Re: [Boost-users] [serialization] Export macro doesnt work

Thx I tried this but it didnt fix the problem.. I traced in basic_serializer_map.cpp and noticed that all the classes are being inserted to m_map , some even multiple times and also lot of null pointers. in Line 46: const std::pair result = m_map.insert(bs); But still get the unexported class error. 2011/8/13 Júlio Hoffimann :

Hi Jari, I had the same frustration with Boost.Serialization these days, i know exactly what you're thinking: wtf?! This should be easy! Let me tell you what solved the problem in my case... Suppose you have a derived class D implemented as usual (D.hpp / D.cpp). You need to use the two macros mentioned at the end of the files *outside* any namespace. For instance:

//////////////////////////////D.hpp namespace N { class D : public B { // something }; } // namespace N

BOOST_CLASS_EXPORT_KEY( N::D )

//////////////////////////////D.cpp #include D.hpp

namespace N { // D implementation } // namespace N

BOOST_CLASS_EXPORT_IMPLEMENT( N::D )

You also need to include the boost::archives you're using in D.hpp, since this is the obscure way Boost.Serialization instantiates code for your class. Regards, Júlio.

2011/8/12 Jari

...

I'm using  1.46.1.

So I must use  EXPORT_KEY and EXPORT_IMPL ?

On Fri, Aug 12, 2011 at 7:33 AM, Robert Ramey wrote:

...

Jari wrote:

...

Ok I tried one test code and it worked, but when I moved the all the classes in header file and but the export macro in cpp file it fails with "derived class not registered or exported".

Then I moved the export macros to main.cpp right before main() and before the saving/loading calls, and that did the trick.

So it seems export's need to be in same CPP file where the loading/saving starts? Or is it in same cpp where the function is?

Im using visual studio 10 express

The question of export being in the *.ccp and/or in the header was a confusion which has only been resolved in recent versions of the library.  Now there is EXPORT_KEY and EXPORT_IMPL... Which resolves the ocnfusion. I don't know which version of boost you're using so I don't know if this addresses your issue or not.

Robert Ramey

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