uniplate-1.6.8: Help writing simple, concise and fast generic operations.

Safe HaskellNone

Data.Generics.UniplateOn

Contents

Description

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.

Synopsis

Documentation

Types

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

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]Source

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

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 -> fromSource

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

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

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

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

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

Other

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

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

Helper for writing instances

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

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