1 (* Copyright (C) 2004-2005, 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://helm.cs.unibo.it/
28 let alias_diff ~from status =
29 let module Map = DisambiguateTypes.Environment in
31 (fun domain_item codomain_item acc ->
32 let description1 = LexiconAst.description_of_alias codomain_item in
35 LexiconAst.description_of_alias
36 (Map.find domain_item from#lstatus.LexiconEngine.aliases)
38 if description1 <> description2 then
39 (domain_item,codomain_item)::acc
44 (domain_item,codomain_item)::acc)
45 status#lstatus.LexiconEngine.aliases []
48 let add_aliases_for_objs status =
51 let references = NCicLibrary.aliases_of nref in
55 let name = NCicPp.r2s true u in
56 DisambiguateTypes.Id name,
57 LexiconAst.Ident_alias (name,NReference.string_of_reference u)
60 LexiconEngine.set_proof_aliases status new_env
65 type t = CicNotation.notation_id
66 let compare = CicNotation.compare_notation_id
69 module IdSet = Set.Make (OrderedId)
71 (** @return l2 \ l1 *)
72 let id_list_diff l2 l1 =
73 let module S = IdSet in
74 let s1 = List.fold_left (fun set uri -> S.add uri set) S.empty l1 in
75 let s2 = List.fold_left (fun set uri -> S.add uri set) S.empty l2 in
76 let diff = S.diff s2 s1 in
77 S.fold (fun uri uris -> uri :: uris) diff []
79 let time_travel ~present ~past =
80 let notation_to_remove =
81 id_list_diff present#lstatus.LexiconEngine.notation_ids
82 past#lstatus.LexiconEngine.notation_ids
84 List.iter CicNotation.remove_notation notation_to_remove
86 let push () = CicNotation.push ();;
87 let pop () = CicNotation.pop ();;