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#include <iostream>
#include <utility>
 
using namespace std;
template<typename... list> struct typeList;
 
 
template<typename, typename> struct zipper;
template<typename...L, typename...R> struct zipper<typeList<L...>, typeList<R...>> : std::tuple<std::pair<L,R>...>
{
    typedef std::tuple<std::pair<L,R>...> tuplez;
    static_assert(sizeof...(L)==sizeof...(R), "Mismatch number of Args...");
 
    static void print()
    {
    std::cout<<"The types are: "<<std::endl;
    for(int i=0; i<std::tuple_size<tuplez>::value ; ++i)
    std::cout<< "first : "<< typeid(std::tuple_element<i, tuplez>::type::first_type).name()<<
        "second : "<<typeid(std::tuple_element<i, tuplez>::type::second_type).name() <<std::endl;
    }
};
 
int main()
{
    zipper<typeList<int,double>, typeList<char,int>>::print();
    return 0;
}
 

prog.cpp:9:96: error: expected template-name before '<' token
prog.cpp:9:96: error: expected '{' before '<' token
prog.cpp:9:96: error: expected unqualified-id before '<' token
prog.cpp: In function 'int main()':
prog.cpp:25:5: error: incomplete type 'zipper<typeList<int, double>, typeList<char, int> >' used in nested name specifier

Standard output is empty