void
- and Function-Pointers
In GNU C, addition and subtraction operations are supported on pointers to
void
and on pointers to functions. This is done by treating the
size of a void
or of a function as 1.
A consequence of this is that sizeof
is also allowed on void
and on function types, and returns 1.
The option `-Wpointer-arith
' requests a warning if these extensions
are used.