dolfin team mailing list archive

[Andre Massing <massing@xxxxxxxxx>]

Den 14.01.11 15.03, skrev Anders Logg:
> Interesting, what exactly does that mean?
>
> We have a double const in the UFC interface:
>
>    const double * const * w
>
> so what does that triple const do? Is it possible to be that const?

I would say it makes the pointer constant, meaning you cannot change the 
address it points to. It is just an iteration of
const double * p , (= double const * p) which is a pointer to a constant 
double, so value cannot changed,
double * const p , which is a constant pointer to a double (address 
cannot changed)
and
double const * const p (const value and address)
So one more * can give you more const :) a constant pointer
to constant pointers of constant double. And I think I am constantly 
using the word constant right now, so I should probably stop here :)
--
Andre


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> Anders
>
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--
André Massing       		email: massing@xxxxxxxxx
Ph.D. student			mobile: +47 469 57 401
Simula Research Laboratory
NO-1367 Fornebu, Norway