220 33435 article Path: news.gmane.org!.POSTED!not-for-mail From: Howard Hinnant Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: [idea for proposal] Adding std::shift to Date: Fri, 28 Jul 2017 17:15:58 -0400 Lines: 99 Approved: news@gmane.org Message-ID: References: <3e77c029-bc79-424c-bdad-eba28ec10cdb@isocpp.org> <94CDFCD7-3F9D-4D7E-BDD7-58D27561C291@gmail.com> <96DEA673-B79C-4D08-AE8E-EFFCA3C5A0E8@gmail.com> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\)) Content-Type: multipart/signed; boundary="Apple-Mail=_EF26E42D-57C7-4431-A0D3-E926ED4E8C95"; protocol="application/pgp-signature"; micalg=pgp-sha256 X-Trace: blaine.gmane.org 1501276567 14507 195.159.176.226 (28 Jul 2017 21:16:07 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 28 Jul 2017 21:16:07 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCK2HM4L6YERBEOT53FQKGQEMH5JT4A@isocpp.org Fri Jul 28 23:16:03 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-vk0-f69.google.com ([209.85.213.69]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dbCc0-0003HE-JH for gclcip-std-proposals@m.gmane.org; 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[67.241.68.255]) by smtp.gmail.com with ESMTPSA id w79sm1172025iod.20.2017.07.28.14.15.59 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 28 Jul 2017 14:16:00 -0700 (PDT) In-Reply-To: <96DEA673-B79C-4D08-AE8E-EFFCA3C5A0E8@gmail.com> X-Mailer: Apple Mail (2.3273) X-Original-Sender: howard.hinnant@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=fBO47Pty; spf=pass (google.com: domain of howard.hinnant@gmail.com designates 2607:f8b0:4001:c0b::22b as permitted sender) smtp.mailfrom=howard.hinnant@gmail.com; dmarc=pass (p=NONE sp=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-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:33435 Archived-At: --Apple-Mail=_EF26E42D-57C7-4431-A0D3-E926ED4E8C95 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" From the paper: > move and move_backward are two new algorithms to augment copy and copy_ba= ckward. They require only that the value_type be MoveAssignable (recall tha= t CopyAssignable types are MoveAssignable). Strictly speaking the functiona= lity could be obtained with the combination of copy (or copy_backward) and = move_iterator, however the anticipated frequency of use of these functions = indicates that the syntactic convenience of these functions is warranted. The last sentence applies to both of the new algorithms. Howard On Jul 28, 2017, at 4:51 PM, Dan Raviv wrote: >=20 > It looks like that section mentions the addition of std::move_backward, b= ut not the rationale for adding it in addition to std::move. Or am I missin= g something? >=20 > Thanks, > Dan >=20 >> On 28 Jul 2017, at 22:19, Howard Hinnant wrot= e: >>=20 >>> On Jul 28, 2017, at 2:43 PM, Dan Raviv wrote: >>>=20 >>> Does anyone know if there was a specific motivation for adding std::mov= e_backward() to ? It seems that using std::move() with rbegin(),= rend() iterators (for the basic use case) would have the same effect. >>=20 >> See http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1771.html >>=20 >> Section 25 - Algorithms library >>=20 >> Howard >>=20 >> -- >> You received this message because you are subscribed to the Google Group= s "ISO C++ Standard - Future Proposals" group. >> To unsubscribe from this group and stop receiving emails from it, send a= n 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/iso= cpp.org/d/msgid/std-proposals/94CDFCD7-3F9D-4D7E-BDD7-58D27561C291%40gmail.= com. >=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= 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/isoc= pp.org/d/msgid/std-proposals/96DEA673-B79C-4D08-AE8E-EFFCA3C5A0E8%40gmail.c= om. --=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. 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