1 (* Copyright (C) 2005, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://cs.unibo.it/helm/.
27 type 'a path_string_elem =
28 | Constant of 'a * int (* name, arity *)
29 | Bound of int * int (* rel, arity *)
30 | Variable (* arity is 0 *)
31 | Proposition (* arity is 0 *)
32 | Datatype (* arity is 0 *)
33 | Dead (* arity is 0 *)
36 type 'a path = ('a path_string_elem) list;;
38 module type Indexable = sig
42 constant_name path_string_elem ->
43 constant_name path_string_elem -> int
44 val string_of_path : constant_name path -> string
45 val path_string_of : input -> constant_name path
48 module type DiscriminationTree =
57 val iter : t -> (constant_name path -> dataset -> unit) -> unit
60 val index : t -> input -> data -> t
61 val remove_index : t -> input -> data -> t
62 val in_index : t -> input -> (data -> bool) -> bool
63 val retrieve_generalizations : t -> input -> dataset
64 val retrieve_unifiables : t -> input -> dataset
68 module Make (I : Indexable) (A : Set.S) : DiscriminationTree
69 with type constant_name = I.constant_name and type input = I.input
70 and type data = A.elt and type dataset = A.t