it would seem to me that a private constructor in this context is a compile time error. In this case we've got A A::a; created at pre-main time by the C++ runtime initialization. The constructor is public - as it must be to be used in this way. By the same token, the destructor would have to be public also. I don't know why this passed before - perhaps the change to VC 9 is what's provoking the new behavior. Robert Ramey Paul Roberts wrote:
Hi,
I just upgraded from trunk for the first time in a few weeks, and now I'm unable to compile classes that use serialization and have private destructors. It seems boost::serialization::extended_type_info_typeid is now trying to access those destructors, and failing.
Do I need to friend extended_type_info_typeid now, as well as boost::serialization::access, or is this a genuine bug? I've provided a minimal repro case below, followed by the compiler output from MSVC 9.
Regards,
-- Paul Roberts paul at pwroberts dot com http://www.m3fe.com/
#include <boost/serialization/access.hpp> #include <boost/serialization/split_member.hpp> #include <boost/archive/binary_oarchive.hpp> #include <fstream>
class A { friend class boost::serialization::access; private: ~A() {}
template<typename Archive> void serialize(Archive& ar, const unsigned int version) { }
public: static A a; };
A A::a;
int main() { std::ofstream ofs("hi"); { boost::archive::binary_oarchive oa(ofs); oa << A::a; } }
/*
1>------ Build started: Project: 2k8test, Configuration: Release Win32 ------ 1>Compiling... 1>serialization_fun.cpp 1>C:\dev\boost-trunk\boost/serialization/extended_type_info_typeid.hpp(118) : error C2248: 'A::~A' : cannot access private member declared in class 'A' 1> .\serialization_fun.cpp(18) : compiler has generated 'A::~A' here 1> .\serialization_fun.cpp(7) : see declaration of 'A' 1> C:\dev\boost-trunk\boost/serialization/extended_type_info_typeid.hpp(117) : while compiling class template member function 'void boost::serialization::extended_type_info_typeid<T>::destroy(const void *const ) const' 1> with 1> [ 1> T=A 1> ] 1> C:\dev\boost-trunk\boost/archive/detail/oserializer.hpp(110) : see reference to class template instantiation 'boost::serialization::extended_type_info_typeid<T>' being compiled 1> with 1> [ 1> T=A 1> ] 1> C:\dev\boost-trunk\boost/archive/detail/oserializer.hpp(107) : while compiling class template member function 'boost::archive::detail::oserializer<Archive,T>::oserializer(void)' 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=A 1> ] 1> C:\dev\boost-trunk\boost/archive/detail/oserializer.hpp(234) : see reference to class template instantiation 'boost::archive::detail::oserializer<Archive,T>' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=A 1> ] 1> C:\dev\boost-trunk\boost/archive/detail/oserializer.hpp(228) : while compiling class template member function 'void boost::archive::detail::save_non_pointer_type<Archive,T>::save_standard::invoke(Archive &,const T &)' 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=A 1> ] 1> C:\dev\boost-trunk\boost/archive/detail/oserializer.hpp(292) : see reference to class template instantiation 'boost::archive::detail::save_non_pointer_type<Archive,T>::save_standard' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=A 1> ] 1> C:\dev\boost-trunk\boost/archive/detail/oserializer.hpp(280) : while compiling class template member function 'void boost::archive::detail::save_non_pointer_type<Archive,T>::invoke(Archive &,const T &)' 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=A 1> ] 1> C:\dev\boost-trunk\boost/archive/detail/oserializer.hpp(498) : see reference to class template instantiation 'boost::archive::detail::save_non_pointer_type<Archive,T>' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=A 1> ] 1> C:\dev\boost-trunk\boost/archive/detail/common_oarchive.hpp(64) : see reference to function template instantiation 'void boost::archive::save<Archive,const T>(Archive &,const T &)' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=A 1> ] 1> C:\dev\boost-trunk\boost/archive/array/oarchive.hpp(118) : see reference to function template instantiation 'void boost::archive::detail::common_oarchive<Archive>::save_override<const T>(T &,int)' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=A 1> ] 1> C:\dev\boost-trunk\boost/archive/basic_binary_oarchive.hpp(64) : see reference to function template instantiation 'void boost::archive::array::oarchive<Archive>::save_override<T>(const T &,unsigned int)' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=A 1> ] 1> C:\dev\boost-trunk\boost/archive/binary_oarchive_impl.hpp(45) : see reference to function template instantiation 'void boost::archive::basic_binary_oarchive<Archive>::save_override<T>(const T &,int)' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=A 1> ] 1> C:\dev\boost-trunk\boost/archive/detail/interface_oarchive.hpp(63) : see reference to function template instantiation 'void boost::archive::binary_oarchive_impl<Archive,Elem,Tr>::save_override<T>(T &,int)' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> Elem=char, 1> Tr=std::char_traits<char>, 1> T=A 1> ] 1> .\serialization_fun.cpp(27) : see reference to function template instantiation 'Archive &boost::archive::detail::interface_oarchive<Archive>::operator <<<A>(T &)' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=A 1> ] 1>Build log was saved at "file://c:\dev\work\2k8test\Release\BuildLog.htm" 1>2k8test - 1 error(s), 0 warning(s) ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
*/
_______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost