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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: A few questions
Date: Mon, 02 Nov 2015 18:48:15 +0000
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Date: 2015-11-02T18:48:15+00:00
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Simon Wright <simon@pushface.org> writes:

> I'd have liked to support
>
>    for D in Period loop

Oops, I meant "for D of Period", i.e.

   for D : Ada.Calendar.Time of Period loop
      ...

but you'd need

   function Constant_Reference
     (Container : aliased Date_Container;
      Position  : Cursor) return Constant_Reference_Type;

returning

   type Constant_Reference_Type
      (Element : not null access constant Ada.Calendar.Time) is private
   with
      Implicit_Dereference => Element;

which is clearly meant for actual containers and here would require - I
think - allocating an Ada.Calendar.Time, and of course freeing it
eventually.

Shame, it makes it tricky to support lazy evaluation. But perhaps we
shouldn't want to ...