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Newsgroups: comp.lang.ada
Date: Wed, 23 Jan 2019 12:22:08 -0800 (PST)
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Subject: Re: Problem with Position of the enumeration Type
From: Shark8 <onewingedshark@gmail.com>
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Xref: reader01.eternal-september.org comp.lang.ada:55343
Date: 2019-01-23T12:22:08-08:00
List-Id: <comp.lang.ada>

On Wednesday, January 23, 2019 at 5:30:24 AM UTC-7, Luis Ladron de Guevara Moreno wrote:
>
> the numbers 10, 11, 12... was the position of the enumeration and when i tried to use ex. 'Pos(Pos12) i obtained a  2. The position of the values cannot be modified. these values are the representation of the enum, i understand.

That's correct -- 'Pos gives you the position in the ordered-set of the enumeration, and 'Val does the inverse.

What you want is Unchecked_Conversion, to do this well you want to specify the sizes so they match up.

Type Enum_Reps is range 10..14 -- You could hide this in the private section,
  with Size => Natural'Size;   -- and have renaming-as-a-body for the actual
                               -- conversion functions.

Function Convert is new Unchecked_Conversion( E_Test, Enum_Reps );
Function Convert is new Unchecked_Conversion( Enum_Reps, E_Test );

and then just use Convert.