De/serialization in C++ (not suitable when typeid not consistent)

main.cpp

#include <iostream>
#include <sstream>
#include <map>

template<typename T>
void ReadAndConsume(std::istringstream& s)
{
    T t;
    s >> t;
    std::cout << t << ' ';
}

template<typename...Ts>
struct DispatchTable
{
    inline static std::map<size_t, void(*)(std::istringstream&)>
        Entries{{typeid(Ts).hash_code(), &ReadAndConsume<Ts>}...};
};

int main()
{
    typedef DispatchTable<float, int> Table;
    std::ostringstream t;
    t << typeid(int).hash_code() << ' ' << 17 << ' ';
    t << typeid(float).hash_code() << ' ' << 3.14 << ' ';

    std::istringstream u(t.str());
    for (int i = 0; i < 2; ++i)
    {
        size_t id;
        u >> id;
        Table::Entries[id](u);
    }
}