From: "G.B." <bauhaus@notmyhomepage.invalid>
Subject: Re: A function that cannot be called?
Date: Thu, 18 Oct 2018 21:36:00 +0200
Date: 2018-10-18T21:36:00+02:00 [thread overview]
Message-ID: <pqanbb$hl5$1@dont-email.me> (raw)
In-Reply-To: <7ab688d0-b6b8-459c-b5b7-39b6c35daad2@googlegroups.com>
On 18.10.18 19:03, AdaMagica wrote:
> Am Donnerstag, 18. Oktober 2018 14:14:32 UTC+2 schrieb G.B.:
>> package What is
>>
>> type Void (<>) is private;
>>
>> function Impossible (X : T) return Void;
>>
>> private
> ...
>> end What;
>
> Of course this is possible. Declarations of objects of type Void must have an initial value, which can be provided via the "constructor" Impossible:
>
> X: Void := Impossible (T0);
Impossible needs to return a value. But a returned object can
neither be declared nor a value constructed, since type Void
has an unknown discriminant so that no initial constraint
can be given anywhere.
next prev parent reply other threads:[~2018-10-18 19:36 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-18 12:14 A function that cannot be called? G.B.
2018-10-18 15:33 ` Stefan.Lucks
2018-10-18 20:21 ` G.B.
2018-10-18 20:57 ` Niklas Holsti
2018-10-19 7:15 ` Dmitry A. Kazakov
2018-10-19 13:55 ` G.B.
2018-10-19 15:31 ` Dmitry A. Kazakov
2018-10-18 17:03 ` AdaMagica
2018-10-18 19:36 ` G.B. [this message]
2018-10-18 21:30 ` Randy Brukardt
2018-10-19 14:00 ` G.B.
2018-10-19 15:39 ` Dmitry A. Kazakov
2018-10-20 1:34 ` Randy Brukardt
2018-10-20 9:14 ` G.B.
2018-10-20 11:13 ` Simon Wright
2018-10-20 14:11 ` Dmitry A. Kazakov
2018-10-21 9:25 ` G.B.
2018-10-21 9:07 ` G.B.
2018-10-21 9:51 ` Dmitry A. Kazakov
2018-10-21 10:57 ` Niklas Holsti
2018-10-21 18:00 ` Simon Wright
2018-10-19 8:48 ` AdaMagica
2018-10-19 11:15 ` G.B.
2018-10-19 17:06 ` AdaMagica
2018-10-19 19:57 ` G.B.
2018-10-19 22:06 ` Jere
2018-10-21 10:14 ` G.B.
2018-10-21 11:30 ` Egil H H
2018-10-23 11:45 ` G.B.
2018-10-23 14:35 ` Jere
2018-10-23 14:57 ` Dmitry A. Kazakov
2018-10-23 17:49 ` G.B.
2018-10-23 19:25 ` Dmitry A. Kazakov
2018-10-24 7:35 ` G.B.
2018-10-24 8:14 ` Dmitry A. Kazakov
2018-10-19 18:19 ` marciant
2018-10-19 18:22 ` marciant
2018-10-20 1:36 ` Randy Brukardt
2018-10-20 2:54 ` marciant
2018-10-19 20:25 ` Shark8
2018-10-19 23:28 ` marciant
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