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From: nblanpain@hotmail.com
Newsgroups: comp.lang.ada
Subject: Re: Aliased
Date: 16 Jun 2005 07:03:09 -0700
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Date: 2005-06-16T07:03:09-07:00
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So this is my sources and the compilation error :

------ Container.ads
generic
   type T_Item is private;
   Static_Size : Integer;
package Container is
   type T_Array is array (Integer range <>) of T_Item;
   type A_Array is access all T_Array;
   type T_Container is tagged record
      Obj_Array : aliased T_Array (1..Static_Size);
      Ptr_Array : A_Array;
   end record;
   procedure Initialize (This : in out T_Container; Dynamic_Size : in
Integer);
   function P_Array (This : in T_Container) return A_Array;
end Container;

------ Container.adb
package body Container is
   procedure Initialize (This : in out T_Container; Dynamic_Size : in
Integer) is
   begin
      if Dynamic_Size /= 0 then
         This.Ptr_Array := new T_Array (1.. Dynamic_Size);
     elsif Static_Size /= 0 then
        This.Ptr_Array := This.Obj_Array'Access; --- Compilation Error
     end if;
   end Initialize;
   function P_Array (This : in T_Container) return A_Array is
   begin
      return This.Ptr_Array;
   end P_Array;
end Container;

-- Compilation Error : Object subtype must statically match designated
subtype. No local pointer cannot point to local object.

I have tried to solve this problem using Unchecked_Access or To_Pointer
of System. I have found no solution.
Have you a solution to my problem?

Thanks,