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+#ifndef _GParser_h_
+#define _GParser_h_
+
+//
+// GParser.h
+//
+// GParser: An alternate boolean parser, does not use operator precedence.
+// -- but why is it called G? :-)
+//
+// Part of the ht://Dig package <http://www.htdig.org/>
+// Copyright (c) 1995-2004 The ht://Dig Group
+// For copyright details, see the file COPYING in your distribution
+// or the GNU Library General Public License (LGPL) version 2 or later
+// <http://www.gnu.org/copyleft/lgpl.html>
+//
+// $Id: GParser.h,v 1.4 2004/05/28 13:15:24 lha Exp $
+//
+
+#include "QueryParser.h"
+#include "BooleanLexer.h"
+
+class OperatorQuery;
+
+class GParser : public QueryParser
+{
+public:
+ GParser() {}
+ ~GParser() {}
+
+private:
+ // apply the single-level syntax
+ Query *ParseExpression();
+
+ // apply the factor syntax
+ Query *ParseFactor();
+
+ // return the adequate operator for an operator keyword
+ OperatorQuery *MakeOperatorQuery(const String &op) const;
+
+ // give the parent access to the lexical analyzer
+ QueryLexer &Token() { return token; }
+
+ // the lexer
+ BooleanLexer token;
+};
+
+#endif