simone pilozzi a écrit :

Hi All,

I am working with the serialization library and I made an example class like this.

class

Contact{

public:

Contact(){}

Contact(string& name, int phonenumber,long contactdate):name_(name),

pnumber_(phonenumber),contactdate_(contactdate){}

const string getName() const{return name_;}

const long getPhone() const{return pnumber_;}

const long getDate() const{return contactdate_;}

private

:

string name_;

long pnumber_,contactdate_; friend class boost::serialization::access; template<typename Archive> void serialize(Archive& ar, const unsigned int version){

ar & boost::serialization::make_nvp(

"name", name_);

ar & boost::serialization::make_nvp(

"phone", pnumber_);

ar & boost::serialization::make_nvp(

"contactdate", contactdate_);

}

};

Now I would like to allocate the xml file created with the use of this class in a vector, and this is the function:

void

getFromFile(std::vector<Contact>& contacts,const char* file){

std::ifstream ifile(file);

boost::archive::xml_iarchive ia(ifile);

ia >> contacts;

ifile.close();

}

The compiler complains because it misses a NVP wrapper for the class. I could not find an example for that in boost.

Could you help me ?

Thanks in advance

Simone

Hi simone I guess you should use : ia >> boost::serialization::make_nvp("contacts", contacts); in place of what you propose (which is correct for text_archive by the way). AFAIU, the NVP wrapper is needed at all levels of your (de)serialization code, not only within the 'serialize' methods for class attributes. have a look on the XML archives you can generate with such method (using some basic text editor), you will understand how Boost/serialization XML archives system generates XML tags and why NVP wrappers are mandatory here. regards frc -- François Mauger Groupe "Interactions Fondamentales et Nature du Neutrino" NEMO-3/SuperNEMO Collaboration LPC Caen-CNRS/IN2P3-UCBN-ENSICAEN Département de Physique -- Université de Caen Basse-Normandie Adresse/address: Laboratoire de Physique Corpusculaire de Caen (UMR 6534) ENSICAEN 6, Boulevard du Marechal Juin 14050 CAEN Cedex FRANCE Courriel/e-mail: mauger@lpccaen.in2p3.fr Tél./phone: 02 31 45 25 12 / (+33) 2 31 45 25 12 Fax: 02 31 45 25 49 / (+33) 2 31 45 25 49