some tricks with variadic templates

t.cpp

// g++ -Wall -std=c++14
#include <iostream>

template <typename... Ts>
size_t get_sum(const Ts&... args)
{
    size_t s = 0;
    for (const auto& a : {args...})
        s += a;

    return s;
}

template <typename... Ts>
void print_all(const Ts&... args)
{
    for (const auto& a : {args...})
        std::cout << a << " ";
    std::cout << std::endl;
}

int main()
{
    std::cout << get_sum(1, 2, 3) << std::endl;
    print_all("foo", 1, "bar", "baz"); // an error will be here
    return 0;
}

t2.cpp

#include <iostream>

template <class H> void print(H h)
{
    std::cout << h << std::endl;
}

template <class H, class... T> void print(H h, T... t)
{
    std::cout << h << " ";
    print(t...);
}

int main()
{
    print("foo", "bar", 42, "baz");
    return 0;
}