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From: Jean-Pierre Rosen <rosen@adalog.fr>
Subject: Re: Ada-Singleton-Why does it work like this?
Date: Wed, 25 Mar 2009 11:29:14 +0100
Date: 2009-03-25T11:29:14+01:00	[thread overview]
Message-ID: <v11dqg.sls.ln@hunter.axlog.fr> (raw)
In-Reply-To: <19a1c6cf-4e4d-402c-902d-3ea2055b4779@c11g2000yqj.googlegroups.com>

patrick.gunia@googlemail.com a �crit :
> [..] Which mechanism is responsible for
> prohibiting this to my singleton class?
Very simple: variables of this type have to be initialized. However, the
type is private (you cannot provide a value in the form of an aggregate
f.e.), and there is no function that returns a value of the type.

=> There is no way to have a value of the type
=> There is no possible initialization value
=> You cannot declare a variable of the type
QED

Of course, in the package /body/ you see the full declaration, that's
why you are allowed to declare a variable there.

-- 
---------------------------------------------------------
           J-P. Rosen (rosen@adalog.fr)
Visit Adalog's web site at http://www.adalog.fr



  reply	other threads:[~2009-03-25 10:29 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-03-24 19:01 Ada-Singleton-Why does it work like this? patrick.gunia
2009-03-24 19:10 ` Pascal Obry
2009-03-24 20:47 ` Jeffrey R. Carter
2009-03-25  0:10   ` Martin
2009-03-25  0:41     ` Jeffrey R. Carter
2009-03-25  9:30     ` Dmitry A. Kazakov
2009-03-26  8:55       ` Martin
2009-03-26  9:28         ` Dmitry A. Kazakov
2009-03-26 13:39           ` Maciej Sobczak
2009-03-26 14:07             ` Georg Bauhaus
2009-03-26 14:33               ` Dmitry A. Kazakov
2009-03-26 15:22                 ` Georg Bauhaus
2009-03-26 16:31                   ` Dmitry A. Kazakov
2009-03-26 14:28             ` Dmitry A. Kazakov
2009-03-26 22:00               ` Maciej Sobczak
2009-03-27 10:02                 ` Dmitry A. Kazakov
2009-03-25 22:29   ` sjw
2009-03-24 20:52 ` Ludovic Brenta
2009-03-25  9:59   ` patrick.gunia
2009-03-25 10:29     ` Jean-Pierre Rosen [this message]
2009-03-25 11:26     ` Georg Bauhaus
2009-03-25 11:49       ` patrick.gunia
2009-03-29  7:29     ` Jacob Sparre Andersen
2009-03-24 21:21 ` Dmitry A. Kazakov
2009-03-25 10:07   ` patrick.gunia
2009-03-25 10:57     ` patrick.gunia
2009-03-25 11:40       ` Georg Bauhaus
2009-03-25 11:46       ` Ludovic Brenta
2009-03-25 11:55         ` patrick.gunia
2009-03-25 14:10         ` patrick.gunia
2009-03-25 14:40           ` Ludovic Brenta
2009-03-25 15:16             ` Adam Beneschan
2009-03-25 15:19             ` patrick.gunia
2009-03-25 16:52               ` Georg Bauhaus
2009-03-25 11:10     ` Dmitry A. Kazakov
2009-03-25 11:37       ` patrick.gunia
2009-03-25 12:07         ` Ludovic Brenta
2009-03-25 15:00         ` Robert A Duff
2009-03-25 11:17     ` Jean-Pierre Rosen
2009-03-26  9:04       ` Martin
2009-03-25 11:38     ` Ludovic Brenta
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