Hi all, I'm enjoying learning the boost graph library. I'm trying to use the Dijkstra algorithm and try to store the shortest path as explained in the subsection "Extending Algorithms with Visitors" of the section "Quick Tour" of the BGL user guide. When I try to compile my code, I get the following error message: mesh.cpp:38: error: expected constructor, destructor, or type conversion before '<' token mesh.cpp:38: error: expected `;' before '<' token where line 38 is highlighted in the following portion of code. Could you help me to resolve this problem? Thanks in advance, Giulio template <class PredecessorMap> class record_predecessors : public dijkstra_visitor<> { public: record_predecessors(PredecessorMap p) : m_predecessor(p) { } template <class Edge, class Graph> void edge_relaxed(Edge e, Graph& g) { // set the parent of the target(e) to source(e) put(m_predecessor, target(e, g), source(e, g)); } protected: PredecessorMap m_predecessor; }; template <class PredecessorMap> line 38: record_predecessors<PredecessorMap> make_predecessor_recorder(PredecessorMap p) { return record_predecessors<PredecessorMap>(p); } ___________________________________ Yahoo! Mail: gratis 1GB per i messaggi e allegati da 10MB http://mail.yahoo.it