From: Jan Eickmann (je_at_[hidden])
Date: 2005-05-03 15:43:57
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