dynamic_cast from “void *”

Question

According to this, void* has no RTTI information, therefore casting from void* is not legal and it make sense.

If I remember correctly,

Answer 1

It is true that void* can't be dynamically_casted from.

You are probably mis-remembering. With g++ 4.5 and the following code

struct A {
    virtual ~A();
};

int main() {
    A a;
    void *p = &a;
    A* pa = dynamic_cast(p);
}

I get the following error:

cannot dynamic_cast 'p' (of type 'void*') to type 'struct A*' (source is not a pointer to class)