Method Lookup

cpp/src/arrow/util/hashing.h:259–263

  // Return a (Entry*, found) pair.
  template <typename CmpFunc>
  std::pair<Entry*, bool> Lookup(hash_t h, CmpFunc&& cmp_func) {
    auto p = Lookup<DoCompare, CmpFunc>(h, entries_, capacity_mask_,
                                        std::forward<CmpFunc>(cmp_func));
    return {&entries_[p.first], p.second};
  }

  template <typename CmpFunc>
  std::pair<const Entry*, bool> Lookup(hash_t h, CmpFunc&& cmp_func) const {