Robert Ramey wrote:

ray@maya-studio.com wrote:

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That's likely something else entirely. We'd have to see more code. Forget my previous post, the exception was due to mixed up ofstream and ifstream...

Just to resume - if I have a list of pointers to the objects (all derived from the same base class) and I'd like to serialize them through a reference, a code like this would be needed:

// List of pointers A a; B b; // Derived from A C c; // Derived from C std::list<A*> list; list.push_back(&a); // Base list.push_back(&b); // Derived list.push_back(&c); // Derived ... // Save std::ofstream ofs("c:/test.xml"); boost::archive::xml_oarchive oa(ofs); BOOST_FOREACH(A* pA, list) { if (dynamic_cast<B*>(pA)) { B& b = *static_cast<B*>(pA); oa & BOOST_SERIALIZATION_NVP(b); } else if (dynamic_cast<C*>(pA)) { C& c = *pA; BOOST_SERIALIZATION_NVP(c); } else { A& a = *pA; BOOST_SERIALIZATION_NVP(a); } }

Am I right?

It's not absolutely clear what your object here is. But the following would be equivalent to the above as far as I can tell - and a lot simpler

// Save std::ofstream ofs("c:/test.xml"); boost::archive::xml_oarchive oa(ofs); oa << list;

whoops, I missed the part about skipping the pointer part. So I guess your method above would work - though I'd have to think about it. of course if you had std::list<A &> list; there would be nothing to do. Robert Ramey