Crate indexed_hash_set

This crate provides a bidirectional set with the following properties:

• Each entry is distinct (no double elements).
• Entries can be accessed by reference, like in a standard HashSet.
• Entries can be accessed via indices avoiding the cost of hashing the element.
• Indices are reference-counted. This means when no external index is around an entry is considered unused and will be dropped on drop_unused().
• Internal a generational arena is used to allow for effective mutation of the set.

Structs

IndexedHashSet	An indexed hash set. Can be accessed either by index of hashing.
RcIndex	A reference-counted index to an entry of the set.