+++ /dev/null
-(* 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.
- *
- * 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 UnificationFailed
-exception Free
-exception OccurCheck
-
-val delift :
- Cic.context -> Cic.metasenv -> (Cic.term option) list -> Cic.term -> Cic.term * Cic.metasenv
-
-(* The entry (i,t) in a substitution means that *)
-(* (META i) have been instantiated with t. *)
-type substitution = (int * Cic.term) list
-
-(* fo_unif metasenv context t1 t2 *)
-(* unifies [t1] and [t2] in a context [context]. *)
-(* Only the metavariables declared in [metasenv] *)
-(* can be used in [t1] and [t2]. *)
-val fo_unif :
- Cic.metasenv -> Cic.context -> Cic.term -> Cic.term ->
- substitution * Cic.metasenv
-
-(* apply_subst subst t *)
-(* applies the substitution [sust] to [t] *)
-val apply_subst : substitution -> Cic.term -> Cic.term
-
-(* apply_subst_reducing subst (Some (mtr,reductions_no)) t *)
-(* performs as (apply_subst subst t) until it finds an application of *)
-(* (META [mtr]) that, once unwinding is performed, creates a new *)
-(* beta-redex; in this case up to [reductions_no] consecutive *)
-(* beta-reductions are performed. *)
-(* Hint: this function is usually called when [reductions_no] *)
-(* eta-expansions have been performed and the head of the new *)
-(* application has been unified with (META [meta_to_reduce]): *)
-(* during the unwinding the eta-expansions are undone. *)
-val apply_subst_reducing :
- substitution -> (int * int) option -> Cic.term -> Cic.term