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From: Lutz Donnerhacke <lutz@iks-jena.de>
Newsgroups: comp.lang.ada
Subject: Re: Errornous String instantiation
Date: Wed, 23 Jul 2003 14:03:29 +0000 (UTC)
Organization: IKS GmbH Jena
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* Lutz Donnerhacke wrote:
> Sorry for posting this problem in such an early stage, but it's a moving
> target where small modifications of the source the problem cause to disappear.
> So I present a short (but not buggy) example of the source skeleton in
> question and show you some results of the real data.

Current workaround:

vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
  package Top is
     type Constant_String is access constant String;
     type Constant_String_Array is array(Positive range <>) of Constant_String;
  end Top;
  
+ with Top;
+
  package Constants is
     t1 : aliased constant String := "Test";
     t2 : aliased constant String := "A longer test string";
+
+    a  : constant Top.Constant_String_Array := (t1'Access, t2'Access);
  end Constants;
  
  generic
     data : Constant_String_Array;
  package Top.Generic_Package is
     pragma Elaborate_Body;
  end Top.Generic_Package;
  
  with Top.Generic_Package, Constants;
- use Constants;

- package MyPackage is new Top.Generic_Package((t1'Access, t2'Access));
+ package MyPackage is new Top.Generic_Package(Constants.a);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

This requires the compiler to instantiate t1 in the scope of Constants for
external use. And this is done correctly.