Data.Functor.Classes

Prelude classes, lifted to unary type constructors.

Liftings of Prelude classes

class Eq1 f where

Lifting of the Eq class to unary type constructors.

Methods

eq1 :: Eq a => f a -> f a -> Bool

Instances

Eq1 []

Eq1 Maybe

Eq1 Identity

Eq a => Eq1 (Either a)

Eq a => Eq1 ((,) a)

Eq1 f => Eq1 (Reverse f)

Eq1 f => Eq1 (Backwards f)

Eq1 f => Eq1 (Lift f)

Eq a => Eq1 (Constant a)

Eq1 m => Eq1 (MaybeT m)

Eq1 m => Eq1 (ListT m)

Eq1 f => Eq1 (IdentityT f)

(Eq w, Eq1 m) => Eq1 (WriterT w m)

(Eq w, Eq1 m) => Eq1 (WriterT w m)

(Eq e, Eq1 m) => Eq1 (ErrorT e m)

(Functor f, Eq1 f, Eq1 g) => Eq1 (Compose f g)

(Eq1 f, Eq1 g) => Eq1 (Product f g)

(Eq1 f, Eq1 g) => Eq1 (Sum f g)

(Eq e, Eq1 m) => Eq1 (ExceptT e m)

class Eq1 f => Ord1 f where

Lifting of the Ord class to unary type constructors.

Methods

compare1 :: Ord a => f a -> f a -> Ordering

Instances

Ord1 []

Ord1 Maybe

Ord1 Identity

Ord a => Ord1 (Either a)

Ord a => Ord1 ((,) a)

Ord1 f => Ord1 (Reverse f)

Ord1 f => Ord1 (Backwards f)

Ord1 f => Ord1 (Lift f)

Ord a => Ord1 (Constant a)

Ord1 m => Ord1 (MaybeT m)

Ord1 m => Ord1 (ListT m)

Ord1 f => Ord1 (IdentityT f)

(Ord w, Ord1 m) => Ord1 (WriterT w m)

(Ord w, Ord1 m) => Ord1 (WriterT w m)

(Ord e, Ord1 m) => Ord1 (ErrorT e m)

(Functor f, Ord1 f, Ord1 g) => Ord1 (Compose f g)

(Ord1 f, Ord1 g) => Ord1 (Product f g)

(Ord1 f, Ord1 g) => Ord1 (Sum f g)

(Ord e, Ord1 m) => Ord1 (ExceptT e m)

class Read1 f where

Lifting of the Read class to unary type constructors.

Methods

readsPrec1 :: Read a => Int -> ReadS (f a)

Instances

Read1 []

Read1 Maybe

Read1 Identity

Read a => Read1 (Either a)

Read a => Read1 ((,) a)

Read1 f => Read1 (Reverse f)

Read1 f => Read1 (Backwards f)

Read1 f => Read1 (Lift f)

Read a => Read1 (Constant a)

Read1 m => Read1 (MaybeT m)

Read1 m => Read1 (ListT m)

Read1 f => Read1 (IdentityT f)

(Read w, Read1 m) => Read1 (WriterT w m)

(Read w, Read1 m) => Read1 (WriterT w m)

(Read e, Read1 m) => Read1 (ErrorT e m)

(Functor f, Read1 f, Read1 g) => Read1 (Compose f g)

(Read1 f, Read1 g) => Read1 (Product f g)

(Read1 f, Read1 g) => Read1 (Sum f g)

(Read e, Read1 m) => Read1 (ExceptT e m)

class Show1 f where

Lifting of the Show class to unary type constructors.

Methods

showsPrec1 :: Show a => Int -> f a -> ShowS

Instances

Show1 []

Show1 Maybe

Show1 Identity

Show a => Show1 (Either a)

Show a => Show1 ((,) a)

Show1 f => Show1 (Reverse f)

Show1 f => Show1 (Backwards f)

Show1 f => Show1 (Lift f)

Show a => Show1 (Constant a)

Show1 m => Show1 (MaybeT m)

Show1 m => Show1 (ListT m)

Show1 f => Show1 (IdentityT f)

(Show w, Show1 m) => Show1 (WriterT w m)

(Show w, Show1 m) => Show1 (WriterT w m)

(Show e, Show1 m) => Show1 (ErrorT e m)

(Functor f, Show1 f, Show1 g) => Show1 (Compose f g)

(Show1 f, Show1 g) => Show1 (Product f g)

(Show1 f, Show1 g) => Show1 (Sum f g)

(Show e, Show1 m) => Show1 (ExceptT e m)

Helper functions

readsData :: (String -> ReadS a) -> Int -> ReadS a

readsData p d is a parser for datatypes where each alternative begins with a data constructor. It parses the constructor and passes it to p. Parsers for various constructors can be constructed with readsUnary, readsUnary1 and readsBinary1, and combined with mappend from the Monoid class.

readsUnary :: Read a => String -> (a -> t) -> String -> ReadS t

readsUnary n c n' matches the name of a unary data constructor and then parses its argument using readsPrec.

readsUnary1 :: (Read1 f, Read a) => String -> (f a -> t) -> String -> ReadS t

readsUnary1 n c n' matches the name of a unary data constructor and then parses its argument using readsPrec1.

readsBinary1 :: (Read1 f, Read1 g, Read a) => String -> (f a -> g a -> t) -> String -> ReadS t

readsBinary1 n c n' matches the name of a binary data constructor and then parses its arguments using readsPrec1.

showsUnary :: Show a => String -> Int -> a -> ShowS

showsUnary n d x produces the string representation of a unary data constructor with name n and argument x, in precedence context d.

showsUnary1 :: (Show1 f, Show a) => String -> Int -> f a -> ShowS

showsUnary1 n d x produces the string representation of a unary data constructor with name n and argument x, in precedence context d.

showsBinary1 :: (Show1 f, Show1 g, Show a) => String -> Int -> f a -> g a -> ShowS

showsBinary1 n d x produces the string representation of a binary data constructor with name n and arguments x and y, in precedence context d.