RNTupleFieldPtr.h

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#ifndef PhysicsTools_NanoAOD_RNTupleFieldPtr_h
#define PhysicsTools_NanoAOD_RNTupleFieldPtr_h

#include <ROOT/RNTupleModel.hxx>
using ROOT::Experimental::RNTupleModel;

template <typename T>
class RNTupleFieldPtr {
public:
  RNTupleFieldPtr() = default;
  explicit RNTupleFieldPtr(const std::string& name, const std::string& desc, RNTupleModel& model) : m_name(name) {
    m_field = model.MakeField<T>({m_name, desc});
  }
  void fill(const T& value) { *m_field = value; }
  const std::string& getFieldName() const { return m_name; }

private:
  std::string m_name;
  std::shared_ptr<T> m_field;
};

#endif