Ajouter la fonction compare_query_tree pour verifer deux query_tree sont equivalents...

diff --git a/src/query_tree.ml b/src/query_tree.ml
index 5999df6..9297d3a 100644 (file)
--- a/src/query_tree.ml
+++ b/src/query_tree.ml
@@ -133,7 +133,27 @@ let debug tree q l =
 
 let table_query_tree = Hashtbl.create 97 
 
-  
+
+let rec compare_query_tree q1 q2 =
+     q1.id==q2.id|| match q1.desc,q2.desc with
+     | Binop(op1,qt1,qt2),Binop(op2,qt3,qt4)->op1==op2&& ((compare_query_tree qt1 qt3 && compare_query_tree qt2 qt4) 
+                                                         ||  (compare_query_tree qt1 qt4 && compare_query_tree qt2 qt3))
+     | Axis(a1,qt1),Axis(a2,qt2) -> compare_axis a1 a2 && compare_query_tree qt1 qt2
+     | Tag(t1,k1),Tag(t2,k2) ->t1==t2&& k1==k2
+     | Dom,Dom | Start,Start ->true
+     | _,_ ->false
+
+and compare_axis a1 a2 =
+  match a1,a2 with
+      Self ,Self | Attribute, Attribute | Child , Child | Parent , Parent
+    | FollowingSibling , FollowingSibling         
+    | PrecedingSibling , PrecedingSibling
+    | Preceding , Preceding | Following , Following -> true
+    | Descendant b1, Descendant b2 -> b1==b2 
+    | Ancestor b1, Ancestor b2 -> b1==b2
+    | _,_ -> false
+
+
 let rec eval_query_tree tree start q =
   let resultat = 
     begin