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| Data.Generics.Schemes | | Portability | non-portable | | Stability | experimental | | Maintainer | libraries@haskell.org |
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| Description |
| "Scrap your boilerplate" --- Generic programming in Haskell
See http://www.cs.vu.nl/boilerplate/. The present module provides
frequently used generic traversal schemes.
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| Synopsis |
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| Documentation |
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| everywhere :: (forall a . Data a => a -> a) -> forall a . Data a => a -> a |
| Apply a transformation everywhere in bottom-up manner |
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| everywhere' :: (forall a . Data a => a -> a) -> forall a . Data a => a -> a |
| Apply a transformation everywhere in top-down manner |
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| everywhereBut :: GenericQ Bool -> GenericT -> GenericT |
| Variation on everywhere with an extra stop condition |
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| everywhereM :: Monad m => GenericM m -> GenericM m |
| Monadic variation on everywhere |
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| somewhere :: MonadPlus m => GenericM m -> GenericM m |
| Apply a monadic transformation at least somewhere |
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| everything :: (r -> r -> r) -> GenericQ r -> GenericQ r |
| Summarise all nodes in top-down, left-to-right order |
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| listify :: Typeable r => (r -> Bool) -> GenericQ [r] |
| Get a list of all entities that meet a predicate |
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| something :: GenericQ (Maybe u) -> GenericQ (Maybe u) |
| Look up a subterm by means of a maybe-typed filter |
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| synthesize :: s -> (s -> s -> s) -> GenericQ (s -> s) -> GenericQ s |
| Bottom-up synthesis of a data structure;
1st argument z is the initial element for the synthesis;
2nd argument o is for reduction of results from subterms;
3rd argument f updates the sythesised data according to the given term
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| Produced by Haddock version 0.6 |
