Data.Generics.UniplateOn

DEPRECATED: Use Data.Generics.Uniplate.Operations instead.

This module retained Haskell 98 compatability, but users who are happy with multi-parameter type classes should look towards Data.Generics.Biplate.

The only function missing from Data.Generics.Uniplate is fold, as it can be constructed from children and has little meaning in a multi-typed setting.

All operations, apart from childrenOn should perform identically to their non On counterparts.

Documentation

module Data.Generics.Uniplate

Types

type BiplateType from to = from -> ([to], [to] -> from)

Return all the top most children of type to within from.

If from == to then this function should return the root as the single child.

Operations

Queries

universeOn :: Uniplate to => BiplateType from to -> from -> [to]

childrenOn :: Uniplate to => BiplateType from to -> from -> [to]

Return the children of a type. If to == from then it returns the original element (in contrast to children)

Transformations

transformOn :: Uniplate to => BiplateType from to -> (to -> to) -> from -> from

transformOnM :: (Monad m, Uniplate to) => BiplateType from to -> (to -> m to) -> from -> m from

rewriteOn :: Uniplate to => BiplateType from to -> (to -> Maybe to) -> from -> from

rewriteOnM :: (Monad m, Uniplate to) => BiplateType from to -> (to -> m (Maybe to)) -> from -> m from

descendOn :: Uniplate to => BiplateType from to -> (to -> to) -> from -> from

descendOnM :: (Monad m, Uniplate to) => BiplateType from to -> (to -> m to) -> from -> m from

Other

holesOn :: Uniplate to => BiplateType from to -> from -> [(to, to -> from)]

contextsOn :: Uniplate to => BiplateType from to -> from -> [(to, to -> from)]

Helper for writing instances

uniplateOnList :: BiplateType a b -> BiplateType [a] b

Used for defining instances UniplateFoo a => UniplateFoo [a]