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=-2.9 required=5.0 tests=BAYES_00,MAILING_LIST_MULTI
	autolearn=unavailable autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,a00006d3c4735d70
X-Google-Attributes: gid103376,public
X-Google-ArrivalTime: 2004-01-30 15:40:14 PST
Path: 
 archiver1.google.com!news1.google.com!news2.google.com!newsfeed2.dallas1.level3.net!news.level3.com!zeus.visi.com!news-out.visi.com!green.octanews.net!news-out.octanews.net!cox.net!news-xfer.cox.net!news2.telebyte.nl!news.completel.fr!ircam.fr!freenix!enst.fr!melchior!cuivre.fr.eu.org!melchior.frmug.org!not-for-mail
From: "Alexandre E. Kopilovitch" <aek@VB1162.spb.edu>
Newsgroups: comp.lang.ada
Subject: Re: In-Out Parameters for functions
Date: Sat, 31 Jan 2004 02:39:43 +0300 (MSK)
Organization: Cuivre, Argent, Or
Message-ID: <mailman.75.1075505954.2270.comp.lang.ada@ada-france.org>
References: <6fjh109qllmjek7ud2me7k1t40so3ervmk@4ax.com>
NNTP-Posting-Host: lovelace.ada-france.org
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Trace: melchior.cuivre.fr.eu.org 1075505954 34745 80.67.180.195 (30 Jan 2004
 23:39:14 GMT)
X-Complaints-To: usenet@melchior.cuivre.fr.eu.org
NNTP-Posting-Date: Fri, 30 Jan 2004 23:39:14 +0000 (UTC)
To: comp.lang.ada@ada-france.org
Return-Path: <aek@VB1162.spb.edu>
In-Reply-To: <6fjh109qllmjek7ud2me7k1t40so3ervmk@4ax.com>;
	from "Dmitry A. Kazakov" at Thu, 29 Jan 2004 10:20:29 +0100
X-Mailer: Mail/@ [v2.44 MSDOS]
X-Virus-Scanned: by amavisd-new-20030616-p5 (Debian) at ada-france.org
X-BeenThere: comp.lang.ada@ada-france.org
X-Mailman-Version: 2.1.3
Precedence: list
List-Id: Gateway to the comp.lang.ada Usenet newsgroup
	<comp.lang.ada.ada-france.org>
List-Unsubscribe: <http://www.ada-france.org/mailman/listinfo/comp.lang.ada>,
	<mailto:comp.lang.ada-request@ada-france.org?subject=unsubscribe>
List-Post: <mailto:comp.lang.ada@ada-france.org>
List-Help: <mailto:comp.lang.ada-request@ada-france.org?subject=help>
List-Subscribe: <http://www.ada-france.org/mailman/listinfo/comp.lang.ada>,
	<mailto:comp.lang.ada-request@ada-france.org?subject=subscribe>
Xref: archiver1.google.com comp.lang.ada:5128
Date: 2004-01-31T02:39:43+03:00

Dmitry A. Kazakov wrote:

> I am afraid that allowing IN OUT parameters would be inconsistent with
> the functions of the protected objects. Provided that the prefix
> notation creeps Ada, it will be difficult to explain when X.Foo may
> change X and when not.

If we require a mark for IN OUT parameter at call cite, that is,

  F(keyword X)

then X.F will be illegal (given that

   keyword F.X

is illegal).




Alexander Kopilovitch                      aek@vib.usr.pu.ru
Saint-Petersburg
Russia