Void ** a generic pointer?

Question

void * is a generic pointer, but what about void **? Is void ** also a generic pointer?

Can we typecast void ** t

Answer 1

void** is a pointer to void*. On top of it being undefined behavior (which while scary, the behavior is often in effect defined by your compiler), it is also a huge problem if you do the reinterpret_cast:

int x = 3;
char c = 2;
int* y = &x;
void* c_v = &c; // perfectly safe and well defined
void** z = reinterpret_cast(&y); // danger danger will robinson

*z = c_v; // note, no cast on this line
*y = 2; // undefined behavior, probably trashes the stack

Pointers to pointers are very different beasts than pointers. Type changes that are relatively safe on pointers are not safe on pointers to pointers.