Generics.RepLib.R

Basic data structure and class for representation types

Documentation

data R a where

A value of type R a is a representation of a type a.

Constructors

Int :: R Int

Char :: R Char

Integer :: R Integer

Float :: R Float

Double :: R Double

Rational :: R Rational

IOError :: R IOError

IO :: Rep a => R a -> R (IO a)

Arrow :: (Rep a, Rep b) => R a -> R b -> R (a -> b)

Data :: DT -> [Con R a] -> R a

Abstract :: DT -> R a

Equal :: (Rep a, Rep b) => R a -> R b -> R (a :=: b)

Instances

EqT R

Eq (R a)

Ord (R a)

Show (R a)

Show (MTup R l)

data Con r a where

Representation of a data constructor includes an embedding between the datatype and a list of other types as well as the representation of that list of other types.

Constructors

Con :: Emb l a -> MTup r l -> Con r a

data Emb l a

An embedding between a list of types l and a datatype a, based on a particular data constructor. The to function is a wrapper for the constructor, the from function pattern matches on the constructor.

Constructors

Emb

Fields

to :: l -> a

from :: a -> Maybe l

labels :: Maybe [String]

name :: String

fixity :: Fixity

data Fixity

Constructors

Nonfix

Infix

Fields

prec :: Int

Infixl

Fields

prec :: Int

Infixr

Fields

prec :: Int

data DT

Information about a datatype, including its fully qualified name and representation of its type arguments.

Constructors

forall l . DT String (MTup R l)

Instances

Eq DT

Ord DT

Show DT

data Nil

An empty list of types

Constructors

Nil

data a :*: l

Cons for a list of types

Constructors

a :*: l

data MTup r l where

A heterogeneous list

Constructors

MNil :: MTup r Nil

:+: :: Rep a => r a -> MTup r l -> MTup r (a :*: l)

Instances

Show (MTup R l)

class Rep a where

A class of representable types

Methods

rep :: R a

Instances

Rep Bool

Rep Char

Rep Double

Rep Float

Rep Int

Rep Integer

Rep Ordering

Rep Rational

Rep ()

Rep IOError

Rep a => Rep [a]

Rep a => Rep (IO a)

Rep a0 => Rep (Maybe a0)

(Rep a, Rep b) => Rep (a -> b)

(Rep a0, Rep b0) => Rep (Either a0 b0)

(Rep a, Rep b) => Rep (a, b)

(Rep a, Rep b) => Rep (:=: a b)

(Rep a0, Rep b0, Rep c0) => Rep (a0, b0, c0)

(Rep a0, Rep b0, Rep c0, Rep d0) => Rep (a0, b0, c0, d0)

(Rep a0, Rep b0, Rep c0, Rep d0, Rep e0) => Rep (a0, b0, c0, d0, e0)

(Rep a0, Rep b0, Rep c0, Rep d0, Rep e0, Rep f0) => Rep (a0, b0, c0, d0, e0, f0)

(Rep a0, Rep b0, Rep c0, Rep d0, Rep e0, Rep f0, Rep g0) => Rep (a0, b0, c0, d0, e0, f0, g0)

rUnitEmb :: Emb Nil ()

rUnit :: R ()

rTup2 :: forall a b. (Rep a, Rep b) => R (a, b)

rPairEmb :: Emb (a :*: (b :*: Nil)) (a, b)

rList :: forall a. Rep a => R [a]

rNilEmb :: Emb Nil [a]

rConsEmb :: Emb (a :*: ([a] :*: Nil)) [a]