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From: "e.coli" <maurizio.ferracini@gmail.com>
Newsgroups: comp.lang.ada
Subject: Unchecked_Conversion and task pointer.
Date: 7 Jul 2005 08:50:55 -0700
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Date: 2005-07-07T08:50:55-07:00
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look at this exemple:
----------------------------------------------------
with Ada.Unchecked_Conversion;
with Ada.Text_Io;

procedure Main is

   task type Cain is
      entry Who_Are_You;
   end Cain;

   task type Abel is
      entry Who_Are_You;
   end Abel;

   type Ptr_Cain is access Cain;
   type Ptr_Abel is access Abel;

   task body Cain is
   begin
      loop
         accept Who_Are_You;
         Ada.Text_Io.Put_Line(Item => "I'm Cain");
      end loop;
   end Cain;


   task body Abel is
   begin
      loop
         accept Who_Are_You;
         Ada.Text_Io.Put_Line(Item => "I'm Abel");
      end loop;
   end Abel;


   function Mess_Up is
   new Ada.Unchecked_Conversion
      (
      Source => Ptr_Cain,
      Target => Ptr_Abel);

   X : Ptr_Cain;
   Y : Ptr_Abel;

begin
   X:= new Cain;
   Y:= new Abel;
   X.Who_Are_You;
   Y.Who_Are_You;
   Y:=Mess_Up(X);
   -- where are your brother?
   X.Who_Are_You;
   Y.Who_Are_You;
end Main;
------------------------------------------------

how work Unchecked_Conversion with task pointer?
the behavior depend by the compiler?

thaks