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From: Sami Evangelista <sami.evangelista@wanadoo.fr>
Newsgroups: comp.lang.ada
Subject: Re: generic packages
Date: Thu, 11 Jul 2002 15:41:21 +0200
Organization: Conservatoire National des Arts et Metiers
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thank you for your response, but does the following code compile?

=======================================================
--file generic_set.ads

generic
      type Element is private;
      with function "=" (E1, E2 : in Element) return boolean;
package Generic_Set is
      type Set_Record is private;
      type Set is private;
      generic
           with package a_set is new generic_set(<>);
           with package b_set is new generic_set(<>);
           with function a_to_b(A : in a_set.element) return 

                                               b_set.element;
      function a_set_to_b_set(the_set : in a_set.set) return b_set.set;


private
      type Set is access Set_record;
      type Set_record is record
         El : Element;
         Others_Els : Set;
      end record;
end Generic_Set;
=======================================================

Sami Evangelista




SteveD wrote:

> "Sami Evangelista" <sami.evangelista@wanadoo.fr> wrote in message
> news:3D2ADF27.8070502@wanadoo.fr...
> [snip]
> 
>>now i want to declare a generic function which take a A set and return a
>>B set according to a function wich take a A element and return B
>>element. I have tried this in the generic_set.ads file, but gnat crashes
>>
> 
> The following code compiles with no crashes using gnat-3.14p-nt.exe on
> Windows 2000.
> =======================================================
> procedure test is
> generic
>     type Element is private;
>     with function "=" (E1, E2 : in Element) return boolean;
> package Generic_Set is
>     type Set_Record is private;
>     type Set is private;
> --     .....
> private
>     type Set is access Set_record;
>     type Set_record is record
>        El : Element;
>        Others_Els : Set;
>     end record;
> end Generic_Set;
> 
> generic
>       with package a_set is new generic_set(<>);
>       with package b_set is new generic_set(<>);
>       with function a_to_b(A : in a_set.element) return b_set.element;
> function a_set_to_b_set(the_set : in a_set.set) return b_set.set;
> 
> function a_set_to_b_set(the_set : in a_set.set) return b_set.set is
>   dummy : b_set.Set;
> begin
>   return dummy;
> end a_set_to_b_set;
> 
> begin
>   null;
> end test;
> ==============================================
> It's not very useful as it is, I just wanted to reproduce your crash.
> 
> SteveD
> 
> 
> 
> 
>