inline void LinkReferences::visit(Reference &ope) {
  // Check if the reference is a macro parameter
  auto found_param = false;
  for (size_t i = 0; i < params_.size(); i++) {
    const auto &param = params_[i];
    if (param == ope.name_) {
      ope.iarg_ = i;
      found_param = true;
      break;
    }
  }

  // Check if the reference is a definition rule
  if (!found_param && grammar_.count(ope.name_)) {
    auto &rule = grammar_.at(ope.name_);
    ope.rule_ = &rule;
  }

  for (auto arg : ope.args_) {
    arg->accept(*this);
  }
}
Unknown