X-Git-Url: http://git.nguyen.vg/gitweb/?a=blobdiff_plain;f=src%2Fformula.ml;h=c3c836b2d6c83ef782f992c7b843f173bf738fab;hb=64d7d77a886a9fb00d62156b6dd1a43487b30772;hp=f7eae8516083c264f88bad92af477ede121173ba;hpb=cba2938d929fd5119b1491686ddc224d5af618c6;p=tatoo.git

diff --git a/src/formula.ml b/src/formula.ml
index f7eae85..c3c836b 100644
--- a/src/formula.ml
+++ b/src/formula.ml
@@ -15,7 +15,7 @@
 INCLUDE "utils.ml"
 
 open Format
-type move = [ `Left | `Right ]
+type move = [ `Left | `Right | `Self ]
 type 'hcons expr =
   | False | True
   | Or of 'hcons * 'hcons
@@ -71,7 +71,32 @@ let prio f =
     | Atom _ -> 8
     | And _ -> 6
     | Or _ -> 1
-
+      
+(* Begin Lucca Hirschi *)
+let rec eval_form (q,qf,qn) f = match expr f with
+  | False -> false
+  | True -> true
+  | And(f1,f2) -> eval_form (q,qf,qn) f1 && eval_form (q,qf,qn) f2
+  | Or(f1,f2) -> eval_form (q,qf,qn) f1 || eval_form (q,qf,qn) f2
+  | Atom(dir, b, s) -> 
+    let set = match dir with
+      |`Left -> qf | `Right -> qn | `Self -> q in
+    if b then StateSet.mem s set
+    else not (StateSet.mem s set)
+
+let rec infer_form sq sqf sqn f = match expr f with
+  | False -> false
+  | True -> true
+  | And(f1,f2) -> infer_form sq sqf sqn f1 && infer_form sq sqf sqn f2
+  | Or(f1,f2) -> infer_form sq sqf sqn f1 || infer_form sq sqf sqn f2
+  | Atom(dir, b, s) -> 
+    let setq, setr = match dir with
+      | `Left -> sqf | `Right -> sqn | `Self -> sq in
+    (* WG: WE SUPPOSE THAT Q^r and Q^q are disjoint ! *)
+    let mem =  StateSet.mem s setq || StateSet.mem s setr in
+    if b then mem else not mem
+(* End *)
+      
 let rec print ?(parent=false) ppf f =
   if parent then fprintf ppf "(";
   let _ = match expr f with
@@ -92,6 +117,7 @@ let rec print ?(parent=false) ppf f =
           match  dir with
           | `Left ->  Pretty.down_arrow, Pretty.subscript 1
           | `Right -> Pretty.down_arrow, Pretty.subscript 2
+          | `Self -> Pretty.down_arrow, Pretty.subscript 0
         in
         fprintf fmt "%s%s" a_str d_str;
         State.print fmt s;
@@ -122,6 +148,7 @@ let atom_ d p s =
   let ss = match d with
     | `Left -> si, StateSet.empty
     | `Right -> StateSet.empty, si
+    | `Self -> StateSet.empty, StateSet.empty       (* TODO WHAT? *)
   in fst (cons (Atom(d,p,s)) (Atom(d,not p,s)) ss ss 1 1)
 
 let not_ f = f.Node.node.neg