/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: http://www.qt-project.org/
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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
** 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.
**
** 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qcommonsequencetypes_p.h"

#include "qunresolvedvariablereference_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

UnresolvedVariableReference::UnresolvedVariableReference(const QXmlName &name) : m_name(name)
{
    Q_ASSERT(!m_name.isNull());
}

Expression::Ptr UnresolvedVariableReference::typeCheck(const StaticContext::Ptr &context,
                                                       const SequenceType::Ptr &reqType)
{
    /* We may be called before m_replacement is called, when we're part of a
     * function body whose type checking is performed for. See
     * UserFunctionCallsite::typeCheck(). */
    if(m_replacement)
        return m_replacement->typeCheck(context, reqType);
    else
        return EmptyContainer::typeCheck(context, reqType);
}

SequenceType::Ptr UnresolvedVariableReference::staticType() const
{
    /* We may be called by xmlpatternsview before the typeCheck() stage. */
    if(m_replacement)
        return m_replacement->staticType();
    else
        return CommonSequenceTypes::ZeroOrMoreItems;
}

SequenceType::List UnresolvedVariableReference::expectedOperandTypes() const
{
    return SequenceType::List();
}

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

Expression::ID UnresolvedVariableReference::id() const
{
    return IDUnresolvedVariableReference;
}

QT_END_NAMESPACE