Re: [Boost-users] [boost::serialization] Serializing Dynamically Loaded Libraries - "Unregistered Void Cast"

From: Sergey Skorniakov (s.skorniakov_at_[hidden])
Date: 2007-09-05 05:01:09

I think this is because one half of code that registers classes relationship resides in derived.so and the other part resides in main. The first part is the 
BOOST_CLASS_EXPORT_GUID(derived,"derived") - it instantiates pointer_oserializer and pointer_iserializer for known archives and derived (and, in turn, 

extended_type_info for derived), the second pairt is in derived serialize function - "ar & boost::serialization::base_object<base>(*this);" - it instantiated in main and calls void_cast_register internally. Try to move BOOST_CLASS_EXPORT_GUID(derived,"derived") into derived.hpp - I guess that it will force instantiation of pointer_oserializer/pointer_iserializer in main.

I had similar problem with MSVC.

Sorry for my poor English


"Jeshua Bratman" <bratman_at_[hidden]> wrote in message news:12487645.post_at_talk.nabble.com...
> 
> 
> John Pye-4 wrote:
>> 
>> Hi Jeshua,
>> 
>> Vaguely related comment on your problem. I was also recently seeing this
>> "unregistered void cast" runtime error. As far as I could tell it was a
>> problem relating to my ordering and placement of "#include
>> <boost/archive/text_oarchive.hpp> (or ditto iarchive), and "#include
>> <boost/serialization/export.hpp> as well as calls to BOOST_CLASS_EXPORT.
>> 
>> It was nothing to do with my use of void_cast_register, which in fact I
>> don't use anywhere in any of my code.
>> 
>> So FWIW I think that this error message is not particularly helpful or
>> well-worded.
>> 
>> Cheers
>> JP
>> 
> JP,
> 
> Thanks for the comment.
> 
> This issue was mentioned to me in my previous message I sent out. I believe
> I have the includes ordered correctly. What Robert said was that I need to
> include the archives before the export header file. Here's the order in
> which I include the serialization headers:
> 
> #include <boost/archive/text_oarchive.hpp>
> #include <boost/archive/text_iarchive.hpp>
> #include <boost/serialization/serialization.hpp>
> #include <boost/serialization/base_object.hpp>
> #include <boost/serialization/export.hpp>
> 
> Here is my code just to make things easier. There should be 5 files:
> Makefile
> main.cpp
> base.hpp
> derived.hpp
> derived.cpp
> 
> http://www.nabble.com/file/p12487645/serialization_dynamic_test.tar.gz

> serialization_dynamic_test.tar.gz 
> 
> Thanks,
> Jeshua Bratman
> -- 
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