Method count

ext/include/tsl/array-hash/array_set.h:308–310

   */
#ifdef TSL_AH_HAS_STRING_VIEW
  size_type count(const std::basic_string_view<CharT>& key) const {
    return m_ht.count(key.data(), key.size());
  }
#else
  size_type count(const CharT* key) const {
    return m_ht.count(key, std::char_traits<CharT>::length(key));