Hi,
I’ve just installed Boost 1.58 and ran into the following problem: I have a class with a std::vector >, that is supposed to always have at least one entry, but may have more. Hence, in the default constructor, I initialize the std::vector with one entry. The class is also serializable. Up until Boost 1.57, a de-serialized object always had the correct number of entries in the vector. As of 1.58, I am getting one entry too much, which probably means that Boost.Serialization simply attaches entries to the vector of a default-constructed class, but doesn’t clear it first. This happens in C++11-Mode, both on Ubuntu 14.10 (gcc 4.9.1) as well as on MacOS X Yosemite . It DOES NOT happen with a std::vector<double> . Below is a full test case that replicates the problem in a simplified environment.
For Boost 1.57 the program returns:
t_vec.size() = 1
t_vec2.size() = 1
For Boost 1.58 the answer is
t_vec.size() = 1
t_vec2.size() = 2
Best Regards,
Beet
/******************************************************/
#include
#include
#include
#include
#include
#include <iostream>
#include <vector>
#include <sstream>
namespace boost {
namespace serialization {
template
void serialize(archive & ar, boost::tuple & tpl, unsigned int) {
using namespace boost;
using boost::serialization::make_nvp;
ar
& make_nvp("tpl_0", boost::get<0>(tpl))
& make_nvp("tpl_1", boost::get<1>(tpl))
& make_nvp("tpl_2", boost::get<2>(tpl));
}
} /* namespace serialization */
} /* namespace boost */
int main() {
std::vector > t_vec, t_vec2(1);
std::ostringstream oss;
t_vec.push_back(boost::tuple(1.,2.,3.));
std::cout << "t_vec.size() = " << t_vec.size() << std::endl;
// save data to archive
{
boost::archive::xml_oarchive oa(oss);
// write class instance to archive
oa & BOOST_SERIALIZATION_NVP(t_vec);
// archive and stream closed when destructors are called
// Data is now in oss
}
// load data from archive
{
std::istringstream iss(oss.str());
boost::archive::xml_iarchive ia(iss);
// read class state from archive
ia & BOOST_SERIALIZATION_NVP(t_vec2);
// archive and stream closed when destructors are called
}
std::cout << "t_vec2.size() = " << t_vec2.size() << std::endl;
}
