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Date: Mon, 13 Sep 2010 17:12:04 +0200
From: Georg Bauhaus <rm.dash-bauhaus@futureapps.de>
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Subject: Re: Securing type extensions (was: Preventing type extensions)
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Date: 2010-09-13T17:12:04+02:00
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On 13.09.10 11:42, Dmitry A. Kazakov wrote:

>> If a system must reflect trust and mistrust, shouldn't the
>> mechanics of a language support both?
> 
> In Ada it is called visibility.

An event driven parser (or GUI) as an example: the gears of
the parser (or event loop) interact with the prim ops of
a user defined type.  The type will have been derived from
some abstract type that I provided.

How will Ada's visibility rules help me trust the ops?


Georg