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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: A few questions
Date: Thu, 12 Nov 2015 20:02:20 +0000
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Date: 2015-11-12T20:02:20+00:00
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"Randy Brukardt" <randy@rrsoftware.com> writes:

> "Simon Wright" <simon@pushface.org> wrote in message 
> news:lyziyskeu2.fsf@pushface.org...

>> Oh, it should have been
>>
>>   for P in F552A00_Prime_Numbers.Prime_Number_Set'(Max_Value => 
>> 31).Iterate
>>      loop
>
> I probably would have made type Prime_Number_Set directly the iterator
> type (I don't see any other need for it), which would get rid of the
> need for the ".Iterate". An iterator doesn't necessarily have to have
> anything to do with a container!

Hmm.

A Prime_Number_Set is a new Prime_Number_Iterator.Forward_Iterator;
Iterate returns a Prime_Number_Iterator.Forward_Iterator'Class.

I tried without the .Iterate, as before, and with

   for P in Prime_Number_Set'Class (Prime_Number_Set'(Max_Value => 30))

(just in case) and as before got the 'expected a discrete type' error.

Perhaps this is a GNAT bug?

On the other hand, why did Brad include function Iterate?