Compiling below, It's OK.
but executing, visitors do nothing.
What's the problem?
Is this slicing problem?
why?
thank you in advance.
---------------------- below ------------------------
// bfs visitor 1. just printing every vertex in breath first order.
struct graph_printer1 : public default_bfs_visitor
{
template
void discover_vertex(Vertex u, Graph& g)
{
cout << " graph printer 1" << u <<"\n";
}
};
// bfs visitor 2. same as visitor 1 except message.
struct graph_printer2 : public default_bfs_visitor
{
template
void discover_vertex(Vertex u, Graph& g)
{
cout << " graph printer 2" << u <<"\n";
}
};
// graph wrapper
class graph_wrapper
{
protected:
adjacency_list
m_graph;
public:
// HERE. this Visit function does nothing.!!
void Visit(default_bfs_visitor* vis, int vertexID )
{
breadth_first_search(m_graph, vertex(vertexID, m_graph),
visitor(*vis));
}
};
int main()
{
graph_wrapper holder;
graph_printer1 vis1;
graph_printer2 vis2;
holder.Visit(&vis1);
holder.Visit(&vis2);
return 0;
}
----------------------------------------
Ki-Soo, Park
e-mail: park@erhouse.co.kr
wfms123@hotmail.com
