the original code is like that: /* template <class Visitors = null_visitor> class bfs_visitor { ... }; typedef bfs_visitor<> default_bfs_visitor; */ I have no experience with that but I would try to do use a template instantiation of bfs_visitor instead of the default_bfs_visitor as base class. I hope it helps. Cheers, Stephan that's code from a former message of you

class bfs_my_visitor:public default_bfs_visitor { ... public: bfs_stop_visitor(...) {} template < typename Vertex, typename Graph > void finish_vertex(Vertex u, const Graph & g) const { ... } };

Jérémie Leguay schrieb:

Hi everybody!

I really need to perform the single-pair problem. I have begin to implement it as it is written in some mail of the mailing list. I do a breadth first search and I want to use both a visitor recor_distances and a visito of my own which throws an exception to stop the algorithm when the destination is found. My problem is that I did'nt found the way to mix theses two visitors. Can you help me?

regards,

Jérémie

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