void intersect (basic_charset &rhs_, basic_charset &overlap_) { _token.intersect (rhs_._token, overlap_._token); if (!overlap_._token.empty ()) { typename index_set::const_iterator iter_ = _index_set.begin (); typename index_set::const_iterator end_ = _index_set.end (); for (; iter_ != end_; ++iter_) { overlap_._index_set.insert (*iter_); } iter_ = rhs_._index_set.begin (); end_ = rhs_._index_set.end (); for (; iter_ != end_; ++iter_) { overlap_._index_set.insert (*iter_); } if (_token.empty ()) { _index_set.clear (); } if (rhs_._token.empty ()) { rhs_._index_set.clear (); } } }
void intersect (basic_charset &rhs_, basic_charset &overlap_) { _token.intersect (rhs_._token, overlap_._token); if (!overlap_._token.empty ()) { std::merge (_index_set.begin (), _index_set.end (), rhs_._index_set.begin (), rhs_._index_set.end (), std::inserter (overlap_._index_set, overlap_._index_set.end ())); if (_token.empty ()) { _index_set.clear (); } if (rhs_._token.empty ()) { rhs_._index_set.clear (); } } }
bool empty () const { return _token.empty () && _index_set.empty (); }