(* Copyright (C) 2000, HELM Team.
 * 
 * This file is part of HELM, an Hypertextual, Electronic
 * Library of Mathematics, developed at the Computer Science
 * Department, University of Bologna, Italy.
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(* $Id: nCicSubstitution.ml 8135 2008-02-13 15:35:43Z tassi $ *)

exception Subst_not_found of int
exception Meta_not_found of int

val sharing_map: ('a -> 'a) -> 'a list -> 'a list

val expand_local_context : NCic.lc_kind -> NCic.term list

val lookup_subst: int ->  NCic.substitution -> NCic.subst_entry
val lookup_meta: int ->  NCic.metasenv -> NCic.conjecture

(* both functions raise "assert false" when a Meta is found
 * call the 'a->'a function when a binder is crossed *)
val fold:
  (NCic.hypothesis -> 'k -> 'k) -> 'k ->
  ('k -> 'a -> NCic.term -> 'a) -> 'a -> NCic.term -> 'a
val map:
 (NCic.hypothesis -> 'k -> 'k) -> 'k ->
 ('k -> NCic.term -> NCic.term) -> NCic.term -> NCic.term

val is_closed: NCic.term -> bool