1 (* Copyright (C) 2004, 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://helm.cs.unibo.it/
26 type location = int * int
28 type direction = [ `Left | `Right ]
29 type reduction_kind = [ `Reduce | `Simpl | `Whd ]
30 type 'term pattern = Pattern of 'term
32 (* when an 'ident option is None, the default is to apply the tactic
33 to the current goal *)
35 type ('term, 'ident) tactic =
36 | LocatedTactic of location * ('term, 'ident) tactic
41 | Change of 'term * 'term * 'ident option (* what, with what, where *)
42 | Change_pattern of 'term pattern * 'term * 'ident option
43 (* what, with what, where *)
46 | Decompose of 'ident * 'ident list (* where, which principles *)
47 | Discriminate of 'ident
48 | Elim of 'term * 'term option (* what to elim, which principle to use *)
52 | Fold of reduction_kind * 'term
55 | Intros of int option * 'ident list
57 | LetIn of 'term * 'ident
58 (* | Named_intros of 'ident list (* joined with Intros above *) *)
59 | Reduce of reduction_kind * 'term pattern * 'ident option (* what, where *)
61 | Replace of 'term * 'term (* what, with what *)
62 | Replace_pattern of 'term pattern * 'term
63 | Rewrite of direction * 'term * 'ident option
68 | Transitivity of 'term
70 type 'tactic tactical =
71 | LocatedTactical of location * 'tactic tactical
74 | Do of int * 'tactic tactical
76 | Repeat of 'tactic tactical
77 | Seq of 'tactic tactical list (* sequential composition *)
79 | Then of 'tactic tactical * 'tactic tactical list
80 | Tries of 'tactic tactical list
81 (* try a sequence of tacticals until one succeeds, fail otherwise *)
82 | Try of 'tactic tactical (* try a tactical and mask failures *)