Extrapolator.h

// -*- C++ -*-
//
// This file is part of LHAPDF
// Copyright (C) 2012-2023 The LHAPDF collaboration (see AUTHORS for details)
//
#pragma once
#ifndef LHAPDF_Extrapolator_H
#define LHAPDF_Extrapolator_H

#include "LHAPDF/Utils.h"

namespace LHAPDF {


  // Forward declaration
  class GridPDF;


  class Extrapolator {
  public:

    virtual ~Extrapolator() { }



    void bind(const GridPDF* pdf) { _pdf = pdf; }

    void unbind() { _pdf = 0; }

    bool hasPDF() { return _pdf != 0; }

    const GridPDF& pdf() const { return *_pdf; }




    double extrapolateXQ(int id, double x, double q) const {
      return extrapolateXQ2(id, x, q*q );
    }

    virtual double extrapolateXQ2(int id, double x, double q2) const = 0;





  private:

    const GridPDF* _pdf;

  };


}
#endif