Re: [Boost-users] Serialization of derived classes with boost 1.34.1

From: Tim St. Clair (timothysc_at_[hidden])
Date: 2008-08-21 10:32:12

It may help is you give some sample code.  Presently there are too many
unknown(s) to give an accurate answer.  I have some speculations;

    1.) You may want to take a look at the test_no_rtti.cpp example for more
details.  $BOOST_ROOT/libs/serialization/test
    2.) You could check the docs on EXPORT && TYPE_INFO as well.

Cheers,
Tim

On Thu, Aug 21, 2008 at 5:01 AM, Hansi <hansipet_at_[hidden]> wrote:

> Hello,
>
> I have a problem to serialize a derived class.
> In some classes I use a shared_ptr<A> which acts as a interface for some
> other classes.
>
> Til now I had the implementation in the header and it worked fine with the
> BOOST_CLASS_EXPORT(B)
> declaration after at the end of the header file where B was defined.
>
> For performance reason (compile time) I have moved the serialization code
> from the header file (there is only the declaration) to the .cpp file (now I
> use also only the polymorphic_binary_archive). There I have also the
> declaration for the polymorphic_binary_archive
>
> template void B::serialize(boost::archive::polymorphic_iarchive& ar, const
>  unsigned int file_version);
> template void B::serialize(boost::archive::polymorphic_oarchive& ar, const
> unsigned int file_version);
>
> After linking I have now some linker errors. First for the class B which is
> derived from A and for the class A. All linker errors use the
> binary_archive.
>
> If I declare the "BOOST_CLASS_EXPORT(B)" at the end in the .cpp file I get
> only an linker error for class A.
> How I can solve this?
>
> Best regards
> Hansjörg
>
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-- 
Regards,
Timothy St. Clair
[timothysc_at_[hidden]]