qdistinctiterator_p.h

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//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.

#ifndef Patternist_DistinctIterator_H
#define Patternist_DistinctIterator_H

#include <QList>

#include "qexpression_p.h"
#include "qitem_p.h"
#include "qatomiccomparator_p.h"
#include "qcomparisonplatform_p.h"
#include "qsourcelocationreflection_p.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

namespace QPatternist
{

    class DistinctIterator : public Item::Iterator
                           , public ComparisonPlatform<DistinctIterator, false>
                           , public SourceLocationReflection
    {
    public:
        DistinctIterator(const Item::Iterator::Ptr &seq,
                         const AtomicComparator::Ptr &comp,
                         const Expression::ConstPtr &expression,
                         const DynamicContext::Ptr &context);

        virtual Item next();
        virtual Item current() const;
        virtual xsInteger position() const;
        virtual Item::Iterator::Ptr copy() const;
        virtual const SourceLocationReflection *actualReflection() const;

        inline AtomicComparator::Operator operatorID() const
        {
            return AtomicComparator::OperatorEqual;
        }

    private:
        const Item::Iterator::Ptr   m_seq;
        const DynamicContext::Ptr   m_context;
        const Expression::ConstPtr  m_expr;
        Item                        m_current;
        xsInteger                   m_position;
        Item::List                  m_processed;
    };
}

QT_END_NAMESPACE

QT_END_HEADER

#endif