@hackage ixset-typed0.1.3

Efficient relational queries on Haskell sets.

Create and query sets that are indexed by multiple indices.

This is a variant of the ixset package that tracks the index information via the type system. It should be safer to use than ixset, but also requires more GHC extensions.

The two packages are currently relatively compatible. Switching from one to the other requires a little bit of manual work, but not very much.