Ticket #1037: pointerconflict.cpp

#include <boost/archive/binary_oarchive.hpp>
#include <boost/archive/binary_iarchive.hpp>
#include <boost/serialization/split_member.hpp>
#include <boost/serialization/serialization.hpp>
#include <cstdio>
#include <fstream>

template <class T>
struct Vector  {
  Vector() {}
  Vector(int sz) : size(sz), data(new T[sz]) {}

  T& operator[](int i) { return data[i]; }

  template<class Archive>
  void save(Archive& ar, int) {
  }

  template<class Archive>
  void save(Archive& ar, int) const {
    ar & size;
    for (int i = size; i-- > 0; ar & data[i]);
  }

  template<class Archive>
  void load(Archive& ar, int) {
    ar & size;
    data = new T[size];
    for (int i = size; i-- > 0; ar & data[i]);
  }

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

  int size;
  T* data;
};

struct Triggerable {
public:
  virtual void trigger() = 0;
  template<class Archive>
  void serialize(Archive&, int) { }
};

BOOST_IS_ABSTRACT(Triggerable);

struct Event : Triggerable
{
  Event() {}
  void trigger() {}
  template<class Archive>
  void serialize(Archive& ar, int) {
    ar & boost::serialization::base_object<Triggerable>(*this);
    ar & a;
  }
  int a;
};

struct Cell {
  Cell() : e(0) {}
  Event* e;
  template<class Archive>
  void serialize(Archive& ar, int) {
    ar & e;
  }
};

struct EventQueue {
  EventQueue() {}
  EventQueue(int sz, bool full) : cells(sz), event(sz) {
    for (int i = sz/2; i-- > 0; cells[2*i+1].e = cells[2*i].e = &event[i]);
  }

  template<class Archive>
  void serialize(Archive& ar, int) {
    ar & cells  & event ;
//    ar  & event  & cells; // works fine
  }

  Vector<Event> event;
  Vector<Cell> cells;
};

template<class T>
void store(const T& v) {
  std::ofstream ofs("filename");
  boost::archive::binary_oarchive oa(ofs);
  oa << v;
}

template<class T>
void restore(T& v) {
  std::ifstream ifs("filename", std::ios::binary);
  boost::archive::binary_iarchive ia(ifs);
  ia >> v;
}

int main(int argc, char**) {
  EventQueue eq(5, argc > 1);
  for (int i = 5; i-- > 0; printf("%d=%p\n",i,eq.cells[i].e)); fflush(stdout);
  store(eq);
  EventQueue neq;
  restore(neq);
  for (int i = 5; i-- > 0; printf("%d=%p\n",i,neq.cells[i].e)); fflush(stdout);
  return 0;
}