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#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