# New monads

### From HaskellWiki

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It seems that the liftIO function from MonadIO can be generalized to access whatever the base of a transformer stack happens to be. So there is no need for a liftSTM, liftST, etc. |
It seems that the liftIO function from MonadIO can be generalized to access whatever the base of a transformer stack happens to be. So there is no need for a liftSTM, liftST, etc. |
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− | View [[MonadBase]]. |
+ | View [[NewMonads/MonadBase]]. |

== MonadLib == |
== MonadLib == |
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It also defines BaseM which is like MonadBase above. |
It also defines BaseM which is like MonadBase above. |
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+ | == MonadRandom == |
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+ | A simple monad transformer to allow computations in the transformed monad to generate random values. |
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+ | View [[NewMonads/MonadRandom]]. |

## Revision as of 17:16, 24 August 2006

## Contents |

## 1 MonadBase

It seems that the liftIO function from MonadIO can be generalized to access whatever the base of a transformer stack happens to be. So there is no need for a liftSTM, liftST, etc.

View NewMonads/MonadBase.

## 2 MonadLib

This is by Iavor S. Diatchki and can be found at http://www.cse.ogi.edu/~diatchki/monadLib/

It is a new version of the mtl package with transformers: ReaderT WriterT StateT ExceptT SearchT ContT

It also defines BaseM which is like MonadBase above.

## 3 MonadRandom

A simple monad transformer to allow computations in the transformed monad to generate random values.

View NewMonads/MonadRandom.