indicator_downfilter.h

// Description: Down filter from indicators
// Documentation: downfilter.txt

#ifndef PASTELSYS_INDICATOR_DOWNFILTER_H
#define PASTELSYS_INDICATOR_DOWNFILTER_H

#include "pastel/sys/downfilter/downfilter_concept.h"
#include "pastel/sys/indicator/indicator_concept.h"

namespace Pastel
{

    template <
        typename Element_Indicator,
        typename DownSet_Indicator>
    class Indicator_DownFilter
    {
    public:
        Indicator_DownFilter(
            const Element_Indicator& elementIndicator,
            const DownSet_Indicator& downSetIndicator)
        : elementIndicator_(elementIndicator)
        , downSetIndicator_(downSetIndicator)
        {
        }

        template <typename Type>
        bool element(Type&& that) const
        {
            return elementIndicator_(std::forward<Type>(that));
        }

        template <typename Type>
        bool downSet(Type&& that) const
        {
            return downSetIndicator_(std::forward<Type>(that));
        }

    private:
        const Element_Indicator& elementIndicator_;
        const DownSet_Indicator& downSetIndicator_;
    };

    template <
        typename Element_Indicator,
        typename DownSet_Indicator>
    Indicator_DownFilter<Element_Indicator, DownSet_Indicator>
        indicatorDownFilter(
            const Element_Indicator& elementIndicator,
            const DownSet_Indicator& downSetIndicator)
    {
        return Indicator_DownFilter<Element_Indicator, DownSet_Indicator>(
            elementIndicator, downSetIndicator);

    }

}

#endif