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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: calling function but ignoring results
Date: Wed, 30 Jun 2021 22:55:12 -0500
Organization: JSA Research & Innovation
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"Stephen Leake" <stephen_leake@stephe-leake.org> wrote in message 
news:867diayk1o.fsf@stephe-leake.org...
...
> declare
>    dont_care : BOOLEAN := foo( x, y );
>    pragma Unreferenced (dont_care);
> begin
>    null;
> end;
>
> which makes the intent clear. I don't know if Unreferenced was proposed
> as a language addition; it's not in Ada 202x.

Unreferenced controls warnings, which (with one exception) are not an Ada 
concept. So how would we describe what it does? Aspect unreferenced does 
nothing at all?? :-)

One could imagine an aspect that caused a Legality Rule against an actual 
reference, but I don't think that is what the GNAT aspect does.

                                               Randy.