#ifndef MARCI_GRAPH_TRAITS_HH

 #define MARCI_GRAPH_TRAITS_HH

 namespace marci {

   template <typename graph_type>

   struct graph_traits {

     typedef typename graph_type::node_iterator node_iterator;

     typedef typename graph_type::edge_iterator edge_iterator;

     typedef typename graph_type::each_node_iterator each_node_iterator;

     typedef typename graph_type::each_edge_iterator each_edge_iterator;

     typedef typename graph_type::out_edge_iterator out_edge_iterator;

     typedef typename graph_type::in_edge_iterator in_edge_iterator;

     typedef typename graph_type::sym_edge_iterator sym_edge_iterator;

   };

 } // namespace marci

 #endif //MARCI_GRAPH_TRAITS_HH