From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Access types as parameters
Date: Mon, 20 Jul 2009 10:13:48 +0200
Date: 2009-07-20T10:13:47+02:00 [thread overview]
Message-ID: <1j9zxynl0weej$.54ava16yri5b$.dlg@40tude.net> (raw)
In-Reply-To: e325296c-7114-4540-9406-b7426da408dd@f18g2000prf.googlegroups.com
On Sun, 19 Jul 2009 15:57:12 -0700 (PDT), rickduley wrote:
>> So it is best to avoid the first form unless you have a particular need for
>> dispatching on an access value (which won't happen here, because the
>> designated type is class-wide).
>
> Why then does GtkAda consistently use the first form,
alas!
> i.e.:
> function My_Function (Thing : access My_Type'Class) return Positive;
> for an 'Initialize' function?
You mean
function My_Function (Thing : access Gtk_XXX_Record'Class)
return Positive;
I think it should better be
function My_Function (Thing : Gtk_XXX) return Positive;
since GtkAda has Gtk_XXX declared as access to every Gtk_XXX_Record'Class.
> It actually uses the form (this for Gtk.Button.Gtk_Button):
> procedure Initialize
> (Button : access Gtk_Button_Record'Class;
> Label : UTF8_String);
Well, this is likely a design bug. Gtk_Object_Record should have been
limited controlled with Initialize inherited from
Ada.Finalization.Limited_Controlled.
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
next prev parent reply other threads:[~2009-07-20 8:13 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-17 8:39 Access types as parameters Rick
2009-07-17 15:03 ` Adam Beneschan
2009-07-17 16:28 ` Hibou57 (Yannick Duchêne)
2009-07-17 23:25 ` rickduley
2009-07-18 1:03 ` Randy Brukardt
2009-07-19 22:57 ` rickduley
2009-07-20 0:10 ` John B. Matthews
2009-07-20 8:13 ` Dmitry A. Kazakov [this message]
2009-07-21 0:34 ` Randy Brukardt
2009-07-21 14:34 ` Adam Beneschan
2009-07-23 2:11 ` Stephen Leake
2009-08-11 23:41 ` Randy Brukardt
2009-08-12 2:22 ` Stephen Leake
2009-08-13 1:06 ` Randy Brukardt
2009-08-13 8:34 ` Niklas Holsti
2009-08-13 9:15 ` Dmitry A. Kazakov
2009-08-13 20:13 ` Niklas Holsti
2009-08-13 21:07 ` Dmitry A. Kazakov
2009-08-14 9:27 ` Niklas Holsti
2009-08-14 10:36 ` Dmitry A. Kazakov
2009-08-14 16:03 ` Niklas Holsti
2009-08-15 9:47 ` Dmitry A. Kazakov
2009-08-15 19:19 ` Niklas Holsti
2009-08-16 8:32 ` Dmitry A. Kazakov
2009-08-16 9:52 ` Niklas Holsti
2009-08-16 12:38 ` Dmitry A. Kazakov
2009-08-16 13:21 ` Niklas Holsti
2009-08-16 17:58 ` Dmitry A. Kazakov
2009-08-14 4:07 ` Randy Brukardt
2009-08-14 10:22 ` Niklas Holsti
2009-08-18 12:22 ` Stephen Leake
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