From: "patrick.gunia@googlemail.com" <patrick.gunia@googlemail.com>
Subject: Re: Ada-Singleton-Why does it work like this?
Date: Wed, 25 Mar 2009 08:19:46 -0700 (PDT)
Date: 2009-03-25T08:19:46-07:00 [thread overview]
Message-ID: <7fad24bb-afca-4551-8d43-ffad304cd217@z15g2000yqm.googlegroups.com> (raw)
In-Reply-To: 21fe3b9c-776d-47b6-8eaa-bb27ba53e83f@q16g2000yqg.googlegroups.com
> generic
> type T2 (<>) is private; -- any type with or without discriminants
>
> Formally, T2 is declared to have "unknown discriminants". This is
> also the case of the singleton type. Because, to the outside world, it
> has unknown discriminants, it is unconstrained. The full view of the
> type (in the private part of the package) may or may not specify
> discriminants.
>
> --
> Ludovic Brenta.
I think that this is what made me stumble. The fact that it simply
states, that it´s unknown wether or not the type has discriminants and
that the private part can or cannot use such discriminants. These are
concepts, I haven´t seen before when using other languages. And
because the package body knows the concrete structure of my
Singleton_Type, it also knows that a discriminant is not defined and
thus not necessary for creating new variables of my type. That is why I
´m able to create a Singleton instance within the package body. Is
this right? If so, then I finally got it...
next prev parent reply other threads:[~2009-03-25 15:19 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
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 [this message]
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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