(* Copyright (C) 2000-2002, HELM Team.
 * 
 * This file is part of HELM, an Hypertextual, Electronic
 * Library of Mathematics, developed at the Computer Science
 * Department, University of Bologna, Italy.
 * 
 * HELM is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * HELM is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HELM; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA  02111-1307, USA.
 * 
 * For details, see the HELM World-Wide-Web page,
 * http://cs.unibo.it/helm/.
 *)

exception Bad_pattern of string

(* Returns the first meta whose number is above the *)
(* number of the higher meta.                       *)
val new_meta_of_proof : proof:ProofEngineTypes.proof -> int

val subst_meta_in_proof :
  ProofEngineTypes.proof ->
  int -> Cic.term -> Cic.metasenv ->
  ProofEngineTypes.proof * Cic.metasenv
val subst_meta_and_metasenv_in_proof :
  ProofEngineTypes.proof ->
  int -> (Cic.term -> Cic.term) -> Cic.metasenv ->
  ProofEngineTypes.proof * Cic.metasenv

(* returns the list of goals that are in newmetasenv and were not in
   oldmetasenv *)
val compare_metasenvs :
  oldmetasenv:Cic.metasenv -> newmetasenv:Cic.metasenv -> int list


(** { Patterns }
 * A pattern is a Cic term in which Cic.Implicit terms annotated with `Hole
 * appears *)

(** create a pattern from a term and a list of subterm.
* @param equality equality function used while walking the term. Defaults to
* physical equality (==) *)
val pattern_of:
  ?equality:(Cic.term -> Cic.term -> bool) -> term:Cic.term -> Cic.term list ->
    Cic.term

(** select context term (what,where)
* select all subterms of [term] matching [what] in positions rooted at the holes
* of the pattern [where]. [context] is the context of [term]. It returns
* the list of the matched terms (that can be compared using physical equality)
* together with their contexts. *)
val select:
 context:Cic.context -> term:Cic.term -> pattern:(Cic.term option * Cic.term) ->
  (Cic.context * Cic.term) list