Hi, Matthias Troyer-2 wrote:

You should not have to define your class as a wrapper. Can you send the code fragment that causes the problem?

Matthias _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

here are the code segments that cause the problem: As you see in the last message, there are errors in RemoteMessagingSystem.cpp:147 and RemoteMessagingSystem.cpp:147. They are the following 2 functions which serializes the obj Message to xml archive and deserializes xml archive backwards to obj Message. string RemoteMessagingSystem::serialize (Message* msg) { stringstream archiveStream (ios_base::binary | ios_base::out); { #ifdef REMOTE_XML boost::archive::xml_oarchive outputArchive( archiveStream ); #else boost::archive::binary_oarchive outputArchive( archiveStream ); #endif //REMOTE_XML outputArchive & msg; //line 147 } string data = archiveStream.str(); return data; } Message* RemoteMessagingSystem::deserialize (string data) { stringstream archivStream (data, ios_base::binary | ios_base::in); #ifdef REMOTE_XML boost::archive::xml_iarchive inputArchive( archivStream ); #else boost::archive::binary_iarchive inputArchive( archivStream ); #endif Message* msg = NULL; inputArchive >> msg; // line 164 return msg; } Regards, Binh -- View this message in context: http://old.nabble.com/Problem-with-Boost-Serialization-tp27743377p27762759.h... Sent from the Boost - Users mailing list archive at Nabble.com.

Hi, thank you very much for your answer. I was stuck with this problem for days. I have changed the code so that a const pointer is now passed to the RemoteMessagingSystem::serialize: string RemoteMessagingSystem::serialize (Message* const msg) { ... } But the problem with deserialize is still there: In file included from /home/v0d0i/libraries/boost_1_42_0/include/boost/archive/xml_iarchive.hpp:24, from message/remote/RemoteMessagingSystem.h:31, from message/remote/RemoteMessagingSystem.cpp:1: /home/v0d0i/libraries/boost_1_42_0/include/boost/archive/basic_xml_iarchive.hpp: In member function ‘void boost::archive::basic_xml_iarchive<Archive>::load_override(T&, int) [with T = Message*, Archive = boost::archive::xml_iarchive]’: /home/v0d0i/libraries/boost_1_42_0/include/boost/archive/xml_iarchive.hpp:80: instantiated from ‘void boost::archive::xml_iarchive_impl<Archive>::load_override(T&, int) [with T = Message*, Archive = boost::archive::xml_iarchive]’ /home/v0d0i/libraries/boost_1_42_0/include/boost/archive/detail/interface_iarchive.hpp:61: instantiated from ‘Archive& boost::archive::detail::interface_iarchive<Archive>::operator>>(T&) [with T = Message*, Archive = boost::archive::xml_iarchive]’ message/remote/RemoteMessagingSystem.cpp:164: instantiated from here /home/v0d0i/libraries/boost_1_42_0/include/boost/archive/basic_xml_iarchive.hpp:70: error: no matching function for call to ‘assertion_failed(mpl_::failed************ boost::serialization::is_wrapper::************)’ make[1]: *** [RemoteMessagingSystem.o] Error 1 make[1]: Leaving directory `/home/v0d0i/workspace/trunk1/src/base' make: *** [all-recursive] Error 1 Here is the code fragement: Message* RemoteMessagingSystem::deserialize (string data) { stringstream archivStream (data, ios_base::binary | ios_base::in); #ifdef REMOTE_XML boost::archive::xml_iarchive inputArchive( archivStream ); #else boost::archive::binary_iarchive inputArchive( archivStream ); #endif Message* msg = NULL; //line 164 inputArchive >> msg; return msg; } Should I also change here Message* to Message* const? Actually it is something strange because with the old versoin Boost 1.38 there are no compiling errors. Since i compiled and installed the new version 1.42 i got those errors. Something should be changed between the 2 versions although i have compared the both source codes but do not find any difference :/ Regards, Binh Matthias Troyer-2 wrote:

On 3 Mar 2010, at 00:44, Binh Luong wrote:

...

Hi,

Matthias Troyer-2 wrote:

...

You should not have to define your class as a wrapper. Can you send the code fragment that causes the problem?

Matthias _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

here are the code segments that cause the problem: As you see in the last message, there are errors in RemoteMessagingSystem.cpp:147 and RemoteMessagingSystem.cpp:147. They are the following 2 functions which serializes the obj Message to xml archive and deserializes xml archive backwards to obj Message.

string RemoteMessagingSystem::serialize (Message* msg) { stringstream archiveStream (ios_base::binary | ios_base::out); { #ifdef REMOTE_XML boost::archive::xml_oarchive outputArchive( archiveStream ); #else boost::archive::binary_oarchive outputArchive( archiveStream ); #endif //REMOTE_XML outputArchive & msg; //line 147 }

string data = archiveStream.str(); return data; }

Message* RemoteMessagingSystem::deserialize (string data) { stringstream archivStream (data, ios_base::binary | ios_base::in); #ifdef REMOTE_XML boost::archive::xml_iarchive inputArchive( archivStream ); #else boost::archive::binary_iarchive inputArchive( archivStream ); #endif

Message* msg = NULL; inputArchive >> msg; // line 164

return msg; }

Two things:

1.) You need to wrap the object into a NVP to use it with XML archives. 2.) You can only serialize const objects into a output archive, hence try passing a const pointer to the RemoteMessagingSystem::serialize function

Matthias

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Hi, oh sorry, i was wrong in the last message. Although i changed to pass a const pointer to the serialize function, the errors are still there ... I have put the attribute in NVP wrappers. You can see the header file Mesage.h here http://codepad.org/ktpm8Aab Regards, Binh Matthias Troyer-2 wrote:

On 4 Mar 2010, at 00:54, Binh Luong wrote:

...

Hi,

thank you very much for your answer. I was stuck with this problem for days. I have changed the code so that a const pointer is now passed to the RemoteMessagingSystem::serialize: string RemoteMessagingSystem::serialize (Message* const msg) { ... }

But the problem with deserialize is still there:

...

Here is the code fragement: Message* RemoteMessagingSystem::deserialize (string data) { stringstream archivStream (data, ios_base::binary | ios_base::in); #ifdef REMOTE_XML boost::archive::xml_iarchive inputArchive( archivStream ); #else boost::archive::binary_iarchive inputArchive( archivStream ); #endif

Message* msg = NULL; //line 164 inputArchive >> msg;

return msg; }

Should I also change here Message* to Message* const?

Actually it is something strange because with the old versoin Boost 1.38 there are no compiling errors. Since i compiled and installed the new version 1.42 i got those errors. Something should be changed between the 2 versions although i have compared the both source codes but do not find any difference :/

Did you try putting it into an NVP wrapper? AFAIK XML archives only serialize NVPs

Matthias

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Hi, sorry that i forgot the code. Here you are http://codepad.org/TbPq2PWb Regards, Binh Matthias Troyer-2 wrote:

On 4 Mar 2010, at 12:40, Binh Luong wrote:

...

Hi,

oh sorry, i was wrong in the last message. Although i changed to pass a const pointer to the serialize function, the errors are still there ... I have put the attribute in NVP wrappers.

You can see the header file Mesage.h here http://codepad.org/ktpm8Aab

Regards, Binh

Can you post the actual code you try to compile? the code you posted did not contain any NVP wrapper around the pointer

Matthias

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Hi, many thanks for your help. After using the nvp-wrapper for msg it works! May be in the new version of boost we do not have to use the nvp-wrapper only for the attributes of a class but also for the class itself (because there are actually no problems with boost 1.38). Once again thank you very much :) Regards, Binh Matthias Troyer-2 wrote:

Look at this line of code:

...

outputArchive & msg;

Can you try making a NVP from msg? and similarly for seserializing?

Matthias

On 4 Mar 2010, at 18:01, Binh Luong wrote:

...

Hi,

sorry that i forgot the code. Here you are http://codepad.org/TbPq2PWb

Regards, Binh

Matthias Troyer-2 wrote:

...

On 4 Mar 2010, at 12:40, Binh Luong wrote:

...

Hi,

oh sorry, i was wrong in the last message. Although i changed to pass a const pointer to the serialize function, the errors are still there ... I have put the attribute in NVP wrappers.

You can see the header file Mesage.h here http://codepad.org/ktpm8Aab

Regards, Binh

Can you post the actual code you try to compile? the code you posted did not contain any NVP wrapper around the pointer

Matthias

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_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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