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Newsgroups: comp.lang.ada
Subject: Re: access assignation. Aliasing problems?
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From: Stephen Leake <stephen_leake@stephe-leake.org>
Date: Sat, 02 Feb 2008 05:37:46 -0500
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Date: 2008-02-02T05:37:46-05:00
List-Id: <comp.lang.ada>

"Jeffrey R. Carter" <spam.jrcarter.not@acm.nospam.org> writes:

> Javi wrote:
>>          L.Last := new ListNode'(Item => It, next => null);
>>          L.First := L.Last; -- this fails, L.First and L.Last are both
>> the same type access ListNode
>
> I suspect you're saying that type List has components such as
>
> type List is record
>     First : access Listnode;
>     Last  : access Listnode;

In particular, these are _not_ the "same type". In C, they would be,
because there "same type" means "same contents". In Ada, "same type"
means "same name". The types here have _no_ name; they are
anonymous. So they are not the same.

-- 
-- Stephe