Data.Comp.Annotation

This module defines annotations on signatures.

Documentation

data (f :&: a) e

This data type adds a constant product (annotation) to a signature.

Constructors

(f e) :&: a

Instances

DistAnn f p (:&: f p)

Functor f => Functor (:&: f a)

Foldable f => Foldable (:&: f a)

Traversable f => Traversable (:&: f a)

(ShowF f, Show p) => ShowF (:&: f p)

(ArbitraryF f, Arbitrary p) => ArbitraryF (:&: f p)

RemA (:&: f p) f

DistAnn s p s' => DistAnn (:+: f s) p (:+: (:&: f p) s')

RemA s s' => RemA (:+: (:&: f p) s) (:+: f s')

data (f :*: g) a

Formal product of signatures (functors).

Constructors

(f a) :*: (g a)

class DistAnn s p s' | s' -> s, s' -> p where

This class defines how to distribute an annotation over a sum of signatures.

Methods

injectA :: p -> s a -> s' a

Inject an annotation over a signature.

projectA :: s' a -> (s a, p)

Project an annotation from a signature.

Instances

DistAnn f p (:&: f p)

DistAnn s p s' => DistAnn (:+: f s) p (:+: (:&: f p) s')

class RemA s s' | s -> s' where

Methods

remA :: s a -> s' a

Remove annotations from a signature.

Instances

RemA (:&: f p) f

RemA s s' => RemA (:+: (:&: f p) s) (:+: f s')

liftA :: RemA s s' => (s' a -> t) -> s a -> t

Transform a function with a domain constructed from a functor to a function with a domain constructed with the same functor, but with an additional annotation.

liftA' :: (DistAnn s' p s, Functor s') => (s' a -> Cxt h s' a) -> s a -> Cxt h s a

Transform a function with a domain constructed from a functor to a function with a domain constructed with the same functor, but with an additional annotation.

stripA :: (RemA g f, Functor g) => CxtFun g f

Strip the annotations from a term over a functor with annotations.

propAnn :: (DistAnn f p f', DistAnn g p g', Functor g) => Hom f g -> Hom f' g'

Lift a term homomorphism over signatures f and g to a term homomorphism over the same signatures, but extended with annotations.

propAnnM :: (DistAnn f p f', DistAnn g p g', Functor g, Monad m) => HomM m f g -> HomM m f' g'

Lift a monadic term homomorphism over signatures f and g to a monadic term homomorphism over the same signatures, but extended with annotations.

ann :: (DistAnn f p g, Functor f) => p -> CxtFun f g

Annotate each node of a term with a constant value.

project' :: (RemA s s', s :<: f) => Cxt h f a -> Maybe (s' (Cxt h f a))