mozilla/rust — pull request #7815 by blake2-ppc (2013-07-16 02:04:18+00:00)
Title: Iterators for Set operations in Hashmap

Implement set difference, sym. difference, intersection and union using Iterators.

The set methods are left since they are part of the Set trait. A grep over the tree indicates that the four hashset operations have no users at all.

Also remove HashMap::mutate_values since it is unused, replaced by .mut_iter(), and not part of a trait.