V_______________________________________________________________ *)
module U = NUri
+module C = Cps
+module S = Share
+module L = Log
+module Y = Entity
+module P = Output
module B = Brg
+module O = BrgOutput
module E = BrgEnvironment
-exception LRefNotFound of string Lazy.t
-
-type environment = int * (B.bind * B.term) list
+type kam = {
+ e: B.lenv;
+ s: (B.lenv * B.term) list;
+ i: int
+}
-type stack = B.term list
+(* Internal functions *******************************************************)
-type context = {
- g: environment;
- l: environment;
- s: stack
-}
+let level = 5
-type whd_result =
- | Sort_ of int
- | LRef_ of int
- | GRef_ of int * U.uri * B.bind
- | Abst_ of B.term
+let log1 s c t =
+ let sc, st = s ^ " in the environment", "the term" in
+ L.log O.specs level (L.et_items1 sc c st t)
-(* Internal functions *******************************************************)
+let log2 s cu u ct t =
+ let s1, s2, s3 = s ^ " in the environment", "the term", "and in the environment" in
+ L.log O.specs level (L.et_items2 s1 cu s2 u ~sc2:s3 ~c2:ct s2 t)
-let push_e f b t (l, e) =
- f (succ l, (b, t) :: e)
+let rec list_and map = function
+ | hd1 :: tl1, hd2 :: tl2 ->
+ if map hd1 hd2 then list_and map (tl1, tl2) else false
+ | l1, l2 -> l1 = l2
-let rec find_e f c i =
- let (gl, ge), (ll, le) = c.g, c.l in
- if i >= gl + ll then raise (LRefNotFound (lazy (string_of_int i)));
- let b, t =
- if i < gl then List.nth ge (gl - (succ i))
- else List.nth le (gl + ll - (succ i))
+(* check closure *)
+let are_alpha_convertible err f t1 t2 =
+ let rec aux f = function
+ | B.Sort (_, p1), B.Sort (_, p2)
+ | B.LRef (_, p1), B.LRef (_, p2) ->
+ if p1 = p2 then f () else err ()
+ | B.GRef (_, u1), B.GRef (_, u2) ->
+ if U.eq u1 u2 then f () else err ()
+ | B.Cast (_, v1, t1), B.Cast (_, v2, t2)
+ | B.Appl (_, v1, t1), B.Appl (_, v2, t2) ->
+ let f _ = aux f (t1, t2) in
+ aux f (v1, v2)
+ | B.Bind (_, b1, t1), B.Bind (_, b2, t2) ->
+ let f _ = aux f (t1, t2) in
+ aux_bind f (b1, b2)
+ | _ -> err ()
+ and aux_bind f = function
+ | B.Abbr v1, B.Abbr v2
+ | B.Abst v1, B.Abst v2 -> aux f (v1, v2)
+ | B.Void, B.Void -> f ()
+ | _ -> err ()
in
- f t b
-
-let rec whd f c t = match t with
- | B.Sort h -> f c t (Sort_ h)
- | B.GRef uri ->
- let f (i, _, b, t) = f c t (GRef_ (i, uri, b)) in
- E.get_obj f uri
- | B.LRef i ->
- let f t = function
- | B.Abst -> f c t (LRef_ i)
- | B.Abbr -> whd f c t
- in
- find_e f c i
- | B.Appl (v, t) -> whd f {c with s = v :: c.s} t
- | B.Bind (_, B.Abbr, v, t) ->
- let f l = whd f {c with l = l} t in
- push_e f B.Abbr v c.l
- | B.Bind (_, B.Abst, w, t) ->
- begin match c.s with
- | [] -> f c t (Abst_ w)
- | v :: tl ->
- let f tl l = whd f {c with l = l; s = tl} t in
- push_e (f tl) B.Abbr v c.l
+ if S.eq t1 t2 then f () else aux f (t1, t2)
+
+let get m i =
+ let _, c, a, b = B.get m.e i in c, a, b
+
+(* to share *)
+let rec step st m x =
+(* L.warn "entering R.step"; *)
+ match x with
+ | B.Sort _ -> m, None, x
+ | B.GRef (_, uri) ->
+ begin match E.get_entity uri with
+ | _, _, Y.Abbr v when st.Y.delta ->
+ P.add ~gdelta:1 (); step st m v
+ | _, _, Y.Abst w when st.Y.rt ->
+ P.add ~grt:1 (); step st m w
+ | a, _, Y.Abbr v ->
+ let e = Y.apix C.err C.start a in
+ m, Some (e, a, B.Abbr v), x
+ | a, _, Y.Abst w ->
+ let e = Y.apix C.err C.start a in
+ m, Some (e, a, B.Abst w), x
+ | _, _, Y.Void -> assert false
+ end
+ | B.LRef (_, i) ->
+ begin match get m i with
+ | c, _, B.Abbr v ->
+ P.add ~ldelta:1 ();
+ step st {m with e = c} v
+ | c, _, B.Abst w when st.Y.rt ->
+ P.add ~lrt:1 ();
+ step st {m with e = c} w
+ | c, _, B.Void ->
+ assert false
+ | c, a, (B.Abst _ as b) ->
+ let e = Y.apix C.err C.start a in
+ {m with e = c}, Some (e, a, b), x
+ end
+ | B.Cast (_, _, t) ->
+ P.add ~tau:1 ();
+ step st m t
+ | B.Appl (_, v, t) ->
+ step st {m with s = (m.e, v) :: m.s} t
+ | B.Bind (a, B.Abst w, t) ->
+ begin match m.s with
+ | [] -> m, None, x
+ | (c, v) :: s ->
+ P.add ~beta:1 ~upsilon:(List.length s) ();
+ let e = B.push m.e c a (B.abbr v) (* (B.Cast ([], w, v)) *) in
+ step st {m with e = e; s = s} t
end
- | B.Cast (_, t) -> whd f c t
+ | B.Bind (a, b, t) ->
+ P.add ~upsilon:(List.length m.s) ();
+ let e = B.push m.e m.e a b in
+ step st {m with e = e} t
+
+let push m a b =
+ assert (m.s = []);
+ let a, i = match b with
+ | B.Abst _ -> Y.Apix m.i :: a, succ m.i
+ | b -> a, m.i
+ in
+ let e = B.push m.e m.e a b in
+ {m with e = e; i = i}
+
+let rec ac_nfs st (m1, r1, u) (m2, r2, t) =
+ log2 "Now converting nfs" m1.e u m2.e t;
+ match r1, u, r2, t with
+ | _, B.Sort (_, h1), _, B.Sort (_, h2) ->
+ h1 = h2
+ | Some (e1, _, B.Abst _), _, Some (e2, _, B.Abst _), _ ->
+ if e1 = e2 then ac_stacks st m1 m2 else false
+ | Some (e1, _, B.Abbr v1), _, Some (e2, _, B.Abbr v2), _ ->
+ if e1 = e2 then
+ if ac_stacks st m1 m2 then true else begin
+ P.add ~gdelta:2 (); ac st m1 v1 m2 v2
+ end
+ else if e1 < e2 then begin
+ P.add ~gdelta:1 ();
+ ac_nfs st (m1, r1, u) (step st m2 v2)
+ end else begin
+ P.add ~gdelta:1 ();
+ ac_nfs st (step st m1 v1) (m2, r2, t)
+ end
+ | _, _, Some (_, _, B.Abbr v2), _ ->
+ P.add ~gdelta:1 ();
+ ac_nfs st (m1, r1, u) (step st m2 v2)
+ | Some (_, _, B.Abbr v1), _, _, _ ->
+ P.add ~gdelta:1 ();
+ ac_nfs st (step st m1 v1) (m2, r2, t)
+ | _, B.Bind (a1, (B.Abst w1 as b1), t1),
+ _, B.Bind (a2, (B.Abst w2 as b2), t2) ->
+ if ac {st with Y.si = false} m1 w1 m2 w2 then
+ ac st (push m1 a1 b1) t1 (push m2 a2 b2) t2
+ else false
+ | _, B.Sort _, _, B.Bind (a, b, t) when st.Y.si ->
+ P.add ~si:1 ();
+ ac st (push m1 a b) u (push m2 a b) t
+ | _ -> false
+
+and ac st m1 t1 m2 t2 =
+(* L.warn "entering R.are_convertible"; *)
+ ac_nfs st (step st m1 t1) (step st m2 t2)
+
+and ac_stacks st m1 m2 =
+(* L.warn "entering R.are_convertible_stacks"; *)
+(* if List.length m1.s <> List.length m2.s then false else *)
+ let map (c1, v1) (c2, v2) =
+ let m1, m2 = {m1 with e = c1; s = []}, {m2 with e = c2; s = []} in
+ ac {st with Y.si = false} m1 v1 m2 v2
+ in
+ list_and map (m1.s, m2.s)
(* Interface functions ******************************************************)
-let push f c b t =
- assert (fst c.l = 0 && c.s = []);
- let f g = f {c with g = g} in
- push_e f b t c.g
+let empty_kam = {
+ e = B.empty; s = []; i = 0
+}
+
+let get m i =
+ assert (m.s = []);
+ let _, _, _, b = B.get m.e i in b
+
+let xwhd st m t =
+ L.box level; log1 "Now scanning" m.e t;
+ let m, _, t = step {st with Y.delta = true; Y.rt = true} m t in
+ L.unbox level; m, t
+
+let are_convertible st mu u mw w =
+ L.box level; log2 "Now converting" mu.e u mw.e w;
+ let r = ac {st with Y.delta = false; Y.rt = false} mu u mw w in
+ L.unbox level; r
+(* let err _ = in
+ if S.eq mu mw then are_alpha_convertible err f u w else err () *)
+
+(* error reporting **********************************************************)
+
+let pp_term m frm t = O.specs.L.pp_term m.e frm t
+
+let pp_lenv frm m = O.specs.L.pp_lenv frm m.e
+
+let specs = {
+ L.pp_term = pp_term; L.pp_lenv = pp_lenv
+}
projects / helm.git / blobdiff