| 1 | #include <fstream>
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| 2 | #include <boost/archive/xml_oarchive.hpp>
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| 3 | #include <boost/archive/xml_iarchive.hpp>
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| 4 | #include <boost/serialization/nvp.hpp>
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| 5 |
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| 6 | struct MyInt {
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| 7 | MyInt():i_(0) {}
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| 8 | MyInt(int i):i_(i) {}
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| 9 | int i_;
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| 10 | friend class boost::serialization::access;
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| 11 | template<class Archive>
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| 12 | void serialize(Archive &ar, unsigned int const /* file_version */)
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| 13 | {
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| 14 | ar & BOOST_SERIALIZATION_NVP(i_);
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| 15 | }
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| 16 | };
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| 17 |
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| 18 | struct Foo {
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| 19 | MyInt& ref_;
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| 20 |
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| 21 | Foo(MyInt& ref):ref_(ref) {}
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| 22 |
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| 23 | friend class boost::serialization::access;
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| 24 |
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| 25 | template<class Archive>
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| 26 | void serialize(Archive &ar, unsigned int const /* file_version */) {}
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| 27 |
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| 28 | template<class Archive>
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| 29 | friend void save_construct_data(Archive& ar,
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| 30 | Foo const* p, unsigned int const /* file_version */);
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| 31 |
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| 32 | template<class Archive>
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| 33 | void load_construct_data(Archive& ar,
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| 34 | Foo* p, unsigned int const /* file_version */);
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| 35 | };
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| 36 |
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| 37 | template<class Archive>
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| 38 | void save_construct_data(Archive& ar, Foo const* p, unsigned int const /* file_version */)
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| 39 | {
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| 40 | #if 0
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| 41 | // OK
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| 42 | MyInt* pRef = &p->ref_;
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| 43 | ar << boost::serialization::make_nvp("ref_", pRef);
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| 44 | #else
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| 45 | // Error
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| 46 | ar << boost::serialization::make_nvp("ref_", &p->ref_);
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| 47 | #endif
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| 48 | }
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| 49 |
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| 50 | template<class Archive>
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| 51 | void load_construct_data(Archive & ar, Foo* p, unsigned int const /* file_version */)
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| 52 | {
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| 53 | MyInt* pRef;
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| 54 | ar >> boost::serialization::make_nvp("ref_", pRef);
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| 55 | ::new(p) Foo(*pRef);
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| 56 | }
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| 57 |
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| 58 | struct Bar {
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| 59 | Bar():mi_(1) {}
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| 60 | MyInt mi_;
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| 61 | Foo* pFoo_;
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| 62 |
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| 63 | friend class boost::serialization::access;
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| 64 | template<class Archive>
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| 65 | void serialize(Archive &ar, unsigned int const /* file_version */)
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| 66 | {
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| 67 | ar & BOOST_SERIALIZATION_NVP(mi_);
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| 68 | ar & BOOST_SERIALIZATION_NVP(pFoo_);
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| 69 | }
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| 70 | };
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| 71 |
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| 72 | int main()
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| 73 | {
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| 74 | {
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| 75 | std::ofstream ofs("ref.xml");
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| 76 | Bar b1;
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| 77 | b1.pFoo_ = new Foo (b1.mi_);
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| 78 | b1.pFoo_->ref_.i_ = 2;
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| 79 | assert(b1.mi_.i_ == 2);
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| 80 | boost::archive::xml_oarchive oa(ofs);
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| 81 | oa << BOOST_SERIALIZATION_NVP(b1);
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| 82 | delete b1.pFoo_;
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| 83 | }
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| 84 | {
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| 85 | std::ifstream ifs("ref.xml");
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| 86 | boost::archive::xml_iarchive ia(ifs);
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| 87 | Bar b2;
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| 88 | ia >> BOOST_SERIALIZATION_NVP(b2);
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| 89 | assert(b2.mi_.i_ == 2);
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| 90 | assert(b2.pFoo_->ref_.i_ == 2);
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| 91 | b2.mi_.i_ = 3;
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| 92 | assert(b2.pFoo_->ref_.i_ == 3);
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| 93 | }
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| 94 | }
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