-(* 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/.
- *)
-
-let id _ = ()
-
-let rec list_sub_strict f l1 l2 = match l1, l2 with
- | _, [] -> f l1
- | _ :: tl1, _ :: tl2 -> list_sub_strict f tl1 tl2
- | _ -> assert false
-
-let rec list_fold_left f map a = function
- | [] -> f a
- | hd :: tl ->
- let f a = list_fold_left f map a tl in
- map f a hd
-
-let rec list_rev_map_append f map ~tail = function
- | [] -> f tail
- | hd :: tl ->
- let f hd = list_rev_map_append f map ~tail:(hd :: tail) tl in
- map f hd
-
-let list_rev_append f =
- list_rev_map_append f (fun f t -> f t)
-
-let list_rev_map =
- list_rev_map_append ~tail:[]
-
-let list_rev =
- list_rev_append ~tail:[]
-
-let list_map f =
- list_rev_map (list_rev f)
-