITZJZvGENH4OgRdtYJ55jdF6sLP6HXvEe3k2FqUHCOGedbzZSrdKsN2biQS RC2v35G8uTKz+yi4j5vUhIEOXn8m81Mrs9GC8L03PXSmCeKr9EyhXQX8FdYHkKlLOicq ROCHdcuzKJf6LrYztfHJYxDj4IqKgaBOa2AcpdwIoT9RS6G5e6VO6z8JnRuCjkMALQ13 hjnY1SCtPJJRdt4evZrFehXSPRP6oRRuZneWkHqpwVTML8MRQjYrLfF8BPF5s/r9OguF Plm7nJ+Bqs8KhiCNtMcOtS6inFZh4S/3RvgV+S4RsEwtcv3uh32vQW4JRF2dggzv9vaD tJvA== X-Gm-Message-State: ALoCoQmzlGBGw/PI2EdJUjtjIX1NNpUFcuTTq1vS575hKl8fSEDo5Ti0OAU1v86Fy9vqxT+G9wrx X-Received: by 10.180.14.129 with SMTP id p1mr2945816wic.0.1403022604294; Tue, 17 Jun 2014 09:30:04 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.180.5.131 with SMTP id s3ls485921wis.11.canary; Tue, 17 Jun 2014 09:30:02 -0700 (PDT) X-Received: by 10.195.13.79 with SMTP id ew15mr39262430wjd.19.1403022602968; Tue, 17 Jun 2014 09:30:02 -0700 (PDT) Original-Received: from mail-wg0-x233.google.com (mail-wg0-x233.google.com [2a00:1450:400c:c00::233]) by mx.google.com with ESMTPS id jk20si13300257wic.0.2014.06.17.09.30.02 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 17 Jun 2014 09:30:02 -0700 (PDT) Received-SPF: pass (google.com: domain of nliber@gmail.com designates 2a00:1450:400c:c00::233 as permitted sender) client-ip=2a00:1450:400c:c00::233; Original-Received: by mail-wg0-f51.google.com with SMTP id x12so7172697wgg.34 for ; Tue, 17 Jun 2014 09:30:02 -0700 (PDT) X-Received: by 10.194.1.164 with SMTP id 4mr38930938wjn.17.1403022602535; Tue, 17 Jun 2014 09:30:02 -0700 (PDT) Original-Sender: nliber@gmail.com Original-Received: by 10.194.122.71 with HTTP; Tue, 17 Jun 2014 09:29:22 -0700 (PDT) In-Reply-To: <5c9d83ad-b2ba-4b4f-8344-f2a1755ef98d@isocpp.org> X-Original-Sender: nevin@eviloverlord.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of nliber@gmail.com designates 2a00:1450:400c:c00::233 as permitted sender) smtp.mail=nliber@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:11493 Archived-At: --047d7b3a8176d60ea304fc0aa7cb Content-Type: text/plain; charset=UTF-8 On 17 June 2014 18:24, Matthew Fioravante wrote: > > Standard library containers do not behave any differently, they always > initialize their contents by default as they were designed to do in the > beginning. > No, they don't. They use the construct function in the allocator. One use of allocators is to eliminate the cost of zero initializing large vectors. -- Nevin ":-)" Liber (847) 691-1404 -- --- 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 email 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-proposals/. --047d7b3a8176d60ea304fc0aa7cb Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On 17 June 2014 18:24, Matthew Fioravante <fmatthew5= 876@gmail.com> wrote:

Standard library contai= ners do not behave any differently, they always initialize their contents b= y default as they were designed to do in the beginning.

No, they don't. =C2=A0They use t= he construct function in the allocator. =C2=A0One use of allocators is to e= liminate the cost of zero initializing large vectors.
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=C2= =A0Nevin ":-)" Liber=C2=A0 <mailto:nevin@eviloverlord.com>=C2=A0 (847)= 691-1404

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