Trait core::iter::DoubleEndedIteratorStable

pub trait DoubleEndedIterator: Iterator {
    fn next_back(&mut self) -> Option<Item>;
}

A range iterator able to yield elements from both ends

A DoubleEndedIterator can be thought of as a deque in that next() and next_back() exhaust elements from the same range, and do not work independently of each other.

Required Methods

fn next_back(&mut self) -> Option<Item>

Yield an element from the end of the range, returning None if the range is empty.

Implementors

• impl<Idx: Clone + Step> DoubleEndedIterator for Range<Idx>
• impl<I> DoubleEndedIterator for Rev<I> where I: DoubleEndedIterator
• impl<'a, I> DoubleEndedIterator for ByRef<'a, I> where I: 'a + DoubleEndedIterator
• impl<T, D, I> DoubleEndedIterator for Cloned<I> where T: Clone, D: Deref<Target=T>, I: DoubleEndedIterator<Item=D>
• impl<T, A, B> DoubleEndedIterator for Chain<A, B> where A: DoubleEndedIterator<Item=T>, B: DoubleEndedIterator<Item=T>
• impl<T, U, A, B> DoubleEndedIterator for Zip<A, B> where A: DoubleEndedIterator + ExactSizeIterator<Item=T>, B: DoubleEndedIterator + ExactSizeIterator<Item=U>
• impl<A, B, I, F> DoubleEndedIterator for Map<A, B, I, F> where I: DoubleEndedIterator<Item=A>, F: FnMut(A) -> B
• impl<A, I, P> DoubleEndedIterator for Filter<A, I, P> where I: DoubleEndedIterator<Item=A>, P: FnMut(&A) -> bool
• impl<A, B, I, F> DoubleEndedIterator for FilterMap<A, B, I, F> where I: DoubleEndedIterator<Item=A>, F: FnMut(A) -> Option<B>
• impl<I> DoubleEndedIterator for Enumerate<I> where I: ExactSizeIterator + DoubleEndedIterator
• impl<A, B, I, U, F> DoubleEndedIterator for FlatMap<A, B, I, U, F> where I: DoubleEndedIterator<Item=A>, U: DoubleEndedIterator<Item=B>, F: FnMut(A) -> U
• impl<I> DoubleEndedIterator for Fuse<I> where I: DoubleEndedIterator
• impl<A, I, F> DoubleEndedIterator for Inspect<A, I, F> where I: DoubleEndedIterator<Item=A>, F: FnMut(&A)
• impl<A: Int + ToPrimitive> DoubleEndedIterator for Range<A>
• impl<A: Int + ToPrimitive> DoubleEndedIterator for RangeInclusive<A>
• impl<A: Clone> DoubleEndedIterator for Repeat<A>
• impl<'a, A> DoubleEndedIterator for Iter<'a, A>
• impl<'a, A> DoubleEndedIterator for IterMut<'a, A>
• impl<A> DoubleEndedIterator for IntoIter<A>
• impl<'a, T> DoubleEndedIterator for Iter<'a, T>
• impl<'a, T> DoubleEndedIterator for IterMut<'a, T>
• impl<T> DoubleEndedIterator for IntoIter<T>
• impl<'a, T> DoubleEndedIterator for Iter<'a, T>
• impl<'a, T> DoubleEndedIterator for IterMut<'a, T>
• impl<'a, T, P> DoubleEndedIterator for Split<'a, T, P> where P: FnMut(&T) -> bool
• impl<'a, T, P> DoubleEndedIterator for SplitMut<'a, T, P> where P: FnMut(&T) -> bool
• impl<'a, T> DoubleEndedIterator for Chunks<'a, T>
• impl<'a, T> DoubleEndedIterator for ChunksMut<'a, T>
• impl<'a> DoubleEndedIterator for Chars<'a>
• impl<'a> DoubleEndedIterator for CharIndices<'a>
• impl<'a> DoubleEndedIterator for Bytes<'a>
• impl<'a, P: CharEq> DoubleEndedIterator for Split<'a, P>
• impl<'a, P: CharEq> DoubleEndedIterator for SplitTerminator<'a, P>
• impl<'a> DoubleEndedIterator for Lines<'a>
• impl<'a> DoubleEndedIterator for LinesAny<'a>