if Tree.tag tree t == tag then t
else Tree.tagged_descendant tree t tag
- let fst_element tree t =
+(*
+ let fst_element tree t =
let tag = Tree.tag tree t in
- let t = if Ptset.Int.mem tag
- (Ptset.Int.remove Tag.document_node (Tree.element_tags tree))
- then t
- else Tree.first_element tree t
- in Tree.first_element tree t
+ if tag == Tag.document_node then
+ Tree.first_element tree t
+ else t
+*)
let element_fold f tree t acc =
let rec loop node acc =
let acc' = loop (Tree.first_element tree node) acc in
loop (Tree.next_element tree node) acc'
in
- loop (fst_element tree t) acc
+ let t' = Tree.first_element tree t in loop t' acc
let element_iter f tree t =
- let rec loop node =
- if node != Tree.nil then begin
- f node;
- loop (Tree.first_element tree node);
- loop (Tree.next_element tree node)
- end
- in
- let t' = fst_element tree t in loop t'
+ let newf = fun e () -> f e in
+ element_fold newf tree t ()
let tag_fold f tree t tag acc =
let rec loop close node acc =