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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Generic-Package Elaboration Question / Possible GNAT Bug.
Date: Wed, 23 Nov 2011 09:44:40 +0100
Organization: cbb software GmbH
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Date: 2011-11-23T09:44:40+01:00
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On Wed, 23 Nov 2011 01:07:25 +0100, Georg Bauhaus wrote:

> Thus if there is
> 
>     procedure ...
>        with post => postcondition;
> 
> then, yes, it should probably be understood to mean
> 
>     procedure ...
>        with post => raise when not postcondition;
> 
> is there substantial difference in behavior, regarding both that
> of the program and that of the programmer?

It is lousy language design placing implementation (executable code
ensuring the desired behavior, e.g. raising exception) into declarations.
The proper one is:

   procedure ...
      raise Contraint_Error; -- I don't tell you when and how

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