Re: [boost] Confused about serialization

From: Neal Becker (ndbecker2_at_[hidden])
Date: 2005-08-26 13:52:38

I think this is OK now.  Here is addition to mersenne_twister.hpp:
  friend class boost::serialization::access;

  template<class Archive>
  inline void save (Archive &ar, const unsigned int) const {
    for (int j = 0; j < state_size; ++j) {
      UIntType x = compute (j);
      ar << boost::serialization::make_nvp("item", const_cast<const
UIntType&>(x));
    }
  }

  template<class Archive>
  inline void load (Archive &ar, const unsigned int) {
    for (int j = 0; j < state_size; ++j) {
      ar >> boost::serialization::make_nvp ("item", x[j]);
    }
    i = state_size;
  }

  template<class Archive>
  void serialize(Archive & ar, const unsigned int file_version) {
    boost::serialization::split_member(ar, *this, file_version);
  }

Also:
#include <boost/serialization/split_member.hpp>
#include <boost/serialization/nvp.hpp>

Here is a simple test that passes:

#include <boost/archive/text_oarchive.hpp>
#include <boost/archive/text_iarchive.hpp>
#include <boost/random.hpp>

typedef  boost::mt19937 rng_t;

int main() {
  rng_t rng1;

  std::ostringstream os;
  boost::archive::text_oarchive oa(os);
  oa << const_cast<const rng_t&>(rng1);

  std::string st (os.str());
  std::istringstream is (st);
  boost::archive::text_iarchive ia (is);
  rng_t rng2;
  ia >> rng2;

  //  std::cout << rng2;
  assert (rng1 == rng2);
}