Trait std::iter::ExactSizeIteratorStable

pub trait ExactSizeIterator: 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 uint.

Provided Methods

fn len(&self) -> usize

Return the exact length of the iterator.

Implementors

• impl<Idx: Clone + Step> ExactSizeIterator for Range<Idx>
• impl<I> ExactSizeIterator for Enumerate<I>
• impl<A, I, F> ExactSizeIterator for Inspect<A, I, F>
• impl<I> ExactSizeIterator for Rev<I>
• impl<A, B, I, F> ExactSizeIterator for Map<A, B, I, F>
• impl<A, B> ExactSizeIterator for Zip<A, B>
• impl<T, D, I> ExactSizeIterator for Cloned<I>
• 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> ExactSizeIterator for Bytes<'a>
• impl<'a, T> ExactSizeIterator for Iter<'a, T>
• impl<T> ExactSizeIterator for IntoIter<T>
• impl<'a, T: 'a> ExactSizeIterator for Drain<'a, T>
• 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: 'a> ExactSizeIterator for Drain<'a, T>
• impl<T> ExactSizeIterator for IntoIter<T>
• impl<'a, T> ExactSizeIterator for Drain<'a, T>