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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: On packages hierarchy
Date: Tue, 29 Jul 2014 20:42:55 +0100
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Date: 2014-07-29T20:42:55+01:00
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Shark8 <OneWingedShark@gmail.com> writes:

>         Function Convert is new Unchecked_Conversion
>           (Source => Light_Number, Target => GL_Enum);

Given that Light_Number'Size is set to 3 (above), and is biased into the
bargain, I don't see how this is going to work reliably? GNAT is
certainly going to give you warnings about source & target having
different sizes.

I've often used a constant array (source) of target to do conversions
like this.