New monads
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A simple monad transformer to allow computations in the transformed monad to generate random values. | A simple monad transformer to allow computations in the transformed monad to generate random values. | ||
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View [[NewMonads/MonadRandom]]. | View [[NewMonads/MonadRandom]]. | ||
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| + | == MonadSupply == | ||
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| + | Here is a simple monad/monad transformer for computations which consume values from a (finite or infinite) supply. Note that due to pattern matching, running out of supply in a non-MonadZero monad will cause an error. | ||
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| + | View [[NewMonads/MonadSupply]]. | ||
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| + | == MonadUndo == | ||
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| + | Here is a modified state monad transformer for keeping track of undo/redo states automatically. | ||
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| + | View [[NewMonads/MonadUndo]]. | ||
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| + | == MonadUnique == | ||
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| + | This is a simple (trivial) monad transformer for supplying unique integer values to an algorithm. | ||
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| + | View [[NewMonads/MonadUnique]]. | ||
Revision as of 17:28, 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.
4 MonadSupply
Here is a simple monad/monad transformer for computations which consume values from a (finite or infinite) supply. Note that due to pattern matching, running out of supply in a non-MonadZero monad will cause an error.
View NewMonads/MonadSupply.
5 MonadUndo
Here is a modified state monad transformer for keeping track of undo/redo states automatically.
View NewMonads/MonadUndo.
6 MonadUnique
This is a simple (trivial) monad transformer for supplying unique integer values to an algorithm.
View NewMonads/MonadUnique.
