c++ - Reinterpret template type at compile time -

i create class, contains private attribut :

template<typename ta, typename t2, ... tn> // use <typename... tn> ? class {     public:     a(){};     ~a(){};      std::tuple<std::vector<std::reference_wrapper<t1>>, std::vector<std::reference_wrapper<t2>>, ...> t; }; 

but able write simple :

a<int, double, std::string> a; 

and automatically builds corresponding :

std::tuple<std::vector<std::reference_wrapper<int>>, std::vector<std::reference_wrapper<double>>, std::vector<std::reference_wrapper<std::string>>> t; 

(for number of arguments in tuple)

so want transform t std::reference_wrapper< t > , pass tuple. how can ? !

just expand pack:

template <typename ...args> struct foo {     std::tuple<std::vector<std::reference_wrapper<args>>...> t; };