X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Flambda-delta%2Fbasic_rg%2FbrgType.ml;h=8b119e5e25aa165cabc483a3ad48faf13aa11295;hb=e17c4da82bd52712f03c112660c52eb8f1783843;hp=60b5b75bcc54d540a5d063e8d9aaba1aac9b38b4;hpb=8659e85d49be1ad72622d4d3a73d384b744c3c08;p=helm.git diff --git a/helm/software/lambda-delta/basic_rg/brgType.ml b/helm/software/lambda-delta/basic_rg/brgType.ml index 60b5b75bc..8b119e5e2 100644 --- a/helm/software/lambda-delta/basic_rg/brgType.ml +++ b/helm/software/lambda-delta/basic_rg/brgType.ml @@ -9,82 +9,123 @@ \ / This software is distributed as is, NO WARRANTY. V_______________________________________________________________ *) +module U = NUri +module C = Cps +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 (R.context, B.term) Log.item list +type message = (R.kam, B.term) Log.message (* Internal functions *******************************************************) -let error1 s c t = - raise (TypeError (L.ct_items1 s c t)) +let level = 4 -let error2 s1 c1 t1 s2 c2 t2 = - raise (TypeError (L.ct_items2 s1 c1 t1 s2 c2 t2)) +let message1 st1 m t1 = + L.et_items1 "In the environment" m st1 t1 -let are_convertible f c t1 t2 = - L.log O.specs 4 (L.ct_items2 "Now converting" c t1 "and" c t2); - R.are_convertible f c t1 t2 +let log1 s m t = + let s = s ^ " the term" in + L.log R.specs level (message1 s m t) -(* Interface functions ******************************************************) +let error1 err s m t = + err (message1 s m t) + +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 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 type_of f g c x = - L.log O.specs 5 (L.ct_items1 "now checking" c x); +let rec b_type_of err f st m x = + log1 "Now checking" m x; match x with - | B.Sort h -> f (B.Sort (g h)) - | B.LRef i -> - let f = function - | B.Abst w -> f w - | B.Abbr (B.Cast (w, v)) -> f w - | B.Abbr _ -> assert false - | B.Void -> assert false + | B.Sort (a, h) -> + let h = H.apply h in f x (B.Sort (a, h)) + | B.LRef (_, 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) -> + 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 (A.sh2 v xv t xt x (B.bind_abbr a)) (B.bind_abbr a xv tt) in - R.get f c i - | B.GRef uri -> - let f = function - | _, _, B.Abst w -> f w - | _, _, B.Abbr (B.Cast (w, v)) -> f w - | _, _, B.Abbr _ -> assert false - | _, _, B.Void -> assert false + let f xv m = b_type_of err (f xv) st 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 - E.get_obj f uri - | B.Bind (id, B.Abbr u, t) -> - let f tt = f (B.Bind (id, B.Abbr u, tt)) in - let f cc = type_of f g cc t in - let f u = R.push f c (B.Abbr u) in - let f uu = match u with - | B.Cast _ -> f u - | _ -> f (B.Cast (uu, u)) + type_of err f st m v + | B.Bind (a, B.Abst u, t) -> + let f xu xt tt = + f (A.sh2 u xu t xt x (B.bind_abst a)) (B.bind_abst a xu tt) in - type_of f g c u - | B.Bind (id, B.Abst u, t) -> - let f tt = f (B.Bind (id, B.Abst u, tt)) in - let f cc = type_of f g cc t in - let f _ = R.push f c (B.Abst u) in - type_of f g c u - | B.Bind (id, B.Void, t) -> - let f tt = f (B.Bind (id, B.Void, tt)) in - let f cc = type_of f g cc t in - R.push f c B.Void - | B.Appl (v, t) -> - let f tt cc = function - | R.Sort _ -> error1 "not a function" c t - | R.Abst w -> - let f b = - if b then f (B.Appl (v, tt)) else - error2 "the term" c v "must be of type" cc w - in - type_of (are_convertible f cc w) g c v + let f xu m = b_type_of err (f xu) st m t in + let f xu _ = f xu (R.push m a (B.abst xu)) in + type_of err f st m u + | B.Bind (a, B.Void, t) -> + let f xt tt = + f (A.sh1 t xt x (B.bind_void a)) (B.bind_void a tt) in - let f tt = R.ho_whd (f tt) c t in - type_of f g c t - | B.Cast (u, t) -> - let f b = - if b then f u else - error2 "the term" c t "must be of type" c u + b_type_of err f st (R.push m a B.Void) t + + | B.Appl (a, v, t) -> + 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 _ = type_of (are_convertible f c u) g c t in - type_of f g c u + let f xv vv = b_type_of err (f xv vv) st m t in + type_of err f st m v + | B.Cast (a, u, t) -> + 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 _ = b_type_of err (f xu) st m t in + type_of err f st m u + +(* Interface functions ******************************************************) + +and type_of err f st m x = + let f t u = L.unbox level; f t u in + L.box level; b_type_of err f st m x