183     states: RefCell<Vec<CState>>,
210 enum CState {  enum
328                 CState::Empty { next } => {  in finish()
334                 CState::Range { ref range } => {  in finish()
339                 CState::Sparse { ref mut ranges } => {  in finish()
350                 CState::Union { ref mut alternates } => {  in finish()
358                 CState::UnionReverse { ref mut alternates } => {  in finish()
367                 CState::Match => {  in finish()
379             while let CState::Empty { next } = bstates[empty_next] {  in finish()
787             CState::Empty { ref mut next } => {  in patch()
790             CState::Range { ref mut range } => {  in patch()
793             CState::Sparse { .. } => {  in patch()
796             CState::Union { ref mut alternates } => {  in patch()
799             CState::UnionReverse { ref mut alternates } => {  in patch()
802             CState::Match => {}  in patch()
808         self.states.borrow_mut().push(CState::Empty { next: 0 });  in add_empty()
815         let state = CState::Range { range: trans };  in add_range()
823             let state = CState::Range { range: ranges[0] };  in add_sparse()
828         let state = CState::Sparse { ranges };  in add_sparse()
835         let state = CState::Union { alternates: vec![] };  in add_union()
842         let state = CState::UnionReverse { alternates: vec![] };  in add_reverse_union()
849         self.states.borrow_mut().push(CState::Match);  in add_match()