X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Flambda-delta%2Fbasic_ag%2FbagReduction.ml;h=ca22c1dbc3f44beccf5aa05d6a9debef3cb5eb96;hb=d38cea7e4865091412e1414f5594dd7c124de47e;hp=b0cd88d6cc3b66d41136ec36fae68d2878f1270c;hpb=426005acf6fb05116de5bae20591eefe55a4df00;p=helm.git diff --git a/helm/software/lambda-delta/basic_ag/bagReduction.ml b/helm/software/lambda-delta/basic_ag/bagReduction.ml index b0cd88d6c..ca22c1dbc 100644 --- a/helm/software/lambda-delta/basic_ag/bagReduction.ml +++ b/helm/software/lambda-delta/basic_ag/bagReduction.ml @@ -9,8 +9,10 @@ \ / This software is distributed as is, NO WARRANTY. V_______________________________________________________________ *) +module U = NUri module C = Cps module L = Log +module I = AutItem module B = Bag module O = BagOutput module E = BagEnvironment @@ -19,6 +21,7 @@ module S = BagSubstitution exception LRefNotFound of B.message type machine = { + i: int; c: B.context; s: B.term list } @@ -26,39 +29,56 @@ type machine = { type whd_result = | Sort_ of int | LRef_ of int * B.term option - | GRef_ of int * B.bind + | GRef_ of B.obj | Bind_ of int * B.id * B.term * B.term type ho_whd_result = | Sort of int + | GRef of U.uri * B.term list | Abst of B.term +type ac_result = (int * NUri.uri * Bag.term list) list option + (* Internal functions *******************************************************) +let term_of_whdr = function + | Sort_ h -> B.Sort h + | LRef_ (i, _) -> B.LRef i + | GRef_ (_, uri, _) -> B.GRef uri + | Bind_ (l, id, w, t) -> B.bind_abst l id w t + let level = 5 let error i = raise (LRefNotFound (L.items1 (string_of_int i))) -let empty_machine = {c = B.empty_context; s = []} +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 log2 s c u t = + let sc, su, st = s ^ " in the context", "the term", "and the term" in + L.log O.specs level (L.ct_items2 sc c su u st t) -let contents f c m = - let f gl ges = B.contents (f gl ges) m.c in - B.contents f c +let empty_machine = {i = 0; c = B.empty_context; s = []} -let unwind_to_context f c m = B.append f c m.c +let inc m = {m with i = succ m.i} let unwind_to_term f m t = let map f t (l, id, b) = f (B.Bind (l, id, b, t)) in let f mc = C.list_fold_left f map t mc in B.contents f m.c +let unwind_stack f m = + let map f v = unwind_to_term f m v in + C.list_map f map m.s + let get f c m i = let f = function | Some (_, b) -> f b | None -> error i in let f c = B.get f c i in - unwind_to_context f c m + B.append f c m.c let push f c m l id w = assert (m.s = []); @@ -69,7 +89,7 @@ let push f c m l id w = let rec whd f c m x = match x with | B.Sort h -> f m (Sort_ h) | B.GRef uri -> - let f (i, _, b) = f m (GRef_ (i, b)) in + let f obj = f m (GRef_ obj) in E.get_obj f uri | B.LRef i -> let f = function @@ -84,71 +104,90 @@ let rec whd f c m x = match x with begin match m.s with | [] -> f m (Bind_ (l, id, w, t)) | v :: tl -> - let f mc = whd f c {c = mc; s = tl} t in + let f mc = whd f c {m with c = mc; s = tl} t in B.push f m.c l id (B.Abbr (B.Cast (w, v))) end | B.Bind (l, id, b, t) -> let f mc = whd f c {m with c = mc} t in B.push f m.c l id b +let insert f i uri vs = function + | Some l -> f (Some ((i, uri, vs) :: l)) + | None -> assert false + (* Interface functions ******************************************************) let rec ho_whd f c m x = let aux m = function - | Sort_ h -> f c (Sort h) - | Bind_ (_, _, w, _) -> - let f c = f c (Abst w) in unwind_to_context f c m - | LRef_ (_, Some w) -> ho_whd f c m w - | GRef_ (_, B.Abst u) -> ho_whd f c m u - | GRef_ (_, B.Abbr t) -> ho_whd f c m t - | LRef_ (_, None) -> assert false - | GRef_ (_, B.Void) -> assert false + | Sort_ h -> f (Sort h) + | Bind_ (_, _, w, _) -> + let f w = f (Abst w) in unwind_to_term f m w + | LRef_ (_, Some w) -> ho_whd f c m w + | GRef_ (_, uri, B.Abst w) -> + let f = function + | Abst _ as r -> f r + | GRef _ as r -> f r + | Sort _ -> + let f vs = f (GRef (uri, vs)) in unwind_stack f m + in + ho_whd f c m w + | GRef_ (_, _, B.Abbr v) -> ho_whd f c m v + | LRef_ (_, None) -> assert false + | GRef_ (_, _, B.Void) -> assert false in whd aux c m x let ho_whd f c t = - let f c r = L.unbox level; f c r in - L.box level; L.log O.specs level (L.ct_items1 "Now scanning" c t); + let f r = L.unbox level; f r in + L.box level; log1 "Now scanning" c t; ho_whd f c empty_machine t -let rec are_convertible f c m1 t1 m2 t2 = - let rec aux m1 r1 m2 r2 = match r1, r2 with - | Sort_ h1, Sort_ h2 -> f (h1 = h2) - | LRef_ (i1, _), LRef_ (i2, _) -> - if i1 = i2 then are_convertible_stacks f c m1 m2 else f false - | GRef_ (a1, B.Abst _), GRef_ (a2, B.Abst _) -> - if a1 = a2 then are_convertible_stacks f c m1 m2 else f false - | GRef_ (a1, B.Abbr v1), GRef_ (a2, B.Abbr v2) -> - if a1 = a2 then are_convertible_stacks f c m1 m2 else +let rec are_convertible f xl c m1 t1 m2 t2 = + let rec aux m1 r1 m2 r2 = + let u, t = term_of_whdr r1, term_of_whdr r2 in + log2 "Now really converting" c u t; + match r1, r2 with + | Sort_ h1, Sort_ h2 -> + if h1 = h2 then f xl else f None + | LRef_ (i1, _), LRef_ (i2, _) -> + if i1 = i2 then are_convertible_stacks f xl c m1 m2 else f None + | GRef_ (a1, _, B.Abst _), GRef_ (a2, _, B.Abst _) -> + if a1 = a2 then are_convertible_stacks f xl c m1 m2 else f None + | GRef_ (a1, _, B.Abbr v1), GRef_ (a2, _, B.Abbr v2) -> + if a1 = a2 then are_convertible_stacks f xl c m1 m2 else if a1 < a2 then whd (aux m1 r1) c m2 v2 else whd (aux_rev m2 r2) c m1 v1 - | _, GRef_ (_, B.Abbr v2) -> + | _, GRef_ (_, _, B.Abbr v2) -> whd (aux m1 r1) c m2 v2 - | GRef_ (_, B.Abbr v1), _ -> + | GRef_ (_, _, B.Abbr v1), _ -> whd (aux_rev m2 r2) c m1 v1 - | Bind_ (l1, id1, w1, t1), Bind_ (l2, id2, w2, t2) -> - let f b = - if b then - let f c = - S.subst (are_convertible f c m1 t1 m2) l1 l2 t2 - in - push f c m1 l1 id1 w1 - else f false + | Bind_ (l1, id1, w1, t1), Bind_ (l2, id2, w2, t2) -> + let f xl = + let h c = + let m1, m2 = inc m1, inc m2 in + S.subst (are_convertible f xl c m1 t1 m2) l1 l2 t2 + in + if xl = None then f xl else push h c m1 l1 id1 w1 in - are_convertible f c m1 w1 m2 w2 - | _ -> f false + are_convertible f xl c m1 w1 m2 w2 +(* we detect the AUT-QE reduction rule for type/prop inclusion *) + | GRef_ (_, uri, B.Abst _), Bind_ (l1, _, _, _) -> + let g vs = insert f l1 uri vs xl in + if U.eq uri I.imp then unwind_stack g m1 else + if U.eq uri I.all then unwind_stack g m1 else + begin L.warn (U.string_of_uri uri); f None end + | _ -> f None and aux_rev m2 r2 m1 r1 = aux m1 r1 m2 r2 in let f m1 r1 = whd (aux m1 r1) c m2 t2 in whd f c m1 t1 -and are_convertible_stacks f c m1 m2 = +and are_convertible_stacks f xl c m1 m2 = let mm1, mm2 = {m1 with s = []}, {m2 with s = []} in - let map f v1 v2 = are_convertible f c mm1 v1 mm2 v2 in - if List.length m1.s <> List.length m2.s then f false else - C.forall2 f map m1.s m2.s + let map f xl v1 v2 = are_convertible f xl c mm1 v1 mm2 v2 in + if List.length m1.s <> List.length m2.s then f None else + C.list_fold_left2 f map xl m1.s m2.s -let are_convertible f c t1 t2 = +let are_convertible f c u t = let f b = L.unbox level; f b in - L.box level; - L.log O.specs level (L.ct_items2 "Now converting" c t1 "and" c t2); - are_convertible f c empty_machine t1 empty_machine t2 + L.box level; log2 "Now converting" c u t; + are_convertible f (Some []) c empty_machine u empty_machine t