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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Seeking for papers about tagged types vs access to subprograms
Date: Fri, 10 May 2013 16:27:42 +0200
Organization: cbb software GmbH
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Date: 2013-05-10T16:27:42+02:00
List-Id: <comp.lang.ada>

On Fri, 10 May 2013 16:01:46 +0200, Yannick Duchêne (Hibou57) wrote:

> Le Fri, 10 May 2013 15:54:40 +0200, Dmitry A. Kazakov  
> <mailbox@dmitry-kazakov.de> a écrit:
>>>> Human intervention is needed to handle the semantics, not because of
>>>> multiplicity of implementations. You could choose them randomly.
>>>
>>> You can't choose randomly, the program must have runtime properties as
>>> well.
>>
>> The only properties a program must have are derived from its semantics,  
>> per definition.
> 
> The time required for a computation, the memory used, are not part of the  
> semantic.

It is for RT or else irrelevant.

> Computational complexity is not semantic.

And so irrelevant.
 
>>>> That won't work. If you can derive the program (in the object language)
>>>> you don't need the object language anymore.
>>>
>>> You really can't say “it won't work”, since there are people who already
>>> do this,
>>
>> That is their problem. People do crazy things all the time.
> 
> What's crazy with this?

Because it is impossible to do. When meant seriously beyond academic
exercises, it is most likely undecidable, incomputable, halting etc.

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