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diff --git a/matita/components/content_pres/cicNotationLexer.mli b/matita/components/content_pres/cicNotationLexer.mli
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+(* 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/
+ *)
+
+  (** begin of error offset (counted in unicode codepoint)
+   * end of error offset (counted as above)
+   * error message *)
+exception Error of int * int * string
+
+  (** XXX ZACK DEFCON 4 BEGIN: never use the tok_func field of the glexers below
+   * passing values of type char Stream.t, they should be in fact Ulexing.lexbuf
+   * casted with Obj.magic :-/ Read the comment in the .ml for the rationale *)
+
+val level1_pattern_lexer: unit -> (string * string) Token.glexer
+val level2_ast_lexer: unit -> (string * string) Token.glexer
+val level2_meta_lexer: unit -> (string * string) Token.glexer
+
+  (** XXX ZACK DEFCON 4 END *)
+
+val add_level2_ast_keyword: string -> unit    (** non idempotent *)
+val remove_level2_ast_keyword: string -> unit (** non idempotent *)
+
+(** {2 Ligatures} *)
+
+val push: unit -> unit
+val pop: unit -> unit