Control.Monad.Fix

Portability	portable
Stability	experimental
Maintainer	libraries@haskell.org

Description

The Fix monad.

Inspired by the paper Functional Programming with Overloading and Higher-Order Polymorphism, Mark P Jones (http://www.cse.ogi.edu/~mpj) Advanced School of Functional Programming, 1995.

class (Monad m) => MonadFix m where

Methods

mfix :: (a -> m a) -> m a

Instances

(Error e) => MonadFix (Either e)

(MonadFix m, Error e) => MonadFix (ErrorT e m)

MonadFix Maybe

MonadFix IO

MonadFix Identity

(Monoid w) => MonadFix (RWS r w s)

(Monoid w, MonadFix m) => MonadFix (RWST r w s m)

MonadFix (-> r)

MonadFix (Reader r)

(MonadFix m) => MonadFix (ReaderT r m)

MonadFix (ST s)

MonadFix (State s)

(MonadFix m) => MonadFix (StateT s m)

(Monoid w) => MonadFix (Writer w)

(Monoid w, MonadFix m) => MonadFix (WriterT w m)

fix :: (a -> a) -> a

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