Copyright | (c) Ross Paterson 2013 |
---|---|

License | BSD-style (see the file LICENSE) |

Maintainer | ross@soi.city.ac.uk |

Stability | experimental |

Portability | portable |

Safe Haskell | Safe |

Language | Haskell98 |

Prelude classes, lifted to unary type constructors.

- class Eq1 f where
- class Eq1 f => Ord1 f where
- class Read1 f where
- readsPrec1 :: Read a => Int -> ReadS (f a)

- class Show1 f where
- showsPrec1 :: Show a => Int -> f a -> ShowS

- readsData :: (String -> ReadS a) -> Int -> ReadS a
- readsUnary :: Read a => String -> (a -> t) -> String -> ReadS t
- readsUnary1 :: (Read1 f, Read a) => String -> (f a -> t) -> String -> ReadS t
- readsBinary1 :: (Read1 f, Read1 g, Read a) => String -> (f a -> g a -> t) -> String -> ReadS t
- showsUnary :: Show a => String -> Int -> a -> ShowS
- showsUnary1 :: (Show1 f, Show a) => String -> Int -> f a -> ShowS
- showsBinary1 :: (Show1 f, Show1 g, Show a) => String -> Int -> f a -> g a -> ShowS

# Liftings of Prelude classes

Lifting of the `Eq`

class to unary type constructors.

Eq1 [] | |

Eq1 Identity | |

Eq1 Maybe | |

Eq a => Eq1 (Either a) | |

Eq a => Eq1 ((,) a) | |

Eq a => Eq1 (Constant a) | |

Eq1 f => Eq1 (Lift f) | |

Eq1 f => Eq1 (IdentityT f) | |

Eq1 m => Eq1 (ListT m) | |

Eq1 m => Eq1 (MaybeT m) | |

Eq1 f => Eq1 (Backwards f) | |

Eq1 f => Eq1 (Reverse f) | |

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

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

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

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

class Eq1 f => Ord1 f where Source

Lifting of the `Ord`

class to unary type constructors.

Ord1 [] | |

Ord1 Identity | |

Ord1 Maybe | |

Ord a => Ord1 (Either a) | |

Ord a => Ord1 ((,) a) | |

Ord a => Ord1 (Constant a) | |

Ord1 f => Ord1 (Lift f) | |

Ord1 f => Ord1 (IdentityT f) | |

Ord1 m => Ord1 (ListT m) | |

Ord1 m => Ord1 (MaybeT m) | |

Ord1 f => Ord1 (Backwards f) | |

Ord1 f => Ord1 (Reverse f) | |

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

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

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

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

Lifting of the `Read`

class to unary type constructors.

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

Read1 [] | |

Read1 Identity | |

Read1 Maybe | |

Read a => Read1 (Either a) | |

Read a => Read1 ((,) a) | |

Read a => Read1 (Constant a) | |

Read1 f => Read1 (Lift f) | |

Read1 f => Read1 (IdentityT f) | |

Read1 m => Read1 (ListT m) | |

Read1 m => Read1 (MaybeT m) | |

Read1 f => Read1 (Backwards f) | |

Read1 f => Read1 (Reverse f) | |

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

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

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

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

Lifting of the `Show`

class to unary type constructors.

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

Show1 [] | |

Show1 Identity | |

Show1 Maybe | |

Show a => Show1 (Either a) | |

Show a => Show1 ((,) a) | |

Show a => Show1 (Constant a) | |

Show1 f => Show1 (Lift f) | |

Show1 f => Show1 (IdentityT f) | |

Show1 m => Show1 (ListT m) | |

Show1 m => Show1 (MaybeT m) | |

Show1 f => Show1 (Backwards f) | |

Show1 f => Show1 (Reverse f) | |

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

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

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

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

# Helper functions

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

is a parser for datatypes where each alternative
begins with a data constructor. It parses the constructor and
passes it to `readsData`

p d`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 Source

matches the name of a unary data constructor
and then parses its argument using `readsUnary`

n c n'`readsPrec`

.

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

matches the name of a unary data constructor
and then parses its argument using `readsUnary1`

n c n'`readsPrec1`

.

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

matches the name of a binary data constructor
and then parses its arguments using `readsBinary1`

n c n'`readsPrec1`

.

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

produces the string representation of a unary data
constructor with name `showsUnary`

n d x`n`

and argument `x`

, in precedence context `d`

.

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

produces the string representation of a unary data
constructor with name `showsUnary1`

n d x`n`

and argument `x`

, in precedence context `d`

.

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

produces the string representation of a binary
data constructor with name `showsBinary1`

n d x`n`

and arguments `x`

and `y`

, in precedence
context `d`

.