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.
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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
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19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://helm.cs.unibo.it/
26 exception Error of string
34 val is_goal_closed: goal -> proof -> bool
35 val goals_of_proof: proof -> goal list
38 tactic -> proof -> goal ->
39 proof * goal list * goal list (** new proof, opened goals, closed goals *)
63 | Tactical of tactical
65 val eval: t -> status -> status
66 val init: proof -> status
68 (** {2 Status accessors} *)
70 val get_proof: status -> proof
71 val set_proof: proof -> status -> status
73 type goal_switch = Open of goal | Closed of goal
74 val get_goals: status -> goal_switch list
76 val is_completed: status -> bool
79 module Make (E:Engine) : C
80 with type goal = E.goal
81 and type proof = E.proof
82 and type tactic = E.tactic