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** This file is part of the QtXmlPatterns module of the Qt Toolkit.
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#include "qbuiltintypes_p.h"
#include "qcommonsequencetypes_p.h"

#include "qparentnodeaxis_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

Item ParentNodeAxis::evaluateSingleton(const DynamicContext::Ptr &context) const
{
    return context->contextItem().asNode().iterate(QXmlNodeModelIndex::AxisParent)->next();
}

Expression::Properties ParentNodeAxis::properties() const
{
    return DisableElimination | RequiresContextItem;
}

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

ItemType::Ptr ParentNodeAxis::expectedContextItemType() const
{
    return BuiltinTypes::node;
}

SequenceType::Ptr ParentNodeAxis::staticType() const
{
    // Parentless node exists.
    return CommonSequenceTypes::ZeroOrOneNode;
}

QT_END_NAMESPACE