s::graph::_&gt;, key_type&lt;_&gt;
              &gt;
          &gt;)</strong>
        , get(boost::vertex_index,graph))

      (in_out(color_map)
        , <strong>*(boost::is_same&lt;
              vertex_descriptor&lt;graphs::graph::_&gt;, key_type&lt;_&gt;
          &gt;)</strong>
       , default_color_map(num_vertices(graph), index_map) )
    )
)
</pre>
<!-- @example.prepend('''
#include <boost/parameter.hpp>
#include <boost/graph/adjacency_list.hpp>
#include <boost/graph/depth_first_search.hpp>

BOOS