observable.h

Go to the documentation of this file.

//
// APFEL++ 2017
//
// Author: Valerio Bertone: valerio.bertone@cern.ch
//
 
#pragma once
 
#include "apfel/set.h"
#include "apfel/operator.h"
 
namespace apfel
{
  template<class T = Distribution>
  class Observable
  {
  public:
    struct ConvolutionPair
    {
      ConvolutionPair(std::function<Set<Operator>(double const&)> const& C, std::function<Set<T>(double const&)> const& O): CoefficientFunctions(C), Objects(O) {}
      std::function<Set<Operator>(double const&)> CoefficientFunctions;
      std::function<Set<T>(double const&)>        Objects;
    };
 
    Observable();
 
    Observable(std::vector<ConvolutionPair> ConvPair);
 
    Observable(std::function<Set<Operator>(double const&)> const& CoefficientFunctions,
               std::function<Set<T>(double const&)>        const& Objects);
 
    void AddConvolutionPair(std::function<Set<Operator>(double const&)> const& CoefficientFunctions,
                            std::function<Set<T>(double const&)>        const& Objects);
 
 
    T Evaluate(double const& Q) const;
 
    double Evaluate(double const& x, double const& Q) const;
 
    void SetObjects(std::function<Set<T>(double const&)> const& Objects, int const& ip = 0);
 
    std::function<Set<Operator>(double const&)> GetCoefficientFunctions(int const& ip = 0) const;
 
  private:
    std::vector<ConvolutionPair> _ConvPair;
  };
}