Iterating over Boost fusion::vector

Question

I\'m trying to iterate over a boost::fusion vector using:

typedef typename fusion::result_of::begin::type t_iter;
  std::cout << distance(begi         


        

Answer 1

next doesn't actually advance the iterator, it just returns the next one.

This can be seen in the docs, as the function next takes a constant argument, meaning it can't possibly actually modify the iterator:

template<
    typename I
    >
typename result_of::next::type next(I const& i);
                                         ^^^^^