(* kernel version: complete, relative, global *)
(* note : fragment of complete lambda-delta serving as abstract layer *)
+module C = Cps
module E = Entity
+module N = Level
type uri = E.uri
type id = E.id
type attrs = E.attrs
-type bind = Abst of term list (* domains *)
- | Abbr of term list (* bodies *)
- | Void of int (* number of exclusions *)
+type bind = Abst of N.level * term list (* level, domains *)
+ | Abbr of term list (* bodies *)
+ | Void of int (* number of exclusions *)
and term = TSort of attrs * int (* attrs, hierarchy index *)
| TLRef of attrs * int * int (* attrs, position indexes *)
(* helpers ******************************************************************)
-let mk_uri si root s =
- let kernel = if si then "crg-si" else "crg" in
- String.concat "/" ["ld:"; kernel; root; s ^ ".ld"]
+let rec tshift t = function
+ | ESort -> t
+ | EBind (e, a, b) -> tshift (TBind (a, b, t)) e
+ | EProj (e, a, d) -> tshift (TProj (a, d, t)) e
+
+let tshift c t = tshift t c
+
+let rec eshift f c = function
+ | ESort -> f c
+ | EBind (e, a, b) -> let f ee = f (EBind (ee, a, b)) in eshift f c e
+ | EProj (e, a, d) -> let f ee = f (EProj (ee, a, d)) in eshift f c e
let empty_lenv = ESort
let push_proj f lenv a e = f (EProj (lenv, a, e))
-let push2 err f lenv attr ?t () = match lenv, t with
- | EBind (e, a, Abst ws), Some t -> f (EBind (e, (attr :: a), Abst (t :: ws)))
- | EBind (e, a, Abbr vs), Some t -> f (EBind (e, (attr :: a), Abbr (t :: vs)))
- | EBind (e, a, Void n), None -> f (EBind (e, (attr :: a), Void (succ n)))
- | _ -> err ()
+let push2 err f lenv ?attr ?t () = match lenv, attr, t with
+ | EBind (e, a, Abst (n, ws)), Some attr, Some t ->
+ f (EBind (e, (attr :: a), Abst (n, t :: ws)))
+ | EBind (e, a, Abst (n, ws)), None, Some t ->
+ f (EBind (e, a, Abst (n, t :: ws)))
+ | EBind (e, a, Abbr vs), Some attr, Some t ->
+ f (EBind (e, (attr :: a), Abbr (t :: vs)))
+ | EBind (e, a, Abbr vs), None, Some t ->
+ f (EBind (e, a, Abbr (t :: vs)))
+ | EBind (e, a, Void n), Some attr, None ->
+ f (EBind (e, (attr :: a), Void (succ n)))
+ | EBind (e, a, Void n), None, None ->
+ f (EBind (e, a, Void (succ n)))
+ | _ -> err ()
(* this id not tail recursive *)
let resolve_lref err f id lenv =
let rec aux f i k = function
| ESort -> err ()
- | EBind (tl, _, Abst [])
+ | EBind (tl, _, Abst (_, []))
| EBind (tl, _, Abbr [])
| EBind (tl, _, Void 0) -> aux f i k tl
- | EBind (tl, a, _) ->
- let err kk = aux f (succ i) (k + kk) tl in
+ | EBind (tl, a, b) ->
+ let err kk = aux f (succ i) (k + kk) tl in
let f j = f i j (k + j) in
E.resolve err f id a
- | EProj _ -> assert false (* TODO *)
+ | EProj (tl, _, d) -> aux f i k (eshift C.start tl d)
in
aux f 0 0 lenv
let rec get_name err f i j = function
| ESort -> err i
- | EBind (tl, _, Abst [])
+ | EBind (tl, _, Abst (_, []))
| EBind (tl, _, Abbr [])
| EBind (tl, _, Void 0) -> get_name err f i j tl
| EBind (_, a, _) when i = 0 ->
let get_index err f i j lenv =
let rec aux f i k = function
| ESort -> err i
- | EBind (tl, _, Abst [])
+ | EBind (tl, _, Abst (_, []))
| EBind (tl, _, Abbr [])
| EBind (tl, _, Void 0) -> aux f i k tl
| EBind (_, a, _) when i = 0 ->
if E.count_names a > j then f (k + j) else err i
| EBind (tl, a, _) ->
aux f (pred i) (k + E.count_names a) tl
- | EProj _ -> assert false (* TODO *)
+ | EProj (tl, _, d) -> aux f i k (eshift C.start tl d)
in
aux f i 0 lenv
| ESort -> ns
| EBind (tl, a, _) -> names_of_lenv (E.rev_append_names ns a) tl
| EProj (tl, _, e) -> names_of_lenv (names_of_lenv ns e) tl
+
+let rec get i = function
+ | ESort -> ESort, [], Void 0
+ | EBind (e, _, Abst (_, []))
+ | EBind (e, _, Abbr [])
+ | EBind (e, _, Void 0) -> get i e
+ | EBind (e, a, b) when i = 0 -> e, a, b
+ | EBind (e, _, _) -> get (pred i) e
+ | EProj (e, _, d) -> get i (eshift C.start e d)
+
+let get e i = get i e