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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: A bad counterintuitive behaviour of Ada about OO
Date: Fri, 8 Aug 2014 09:43:16 +0200
Organization: cbb software GmbH
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Xref: news.eternal-september.org comp.lang.ada:21528
Date: 2014-08-08T09:43:16+02:00
List-Id: <comp.lang.ada>

On Thu, 07 Aug 2014 16:53:50 -0400, Robert A Duff wrote:

> I think types should be generic, instead.  See Eiffel.

You need some clearl  defined scope where the format parameter would be
visible:

   generic
       with ... Something;
   type Generic_Mess is ...;
   ...
   -- many lines below

   procedure Bar (Y : Generic_Mess; X : Something);

   -- even more lines after. Is this OK?
   procedure Foo (X : Something) return String;

But, surely, discriminants do the job to me.

In my view any parameters must be a value and have a proper type. If you
wanted to parametrize using types make them first-class citizens. However,
there are better design methods than type parameters and blowing up the
language with generics.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de