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51 lines
1.2 KiB
51 lines
1.2 KiB
#ifndef _BooleanLexer_h_
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#define _BooleanLexer_h_
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//
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// BooleanLexer.h
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//
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// BooleanLexer: lexical analyzer for boolean query expressions.
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// defines terminal symbols
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// "word", and, or, not, near, (, ), /
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//
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// Part of the ht://Dig package <http://www.htdig.org/>
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// Copyright (c) 1995-2004 The ht://Dig Group
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// For copyright details, see the file COPYING in your distribution
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// or the GNU Library General Public License (LGPL) version 2 or later
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// <http://www.gnu.org/copyleft/lgpl.html>
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//
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// $Id: BooleanLexer.h,v 1.4 2004/05/28 13:15:24 lha Exp $
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//
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#include "QueryLexer.h"
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class BooleanLexer : public QueryLexer
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{
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public:
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// is the current token a word?
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bool IsWord() const;
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// is the current token the 'and' keyword?
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bool IsAnd() const;
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// is the current token the 'or' keyword?
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bool IsOr() const;
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// is the current token the 'near' keyword?
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bool IsNear() const;
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// is the current token the 'not' keyword?
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bool IsNot() const;
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// is the current token the '(' sign?
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bool IsLeftParen() const;
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// is the current token the ')' sign?
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bool IsRightParen() const;
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// is the current token the '/' sign?
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bool IsSlash() const;
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};
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#endif
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