CollectionBranches.h

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#ifndef PODIO_COLLECTIONBRANCHES_H
#define PODIO_COLLECTIONBRANCHES_H
 
#include "TBranch.h"
 
#include <vector>
 
namespace podio::root_utils {
/**
 * Small helper struct to collect all branches that are necessary to read or
 * write a collection. Needed to cache the branch pointers and avoid having to
 * get them from a TTree/TChain for every event.
 */
struct CollectionBranches {
  TBranch* data{nullptr};
  std::vector<TBranch*> refs{};
  std::vector<TBranch*> vecs{};
};
 
} // namespace podio::root_utils
 
#endif