220 24864 article Path: news.gmane.org!not-for-mail From: daniele.bordes@gmail.com Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Partial class: a separation of a class interface from its implementation with no memory costs Date: Tue, 1 Mar 2016 02:18:51 -0800 (PST) Lines: 121 Approved: news@gmane.org Message-ID: References: <374600f5-0397-4243-91bc-d01afd145e6c@isocpp.org> <59566830-e0fd-4730-9416-bc427c249c48@isocpp.org> <71766f85-7330-4387-8485-642e3f3ad003@isocpp.org> <7b8d4b4b-2d2f-4dcf-87a6-daac5b94499d@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_4256_1558937357.1456827531643" X-Trace: ger.gmane.org 1456827535 14669 80.91.229.3 (1 Mar 2016 10:18:55 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 1 Mar 2016 10:18:55 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBDEOD2UIVYHBBDGZ2W3AKGQEO2UN5FI@isocpp.org Tue Mar 01 11:18:55 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-io0-f200.google.com ([209.85.223.200]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1aahOI-00070O-LC for gclcip-std-proposals@m.gmane.org; Tue, 01 Mar 2016 11:18:54 +0100 Original-Received: by mail-io0-f200.google.com with SMTP id 70sf315600812iok.1 for ; Tue, 01 Mar 2016 02:18:54 -0800 (PST) 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 :x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=x/rC/POzMt1tMXkC/JV0G0v5Q4UpCNp9/v428migxaM=; b=0En0TWqtvhO1r2om8ul7djfsbX64jAqSPROikKZXg4a37rV6UPrd4dAj7Zhchsz9DH 9DKhTFSJhY6dMmX7UKtNX1vrtZqNCFuLYxfye33zzJ1nUrl5Z24VRu6JPkxnCqkXOEiP P+BPvigaB+fkt50N0ZhIjlgRXzU06zgj3AyBo5vlwjBiMA2oPhzLbAYFs1SNhso9qLNa IM0JvjptGdmTRYBfleRyskP0vYkMamWHfr/DRQZt/Nid4BZVt1WeSaQBzpslVQJKqUKp TQ7ZsmNzuimY8StmZBuA0ETFyA0x8qDBtHIcvZmOZ9DxRwRrKrGPIgTrEsqMliaC7rcm tuzQ== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=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=x/rC/POzMt1tMXkC/JV0G0v5Q4UpCNp9/v428migxaM=; b=KvO0mvH3hvJxMf+LNCJYtCUX1W7ojy7CgBeA9st5IxHc3OwnRDxEAPh27YODTksxuy Dcj94CZIpF6k08HhJcK+IIUxJ47AZh4huXfRuFFbZhlmM8yY4oN4/8HsMAO1OQw06il1 dXxWAi5Ezj3YCSel533sFquQI8FFHMqYn70J4S9hVHNZk5eg4JD276RN/9zJ8UamHBre hyOCzSsP8YSwLa9s61y/VSHtDQOKTBBDrJMsQxE/7asqtAB4Hf++A0k1AzsFB5J6dFwP WgE4L9HELh3dMkDyvdi6lfdX2gI4RA32Xn52vG11r4qXDJ8GHXiPfKe30afeHeJUFo2H GwpQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; 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=x/rC/POzMt1tMXkC/JV0G0v5Q4UpCNp9/v428migxaM=; b=ifURjk0Av1yqPYEPDxqsaljowF1bTnNXc06xAcOeXRiL4lQC9Y6Soh/6m76ObtZUw/ LvOVMaJl6kCVJu41lekkRmB2S86Tl1Z9RA9hcLOJOfvMKuWY95UzteRAnPmao7Tkbo+s +HUVrDXjI0/RDDUxSK9GzlXg9v1cd9FnPMX7ur2BRi/d0A2xSlmcRBGNkk/QP3qZGitQ Dv+9JHYJLOj2LcTsF+a+Iug2ko9zgHT5kUo3kuwf42wTfQs1xGSnALcYmMK9jqB9Rowu vLQDZ+lJgTdtD459BhKzDB/JCAnoO7i5v7MgtC0rrhCCy6Eavr03hwpRcVyNuiKHozOc mxnA== X-Gm-Message-State: AG10YOQD9ZXaxuhy9RWwwy3JEKrurtZD9mqmkrnj5iT3E7+jnMgAwQ7XZR4RXhpDg0ihfQ== X-Received: by 10.107.138.211 with SMTP id c80mr21793338ioj.20.1456827533705; Tue, 01 Mar 2016 02:18:53 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.107.26.196 with SMTP id a187ls1904277ioa.79.gmail; Tue, 01 Mar 2016 02:18:52 -0800 (PST) X-Received: by 10.50.66.236 with SMTP id i12mr43807igt.7.1456827532789; Tue, 01 Mar 2016 02:18:52 -0800 (PST) In-Reply-To: X-Original-Sender: Daniele.Bordes@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:24864 Archived-At: ------=_Part_4256_1558937357.1456827531643 Content-Type: multipart/alternative; boundary="----=_Part_4257_1472370525.1456827531643" ------=_Part_4257_1472370525.1456827531643 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Please do not comment here anymore. The proposal has been refined at this link: https://groups.google.com/a/isocpp.org/forum/#!topic/std-proposals/VThp-UMc= k7k Il giorno marted=C3=AC 1 marzo 2016 10:34:08 UTC+1, Viacheslav Usov ha scri= tto: > > On Mon, Feb 29, 2016 at 8:30 PM, >=20 > wrote: > >> "The only thing not achieved by the above is the method call syntax." >> >> No. In the above C-like method all data members of the struct (declared= =20 >> somewhere alse) are public. >> > > "Declared somewhere else" means "not declared for interface users", which= =20 > makes its entire content private. A forward-only plain C structure=20 > declaration has a lot more privacy than a C++ class with private parts; y= ou=20 > know this, because this is what you want to achieve with your proposal. > > > Every other methods have access to the data members of the struct. My= =20 > proposal keeps encapsulation, not only the call syntax. > > As stated above, a forward-only structure declaration is a lot more=20 > encapsulation than a full C++ class definition with private parts. It is= =20 > still more encapsulation than your proposal. You were given a link to a= =20 > document by Stroustrup, whose opinion seems so important for you, which= =20 > stated quite plainly that *not placing* functions in a class achieves *be= tter=20 > encapsulation*. > > Cheers, > V. > --=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. To view this discussion on the web visit https://groups.google.com/a/isocpp= ..org/d/msgid/std-proposals/f3cf4449-075f-48b0-a4b9-f89519765374%40isocpp.or= g. ------=_Part_4257_1472370525.1456827531643 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Please do not comment here anymore.
The pro= posal has been refined at this link:



Il g= iorno marted=C3=AC 1 marzo 2016 10:34:08 UTC+1, Viacheslav Usov ha scritto:=
On Mon, Feb 29, 2016 at 8:30 PM, <= danie= le...@gmail.com> wrote:
= "The only thing not achieved by the above is the method call syntax.&q= uot;

No. In the above C-like method all data members of = the struct (declared somewhere alse) are public.

"Declared somewhere else" means "not decla= red for interface users", which makes its entire content private. A fo= rward-only=C2=A0plain C structure declaration has a lot more privacy than a= C++ class with private parts; you know this, because this is what you want= to achieve with your proposal.

> Every other m= ethods have access to the data members of the struct. My proposal keeps enc= apsulation, not only the call syntax.

As stated ab= ove, a forward-only structure declaration is a lot more encapsulation than = a full C++ class definition with private parts. It is still more encapsulat= ion than your proposal. You were given a link to a document by Stroustrup, = whose opinion seems so important for you, which stated quite plainly that <= i>not placing=C2=A0functions in a class achieves better encapsulatio= n.

Cheers,
V.
<= /div>

--
You received this message because you are subscribed to the Google Groups &= quot;ISO C++ Standard - Future Proposals" group.
To unsubscribe from this group and stop receiving emails from it, send an e= mail to std-proposa= ls+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/f3cf4449-075f-48b0-a4b9-f89519765374= %40isocpp.org.
------=_Part_4257_1472370525.1456827531643-- ------=_Part_4256_1558937357.1456827531643-- .