如何将二进制文件反序列化为 object？

Question

I used this method to serialize my object:

void save(Obj& obj) {
    ofstream os("obj.dat", ofstream::binary);
    boost::archive::binary_oarchive ar(os, boost::archive::no_header);
    ar << boost::serialization::make_binary_object(&obj, sizeof(obj));
}

What would be my the code for my Obj load(string fileName) ?

Answer 1

It's basically the same as what you had:

Obj load(std::string const& filename) {
    std::ifstream is(filename, std::ios::binary);
    boost::archive::binary_iarchive ar(is, boost::archive::no_header);
    Obj obj;
    ar >> boost::serialization::make_binary_object(&obj, sizeof(obj));
    return obj;
}

Of course, this is assuming that your type is valid for use with make_binary_object : make sure that Obj is bitwise serializable (POD):

    static_assert(std::is_pod<Obj>::value, "Obj is not POD");

Also, reconsider using namespace : Why is "using namespace std;" considered bad practice?