qevaluationcache_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_EvaluationCache_H
#define Patternist_EvaluationCache_H

#include "qcachingiterator_p.h"
#include "qcommonsequencetypes_p.h"
#include "qnodebuilder_p.h"
#include "qoperandsiterator_p.h"
#include "qsinglecontainer_p.h"
#include "qvariabledeclaration_p.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

namespace QPatternist
{
    template<bool IsForGlobal>
    class EvaluationCache : public SingleContainer
    {
    public:
        EvaluationCache(const Expression::Ptr &operand,
                        const VariableDeclaration *varDecl,
                        const VariableSlotID slot);

        virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
        virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &context) const;
        virtual Expression::Ptr compress(const StaticContext::Ptr &context);

        virtual SequenceType::Ptr staticType() const;

        virtual SequenceType::List expectedOperandTypes() const;

        virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;
        virtual Properties properties() const;
        virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context,
                                          const SequenceType::Ptr &reqType);
        virtual const SourceLocationReflection *actualReflection() const;

        inline VariableSlotID slot() const
        {
            return m_varSlot;
        }

    private:
        static DynamicContext::Ptr topFocusContext(const DynamicContext::Ptr &context);
        const VariableDeclaration* m_declaration;
        bool m_declarationUsedByMany;
        const VariableSlotID            m_varSlot;
    };

#include "qevaluationcache.cpp"
}

QT_END_NAMESPACE

QT_END_HEADER

#endif