How do you write out-of-line constructor with template parameters?

Question

Lets say I have the following struct. How would I write the out-of-line constructor for this?

template <typename T>
struct foo
{
    template <typename Bar>
    foo(int n, Bar bar);
};

Answer 1

You would need two separate template declarations:

template <typename T>
template <typename Bar>
foo<T>::foo(int n, Bar bar)
{
    // ...
}