qaggregatefns_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_AggregateFNs_H
#define Patternist_AggregateFNs_H

#include "qaggregator_p.h"
#include "qatomiccomparator_p.h"
#include "qatomicmathematician_p.h"
#include "qcomparisonplatform_p.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

namespace QPatternist
{
    class CountFN : public FunctionCall
    {
    public:
        virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;

        virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context,
                                          const SequenceType::Ptr &reqType);
        virtual Expression::Ptr compress(const StaticContext::Ptr &context);
    };

    class AddingAggregate : public FunctionCall
    {
    public:
        virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context,
                                          const SequenceType::Ptr &reqType);
    protected:
        AtomicMathematician::Ptr m_mather;
    };

    class AvgFN : public AddingAggregate
    {
    public:
        virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
        virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context,
                                          const SequenceType::Ptr &reqType);

        virtual SequenceType::Ptr staticType() const;
    private:
        AtomicMathematician::Ptr m_adder;
        AtomicMathematician::Ptr m_divider;
    };

    class SumFN : public AddingAggregate
    {
    public:
        virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
        virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context,
                                          const SequenceType::Ptr &reqType);
        virtual SequenceType::Ptr staticType() const;
    };
}

QT_END_NAMESPACE

QT_END_HEADER

#endif