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43 lines
934 B
43 lines
934 B
3 years ago
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#ifndef _NotQuery_h_
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#define _NotQuery_h_
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//
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// NotQuery.h
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//
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// NotQuery: 'not' query operator (n-ary not!)
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// i.e. not(a, b, c, d...) == a except (b or c or d or...)
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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: NotQuery.h,v 1.4 2004/05/28 13:15:24 lha Exp $
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//
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#ifdef HAVE_CONFIG_H
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#include "htconfig.h"
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#endif
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#include "OperatorQuery.h"
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//
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//
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class NotQuery : public OperatorQuery
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{
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public:
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private:
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// evaluate operands and operate
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ResultList *Evaluate();
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// create a difference of the operand results
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ResultList *Subtract(const ResultList &, const List &);
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// used by GetLogicalWords
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String OperatorString() const { return String("not"); }
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};
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#endif
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