X-Git-Url: http://git.nguyen.vg/gitweb/?p=tatoo.git;a=blobdiff_plain;f=src%2Fxpath%2Fcompile.ml;h=cd887b74970d5a07094fb927b58efcb34717ccf0;hp=c53057e6c5e2d69fabf102c43e4758c8c19baaed;hb=6ca42ffbd541cede6afcc473b563e54b848ee534;hpb=af9d790ca62e678e8e70ab8d8fa7f804985a75e0

diff --git a/src/xpath/compile.ml b/src/xpath/compile.ml
index c53057e..cd887b7 100644
--- a/src/xpath/compile.ml
+++ b/src/xpath/compile.ml
@@ -39,7 +39,7 @@ let root_set = QNameSet.singleton QName.document
    holds.
 *)
 
-let compile_axis_test axis (test,kind) phi trans states =
+let compile_axis_test axis (test,kind) phi trans states=
   let q = State.make () in
   let phi = match kind with
     Tree.NodeKind.Node -> phi
@@ -210,26 +210,40 @@ let compile_top_level_step_list l trans states =
             in
             loop ll trans2 states2  phi2
   in
+  let starting = State.make () in
   let phi0, trans0, states0 =
     compile_axis_test
       Self
-      (QNameSet.singleton QName.document, Tree.NodeKind.Node)
-      F.true_
+      (QNameSet.any, Tree.NodeKind.Node)
+      (F.stay starting)
       trans
       states
   in
-  loop l trans0 states0 phi0
+  let mstates, trans, states = loop l trans0 states0 phi0 in
+  starting, mstates, trans, states
 ;;
 
 let path p =
-  let mstates, trans, states = List.fold_left (fun (ams, atrs, asts) p ->
-    let ms, natrs, nasts =
-      match p with
-      | Absolute l | Relative l -> compile_top_level_step_list l atrs asts
-    in
-    (StateSet.add ms ams), natrs, nasts) (StateSet.empty, [], StateSet.empty) p
+  let sstates, mstates, trans, states =
+    List.fold_left (fun (ass, ams, atrs, asts) p ->
+      let ss, ms, natrs, nasts =
+        match p with
+        | Absolute l | Relative l -> compile_top_level_step_list l atrs asts
+      in
+      (StateSet.add ss ass),
+      (StateSet.add ms ams),
+      natrs,
+      nasts) (StateSet.empty, StateSet.empty, [], StateSet.empty) p
   in
   let builder = Ata.Builder.make () in
+  (** ensure that we have a single selecting state at the end *)
+  let phi_sel = StateSet.fold (fun q acc -> F.or_ (F.stay q) acc) mstates F.false_ in
+  let q_sel = State.make () in
+  let states = StateSet.add q_sel states in
+  let mstates = StateSet.singleton q_sel in
+  let trans = (q_sel, [QNameSet.any, phi_sel]) :: trans in
+  StateSet.iter
+    (Ata.Builder.add_state builder ~starting:true) sstates;
   StateSet.iter
     (Ata.Builder.add_state builder ~selecting:true) mstates;
   StateSet.iter