// In header: <boost/heap/skew_heap.hpp>



struct implementation_defined {
  // types
  typedef T                               value_type;         
  typedef base_maker::compare_argument    value_compare;      
  typedef base_maker::allocator_type      allocator_type;     
  typedef base_maker::node_type           node;               
  typedef allocator_type::pointer         node_pointer;       
  typedef allocator_type::const_pointer   const_node_pointer; 
  typedef unspecified                     value_extractor;    
  typedef boost::array< node_pointer, 2 > child_list_type;    
  typedef child_list_type::iterator       child_list_iterator;
  typedef unspecified                     iterator;           
  typedef iterator                        const_iterator;     
  typedef unspecified                     ordered_iterator;   
  typedef unspecified                     reference;          
  typedef unspecified                     handle_type;        
};