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From: Florian Weimer <fw@deneb.enyo.de>
Newsgroups: comp.lang.ada
Subject: Re: Ada Singleton Pattern
Date: Thu, 16 Sep 2004 08:48:00 +0200
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Date: 2004-09-16T08:48:00+02:00
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* Dmitry A. Kazakov:

> But that is unrelated to the issue of whether the scope is known. If the
> scope is known, then it is quite easy to ensure that there will be no
> dangling references to the object. Ada visibility rules ensure that. If it
> is unknown, then that is not just the singleton issue.

How do you ensure that there's only a single instance of the singleton
if it's not declared at the library level? 8-)

> It is rather about pointers, smart pointers, handles, garbage
> collection etc.

Indeed, some think that these have to be part of a singleton that
deals with destruction and not just construction.