external tag_name : pool -> t -> string = "caml_xml_tree_tag_name"
let nullt = null_tag ()
-let pcdata = max_int
-let attribute = max_int - 1
+(* Defined in XMLTree.cpp *)
+let document_node = 0
+let attribute = 1
+let pcdata = 2
+let attribute_data= 3
+let document_node_close = 4
+let attribute_close = 5
+let pcdata_close = 6
+let attribute_data_close= 7
-let pool = ref (null_pool ())
-let init p = pool := p
+let pool = Weak.create 1
+
+let init p = Weak.set pool 0 (Some p)
+
+let get_pool () = match Weak.get pool 0 with
+ | Some x -> x
+ | None -> failwith "Tag.ml: Uninitialized Document"
let tag s = match s with
| "<$>" -> pcdata
| "<@>" -> attribute
- | _ -> register_tag !pool s
+ | "" -> document_node
+ | "<@$>" -> attribute_data
+ | _ -> register_tag (get_pool()) s
let compare = (-)
let equal = (==)
+
+let hash x = x
+
+
let to_string t =
- if t = pcdata then "<$>"
- else if t = attribute then "<@>"
- else tag_name !pool t
+ if t == pcdata then "<$>"
+ else if t == attribute_data then "<@$>"
+ else if t == attribute then "<@>"
+ else if t == nullt then "<!NIL!>"
+ else tag_name (get_pool()) t
let print ppf t = Format.fprintf ppf "%s" (to_string t)
+(* Check internal invariants *)
+let check t =
+ if (t != tag (to_string t))
+ then failwith "module Tag: internal check failed"
+
+let dump = print
+