Re: Enumeration representation

[Robert Dewar <robert_dewar@my-deja.com>]

In article <7rb8c3$fql$1@nnrp1.deja.com>,
  Ted Dennison <dennison@telepath.com> wrote:
> In article <37D8E3BC.175DB72C@newtech.it>,
>   Alex <busato@newtech.it> wrote:
>
> >       type Status is (a,b,c,d,e);
> >       pragma Discard_Names(Status);
> >
> >       for Status use
> >        ( a => 0,
> >          b => 20,
> >          c => 400,
> >          d => 800,
> >          e => 1600);
> >
> >        S : Status;
> > begin
> >       S := b;
> >       Put(" => " & S'img);
> > end MainEnum;
> >
> > I've compiled it with Gnat (the latest version)
> > the output of program is 1 but I was expecting another value
: 20.
> > Does  Gnat support this clause?
>
> 'img is not defined in Ada. It's a Gnat attribute. The Gnat RM
I have
> says this should be equivalent to Status'image(S), in which
case I'd
> expect to see you get a "b".

Ted, you missed the Discard_Names!!!

>
> Generally I'd expect you to see that Status'image(S) = "b",
> Status'pos(S) = 1, and To_Integer(S) = 20 (where To_Integer is
an
> instatiation of unchecked_conversion between Status and
Integer).
>
> --
> T.E.D.
>
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>


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