Re: [Boost-users] [serialization] deserialized instance empty even though proper serialize methods called [Honeywell Internal]

Subject: Re: [Boost-users] [serialization] deserialized instance empty even though proper serialize methods called [Honeywell Internal]
From: Hickman, Steve (AdvTech) (Steve.Hickman_at_[hidden])
Date: 2014-06-03 06:34:24

Classification: Honeywell Internal
All serialize methods (except the base class serialize method) have as their first three lines code like this (with the appropriate

   BOOST_LOG_TRIVIAL(trace) << CLASS_METHOD << "  called";

   boost::serialization::void_cast_register<derived, base>(

      static_cast<derived *>(nullptr),

      static_cast<base *>(nullptr)

      );

   ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(base);

If that's what you're referring to, it didn't fix the problem
---
Steve H.
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This message classified as Honeywell Internal by Hickman, Steve (AdvTech) on Tuesday, June 03, 2014 at 3:34:21 AM.
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From: Robert Ramey [mailto:robertmacleranramey_at_[hidden]]
Sent: Sunday, June 01, 2014 11:22 AM
To: boostusers_at_[hidden]
Cc: robertmacleranramey_at_[hidden]; boost-users_at_[hidden]; Hickman, Steve (AdvTech)
Subject: Re: [Boost-users] [serialization] deserialized instance empty even though proper serialize methods called
On Saturday, May 31, 2014 2:50:35 PM UTC-7, Robert Ramey wrote:
I woke up in the middle of the night.
The "registration" base/derived pair is a side effect of
class Base {
    virtual~Base();
    template<class Archive);
    void serialize(Archive ar, const unsigned int version);
};
class Derived {
    virtual~Derived();
    template<class Archive);
    void serialize(Archive ar, const unsigned int version);
};
template<class Archive);
void Derived::serialize(Archive ar, const unsigned int version){
   ar & boost::serialization::base_object<Base &>( *this);   // side effect void_cast_register(Base, Derived) which updates the table when DLL is loaded
}
So I'm guessing that you're not calling the base class serialization so the Base/Derived pair isn't being registered.
Solution:
explicitly declare, define and call the Base class serialization even though it is empty.
or
explicitly invoke register void_cast::register base/derived - i forget the exact name.
I'll be surprised if that doesn't solve your problem.
RObert Ramey