Binary value of (int TFoo::*)nullptr

test.cpp

#include <cstdint>
#include <cstring>
#include <iostream>


struct TFoo {
    int Bar;
    int Baz;
};


template <typename T, typename U>
inline T bit_cast(const U& value) {
    static_assert(sizeof(T) == sizeof(U));

    T result;
    memcpy(&result, &value, sizeof(value));
    return result;
}


int main() {
    std::cout
        << "Equality: "
        << (&TFoo::Bar == nullptr) << ' '
        << (&TFoo::Baz == nullptr) << std::endl;

    std::cout
        << "Representation: "
        << "ULONG_MAX = " << ULONG_MAX << ", "
        << "(int TFoo::*)nullptr = " << bit_cast<size_t>((int TFoo::*)nullptr) << ", "
        << "&TFoo::Bar = " << bit_cast<size_t>(&TFoo::Bar) << ", "
        << "&TFoo::Baz = " << bit_cast<size_t>(&TFoo::Baz) << std::endl;

    std::cout
        << "Sizes: "
        << sizeof(&TFoo::Bar) << ' '
        << sizeof(&TFoo::Baz) << std::endl;

    return 0;
}