[Boost-users] serialization/fusion: non intrusive serialize() function templated on type being serialized

Subject: [Boost-users] serialization/fusion: non intrusive serialize() function templated on type being serialized
From: Hicham Mouline (hicham_at_[hidden])
Date: 2010-12-17 06:26:49

Hello,
 
I have a base class and a large number of derived classes that are all adapted as fusion sequences.
The intention is to serialize through the base pointer.
 struct Base; struct D_1 : public Base;struct D_2 : public Base;... 
All the D_i are adapted as fusion sequences. Besides, there is an mpl vector of all the D_i called DVECTOR.
 
In a normal setting, I would have written this:
 
 template <typename Archive>void serialize(Archive& ar, Base& b, unsigned int ){  ar & b.member1;}
 

 template <typename Archive>void serialize(Archive& ar, D1& d, unsigned int ){  ar & boost::serialization::base_object<Base>(d);  ar & d.memberd1;}BOOST_CLASS_EXPORT_KEY(D1)
 
and the same for all D_i. Then I would need BOOST_CLASS_EXPORT_IMPLEMENT for all the D_i as well in the relevant translation units.
 
The base_object part of serialize() is the same for all D_i
The D_i specific part of serialize(), I have the ability to generate with fusion meta functions.
 
This leads to a template function with 2 template arguments:
 
template <typename Archive, template Derived>void serialize(Archive& ar, Derived& d, unsigned int ){  ar & boost::serialization::base_object<Base>(d);  // fusion code to work on the Derived fusion sequence to generate a  " ar & ... " line for each member of Derived} 
Robert, My question is about the BOOST_CLASS_EXPORT_KEY() and BOOST_CLASS_EXPORT_IMPLEMENT() macros.
Am I able to generate all of them from DVECTOR?
 
regards,