// In header: <boost/test/data/monomorphic/join.hpp>
template<typename DataSet1, typename DataSet2> 
class join {
public:
  // types
  typedef dataset1_decay::sample sample;
  // member classes/structs/unions
  struct iterator {
    // construct/copy/destruct
    explicit iterator(dataset1_iter, dataset2_iter, data::size_t);
    // public member functions
    sample const & operator*() const;
    void operator++();
  };
  enum @8 { arity = = dataset1_decay::arity };
  // construct/copy/destruct
  join(DataSet1 &&, DataSet2 &&);
  join(join &&);
  // public member functions
  data::size_t size() const;
  iterator begin() const;
};