// In header: <boost/date_time/local_time_adjustor.hpp>
template<typename time_type, typename dst_rules> 
class dynamic_local_time_adjustor : public dst_rules {
public:
  // types
  typedef time_type::time_duration_type time_duration_type;
  typedef time_type::date_type          date_type;         
  // construct/copy/destruct
  dynamic_local_time_adjustor(time_duration_type);
  // public member functions
  time_duration_type utc_offset(bool);
};