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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Making sense of predicates
Date: Tue, 22 Oct 2013 10:11:09 +0200
Organization: cbb software GmbH
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Date: 2013-10-22T10:11:09+02:00
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On Tue, 22 Oct 2013 00:14:27 -0700 (PDT), Shark8 wrote:

>> Well, predicates were not supposed to work in an intelligent way, so why
>> not to add a kind that will?
> 
> I think they are supposed to work in an intelligent way, though perhaps
> they're not as nice as compile-time/static checks.

It is not about checks. Mathematically there might be no difference, but
for the language there is a great difference between inferred and
manifested properties of types. The power of the former is very limited.

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