Method ToDotPath

cpp/src/arrow/type.cc:2066–2088

}

std::string FieldRef::ToDotPath() const {
  struct Visitor {
    std::string operator()(const FieldPath& path) {
      std::string out;
      for (int i : path.indices()) {
        out += "[" + internal::ToChars(i) + "]";
      }
      return out;
    }

    std::string operator()(const std::string& name) { return "." + name; }

    std::string operator()(const std::vector<FieldRef>& children) {
      std::string out;
      for (const auto& child : children) {
        out += child.ToDotPath();
      }
      return out;
    }
  };

  return std::visit(Visitor{}, impl_);
}

size_t FieldRef::hash() const {
  struct Visitor : std::hash<std::string> {