Ast.AttributedTerm (`IdRef id, t)
;;
+let level_of_uri u =
+ let name = NUri.name_of_uri u in
+ assert(String.length name > String.length "Type");
+ String.sub name 4 (String.length name - 4)
+;;
+
+let destroy_nat =
+ let is_nat_URI = NUri.eq (NUri.uri_of_string
+ "cic:/matita/ng/arithmetics/nat/nat.ind") in
+ let is_zero = function
+ | NCic.Const (NReference.Ref (uri, NReference.Con (0, 1, 0))) when
+ is_nat_URI uri -> true
+ | _ -> false
+ in
+ let is_succ = function
+ | NCic.Const (NReference.Ref (uri, NReference.Con (0, 2, 0))) when
+ is_nat_URI uri -> true
+ | _ -> false
+ in
+ let rec aux acc = function
+ | NCic.Appl [he ; tl] when is_succ he -> aux (acc + 1) tl
+ | t when is_zero t -> Some acc
+ | _ -> None
+ in
+ aux 0
+
(* CODICE c&p da NCicPp *)
let nast_of_cic0 status
~(idref:
idref (Ast.Meta
(n, List.map (fun x -> Some (k ~context (NCicSubstitution.lift s x))) l))
| NCic.Sort NCic.Prop -> idref (Ast.Sort `Prop)
- | NCic.Sort NCic.Type _ -> idref (Ast.Sort `Set)
- (* CSC: | C.Sort (C.Type []) -> F.fprintf f "Type0"
- | C.Sort (C.Type [false, u]) -> F.fprintf f "%s" (NUri.name_of_uri u)
- | C.Sort (C.Type [true, u]) -> F.fprintf f "S(%s)" (NUri.name_of_uri u)
- | C.Sort (C.Type l) ->
- F.fprintf f "Max(";
- aux ctx (C.Sort (C.Type [List.hd l]));
- List.iter (fun x -> F.fprintf f ",";aux ctx (C.Sort (C.Type [x])))
- (List.tl l);
- F.fprintf f ")"*)
- (* CSC: qua siamo grezzi *)
+ | NCic.Sort NCic.Type [] -> idref (Ast.Sort `Set)
+ | NCic.Sort NCic.Type ((`Type,u)::_) ->
+ idref(Ast.Sort (`NType (level_of_uri u)))
+ | NCic.Sort NCic.Type ((`CProp,u)::_) ->
+ idref(Ast.Sort (`NCProp (level_of_uri u)))
+ | NCic.Sort NCic.Type ((`Succ,u)::_) ->
+ idref(Ast.Sort (`NType (level_of_uri u ^ "+1")))
| NCic.Implicit `Hole -> idref (Ast.UserInput)
| NCic.Implicit `Vector -> idref (Ast.Implicit `Vector)
| NCic.Implicit _ -> idref (Ast.Implicit `JustOne)
| NCic.Appl l -> NCic.Appl (l@args)
| _ -> NCic.Appl (hd :: args)))
| NCic.Appl args as t ->
- let args =
- if not !Acic2content.hide_coercions then args
- else
- match
- NCicCoercion.match_coercion status ~metasenv ~context ~subst t
- with
- | None -> args
- | Some (_,sats,cpos) ->
+ (match destroy_nat t with
+ | Some n -> idref (Ast.Num (string_of_int n, -1))
+ | None ->
+ let args =
+ if not !Acic2content.hide_coercions then args
+ else
+ match
+ NCicCoercion.match_coercion status ~metasenv ~context ~subst t
+ with
+ | None -> args
+ | Some (_,sats,cpos) ->
(* CSC: sats e' il numero di pi, ma non so cosa farmene! voglio il numero di
argomenti da saltare, come prima! *)
- if cpos < List.length args - 1 then
- List.nth args (cpos + 1) ::
- try snd (HExtlib.split_nth (cpos+sats+2) args) with Failure _->[]
- else
- args
- in
- (match args with
- [arg] -> idref (k ~context arg)
- | _ -> idref (Ast.Appl (List.map (k ~context) args)))
+ if cpos < List.length args - 1 then
+ List.nth args (cpos + 1) ::
+ try snd (HExtlib.split_nth (cpos+sats+2) args)
+ with Failure _->[]
+ else
+ args
+ in
+ (match args with
+ [arg] -> idref (k ~context arg)
+ | _ -> idref (Ast.Appl (List.map (k ~context) args))))
| NCic.Match (NReference.Ref (uri,_) as r,outty,te,patterns) ->
let name = NUri.name_of_uri uri in
(* CSC