X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fng_tactics%2FnTactics.ml;h=a384d54d56259f89952a7a14f8d013022cee568a;hb=d268de514258947484a22a106c220b102c611cc3;hp=0be24856e7c4222ec0667b1c2ed8c1bd0493ac55;hpb=d6484aac4ff287a3a3646807801eab4b27cfb054;p=helm.git

diff --git a/helm/software/components/ng_tactics/nTactics.ml b/helm/software/components/ng_tactics/nTactics.ml
index 0be24856e..a384d54d5 100644
--- a/helm/software/components/ng_tactics/nTactics.ml
+++ b/helm/software/components/ng_tactics/nTactics.ml
@@ -13,7 +13,7 @@
 
 open Printf
 
-let debug = true
+let debug = false
 let debug_print s = if debug then prerr_endline (Lazy.force s) else ()
 
 open Continuationals.Stack
@@ -22,14 +22,14 @@ module Ast = CicNotationPt
 
 let id_tac status = status ;;
 let print_tac print_status message status = 
-  if print_status then pp_tac_status status;
+  if print_status then pp_status status;
   prerr_endline message; 
   status
 ;;
 
 let dot_tac status =
-  let new_gstatus = 
-    match status.gstatus with
+  let gstatus = 
+    match status#stack with
     | [] -> assert false
     | ([], _, [], _) :: _ as stack ->
         (* backward compatibility: do-nothing-dot *)
@@ -43,12 +43,12 @@ let dot_tac status =
             (([ loc ], t, k, tag) :: s)
         | _ -> fail (lazy "can't use \".\" here")
   in
-   { status with gstatus = new_gstatus }
+   status#set_stack gstatus
 ;;
 
 let branch_tac status =
-  let new_gstatus = 
-    match status.gstatus with
+  let gstatus = 
+    match status#stack with
     | [] -> assert false
     | (g, t, k, tag) :: s ->
           match init_pos g with (* TODO *)
@@ -56,12 +56,12 @@ let branch_tac status =
           | loc :: loc_tl ->
                ([ loc ], [], [], `BranchTag) :: (loc_tl, t, k, tag) :: s
   in
-   { status with gstatus = new_gstatus }
+   status#set_stack gstatus
 ;;
 
 let shift_tac status =
-  let new_gstatus = 
-    match status.gstatus with
+  let gstatus = 
+    match status#stack with
     | (g, t, k, `BranchTag) :: (g', t', k', tag) :: s ->
           (match g' with
           | [] -> fail (lazy "no more goals to shift")
@@ -70,12 +70,12 @@ let shift_tac status =
                 :: (loc_tl, t', k', tag) :: s))
      | _ -> fail (lazy "can't shift goals here")
   in
-   { status with gstatus = new_gstatus }
+   status#set_stack gstatus
 ;;
 
 let pos_tac i_s status =
-  let new_gstatus = 
-    match status.gstatus with
+  let gstatus = 
+    match status#stack with
     | [] -> assert false
     | ([ loc ], t, [],`BranchTag) :: (g', t', k', tag) :: s
       when is_fresh loc ->
@@ -84,35 +84,35 @@ let pos_tac i_s status =
            :: (([ loc ] @+ g') @- l_js, t', k', tag) :: s)
     | _ -> fail (lazy "can't use relative positioning here")
   in
-   { status with gstatus = new_gstatus }
+   status#set_stack gstatus
 ;;
 
 let wildcard_tac status =
-  let new_gstatus = 
-    match status.gstatus with
+  let gstatus = 
+    match status#stack with
     | [] -> assert false
     | ([ loc ] , t, [], `BranchTag) :: (g', t', k', tag) :: s
        when is_fresh loc ->
             (([loc] @+ g', t, [], `BranchTag) :: ([], t', k', tag) :: s)
     | _ -> fail (lazy "can't use wildcard here")
   in
-   { status with gstatus = new_gstatus }
+   status#set_stack gstatus
 ;;
 
 let merge_tac status =
-  let new_gstatus = 
-    match status.gstatus with
+  let gstatus = 
+    match status#stack with
     | [] -> assert false
     | (g, t, k,`BranchTag) :: (g', t', k', tag) :: s ->
         ((t @+ filter_open g @+ g' @+ k, t', k', tag) :: s)
     | _ -> fail (lazy "can't merge goals here")
   in
-   { status with gstatus = new_gstatus }
+   status#set_stack gstatus
 ;;
       
 let focus_tac gs status =
-  let new_gstatus = 
-    match status.gstatus with
+  let gstatus = 
+    match status#stack with
     | [] -> assert false
     | s -> assert(gs <> []);
           let stack_locs =
@@ -126,22 +126,22 @@ let focus_tac gs status =
             gs;
           (zero_pos gs, [], [], `FocusTag) :: deep_close gs s
   in
-   { status with gstatus = new_gstatus }
+   status#set_stack gstatus
 ;;
 
 let unfocus_tac status =
-  let new_gstatus = 
-    match status.gstatus with
+  let gstatus = 
+    match status#stack with
     | [] -> assert false
     | ([], [], [], `FocusTag) :: s -> s
     | _ -> fail (lazy "can't unfocus, some goals are still open")
   in
-   { status with gstatus = new_gstatus }
+   status#set_stack gstatus
 ;;
 
 let skip_tac status =
-  let new_gstatus = 
-    match status.gstatus with
+  let gstatus = 
+    match status#stack with
     | [] -> assert false
     | (gl, t, k, tag) :: s -> 
         let gl = List.map switch_of_loc gl in
@@ -150,7 +150,7 @@ let skip_tac status =
         else 
           ([],t,k,tag) :: s
   in
-   { status with gstatus = new_gstatus }
+   status#set_stack gstatus
 ;;
 
 let block_tac l status =
@@ -158,8 +158,8 @@ let block_tac l status =
 ;;
 
 let compare_statuses ~past ~present =
- let _,_,past,_,_ = past.pstatus in 
- let _,_,present,_,_ = present.pstatus in 
+ let _,_,past,_,_ = past#obj in 
+ let _,_,present,_,_ = present#obj in 
  List.map fst (List.filter (fun (i,_) -> not(List.mem_assoc i past)) present),
  List.map fst (List.filter (fun (i,_) -> not (List.mem_assoc i present)) past)
 ;;
@@ -179,14 +179,17 @@ let compare_statuses ~past ~present =
    (e.g. the tactic could perform a global analysis of the set of goals)
 *)
 
-let exec tac low_status g =
+let exec tac (low_status : #lowtac_status) g =
   let stack = [ [0,Open g], [], [], `NoTag ] in
-  let status = tac { gstatus = stack ; istatus = low_status } in
-   status.istatus
+  let status =
+   (new NTacStatus.status low_status#obj stack)#set_estatus low_status
+  in
+  let status = tac status in
+   (low_status#set_estatus status)#set_obj status#obj
 ;;
 
-let distribute_tac tac status =
-  match status.gstatus with
+let distribute_tac tac (status : #tac_status) =
+  match status#stack with
   | [] -> assert false
   | (g, t, k, tag) :: s ->
       debug_print (lazy ("context length " ^string_of_int (List.length g)));
@@ -210,7 +213,10 @@ let distribute_tac tac status =
             in
             aux s go gc loc_tl
       in
-      let s0, go0, gc0 = status.istatus, [], [] in
+      let s0 =
+       (new NTacStatus.status status#obj ())#set_estatus
+        (status :> NEstatus.status) in
+      let s0, go0, gc0 = s0, [], [] in
       let sn, gon, gcn = aux s0 go0 gc0 g in
       debug_print (lazy ("opened: "
         ^ String.concat " " (List.map string_of_int gon)));
@@ -219,7 +225,7 @@ let distribute_tac tac status =
       let stack =
         (zero_pos gon, t @~- gcn, k @~- gcn, tag) :: deep_close gcn s
       in
-       { gstatus = stack; istatus = sn }
+       ((status#set_stack stack)#set_obj(sn:>lowtac_status)#obj)#set_estatus sn
 ;;
 
 let atomic_tac htac = distribute_tac (exec htac) ;;
@@ -232,36 +238,30 @@ let try_tac tac status =
 ;;
 
 let first_tac tacl status =
-  let res = HExtlib.list_findopt
-    (fun tac _ ->
-       try Some (tac status) with
-	   NTacStatus.Error _ -> None) tacl
+  let res = 
+   HExtlib.list_findopt
+    (fun tac _ -> try Some (tac status) with NTacStatus.Error _ -> None) tacl
   in
     match res with
-      | None -> raise (NTacStatus.Error (lazy("No tactic left")))
+      | None -> fail (lazy "No tactics left")
       | Some x -> x
 ;;
 
-let exact_tac t = distribute_tac (fun status goal ->
+let exact_tac t : 's tactic = distribute_tac (fun status goal ->
  let goalty = get_goalty status goal in
  let status, t = disambiguate status t (Some goalty) (ctx_of goalty) in
  instantiate status goal t)
 ;;
 
-let assumption status goal =
+let assumption_tac status = distribute_tac (fun status goal ->
   let gty = get_goalty status goal in
   let context = ctx_of gty in
-  let (htac:NTacStatus.tactic) = 
-    first_tac (List.map
-		 (fun (name,_) -> 
-		    exact_tac ("",0,(Ast.Ident (name,None))))
-		 context)
+  let htac = 
+   first_tac
+    (List.map (fun (name,_) -> exact_tac ("",0,(Ast.Ident (name,None))))
+      context)
   in
-    exec htac status goal
-;;
-
-let assumption_tac =
-  distribute_tac assumption
+    exec htac status goal) status
 ;;
 
 let find_in_context name context =
@@ -286,9 +286,9 @@ let clear_tac names =
           fail (lazy ("hypothesis '" ^ name ^ "' not found"))) 
      names
    in
-   let n,h,metasenv,subst,o = status.pstatus in
+   let n,h,metasenv,subst,o = status#obj in
    let metasenv,subst,_ = NCicMetaSubst.restrict metasenv subst goal js in
-    { status with pstatus = n,h,metasenv,subst,o })
+    status#set_obj (n,h,metasenv,subst,o))
 ;;
 
 let generalize0_tac args =
@@ -467,8 +467,7 @@ let elim_tac ~what ~where =
      let sort = HExtlib.unopt !sort in
      let ity = HExtlib.unopt !indtyinfo in
      let NReference.Ref (uri, _) = ity.reference in
-     let istatus, sort = term_of_cic_term status.istatus sort (ctx_of sort) in
-     let status = { status with istatus = istatus } in
+     let status, sort = term_of_cic_term status sort (ctx_of sort) in
      let name = NUri.name_of_uri uri ^
       match sort with
        | NCic.Sort NCic.Prop -> "_ind"
@@ -572,7 +571,7 @@ let assert0_tac (hyps,concl) = distribute_tac (fun status goal ->
 ;;
 
 let assert_tac seqs status =
- match status.gstatus with
+ match status#stack with
   | [] -> assert false
   | (g,_,_,_) :: s ->
      assert (List.length g = List.length seqs);
@@ -590,24 +589,25 @@ let assert_tac seqs status =
 
 let auto ~params:(l,_) status goal =
   let gty = get_goalty status goal in
-  let n,h,metasenv,subst,o = status.pstatus in
+  let n,h,metasenv,subst,o = status#obj in
   let status,t = term_of_cic_term status gty (ctx_of gty) in
   let status, l = 
     List.fold_left
       (fun (status, l) t ->
         let status, t = disambiguate status t None (ctx_of gty) in
         let status, ty = typeof status (ctx_of t) t in
-	let status, t =  term_of_cic_term status t (ctx_of gty) in
+        let status, t =  term_of_cic_term status t (ctx_of gty) in
         let status, ty = term_of_cic_term status ty (ctx_of ty) in
         (status, (t,ty) :: l))
       (status,[]) l
   in
-  let rdb = status.estatus in
-  let pt, metasenv, subst = 
-    Paramod.nparamod rdb metasenv subst (ctx_of gty) (NCic.Rel ~-1,t) l 
-  in      
-  let status = { status with pstatus = n,h,metasenv,subst,o } in
-  instantiate status goal (NTacStatus.mk_cic_term (ctx_of gty) pt)
+  match
+    NCicParamod.nparamod status metasenv subst (ctx_of gty) (NCic.Rel ~-1,t) l 
+  with
+  | [] -> raise (NTacStatus.Error (lazy "no proof found",None))
+  | (pt, metasenv, subst)::_ -> 
+      let status = status#set_obj (n,h,metasenv,subst,o) in
+      instantiate status goal (NTacStatus.mk_cic_term (ctx_of gty) pt)
 ;;
 
 let auto_tac ~params status =