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** This file is part of the QtXmlPatterns module of the Qt Toolkit.
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****************************************************************************/

#include "qcommonsequencetypes_p.h"
#include "qinteger_p.h"

#include "qpositionalvariablereference_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

PositionalVariableReference::PositionalVariableReference(const VariableSlotID s) : VariableReference(s)
{
}

Item PositionalVariableReference::evaluateSingleton(const DynamicContext::Ptr &context) const
{
    Q_ASSERT(context);
    Q_ASSERT(context->positionIterator(slot()));
    return Integer::fromValue(context->positionIterator(slot())->position());
}

bool PositionalVariableReference::evaluateEBV(const DynamicContext::Ptr &) const
{
    return true;
}

SequenceType::Ptr PositionalVariableReference::staticType() const
{
    return CommonSequenceTypes::ExactlyOneInteger;
}

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

ExpressionVisitorResult::Ptr

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

QT_END_NAMESPACE