#include <iostream>
#include <memory>

template <typename T> class Address
{
    private:
        T* ptr;
        size_t size;
    public:
        Address(T item) : ptr(&item), size(sizeof(item)) {}
        T getItem() const 
        {
            return *ptr;
        }
        long getAddress() const
        {
            return (long int ) ptr;
        }
        long getSize() const
        {
            return size;
        }        
};

template <typename T> 
std::ostream& operator<<(std::ostream& out, const Address<T> item)
{
    out << "nItem: " << item.getItem() << "n";
    out << "Address : " << item.getAddress() << "n";
    out << "Size : " << item.getSize() << "n";
    return out;
}

int main()
{
    std::unique_ptr<Address<char>> ptr_addressObj(new Address('P'));
    std::cout<< *ptr_addressObj << "n";
}

Produces

Item:
Address : 140720983114340
Size : 1

HOw to get the Item back? Right now it is blank. Same with Address