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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: enumeration type
Date: Mon, 27 Sep 2004 15:43:55 +0200
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Date: 2004-09-27T15:43:55+02:00
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On Mon, 27 Sep 2004 12:51:27 +0000 (UTC), Georg Bauhaus wrote:

> Peter Hermann <ica2ph@sinus.csv.ica.uni-stuttgart.de> wrote:
>  
>: type fuzzy is (false,true,maybe);
>: 
>: and now a final joke:
>: 
>:> if X = Standard.Boolean.True then
>: 
>: (-:         if x then           :-)
> 
> :)
> 
> If you don't dislike writing down what you want to say,
> you can use qualified notation:
> 
> procedure p is
>    type Ternary_Logical is (True, Maybe, False);
>    v: Ternary_Logical;
>    b: Boolean;
> begin
>    if b = Boolean'(True) and v = Ternary_Logical'(True) then
>       null;
>    end if;
> end p;

What for?

Either

   if b = True and v = True then ...
or
   if b and v = True then ...

is unambiguous.

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