Function AllNulls

cpp/src/arrow/util/trie_test.cc:102–105

}

static std::vector<std::string> AllNulls() {
  return {"#N/A",    "#N/A N/A", "#NA", "-1.#IND", "-1.#QNAN", "-NaN", "-nan", "1.#IND",
          "1.#QNAN", "N/A",      "NA",  "NULL",    "NaN",      "n/a",  "nan",  "null"};
}

static void TestTrieContents(const Trie& trie, const std::vector<std::string>& entries) {
  std::unordered_map<std::string, int32_t> control;