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From: mheaney@on2.com (Matthew Heaney)
Newsgroups: comp.lang.ada
Subject: Re: Errornous String instantiation
Date: 21 Jul 2003 09:19:46 -0700
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Lutz Donnerhacke <lutz@iks-jena.de> wrote in message news:<slrnbhnguj.oa.lutz@taranis.iks-jena.de>...

Have you tried using the categorization pragmas?


> package Constants is
     pragma Pure;  --or else Preelaborate;     

>    t1 : aliased constant String := "Test";
>    t2 : aliased constant String := "A longer test string";
> end Constants;
> 
> package Top is
     pragma Preelaborate;

>    type Constant_String is access constant String;
>    type Constant_String_Array is array(Positive range <>) of Constant_String;
> end Top;
> 
> generic
>    data : Constant_String_Array;
> package Top.Generic_Package is
>    pragma Elaborate_Body;
> end Top.Generic_Package;
> 
> with Ada.Text_IO;
> use Ada.Text_IO;
> 
> package body Top.Generic_Package is
> begin
>    for i in data'Range loop
>       Put_Line("data (" & i'Img & " ) =" & data(i)'Length'Img);
>    end loop;
>    for i in data'Range loop
>       Put_Line("data (" & i'Img & " ) =" & data(i)'Length'Img);
>    end loop;
> end Top.Generic_Package;
> 
> with Top.Generic_Package, Constants;
> use Constants;

pragma Elaborate_All (Top.Generic_Package);
pragma Elaborate_All (Contants);

> 
> package MyPackage is new Top.Generic_Package((t1'Access, t2'Access));


> Did anybody came across this type of bug? Any idea how to solve the problem?

I don't know whether including the categorization pragmas will help
any, but it can't hurt.

Are you using GNAT?  Did you try the -gnatwl switch?

-Matt