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6.23 Arithmetic on
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
and on function types, and returns 1.
The option ‘-Wpointer-arith’ requests a warning if these extensions are used.
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