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=-0.3 required=5.0 tests=BAYES_00,
	REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news2.google.com!news3.google.com!feeder.news-service.com!xlned.com!feeder1.xlned.com!newsfeed.freenet.de!bolzen.all.de!newsfeed.ision.net!newsfeed2.easynews.net!ision!newsfeed.arcor.de!newsspool1.arcor-online.net!news.arcor.de.POSTED!not-for-mail
From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Language lawyer question: task activation
Newsgroups: comp.lang.ada
User-Agent: 40tude_Dialog/2.0.15.1
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Reply-To: mailbox@dmitry-kazakov.de
Organization: cbb software GmbH
References: 
 <ccf8fc4b-80e3-4732-84e3-16c4e2d10c3d@v39g2000pro.googlegroups.com>
 <1dusr7frk73m7.nlsagplge0hk.dlg@40tude.net>
 <wcc8wo2rncs.fsf@shell01.TheWorld.com>
Date: Fri, 20 Feb 2009 14:22:12 +0100
Message-ID: <1xz6q8ho7tkwm.ps609htosrr3$.dlg@40tude.net>
NNTP-Posting-Date: 20 Feb 2009 14:22:12 CET
NNTP-Posting-Host: a1b11def.newsspool4.arcor-online.net
X-Trace: 
 DXC=]>4m66`1]S8L2C_`koXfC54IUK<Cl32<14Fo<]lROoR1^YC2XCjHcb9B]WfOO6h4Z?DNcfSJ;bb[5FCTGGVUmh?4LK[5LiR>kg2]FK0S3JXPG2
X-Complaints-To: usenet-abuse@arcor.de
Xref: g2news2.google.com comp.lang.ada:4688
Date: 2009-02-20T14:22:12+01:00
List-Id: <comp.lang.ada>

On Thu, 19 Feb 2009 18:57:55 -0500, Robert A Duff wrote:

> "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:
> 
>>    function Func return TType is
>>    begin
>>       return X : TType do
>>          X.E1; -- Communicating with not yet returned object!
>>       end return;
>>    end Func;
> 
> This one, however, should deadlock.  The task is not activated until
> after Func returns.  Func never returns, because it is waiting on
> an entry call of a not-yet-activated task.

I.e. the behaviour of X declared of being TType depends on where it is
declared. That's great. Let us consider this:

   function Func return TType is
      function Func_Func return TType is
      begin
         return X : TType;
      end Func_Func;

      Y : TType := Func_Func;
   begin
      return Z : TType := Func_Func do
         Y.E1; -- This is not like X?
         Z.E1; -- An this?
      end return;
   end Func;

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de