Safe Haskell | None |
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Compos compatibility layer. This module serves as a drop-in replacement in some situations for some of the Compos operations. Only the single-type traversals are supported, on normal algebraic data types. Users should also import either Data.Generics.Uniplate.Data or Data.Generics.Uniplate.Direct.

Compos is described in the paper: "A Pattern for Almost Compositional Functions" by Bjorn Bringert and Aarne Ranta.

- class Uniplate a => Compos a
- composOp :: Uniplate a => (a -> a) -> a -> a
- composOpM :: (Uniplate a, Monad m) => (a -> m a) -> a -> m a
- composOpM_ :: (Uniplate a, Monad m) => (a -> m ()) -> a -> m ()
- composOpMonoid :: (Uniplate a, Monoid m) => (a -> m) -> a -> m
- composOpMPlus :: (Uniplate a, MonadPlus m) => (a -> m b) -> a -> m b
- composOpFold :: Uniplate a => b -> (b -> b -> b) -> (a -> b) -> a -> b

# Documentation

composOpM_ :: (Uniplate a, Monad m) => (a -> m ()) -> a -> m ()Source

`composOpM_ == ``composOpFold`

(return ()) (>>)

composOpMonoid :: (Uniplate a, Monoid m) => (a -> m) -> a -> mSource

`composOpMonoid = ``composOpFold`

mempty mappend

composOpMPlus :: (Uniplate a, MonadPlus m) => (a -> m b) -> a -> m bSource

`composOpMPlus = ``composOpFold`

mzero mplus

composOpFold :: Uniplate a => b -> (b -> b -> b) -> (a -> b) -> a -> bSource