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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_RangeVariableReference_H

#define Patternist_RangeVariableReference_H

#include "qvariablereference_p.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

namespace QPatternist

{

    /**

     * @short A reference to a variable declared with @c for or a quantification

     * expression, but not for instance a @c let binding.

     *

     * A range variable always represents a single item, while an other

     * expression provides the binding and iteration. A @c for expression is

     * a good example.

     *

     * @author Frans Englich <frans.englich@nokia.com>

     * @ingroup Patternist_expressions

     */

    class RangeVariableReference : public VariableReference

    {

    public:

        RangeVariableReference(const Expression::Ptr &sourceExpression,

                               const VariableSlotID slot);

        virtual bool evaluateEBV(const DynamicContext::Ptr &context) const;

        virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;

        virtual SequenceType::Ptr staticType() const;

        /**

         * @returns IDRangeVariableReference

         */

        virtual ID id() const;

        virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;

        virtual Properties properties() const;

    private:

        const Expression::Ptr m_sourceExpression;

    };

}

QT_END_NAMESPACE

QT_END_HEADER

#endif