-(* 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 x = x
+(*
+ ||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_______________________________________________________________ *)
+
+let start x = x
+
+let id f x = f x
let rec list_sub_strict f l1 l2 = match l1, l2 with
| _, [] -> f l1
let f hd = list_rev_map_append f map ~tail:(hd :: tail) tl in
map f hd
+let rec list_forall2 f map l1 l2 = match l1, l2 with
+ | [], [] -> f true
+ | hd1 :: tl1, hd2 :: tl2 ->
+ let f b = if b then list_forall2 f map tl1 tl2 else f false in
+ map f hd1 hd2
+ | _ -> f false
+
let list_rev_append f =
list_rev_map_append f (fun f t -> f t)
let list_rev =
list_rev_append ~tail:[]
+let list_fold_right f map l a =
+ let map f a m = map f m a in
+ list_rev (list_fold_left f map a) l
+
let list_map f =
list_rev_map (list_rev f)
+let list_iter f map l =
+ let map f () x = map f x in
+ list_fold_left f map () l
+
+let rec list_fold_left2 f map a l1 l2 = match l1, l2 with
+ | [], [] -> f a
+ | hd1 :: tl1, hd2 :: tl2 ->
+ let f a = if a = None then f a else list_fold_left2 f map a tl1 tl2 in
+ map f a hd1 hd2
+ | _ -> f None