Operations on pointers to void.

[Stephen Clamage]

john at basho.uucp (John Lacey) writes:

>What operations are legal on pointers to void?  ...

You may cast to or from type void*.
You may assign, initialize, or pass as a parameter any pointer to an object
of type void*, and vice versa.
You may not dereference an object of type void*.

>But, what about pointer arithmetic?  And it that is legal, what size object
>does a void * point to?

You cannot do pointer arithmetic with an object of void*.  No object may
have type void, so no size can be associated with it.  It is helpful
to think of void as "not anything", rather than "zero".  Void* is a
special case, and you can think of it as "pointing to something unspecified".
-- 

Steve Clamage, TauMetric Corp, steve at taumet.com