From: Christoph Grein <Christoph.Grein@eurocopter.com>
Cc: comp.lang.ada@ada-france.org
Subject: Re: generic parameter Copy for primitifs types.
Date: Mon, 27 Jun 2005 06:28:17 +0200
Date: 2005-06-27T06:28:17+02:00 [thread overview]
Message-ID: <mailman.100.1119847370.17633.comp.lang.ada@ada-france.org> (raw)
In-Reply-To: 1119544911.159343.288010@g43g2000cwa.googlegroups.com
nblanpain@hotmail.com wrote:
>Hello,
>
>this is my problem :
>
>-----
>generic
>type T_Item is private;
>with procedure Copy (Left : in out T_Item; Right : in T_Item);
>package Toto is
>...
>end Toto;
>------
>
>At instanciation, for T_Item = Integer for example, is there a methode
>to take for Copy => ":=". Must I redefined Copy ? Can I say that, by
>default, take ":=" ?
>
As you should know by now from all the answers there is no way to avoid
defining Copy.
As also others have pointed out, T_Item should probably be limited
private. As it stands,
Toto has := and Copy:
package body Toto is
...
X := Y; -- Do you really want both?
Copy (X, Y); -- which to use?
If T_Item is limited private, := is no longer available in Toto.
What you perhaps don't know is that the actual type for a limited formal
type need not be limited. If you say
generic
type T_Item is limited private;
then you can take any definite type as actual.
prev parent reply other threads:[~2005-06-27 4:28 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-23 16:41 generic parameter Copy for primitifs types nblanpain
2005-06-23 17:47 ` Marc A. Criley
2005-06-23 17:54 ` Dmitry A. Kazakov
2005-06-23 19:41 ` nblanpain
2005-06-23 23:44 ` Marius Amado Alves
2005-06-28 10:30 ` Matthew Heaney
2005-06-28 11:21 ` Marius Amado Alves
2005-06-24 7:28 ` Dmitry A. Kazakov
2005-06-24 11:45 ` Marius Amado Alves
2005-06-24 14:53 ` Dmitry A. Kazakov
2005-06-24 15:11 ` Marius Amado Alves
2005-06-25 15:05 ` Martin Krischik
2005-06-23 18:30 ` Björn Persson
2005-06-23 19:39 ` nblanpain
2005-06-23 19:52 ` Marc A. Criley
2005-06-24 3:10 ` Jeffrey Carter
2005-06-27 4:28 ` Christoph Grein [this message]
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox