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 exception CannotSubstInMeta;;
27 exception RelToHiddenHypothesis;;
28 exception ReferenceToVariable;;
29 exception ReferenceToConstant;;
30 exception ReferenceToInductiveDefinition;;
33 (* lifts [t] of [n] *)
34 (* NOTE: the opposite function (delift_rels) is defined in CicMetaSubst *)
35 (* since it needs to restrict the metavariables in case of failure *)
36 val lift : int -> Cic.term -> Cic.term
39 (* as lift but lifts only indexes >= from *)
40 val lift_from: int -> int -> Cic.term -> Cic.term
43 (* as lift_from but lifts indexes by applying a map to them
44 the first argument of the map is the current depth *)
45 (* FG: this is used in CicDischarge to perform non-linear relocation *)
46 val lift_map: int -> (int -> int -> int) -> Cic.term -> Cic.term
49 (* substitutes [t1] for [Rel 1] in [t2] *)
50 (* if avoid_beta_redexes is true (default: false) no new beta redexes *)
51 (* are generated. WARNING: the substitution can diverge when t2 is not *)
52 (* well typed and avoid_beta_redexes is true. *)
53 val subst : ?avoid_beta_redexes:bool -> Cic.term -> Cic.term -> Cic.term
55 (* subst_vars exp_named_subst t2 *)
56 (* applies [exp_named_subst] to [t2] *)
58 Cic.term Cic.explicit_named_substitution -> Cic.term -> Cic.term
60 (* subst_meta [t_1 ; ... ; t_n] t *)
61 (* returns the term [t] where [Rel i] is substituted with [t_i] *)
62 (* [t_i] is lifted as usual when it crosses an abstraction *)
63 val subst_meta : (Cic.term option) list -> Cic.term -> Cic.term