Persisting __int64 (or long long) with boost::serialization?
Hi, Sorry for the n00b question, but I'm trying to serialize some unsigned __int64 member variables using boost::serialization. I added the following to my header: namespace boost { namespace serialization { template<class Archive> void load(Archive & ar, unsigned __int64& big, const unsigned int version) { size_t size = sizeof(big); ar.load_binary(&big, size); } template<class Archive> void save(Archive & ar, unsigned __int64 big, const unsigned int version) { ar & sizeof(big); ar.save_binary(&big, sizeof(big)); } } }; But the compiler still complains that it doesn't know how to handle that right-hand operand. Is there something obvious here I'm missing? Thanks -S
AMDG Sandy Walsh wrote:
Sorry for the n00b question, but I'm trying to serialize some unsigned __int64 member variables using boost::serialization.
I added the following to my header:
namespace boost { namespace serialization { template<class Archive> void load(Archive & ar, unsigned __int64& big, const unsigned int version) ;
template<class Archive> void save(Archive & ar, unsigned __int64 big, const unsigned int version) ; } };
But the compiler still complains that it doesn't know how to handle that right-hand operand.
Is there something obvious here I'm missing?
See http://tinyurl.com/oqwk3v. In Christ, Steven Watanabe
Steven Watanabe wrote:
See http://tinyurl.com/oqwk3v. Thanks Steve, I tried that but I'm still getting no joy ...
Could it be that unsigned __int64 is not a class, but an integral data type?
I have two typedefs of unsigned __int64 type: TimeCode and FileSize. I'm
assuming the compiler is smart enough to infer the difference.
I've changed my source according to the docs:
namespace boost
{
namespace serialization
{
template<class Archive>
void save(Archive & ar, const unsigned __int64& big, unsigned
int version)
{
ar & sizeof(big);
ar.save_binary(&big, sizeof(big));
}
template<class Archive>
void load(Archive & ar, unsigned __int64& big, unsigned int version)
{
size_t size = sizeof(big);
ar.load_binary(&big, size);
}
}
};
BOOST_SERIALIZATION_SPLIT_FREE(unsigned __int64)
And it still complains with
VideoStorage.cpp
1>c:\src\storagetest\storagetest\videostorage.h(66) : error C2679:
binary '&' : no operator found which takes a right-hand operand of type
'Storage::TimeCode' (or there is no acceptable conversion)
1> c:\program
files\boost\boost_1_38\boost\archive\detail\interface_oarchive.hpp(70):
could be 'Archive
&boost::archive::detail::interface_oarchive<Archive>::operator
&Storage::FileSize(T &)'
1> with
1> [
1> Archive=boost::archive::binary_oarchive,
1> T=Storage::FileSize
1> ]
1> while trying to match the argument list
'(boost::archive::binary_oarchive, Storage::TimeCode)'
1> c:\program
files\boost\boost_1_38\boost\serialization\access.hpp(93) : see
reference to function template instantiation 'void
Storage::Frame::save<Archive>(Archive &,const unsigned int) const' being
compiled
1> with
1> [
1> Archive=boost::archive::binary_oarchive
1> ]
1> c:\program
files\boost\boost_1_38\boost\serialization\split_member.hpp(43) : see
reference to function template instantiation 'void
boost::serialization::access::member_save
Seems the problem was how I was using the & operator. I changed my save() method innards from: ar & get_when(); to ar & when; and it compiled fine. I suspect I left a const off on the accessors (which I'll test shortly). Sorry for the false alarm and thanks again Steven. -S
The code as posted looks solid to me.
This might be trivial, but
Checked that the code is actually included in the place where the
serialization is instatiated ?
Have you tried replacing your typedefs with __int64 ? (thus removing the
typedefs)
Or maybe use the STRONG_TYPEDEF macro that comes with serialization lib
(undocumented i think).
On Wed, May 20, 2009 at 1:22 PM, Sandy Walsh
Steven Watanabe wrote:
Thanks Steve, I tried that but I'm still getting no joy ...
Could it be that unsigned __int64 is not a class, but an integral data type?
I have two typedefs of unsigned __int64 type: TimeCode and FileSize. I'm assuming the compiler is smart enough to infer the difference.
I've changed my source according to the docs:
namespace boost { namespace serialization {
template<class Archive> void save(Archive & ar, const unsigned __int64& big, unsigned int version) { ar & sizeof(big); ar.save_binary(&big, sizeof(big)); }
template<class Archive> void load(Archive & ar, unsigned __int64& big, unsigned int version) { size_t size = sizeof(big); ar.load_binary(&big, size); }
} };
BOOST_SERIALIZATION_SPLIT_FREE(unsigned __int64)
And it still complains with VideoStorage.cpp 1>c:\src\storagetest\storagetest\videostorage.h(66) : error C2679: binary '&' : no operator found which takes a right-hand operand of type 'Storage::TimeCode' (or there is no acceptable conversion) 1> c:\program files\boost\boost_1_38\boost\archive\detail\interface_oarchive.hpp(70): could be 'Archive &boost::archive::detail::interface_oarchive<Archive>::operator &Storage::FileSize(T &)' 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=Storage::FileSize 1> ] 1> while trying to match the argument list '(boost::archive::binary_oarchive, Storage::TimeCode)' 1> c:\program files\boost\boost_1_38\boost\serialization\access.hpp(93) : see reference to function template instantiation 'void Storage::Frame::save<Archive>(Archive &,const unsigned int) const' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive 1> ] 1> c:\program files\boost\boost_1_38\boost\serialization\split_member.hpp(43) : see reference to function template instantiation 'void boost::serialization::access::member_save
(Archive &,T &,const unsigned int)' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=Storage::Frame 1> ] 1> c:\program files\boost\boost_1_38\boost\serialization\split_member.hpp(42) : while compiling class template member function 'void boost::serialization::detail::member_saver ::invoke(Archive &,const T &,const unsigned int)' 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=Storage::Frame 1> ] 1> c:\program files\boost\boost_1_38\boost\serialization\split_member.hpp(69) : see reference to class template instantiation 'boost::serialization::detail::member_saver ' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=Storage::Frame 1> ] 1> c:\src\storagetest\storagetest\videostorage.h(78) : see reference to function template instantiation 'void boost::serialization::split_member (Archive &,T &,const unsigned int)' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=Storage::Frame 1> ] 1> c:\program files\boost\boost_1_38\boost\serialization\access.hpp(109) : see reference to function template instantiation 'void Storage::Frame::serialize<Archive>(Archive &,const unsigned int)' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive 1> ] 1> c:\program files\boost\boost_1_38\boost\serialization\serialization.hpp(74) : see reference to function template instantiation 'void boost::serialization::access::serialize (Archive &,T &,const unsigned int)' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=const Storage::Frame 1> ] 1> c:\program files\boost\boost_1_38\boost\serialization\serialization.hpp(133) : see reference to function template instantiation 'void boost::serialization::serialize (Archive &,T &,const unsigned int)' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=const Storage::Frame 1> ] 1> c:\program files\boost\boost_1_38\boost\archive\detail\oserializer.hpp(148) : see reference to function template instantiation 'void boost::serialization::serialize_adl (Archive &,T &,const unsigned int)' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=const Storage::Frame 1> ] 1> c:\program files\boost\boost_1_38\boost\archive\detail\oserializer.hpp(140) : while compiling class template member function 'void boost::archive::detail::oserializer ::save_object_data(boost::archive::detail::basic_oarchive &,const void *) const' 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=Storage::Frame 1> ] 1> c:\program files\boost\boost_1_38\boost\archive\detail\oserializer.hpp(236) : see reference to class template instantiation 'boost::archive::detail::oserializer ' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=Storage::Frame 1> ] 1> c:\program files\boost\boost_1_38\boost\archive\detail\oserializer.hpp(230) : while compiling class template member function 'void boost::archive::detail::save_non_pointer_type ::save_standard::invoke(Archive &,const Storage::Frame &)' 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=Storage::Frame 1> ] 1> c:\program files\boost\boost_1_38\boost\archive\detail\oserializer.hpp(294) : see reference to class template instantiation 'boost::archive::detail::save_non_pointer_type ::save_standard' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=Storage::Frame 1> ] 1> c:\program files\boost\boost_1_38\boost\archive\detail\oserializer.hpp(282) : while compiling class template member function 'void boost::archive::detail::save_non_pointer_type ::invoke(Archive &,const Storage::Frame &)' 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=Storage::Frame 1> ] 1> c:\program files\boost\boost_1_38\boost\archive\detail\oserializer.hpp(506) : see reference to class template instantiation 'boost::archive::detail::save_non_pointer_type ' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=Storage::Frame 1> ] 1> c:\program files\boost\boost_1_38\boost\archive\detail\common_oarchive.hpp(64) : see reference to function template instantiation 'void boost::archive::save (Archive &,const T &)' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=const Storage::Frame 1> ] 1> c:\program files\boost\boost_1_38\boost\archive\basic_binary_oarchive.hpp(63) : 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=const Storage::Frame 1> ] 1> c:\program files\boost\boost_1_38\boost\archive\binary_oarchive_impl.hpp(45) : see reference to function template instantiation 'void boost::archive::basic_binary_oarchive<Archive>::save_override<const T>(const T &,int)' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=const Storage::Frame 1> ] 1> c:\program files\boost\boost_1_38\boost\archive\detail\interface_oarchive.hpp(64) : see reference to function template instantiation 'void boost::archive::binary_oarchive_impl ::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=const Storage::Frame 1> ] 1> c:\src\storagetest\storagetest\videostorage.cpp(73) : see reference to function template instantiation 'Archive &boost::archive::detail::interface_oarchive<Archive>::operator <<<const Storage::Frame>(T &)' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=const Storage::Frame 1> ] 1>c:\src\storagetest\storagetest\videostorage.h(67) : error C2679: binary '&' : no operator found which takes a right-hand operand of type 'Storage::FileSize' (or there is no acceptable conversion) 1> c:\program files\boost\boost_1_38\boost\archive\detail\interface_oarchive.hpp(70): could be 'Archive &boost::archive::detail::interface_oarchive<Archive>::operator &Storage::FileSize(T &)' 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=Storage::FileSize 1> ] 1> while trying to match the argument list '(boost::archive::binary_oarchive, Storage::FileSize)' _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
The library already has serialization implemented for
boost::int64_t
which would be more portable. Maybe you want to try this.
Robert Ramey
"Rune Lund Olesen"
participants (4)
-
Robert Ramey
-
Rune Lund Olesen
-
Sandy Walsh
-
Steven Watanabe