Re: Enumeration type - GNAT 3.15p bug?

["Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>]

On 17 Aug 2006 04:49:55 -0700, Gerd wrote:

> I've found some misbehaviour of enumeration types and runtime checking.
> Assigning constant values is checked at compile time. For the dynamic
> assignment below (line 8) I would expect that an exception is raised,
> but nothing happens. I generated an assembly listing and looked at the
> code - the runtime check code is generated, but it seems to have a bug
> (wrong address calculation).
> 
> Does someone know more about it?
> - Is there really a bug in GNAT 3.15p?
> - Did I do some misinterpretation?
> 
> As far as I know the 3.15p was the last officially released version
> from AdaCore, wasn't it?
> 
>  1: procedure JEnumXa is
>  2:   type ex is (Rot, Gruen, Gelb);
>  3:
>  4:   x : ex;
>  5:
>  6:   procedure ABC ( i : Integer) is
>  7:   begin
>  8:     x := ex'VAL(i);
>  9:   end ABC;
> 10: begin
> 11: null;
> 12:   x := Rot;
> 13:   x := Gruen;
> 14:   x := ex'SUCC (X);
> 15:   -- x := ex'VAL (99);  -- compiletime error
> 16:   ABC (99);
> 17: end JEnumXa;

GNAT 3.15p (Windows):

   raised CONSTRAINT_ERROR : jenumxa.adb:8 overflow check failed

Is it possible that you have suppressed checks?

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de