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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
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