39     first: *mut ListLinksFields,  field
238             first: ptr::null_mut(),  in new()
245         self.first.is_null()  in is_empty()
262         if self.first.is_null() {  in push_back()
263             self.first = item;  in push_back()
271             let next = self.first;  in push_back()
302         if self.first.is_null() {  in push_front()
310             let next = self.first;  in push_front()
323         self.first = item;  in push_front()
328         if self.first.is_null() {  in pop_back()
333         let last = unsafe { (*self.first).prev };  in pop_back()
340         if self.first.is_null() {  in pop_front()
345         Some(unsafe { self.remove_internal(self.first) })  in pop_front()
443         if self.first == item {  in remove_internal_inner()
447             self.first = unsafe { (*prev).next };  in remove_internal_inner()
467             self.first = other.first;  in push_all_back()
469             let other_first = other.first;  in push_all_back()
472             let self_first = self.first;  in push_all_back()
488         other.first = ptr::null_mut();  in push_all_back()
495         if self.first.is_null() {  in cursor_front()
499                 current: self.first,  in cursor_front()
510             current: self.first,  in iter()
511             stop: self.first,  in iter()
611         if next == self.list.first {  in next()
628         if self.current == self.list.first {  in prev()