Trait fallible_iterator::DoubleEndedFallibleIterator

pub trait DoubleEndedFallibleIterator: FallibleIterator {
    fn next_back(&mut self) -> Result<Option<Self::Item>, Self::Error>;
}

A fallible iterator able to yield elements from both ends.

Required Methods

fn next_back(&mut self) -> Result<Option<Self::Item>, Self::Error>

Advances the end of the iterator, returning the last value.

Implementations on Foreign Types

impl<'a, I: DoubleEndedFallibleIterator + ?Sized> DoubleEndedFallibleIterator for &'a mut I

fn next_back(&mut self) -> Result<Option<I::Item>, I::Error>

impl<I: DoubleEndedFallibleIterator + ?Sized> DoubleEndedFallibleIterator for Box<I>

fn next_back(&mut self) -> Result<Option<I::Item>, I::Error>

Implementors

• impl<T, U> DoubleEndedFallibleIterator for Chain<T, U> where
    T: DoubleEndedFallibleIterator,
    U: DoubleEndedFallibleIterator<Item = T::Item, Error = T::Error>, 
• impl<'a, T, I> DoubleEndedFallibleIterator for Cloned<I> where
    I: DoubleEndedFallibleIterator<Item = &'a T>,
    T: 'a + Clone, 
• impl<T, E, I> DoubleEndedFallibleIterator for Convert<I> where
    I: DoubleEndedIterator<Item = Result<T, E>>, 
• impl<I, F> DoubleEndedFallibleIterator for Filter<I, F> where
    I: DoubleEndedFallibleIterator,
    F: FnMut(&I::Item) -> bool, 
• impl<B, I, F> DoubleEndedFallibleIterator for FilterMap<I, F> where
    I: DoubleEndedFallibleIterator,
    F: FnMut(I::Item) -> Option<B>, 
• impl<B, F, I> DoubleEndedFallibleIterator for Map<I, F> where
    I: DoubleEndedFallibleIterator,
    F: FnMut(I::Item) -> B, 
• impl<B, F, I> DoubleEndedFallibleIterator for MapErr<I, F> where
    I: DoubleEndedFallibleIterator,
    F: FnMut(I::Error) -> B, 
• impl<I> DoubleEndedFallibleIterator for Rev<I> where
    I: DoubleEndedFallibleIterator,