Function test_serialization

dlib/test/dnn.cpp:4742–4759

    void test_serialization()
    {
        print_spinner();

        using net_type = loss_mean_squared<fc<1, input<matrix<double>>>>;
        net_type net, net2;

        std::ostringstream out;
        serialize(net, out);
        const std::string serialized = out.str();
        std::istringstream in(serialized);
        dlib::deserialize(net2, in);
        
        std::vector<char> buf1;
        dlib::serialize(buf1) << net;
        std::vector<uint8_t> buf2(buf1.begin(), buf1.end());
        dlib::deserialize(buf2) >> net2;
    }

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