c++ - Get the Nth type of variadic template templates?

Question

How to get the Nth type of variadic template templates? For example

template<typename... Args>
class MyClass
{
    Args[0] mA; // This is wrong. How to get the type?

};

Answer 1

You can use std::tuple:

#include<tuple>

template<typename... Args>
class MyClass
{
    typename std::tuple_element<0, std::tuple<Args...> >::type mA;
};