#include <fstream>
#include <string>
#include <sstream>

#include <boost/archive/text_oarchive.hpp>
#include <boost/archive/text_iarchive.hpp>
#include <boost/serialization/vector.hpp>

using namespace std;

template < typename T >
string 
to_string (const T & in)
{
  stringstream oss;
  boost::archive::text_oarchive oc (oss);
  oc << in;
  return oss.str ();
}

template < typename T >
void 
from_string (T & out, const string & str)
{
  stringstream oss(str);
  boost::archive::text_iarchive ia (oss);
  ia >> out;
}

template <typename T >
T 
construct(T, const string & in){
  T var;
  from_string(var, in);
  return var;
}


template < class T > 
void
to_file (const T & in, string filename)
{
  ofstream ofs (filename.c_str ());
  boost::archive::text_oarchive oa (ofs);
  oa << in;
}

template < class T > 
void
from_file (T & out, string filename)
{
  ifstream ifs (filename.c_str (), std::ios::binary);
  boost::archive::text_iarchive ia (ifs);
  ia >> out;
}