X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=ocaml%2Fnum.ml;h=4e44c79731ec475477082a9418791329fb6a2176;hb=c375766f77eaa5893bb5ae93cfa70d91fd372022;hp=82c4b3803e4a0868e6e96eb58d935b9cae146628;hpb=09ecd6ebdb7d96386bd79a7117930aba4635f778;p=fireball-separation.git

diff --git a/ocaml/num.ml b/ocaml/num.ml
index 82c4b38..4e44c79 100644
--- a/ocaml/num.ml
+++ b/ocaml/num.ml
@@ -118,31 +118,36 @@ end
 
 (* let rec string_of_term l  = fun _ -> "";; *)
 
-let rec string_of_term l  =
- let rec string_of_term_w_pars l  = function
-  | `Var(n,ar) -> print_name l n ^ (if debug_display_arities then ":" ^ string_of_int ar else "")
+let rec string_of_term =
+ let boundvar x = "v" ^ string_of_int x in
+ let varname lev l n =
+  if n < lev then boundvar (lev-n-1)
+   else if n < List.length l then List.nth l (n-lev)
+    else "`" ^ string_of_int (n-lev) in
+ let rec string_of_term_w_pars lev l  = function
+  | `Var(n,ar) -> varname lev l n ^ (if debug_display_arities then ":" ^ string_of_int ar else "")
   | `N n -> string_of_int n
-  | `I _ as t -> "(" ^ string_of_term_no_pars_app l t ^ ")"
+  | `I _ as t -> "(" ^ string_of_term_no_pars_app lev l t ^ ")"
   | `Lam(_,`Bottom) -> "BOMB"
-  | `Lam _ as t -> "(" ^ string_of_term_no_pars_lam l t ^ ")"
+  | `Lam _ as t -> "(" ^ string_of_term_no_pars_lam lev l t ^ ")"
   | `Match(t,(v,ar),bs_lift,bs,args) ->
-     "["^ string_of_var v ^ (if debug_display_arities then ":"^ string_of_int ar else "") ^",match " ^ string_of_term_no_pars l (t :> nf) ^
-     " with " ^ String.concat " | " (List.map (fun (n,t) -> string_of_int n ^ " => " ^ string_of_term l (lift bs_lift (t :> nf))) !bs) ^ "] " ^
+      (* assert (bs_lift = lev); *)
+     "["^ varname lev l v ^ (if debug_display_arities then ":"^ string_of_int ar else "") ^",match " ^ string_of_term_no_pars lev l (t :> nf) ^
+     " with " ^ String.concat " | " (List.map (fun (n,t) -> string_of_int n ^ " => " ^ string_of_term l (t :> nf)) !bs) ^ "] " ^
      String.concat " " (List.map (string_of_term l) (args :> nf list)) ^ ")"
   | `Bottom -> "BOT"
   | `Pacman -> "PAC"
- and string_of_term_no_pars_app l  = function
-  | `I((n,ar), args) -> print_name l n ^ (if debug_display_arities then ":" ^ string_of_int ar else "") ^ " " ^ String.concat " " (List.map (string_of_term_w_pars l) (Listx.to_list args :> nf list))
-  | #nf as t -> string_of_term_w_pars l t
- and string_of_term_no_pars_lam l  = function
+ and string_of_term_no_pars_app lev l  = function
+  | `I((n,ar), args) -> varname lev l n ^ (if debug_display_arities then ":" ^ string_of_int ar else "") ^ " " ^ String.concat " " (List.map (string_of_term_w_pars lev l) (Listx.to_list args :> nf list))
+  | #nf as t -> string_of_term_w_pars lev l t
+ and string_of_term_no_pars_lam lev l  = function
   | `Lam(_,`Bottom) -> "BOMB"
-  | `Lam(_,t) -> let name = string_of_var (List.length l) in
-     "λ" ^ name ^ ". " ^ (string_of_term_no_pars_lam (name::l) t)
-  | _ as t -> string_of_term_no_pars l t
- and string_of_term_no_pars l  = function
-  | `Lam _ as t -> string_of_term_no_pars_lam l t
-  | #nf as t -> string_of_term_no_pars_app l t
- in string_of_term_no_pars l
+  | `Lam(_,t) -> "λ" ^ boundvar lev ^ ". " ^ (string_of_term_no_pars_lam (lev+1) l t)
+  | _ as t -> string_of_term_no_pars lev l t
+ and string_of_term_no_pars lev l = function
+  | `Lam _ as t -> string_of_term_no_pars_lam lev l t
+  | #nf as t -> string_of_term_no_pars_app lev l t
+ in string_of_term_no_pars 0
 ;;
 
 let print ?(l=[]) = string_of_term l;;
@@ -172,6 +177,7 @@ let cast_to_i_num_var =
     assert false (* algorithm failed *)
 
 let rec set_arity arity = function
+(* FIXME because onlt variables should be in branches of matches, one day *)
 | `Var(n,_) -> `Var(n,arity)
 | `N _ | `Bottom | `Pacman as t -> t
 | `Lam(false, t) -> `Lam(false, set_arity arity t)
@@ -244,11 +250,11 @@ and subst truelam delift_by_one what (with_what : nf(*_nob*)) (where : nf) =
    | `N _ as x -> x
    | `Match(t,v,bs_lift,bs,args) ->
        let bs_lift = bs_lift + if delift_by_one then -1 else 0 in
-       let l' = l - bs_lift  in
-       let with_what' = lift l' (with_what :> nf) in
+       (* let l' = l - bs_lift  in *)
+       (* let with_what' = lift l' (with_what :> nf) in *)
        (* The following line should be the identity when delift_by_one = true because we
           are assuming the ts to not contain lambda-bound variables. *)
-       bs := List.map (fun (n,t) -> n,subst truelam false what with_what' t) !bs ;
+       (* bs := List.map (fun (n,t) -> n,subst truelam false what with_what' t) !bs ; *)
        let body = aux_i_num_var l t in
        mk_match body v bs_lift bs (List.map (aux l) (args :> nf list))
  and aux l(*lift*) =
@@ -266,28 +272,6 @@ prerr_endline ("subst l:" ^ string_of_int l ^ " delift_by_one:" ^ string_of_bool
 
 (************ Parsing ************************************)
 
-let parse' strs =
-  let fix_arity = function
-   | `I((n,_),args) -> `I((n,1+Listx.length args),args)
-   | _ -> assert false in
-  let (tms, free) = Parser.parse_many strs in
-  (* Replace pacmans and bottoms *)
-  let n_bot = try Util.index_of "BOT" free with Not_found -> min_int in
-  let n_pac = try Util.index_of "PAC" free with Not_found -> min_int in
-  let n_bomb = try Util.index_of "BOMB" free with Not_found -> min_int in
-  let fix lev v =
-   if v = lev + n_bot then `Bottom
-    else if v = lev + n_pac then `Pacman
-     else if v = lev + n_bomb then `Lam(true, `Bottom)
-      else `Var(v,1) in (* 1 by default when variable not applied *)
-  (* Fix arity *)
-  let rec aux lev = function
-   | Parser.Lam t -> `Lam (true, aux (lev+1) t)
-   | Parser.App (t1, t2) -> fix_arity (mk_app (aux lev t1) (aux lev t2))
-   | Parser.Var v -> fix lev v in
-  List.map (aux 0) tms, free
-;;
-
 (************** Algorithm(s) ************************)
 
 let eta_compare x y =