+++ /dev/null
-(*
- ||M|| This file is part of HELM, an Hypertextual, Electronic
- ||A|| Library of Mathematics, developed at the Computer Science
- ||T|| Department, University of Bologna, Italy.
- ||I||
- ||T|| HELM is free software; you can redistribute it and/or
- ||A|| modify it under the terms of the GNU General Public License
- \ / version 2 or (at your option) any later version.
- \ / This software is distributed as is, NO WARRANTY.
- V_______________________________________________________________ *)
-
-module B = Brg
-(* module O = Output *)
-
-let rec icm a = function
- | B.Sort _
- | B.LRef _
- | B.GRef _ -> succ a
- | B.Bind (_, B.Void, t) -> icm (succ a) t
- | B.Cast (_, u, t) -> icm (icm a u) t
- | B.Appl (_, u, t)
- | B.Bind (_, B.Abst u, t)
- | B.Bind (_, B.Abbr u, t) -> icm (icm (succ a) u) t
-
-let iter map d =
- let rec iter_bind d = function
- | B.Void -> B.Void
- | B.Abst w -> B.Abst (iter_term d w)
- | B.Abbr v -> B.Abbr (iter_term d v)
- and iter_term d = function
- | B.Sort _ as t -> t
- | B.GRef _ as t -> t
- | B.LRef (a, i) as t -> if i < d then t else map d a i
- | B.Cast (a, w, v) -> B.Cast (a, iter_term d w, iter_term d v)
- | B.Appl (a, w, u) -> B.Appl (a, iter_term d w, iter_term d u)
- | B.Bind (a, b, u) -> B.Bind (a, iter_bind d b, iter_term (succ d) u)
- in
- iter_term d
-
-let lift_map h _ a i =
- if i + h >= 0 then B.LRef (a, i + h) else assert false
-
-let lift h d t =
- if h = 0 then t else begin
-(* O.icm := succ (* icm *) !O.icm (*t*); *) iter (lift_map h) d t
- end