Added unit_test file

[SXSI/xpathcomp.git] / ptset.ml

diff --git a/ptset.ml b/ptset.ml
index 091d4a8..3d30f68 100644 (file)
--- a/ptset.ml
+++ b/ptset.ml
@@ -58,7 +58,7 @@ let empty = { id = gen_uid ();
 
 let _ = WH.add pool empty
 
-let is_empty = function { id = 0 } -> true  | _ -> false
+let is_empty s = s.id==0
     
 let rec norm n =
   let v = { id = gen_uid ();
@@ -82,7 +82,7 @@ let branch_ne = function
 
 let zero_bit k m = (k land m) == 0
 
-let singleton k = if k < 0 then failwith "singleton" else leaf k
+let singleton k = leaf k
 
 let rec mem k n = match n.node with
   | Empty -> false