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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: about the new Ada 2012 pre/post conditions
Date: Sun, 24 Jun 2012 18:06:28 +0200
Organization: cbb software GmbH
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Date: 2012-06-24T18:06:28+02:00
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On Sun, 24 Jun 2012 16:59:55 +0200, Georg Bauhaus wrote:

> On 23.06.12 13:01, Dmitry A. Kazakov wrote:
>> Compare: a contract violation is an *unbounded ERROR*.
> 
> Do you mean, I should imagine a contract violation that,
> when checks are turned off, result in erroneous execution?

The effect of contract violation is unbounded because not contracted.

When you say that something behaves in a certain way under specified
conditions, e.g. raises exception when out of range, that is the contract.
 
1. violation => nothing guaranteed
2. effect is bounded => these bounds are in the contract

1+2 = contract violation is necessarily *equivalent* to undefined behavior.

What is so difficult about this?

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