[Boost-users] in-depth iterator

Hello everyone, I have a question concerning the boost::iterator library. Here is my situation : I have a Tree structure that looks like that : template<class T> struct Node : public std::vector { T value; }; I'd like to create an iterator that would yield all the values of such a structure. And also being able to prevent the iterator from going into some branches. The interface should look like this : template<class T> struct Policy { bool go_inside(const Node& node) { return True; }; }; Node<int> my_tree; ... depth_iter iter(my_tree, Policy()); for (; depth_iter++; depth_iter != my_tree.end()) { .... } I can't find an easy way to create this "depht_iter" class. Doesn't the boost::iterator library gives some way to create in-depth iterators ? Is there a way to use the boost::graph library ? Thanks in advance Guillaume