+ std::list<boost::shared_ptr<cxml::Node> > n = node.node_children (name);
+ if (n.size() > 1) {
+ throw XMLError ("duplicate XML tag");
+ } else if (n.empty ()) {
+ return boost::shared_ptr<T> ();
+ }
+
+ return boost::shared_ptr<T> (new T (n.front ()));
+}
+
+template <class T>
+boost::shared_ptr<T> type_child (boost::shared_ptr<const cxml::Node> node, std::string name) {
+ return boost::shared_ptr<T> (new T (node->node_child (name)));
+}
+
+template <class T>
+boost::shared_ptr<T>
+optional_type_child (boost::shared_ptr<const cxml::Node> node, std::string name)
+{
+ return optional_type_child<T> (*node.get(), name);
+}
+
+template <class T>
+std::list<boost::shared_ptr<T> >
+type_children (cxml::Node const & node, std::string name)
+{
+ std::list<boost::shared_ptr<cxml::Node> > n = node.node_children (name);
+ std::list<boost::shared_ptr<T> > r;
+ for (typename std::list<boost::shared_ptr<cxml::Node> >::iterator i = n.begin(); i != n.end(); ++i) {
+ r.push_back (boost::shared_ptr<T> (new T (*i)));
+ }
+ return r;
+}
+
+template <class T>
+std::list<boost::shared_ptr<T> >
+type_children (boost::shared_ptr<const cxml::Node> node, std::string name)
+{
+ return type_children<T> (*node.get(), name);
+}
+
+template <class T>
+std::list<boost::shared_ptr<T> >
+type_grand_children (cxml::Node const & node, std::string name, std::string sub)
+{
+ boost::shared_ptr<const cxml::Node> p = node.node_child (name);
+ return type_children<T> (p, sub);
+}
+
+template <class T>
+std::list<boost::shared_ptr<T> >
+type_grand_children (boost::shared_ptr<const cxml::Node> node, std::string name, std::string sub)
+{
+ return type_grand_children<T> (*node.get(), name, sub);
+}
+
+}
+
+#endif