21         struct xml_element;
22         typedef tree<xml_element> xml_tree;
23         typedef tree_builder<xml_element> xml_tree_builder;
26         struct xml_element : tree_node<xml_element>  struct
42             explicit xml_element(element_type n) : type_(n) {}  in xml_element()  function
44             explicit xml_element(element_type n, quickbook::string_view name)  in xml_element()  function
49             static xml_element* text_node(quickbook::string_view x)  in text_node()  argument
51                 xml_element* n = new xml_element(element_text);  in text_node()
56             static xml_element* html_node(quickbook::string_view x)  in html_node()  argument
58                 xml_element* n = new xml_element(element_html);  in html_node()
63             static xml_element* node(quickbook::string_view x)  in node()  argument
65                 return new xml_element(element_node, x);  in node()
106             xml_element* get_child(quickbook::string_view name)  in get_child()  argument
129         void write_xml_tree(xml_element*);