Re: Ada Address = C pointer ?

["M. A. Alves" <maa@liacc.up.pt>]

On Tue, 30 Oct 2001, Matthew Heaney wrote:
> "M. A. Alves" <maa@liacc.up.pt> wrote in message
> news:mailman.1004446456.21280.comp.lang.ada@ada.eu.org...
> > However, I am still not sure of the equivalence between null (a value of
> > Pointer) and NULL (C), i.e. is it garanteed that if the C function returns
> > NULL get_long_array returns null?
>
> Yes.  See RM95 B3.2 (17).

Yes, I know that null = NULL seems an obvious interpretation of
"C-compatible", but the RM is not known for relying on the obvious.

So, either way (Interfaces.C.Pointers vs.
System.Address_To_Access_Conversions), _assumptions_ are made (by the
programmer).

But I agree a Pointers idiom is a viable, perhaps better, alternative to a
System one. Perhaps I'll change my code some day.

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