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From: eachus@spectre.mitre.org (Robert I. Eachus)
Subject: Re: Definition of "aliased"
Date: 1998/10/28
Message-ID: <EACHUS.98Oct28151641@spectre.mitre.org>#1/1
X-Deja-AN: 406045541
References: <m37lxo6pii.fsf@mheaney.ni.net> <7127j9$h36$1@nnrp1.dejanews.com>
 <m3zpaj621f.fsf@mheaney.ni.net> <714ll9$ft8$1@nnrp1.dejanews.com>
Organization: The Mitre Corp., Bedford, MA.
Newsgroups: comp.lang.ada
Date: 1998-10-28T00:00:00+00:00
List-Id: <comp.lang.ada>

In article <714ll9$ft8$1@nnrp1.dejanews.com> dennison@telepath.com writes:

 > Cool! I don't suppose that trick works for tasks as well? Being able to
 > display Task_Type'Storage_Size would sure be handy inside of a Storage_Error
 > exception handler...

   Should work fine, inside a task the name denotes the current
instance, see RM 8.6(17) and RM 9.1(19).  If you need to name a type
itself inside its definition you have to create a subtype outside.
(Note: Running a program containing the following task type may be
hazardous to your computer's health.)

    task type Rabbit is end Rabbit;
    subtype Bunny is Rabbit;
    task body Rabbit is
      Child1, Child2: Bunny;
    begin delay 1.0; end Rabbit;

    Don't let this example convince you that you never want to use this
feature.  A much saner use is to create a backup task that doesn't
start running (and create its own backup) until the task that created
it dies.

--

					Robert I. Eachus

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