text: #include <internal/values/config_null.hpp>
  #include <boost/blank.hpp>
  
  using namespace std;
  
  namespace hocon {
  
      config_null::config_null(shared_origin origin) :
              config_value(move(origin)) { }
  
      config_value::type config_null::value_type() const {
          return config_value::type::CONFIG_NULL;
      }
  
      string config_null::transform_to_string() const {
          return "null";
      }
  
      shared_value config_null::new_copy(shared_origin origin) const {
          return make_shared<config_null>(move(origin));
      }
  
      unwrapped_value config_null::unwrapped() const {
          return boost::blank();
      }
  
      bool config_null::operator==(config_value const& other) const {
          return dynamic_cast<config_null const*>(&other);
      }
  
      void config_null::render(string& result, int /*indent*/, bool /*at_root*/, config_render_options /*options*/) const {
          result += "null";
      }
  
  }  // namespace hocon
  