Monad Transformers
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There are currently two sets of packages that implement similar interfaces to monad transformers, besides a third package with a similar goal but different API named MonadLib:
- MTL - Monad Transformers Library: provides concrete monad transformers like
StateT
and abstractions using multi-parameter classes with functional dependencies likeMonadState
- transformers
See also
- Monad Transformers Explained
- http://www.haskell.org/pipermail/libraries/2009-March/011415.html
- http://www.haskell.org/pipermail/libraries/2009-December/012914.html
- http://www.haskell.org/pipermail/haskell-cafe/2010-January/071842.html
- http://www.mail-archive.com/debian-haskell@lists.debian.org/msg01241.html