From: John Max Skaller <skaller@ozemail.com.au>
To: Mirko Aigner <Mirko.Aigner@alcatel.de>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] prevent more than one object
Date: Thu, 03 Jul 2003 21:20:19 +1000 [thread overview]
Message-ID: <3F041173.8010903@ozemail.com.au> (raw)
In-Reply-To: <3F0304DF.1010300@alcatel.de>
Mirko Aigner wrote:
> Hi !
>
> I'm looking for a way to prevent that from a class more than one object
> is builded.
Why? Its a design error. Fix your design.
There's never any need for a singleton object,
because there is no resource for which there
cannot be more than one. I have seen (C++) designs
using singletons and they create an utter mess
because someone wrongly assumed something was
unique.
If you want one object, define the class in your
mainline, create it, and then coerce it to
a shared class type which does not provide a constructor.
--
John Max Skaller, mailto:skaller@ozemail.com.au
snail:10/1 Toxteth Rd, Glebe, NSW 2037, Australia.
voice:61-2-9660-0850
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next prev parent reply other threads:[~2003-07-03 11:20 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-02 16:14 Mirko Aigner
2003-07-02 16:43 ` Nick Name
2003-07-03 11:20 ` John Max Skaller [this message]
2003-07-03 11:36 ` Mirko Aigner
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