Operations on pointers to void.

[Karl Heuer]

In article <1990Aug16.014947.1999 at druid.uucp> darcy at druid.uucp (D'Arcy J.M. Cain) writes:
>If the language supported pointer arithmetic on void * this would be
>possible.  Note that GNU C does support it and I can't see any harm in it.

The potential harm is when somebody writes code like
	vp = (struct foo *)vp;
	... ++vp ...
without realizing that it doesn't do what was intended.  (Somebody *did*
recently post code much like this, in fact.)  This type of error will be
caught by the ANSI rule, which makes sense because `void' is an incomplete
type of undefined size.

Karl W. Z. Heuer (karl at kelp.ima.isc.com or ima!kelp!karl), The Walking Lint