// In header: <boost/intrusive/treap_set.hpp>
template<typename T, class... Options> 
struct make_treap_set {
  // types
  typedef pack_options< treap_defaults, O1, O2, O3, O4, O5, O6 >::type                                                                                                                                                                                               packed_options;        
  typedef unspecified                                                                                                                                                                                                                                                value_traits;          
  typedef treap_set< value_traits, typename packed_options::key_of_value, typename packed_options::compare, typename packed_options::priority, typename packed_options::size_type, packed_options::constant_time_size, typename packed_options::header_holder_type > implementation_defined;
  typedef implementation_defined                                                                                                                                                                                                                                     type;                  
};