Stuff moved from old Matita.

[helm.git] / matita / components / ng_disambiguation / nnumber_notation.ml

diff --git a/matita/components/ng_disambiguation/nnumber_notation.ml b/matita/components/ng_disambiguation/nnumber_notation.ml
new file mode 100644 (file)
index 0000000..8eaa705
--- /dev/null
+++ b/matita/components/ng_disambiguation/nnumber_notation.ml
@@ -0,0 +1,58 @@
+(* Copyright (C) 2004, 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: number_notation.ml 9771 2009-05-14 13:43:55Z fguidi $ *)
+
+let error msg =
+   raise (DisambiguateTypes.Invalid_choice (lazy (Stdpp.dummy_loc, msg)))
+
+let build_nat o s str =
+   let n = int_of_string str in
+   if n < 0 then error (str ^ " is not a valid natural number number") else
+   let rec aux n = if n = 0 then o () else s (aux (pred n)) in
+   aux n
+
+let ninterp_natural_number num =
+  (*
+   let nat_URI = match Obj.nat_URI () with
+      | Some uri -> uri
+      | None     -> error "no default natural numbers"
+   in
+  *)
+   let nat_URI = NUri.uri_of_string "cic:/matita/ng/arithmetics/nat/nat.ind" in
+   let o () =
+    NCic.Const
+     (NReference.reference_of_spec nat_URI (NReference.Con (0,1,0))) in
+   let s t =
+    NCic.Appl
+     [NCic.Const
+      (NReference.reference_of_spec nat_URI (NReference.Con (0,2,0)));
+      t] in
+   build_nat o s num
+
+let _ =
+  DisambiguateChoices.nadd_num_choice
+    ("nnatural number", `Num_interp ninterp_natural_number);
+;;