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.
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/
30 let default_eq_URIs = []
31 let default_true_URIs = []
32 let default_false_URIs = []
33 let default_absurd_URIs = []
35 (* eq, sym_eq, trans_eq, eq_ind, eq_ind_R *)
36 let eq_URIs_ref = ref default_eq_URIs;;
38 let true_URIs_ref = ref default_true_URIs
39 let false_URIs_ref = ref default_false_URIs
40 let absurd_URIs_ref = ref default_absurd_URIs
43 (**** SET_DEFAULT ****)
45 exception NotRecognized of string;;
47 (* insert an element in front of the list, removing from the list all the
48 previous elements with the same key associated *)
49 let insert_unique e extract l =
50 let uri = extract e in
52 List.filter (fun x -> let uri' = extract x in not (UriManager.eq uri uri')) l
56 let set_default what l =
58 "equality",[eq_URI;sym_eq_URI;trans_eq_URI;eq_ind_URI;
59 eq_ind_r_URI;eq_rec_URI;eq_rec_r_URI;eq_rect_URI;
60 eq_rect_r_URI;eq_f_URI;eq_f_sym_URI] ->
63 (eq_URI,sym_eq_URI,trans_eq_URI,eq_ind_URI,
64 eq_ind_r_URI,eq_rec_URI,eq_rec_r_URI,eq_rect_URI,
65 eq_rect_r_URI,eq_f_URI,eq_f_sym_URI)
66 (fun x,_,_,_,_,_,_,_,_,_,_ -> x) !eq_URIs_ref
67 | "true",[true_URI] ->
68 true_URIs_ref := insert_unique true_URI (fun x -> x) !true_URIs_ref
69 | "false",[false_URI] ->
70 false_URIs_ref := insert_unique false_URI (fun x -> x) !false_URIs_ref
71 | "absurd",[absurd_URI] ->
72 absurd_URIs_ref := insert_unique absurd_URI (fun x -> x) !absurd_URIs_ref
75 (NotRecognized (what^" with "^string_of_int(List.length l)^" params"))
78 let reset_defaults () =
79 eq_URIs_ref := default_eq_URIs;
80 true_URIs_ref := default_true_URIs;
81 false_URIs_ref := default_false_URIs;
82 absurd_URIs_ref := default_absurd_URIs
85 (**** LOOKUP FUNCTIONS ****)
87 try let eq,_,_,_,_,_,_,_,_,_,_ = List.hd !eq_URIs_ref in Some eq
88 with Failure "hd" -> None
91 List.exists (fun (eq,_,_,_,_,_,_,_,_,_,_) -> UriManager.eq eq uri) !eq_URIs_ref
93 let is_eq_refl_URI uri =
94 let urieq = UriManager.strip_xpointer uri in
96 not (UriManager.eq urieq uri)
99 let is_eq_ind_URI uri =
100 List.exists (fun (_,_,_,eq_ind,_,_,_,_,_,_,_) -> UriManager.eq eq_ind uri) !eq_URIs_ref
101 let is_eq_ind_r_URI uri =
102 List.exists (fun (_,_,_,_,eq_ind_r,_,_,_,_,_,_) -> UriManager.eq eq_ind_r uri) !eq_URIs_ref
103 let is_eq_rec_URI uri =
104 List.exists (fun (_,_,_,_,_,eq_rec,_,_,_,_,_) -> UriManager.eq eq_rec uri) !eq_URIs_ref
105 let is_eq_rec_r_URI uri =
106 List.exists (fun (_,_,_,_,_,_,eq_rec_r,_,_,_,_) -> UriManager.eq eq_rec_r uri) !eq_URIs_ref
107 let is_eq_rect_URI uri =
108 List.exists (fun (_,_,_,_,_,_,_,eq_rect,_,_,_) -> UriManager.eq eq_rect uri) !eq_URIs_ref
109 let is_eq_rect_r_URI uri =
110 List.exists (fun (_,_,_,_,_,_,_,_,eq_rect_r,_,_) -> UriManager.eq eq_rect_r uri) !eq_URIs_ref
111 let is_trans_eq_URI uri =
112 List.exists (fun (_,_,trans_eq,_,_,_,_,_,_,_,_) -> UriManager.eq trans_eq uri) !eq_URIs_ref
113 let is_sym_eq_URI uri =
114 List.exists (fun (_,sym_eq,_,_,_,_,_,_,_,_,_) -> UriManager.eq sym_eq uri) !eq_URIs_ref
115 let is_eq_f_URI uri =
116 List.exists (fun (_,_,_,_,_,_,_,_,_,eq_f,_) -> UriManager.eq eq_f uri) !eq_URIs_ref
117 let is_eq_f_sym_URI uri =
118 List.exists (fun (_,_,_,_,_,_,_,_,_,_,eq_f1) -> UriManager.eq eq_f1 uri) !eq_URIs_ref
121 is_eq_URI uri || is_eq_refl_URI uri || is_eq_ind_URI uri ||
122 is_eq_ind_r_URI uri || is_eq_rec_URI uri || is_eq_rec_r_URI uri ||
123 is_eq_rect_URI uri || is_eq_rect_r_URI uri ||
124 is_trans_eq_URI uri || is_sym_eq_URI uri || is_eq_f_URI uri ||
129 let eq_refl_URI ~eq:uri =
130 let uri = UriManager.strip_xpointer uri in
131 UriManager.uri_of_string (UriManager.string_of_uri uri ^ "#xpointer(1/1/1)")
133 let sym_eq_URI ~eq:uri =
135 let _,x,_,_,_,_,_,_,_,_,_ = List.find (fun eq,_,_,_,_,_,_,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
136 with Not_found -> raise (NotRecognized (UriManager.string_of_uri uri))
138 let trans_eq_URI ~eq:uri =
140 let _,_,x,_,_,_,_,_,_,_,_ = List.find (fun eq,_,_,_,_,_,_,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
141 with Not_found -> raise (NotRecognized (UriManager.string_of_uri uri))
143 let eq_ind_URI ~eq:uri =
145 let _,_,_,x,_,_,_,_,_,_,_ = List.find (fun eq,_,_,_,_,_,_,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
146 with Not_found -> raise (NotRecognized (UriManager.string_of_uri uri))
148 let eq_ind_r_URI ~eq:uri =
150 let _,_,_,_,x,_,_,_,_,_,_ = List.find (fun eq,_,_,_,_,_,_,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
151 with Not_found -> raise (NotRecognized (UriManager.string_of_uri uri))
153 let eq_rec_URI ~eq:uri =
155 let _,_,_,_,_,x,_,_,_,_,_ = List.find (fun eq,_,_,_,_,_,_,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
156 with Not_found -> raise (NotRecognized (UriManager.string_of_uri uri))
158 let eq_rec_r_URI ~eq:uri =
160 let _,_,_,_,_,_,x,_,_,_,_ = List.find (fun eq,_,_,_,_,_,_,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
161 with Not_found -> raise (NotRecognized (UriManager.string_of_uri uri))
163 let eq_rect_URI ~eq:uri =
165 let _,_,_,_,_,_,_,x,_,_,_ = List.find (fun eq,_,_,_,_,_,_,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
166 with Not_found -> raise (NotRecognized (UriManager.string_of_uri uri))
168 let eq_rect_r_URI ~eq:uri =
170 let _,_,_,_,_,_,_,_,x,_,_ = List.find (fun eq,_,_,_,_,_,_,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
171 with Not_found -> raise (NotRecognized (UriManager.string_of_uri uri))
173 let eq_f_URI ~eq:uri =
175 let _,_,_,_,_,_,_,_,_,x,_ = List.find (fun eq,_,_,_,_,_,_,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
176 with Not_found -> raise (NotRecognized (UriManager.string_of_uri uri))
178 let eq_f_sym_URI ~eq:uri =
180 let _,_,_,_,_,_,_,_,_,_,x = List.find (fun eq,_,_,_,_,_,_,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
181 with Not_found -> raise (NotRecognized (UriManager.string_of_uri uri))
184 let eq_URI_of_eq_f_URI eq_f_URI =
186 let x,_,_,_,_,_,_,_,_,_,_ =
187 List.find (fun _,_,_,_,_,_,_,_,_,u,_ -> UriManager.eq eq_f_URI u) !eq_URIs_ref
189 with Not_found -> raise (NotRecognized (UriManager.string_of_uri eq_f_URI))
192 try Some (List.hd !true_URIs_ref) with Failure "hd" -> None
194 try Some (List.hd !false_URIs_ref) with Failure "hd" -> None
196 try Some (List.hd !absurd_URIs_ref) with Failure "hd" -> None
198 let nat_URI = UriManager.uri_of_string "cic:/matita/nat/nat/nat.ind"
200 let zero = Cic.MutConstruct (nat_URI,0,1,[])
201 let succ = Cic.MutConstruct (nat_URI,0,2,[])
203 let is_zero = function
204 | Cic.AMutConstruct (_, uri, 0, 1, _) when UriManager.eq uri nat_URI -> true
207 let is_succ = function
208 | Cic.AMutConstruct (_, uri, 0, 2, _) when UriManager.eq uri nat_URI -> true
212 if n < 0 then assert false;
213 let rec aux = function
215 | n -> Cic.Appl [ succ; (aux (n - 1)) ]
219 let destroy_nat annterm =
220 let rec aux acc = function
221 | Cic.AAppl (_, [he ; tl]) when is_succ he -> aux (acc + 1) tl
222 | t when is_zero t -> Some acc