/**
   \file constant.hpp
   \brief constant model
   \author Junhua Gu
 */


#ifndef CONSTANT_MODEL_H_
#define CONSTANT_MODEL_H_
#define OPT_HEADER
#include <core/fitter.hpp>
#include <cmath>

namespace opt_utilities
{
  template <typename T>
  class constant
    :public model<T,T,std::vector<T>,std::string>
  {
  private:
    model<T,T,std::vector<T> >* do_clone()const
    {
      return new constant<T>(*this);
    }
    const char* do_get_type_name()const
    {
      return "constant";
    }
  public:
    constant()
    {
      this->push_param_info(param_info<std::vector<T> >("c",1));
    }

  public:
    T do_eval(const T& x,const std::vector<T>& param)
    {
      //return x*param[0]+param[1];
      return get_element(param,0);
    }

  private:
    std::string do_get_information()const
    {
      return "Constant\n"
	"y=C\n";
    }
  };
}



#endif
//EOF