833 pub struct ClassUnicode {  struct
834     set: IntervalSet<ClassUnicodeRange>,  argument
837 impl ClassUnicode {  implementation
915     pub fn union(&mut self, other: &ClassUnicode) {  in union()
921     pub fn intersect(&mut self, other: &ClassUnicode) {  in intersect()
926     pub fn difference(&mut self, other: &ClassUnicode) {  in difference()
938     pub fn symmetric_difference(&mut self, other: &ClassUnicode) {  in symmetric_difference()
1524     fn uclass(ranges: &[(char, char)]) -> ClassUnicode {  in uclass()  argument
1543     fn ucasefold(cls: &ClassUnicode) -> ClassUnicode {  in ucasefold()
1549     fn uunion(cls1: &ClassUnicode, cls2: &ClassUnicode) -> ClassUnicode {  in uunion()
1555     fn uintersect(cls1: &ClassUnicode, cls2: &ClassUnicode) -> ClassUnicode {  in uintersect()
1561     fn udifference(cls1: &ClassUnicode, cls2: &ClassUnicode) -> ClassUnicode {  in udifference()
1568         cls1: &ClassUnicode,  in usymdifference()
1569         cls2: &ClassUnicode,  in usymdifference()
1570     ) -> ClassUnicode {  in usymdifference()
1576     fn unegate(cls: &ClassUnicode) -> ClassUnicode {  in unegate()