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#ifndef _BooleanLexer_h_
#define _BooleanLexer_h_
//
// BooleanLexer.h
//
// BooleanLexer: lexical analyzer for boolean query expressions.
// defines terminal symbols
// "word", and, or, not, near, (, ), /
//
// 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: BooleanLexer.h,v 1.4 2004/05/28 13:15:24 lha Exp $
//
#include "QueryLexer.h"
class BooleanLexer : public QueryLexer
{
public:
// is the current token a word?
bool IsWord() const;
// is the current token the 'and' keyword?
bool IsAnd() const;
// is the current token the 'or' keyword?
bool IsOr() const;
// is the current token the 'near' keyword?
bool IsNear() const;
// is the current token the 'not' keyword?
bool IsNot() const;
// is the current token the '(' sign?
bool IsLeftParen() const;
// is the current token the ')' sign?
bool IsRightParen() const;
// is the current token the '/' sign?
bool IsSlash() const;
};
#endif
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