Method insert

include/tsl/ordered_set.h:215–217

  void clear() noexcept { m_ht.clear(); }

  std::pair<iterator, bool> insert(const value_type& value) {
    return m_ht.insert(value);
  }
  std::pair<iterator, bool> insert(value_type&& value) {
    return m_ht.insert(std::move(value));
  }