220 34915 <20171014160909.GB1546@fukushima.lysator.liu.se> article Path: news.gmane.org!.POSTED!not-for-mail From: Magnus Fromreide Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Thoughts on more methods towards containers in the future Date: Sat, 14 Oct 2017 18:09:09 +0200 Lines: 25 Approved: news@gmane.org Message-ID: <20171014160909.GB1546@fukushima.lysator.liu.se> References: <0cc942cf-a217-4175-98b0-b466ac224dc7@isocpp.org> <7e04a500-ba3a-432a-a844-7d4def1fb739@isocpp.org> <5c1bc3ef-c3a2-4406-8a7a-f82e12155386@isocpp.org> <69a588d5-de2a-4be2-8add-9685d0b9a230@isocpp.org> <405f3ea9-d886-4c3f-9543-a276f8214974@isocpp.org> <02fc9853-e388-4eb3-8db3-de4e0a689056@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" X-Trace: blaine.gmane.org 1507997360 25988 195.159.176.226 (14 Oct 2017 16:09:20 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 14 Oct 2017 16:09:20 +0000 (UTC) User-Agent: Mutt/1.5.23 (2014-03-12) Cc: euloanty@live.com To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBDELLREETMBRBJ7NRDHQKGQEZGH4E3I@isocpp.org Sat Oct 14 18:09:13 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-lf0-f72.google.com ([209.85.215.72]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1e3Ozp-0004xJ-Jf for gclcip-std-proposals@m.gmane.org; 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[2001:6b0:17:f0a0::3]) by mx.google.com with ESMTPS id h28si1078691lfb.350.2017.10.14.09.09.10 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 14 Oct 2017 09:09:10 -0700 (PDT) Received-SPF: pass (google.com: domain of magfr@lysator.liu.se designates 2001:6b0:17:f0a0::3 as permitted sender) client-ip=2001:6b0:17:f0a0::3; Original-Received: from mail.lysator.liu.se (localhost [127.0.0.1]) by mail.lysator.liu.se (Postfix) with ESMTP id 56AF04001F; Sat, 14 Oct 2017 18:09:10 +0200 (CEST) Original-Received: from fukushima.lysator.liu.se (fukushima.lysator.liu.se [IPv6:2001:6b0:17:f0a0::5d]) by mail.lysator.liu.se (Postfix) with SMTP id 2D28340014; Sat, 14 Oct 2017 18:09:09 +0200 (CEST) Original-Received: by fukushima.lysator.liu.se (sSMTP sendmail emulation); Sat, 14 Oct 2017 18:09:09 +0200 Mail-Followup-To: std-proposals@isocpp.org, euloanty@live.com Content-Disposition: inline In-Reply-To: <02fc9853-e388-4eb3-8db3-de4e0a689056@isocpp.org> X-Virus-Scanned: ClamAV using ClamSMTP X-Original-Sender: magfr@lysator.liu.se X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of magfr@lysator.liu.se designates 2001:6b0:17:f0a0::3 as permitted sender) smtp.mailfrom=magfr@lysator.liu.se 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:34915 Archived-At: On Sat, Oct 14, 2017 at 08:44:42AM -0700, euloanty@live.com wrote: > For example. I want to test whether I reserve the exactly correct capacity > for vector. > > > vector v; > v.reserve(100000); > //emplace_back for 100001 times. I cant find mistakes. > > > vector v; > v.reserve(100000); > //non check emplace_back for 100001 times > This program will collapse. And I can know I've made mistake here. No, that program have undefined behaviour so you do not know what will happen. /MF -- 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. To view this discussion on the web visit https://groups.google.com/a/isocpp.org/d/msgid/std-proposals/20171014160909.GB1546%40fukushima.lysator.liu.se. .