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Date: Thu, 1 Jul 2021 11:07:41 -0700 (PDT)
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Subject: Re: calling function but ignoring results
From: Gabriele Galeotti <gabriele.galeotti.xyz@gmail.com>
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On Tuesday, June 29, 2021 at 9:52:40 PM UTC+2, Jeffrey R. Carter wrote:
> On 6/29/21 9:25 PM, Matt Borchers wrote: 
> > It is not very often that ignoring a function result is okay, but I have run across many instances of the following block structure in code over the years: 
> > 
> > declare 
> > dont_care : BOOLEAN; 
> > begin 
> > dont_care := foo( x, y ); 
> > end;
> This sort of thing usually indicates a design problem.
> > Is there a Ada 202x feature to support calling functions and ignoring the result?
> If you want to use a language that allows this, then you probably shouldn't be 
> developing S/W. 
> 
> -- 
> Jeff Carter 
> "Blessed is just about anyone with a vested interest in the status quo." 
> Monty Python's Life of Brian 
> 73

Yes, you are right.
But sometimes it is necessary (especially at the H/W level) to force a read of
a peripheral register in order to obtain a specific behaviour, e.g., clear an interrupt
or latch a value previously written; in these cases what you read is useless.
G