module JSON::TruffleRuby::Generator::GeneratorMethods::Object

def to_json(state = nil, *)

special method #to_json was defined for some object.
it to a JSON string, and returns the result. This is a fallback, if no
Converts this object to a string (calling #to_s), converts 
def to_json(state = nil, *)
  state = State.from_state(state) if state
  if state&.strict?
    value = self
    if state.strict? && !(false == value || true == value || nil == value || String === value || Array === value || Hash === value || Integer === value || Float === value || Fragment === value)
      if state.as_json
        value = state.as_json.call(value)
        unless false == value || true == value || nil == value || String === value || Array === value || Hash === value || Integer === value || Float === value || Fragment === value
          raise GeneratorError.new("#{value.class} returned by #{state.as_json} not allowed in JSON", value)
        end
        value.to_json(state)
      else
        raise GeneratorError.new("#{value.class} not allowed in JSON", value)
      end
    end
  else
    to_s.to_json
  end
end