X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Flambda-delta%2Fbasic_rg%2FbrgType.ml;h=a35a9c32afe3ca657bd381a1586c359cc3d5f40b;hb=f00757144b2cd7e6457fed55dbc1309d11a542dc;hp=fd240994543168287d2c42353561d664d36c3171;hpb=41bf338d7e638ebb5d97e525055bff05b1f0f045;p=helm.git diff --git a/helm/software/lambda-delta/basic_rg/brgType.ml b/helm/software/lambda-delta/basic_rg/brgType.ml index fd2409945..a35a9c32a 100644 --- a/helm/software/lambda-delta/basic_rg/brgType.ml +++ b/helm/software/lambda-delta/basic_rg/brgType.ml @@ -9,85 +9,127 @@ \ / 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 B.message +type message = (R.kam, B.term) Log.message (* Internal functions *******************************************************) let level = 4 -let error1 s c t = - raise (TypeError (L.ct_items1 s c t)) +let message1 st1 m t1 = + L.et_items1 "In the environment" m st1 t1 -let error2 s1 c1 t1 s2 c2 t2 = - raise (TypeError (L.ct_items2 s1 c1 t1 s2 c2 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 ~si m u w v = + let err _ = error3 err m v w u in + R.are_convertible err f ~si m u m w -let rec type_of f g c x = - L.log O.specs level (L.ct_items1 "now checking" c x); +let assert_applicability err f ~si m u w v = + let f mu = function + | B.Sort _ -> error1 err "not a function type" m u + | B.Bind (B.Abst (_, u), _) -> + let err _ = error3 err m v w ~mu u in + R.are_convertible err f ~si mu u m w + | _ -> assert false + in + R.xwhd f m u + +let rec b_type_of err f ~si g m x = + log1 "Now checking" m x; match x with - | B.Sort h -> f (B.Sort (g h)) - | B.LRef i -> + | 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 w - | Some (_, B.Abbr (B.Cast (w, v))) -> f w - | Some (_, B.Abbr _) -> assert false - | Some (_, B.Void) -> - error1 "reference to excluded variable" c x - | None -> - error1 "variable not found" c x + | B.Abst (_, w) -> + S.lift (f x) (succ i) (0) w + | B.Abbr (_, B.Cast (_, w, _)) -> + S.lift (f x) (succ i) (0) w + | B.Abbr _ -> assert false + | B.Void _ -> + error1 err "reference to excluded variable" m x in - B.get f c i - | B.GRef uri -> + let err _ = error1 err "reference to unknown variable" m x in + R.get err f m 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 -> - error1 "reference to excluded object" c x + | _, _, Y.Abst w -> f x w + | _, _, Y.Abbr (B.Cast (_, w, _)) -> f x w + | _, _, Y.Abbr _ -> assert false + in + let err _ = error1 err "reference to unknown entry" m x in + E.get_entity err f uri + | B.Bind (B.Abbr (a, 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 - 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 = B.push f c id (B.Abbr u) in - let f uu = match u with - | B.Cast _ -> f u - | _ -> f (B.Cast (uu, u)) + let f xv m = b_type_of err (f xv) ~si g m t in + let f xv = R.push (f xv) m (B.abbr a xv) in + let f xv vv = match xv with + | B.Cast _ -> f xv + | _ -> f (B.Cast ([], vv, xv)) 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 _ = B.push f c id (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 - B.push f c id B.Void - | B.Appl (v, t) -> - let f tt cc = function - | R.Sort _ -> error1 "not a function" c t - | R.Abst w -> - L.log O.specs (succ level) (L.ct_items1 "Just scanned" cc 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 (R.are_convertible f cc w) g c v + type_of err f ~si g m v + | B.Bind (B.Abst (a, 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 - 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 + let f xu m = b_type_of err (f xu) ~si g m t in + let f xu _ = R.push (f xu) m (B.abst a xu) in + type_of err f ~si g m u + | B.Bind (B.Void a as b, t) -> + let f xt tt = + f (A.sh1 t xt x (B.bind b)) (B.bind b tt) in - let f _ = type_of (R.are_convertible f c u) g c t in - type_of f g c u + let f m = b_type_of err f ~si g m t in + R.push f m b + | 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 ~si m tt vv xv + in + let f xv vv = b_type_of err (f xv vv) ~si g m t in + type_of err f ~si g 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 ~si m xu tt xt + in + let f xu _ = b_type_of err (f xu) ~si g m t in + type_of err f ~si g m u + +(* Interface functions ******************************************************) + +and type_of err f ?(si=false) g m x = + let f t u = L.unbox level; f t u in + L.box level; b_type_of err f ~si g m x