This haskell package provides a data structure of sets that are indexed by potentially multiple indices.

sets can be created, modified, and queried in various ways.

the package is a variant of the ixset package. the ixset package makes use of run-time type information to find a suitable index on a query, resulting in possible run-time errors when no suitable index exists. in ixset-typed, the types of all indices available or tracked in the type system. thus, ixset-typed should be safer to use than ixset, but in turn requires more ghc extensions.

at the moment, the two packages are relatively compatible. as a consequence of the more precise types, a few manual tweaks are necessary when switching from one to the other, but the interface is mostly the same.

this package provides a library for the haskell programming language. see http://www.haskell.org/ for more information on haskell.