| Using the GNU Compiler Collection (GCC): Pointer Arith |
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Next: Pointers to Arrays, Previous: Subscripting, Up: C Extensions [Contents][Index]
void- and Function-PointersIn 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.