From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Thread: 103376,4cb1f8d1c17d39a8
X-Google-NewGroupId: yes
X-Google-Attributes: gida07f3367d7,domainid0,public,usenet
X-Google-Language: ENGLISH,ASCII-7-bit
Received: by 10.68.27.132 with SMTP id t4mr4220200pbg.3.1320249588379;
        Wed, 02 Nov 2011 08:59:48 -0700 (PDT)
Path: 
 p6ni63134pbn.0!nntp.google.com!news1.google.com!npeer02.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!post02.iad.highwinds-media.com!news.flashnewsgroups.com-b7.4zTQh5tI3A!not-for-mail
From: Stephen Leake <stephen_leake@stephe-leake.org>
Newsgroups: comp.lang.ada
Subject: Re: Ada 'hello world' for Android; success!
References: <8239efcjuw.fsf@stephe-leake.org>
 	<98ca5430-aa52-4e39-b789-70d0dd6adb46@d33g2000prb.googlegroups.com>
 	<824nyrq5p6.fsf@stephe-leake.org>
 	<4eac1ca1$0$7625$9b4e6d93@newsspool1.arcor-online.net>
 	<82mxciogt0.fsf@stephe-leake.org>
 	<4s9hvvnvd44l$.pzu8zi1ndkkp.dlg@40tude.net>
Date: Wed, 02 Nov 2011 11:59:46 -0400
Message-ID: <82ipn2ms5p.fsf@stephe-leake.org>
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (windows-nt)
Cancel-Lock: sha1:PzoKpVGZ48fHKr/Sdf/ayzJHCJI=
MIME-Version: 1.0
X-Complaints-To: abuse@flashnewsgroups.com
Organization: FlashNewsgroups.com
X-Trace: 29f4d4eb168f4e26b0fa622226
Xref: news1.google.com comp.lang.ada:18790
Content-Type: text/plain; charset=us-ascii
Date: 2011-11-02T11:59:46-04:00
List-Id: <comp.lang.ada>

"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:

> On Sun, 30 Oct 2011 07:32:59 -0400, Stephen Leake wrote:
>
>> In brief, _any_ framework that uses dispatching on class-wide
>> objects needs reference semantics.
>
> Wrong. Reference semantics is required to maintain object's identity.

Well, yes. What good is a system that does not maintain object identity?

Please rewrite my access_vs_object example, without using reference
semantics. Note that I am explicitly including container cursors as a
"reference type".

Or show me another real system that has dispatching on collections of
heterogeneous objects without reference semantics.

The proof is in the details.

-- 
-- Stephe