- extensions: MagicHash, ExistentialQuantification, Rank2Types,
- ScopedTypeVariables, UnboxedTuples,
- ForeignFunctionInterface, UnliftedFFITypes,
- DeriveDataTypeable, GeneralizedNewtypeDeriving,
- FlexibleInstances, StandaloneDeriving,
- PatternGuards, EmptyDataDecls, NoImplicitPrelude
-
- if impl(ghc < 6.10)
- -- PatternSignatures was deprecated in 6.10
- extensions: PatternSignatures