added patch to allow i,j,k: skip and *: skip

[helm.git] / components / tactics / continuationals.ml

diff --git a/components/tactics/continuationals.ml b/components/tactics/continuationals.ml
index 3ed167a71c3f7ab471d95c6c13027fac3f519ce1..044fa45c841cb61e39ecfbe335a14e20937160ec 100644 (file)
--- a/components/tactics/continuationals.ml
+++ b/components/tactics/continuationals.ml
@@ -72,7 +72,8 @@ struct
   let is_open = function _, Open _ -> true | _ -> false
   let close = function n, Open g -> n, Closed g | l -> l
   let filter_open = List.filter is_open
-  let is_fresh = function n, Open _ when n > 0 -> true | _ -> false
+  let is_fresh = 
+    function n, Open _ when n > 0 -> true | _,Closed _ -> true | _ -> false
   let goal_of_loc = function _, Open g | _, Closed g -> g
   let goal_of_switch = function Open g | Closed g -> g
   let switch_of_loc = snd
@@ -175,13 +176,10 @@ sig
   type output_status
 
   type tactic
-
-  val id_tactic : tactic
   val mk_tactic : (input_status -> output_status) -> tactic
   val apply_tactic : tactic -> input_status -> output_status
 
   val goals : output_status -> goal list * goal list (** opened, closed goals *)
-  val set_goals: goal list * goal list -> output_status -> output_status
   val get_stack : input_status -> Stack.t
   val set_stack : Stack.t -> output_status -> output_status
 
@@ -205,7 +203,8 @@ sig
 
     | Branch
     | Shift
-    | Pos of int
+    | Pos of int list
+    | Wildcard
     | Merge
 
     | Focus of goal list
@@ -233,7 +232,8 @@ struct
     | Semicolon
     | Branch
     | Shift
-    | Pos of int
+    | Pos of int list
+    | Wildcard
     | Merge
     | Focus of goal list
     | Unfocus
@@ -245,7 +245,8 @@ struct
     | Semicolon -> "Semicolon"
     | Branch -> "Branch"
     | Shift -> "Shift"
-    | Pos i -> "Pos " ^ string_of_int i
+    | Pos i -> "Pos " ^ (String.concat "," (List.map string_of_int i))
+    | Wildcard -> "Wildcard"
     | Merge -> "Merge"
     | Focus gs ->
         sprintf "Focus [%s]" (String.concat "; " (List.map string_of_int gs))
@@ -270,7 +271,13 @@ struct
       match cmd, stack with
       | _, [] -> assert false
       | Tactical tac, (g, t, k, tag) :: s ->
-          if g = [] then fail (lazy "can't apply a tactic to zero goals");
+(* COMMENTED OUT TO ALLOW PARAMODULATION TO DO A 
+ *   auto paramodulation.try assumption.
+ * EVEN IF NO GOALS ARE LEFT OPEN BY AUTO.
+  
+  if g = [] then fail (lazy "can't apply a tactic to zero goals");
+  
+*)
           debug_print (lazy ("context length " ^string_of_int (List.length g)));
           let rec aux s go gc =
             function
@@ -293,7 +300,7 @@ struct
           debug_print (lazy ("closed: "
             ^ String.concat " " (List.map string_of_int gcn)));
           let stack =
-            (zero_pos gon, t @~- gcn, k @~- gon, tag) :: deep_close gcn s
+            (zero_pos gon, t @~- gcn, k @~- gcn, tag) :: deep_close gcn s
           in
           sn, stack
       | Dot, ([], _, [], _) :: _ ->
@@ -318,21 +325,22 @@ struct
           | [] -> fail (lazy "no more goals to shift")
           | loc :: loc_tl ->
               new_stack
-                (([ loc ], t @+ filter_open g, [],`BranchTag)
+                (([ loc ], t @+ filter_open g @+ k, [],`BranchTag)
                 :: (loc_tl, t', k', tag) :: s))
       | Shift, _ -> fail (lazy "can't shift goals here")
-      | Pos i, ([ loc ], [], [],`BranchTag) :: (g', t', k', tag) :: s
+      | Pos i_s, ([ loc ], t, [],`BranchTag) :: (g', t', k', tag) :: s
         when is_fresh loc ->
-          let loc_i, g' = extract_pos i g' in
-          new_stack
-            (([ loc_i ], [], [],`BranchTag)
-             :: ([ loc ] @+ g', t', k', tag) :: s)
-      | Pos i, (g, t, k,`BranchTag) :: (g', t', k', tag) :: s ->
-          let loc_i, g' = extract_pos i g' in
+          let l_js = List.filter (fun (i, _) -> List.mem i i_s) ([loc] @+ g') in
           new_stack
-            (([ loc_i ], [], [],`BranchTag)
-             :: (g', t' @+ filter_open g, k', tag) :: s)
+            ((l_js, t , [],`BranchTag)
+             :: (([ loc ] @+ g') @- l_js, t', k', tag) :: s)
       | Pos _, _ -> fail (lazy "can't use relative positioning here")
+      | Wildcard, ([ loc ] , t, [], `BranchTag) :: (g', t', k', tag) :: s
+          when is_fresh loc ->
+            new_stack
+              (([loc] @+ g', t, [], `BranchTag)
+                :: ([], t', k', tag) :: s)
+      | Wildcard, _ -> fail (lazy "can't use wildcard here")
       | Merge, (g, t, k,`BranchTag) :: (g', t', k', tag) :: s ->
           new_stack ((t @+ filter_open g @+ g' @+ k, t', k', tag) :: s)
       | Merge, _ -> fail (lazy "can't merge goals here")