/****************************************************************************+ −
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).+ −
** All rights reserved.+ −
** Contact: Nokia Corporation (qt-info@nokia.com)+ −
**+ −
** This file is part of the QtXmlPatterns module of the Qt Toolkit.+ −
**+ −
** $QT_BEGIN_LICENSE:LGPL$+ −
** No Commercial Usage+ −
** This file contains pre-release code and may not be distributed.+ −
** You may use this file in accordance with the terms and conditions+ −
** contained in the Technology Preview License Agreement accompanying+ −
** this package.+ −
**+ −
** GNU Lesser General Public License Usage+ −
** Alternatively, this file may be used under the terms of the GNU Lesser+ −
** General Public License version 2.1 as published by the Free Software+ −
** Foundation and appearing in the file LICENSE.LGPL included in the+ −
** packaging of this file. Please review the following information to+ −
** ensure the GNU Lesser General Public License version 2.1 requirements+ −
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+ −
**+ −
** In addition, as a special exception, Nokia gives you certain additional+ −
** rights. These rights are described in the Nokia Qt LGPL Exception+ −
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+ −
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** If you have questions regarding the use of this file, please contact+ −
** Nokia at qt-info@nokia.com.+ −
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** $QT_END_LICENSE$+ −
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+ −
//+ −
// W A R N I N G+ −
// -------------+ −
//+ −
// This file is not part of the Qt API. It exists purely as an+ −
// implementation detail. This header file may change from version to+ −
// version without notice, or even be removed.+ −
//+ −
// We mean it.+ −
+ −
#ifndef Patternist_RangeExpression_H+ −
#define Patternist_RangeExpression_H+ −
+ −
#include "qpaircontainer_p.h"+ −
+ −
QT_BEGIN_HEADER+ −
+ −
QT_BEGIN_NAMESPACE+ −
+ −
namespace QPatternist+ −
{+ −
+ −
/**+ −
* @short Implements XPath 2.0's @c to expression.+ −
*+ −
* Despite its name, RangeExpression is not related to RangeVariableDeclaration.+ −
*+ −
* @see <a href="http://www.w3.org/TR/xpath20/#construct_seq">XML Path Language+ −
* (XPath) 2.0, 3.3.1 Constructing Sequences</a>+ −
* @see RangeIterator+ −
* @author Frans Englich <frans.englich@nokia.com>+ −
* @ingroup Patternist_expressions+ −
*/+ −
class RangeExpression : public PairContainer+ −
{+ −
public:+ −
RangeExpression(const Expression::Ptr &operand1, const Expression::Ptr &operand2);+ −
+ −
virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &) const;+ −
/**+ −
* It's likely that this function gets called if staticType() inferred+ −
* the cardinality to an exact number. In that case, we know that the+ −
* first arguments is the same as the second argument.+ −
*/+ −
virtual Item evaluateSingleton(const DynamicContext::Ptr &) const;+ −
+ −
virtual SequenceType::List expectedOperandTypes() const;+ −
+ −
/**+ −
* @returns always CommonSequenceTypes::ZeroOrMoreIntegers+ −
*/+ −
virtual SequenceType::Ptr staticType() const;+ −
+ −
/**+ −
* Disables compression for optimization reasons. For example, the+ −
* expression "1 to 1000" would consume thousand allocated instances+ −
* of Integer, and RangeIterator is well suited for dynamic evaluation.+ −
*+ −
* @returns Expression::DisableElimination+ −
*/+ −
virtual Expression::Properties properties() const;+ −
+ −
virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;+ −
};+ −
}+ −
+ −
QT_END_NAMESPACE+ −
+ −
QT_END_HEADER+ −
+ −
#endif+ −