Modifying vertex properties in a Boost::Graph

Question

I am trying to figure out how to use boost::graph to store some information. However, there is information I want tied to each vertex. Staring at the documentation for the l

Answer 1

I consider Boost.Graph to have a very good documentation, but not truly for beginners on the matter. So here goes an example that i hope is simple enough !

//includes

// Create a name for your information
struct VertexInformation
{
  typedef boost::vertex_property_type type;
};

// Graph type, customize it to your needs
// This is when you decide what information will be attached to vertices and/or edges
// of MyGraph objects
typedef boost::adjacency_list > MyGraph;

int main()
{
  MyGraph graph;

  // Create accessor for information
  typedef boost::property_map::type  InformationAccessor;
  InformationAccessor information( get( VertexInformation(), graph ) );

  // Create a vertex (for example purpose)
  typedef boost::graph_traits::vertex_descriptor MyVertex;
  MyVertex vertex = add_vertex( graph );

  // Now you can access your information
  put( information, vertex, 1. );

  // returns 1 !
  get( information, vertex );
  return 0;
}