19 type ResultOrEmpty = result::Result<Option<Patch>, Error>;  typedef
268     fn c(&mut self, expr: &Hir) -> ResultOrEmpty {  in c()
392     fn c_empty(&mut self) -> ResultOrEmpty {  in c_empty()
405     fn c_capture(&mut self, first_slot: usize, expr: &Hir) -> ResultOrEmpty {  in c_capture()
440     fn c_char(&mut self, c: char) -> ResultOrEmpty {  in c_char()
457     fn c_class(&mut self, ranges: &[hir::ClassUnicodeRange]) -> ResultOrEmpty {  in c_class()
477     fn c_byte(&mut self, b: u8) -> ResultOrEmpty {  in c_byte()
484     ) -> ResultOrEmpty {  in c_class_bytes()
511     fn c_empty_look(&mut self, look: EmptyLook) -> ResultOrEmpty {  in c_empty_look()
540     fn c_alternate(&mut self, exprs: &[Hir]) -> ResultOrEmpty {  in c_alternate()
589     fn c_repeat(&mut self, rep: &hir::Repetition) -> ResultOrEmpty {  in c_repeat()
611     ) -> ResultOrEmpty {  in c_repeat_zero_or_one()
631     ) -> ResultOrEmpty {  in c_repeat_zero_or_more()
652     ) -> ResultOrEmpty {  in c_repeat_one_or_more()
673     ) -> ResultOrEmpty {  in c_repeat_range_min_or_more()
695     ) -> ResultOrEmpty {  in c_repeat_range()
829     fn pop_split_hole(&mut self) -> ResultOrEmpty {  in pop_split_hole()