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| Data.Generics.Twins | | Portability | non-portable (local universal quantification) | | 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 support for multi-parameter traversal, which is also
demonstrated with generic operations like equality.
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| Synopsis |
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| gfoldlAccum :: Data d => (forall d r . Data d => a -> c (d -> r) -> d -> (a, c r)) -> (forall g . a -> g -> (a, c g)) -> a -> d -> (a, c d) | | | gmapAccumT :: Data d => (forall d . Data d => a -> d -> (a, d)) -> a -> d -> (a, d) | | | gmapAccumM :: (Data d, Monad m) => (forall d . Data d => a -> d -> (a, m d)) -> a -> d -> (a, m d) | | | gmapAccumQl :: Data d => (r -> r' -> r) -> r -> (forall d . Data d => a -> d -> (a, r')) -> a -> d -> (a, r) | | | gmapAccumQr :: Data d => (r' -> r -> r) -> r -> (forall d . Data d => a -> d -> (a, r')) -> a -> d -> (a, r) | | | gmapAccumQ :: Data d => (forall d . Data d => a -> d -> (a, q)) -> a -> d -> (a, [q]) | | | gzipWithT :: GenericQ GenericT -> GenericQ GenericT | | | gzipWithM :: Monad m => GenericQ (GenericM m) -> GenericQ (GenericM m) | | | gzipWithQ :: GenericQ (GenericQ r) -> GenericQ (GenericQ [r]) | | | geq :: Data a => a -> a -> Bool | | | gzip :: GenericQ (GenericM Maybe) -> GenericQ (GenericM Maybe) |
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| Generic folds and maps that also accumulate
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| gfoldlAccum :: Data d => (forall d r . Data d => a -> c (d -> r) -> d -> (a, c r)) -> (forall g . a -> g -> (a, c g)) -> a -> d -> (a, c d) |
| gfoldl with accumulation
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| gmapAccumT :: Data d => (forall d . Data d => a -> d -> (a, d)) -> a -> d -> (a, d) |
| gmapT with accumulation
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| gmapAccumM :: (Data d, Monad m) => (forall d . Data d => a -> d -> (a, m d)) -> a -> d -> (a, m d) |
| gmapM with accumulation
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| gmapAccumQl :: Data d => (r -> r' -> r) -> r -> (forall d . Data d => a -> d -> (a, r')) -> a -> d -> (a, r) |
| gmapQl with accumulation
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| gmapAccumQr :: Data d => (r' -> r -> r) -> r -> (forall d . Data d => a -> d -> (a, r')) -> a -> d -> (a, r) |
| gmapQr with accumulation
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| gmapAccumQ :: Data d => (forall d . Data d => a -> d -> (a, q)) -> a -> d -> (a, [q]) |
| gmapQ with accumulation
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| Mapping combinators for twin traversal
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| gzipWithT :: GenericQ GenericT -> GenericQ GenericT |
| Twin map for transformation
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| gzipWithM :: Monad m => GenericQ (GenericM m) -> GenericQ (GenericM m) |
| Twin map for monadic transformation
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| gzipWithQ :: GenericQ (GenericQ r) -> GenericQ (GenericQ [r]) |
| Twin map for queries
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| Typical twin traversals
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| geq :: Data a => a -> a -> Bool |
| Generic equality: an alternative to "deriving Eq"
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| gzip :: GenericQ (GenericM Maybe) -> GenericQ (GenericM Maybe) |
| Generic zip controlled by a function with type-specific branches
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| Produced by Haddock version 0.8 |
