On Mon, 30 Nov 2009, Amanullah Yasin wrote:

Hi,  Dear all

I want to add one additional edge property in Boost graph object of type "bool". Please guide me how i can do it. I tried but not successful. 

////////////////////// Here is the main definition of Boost graph object "slGraph"  ///////////////////////////////////////////////////////////////////////// namespace boost {   struct computable_object_t   {     typedef vertex_property_tag kind;   }; }

typedef boost::property<boost::vertex_index_t, unsigned int,                         boost::property<boost::computable_object_t,                                         plComputableObject*> > slVertexProperty;

typedef boost::property<boost::edge_weight_t, slScoreValueType> slEdgeProperty;

typedef boost::adjacency_list<boost::vecS, boost::listS, boost::bidirectionalS, \                              slVertexProperty, slEdgeProperty> slGraph;

typedef slGraph::vertex_descriptor slNode; typedef slGraph::edge_descriptor slEdge; typedef slGraph::vertex_iterator slNodeIterator; typedef slGraph::edge_iterator slEdgeIterator; typedef slGraph::out_edge_iterator slOutEdgeIterator; typedef slGraph::in_edge_iterator slInEdgeIterator; typedef slGraph::adjacency_iterator slOutNodeIterator; typedef slGraph::inv_adjacency_iterator slInNodeIterator;

You don't need to put your property tag in the boost namespace. Is there anything you tried to do to add the new property and failed? You can just add a new element to the chain of boost::property elements for your edge properties (slEdgeProperty), given your property tag (see the definition of computable_object_t for how to create a tag, but use edge_property_tag for yours). You can also use bundled properties (http://www.boost.org/doc/libs/1_41_0/libs/graph/doc/bundles.html) which will greately simplify adding properties. -- Jeremiah Willcock