ParameterVariant.h

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
#pragma once
 
#include <framework/core/ModuleParam.h>
 
#include <boost/variant/variant.hpp>
 
#include <string>
#include <vector>
#include <map>
 
namespace Belle2 {
  class ModuleParamList;
 
  namespace TrackFindingCDC {
 
    using ParameterVariant =
      boost::variant<bool, int, double, std::string, std::vector<double>, std::vector<std::string>>;
 
    using ParameterVariantMap = std::map<std::string, ParameterVariant>;
 
    struct AssignParameterVisitor : public boost::static_visitor<> {
 
      template <class ... T>
      static void update(ModuleParamList* moduleParamList,
                         const std::map<std::string, boost::variant<T...> >& valuesByName)
      {
        for (auto& nameAndValue : valuesByName) {
          const std::string& name = nameAndValue.first;
          const boost::variant<T...>& value = nameAndValue.second;
          AssignParameterVisitor visitor(moduleParamList, name);
          boost::apply_visitor(visitor, value);
        }
      }
 
      AssignParameterVisitor(ModuleParamList* moduleParamList, const std::string& paramName);
 
      template <class T>
      void operator()(const T& t) const;
 
    private:
      ModuleParamList* m_moduleParamList;
 
      std::string m_paramName;
    };
 
  }
 
  extern template class Belle2::ModuleParam<TrackFindingCDC::ParameterVariant>;
  extern template class Belle2::ModuleParam<TrackFindingCDC::ParameterVariantMap>;
  extern template class Belle2::ModuleParam<std::vector<TrackFindingCDC::ParameterVariantMap> >;
}