module U = NUri
module C = Cps
-module S = Share
+module A = Share
module L = Log
module H = Hierarchy
+module Y = Entity
module B = Brg
module O = BrgOutput
module E = BrgEnvironment
+module S = BrgSubstitution
module R = BrgReduction
-exception TypeError of B.message
+type message = (R.kam, B.term) Log.message
(* Internal functions *******************************************************)
let level = 4
-let log1 s c t =
- let sc, st = s ^ " in the context", "the term" in
- L.log O.specs level (L.ct_items1 sc c st t)
+let message1 st1 m t1 =
+ L.et_items1 "In the environment" m st1 t1
-let error1 st c t =
- let sc = "In the context" in
- raise (TypeError (L.ct_items1 sc c st t))
+let log1 s m t =
+ let s = s ^ " the term" in
+ L.log R.specs level (message1 s m t)
-let error3 c t1 t2 t3 =
- let sc, st1, st2, st3 =
- "In the context", "the term", "is of type", "but must be of type"
- in
- raise (TypeError (L.ct_items3 sc c st1 t1 st2 t2 st3 t3))
+let error1 err s m t =
+ err (message1 s m t)
-(* Interface functions ******************************************************)
+let message3 m t1 t2 ?mu t3 =
+ let sm, st1, st2 = "In the environment", "the term", "is of type" in
+ match mu with
+ | Some mu ->
+ let smu, st3 = "but in the environment", "it must be of type" in
+ L.et_items3 sm m st1 t1 st2 t2 ~sc3:smu ~c3:mu st3 t3
+ | None ->
+ let st3 = "but it must be of type" in
+ L.et_items3 sm m st1 t1 st2 t2 st3 t3
+
+let error3 err m t1 t2 ?mu t3 =
+ err (message3 m t1 t2 ?mu t3)
+
+let assert_convertibility err f st m u w v =
+ if R.are_convertible st m u m w then f () else
+ error3 err m v w u
-let si = ref false
+let assert_applicability err f st m u w v =
+ match R.xwhd st m u with
+ | _, B.Sort _ -> error1 err "not a function type" m u
+ | mu, B.Bind (_, B.Abst u, _) ->
+ if R.are_convertible st mu u m w then f () else
+ error3 err m v w ~mu u
+ | _ -> assert false (**)
-let rec b_type_of f g c x =
-(* L.warn "Entering T.b_type_of"; *)
- log1 "Now checking" c x;
+let rec b_type_of err f st g m x =
+ log1 "Now checking" m x;
match x with
| B.Sort (a, h) ->
let f h = f x (B.Sort (a, h)) in H.apply f g h
| B.LRef (_, i) ->
- let f _ = function
- | Some (_, B.Abst w) -> f x w
- | Some (_, B.Abbr (B.Cast (_, w, _))) -> f x w
- | Some (_, B.Abbr _) -> assert false
- | Some (_, B.Void) ->
- error1 "reference to excluded variable" c x
- | None ->
- error1 "variable not found" c x
- in
- B.get f c i
+ begin match R.get m i with
+ | B.Abst w ->
+ f x (S.lift (succ i) (0) w)
+ | B.Abbr (B.Cast (_, w, _)) ->
+ f x (S.lift (succ i) (0) w)
+ | B.Abbr _ -> assert false
+ | B.Void ->
+ error1 err "reference to excluded variable" m x
+ end
| B.GRef (_, uri) ->
- let f = function
- | _, _, B.Abst w -> f x w
- | _, _, B.Abbr (B.Cast (_, w, _)) -> f x w
- | _, _, B.Abbr _ -> assert false
- | _, _, B.Void ->
- error1 "reference to excluded object" c x
- in
- E.get_obj f uri
+ begin match E.get_entity uri with
+ | _, _, Y.Abst w -> f x w
+ | _, _, Y.Abbr (B.Cast (_, w, _)) -> f x w
+ | _, _, Y.Abbr _ -> assert false
+ | _, _, Y.Void ->
+ error1 err "reference to unknown entry" m x
+ end
| B.Bind (a, B.Abbr v, t) ->
let f xv xt tt =
- f (S.sh2 v xv t xt x (B.bind_abbr a)) (B.bind_abbr a xv tt)
+ f (A.sh2 v xv t xt x (B.bind_abbr a)) (B.bind_abbr a xv tt)
in
- let f xv cc = b_type_of (f xv) g cc t in
- let f xv = B.push (f xv) c a (B.Abbr xv) in
+ let f xv m = b_type_of err (f xv) st g m t in
+ let f xv = f xv (R.push m a (B.abbr xv)) in
let f xv vv = match xv with
| B.Cast _ -> f xv
| _ -> f (B.Cast ([], vv, xv))
in
- type_of f g c v
+ type_of err f st g m v
| B.Bind (a, B.Abst u, t) ->
let f xu xt tt =
- f (S.sh2 u xu t xt x (B.bind_abst a)) (B.bind_abst a xu tt)
+ f (A.sh2 u xu t xt x (B.bind_abst a)) (B.bind_abst a xu tt)
in
- let f xu cc = b_type_of (f xu) g cc t in
- let f xu _ = B.push (f xu) c a (B.Abst xu) in
- type_of f g c u
+ let f xu m = b_type_of err (f xu) st g m t in
+ let f xu _ = f xu (R.push m a (B.abst xu)) in
+ type_of err f st g m u
| B.Bind (a, B.Void, t) ->
let f xt tt =
- f (S.sh1 t xt x (B.bind a B.Void)) (B.bind a B.Void tt)
+ f (A.sh1 t xt x (B.bind_void a)) (B.bind_void a tt)
in
- let f cc = b_type_of f g cc t in
- B.push f c a B.Void
+ b_type_of err f st g (R.push m a B.Void) t
+
| B.Appl (a, v, t) ->
- let f xv vv xt tt = function
- | Some w ->
- L.box (succ level);
- L.log O.specs (succ level) (L.t_items1 "Just scanned" c w);
- L.unbox (succ level);
- let f r =
-(* L.warn (Printf.sprintf "Convertible: %b" a); *)
- if r then f (S.sh2 v xv t xt x (B.appl a)) (B.appl a xv tt)
- else error3 c xv vv w
- in
- R.are_convertible f ~si:!si c w vv
- | None ->
- error1 "not a function" c xt
+ let f xv vv xt tt =
+ let f _ = f (A.sh2 v xv t xt x (B.appl a)) (B.appl a xv tt) in
+ assert_applicability err f st m tt vv xv
in
- let f xv vv xt tt = R.domain (f xv vv xt tt) c tt in
- let f xv vv = b_type_of (f xv vv) g c t in
- type_of f g c v
+ let f xv vv = b_type_of err (f xv vv) st g m t in
+ type_of err f st g m v
| B.Cast (a, u, t) ->
- let f xu xt tt r =
- (* L.warn (Printf.sprintf "Convertible: %b" a); *)
- if r then f (S.sh2 u xu t xt x (B.cast a)) xu else error3 c xt tt xu
+ let f xu xt tt =
+ let f _ = f (A.sh2 u xu t xt x (B.cast a)) xu in
+ assert_convertibility err f st m xu tt xt
in
- let f xu xt tt = R.are_convertible ~si:!si (f xu xt tt) c xu tt in
- let f xu _ = b_type_of (f xu) g c t in
- type_of f g c u
+ let f xu _ = b_type_of err (f xu) st g m t in
+ type_of err f st g m u
+
+(* Interface functions ******************************************************)
-and type_of f g c x =
+and type_of err f st g m x =
let f t u = L.unbox level; f t u in
- L.box level; b_type_of f g c x
+ L.box level; b_type_of err f st g m x
projects / helm.git / blobdiff