Variadic Templates pack expansions

Question

In Andrei\'s talk on GoingNative 2012 he talks about Variadic Templates, and he explains at one point by way of the example underneath how the parameter pack expansions work. B

Answer 1

KennyTM's answer is perfect. I just also like samples. But since his answer is abstract, I didn't feel like adding demos to his answer is the correct thing. So demos for his answer are here. I'm assuming his answer is right, I know nothing myself. (If you upvote this, upvote his too)

Obviously this is all psudocode just showing the expanded states.

void foo(nullptr, 32, '7', "BANANA") {
    //gun(A::hun(vs)...);
    gun(A::hun(nullptr)
       ,A::hun(32)
       ,A::hun('7')
       ,A::hun("BANANA")
       );
    //gun(A::hun(vs...));
    gun(A::hun(nullptr, 32, '7', "BANANA");
    //gun(A::hun(vs)...);
    gun(A::hun(nullptr)
       ,A::hun(32),
       ,A::hun('7'),
       ,A::hun("BANANA")
       );
}