/**************************************************************************** | |
** | |
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
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** Contact: Nokia Corporation (qt-info@nokia.com) | |
** | |
** This file is part of the QtXmlPatterns module of the Qt Toolkit. | |
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** $QT_BEGIN_LICENSE:LGPL$ | |
** GNU Lesser General Public License Usage | |
** 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 | |
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** file. Please review the following information to ensure the GNU Lesser | |
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** 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. | |
** | |
** GNU General Public License Usage | |
** Alternatively, this file may be used under the terms of the GNU General | |
** Public License version 3.0 as published by the Free Software Foundation | |
** and appearing in the file LICENSE.GPL included in the packaging of this | |
** file. Please review the following information to ensure the GNU General | |
** Public License version 3.0 requirements will be met: | |
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** Other Usage | |
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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_ContextItem_H | |
#define Patternist_ContextItem_H | |
#include "qemptycontainer_p.h" | |
QT_BEGIN_HEADER | |
QT_BEGIN_NAMESPACE | |
namespace QPatternist | |
{ | |
/** | |
* @short Implements the context item, the dot: <tt>.</tt>. | |
* | |
* @see <a href="http://www.w3.org/TR/xpath20/#id-context-item-expression">XML Path Language | |
* (XPath) 2.0, 3.1.4 Context Item Expression</a> | |
* @author Frans Englich <frans.englich@nokia.com> | |
* @ingroup Patternist_expressions | |
*/ | |
class ContextItem : public EmptyContainer | |
{ | |
public: | |
/** | |
* @p expr is possibly used for error reporting. If this context item has been | |
* created implicitly, such as for the expression <tt>fn:string()</tt>, @p expr | |
* should be passed a valid pointer to the Expression that this context | |
* item is generated for. | |
*/ | |
inline ContextItem(const Expression::Ptr &expr = Expression::Ptr()) : m_expr(expr) | |
{ | |
} | |
virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; | |
virtual SequenceType::Ptr staticType() const; | |
/** | |
* @returns always DisableElimination and RequiresContextItem | |
*/ | |
virtual Expression::Properties properties() const; | |
virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const; | |
/** | |
* Overridden to store a pointer to StaticContext::contextItemType(). | |
*/ | |
virtual Expression::Ptr compress(const StaticContext::Ptr &context); | |
/** | |
* Overridden to store a pointer to StaticContext::contextItemType(). | |
*/ | |
virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context, | |
const SequenceType::Ptr &reqType); | |
/** | |
* @returns always IDContextItem | |
*/ | |
virtual ID id() const; | |
/** | |
* @returns always BuiltinTypes::item; | |
*/ | |
virtual ItemType::Ptr expectedContextItemType() const; | |
virtual const SourceLocationReflection *actualReflection() const; | |
virtual void announceFocusType(const ItemType::Ptr &type); | |
private: | |
ItemType::Ptr m_itemType; | |
const Expression::Ptr m_expr; | |
}; | |
} | |
QT_END_NAMESPACE | |
QT_END_HEADER | |
#endif |