identity_function.h

// Description: Identity function
// Documentation: functions.txt

#ifndef PASTELSYS_IDENTITY_FUNCTION_H
#define PASTELSYS_IDENTITY_FUNCTION_H

#include "pastel/sys/function/function_concept.h"

namespace Pastel
{

    //! A function f(x) = x.
    struct Identity_Function
    {
        template <typename Type>
        const Type& operator()(const Type& x) const
        {
            return x;
        }
    };

}

#endif