uniplate-1.6.12: Help writing simple, concise and fast generic operations.

Safe Haskell | None
Language | Haskell98

Data.Generics.PlateTypeable

Contents

- The Class
- The Combinators
- Orphan instances

Description

Deprecated: Use Data.Generics.Uniplate.Typeable instead

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

This module supplies a method for writing `Biplate` instances more easily.

To take an example:

    data Expr = Var Int | Neg Expr | Add Expr Expr

    instance Typeable Expr where ...

    instance (Typeable a, Uniplate a) => PlateAll Expr a where
      plateAll (Var x  ) = plate Var |- x
      plateAll (Neg x  ) = plate Neg |+ x
      plateAll (Add x y) = plate Add |+ x |+ y

    instance Uniplate Expr where
      uniplate = uniplateAll

Synopsis

- module Data.Generics.Biplate
- module Data.Typeable
- class PlateAll from to where
- uniplateAll :: PlateAll a b => a -> (Str b, Str b -> a)
- plate :: from -> Type from to
- (|+) :: (Typeable item, Typeable to, PlateAll item to) => Type (item -> from) to -> item -> Type from to
- (|-) :: Type (item -> from) to -> item -> Type from to

# Documentation

module Data.Generics.Biplate

module Data.Typeable

# The Class

class PlateAll from to where #

This class represents going from the container type to the target.

This class should only be constructed with `plate`, `|+` and `|-`

Minimal complete definition

plateAll

Methods

plateAll :: from -> Type from to #

Instances

PlateAll Bool to # |
Methods plateAll :: Bool -> Type Bool to #
PlateAll Char to # |
Methods plateAll :: Char -> Type Char to #
PlateAll Double to # |
Methods plateAll :: Double -> Type Double to #
PlateAll Float to # |
Methods plateAll :: Float -> Type Float to #
PlateAll Int to # |
Methods plateAll :: Int -> Type Int to #
PlateAll Integer to # |
Methods plateAll :: Integer -> Type Integer to #
PlateAll () to # |
Methods plateAll :: () -> Type () to #
(PlateAll from to, Typeable * from, Typeable * to, Uniplate to) => PlateAll [from] to # |
Methods plateAll :: [from] -> Type [from] to #
(PlateAll from to, Typeable * from, Typeable * to, Uniplate to) => PlateAll (Maybe from) to # |
Methods plateAll :: Maybe from -> Type (Maybe from) to #
(PlateAll a to, Typeable * a, PlateAll b to, Typeable * b, Typeable * to, Uniplate to) => PlateAll (Either a b) to # |
Methods plateAll :: Either a b -> Type (Either a b) to #
(PlateAll a to, Typeable * a, PlateAll b to, Typeable * b, Typeable * to, Uniplate to) => PlateAll (a, b) to # |
Methods plateAll :: (a, b) -> Type (a, b) to #
(PlateAll a to, Typeable * a, PlateAll b to, Typeable * b, PlateAll c to, Typeable * c, Typeable * to, Uniplate to) => PlateAll (a, b, c) to # |
Methods plateAll :: (a, b, c) -> Type (a, b, c) to #
(PlateAll a to, Typeable * a, PlateAll b to, Typeable * b, PlateAll c to, Typeable * c, PlateAll d to, Typeable * d, Typeable * to, Uniplate to) => PlateAll (a, b, c, d) to # |
Methods plateAll :: (a, b, c, d) -> Type (a, b, c, d) to #
(PlateAll a to, Typeable * a, PlateAll b to, Typeable * b, PlateAll c to, Typeable * c, PlateAll d to, Typeable * d, PlateAll e to, Typeable * e, Typeable * to, Uniplate to) => PlateAll (a, b, c, d, e) to # |
Methods plateAll :: (a, b, c, d, e) -> Type (a, b, c, d, e) to #

uniplateAll :: PlateAll a b => a -> (Str b, Str b -> a) #

This function is used to write a `Uniplate` instance from a `PlateAll` one

# The Combinators

plate :: from -> Type from to #

The main combinator used to start the chain.

The following rule can be used for optimisation:

    plate Ctor |- x == plate (Ctor x)

(|+) :: (Typeable item, Typeable to, PlateAll item to) => Type (item -> from) to -> item -> Type from to #

the field to the right may contain the target.

(|-) :: Type (item -> from) to -> item -> Type from to #

The field to the right does not contain the target. This can be used as either an optimisation, or more commonly for excluding primitives such as Int.

# Orphan instances

Uniplate Bool # |
Methods uniplate :: UniplateType Bool #
Uniplate Char # |
Methods uniplate :: UniplateType Char #
Uniplate Double # |
Methods uniplate :: UniplateType Double #
Uniplate Float # |
Methods uniplate :: UniplateType Float #
Uniplate Int # |
Methods uniplate :: UniplateType Int #
Uniplate Integer # |
Methods uniplate :: UniplateType Integer #
Uniplate () # |
Methods uniplate :: UniplateType () #
(Typeable * a, Typeable * b, Uniplate b, PlateAll a b) => Biplate a b # |
Methods biplate :: BiplateType a b #