qnodecomparison_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_NodeComparison_H
#define Patternist_NodeComparison_H

#include "qpaircontainer_p.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

namespace QPatternist
{

    class Q_AUTOTEST_EXPORT NodeComparison : public PairContainer
    {
    public:
        NodeComparison(const Expression::Ptr &operand1,
                       const QXmlNodeModelIndex::DocumentOrder op,
                       const Expression::Ptr &operand2);

        virtual Item evaluateSingleton(const DynamicContext::Ptr &) const;
        virtual bool evaluateEBV(const DynamicContext::Ptr &) const;

        virtual SequenceType::List expectedOperandTypes() const;

        virtual QXmlNodeModelIndex::DocumentOrder operatorID() const;
        virtual Expression::Ptr compress(const StaticContext::Ptr &context);

        virtual SequenceType::Ptr staticType() const;

        static QString displayName(const QXmlNodeModelIndex::DocumentOrder op);

        virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;
    private:
        enum Result
        {
            Empty,
            True,
            False
        };
        inline Result evaluate(const DynamicContext::Ptr &context) const;

        const QXmlNodeModelIndex::DocumentOrder m_op;

    };
}

QT_END_NAMESPACE

QT_END_HEADER

#endif