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Date: Wed, 6 Apr 2016 18:28:46 -0700 (PDT)
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Subject: Re: Ada 2005,Doubly_Linked_List with Controlled parameter
From: George J <ivanov_george@list.ru>
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Xref: news.eternal-september.org comp.lang.ada:30029
Date: 2016-04-06T18:28:46-07:00
List-Id: <comp.lang.ada>

> Note that you can write something like your original code, but it has to use 
> reference counts and an overriding of Adjust in order to manage the access 
> value properly (since the container copies the objects, and thus you have to 
> support that). I think Christoph Grein's safe pointers give an example of 
> how that could be done.
> 
> In this case, the various alternatives suggested are better, since the 
> compiler/runtime is doing that complicated work and you don't have to. But 
> sometimes you need to manage an object this way, so it's valuable to know 
> that it is possible.
> 
>                               Randy.

Thanks, Randy! I've found and added Christoph Grein's "Safe pointers" materials to bookmarks to read some later.