pub fn fold_tail_option<F, T, T2>(
folder: &mut F,
node: TailOption<T>
) -> TailOption<T2>where
T: AstInfo,
T2: AstInfo,
F: Fold<T, T2> + ?Sized,
pub fn fold_tail_option<F, T, T2>(
folder: &mut F,
node: TailOption<T>
) -> TailOption<T2>where
T: AstInfo,
T2: AstInfo,
F: Fold<T, T2> + ?Sized,