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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: A function that cannot be called?
Date: Fri, 19 Oct 2018 17:39:53 +0200
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Xref: reader02.eternal-september.org comp.lang.ada:54655
Date: 2018-10-19T17:39:53+02:00
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On 2018-10-19 16:00, G.B. wrote:

> Not having any objects at all needs to be a feature of the
> Ada language's type system, at least for this kind of competition.

Why?

The purpose of the (<>) hack is not to prevent object existence, it is 
for ensuring proper initialization of.

What Ada language needs is proper constructors.

Non-existent objects do not exist merely because they don't ...

> (Hence hiding the full type in a private nest with no body.)
> 
> The members of the functionist faction will turn their eyes
> towards the cieling in dispair:
> it is these weird functions involving uninhabited types that have
> turned out to be essential for the interplay between logicians
> and computer scientists discovering practical solutions. For
> example, what about a type system that guarantees termination?

Termination of what? It may come as a revelation for FP folks, but a 
simple power plug guaranties ultimate termination of whatever program 
... (:-))

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de