210             self.last.take().map(|t| Pair::End(*t))  in pop()
510             Pair::End(a) => {  in do_extend()
574             .or_else(|| self.last.next().map(Pair::End))  in next()
586             .map(Pair::End)  in next_back()
624             .or_else(|| self.last.next().map(Pair::End))  in next()
636             .map(Pair::End)  in next_back()
664             .or_else(|| self.last.next().map(Pair::End))  in next()
676             .map(Pair::End)  in next_back()
955     End(T),  enumerator
963             Pair::Punctuated(t, _) | Pair::End(t) => t,  in into_value()
970             Pair::Punctuated(t, _) | Pair::End(t) => t,  in value()
977             Pair::Punctuated(t, _) | Pair::End(t) => t,  in value_mut()
986             Pair::End(_) => None,  in punct()
1011             Pair::End(_) => None,  in punct_mut()
1020             None => Pair::End(t),  in new()
1029             Pair::End(t) => (t, None),  in into_tuple()
1044             Pair::End(t) => Pair::End(t.clone()),  in cloned()
1059             Pair::End(t) => Pair::End(t.clone()),  in clone()
1153                 Pair::End(a) => a.to_tokens(tokens),  in to_tokens()