220 22167 <6B6E94B4-F839-4D94-96B1-24F289CFDFE3@gmail.com> article Path: news.gmane.org!not-for-mail From: Howard Hinnant Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: basic_string, vector, and array iterators: required to be pointers? Date: Fri, 30 Oct 2015 18:47:23 -0400 Lines: 32 Approved: news@gmane.org Message-ID: <6B6E94B4-F839-4D94-96B1-24F289CFDFE3@gmail.com> References: <56325CA3.7040507@gmail.com> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 (Mac OS X Mail 9.1 \(3096.5\)) Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1446245255 10715 80.91.229.3 (30 Oct 2015 22:47:35 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 30 Oct 2015 22:47:35 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCK2HM4L6YERB7HGZ6YQKGQE4IJ75OI@isocpp.org Fri Oct 30 23:47:30 2015 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-pa0-f69.google.com ([209.85.220.69]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1ZsISF-0006Ar-3v for gclcip-std-proposals@m.gmane.org; Fri, 30 Oct 2015 23:47:27 +0100 Original-Received: by pabws5 with SMTP id ws5sf11465601pab.0 for ; Fri, 30 Oct 2015 15:47:25 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:content-type:mime-version:subject:from :in-reply-to:date:content-transfer-encoding:message-id:references:to :x-original-sender:x-original-authentication-results:reply-to :precedence:mailing-list:list-id:x-spam-checked-in-group:list-post :list-help:list-archive:list-subscribe:list-unsubscribe; bh=4tuajQO6FZICJBbun+vhxO21I6v3FoMivafQCeR3xyg=; b=C6SiED07+HJ4JAEBjZLjYRQRJSNizirTBvjf9AnEBSZhIPIGIcwYNKJJO0HLbkNFuQ qOKUgvPDkh0Il9ZytSdUGwZyNDIqS2qj7tnNraW43zTqsmYWWvV9gKlkPiZNKKnD9W0Q 0M6V/3jUWy1183Vd4EhFXtGr7EogjTUA9+0/akEHrYpR+Dqv+FDIv46KuvmXOkxbupSv DFe64ibIRC5iqgolCRqXHNa+04jlqQ+zER+9hnphKsm5CZLOHEbpNM4oknwYjCOWVvh9 gpcYu+YktxNqkJfqC9nslqRxrbNAG2FxPfYR2uuFpyLMDXCkG9/0DGDgXhhU5AJIwC54 X-Gm-Message-State: ALoCoQk0R7D4WCGvz8EWnUS6ROUzopPAhIe8QKgNz4XxmVsEfT9XWTvSsYQhLrFicv36Vtxc+p7R X-Received: by 10.66.182.135 with SMTP id ee7mr8588913pac.32.1446245245711; Fri, 30 Oct 2015 15:47:25 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.140.102.165 with SMTP id w34ls1604465qge.68.gmail; Fri, 30 Oct 2015 15:47:24 -0700 (PDT) X-Received: by 10.55.21.65 with SMTP id f62mr13584324qkh.46.1446245244342; Fri, 30 Oct 2015 15:47:24 -0700 (PDT) Original-Received: from mail-qg0-x230.google.com (mail-qg0-x230.google.com. [2607:f8b0:400d:c04::230]) by mx.google.com with ESMTPS id n16si7956017qkh.72.2015.10.30.15.47.24 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 30 Oct 2015 15:47:24 -0700 (PDT) Received-SPF: pass (google.com: domain of howard.hinnant@gmail.com designates 2607:f8b0:400d:c04::230 as permitted sender) client-ip=2607:f8b0:400d:c04::230; Original-Received: by qgem9 with SMTP id m9so73731588qge.1 for ; Fri, 30 Oct 2015 15:47:24 -0700 (PDT) X-Received: by 10.140.238.204 with SMTP id j195mr14161047qhc.53.1446245244054; Fri, 30 Oct 2015 15:47:24 -0700 (PDT) Original-Received: from [10.0.1.25] (cpe-104-229-168-124.twcny.res.rr.com. [104.229.168.124]) by smtp.gmail.com with ESMTPSA id u200sm46518qka.14.2015.10.30.15.47.23 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 30 Oct 2015 15:47:23 -0700 (PDT) In-Reply-To: X-Mailer: Apple Mail (2.3096.5) X-Original-Sender: howard.hinnant@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of howard.hinnant@gmail.com designates 2607:f8b0:400d:c04::230 as permitted sender) smtp.mailfrom=howard.hinnant@gmail.com; dkim=pass header.i=@gmail.com; dmarc=pass (p=NONE dis=NONE) header.from=gmail.com Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Spam-Checked-In-Group: std-proposals@isocpp.org 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:22167 Archived-At: On Oct 30, 2015, at 6:27 PM, Sean Middleditch wrote: >=20 > 2) Why would anyone want to build up that much scaffolding (custom > iterator types, special compiler optimization control, manual tweaking > and optimization, etc.) just to get a slightly-slower-to-compile and > much-harder-to-maintain version of a raw pointer? Just use a pointer. So that you get consistent ADL behavior when you switch containers: template void test(C& c) { sort(c.begin(), c.end()); // works the same whether c is a std::vector= or std::deque } But that=E2=80=99s just another QoI issue std::lib vendors deal with. Howard --=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/. .