// In header: <boost/random/lagged_fibonacci.hpp>
template<typename UIntType, int w, unsigned int p, unsigned int q> 
class lagged_fibonacci_engine {
public:
  // types
  typedef UIntType result_type;
  // construct/copy/destruct
  lagged_fibonacci_engine();
  explicit lagged_fibonacci_engine(UIntType);
  template<typename SeedSeq> explicit lagged_fibonacci_engine(SeedSeq &);
  template<typename It> lagged_fibonacci_engine(It &, It);
  // public static functions
  static result_type min();
  static result_type max();
  // public member functions
  void seed();
  void seed(UIntType);
  template<typename SeedSeq> void seed(SeedSeq &);
  template<typename It> void seed(It &, It);
  result_type operator()();
  template<typename Iter> void generate(Iter, Iter);
  void discard(boost::uintmax_t);
  // friend functions
  template<typename CharT, typename Traits> 
    friend std::basic_ostream< CharT, Traits > & 
    operator<<(std::basic_ostream< CharT, Traits > &, 
               const lagged_fibonacci_engine &);
  template<typename CharT, typename Traits> 
    friend std::basic_istream< CharT, Traits > & 
    operator>>(std::basic_istream< CharT, Traits > &, 
               const lagged_fibonacci_engine &);
  friend bool operator==(const lagged_fibonacci_engine &, 
                         const lagged_fibonacci_engine &);
  friend bool operator!=(const lagged_fibonacci_engine &, 
                         const lagged_fibonacci_engine &);
  // public data members
  static const bool has_fixed_range;
  static const int word_size;
  static const unsigned int long_lag;
  static const unsigned int short_lag;
  static const UIntType default_seed;
};