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

Subject: Re: [Boost-users] [serialization] Export macro doesnt work
From: Jari (jaristr_at_[hidden])
Date: 2011-08-29 06:22:09

I also noticed that upon program exit
basic_serializer_map::erase(const basic_serializer * bs)   is being
callled
at line
75

And it contains all the registered classes.

But when serialization call is made before this, in basic_serializer_map::find
at line
95

the m_map contains only few entries.

Why?

the entries seem to be missing from m_map during program execution and
only appear there at begin and end...

On Mon, Aug 29, 2011 at 1:13 PM, Jari <jaristr_at_[hidden]> wrote:
> 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<map_type::iterator, bool> result =
>        m_map.insert(bs);
>
>
> But still get the unexported class error.
>
>
>
> 2011/8/13 Júlio Hoffimann <julio.hoffimann_at_[hidden]>:
>> 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 <jaristr_at_[hidden]>
>>>
>>> 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 <ramey_at_[hidden]> 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
>>> >
>>> >
>>> >
>>> > _______________________________________________
>>> > Boost-users mailing list
>>> > Boost-users_at_[hidden]
>>> > http://lists.boost.org/mailman/listinfo.cgi/boost-users
>>> >
>>> _______________________________________________
>>> Boost-users mailing list
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>>
>>
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>