| Copyright | (c) The University of Glasgow, CWI 2001--2004 |
|---|---|
| License | BSD-style (see the LICENSE file) |
| Maintainer | generics@haskell.org |
| Stability | experimental |
| Portability | non-portable (local universal quantification) |
| Safe Haskell | Safe-Inferred |
| Language | Haskell98 |
Data.Generics.Twins
Contents
Description
"Scrap your boilerplate" --- Generic programming in Haskell See http://www.cs.uu.nl/wiki/GenericProgramming/SYB. The present module provides support for multi-parameter traversal, which is also demonstrated with generic operations like equality.
- gfoldlAccum :: Data d => (forall e r. Data e => a -> c (e -> r) -> e -> (a, c r)) -> (forall g. a -> g -> (a, c g)) -> a -> d -> (a, c d)
- gmapAccumT :: Data d => (forall e. Data e => a -> e -> (a, e)) -> a -> d -> (a, d)
- gmapAccumM :: (Data d, Monad m) => (forall e. Data e => a -> e -> (a, m e)) -> a -> d -> (a, m d)
- gmapAccumQl :: Data d => (r -> r' -> r) -> r -> (forall e. Data e => a -> e -> (a, r')) -> a -> d -> (a, r)
- gmapAccumQr :: Data d => (r' -> r -> r) -> r -> (forall e. Data e => a -> e -> (a, r')) -> a -> d -> (a, r)
- gmapAccumQ :: Data d => (forall e. Data e => a -> e -> (a, q)) -> a -> d -> (a, [q])
- gmapAccumA :: forall b d a. (Data d, Applicative a) => (forall e. Data e => b -> e -> (b, a e)) -> b -> d -> (b, a d)
- 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)
Generic folds and maps that also accumulate
gfoldlAccum :: Data d => (forall e r. Data e => a -> c (e -> r) -> e -> (a, c r)) -> (forall g. a -> g -> (a, c g)) -> a -> d -> (a, c d) Source
gfoldl with accumulation
gmapAccumT :: Data d => (forall e. Data e => a -> e -> (a, e)) -> a -> d -> (a, d) Source
gmapT with accumulation
gmapAccumM :: (Data d, Monad m) => (forall e. Data e => a -> e -> (a, m e)) -> a -> d -> (a, m d) Source
gmapM with accumulation
gmapAccumQl :: Data d => (r -> r' -> r) -> r -> (forall e. Data e => a -> e -> (a, r')) -> a -> d -> (a, r) Source
gmapQl with accumulation
gmapAccumQr :: Data d => (r' -> r -> r) -> r -> (forall e. Data e => a -> e -> (a, r')) -> a -> d -> (a, r) Source
gmapQr with accumulation
gmapAccumQ :: Data d => (forall e. Data e => a -> e -> (a, q)) -> a -> d -> (a, [q]) Source
gmapQ with accumulation
gmapAccumA :: forall b d a. (Data d, Applicative a) => (forall e. Data e => b -> e -> (b, a e)) -> b -> d -> (b, a d) Source
Applicative version
Mapping combinators for twin traversal
gzipWithM :: Monad m => GenericQ (GenericM m) -> GenericQ (GenericM m) Source
Twin map for monadic transformation