From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Full view of a private partial view cannot be a subtype
Date: Sun, 17 Dec 2017 16:39:16 +0100
Date: 2017-12-17T16:39:16+01:00 [thread overview]
Message-ID: <p16332$1rfb$1@gioia.aioe.org> (raw)
In-Reply-To: 83982113-349e-4443-b457-e63d749ad42a@googlegroups.com
On 2017-12-17 16:26, Jere wrote:
> my assertion is that:
>
> subtype Thing is Core_Pkg.Thing;
>
> procedure Do_Something(The_Thing : in out Thing)
> renames Core_Pkg.Do_Something;
>
>
> is easier to both maintain and read than:
>
> type Thing is new Core_Pkg.Thing with null record;
>
> procedure Do_Something(The_Thing : in out Thing);
But these are two semantically different concepts. Ada's subtype
declares an equivalent type [it inherits everything from and exports
everything to the base]. Ada's new tagged type declares a new instance
of a class. It only inherits.
I don't understand how can you exchange one for another.
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
next prev parent reply other threads:[~2017-12-17 15:39 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-03 2:14 Full view of a private partial view cannot be a subtype Jere
2017-12-03 12:01 ` Jeffrey R. Carter
2017-12-03 13:33 ` Jere
2017-12-03 14:34 ` Jeffrey R. Carter
2017-12-03 17:44 ` Robert Eachus
2017-12-03 18:50 ` Simon Wright
2017-12-03 22:10 ` Robert Eachus
2017-12-03 19:03 ` Jeffrey R. Carter
2017-12-03 22:23 ` Jere
2017-12-04 8:25 ` Dmitry A. Kazakov
2017-12-04 18:04 ` Jeffrey R. Carter
2017-12-04 20:41 ` Jere
2017-12-04 21:48 ` Jeffrey R. Carter
2017-12-05 8:20 ` Dmitry A. Kazakov
2017-12-05 18:16 ` Jeffrey R. Carter
2017-12-05 20:39 ` Dmitry A. Kazakov
2017-12-05 21:38 ` Jeffrey R. Carter
2017-12-05 12:35 ` Jere
2017-12-05 18:40 ` Jeffrey R. Carter
2017-12-06 12:54 ` Jere
2017-12-06 18:03 ` Jeffrey R. Carter
2017-12-05 20:22 ` Randy Brukardt
2017-12-05 15:27 ` Shark8
2017-12-05 18:50 ` Jeffrey R. Carter
2017-12-05 20:59 ` Randy Brukardt
2017-12-05 22:43 ` Shark8
2017-12-07 0:52 ` Randy Brukardt
2017-12-05 20:16 ` Randy Brukardt
2017-12-05 21:29 ` Jeffrey R. Carter
2017-12-07 0:04 ` Randy Brukardt
2017-12-04 20:49 ` Randy Brukardt
2017-12-05 12:56 ` Jere
2017-12-05 20:12 ` Randy Brukardt
2017-12-17 15:26 ` Jere
2017-12-17 15:39 ` Dmitry A. Kazakov [this message]
2017-12-18 22:47 ` Randy Brukardt
2017-12-19 1:22 ` Jere
2017-12-19 23:16 ` Randy Brukardt
2017-12-19 1:01 ` Jere
2017-12-19 9:08 ` Dmitry A. Kazakov
2017-12-19 13:08 ` Jere
2017-12-19 13:27 ` Dmitry A. Kazakov
2017-12-19 19:10 ` Stephen Leake
2017-12-18 20:45 ` Stephen Leake
2017-12-18 22:54 ` Randy Brukardt
2017-12-19 1:08 ` Jere
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