reascript function export

struct In {
    void* v;

    In(void* const& v) : v(v) {}

    operator double() { return *(double*)v; }
    operator double*() { return (double*)v; }

    operator int() { return (int)(INT_PTR)v; }
    operator int*() { return (int*)v; }

    operator bool() { return *(bool*)v; }
    operator bool*() { return (bool*)v; }

    operator char() { return *(char*)v; }
    operator char*() { return (char*)v; }
};

void* Out(int i) { return (void*)(INT_PTR)i; }

/*DEFINE EXPORT FUNCTIONS HERE*/
static void* AddTwoNumbers(void** args, int numparms) {
    int* n1 = In(args[0]);
    int n2 = In(args[1]);
    double mydouble = 3.14;
    int myint = 2;
    MediaItem* item = nullptr;

    return &mydouble; // are all my returns ok?
    return &myint;
    return (void*)3;
    return Out(*n1+n2);
    return (MediaItem*)item;
}