In libs/serialization/test there is a test_list_ptrs.cpp that shows how to serialize a list with pointers. Then, in libs/example there is a demo_shared_ptr.cpp that shows how to serialize shared_ptrs. Hopefully you can combine those and it should show how to serialize a list of shared_ptrs Hope this helps, -delfin
-----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users- bounces@lists.boost.org] On Behalf Of Jan Eickmann Sent: Tuesday, May 03, 2005 1:44 PM To: boost-users@lists.boost.org Subject: [Boost-users] Re: Serialization, shared_ptr and namespaces
Hello,
sorry to bump this but I still haven't found a solution or any information on how to use shared_ptr together with serialization.
Anybody can shed some light on this?
Thanks a lot,
Jan Eickmann
Jan Eickmann wrote:
Hi,
I'm trying to serialize a list of shared_ptr's to objects.
Here's a summary of the code I have:
namespace MyNamespace {
class B { //implementation plus standard serialization function };
class A { private: list< shared_ptr<B> > myBs; public: template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & BOOST_SERIALIZATION_NVP(myBs); } };
}
If I just try to serialize it, I get an unregistered_class exception. So I think I have to use BOOST_SHARED_POINTER_EXPORT(_GUID) to register the shared_ptr.
When I include this inside the namespace (please note that the error messages are from my real code, so they have slightly other names:
BOOST_SHARED_POINTER_EXPORT(B)
I get this: f:\xenocide\xenocide\src\common\simulation\simulation.h(108) : error C2059: syntax error : 'string' f:\xenocide\xenocide\src\common\simulation\simulation.h(108) : error C2146: syntax error : missing ';' before identifier 'BOOST_CLASS_EXPORT_GUID' f:\xenocide\xenocide\src\common\simulation\simulation.h(108) : error C2059: syntax error : 'string' f:\xenocide\xenocide\src\common\simulation\simulation.h(109) : error C2143: syntax error : missing ';' before '}'
When I put it outside the namespace I have to use a fully qualified name including the namespace for class B, so it becomes
BOOST_SHARED_POINTER_EXPORT(MyNamespace::B)
Then I get (not Xenocide is here what MyNamespace is in my example): f:\xenocide\xenocide\src\common\simulation\simulation.h(115) : error C2653: '__shared_ptr_Xenocide' : is not a class or namespace name f:\xenocide\xenocide\src\common\simulation\simulation.h(115) : error C2653: '__shared_ptr_Xenocide' : is not a class or namespace name
I also tried various combinations with BOOST_SHARED_POINTER_EXPORT_GUID but it didn't help.
Can someone explain to me how I have to declare shared_ptr's in order for them to work with boost::serialization? I was unable to find some more indepth documentation.
Thanks,
Jan Eickmann
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