pub trait DoubleEndedFallibleIterator: FallibleIterator {
// Required method
fn next_back(&mut self) -> Result<Option<Self::Item>, Self::Error>;
// Provided methods
fn rfold<B, F>(self, init: B, f: F) -> Result<B, Self::Error>
where Self: Sized,
F: FnMut(B, Self::Item) -> Result<B, Self::Error> { ... }
fn try_rfold<B, E, F>(&mut self, init: B, f: F) -> Result<B, E>
where Self: Sized,
E: From<Self::Error>,
F: FnMut(B, Self::Item) -> Result<B, E> { ... }
}
Expand description
A fallible iterator able to yield elements from both ends.
Required Methods§
Provided Methods§
sourcefn rfold<B, F>(self, init: B, f: F) -> Result<B, Self::Error>
fn rfold<B, F>(self, init: B, f: F) -> Result<B, Self::Error>
Applies a function over the elements of the iterator in reverse order, producing a single final value.