June 2005 - Boost-users - lists.preview.boost.org

Using minimal boost header files.
by Junkeh 10 Jun '05

10 Jun '05

Dear Sirs/Madams, I would like to be able to use some of the features of the boost library but only a very tiny portion of them! May I ask whether it is possible to do this and therefore distribute much less than 17Mbs worth of mostly unused code? Yours, Dan.

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Serialization of heterogeneous sequence using shared_ptr<void>
by Sean Kelly 10 Jun '05

10 Jun '05

Dear All, I'm trying to figure out if something like the below is possible with the serialization library. The idea is to serialize a heterogeneous sequence using shared_pointer<void>. thanks for any help Sean void hetero_sequence() { // create and open a character archive for output std::ofstream ofs("dictionary.pickle"); boost::archive::text_oarchive oa(ofs); std::deque<boost::shared_ptr<void> > sequence; sequence.push_back(boost::shared_ptr<string>(new string("random string"))); sequence.push_back(boost::shared_ptr<double>(new double(3.1415627))); sequence.push_back(boost::shared_ptr<bool>(new bool(false))); // write class instance to archive oa << sequence; // close archive ofs.close(); }

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boost/limits.hpp and GCC 3.2.3
by Dave Steffen 10 Jun '05

10 Jun '05

Folks, It looks to me like numeric_limits on GCC 3.2.3 is broken; specifically, numeric_limits<double>::has_infinity = false numeric_limits<double>::infinity() == 0 I suspect boost/limits.hpp could fix this if it knew to do so; but since <limits> exists, boost/limits.hpp doesn't 'fix' anything. Does anyone have thoughts about (reasonably portable) ways to "convince" boost/limits.hpp to provide numeric_limits even if the compiler already has one? Thanks! ---------------------------------------------------------------------- Dave Steffen, Ph.D. "There are two ways to write error-free Software Engineer IV programs; only the third one works." Numerica Corporation ph (970) 419-8343 x27 "Pie are not square. Pie are round. fax (970) 223-6797 Cornbread are square" dgsteffen(a)numerica.us ... anon (usenet)

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Boost.Serialization and Pointers to Objects of Derived Classes
by Richard Jennings 10 Jun '05

10 Jun '05

I am using Boost 1.32.0 with Borland C++ Builder 6 and attempting to serialize an object via a pointer to a base class but I am getting a runtime exception of "unregistered void cast". Having read the page in the documentation on Runtime Casting, I thought I should be able to use boost::serialization::void_cast_register<Base, Derived>(0,0); to associate the base and derived classes, but I can't get it to work. If I use the alternate method (to serialize the base class and provide a do-nothing serialize method in the base class) then it works fine. Any ideas what's wrong? The program below demonstrates the problem. Class A uses the serialize base class method and that's ok while class B uses the void_cast_register method and an exception is thrown when it's serialized: ----- #include <iostream> #include <boost/filesystem/fstream.hpp> #include <boost/filesystem/path.hpp> #include <boost/archive/xml_oarchive.hpp> #include <boost/serialization/export.hpp> #include <boost/serialization/base_object.hpp> #if defined(_DEBUG) # pragma link "libboost_serialization-bcb-mt-d-1_32.lib" #else # pragma link "libboost_serialization-bcb-mt-1_32.lib" #endif class Base_c { public: virtual void SomeMethod() = 0; private: friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version) {} }; BOOST_IS_ABSTRACT(Base_c) class A : public Base_c { public: A() : m_Id("A"){}; void SomeMethod(){}; private: friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version) { /* boost::serialization::void_cast_register<Base_c, A>(0,0); */ ar & boost::serialization::make_nvp("Base", boost::serialization::base_object<Base_c>(*this)); ar & BOOST_SERIALIZATION_NVP(m_Id); } std::string const m_Id; }; BOOST_CLASS_EXPORT(A); class B : public Base_c { public: B() : m_Id("B"){}; void SomeMethod(){}; private: friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version) { boost::serialization::void_cast_register<Base_c, B>(0,0); /* ar & boost::serialization::make_nvp("Base", boost::serialization::base_object<Base_c>(*this)); */ ar & BOOST_SERIALIZATION_NVP(m_Id); } std::string const m_Id; }; BOOST_CLASS_EXPORT(B) main(int, char**) { boost::filesystem::ofstream OfStream(boost::filesystem::path("D:\\Temp\\SerialisationText.xml", boost::filesystem::native)); boost::archive::xml_oarchive Archive(OfStream); try { Base_c *pBase, *pBase2; pBase = new A(); pBase2 = new B(); Archive & boost::serialization::make_nvp("AByBasePointer", pBase); std::cout << "Serialised A ok\n"; Archive & boost::serialization::make_nvp("BByBasePointer", pBase2); std::cout << "Serialised B ok\n"; } catch (std::exception& E) { std::cout << "Exception: " << E.what(); } } ----- The output is: Serialised A ok Exception: unregistered void cast

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Boost.Serialization 1.32 trouble reading back an object first serialized in an std::vector then by pointer
by James Conrad 10 Jun '05

10 Jun '05

I'm evaluating the Boost.Serialization for use internal use as an interchange format between a number of loose knit projects, and I've run into a bit of trouble. I'm using Vc 7.1 in Visual Studio .NET 2003. It seems to me that, if I serialize an object first in an std::vector, and then serialize it later by pointer, that there is trouble reading it back. I boiled down the reproduction case to as little code as possible below. When newPolygon (below) is loaded from the archive, I get a bogus pointer for m_pLastVertex. If I serialize using a binary archive, I hit an assert in basic_iarchive.cpp line 371: assert(new_cid == cid); Where cid is 576 and new_cid is 2. Any help with this would be appriciated, Thanks in advance, -james conrad #include <fstream> #define BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP #include <boost/archive/xml_oarchive.hpp> #include <boost/archive/xml_iarchive.hpp> #include <boost/serialization/vector.hpp> #include <boost/serialization/export.hpp> class Vector3 { public: Vector3() {} Vector3( float x, float y, float z ) : _x(x), _y(y), _z(z) {} friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & BOOST_SERIALIZATION_NVP(_x); ar & BOOST_SERIALIZATION_NVP(_y); ar & BOOST_SERIALIZATION_NVP(_z); } float _x,_y,_z; }; BOOST_CLASS_EXPORT_GUID(Vector3, "Vector3") class Polygon { public: Polygon() : m_pLastVertex( NULL ) {} friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & BOOST_SERIALIZATION_NVP(m_vertices); ar & BOOST_SERIALIZATION_NVP(m_pLastVertex); } void addVertex( const Vector3& vert ) { m_vertices.push_back( vert ); m_pLastVertex = &m_vertices.back(); } std::vector<Vector3> m_vertices; Vector3* m_pLastVertex; }; BOOST_CLASS_EXPORT_GUID(Polygon, "Polygon") int main( int argc, char* argv[] ) { // create class instance Polygon poly; poly.addVertex( Vector3( 0.0f, 1.0f, 0.0f ) ); poly.addVertex( Vector3( 1.0f, 0.12565f, 0.2f ) ); poly.addVertex( Vector3( 15.0f, 1.22f, 6.7f ) ); poly.addVertex( Vector3( 1.43f, 1.55f, 2.5f ) ); // create and open a character archive for output std::ofstream ofsx( "testout.xml" ); boost::archive::xml_oarchive oax( ofsx ); // write class instance to archive oax << BOOST_SERIALIZATION_NVP(poly); // close archive ofsx.close(); Polygon newPoly; // create and open an archive for input std::ifstream ifs("testout.xml", std::ios::binary); boost::archive::xml_iarchive ia(ifs); // read class state from archive ia >> BOOST_SERIALIZATION_NVP( newPoly ); // close archive ifs.close(); return 0; } Here is an example of the .xml output: <?xml version="1.0" encoding="UTF-8" standalone="yes" ?> <!DOCTYPE boost_serialization> <boost_serialization signature="serialization::archive" version="3"> <poly class_id="0" tracking_level="1" version="0" object_id="_0"> <m_vertices class_id="1" tracking_level="0" version="0"> <count>4</count> <item class_id="2" tracking_level="1" version="0" object_id="_1"> <_x>0</_x> <_y>1</_y> <_z>0</_z> </item> <item object_id="_2"> <_x>1</_x> <_y>0.12565</_y> <_z>0.2</_z> </item> <item object_id="_3"> <_x>15</_x> <_y>1.22</_y> <_z>6.6999998</_z> </item> <item object_id="_4"> <_x>1.4299999</_x> <_y>1.55</_y> <_z>2.5</_z> </item> </m_vertices> <m_pLastVertex class_id_reference="2" object_id_reference="_4"></m_pLastVertex> </poly>

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Re: Re: [Boost-users] Error Linking A Simple Application using
by Dinesh Pillay 10 Jun '05

10 Jun '05

Hi, It still does not link, even when I tried the two commands you posted. I'm at a loss here, I just don't understand the nature of the error. Regards, Dinesh. Message: 3 Date: Wed, 8 Jun 2005 18:08:32 -0400 From: Caleb Epstein <caleb.epstein(a)gmail.com> Subject: Re: [Boost-users] Error Linking A Simple Application using Boost.Any To: boost-users(a)lists.boost.org Message-ID: <989aceac050608150830caa3e7(a)mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 On 6/7/05, Dinesh Pillay <dpillay(a)gmail.com> wrote: > >g++ -IC:\Boost\include\boost-1_32 -pedantic -s -O3 -fno-exceptions -c > boost_trial.cpp -o boost_trial.o > > But when I try to link the file using: > g++ -IC:\Boost\include\boost-1_32 boost_trial.cpp -o boost_trial.exe > > I get the following errors: > > /mingw/lib/libstdc++.a(eh_personality.o)(.data$_ZTISt9exception[typeinfo > for std::exception]+0x0): multiple definition of `typeinfo for > std::exception' > C:\DOCUME~1\dpilla\LOCALS~1\Temp/ccoBaaaa.o(.rdata$_ZTISt9exception[typeinfo > for std::exception]+0x0):boost_trial.cpp: first defined here > /mingw/lib/libstdc++.a(eh_personality.o)(.text$_ZTSSt9exception[typeinfo > name for std::exception]+0x0): multiple definition of `typeinfo name > for std::exception' > C:\DOCUME~1\dpilla\LOCALS~1\Temp/ccoBaaaa.o(.rdata$_ZTSSt9exception[typeinfo > name for std::exception]+0x0):boost_trial.cpp: first defined here > /mingw/lib/libstdc++.a(functexcept.o)(.data$_ZTISt8bad_cast[typeinfo > for std::bad_cast]+0x0): multiple definition of `typeinfo for > std::bad_cast' > C:\DOCUME~1\dpilla\LOCALS~1\Temp/ccoBaaaa.o(.rdata$_ZTISt8bad_cast[typeinfo > for std::bad_cast]+0x0):boost_trial.cpp: first defined here > /mingw/lib/libstdc++.a(functexcept.o)(.text$_ZTSSt8bad_cast[typeinfo > name for std::bad_cast]+0x0): multiple definition of `typeinfo name > for std::bad_cast' > C:\DOCUME~1\dpilla\LOCALS~1\Temp/ccoBaaaa.o(.rdata$_ZTSSt8bad_cast[typeinfo > name for std::bad_cast]+0x0):boost_trial.cpp: first defined here > collect2: ld returned 1 exit status > > I have no idea why this is happening! What am I doing wrong? Somebody > please tell me the right way to link the file. > >> I suspect the problem is you have disabled exceptions >> (-fno-exceptions). Are you doing this for any particular reason? >> Also, why are you stripping your object files (-s in the compile >> line)? Hopefully gcc is ignoring this, but this may also be the cause >> of your grief. >> g++ -Ic:/boost/include/boost-1_32 -O3 -c boost_trial.cpp >> g++ -s -o boost_trial.exe boost_trial.o >> -- >> Caleb Epstein >> caleb dot epstein at gmail dot com

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RE: [Boost-users] Re: Boost.Serialization 1.32 trouble reading backanobject first serialized in an std::vector then by pointer
by Yan Zhang 09 Jun '05

09 Jun '05

It strikes me that you can serialize the object and the address to it and then deserialize the object and the address which now points to the deserialized object. I used MFC serialization and I remembered that you cannot do it. Do I misunderstand something here? Yan -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Robert Ramey Sent: Wednesday, June 08, 2005 8:51 PM To: boost-users(a)lists.boost.org Subject: [Boost-users] Re: Boost.Serialization 1.32 trouble reading backanobject first serialized in an std::vector then by pointer It just occured to me that this is an old problem which has now been fixed in the CVS. The problem occurs with version 1.32 when addresses of objects are stored in containers. The problem occurs because objects are deserialized to a temporary and then moved into the container. This has been addressed by adding the function reset_object_address calling it during the deserialzation. This is explained in the CVS version. Robert Ramey Robert Ramey wrote: > I'll look at this. Give me a couple of days. > > Robert Ramey > > James Conrad wrote: >> I'm evaluating the Boost.Serialization for use internal use as an >> interchange format between a number of loose knit projects, and I've >> run into a bit of trouble. >> >> I'm using Vc 7.1 in Visual Studio .NET 2003. >> >> It seems to me that, if I serialize an object first in an >> std::vector, and then serialize it later by pointer, that there is >> trouble reading it back. >> >> I boiled down the reproduction case to as little code as possible >> below. >> >> When newPolygon (below) is loaded from the archive, I get a bogus >> pointer for m_pLastVertex. If I serialize using a binary archive, I >> hit an assert in basic_iarchive.cpp line 371: >> >> assert(new_cid == cid); >> >> Where cid is 576 and new_cid is 2. >> >> Any help with this would be appriciated, >> >> Thanks in advance, >> -james conrad >> >> >> #include <fstream> >> >> #define BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP >> >> #include <boost/archive/xml_oarchive.hpp> >> #include <boost/archive/xml_iarchive.hpp> >> >> #include <boost/serialization/vector.hpp> >> #include <boost/serialization/export.hpp> >> >> class Vector3 >> { >> public: >> Vector3() {} >> Vector3( float x, float y, float z ) : _x(x), _y(y), _z(z) {} >> >> friend class boost::serialization::access; >> template<class Archive> >> void serialize(Archive & ar, const unsigned int version) >> { >> ar & BOOST_SERIALIZATION_NVP(_x); >> ar & BOOST_SERIALIZATION_NVP(_y); >> ar & BOOST_SERIALIZATION_NVP(_z); >> } >> >> float _x,_y,_z; >> }; >> >> BOOST_CLASS_EXPORT_GUID(Vector3, "Vector3") >> >> class Polygon >> { >> public: >> Polygon() : m_pLastVertex( NULL ) {} >> >> friend class boost::serialization::access; >> template<class Archive> >> void serialize(Archive & ar, const unsigned int version) >> { >> ar & BOOST_SERIALIZATION_NVP(m_vertices); >> ar & BOOST_SERIALIZATION_NVP(m_pLastVertex); >> } >> >> void addVertex( const Vector3& vert ) >> { >> m_vertices.push_back( vert ); >> m_pLastVertex = &m_vertices.back(); >> } >> >> std::vector<Vector3> m_vertices; >> Vector3* m_pLastVertex; >> }; >> >> BOOST_CLASS_EXPORT_GUID(Polygon, "Polygon") >> >> int main( int argc, char* argv[] ) >> { >> // create class instance >> Polygon poly; >> poly.addVertex( Vector3( 0.0f, 1.0f, 0.0f ) ); >> poly.addVertex( Vector3( 1.0f, 0.12565f, 0.2f ) ); >> poly.addVertex( Vector3( 15.0f, 1.22f, 6.7f ) ); >> poly.addVertex( Vector3( 1.43f, 1.55f, 2.5f ) ); >> >> // create and open a character archive for output >> std::ofstream ofsx( "testout.xml" ); >> boost::archive::xml_oarchive oax( ofsx ); >> >> // write class instance to archive >> oax << BOOST_SERIALIZATION_NVP(poly); >> >> // close archive >> ofsx.close(); >> >> Polygon newPoly; >> >> // create and open an archive for input >> std::ifstream ifs("testout.xml", std::ios::binary); >> boost::archive::xml_iarchive ia(ifs); >> // read class state from archive >> ia >> BOOST_SERIALIZATION_NVP( newPoly ); >> // close archive >> ifs.close(); >> >> return 0; >> } >> >> >> Here is an example of the .xml output: >> >> <?xml version="1.0" encoding="UTF-8" standalone="yes" ?> >> <!DOCTYPE boost_serialization> >> <boost_serialization signature="serialization::archive" version="3"> >> <poly class_id="0" tracking_level="1" version="0" object_id="_0"> >> <m_vertices class_id="1" tracking_level="0" version="0"> >> <count>4</count> >> <item class_id="2" tracking_level="1" version="0" >> object_id="_1"> <_x>0</_x> >> <_y>1</_y> >> <_z>0</_z> >> </item> >> <item object_id="_2"> >> <_x>1</_x> >> <_y>0.12565</_y> >> <_z>0.2</_z> >> </item> >> <item object_id="_3"> >> <_x>15</_x> >> <_y>1.22</_y> >> <_z>6.6999998</_z> >> </item> >> <item object_id="_4"> >> <_x>1.4299999</_x> >> <_y>1.55</_y> >> <_z>2.5</_z> >> </item> >> </m_vertices> >> <m_pLastVertex class_id_reference="2" >> object_id_reference="_4"></m_pLastVertex> >> </poly> _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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Serialization - no & operator for primitives
by Marcin Tustin 09 Jun '05

09 Jun '05

I'm using a recent (a few days old) cvs version of boost, and the serialization libraries, and Visual Studio 7.1 is producing the error below. This is only happening to classes which I am exporting (like BOOST_CLASS_EXPORT_GUID(D2::Message,"D2::Message");). The reason I am exporting them is that they are in many cases a) subclasses of each other b) accessed through a pointer. Any help would be deeply appreciated. My code is: template<class Archive > static void serialize(Archive & ar, D2::Message& g, const unsigned int version) { ar & g.getType(); // an int - error complains about this line. ar & g.getSender(); // a string ar & g.getMessage(); // a string } Error message: c:\D2\API\NewClient\EnhancedMessageHandler.h(132) : error C2679: binary '&' : no operator found which takes a right-hand operand of type 'uint32' (or there is no acceptable conversion) C:\boost\boost-cvs-20050606\boost\boost\serialization\serialization.hpp( 140) : see reference to function template instantiation 'void boost::serialization::serialize<Archive>(Archive &,D2::Message &,const unsigned int)' being compiled with [ Archive=boost::archive::detail::export_impl::for_each_archive<boost::arc hive::detail::export_impl::for_each_archive<boost::archive::detail::know n_archive_types::type,IplJrsMediaTimePoint>::tail,IplJrsMediaTimePoint>: :head ] C:\boost\boost-cvs-20050606\boost\boost\archive\detail\iserializer.hpp(1 61) : see reference to function template instantiation 'void boost::serialization::serialize_adl<Archive,T>(Archive &,T &,const unsigned int)' being compiled with [ Archive=boost::archive::detail::export_impl::for_each_archive<boost::arc hive::detail::export_impl::for_each_archive<boost::archive::detail::know n_archive_types::type,IplJrsMediaTimePoint>::tail,IplJrsMediaTimePoint>: :head, T=D2::Message ] C:\boost\boost-cvs-20050606\boost\boost\serialization\extended_type_info _typeid.hpp(71) : while compiling class-template member function 'void boost::archive::detail::iserializer<Archive,T>::load_object_data(boost:: archive::detail::basic_iarchive &,void *,const unsigned int) const' with [ Archive=boost::archive::detail::export_impl::for_each_archive<boost::arc hive::detail::export_impl::for_each_archive<boost::archive::detail::know n_archive_types::type,D2::Message>::tail,D2::Message>::head, T=D2::Message ] C:\boost\boost-cvs-20050606\boost\boost\archive\detail\iserializer.hpp(1 72) : see reference to class template instantiation 'boost::archive::detail::iserializer<Archive,T>' being compiled with [ Archive=boost::archive::detail::export_impl::for_each_archive<boost::arc hive::detail::export_impl::for_each_archive<boost::archive::detail::know n_archive_types::type,D2::Message>::tail,D2::Message>::head, T=D2::Message ] C:\boost\boost-cvs-20050606\boost\boost\archive\detail\iserializer.hpp(1 71) : while compiling class-template member function 'const boost::archive::detail::basic_iserializer &boost::archive::detail::pointer_iserializer<T,Archive>::get_basic_seria lizer(void) const' with [ T=D2::Message, Archive=boost::archive::detail::export_impl::for_each_archive<boost::arc hive::detail::export_impl::for_each_archive<boost::archive::detail::know n_archive_types::type,D2::Message>::tail,D2::Message>::head ] C:\boost\boost-cvs-20050606\boost\boost\archive\detail\iserializer.hpp(5 01) : see reference to class template instantiation 'boost::archive::detail::pointer_iserializer<T,Archive>' being compiled with [ T=D2::Message, Archive=boost::archive::detail::export_impl::for_each_archive<boost::arc hive::detail::export_impl::for_each_archive<boost::archive::detail::know n_archive_types::type,D2::Message>::tail,D2::Message>::head ] C:\boost\boost-cvs-20050606\boost\boost\serialization\export.hpp(78) : see reference to function template instantiation 'const boost::archive::detail::basic_pointer_iserializer &boost::archive::detail::instantiate_pointer_iserializer<Archive,T>(Arch ive *,T *)' being compiled with [ Archive=boost::archive::detail::export_impl::for_each_archive<boost::arc hive::detail::export_impl::for_each_archive<boost::archive::detail::know n_archive_types::type,D2::Message>::tail,D2::Message>::head, T=D2::Message ] C:\boost\boost-cvs-20050606\boost\boost\serialization\export.hpp(74) : while compiling class-template member function 'void boost::archive::detail::export_impl::archive<Archive,T>::i::invoke(void) ' with [ Archive=boost::archive::detail::export_impl::for_each_archive<boost::arc hive::detail::export_impl::for_each_archive<boost::archive::detail::know n_archive_types::type,D2::Message>::tail,D2::Message>::head, T=D2::Message ] C:\boost\boost-cvs-20050606\boost\boost\serialization\export.hpp(105) : see reference to class template instantiation 'boost::archive::detail::export_impl::archive<Archive,T>::i' being compiled with [ Archive=boost::archive::detail::export_impl::for_each_archive<boost::arc hive::detail::export_impl::for_each_archive<boost::archive::detail::know n_archive_types::type,D2::Message>::tail,D2::Message>::head, T=D2::Message ] C:\boost\boost-cvs-20050606\boost\boost\serialization\export.hpp(89) : while compiling class-template member function 'void boost::archive::detail::export_impl::archive<Archive,T>::instantiate(voi d)' with [ Archive=boost::archive::detail::export_impl::for_each_archive<boost::arc hive::detail::export_impl::for_each_archive<boost::archive::detail::know n_archive_types::type,D2::Message>::tail,D2::Message>::head, T=D2::Message ] C:\boost\boost-cvs-20050606\boost\boost\serialization\export.hpp(116) : see reference to class template instantiation 'boost::archive::detail::export_impl::archive<Archive,T>' being compiled with [ Archive=boost::archive::detail::export_impl::for_each_archive<boost::arc hive::detail::export_impl::for_each_archive<boost::archive::detail::know n_archive_types::type,D2::Message>::tail,D2::Message>::head, T=D2::Message ] C:\boost\boost-cvs-20050606\boost\boost\serialization\export.hpp(115) : while compiling class-template member function 'void boost::archive::detail::export_impl::for_each_archive<ASeq,T>::instantia te(void)' with [ ASeq=boost::archive::detail::export_impl::for_each_archive<boost::archiv e::detail::known_archive_types::type,D2::Message>::tail, T=D2::Message ] C:\boost\boost-cvs-20050606\boost\boost\serialization\export.hpp(122) : see reference to class template instantiation 'boost::archive::detail::export_impl::for_each_archive<ASeq,T>' being compiled with [ ASeq=boost::archive::detail::export_impl::for_each_archive<boost::archiv e::detail::known_archive_types::type,D2::Message>::tail, T=D2::Message ] Marcin Tustin IT Innovation Centre 2 Venture Road Chilworth Science Park Southampton, SO16 7NP, UK tel: +44 23 8076 0834 fax: +44 23 8076 0833 mailto:mt@it-innovation.soton.ac.uk http://www.it-innovation.soton.ac.uk

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RE: [Boost-users] Re: Boost.Serialization 1.32 trouble reading ba ck an object first serialized in an std::vector then by pointer
by Olivier Vanden Bos 09 Jun '05

09 Jun '05

What is BOOST_SERIALIZATION_NVP ? I use a lot the serialization with all STL containers possible and much more complex example than that, i have no pb... (perhaps too complex for the Vc7.1 compiler..) But i never use this macro.... - VDB - "LNK1210: exceeded internal ILK size limit" -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Robert Ramey Sent: 8 juin 2005 12:39 To: boost-users(a)lists.boost.org Subject: [Boost-users] Re: Boost.Serialization 1.32 trouble reading back an object first serialized in an std::vector then by pointer I'll look at this. Give me a couple of days. Robert Ramey James Conrad wrote: > I'm evaluating the Boost.Serialization for use internal use as an > interchange format between a number of loose knit projects, and I've > run into a bit of trouble. > > I'm using Vc 7.1 in Visual Studio .NET 2003. > > It seems to me that, if I serialize an object first in an std::vector, > and then serialize it later by pointer, that there is trouble reading > it back. > > I boiled down the reproduction case to as little code as possible > below. > > When newPolygon (below) is loaded from the archive, I get a bogus > pointer for m_pLastVertex. If I serialize using a binary archive, I > hit an assert in basic_iarchive.cpp line 371: > > assert(new_cid == cid); > > Where cid is 576 and new_cid is 2. > > Any help with this would be appriciated, > > Thanks in advance, > -james conrad > > > #include <fstream> > > #define BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP > > #include <boost/archive/xml_oarchive.hpp> > #include <boost/archive/xml_iarchive.hpp> > > #include <boost/serialization/vector.hpp> > #include <boost/serialization/export.hpp> > > class Vector3 > { > public: > Vector3() {} > Vector3( float x, float y, float z ) : _x(x), _y(y), _z(z) {} > > friend class boost::serialization::access; > template<class Archive> > void serialize(Archive & ar, const unsigned int version) > { > ar & BOOST_SERIALIZATION_NVP(_x); > ar & BOOST_SERIALIZATION_NVP(_y); > ar & BOOST_SERIALIZATION_NVP(_z); > } > > float _x,_y,_z; > }; > > BOOST_CLASS_EXPORT_GUID(Vector3, "Vector3") > > class Polygon > { > public: > Polygon() : m_pLastVertex( NULL ) {} > > friend class boost::serialization::access; > template<class Archive> > void serialize(Archive & ar, const unsigned int version) > { > ar & BOOST_SERIALIZATION_NVP(m_vertices); > ar & BOOST_SERIALIZATION_NVP(m_pLastVertex); > } > > void addVertex( const Vector3& vert ) > { > m_vertices.push_back( vert ); > m_pLastVertex = &m_vertices.back(); > } > > std::vector<Vector3> m_vertices; > Vector3* m_pLastVertex; > }; > > BOOST_CLASS_EXPORT_GUID(Polygon, "Polygon") > > int main( int argc, char* argv[] ) > { > // create class instance > Polygon poly; > poly.addVertex( Vector3( 0.0f, 1.0f, 0.0f ) ); > poly.addVertex( Vector3( 1.0f, 0.12565f, 0.2f ) ); > poly.addVertex( Vector3( 15.0f, 1.22f, 6.7f ) ); > poly.addVertex( Vector3( 1.43f, 1.55f, 2.5f ) ); > > // create and open a character archive for output > std::ofstream ofsx( "testout.xml" ); > boost::archive::xml_oarchive oax( ofsx ); > > // write class instance to archive > oax << BOOST_SERIALIZATION_NVP(poly); > > // close archive > ofsx.close(); > > Polygon newPoly; > > // create and open an archive for input > std::ifstream ifs("testout.xml", std::ios::binary); > boost::archive::xml_iarchive ia(ifs); > // read class state from archive > ia >> BOOST_SERIALIZATION_NVP( newPoly ); > // close archive > ifs.close(); > > return 0; > } > > > Here is an example of the .xml output: > > <?xml version="1.0" encoding="UTF-8" standalone="yes" ?> > <!DOCTYPE boost_serialization> > <boost_serialization signature="serialization::archive" version="3"> > <poly class_id="0" tracking_level="1" version="0" object_id="_0"> > <m_vertices class_id="1" tracking_level="0" version="0"> > <count>4</count> > <item class_id="2" tracking_level="1" version="0" > object_id="_1"> <_x>0</_x> > <_y>1</_y> > <_z>0</_z> > </item> > <item object_id="_2"> > <_x>1</_x> > <_y>0.12565</_y> > <_z>0.2</_z> > </item> > <item object_id="_3"> > <_x>15</_x> > <_y>1.22</_y> > <_z>6.6999998</_z> > </item> > <item object_id="_4"> > <_x>1.4299999</_x> > <_y>1.55</_y> > <_z>2.5</_z> > </item> > </m_vertices> > <m_pLastVertex class_id_reference="2" > object_id_reference="_4"></m_pLastVertex> > </poly> _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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Error Linking A Simple Application using Boost.Any
by Dinesh Pillay 08 Jun '05

08 Jun '05

Hello all, I'm really new to boost and I tried compiling and then linking the following program : #include <iostream> #include <boost/any.hpp> int main() { boost::any a = 8; int var = boost::any_cast<int>(a); std::cout << var << std::endl; system("pause"); return 0; } I am able to compile the file with the command: >g++ -IC:\Boost\include\boost-1_32 -pedantic -s -O3 -fno-exceptions -c boost_trial.cpp -o boost_trial.o But when I try to link the file using: g++ -IC:\Boost\include\boost-1_32 boost_trial.cpp -o boost_trial.exe I get the following errors: /mingw/lib/libstdc++.a(eh_personality.o)(.data$_ZTISt9exception[typeinfo for std::exception]+0x0): multiple definition of `typeinfo for std::exception' C:\DOCUME~1\dpilla\LOCALS~1\Temp/ccoBaaaa.o(.rdata$_ZTISt9exception[typeinfo for std::exception]+0x0):boost_trial.cpp: first defined here /mingw/lib/libstdc++.a(eh_personality.o)(.text$_ZTSSt9exception[typeinfo name for std::exception]+0x0): multiple definition of `typeinfo name for std::exception' C:\DOCUME~1\dpilla\LOCALS~1\Temp/ccoBaaaa.o(.rdata$_ZTSSt9exception[typeinfo name for std::exception]+0x0):boost_trial.cpp: first defined here /mingw/lib/libstdc++.a(functexcept.o)(.data$_ZTISt8bad_cast[typeinfo for std::bad_cast]+0x0): multiple definition of `typeinfo for std::bad_cast' C:\DOCUME~1\dpilla\LOCALS~1\Temp/ccoBaaaa.o(.rdata$_ZTISt8bad_cast[typeinfo for std::bad_cast]+0x0):boost_trial.cpp: first defined here /mingw/lib/libstdc++.a(functexcept.o)(.text$_ZTSSt8bad_cast[typeinfo name for std::bad_cast]+0x0): multiple definition of `typeinfo name for std::bad_cast' C:\DOCUME~1\dpilla\LOCALS~1\Temp/ccoBaaaa.o(.rdata$_ZTSSt8bad_cast[typeinfo name for std::bad_cast]+0x0):boost_trial.cpp: first defined here collect2: ld returned 1 exit status I have no idea why this is happening! What am I doing wrong? Somebody please tell me the right way to link the file. Thanks a million. Regards, Dinesh Pillay. -- - Perfection or Nothing.

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