/****************************************************************************
**
** Copyright (C) 2010 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qboolean_p.h"
#include "qgenericsequencetype_p.h"

#include "qrangevariablereference_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

RangeVariableReference::RangeVariableReference(const Expression::Ptr &source,
                                               const VariableSlotID slotP) : VariableReference(slotP),
                                                                             m_sourceExpression(source)
{
    Q_ASSERT(source);
}

bool RangeVariableReference::evaluateEBV(const DynamicContext::Ptr &context) const
{
    Q_ASSERT_X(context->rangeVariable(slot()), Q_FUNC_INFO, "The range variable must be set.");
    return Boolean::evaluateEBV(context->rangeVariable(slot()), context);
}

Item RangeVariableReference::evaluateSingleton(const DynamicContext::Ptr &context) const
{
    Q_ASSERT_X(context->rangeVariable(slot()), Q_FUNC_INFO, "The range variable must be set.");
    return context->rangeVariable(slot());
}

SequenceType::Ptr RangeVariableReference::staticType() const
{
    return makeGenericSequenceType(m_sourceExpression->staticType()->itemType(),
                                   Cardinality::exactlyOne());
}

Expression::ID RangeVariableReference::id() const
{
    return IDRangeVariableReference;
}

ExpressionVisitorResult::Ptr
RangeVariableReference::accept(const ExpressionVisitor::Ptr &visitor) const
{
    return visitor->visit(this);
}

Expression::Properties RangeVariableReference::properties() const
{
    return DependsOnLocalVariable;
}

QT_END_NAMESPACE
