[Boost-users] boost::serialization - track_never, load and save in cpp file?

Subject: [Boost-users] boost::serialization - track_never, load and save in cpp file?
From: Martin Trappel (0xCDCDCDCD_at_[hidden])
Date: 2009-02-24 04:21:39

Hi.

To support the serialization of a class I don't want to change anything, 
I have added free save and load function. (See the test code below.)
It compiles and appears to work.

I have the following questions:
* Is it OK to put the save & load definitions in a separate 
implementation file?
* Is it OK  to specify track_never in a cpp file? Will this cause 
problems if someone else tries to serialize a map<int, string> ?

thanks!
- Martin

- global_serialization.h -
// ...
class MyComplexClass;
// ...
namespace boost {
namespace serialization {
// Declare save and load for MyComplexClass
template<class Archive>
void save(Archive & ar, const MyComplexClass& t, unsigned int version);
template<class Archive>
void load(Archive & ar, MyComplexClass& t, unsigned int version);
}
}
// Split:
BOOST_SERIALIZATION_SPLIT_FREE(MyComplexClass);

*****

- complex_class_serialization.cpp -
// ...
#include "ComplexClass.h"
// ...
typedef std::map<int, std::string ser_map_t;
BOOST_CLASS_TRACKING(ser_map_t, boost::serialization::track_never);

namespace boost {
namespace serialization {
template<class Archive>
void save(Archive & ar, const MyComplexClass& t, unsigned int version)
{
   // the relevant information to be serialized for
   // instances of MyComplexClass can be represented
   // by a map<int, string>

   ser_map_t m;
   // ... fill m object from t object

   ar << m; // Serialize
}

template<class Archive>
void load(Archive & ar, CBoxHandler & t, unsigned int version)
{
   ser_map_t m;
   ar >> m;

   // ... init t object from m
}

} // namespace serialization
} // namespace boost