220 34928 <62cd9e1e-03b8-4125-a032-72624a9f5254@isocpp.org> article Path: news.gmane.org!.POSTED!not-for-mail From: "T. C." Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Idea about "std::pmr::memory_resource" Date: Sat, 14 Oct 2017 12:54:40 -0700 (PDT) Lines: 50 Approved: news@gmane.org Message-ID: <62cd9e1e-03b8-4125-a032-72624a9f5254@isocpp.org> References: <0a8293b4-3246-47a5-9881-bc1ca4b91772@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_14740_1364155092.1508010880894" X-Trace: blaine.gmane.org 1508010893 31648 195.159.176.226 (14 Oct 2017 19:54:53 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 14 Oct 2017 19:54:53 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBCQ43G7NQIIRBAOXRHHQKGQENUJKYCQ@isocpp.org Sat Oct 14 21:54:48 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-vk0-f71.google.com ([209.85.213.71]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1e3SW3-0005zd-Hr for gclcip-std-proposals@m.gmane.org; Sat, 14 Oct 2017 21:54:35 +0200 Original-Received: by mail-vk0-f71.google.com with SMTP id n70sf4561671vkf.8 for ; Sat, 14 Oct 2017 12:54:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:message-id:in-reply-to:references:subject:mime-version :x-original-sender:reply-to:precedence:mailing-list:list-id :list-post:list-help:list-archive:list-subscribe:list-unsubscribe; bh=e+OIEzjb/lgLd0MikMa6azz++WRr2GTLy015B9fjOZw=; b=V+ZwBtgcg4QwByM6yQBTc3epRVA5dRY9GhFDv+R75QjXCzU0UXodtj8Fiufznb+qQl M5hM3gklAiypv36DZWg8QWEQC46TwT/Sz9GoVIKLjpSXQNz5qGxjIuQtiUEg/vaNWRXJ p3kDcE8TV+n9anHOPyQFdDo2osec4Vc80bLdgOdZZu1rYSrkiK1BV+5jbYBzAoQzoOsD AgebsxOTkNAA7Vt2lfdfxv5eAqp0R0SUnJ76NdxflHFpqpuprBSyBZm5ktSSiXEjz307 GSTkY7BbySBOMO11M1WyH86a+z7k8JSdmgxPvP1TBmy8jcg/M/M7Hb3hFRwOWvTkpZaD xoyQ== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:message-id:in-reply-to:references:subject:mime-version :x-original-sender:reply-to:precedence:mailing-list:list-id :list-post:list-help:list-archive:list-subscribe:list-unsubscribe; bh=e+OIEzjb/lgLd0MikMa6azz++WRr2GTLy015B9fjOZw=; b=P4TM7+zgsRuIMQzDpxjIQn9mJIDI6ZFvhIDF55AzK4z6skppgq9yQrFFC/qM8Jk2Ig 6d/OEqpDp/jtxojL8+CAPHfrGBF1HUEbCVdbvbAGvx2Xwy+/Gtm7QefX4GSqaPiQNlTX vkgmvVcFqk0RZLBVmaNjVvZ7c551pSlGYNsj4dwLaO4jx98EoXHGNh8k6m/RFN65nSPG fxzB8RjXp7QI2PXBPDRe5nv6ezJwJV9EjW3LnZZV++J1I8CnAE3W7PPOdf7+iKPQdhmy 65643pl6/zShKQnNTNaQYRkwJprwpUIH9WnHgcb3ke5cQ7h3I+yhWai4jhpIMvBg9jAM gnDw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:message-id:in-reply-to:references :subject:mime-version:x-original-sender:reply-to:precedence :mailing-list:list-id:x-spam-checked-in-group:list-post:list-help :list-archive:list-subscribe:list-unsubscribe; bh=e+OIEzjb/lgLd0MikMa6azz++WRr2GTLy015B9fjOZw=; b=k6+Zu1fmhbBRz0+EaKYVp0lKE9soEnxWP9HBJPwkPQza5uuQc6PehJW0S1Lsyt1hOw VG6wCTXw9VUFD28K5nCLfhpDQxe8ZwM6+9MgKLI1GNtoTaypYLmi3mXf83v0zx6icM9N A5BoISiu5Bb3RZya8hil2Sr56TOS0Kw44fhnoxshqCtoEDs74M0H0S1wk8SckdluRY7a anwWymF8SBPAnUXNeC67JlqlepRWzv/IGuXNoxmZKQdtyjZqNRmEy3AzkD6okoMGwR5K tlS2hhc0OhmGEMHTJiqL+vo0fzSKU8ckb0QXmawktnpP+5XeZNmci0+uMY+cyAC3txLh OZqQ== X-Gm-Message-State: AMCzsaUNzKLlInucu9STJEf4E7xTSLrrWQM7R5wDFpcKAFD/04jwXvpb D9SjYvpZ6KpjIbu4HLdAb04vbQ== X-Google-Smtp-Source: AOwi7QAO1afhHmmbZqqqX0ljnERwBVRhXqbWxzg+2bljWxWuML9mKZQTBPnL1/gC+3Qcw6KogE3UMQ== X-Received: by 10.31.133.83 with SMTP id h80mr2704068vkd.77.1508010882741; Sat, 14 Oct 2017 12:54:42 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.31.95.212 with SMTP id t203ls2465746vkb.0.gmail; Sat, 14 Oct 2017 12:54:41 -0700 (PDT) X-Received: by 10.31.7.137 with SMTP id 131mr338932vkh.5.1508010881364; Sat, 14 Oct 2017 12:54:41 -0700 (PDT) In-Reply-To: <0a8293b4-3246-47a5-9881-bc1ca4b91772@isocpp.org> X-Original-Sender: rs2740@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:34928 Archived-At: ------=_Part_14740_1364155092.1508010880894 Content-Type: multipart/alternative; boundary="----=_Part_14741_641217396.1508010880894" ------=_Part_14741_641217396.1508010880894 Content-Type: text/plain; charset="UTF-8" For simple memory resources, including the three in the standard, is_equal implementations can simply do an address comparison. There's no need for dynamic_cast or RTTI. That the standard currently depicts dynamic_casts for them is a defect. See https://cplusplus.github.io/LWG/issue3000 -- 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/62cd9e1e-03b8-4125-a032-72624a9f5254%40isocpp.org. ------=_Part_14741_641217396.1508010880894 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
For simple memory resources, including the three in the st= andard, is_equal implementations can simply do an address comparison. There= 's no need for dynamic_cast or RTTI.

That the standa= rd currently depicts dynamic_casts for them is a defect. See=C2=A0https://c= plusplus.github.io/LWG/issue3000

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