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From: Stephen Leake <stephen_leake@stephe-leake.org>
Newsgroups: comp.lang.ada
Subject: Re: calling function but ignoring results
Date: Sat, 03 Jul 2021 03:42:41 -0700
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"Randy Brukardt" <randy@rrsoftware.com> writes:

> "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. 

This could be another exception, or we could make it 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.

It does give you a warning if the variable is referenced.

-- 
-- Stephe