(* kernel version: basic, relative, global *)
(* note : ufficial basic lambda-delta *)
-type uri = Item.uri
-type id = Item.id
+type uri = Entity.uri
+type id = Entity.id
+type attrs = Entity.attrs
-type attr = Name of bool * id (* real?, name *)
- | Apix of int (* additional position index *)
-
-type attrs = attr list
-
-type bind = Void (* exclusion *)
- | Abst of term (* abstraction *)
- | Abbr of term (* abbreviation *)
+type bind = Void (* *)
+ | Abst of term (* type *)
+ | Abbr of term (* body *)
and term = Sort of attrs * int (* attrs, hierarchy index *)
| LRef of attrs * int (* attrs, position index *)
| Appl of attrs * term * term (* attrs, argument, function *)
| Bind of attrs * bind * term (* attrs, binder, scope *)
-type obj = bind Item.obj (* age, uri, binder *)
+type entity = term Entity.entity (* attrs, uri, binder *)
-type item = bind Item.item
+type lenv = Null
+(* Cons: tail, relative local environment, attrs, binder *)
+ | Cons of lenv * lenv * attrs * bind
-type context = Null
-(* Cons: tail, relative context, attrs, binder *)
- | Cons of context * context option * attrs * bind
+(* helpers ******************************************************************)
-type message = (context, term) Log.item list
+let mk_uri root s =
+ String.concat "/" ["ld:"; "brg"; root; s ^ ".ld"]
(* Currified constructors ***************************************************)
let bind_abbr a v t = Bind (a, Abbr v, t)
-(* context handling functions ***********************************************)
-
-let empty_context = Null
-
-let push f es ?c a b =
- let es = Cons (es, c, a, b) in f es
-
-let get err f es i =
- let rec aux j = function
- | Null -> err i
- | Cons (tl, None, a, b) when j = 0 -> f tl a b
- | Cons (_, Some c, a, b) when j = 0 -> f c a b
- | Cons (tl, _, _, _) -> aux (pred j) tl
- in
- aux i es
-
-let rec rev_iter f map = function
- | Null -> f ()
- | Cons (tl, None, a, b) ->
- let f () = map f tl a b in rev_iter f map tl
- | Cons (tl, Some c, a, b) ->
- let f () = map f c a b in rev_iter f map tl
-
-let rec fold_left f map x = function
- | Null -> f x
- | Cons (tl, _, a, b) ->
- let f x = fold_left f map x tl in
- map f x a b
-
-let rec name err f = function
- | [] -> err ()
- | Name (r, n) :: _ -> f n r
- | _ :: tl -> name err f tl
-
-let rec apix err f = function
- | [] -> err ()
- | Apix i :: _ -> f i
- | _ :: tl -> apix err f tl
+let bind_void a t = Bind (a, Void, t)
+
+(* local environment handling functions *************************************)
+
+let empty = Null
+
+let push e c a b = Cons (e, c, a, b)
+
+let rec get i = function
+ | Null -> Null, Null, [], Void
+ | Cons (e, c, a, b) when i = 0 -> e, c, a, b
+ | Cons (e, _, _, _) -> get (pred i) e
+
+let get e i = get i e
+
+(* used in BrgOutput.pp_lenv *)
+let rec fold_right f map e x = match e with
+ | Null -> f x
+ | Cons (e, c, a, b) -> fold_right (map f e c a b) map e x
+
+(* used in MetaBrg.unwind_to_xlate_term *)
+let rec fold_left map x = function
+ | Null -> x
+ | Cons (e, _, a, b) -> fold_left map (map x a b) e