Compilation error with boost serialization - c++

Question

I created a small sample for testing the boost serialization library, but I have a compilation problem.
First of all, here's the code:
#include <iostream>
#include <fstream>
#include <iomanip>
#include <boost/filesystem/operations.hpp>
#include <boost/serialization/nvp.hpp>
#include <boost/filesystem/fstream.hpp>
#include <boost/archive/xml_iarchive.hpp>
#include <boost/archive/xml_oarchive.hpp>
#include <boost/archive/binary_oarchive.hpp>
#include <boost/archive/binary_iarchive.hpp>
#include <boost/serialization/utility.hpp>
#include <boost/serialization/list.hpp>
#include <boost/serialization/version.hpp>
std::vector<uint8_t> buf;
class MyClass
{
public:
MyClass(){};
virtual ~MyClass(){};
int assetStatus;
friend class boost::serialization::access;
template<typename Archive> void serialize(
Archive & ar,
const unsigned int version)
{
ar & BOOST_SERIALIZATION_NVP(assetStatus);
}
std::string ToString()
{
std::string toret;
toret += " assetStatus: " + assetStatus;
return toret;
}
};
int main()
{
MyClass a, b;
a.assetStatus = 10;
std::cout << a.ToString();
boost::archive::xml_oarchive ooxml(std::ofstream(dbPath));
ooxml << BOOST_SERIALIZATION_NVP(a); // error here
MyClass d;
boost::archive::xml_iarchive iixml(std::ifstream(dbPath));
iixml >> BOOST_SERIALIZATION_NVP(d); // error here
std::cout << d.ToString();
}
I get a compilation error at the lines:
ooxml << BOOST_SERIALIZATION_NVP(a);
and
iixml >> BOOST_SERIALIZATION_NVP(d);
The error is:
no match for operator>> in 'iixml >> boost::serialization::make_nvp(const char*, T&) [with T=MyClass(((MyClass&)(&d)))]'
Do you have any idea regarding the meaning of this?

Answer 1

It looks like dbPath is not defined. Additionally, the declaration of ooxml/iixml appears incorrect.
Try modifying your code to do the following:
...
const char * dbPath = "file.xml"
std::ofstream ofs(dbPath);
boost::archive::xml_oarchive ooxml(ofs);
ooxml << BOOST_SERIALIZATION_NVP(a);
std::ifstream ifs(dbPath);
boost::archive::xml_iarchive iixml(ofs);
iixml >> BOOST_SERIALIZATION_NVP(d);

Answer 2

I think NVP (name value pair) is not supported for reading (i.e. with iixml), either use & (instead of >>) or iixml >> d;