Re: [boost] [Serialization] warnings and maybe a 'bug'

Subject: Re: [boost] [Serialization] warnings and maybe a 'bug'
From: Robert Ramey (ramey_at_[hidden])
Date: 2009-11-09 13:17:47

Christoph Duelli wrote:
> Robert Ramey wrote:
>
>> Christoph Duelli wrote:
>>
>>> I also get lots of
>>> boost::archive::detail::<unnamed>::init_guid<XXXX>::g' defined but
>>> not used where XXXX is some class name of mine
>>
>> Is it possible that the class is marked "EXPORT" when this is not
>> in fact necessary?
> Well, when *is* it necessary?
> The serialization code for classes are usually looks like this:
>
> BOOST_CLASS_EXPORT_GUID(Node, "Node")
>
> void Node::serialize(InArchive & ar, const unsigned int /*
>    file_version */){ ar & BOOST_SERIALIZATION_NVP(m_sFileName)
>       & ... ;
> }
> void Node::serialize(OutArchive & ar, const unsigned int /*
> file_version */ {
>    ar & BOOST_SERIALIZATION_NVP(m_sFileName)
>       & ... ;
> }
>
>
> Maybe I have misunderstood when I need to used
> BOOST_CLASS_EXPORT_GUID; I will read up on that again.
>
>
>>> ii) maybe a 'bug' (code does no longer compile)
>>> Code that used to compile with Boost 1.40 does no longer compile
>>> with the
>>> 1.41 beta:
>>> (I had no time to investigate yet; in case it is obvious for you
>>> once you
>>> see the code I have decided to include this point in this posting):
>>>
>>> boost/archive/shared_ptr_helper.hpp:114: error: cannot convert
>>> 'const boost::serialization::extended_type_info_typeid<MEPfad>' to
>>> 'const boost::serialization::extended_type_info*' in return
>>> (where MEPfad is a class of mine)
>>
>> In this case the code actually looks wrong to me. I'm curious why it
>> never failed any tests.  If you have a small bit of source which
>> traps
>> this problem, I would be curious to see it.
> I have created a stripped down example that exhibits the error.
> (Basic ingredients: shared_ptr, binary_iarchive.)
> See attachment.

The "serialize" function should never be called directly by the app.

I'll look into why this is not trapped.

Robert Ramey