1 (* Copyright (C) 2000, 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/.
26 (* This module implements the Query interface to the Coercion Graph *)
28 type coercion_search_result =
29 | SomeCoercion of Cic.term
32 | NotHandled of string Lazy.t
34 val look_for_coercion :
35 Cic.term -> Cic.term -> coercion_search_result
37 val is_a_coercion: Cic.term -> bool
38 val source_of: Cic.term -> Cic.term
39 val target_of: Cic.term -> Cic.term
41 val generate_dot_file: unit -> string