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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
****************************************************************************/
//
// 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_StackContextBase_H
#define Patternist_StackContextBase_H
#include <QVector>
#include <private/qdaytimeduration_p.h>
#include <private/qdelegatingdynamiccontext_p.h>
#include <private/qexpression_p.h>
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short Base class for all DynamicContext classes that needs to supply
* variables. It has a new frame for local caches, position iterators,
* expressions, range variables, template parameters but notably continues
* to delegate global caches.
*
* @author Frans Englich <frans.englich@nokia.com>
*/
template<typename TSuperClass>
class StackContextBase : public TSuperClass
{
public:
StackContextBase();
/**
* Construct a StackContextBase and passes @p prevContext to its super class. This
* constructor is typically used when the super class is DelegatingDynamicContext.
*/
StackContextBase(const DynamicContext::Ptr &prevContext);
virtual void setRangeVariable(const VariableSlotID slotNumber,
const Item &newValue);
virtual Item rangeVariable(const VariableSlotID slotNumber) const;
virtual void setExpressionVariable(const VariableSlotID slotNumber,
const Expression::Ptr &newValue);
virtual Expression::Ptr expressionVariable(const VariableSlotID slotNumber) const;
virtual Item::Iterator::Ptr positionIterator(const VariableSlotID slot) const;
virtual void setPositionIterator(const VariableSlotID slot,
const Item::Iterator::Ptr &newValue);
virtual ItemCacheCell &itemCacheCell(const VariableSlotID slot);
virtual ItemSequenceCacheCell::Vector &itemSequenceCacheCells(const VariableSlotID slot);
virtual DynamicContext::TemplateParameterHash &templateParameterStore();
protected:
/**
* This function is protected, although it only is used in this class. I don't
* know why it has to be, but it won't compile when private.
*/
template<typename VectorType, typename UnitType>
inline
void setSlotVariable(const VariableSlotID slot,
const UnitType &newValue,
VectorType &container) const;
private:
Item::Vector m_rangeVariables;
Expression::Vector m_expressionVariables;
Item::Iterator::Vector m_positionIterators;
ItemCacheCell::Vector m_itemCacheCells;
ItemSequenceCacheCell::Vector m_itemSequenceCacheCells;
DynamicContext::TemplateParameterHash m_templateParameterStore;
};
#include "qstackcontextbase_tpl_p.h"
/**
* @short A DynamicContext that creates a new scope for variables.
*
* This DynamicContext is used for recursive user function calls, for example.
*/
typedef StackContextBase<DelegatingDynamicContext> StackContext;
}
QT_END_NAMESPACE
#endif
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