How do I expand a tuple into variadic template function's arguments?

Question

Consider the case of a templated function with variadic template arguments:

template Tret func(const T&... t);
         


        

Answer 1

Why not just wrap your variadic arguments into a tuple class and then use compile time recursion (see link) to retrieve the index you are interested in. I find that unpacking variadic templates into a container or collection may not be type safe w.r.t. heterogeneous types

template
auto get_args_as_tuple(Args... args) -> std::tuple 
{
    return std::make_tuple(args);
}