Method PrintToString

depends/protobuf/google/protobuf/text_format.cc:898–908

TextFormat::Printer::~Printer() {}

bool TextFormat::Printer::PrintToString(const Message& message,
                                        string* output) const {
  GOOGLE_DCHECK(output) << "output specified is NULL";

  output->clear();
  io::StringOutputStream output_stream(output);

  bool result = Print(message, &output_stream);

  return result;
}

bool TextFormat::Printer::PrintUnknownFieldsToString(
    const UnknownFieldSet& unknown_fields,