Re: [Boost-users] Problems using boost serializingandcustomconstructors

Subject: Re: [Boost-users] Problems using boost serializingandcustomconstructors
From: Frank Birbacher (bloodymir.crap_at_[hidden])
Date: 2012-03-13 14:43:28

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Hi!

Am 13.03.12 20:39, schrieb Robert Ramey:
> I posted a example - did this not work?

It worked for me using Boost 1.47. The code below can output or input
serialization data. It links to Boost.Serialization of course. I
tested it by running it twice and piping the output of the first into
the input of the second instance:

$dist/test 1 | dist/test 2
1

Frank

///// Main.cpp:
#include <vector>

struct A {
    std::vector<unsigned> data;
};

struct B {
    const std::vector<unsigned> * data_ptr;
};

struct C {
    A a;
    std::vector<B> elements;
};

template<class Archive>
void serialize(Archive &ar, A & a, const unsigned int version){
    ar & a.data;
}
template<class Archive>
void serialize(Archive &ar, B & b, const unsigned int version){
    ar & b.data_ptr;
}
template<class Archive>
void serialize(Archive &ar, C & c, const unsigned int version){
    ar & c.a;
    ar & c.elements;
}

struct Sample {
        Sample();
        C const& getC() { return c; }
        C c;
} sample;

Sample::Sample()
{
        c.a.data.push_back(5);
        const B b = { &c.a.data };
        c.elements.resize(2, b);
}

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

void output()
{
        boost::archive::text_oarchive ar(std::cout);
        ar << sample.c;
}

void input()
{
        boost::archive::text_iarchive ar(std::cin);
        ar >> sample.c;
        std::cout << (!sample.c.elements.empty() && &sample.c.a.data ==
sample.c.elements.front().data_ptr)
                << std::endl;
}

int main(int argc, char *argv[])
{
        if(argc < 2) {
                std::cerr << "no argument\n";
                return -3;
        }
        switch (boost::lexical_cast<unsigned>(argv[1])) {
                case 1:
                        output();
                        break;
                case 2:
                        input();
                        break;
                default:
                        std::clog << "give option 1 or 2\n";
                        return -2;
        }
}
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