No such checking is built in. If you really need this it would have to be done by making a derivation from an existing archive. Robert Ramey Oliver.Kowalke@infineon.com wrote:
Oliver.Kowalke@infineon.com wrote:
Hello, is it possible to prevent that the archive of class X can be restored in class Y (both have the same layout)?
I don't understand what this means. Robert Ramey
I don't want Y created from a archive containing a X. Please look at the code below:
#include <iostream> #include <sstream> #include <stdexcept>
#include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> #include <boost/archive/xml_iarchive.hpp> #include <boost/archive/xml_oarchive.hpp> #include <boost/serialization/nvp.hpp> #include <boost/serialization/level.hpp> #include <boost/serialization/export.hpp>
class X { public: friend class boost::serialization::access;
template< typename Archive > void serialize( Archive & ar, unsigned int version) { ar & BOOST_SERIALIZATION_NVP( degrees); ar & BOOST_SERIALIZATION_NVP( city); }
int degrees; std::string city;
X(){};
X( int d, std::string const& c)
degrees( d), city( c) {} };
// BOOST_CLASS_EXPORT(X) // BOOST_CLASS_IMPLEMENTATION(X, boost::serialization::object_class_info)
class Y { public: friend class boost::serialization::access;
template< typename Archive > void serialize( Archive & ar, unsigned int version) { ar & BOOST_SERIALIZATION_NVP( degrees); ar & BOOST_SERIALIZATION_NVP( city); }
int degrees; std::string city;
Y(){};
Y( int d, std::string const& c)
degrees( d), city( c) {} };
// BOOST_CLASS_EXPORT(Y) // BOOST_CLASS_IMPLEMENTATION(Y, boost::serialization::object_class_info)
int main() { try { std::stringstream ss;
int degrees = -1342; std::string city;
city += "abc";
{ boost::archive::text_oarchive oa( ss);
const X g( degrees, city);
oa << g; }
std::cout << ss.str() << std::endl;
{ boost::archive::text_iarchive ia( ss);
Y g;
ia >> g; // I would expect an exception; at least not Y rtestored
if ( g.degrees == degrees && g.city == city) std::cout << "equal" << std::endl; else std::cout << "not equal" << std::endl; }
return 0; } catch ( std::exception const& e) { std::cerr << e.what() << std::endl; } catch (...) { std::cerr << "unhandled" << std::endl; }
return -1; }
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