if (attr_.full_type() == "string") {
    return {AttrNameString(), VariableName(), VariableStrLen()};
  } else if (attr_.full_type() == "list(string)") {
    return {AttrNameString(), VariableName()};  // accepts span directly
  } else if (attr_.is_list()) {
    return {AttrNameString(), VariableSpanData(), VariableSpanLen()};
  } else {
    return {AttrNameString(), VariableName()};
  }
}

}  // namespace cpp