SMatrix.h

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#ifndef CondFormats_External_SMATRIX_H
#define CondFormats_External_SMATRIX_H

#include <boost/serialization/base_object.hpp>
#include <boost/serialization/nvp.hpp>
#include <boost/serialization/split_free.hpp>

// std::vector used in DataFormats/EcalDetId/interface/EcalContainer.h
#include <boost/serialization/vector.hpp>
#include <boost/serialization/string.hpp>
#include <boost/serialization/map.hpp>

#include <Math/SMatrix.h>

namespace boost {
  namespace serialization {

    /*
 * Note regarding object tracking: all autos used here
 * must resolve to untracked types, since we use local
 * variables in the stack which could end up with the same
 * address. For the moment, all types resolved by auto here
 * are primitive types, which are untracked by default
 * by Boost Serialization.
 */

    // Math/SMatrix.h
    template <class Archive, typename T, unsigned int D1, unsigned int D2, class R>
    void serialize(Archive& ar, ROOT::Math::SMatrix<T, D1, D2, R>& obj, const unsigned int) {
      unsigned int i = 0;
      for (auto& value : obj) {
        ar& boost::serialization::make_nvp(std::to_string(i).c_str(), value);
        ++i;
      }
    }

  }  // namespace serialization
}  // namespace boost

#endif