immortal_object.cpp

/**
 * Creates an object that is never cleaned up by using placement new into a local memory buffer
 * Useful for singletons
 */
template<class T>
struct Immortal {
    template<class... Args>
    Immortal(Args&&... args) {
        ::new(space) T(std::forward<Args>(args)...);
    }

    operator T&() & noexcept { return reinterpret_cast<T&>(space); }
private:
    alignas(T) unsigned char space[sizeof(T)];
};