Trait grabbag::iter::fold::FoldrIterator

pub trait FoldrIterator<E>: DoubleEndedIterator + Iterator<Item=E> + Sized {
    fn foldr<F: FnMut(E, E) -> E>(self, f: F) -> Option<E> { ... }
}

( ..., a_n-2, a_n-1, a_n, ), ⊗ → ... ⊗ (a_n-2 ⊗ (a_n-1 ⊗ (a_n)))

Provided Methods

fn foldr<F: FnMut(E, E) -> E>(self, f: F) -> Option<E>

Folds the elements of the iterator together, from right to left, using f.

Returns None if the iterator is empty.

Implementors