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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** 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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, 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: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qcommonvalues_p.h"
#include "qcommonsequencetypes_p.h"
#include "qemptysequencetype_p.h"
#include "qemptysequence_p.h"
QT_BEGIN_NAMESPACE
using namespace QPatternist;
Expression::Ptr EmptySequence::create(const Expression *const replacementFor,
const StaticContext::Ptr &context)
{
Q_ASSERT(replacementFor);
Q_ASSERT(context);
const Expression::Ptr retval(new EmptySequence());
context->wrapExpressionWith(replacementFor, retval);
return retval;
}
Item::Iterator::Ptr EmptySequence::evaluateSequence(const DynamicContext::Ptr &) const
{
return CommonValues::emptyIterator;
}
Item EmptySequence::evaluateSingleton(const DynamicContext::Ptr &) const
{
return Item();
}
void EmptySequence::evaluateToSequenceReceiver(const DynamicContext::Ptr &) const
{
}
ItemType::Ptr EmptySequence::type() const
{
return CommonSequenceTypes::Empty;
}
SequenceType::Ptr EmptySequence::staticType() const
{
return CommonSequenceTypes::Empty;
}
bool EmptySequence::evaluateEBV(const DynamicContext::Ptr &) const
{
return false;
}
QString EmptySequence::stringValue() const
{
return QString();
}
ExpressionVisitorResult::Ptr EmptySequence::accept(const ExpressionVisitor::Ptr &visitor) const
{
return visitor->visit(this);
}
Expression::ID EmptySequence::id() const
{
return IDEmptySequence;
}
Expression::Properties EmptySequence::properties() const
{
return IsEvaluated;
}
QT_END_NAMESPACE
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