--- /dev/null
+(* Copyright (C) 2005, HELM Team.
+ *
+ * This file is part of HELM, an Hypertextual, Electronic
+ * Library of Mathematics, developed at the Computer Science
+ * Department, University of Bologna, Italy.
+ *
+ * HELM is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * HELM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with HELM; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ *
+ * For details, see the HELM World-Wide-Web page,
+ * http://helm.cs.unibo.it/
+ *)
+
+(* $Id$ *)
+
+(**** TABLES ****)
+
+let default_eq_URIs = []
+let default_true_URIs = []
+let default_false_URIs = []
+let default_absurd_URIs = []
+
+(* eq, sym_eq, trans_eq, eq_ind, eq_ind_R *)
+let eq_URIs_ref = ref default_eq_URIs;;
+
+let true_URIs_ref = ref default_true_URIs
+let false_URIs_ref = ref default_false_URIs
+let absurd_URIs_ref = ref default_absurd_URIs
+
+
+(**** SET_DEFAULT ****)
+
+exception NotRecognized of string;;
+
+(* insert an element in front of the list, removing from the list all the
+ previous elements with the same key associated *)
+let insert_unique e extract l =
+ let uri = extract e in
+ let l' =
+ List.filter (fun x -> let uri' = extract x in not (UriManager.eq uri uri')) l
+ in
+ e :: l'
+
+let set_default what l =
+ match what,l with
+ "equality",[eq_URI;sym_eq_URI;trans_eq_URI;eq_ind_URI;
+ eq_ind_r_URI;eq_rec_URI;eq_rec_r_URI;eq_rect_URI;
+ eq_rect_r_URI;eq_f_URI;eq_f_sym_URI] ->
+ eq_URIs_ref :=
+ insert_unique
+ (eq_URI,sym_eq_URI,trans_eq_URI,eq_ind_URI,
+ eq_ind_r_URI,eq_rec_URI,eq_rec_r_URI,eq_rect_URI,
+ eq_rect_r_URI,eq_f_URI,eq_f_sym_URI)
+ (fun x,_,_,_,_,_,_,_,_,_,_ -> x) !eq_URIs_ref
+ | "true",[true_URI] ->
+ true_URIs_ref := insert_unique true_URI (fun x -> x) !true_URIs_ref
+ | "false",[false_URI] ->
+ false_URIs_ref := insert_unique false_URI (fun x -> x) !false_URIs_ref
+ | "absurd",[absurd_URI] ->
+ absurd_URIs_ref := insert_unique absurd_URI (fun x -> x) !absurd_URIs_ref
+ | _,l ->
+ raise
+ (NotRecognized (what^" with "^string_of_int(List.length l)^" params"))
+;;
+
+let reset_defaults () =
+ eq_URIs_ref := default_eq_URIs;
+ true_URIs_ref := default_true_URIs;
+ false_URIs_ref := default_false_URIs;
+ absurd_URIs_ref := default_absurd_URIs
+;;
+
+let stack = ref [];;
+
+let push () =
+ stack := (!eq_URIs_ref, !true_URIs_ref, !false_URIs_ref, !absurd_URIs_ref)::!stack;
+ reset_defaults ()
+;;
+
+let pop () =
+ match !stack with
+ | [] -> raise (Failure "Unable to POP in libraryObjects.ml")
+ | (eq,t,f,a)::tl ->
+ stack := tl;
+ eq_URIs_ref := eq;
+ true_URIs_ref := t;
+ false_URIs_ref := f;
+ absurd_URIs_ref := a
+;;
+
+(**** LOOKUP FUNCTIONS ****)
+let eq_URI () =
+ try let eq,_,_,_,_,_,_,_,_,_,_ = List.hd !eq_URIs_ref in Some eq
+ with Failure "hd" -> None
+
+let is_eq_URI uri =
+ List.exists (fun (eq,_,_,_,_,_,_,_,_,_,_) -> UriManager.eq eq uri) !eq_URIs_ref
+
+let is_eq_refl_URI uri =
+ let urieq = UriManager.strip_xpointer uri in
+ is_eq_URI urieq &&
+ not (UriManager.eq urieq uri)
+;;
+
+let is_eq_ind_URI uri =
+ List.exists (fun (_,_,_,eq_ind,_,_,_,_,_,_,_) -> UriManager.eq eq_ind uri) !eq_URIs_ref
+let is_eq_ind_r_URI uri =
+ List.exists (fun (_,_,_,_,eq_ind_r,_,_,_,_,_,_) -> UriManager.eq eq_ind_r uri) !eq_URIs_ref
+let is_eq_rec_URI uri =
+ List.exists (fun (_,_,_,_,_,eq_rec,_,_,_,_,_) -> UriManager.eq eq_rec uri) !eq_URIs_ref
+let is_eq_rec_r_URI uri =
+ List.exists (fun (_,_,_,_,_,_,eq_rec_r,_,_,_,_) -> UriManager.eq eq_rec_r uri) !eq_URIs_ref
+let is_eq_rect_URI uri =
+ List.exists (fun (_,_,_,_,_,_,_,eq_rect,_,_,_) -> UriManager.eq eq_rect uri) !eq_URIs_ref
+let is_eq_rect_r_URI uri =
+ List.exists (fun (_,_,_,_,_,_,_,_,eq_rect_r,_,_) -> UriManager.eq eq_rect_r uri) !eq_URIs_ref
+let is_trans_eq_URI uri =
+ List.exists (fun (_,_,trans_eq,_,_,_,_,_,_,_,_) -> UriManager.eq trans_eq uri) !eq_URIs_ref
+let is_sym_eq_URI uri =
+ List.exists (fun (_,sym_eq,_,_,_,_,_,_,_,_,_) -> UriManager.eq sym_eq uri) !eq_URIs_ref
+let is_eq_f_URI uri =
+ List.exists (fun (_,_,_,_,_,_,_,_,_,eq_f,_) -> UriManager.eq eq_f uri) !eq_URIs_ref
+let is_eq_f_sym_URI uri =
+ List.exists (fun (_,_,_,_,_,_,_,_,_,_,eq_f1) -> UriManager.eq eq_f1 uri) !eq_URIs_ref
+
+let in_eq_URIs uri =
+ is_eq_URI uri || is_eq_refl_URI uri || is_eq_ind_URI uri ||
+ is_eq_ind_r_URI uri || is_eq_rec_URI uri || is_eq_rec_r_URI uri ||
+ is_eq_rect_URI uri || is_eq_rect_r_URI uri ||
+ is_trans_eq_URI uri || is_sym_eq_URI uri || is_eq_f_URI uri ||
+ is_eq_f_sym_URI uri
+
+
+
+let eq_refl_URI ~eq:uri =
+ let uri = UriManager.strip_xpointer uri in
+ UriManager.uri_of_string (UriManager.string_of_uri uri ^ "#xpointer(1/1/1)")
+
+let sym_eq_URI ~eq:uri =
+ try
+ let _,x,_,_,_,_,_,_,_,_,_ = List.find (fun eq,_,_,_,_,_,_,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
+ with Not_found -> raise (NotRecognized (UriManager.string_of_uri uri))
+
+let trans_eq_URI ~eq:uri =
+ try
+ let _,_,x,_,_,_,_,_,_,_,_ = List.find (fun eq,_,_,_,_,_,_,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
+ with Not_found -> raise (NotRecognized (UriManager.string_of_uri uri))
+
+let eq_ind_URI ~eq:uri =
+ try
+ let _,_,_,x,_,_,_,_,_,_,_ = List.find (fun eq,_,_,_,_,_,_,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
+ with Not_found -> raise (NotRecognized (UriManager.string_of_uri uri))
+
+let eq_ind_r_URI ~eq:uri =
+ try
+ let _,_,_,_,x,_,_,_,_,_,_ = List.find (fun eq,_,_,_,_,_,_,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
+ with Not_found -> raise (NotRecognized (UriManager.string_of_uri uri))
+
+let eq_rec_URI ~eq:uri =
+ try
+ let _,_,_,_,_,x,_,_,_,_,_ = List.find (fun eq,_,_,_,_,_,_,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
+ with Not_found -> raise (NotRecognized (UriManager.string_of_uri uri))
+
+let eq_rec_r_URI ~eq:uri =
+ try
+ let _,_,_,_,_,_,x,_,_,_,_ = List.find (fun eq,_,_,_,_,_,_,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
+ with Not_found -> raise (NotRecognized (UriManager.string_of_uri uri))
+
+let eq_rect_URI ~eq:uri =
+ try
+ let _,_,_,_,_,_,_,x,_,_,_ = List.find (fun eq,_,_,_,_,_,_,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
+ with Not_found -> raise (NotRecognized (UriManager.string_of_uri uri))
+
+let eq_rect_r_URI ~eq:uri =
+ try
+ let _,_,_,_,_,_,_,_,x,_,_ = List.find (fun eq,_,_,_,_,_,_,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
+ with Not_found -> raise (NotRecognized (UriManager.string_of_uri uri))
+
+let eq_f_URI ~eq:uri =
+ try
+ let _,_,_,_,_,_,_,_,_,x,_ = List.find (fun eq,_,_,_,_,_,_,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
+ with Not_found -> raise (NotRecognized (UriManager.string_of_uri uri))
+
+let eq_f_sym_URI ~eq:uri =
+ try
+ let _,_,_,_,_,_,_,_,_,_,x = List.find (fun eq,_,_,_,_,_,_,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
+ with Not_found -> raise (NotRecognized (UriManager.string_of_uri uri))
+
+
+let eq_URI_of_eq_f_URI eq_f_URI =
+ try
+ let x,_,_,_,_,_,_,_,_,_,_ =
+ List.find (fun _,_,_,_,_,_,_,_,_,u,_ -> UriManager.eq eq_f_URI u) !eq_URIs_ref
+ in x
+ with Not_found -> raise (NotRecognized (UriManager.string_of_uri eq_f_URI))
+
+let true_URI () =
+ try Some (List.hd !true_URIs_ref) with Failure "hd" -> None
+let false_URI () =
+ try Some (List.hd !false_URIs_ref) with Failure "hd" -> None
+let absurd_URI () =
+ try Some (List.hd !absurd_URIs_ref) with Failure "hd" -> None
+
+let nat_URI = UriManager.uri_of_string "cic:/matita/nat/nat/nat.ind"
+
+let zero = Cic.MutConstruct (nat_URI,0,1,[])
+let succ = Cic.MutConstruct (nat_URI,0,2,[])
+
+let is_zero = function
+ | Cic.AMutConstruct (_, uri, 0, 1, _) when UriManager.eq uri nat_URI -> true
+ | _ -> false
+
+let is_succ = function
+ | Cic.AMutConstruct (_, uri, 0, 2, _) when UriManager.eq uri nat_URI -> true
+ | _ -> false
+
+let build_nat n =
+ if n < 0 then assert false;
+ let rec aux = function
+ | 0 -> zero
+ | n -> Cic.Appl [ succ; (aux (n - 1)) ]
+ in
+ aux n
+
+let destroy_nat annterm =
+ let rec aux acc = function
+ | Cic.AAppl (_, [he ; tl]) when is_succ he -> aux (acc + 1) tl
+ | t when is_zero t -> Some acc
+ | _ -> None in
+ aux 0 annterm
+
projects / helm.git / blobdiff