pub struct HashSetIterator<'self, K> {
priv iter: VecIterator<'self, Option<Bucket<K, ()>>>,
}HashSet iterator
impl<'self, K: Clone> Clone for HashSetIterator<'self, K>fn clone(&self) -> HashSetIterator<'self, K>Returns a copy of the value. The contents of owned pointers are copied to maintain uniqueness, while the contents of managed pointers are not copied.
impl<'self, K> Iterator<&'self K> for HashSetIterator<'self, K>fn next(&mut self) -> Option<&'self K>Advance the iterator and return the next value. Return None when the end is reached.
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