code example:

#include <iostream>
#include <cstdint>

class {
    char ch;
    double d;
    int8_t val;
    float f;
    virtual auto get() -> int8_t* { return &val; }
} obj;

auto main(int argc, const char* argv[]) -> decltype(argc) {
    int8_t*(*get)(){ ((int8_t*(*)())((*((int64_t**)&obj)[0]))) };
    int8_t* val{ (int8_t*)((int64_t)&obj+(int64_t)get()) };
    *val = '\u0030';
    std::cout << *val;

    return EXIT_SUCCESS;
}