predicate_indicator.h

// Description: Predicate indicator
// Detail: Accepts based on comparison to a reference object.
// Documentation: indicator.txt

#ifndef PASTELSYS_PREDICATE_INDICATOR_H
#define PASTELSYS_PREDICATE_INDICATOR_H

#include "pastel/sys/indicator/indicator_concept.h"
#include "pastel/sys/predicate/predicate_concept.h"

namespace Pastel
{

    template <typename Type, typename Predicate>
    class Predicate_Indicator
    {
    public:
        explicit Predicate_Indicator(
            const Type& object)
            : object_(object)
        {
        }

        bool operator()(
            const Type& that) const
        {
            return Predicate()(that, object_);
        }

    private:
        Type object_;
    };

    template <typename Type, typename Predicate>
    Predicate_Indicator<Type, Predicate> predicateIndicator(
        const Type& object, const Predicate& predicate)
    {
        return Predicate_Indicator<Type, Predicate>(object);
    }

}

#endif