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[Frama-c-discuss] Semantics of \valid

As a minor remark about \valid_range, I would like to add that I find  
it always a bit odd
that I have to specify

\valid_range(a, 0, n-1)

to express an array of length n. I would prefer "\valid_range(a, 0,  
n)"  or even shorter "\valid_range(a, n)".
In other words, I think that right open ranges fit better to C.

Regards Jens

>
>
> Concerning \valid_range, I don't see why this predicate is  
> necessary. I think it just makes it more difficult for the user as  
> he has to read both the definitions of \valid and \valid_range and  
> ponder what the difference is.
>
> How about removing \valid_range? In this case, the user can define  
> his own predicate, eg \valid_range(a,l,r) <==> l < r && \valid(a+ 
> (l..r))
>
> Regards,
> Boris
>
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-- 

Dr.-Ing. Jens Gerlach
Eingebettete Systeme - EST
Tel.: +49 (0)30 6392 1841
Fax.: +49 (0)30 6392 1805
E-Mail: jens.gerlach at first.fraunhofer.de

Fraunhofer-Institut f?r Rechnerarchitektur und Softwaretechnik, FIRST
Kekul?stra?e 7
12489 Berlin
Germany
http://www.first.fraunhofer.de




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