Trait std::iter::ExactSizeIteratorStable

pub trait ExactSizeIterator: Iterator where Self: Iterator {
    fn len(&self) -> usize { ... }
}

An iterator that knows its exact length

This trait is a helper for iterators like the vector iterator, so that it can support double-ended enumeration.

Iterator::size_hint must return the exact size of the iterator. Note that the size must fit in usize.

Provided Methods

fn len(&self) -> usize

Return the exact length of the iterator.

Implementors

• impl<'a, I> ExactSizeIterator for &'a mut I where I: ExactSizeIterator, I: ?Sized
• impl<I> ExactSizeIterator for Enumerate<I> where I: ExactSizeIterator
• impl<I, F> ExactSizeIterator for Inspect<I, F> where I: ExactSizeIterator, F: FnMut(&<I as Iterator>::Item), <F as FnMut(&<I as Iterator>::Item)>::Output == ()
• impl<I> ExactSizeIterator for Rev<I> where I: ExactSizeIterator, I: DoubleEndedIterator
• impl<B, I, F> ExactSizeIterator for Map<I, F> where I: ExactSizeIterator, F: FnMut(<I as Iterator>::Item), <F as FnMut(<I as Iterator>::Item)>::Output == B
• impl<A, B> ExactSizeIterator for Zip<A, B> where A: ExactSizeIterator, B: ExactSizeIterator
• impl<T, D, I> ExactSizeIterator for Cloned<I> where T: Clone, D: Deref, <D as Deref>::Target == T, I: ExactSizeIterator, <I as Iterator>::Item == D
• impl<I> ExactSizeIterator for Peekable<I> where I: ExactSizeIterator
• impl<I> ExactSizeIterator for Skip<I> where I: ExactSizeIterator
• impl<I> ExactSizeIterator for Take<I> where I: ExactSizeIterator
• impl<I> ExactSizeIterator for Fuse<I> where I: ExactSizeIterator
• impl ExactSizeIterator for Range<usize>
• impl ExactSizeIterator for Range<u8>
• impl ExactSizeIterator for Range<u16>
• impl ExactSizeIterator for Range<u32>
• impl ExactSizeIterator for Range<isize>
• impl ExactSizeIterator for Range<i8>
• impl ExactSizeIterator for Range<i16>
• impl ExactSizeIterator for Range<i32>
• impl<A> ExactSizeIterator for Item<A>
• impl<'a, A> ExactSizeIterator for Iter<'a, A>
• impl<'a, A> ExactSizeIterator for IterMut<'a, A>
• impl<A> ExactSizeIterator for IntoIter<A>
• impl<'a, T> ExactSizeIterator for Iter<'a, T>
• impl<'a, T> ExactSizeIterator for IterMut<'a, T>
• impl<T> ExactSizeIterator for IntoIter<T>
• impl<'a, T> ExactSizeIterator for Iter<'a, T>
• impl<'a, T> ExactSizeIterator for IterMut<'a, T>
• impl<'a, T> ExactSizeIterator for Windows<'a, T>
• impl<'a, T> ExactSizeIterator for Chunks<'a, T>
• impl<'a, T> ExactSizeIterator for ChunksMut<'a, T>
• impl<'a> ExactSizeIterator for Bytes<'a>
• impl<I> ExactSizeIterator for Box<I> where I: ExactSizeIterator, I: ?Sized
• impl<'a, T> ExactSizeIterator for Iter<'a, T>
• impl<T> ExactSizeIterator for IntoIter<T>
• impl<'a, T> ExactSizeIterator for Drain<'a, T> where T: 'a
• impl<'a> ExactSizeIterator for Iter<'a>
• impl<'a, K, V> ExactSizeIterator for Iter<'a, K, V>
• impl<'a, K, V> ExactSizeIterator for IterMut<'a, K, V>
• impl<K, V> ExactSizeIterator for IntoIter<K, V>
• impl<'a, K, V> ExactSizeIterator for Keys<'a, K, V>
• impl<'a, K, V> ExactSizeIterator for Values<'a, K, V>
• impl<'a, T> ExactSizeIterator for Iter<'a, T>
• impl<T> ExactSizeIterator for IntoIter<T>
• impl<'a, A> ExactSizeIterator for Iter<'a, A>
• impl<'a, A> ExactSizeIterator for IterMut<'a, A>
• impl<'a, T> ExactSizeIterator for Iter<'a, T>
• impl<'a, T> ExactSizeIterator for IterMut<'a, T>
• impl<T> ExactSizeIterator for IntoIter<T>
• impl<'a, T> ExactSizeIterator for Drain<'a, T> where T: 'a
• impl<T> ExactSizeIterator for IntoIter<T>
• impl<'a, T> ExactSizeIterator for Drain<'a, T>
• impl ExactSizeIterator for EscapeDefault
• impl ExactSizeIterator for Args
• impl ExactSizeIterator for ArgsOs
• impl<'a, K, V> ExactSizeIterator for Iter<'a, K, V>
• impl<'a, K, V> ExactSizeIterator for IterMut<'a, K, V>
• impl<K, V> ExactSizeIterator for IntoIter<K, V>
• impl<'a, K, V> ExactSizeIterator for Keys<'a, K, V>
• impl<'a, K, V> ExactSizeIterator for Values<'a, K, V>
• impl<'a, K, V> ExactSizeIterator for Drain<'a, K, V>
• impl<'a, K> ExactSizeIterator for Iter<'a, K>
• impl<K> ExactSizeIterator for IntoIter<K>
• impl<'a, K> ExactSizeIterator for Drain<'a, K>
• impl<'a, K, V> ExactSizeIterator for Iter<'a, K, V>
• impl<'a, K, V> ExactSizeIterator for IterMut<'a, K, V>
• impl<K, V> ExactSizeIterator for IntoIter<K, V>
• impl<'a, K, V> ExactSizeIterator for Keys<'a, K, V>
• impl<'a, K, V> ExactSizeIterator for Values<'a, K, V>
• impl<'a, K, V> ExactSizeIterator for Drain<'a, K, V>
• impl<'a, K> ExactSizeIterator for Iter<'a, K>
• impl<K> ExactSizeIterator for IntoIter<K>
• impl<'a, K> ExactSizeIterator for Drain<'a, K>