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From: Jeffrey Carter <spam.jrcarter.not@spam.not.acm.org>
Newsgroups: comp.lang.ada
Subject: Re: Pop function
Date: Thu, 15 Dec 2011 12:57:47 -0700
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Date: 2011-12-15T12:57:47-07:00
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On 12/15/2011 01:38 AM, Dmitry A. Kazakov wrote:
> On Wed, 14 Dec 2011 17:34:57 -0700, Jeffrey Carter wrote:
>
>> Your public interface should never use access types.
>
> Yes, but since list as a data structure has the semantics of objects
> accessed by references it would make sense to have this reflected in the
> interface. But of course the list element must be
>
>     type List_Item is access Integer; -- Only the data, no other mess

No, a public interface should never use access types, ever. Hiding those is what 
abstraction is about. Any public interface that uses access types is poorly 
designed.

-- 
Jeff Carter
"I would never want to belong to any club that
would have someone like me for a member."
Annie Hall
41

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