Objects are now used to represent also the tactic status.

[helm.git] / helm / software / components / ng_tactics / nTacStatus.ml

diff --git a/helm/software/components/ng_tactics/nTacStatus.ml b/helm/software/components/ng_tactics/nTacStatus.ml
index cffda3b174376ea6921a58540bdb9f6cc4119f7e..dc3816dab26a01c2c7ffaa197b8e5a8155706777 100644 (file)
--- a/helm/software/components/ng_tactics/nTacStatus.ml
+++ b/helm/software/components/ng_tactics/nTacStatus.ml
@@ -14,30 +14,25 @@
 exception Error of string lazy_t
 let fail msg = raise (Error msg)
 
-type lowtac_status = {
-        pstatus : NCic.obj;
-        estatus : NEstatus.status;
-}
-
-type lowtactic = lowtac_status -> int -> lowtac_status 
-
-type tac_status = {
-        gstatus : Continuationals.Stack.t; 
-        istatus : lowtac_status;
-} 
-
-type tactic = tac_status -> tac_status
+class pstatus =
+ fun (o: NCic.obj) ->
+  object
+   inherit NEstatus.status
+   val obj = o
+   method obj = obj
+   method set_obj o = {< obj = o >}
+  end
 
 type tactic_term = CicNotationPt.term Disambiguate.disambiguator_input
 type tactic_pattern = GrafiteAst.npattern Disambiguate.disambiguator_input
 
 let pp_tac_status status = 
-  prerr_endline (NCicPp.ppobj status.istatus.pstatus)
+  prerr_endline (NCicPp.ppobj status#obj)
 ;;
 
 let pp_lowtac_status status = 
   prerr_endline "--------------------------------------------";
-  prerr_endline (NCicPp.ppobj status.pstatus)
+  prerr_endline (NCicPp.ppobj status#obj)
 ;;
 
 type cic_term = NCic.conjecture (* name, context, term *)
@@ -45,7 +40,7 @@ let ctx_of (_,c,_) = c ;;
 
 let relocate status destination (name,source,t as orig) =
  if source == destination then status, orig else
-  let u, d, metasenv, subst, o = status.pstatus in 
+  let u, d, metasenv, subst, o = status#obj in 
   let rec lcp ctx j i = function
     | (n1, NCic.Decl t1 as e)::cl1, (n2, NCic.Decl t2)::cl2 ->
         if n1 = n2 && 
@@ -83,13 +78,13 @@ let relocate status destination (name,source,t as orig) =
   let (metasenv, subst), t =
     NCicMetaSubst.delift 
        ~unify:(fun m s c t1 t2 -> 
-         try Some (NCicUnification.unify status.estatus m s c t1 t2)
+         try Some (NCicUnification.unify status m s c t1 t2)
          with 
           | NCicUnification.UnificationFailure _ 
           | NCicUnification.Uncertain _ -> None) 
      metasenv subst source 0 lc t
   in
-  let status = { status with pstatus = u, d, metasenv, subst, o } in
+  let status = status#set_obj (u, d, metasenv, subst, o) in
   status, (name, destination, t)
 ;;
 
@@ -99,7 +94,7 @@ let term_of_cic_term s t c =
 ;;
 
 let ppterm status t =
- let uri,height,metasenv,subst,obj = status.pstatus in
+ let uri,height,metasenv,subst,obj = status#obj in
  let _,context,t = t in
   NCicPp.ppterm ~metasenv ~subst ~context t
 ;;
@@ -111,32 +106,31 @@ let disambiguate status t ty context =
    | Some ty -> 
        let status, (_,_,x) = relocate status context ty in status, Some x 
  in
- let uri,height,metasenv,subst,obj = status.pstatus in
- let metasenv, subst, estatus, t = 
-   GrafiteDisambiguate.disambiguate_nterm expty
-    status.estatus context metasenv subst t 
+ let uri,height,metasenv,subst,obj = status#obj in
+ let metasenv, subst, status, t = 
+   GrafiteDisambiguate.disambiguate_nterm expty status context metasenv subst t 
  in
  let new_pstatus = uri,height,metasenv,subst,obj in
- { estatus = estatus; pstatus = new_pstatus }, (None, context, t) 
+  status#set_obj new_pstatus, (None, context, t) 
 ;;
 
 let typeof status ctx t =
   let status, (_,_,t) = relocate status ctx t in
-  let _,_,metasenv,subst,_ = status.pstatus in
+  let _,_,metasenv,subst,_ = status#obj in
   let ty = NCicTypeChecker.typeof ~subst ~metasenv ctx t in
   status, (None, ctx, ty)
 ;;
   
 let whd status ?delta ctx t =
   let status, (name,_,t) = relocate status ctx t in
-  let _,_,_,subst,_ = status.pstatus in
+  let _,_,_,subst,_ = status#obj in
   let t = NCicReduction.whd ~subst ?delta ctx t in
   status, (name, ctx, t)
 ;;
   
 let normalize status ?delta ctx t =
   let status, (name,_,t) = relocate status ctx t in
-  let _,_,_,subst,_ = status.pstatus in
+  let _,_,_,subst,_ = status#obj in
   let t = NCicTacReduction.normalize ~subst ?delta ctx t in
   status, (name, ctx, t)
 ;;
@@ -144,11 +138,9 @@ let normalize status ?delta ctx t =
 let unify status ctx a b =
   let status, (_,_,a) = relocate status ctx a in
   let status, (_,_,b) = relocate status ctx b in
-  let n,h,metasenv,subst,o = status.pstatus in
-  let metasenv, subst = 
-    NCicUnification.unify status.estatus metasenv subst ctx a b
-  in
-  { status with pstatus = n,h,metasenv,subst,o }
+  let n,h,metasenv,subst,o = status#obj in
+  let metasenv, subst = NCicUnification.unify status metasenv subst ctx a b in
+   status#set_obj (n,h,metasenv,subst,o)
 ;;
 
 let refine status ctx term expty =
@@ -158,17 +150,15 @@ let refine status ctx term expty =
     | Some e -> 
         let status, (n,_, e) = relocate status ctx e in status, n, Some e
   in
-  let name,height,metasenv,subst,obj = status.pstatus in
-  let rdb = status.estatus in
-  let metasenv, subst, t, ty = 
-   NCicRefiner.typeof rdb metasenv subst ctx term expty
+  let name,height,metasenv,subst,obj = status#obj in
+  let metasenv,subst,t,ty = 
+   NCicRefiner.typeof status metasenv subst ctx term expty
   in
-  { status with pstatus = name,height,metasenv,subst,obj }, 
-  (nt,ctx,t), (ne,ctx,ty)
+   status#set_obj (name,height,metasenv,subst,obj), (nt,ctx,t), (ne,ctx,ty)
 ;;
 
-let get_goalty (status : lowtac_status) (g : int) =
- let _,_,metasenv,_,_ = status.pstatus in
+let get_goalty status g =
+ let _,_,metasenv,_,_ = status#obj in
  List.assoc g metasenv
 ;;
 
@@ -178,31 +168,31 @@ let instantiate status i t =
    refine status (ctx_of gty) t (Some gty) 
  in
 
- let name,height,metasenv,subst,obj = status.pstatus in
+ let name,height,metasenv,subst,obj = status#obj in
  let metasenv = List.filter (fun j,_ -> j <> i) metasenv in
  let subst = (i, (gname, context, t, ty)) :: subst in
- { status with pstatus = (name,height,metasenv,subst,obj) }
+  status#set_obj (name,height,metasenv,subst,obj)
 ;;
 
 let mk_meta status ?name ctx bo_or_ty =
   match bo_or_ty with
   | `Decl ty ->
       let status, (_,_,ty) = relocate status ctx ty in
-      let n,h,metasenv,subst,o = status.pstatus in
+      let n,h,metasenv,subst,o = status#obj in
       let metasenv, _, instance, _ = 
         NCicMetaSubst.mk_meta ?name metasenv ctx (`WithType ty)
       in
-      let status = { status with pstatus = n,h,metasenv,subst,o } in
+      let status = status#set_obj (n,h,metasenv,subst,o) in
       status, (None,ctx,instance)
   | `Def bo ->
       let status, (_,_,bo_ as bo) = relocate status ctx bo in
       let status, (_,_,ty) = typeof status ctx bo in
-      let n,h,metasenv,subst,o = status.pstatus in
+      let n,h,metasenv,subst,o = status#obj in
       let metasenv, metano, instance, _ = 
         NCicMetaSubst.mk_meta ?name metasenv ctx (`WithType ty) in
       let metasenv = List.filter (fun j,_ -> j <> metano) metasenv in
       let subst = (metano, (name, ctx, bo_, ty)) :: subst in
-      let status = { status with pstatus = n,h,metasenv,subst,o } in
+      let status = status#set_obj (n,h,metasenv,subst,o) in
       status, (None,ctx,instance)
 ;;
 
@@ -241,7 +231,7 @@ let select_term
          let status , (_,_,t) = found status (None, ctx, t) in 
          (status,true),t
       else
-        let _,_,_,subst,_ = status.pstatus in
+        let _,_,_,subst,_ = status#obj in
         match t with
         | NCic.Meta (i,lc) when List.mem_assoc i subst ->
             let _,_,t,_ = NCicUtils.lookup_subst i subst in
@@ -253,7 +243,7 @@ let select_term
      in 
        aux ctx (status,false) t
   in 
-  let _,_,_,subst,_ = low_status.pstatus in
+  let _,_,_,subst,_ = low_status#obj in
   let rec select status ctx pat cic = 
     match pat, cic with
     | _, NCic.Meta (i,lc) when List.mem_assoc i subst ->
@@ -336,6 +326,23 @@ let mk_cic_term c t = None,c,t ;;
 
 let apply_subst status ctx t =
  let status, (name,_,t) = relocate status ctx t in
- let _,_,_,subst,_ = status.pstatus in
+ let _,_,_,subst,_ = status#obj in
   status, (name, ctx, NCicUntrusted.apply_subst subst ctx t)
 ;;
+
+class ['stack] status =
+ fun (o: NCic.obj) (s: 'stack) ->
+  object
+   inherit (pstatus o)
+   val stack = s
+   method stack = stack
+   method set_stack s = {< stack = s >}
+  end
+
+class type lowtac_status = [unit] status
+
+type 'status lowtactic = #lowtac_status as 'status -> int -> 'status
+
+class type tac_status = [Continuationals.Stack.t] status
+
+type 'status tactic = #tac_status as 'status -> 'status