Method set_option

test/test_main.cc:25–28

    }

    void set_option(bufsize&& bufs) {
        std::cout << "bufsize opt" << std::endl;
        bufsiz_ = bufs.siz_;
    }
    void set_option(executable&& exe) {
        std::cout << "exe opt" << std::endl;
        exe_name_ = std::move(exe.exe_);