Move this iterator to the next element in the hash table bucket.
Declared in <bslstl_hashtablebucketiterator.h>
HashTableBucketIterator<VALUE_TYPE, DIFFERENCE_TYPE>&
operator++();
Return a reference providing modifiable access to this iterator. The behavior is undefined unless the iterator refers to a valid (not yet erased) element in a bucket. Note that this iterator is invalidated when the underlying hash table is rehashed.
reference providing modifiable access to this iterator