Add `Self direction in Formula + compute fixed point in Run.

[tatoo.git] / src / formula.ml

diff --git a/src/formula.ml b/src/formula.ml
index 8369571..2d9893c 100644 (file)
--- 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
@@ -73,30 +73,30 @@ let prio f =
     | Or _ -> 1
       
 (* Begin Lucca Hirschi *)
-let rec eval_form ss f = match expr f with
+let rec eval_form (q,qf,qn) f = match expr f with
   | False -> false
   | True -> true
-  | And(f1,f2) -> eval_form ss f1 && eval_form ss f2
-  | Or(f1,f2) -> eval_form ss f1 || eval_form ss f2
+  | 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 -> fst ss | `Right -> snd ss in
+    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 ssq ssr f = match expr f with
+let rec infer_form sq sqf sqn f = match expr f with
   | False -> false
   | True -> true
-  | And(f1,f2) -> infer_form ssq ssr f1 && infer_form ssq ssr f2
-  | Or(f1,f2) -> infer_form ssq ssr f1 || infer_form ssq ssr f2
+  | 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 -> fst ssq, fst ssr
-      | `Right -> snd ssq, snd ssr in
+      | `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
@@ -117,6 +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;
@@ -147,6 +148,7 @@ let atom_ d p s =
   let ss = match d with
     | `Left -> si, StateSet.empty
     | `Right -> StateSet.empty, si
+    | `Self -> si, 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