Re: [Boost-users] boost::serialization oserializer weirdness

From: Robert Ramey (ramey_at_[hidden])
Date: 2008-03-21 00:23:34

One thing that I wonder about here.  Binary archives, the stream should be opened with ios::binary.  I'm not sure how that works with string stream.

Another difference betwen binary and other archives is the special handling for vectors and arrays.  I wouldn't think this should matter here, but it might be looked into.  Try thsi:

Robert Ramey
  "Jerry" <jerry_at_[hidden]> wrote in message news:1b7001c88af9$2cfc4840$0565a8c0_at_p424...
  Using Boost 1.34.1 with VC++ 7.1 SP1

  I have existing code which serializes/de-serializes correctly to boost::archive::xml_oarchive 

  Within the same .cpp file I'm trying to serialize instances of the same hierarchy to boost::archive::binary_oarchive using this code:

  // ultimate sink for serialized data
  std::ostringstream os;
  // binary format is OK as it is going onto the clipboard
  boost::archive::binary_oarchive oa(os);
  // temp storage
  std::vector<CDiagramEntity*> vec;
  // only serialize selected items
  for (std::vector<CDiagramEntity*>::iterator it = m_entities.begin();
  it != m_entities.end();

  ++it)
  {
  if ((*it)->IsSelected())
   // instead of this: 

   // vec.push_back((*it)); 

  try this:

      oa & make_nvp("it", *it);

  }
  // just serialize the selected item vector (*)
  oa & BOOST_SERIALIZATION_NVP(vec);

  * - This is failing in oserializer.hpp line 417, the relevant code being:

  // sice true_type is valid, and this only gets made if the 
  // pointer oserializer object has been created, this should never
  // fail
  bpos_ptr = archive_pointer_oserializer<Archive>::find(* true_type);
  assert(NULL != bpos_ptr);     // <------------------ this assert triggered.

  I note the confident comment above find(). Can anyone help here?

  Many thanks

  Jerry

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