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From: "Vinzent Hoefler" <nntp-2010-10@t-domaingrabbing.de>
Newsgroups: comp.lang.ada
Subject: Re: Discriminants of tagged types
Date: Fri, 29 Oct 2010 20:59:17 +0200
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Date: 2010-10-29T20:59:17+02:00
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On Thu, 28 Oct 2010 10:50:51 +0200, Maciej Sobczak <see.my.homepage@gmai=
l.com> wrote:

> On 28 Pa=C5=BA, 09:53, "Dmitry A. Kazakov" <mail...@dmitry-kazakov.de>=

> wrote:
>
>> > Because tagged types usually represent entities that are bound to s=
ome
>> > resources
>>
>> This has nothing to do with copying. Consider a handle of a resource,=
 e.g.
>> HWND as an example. It is bound to the resource, nevertheless it is
>> copyable.
>
> Just like a file descriptor. Yet, there is no reason for these things
> to be polymorphic.

But they already are.

Sometimes they are files, sometimes devices, sometimes sockets, ...


Vinzent.

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