Safe Haskell	None
Language	Haskell2010

Optics.ReversedPrism

Contents

Formation
Introduction
Elimination
Computation
Subtyping

Description

A ReversedPrism is a backwards Prism, i.e. a ReversedPrism s t a b is equivalent to a Prism b a t s. These are typically produced by calling re on a Prism. They are distinguished from a Getter so that re . re on a Prism returns a Prism.

Synopsis

type ReversedPrism s t a b = Optic A_ReversedPrism NoIx s t a b
type ReversedPrism' s a = Optic' A_ReversedPrism NoIx s a
data A_ReversedPrism :: OpticKind

Formation

type ReversedPrism s t a b = Optic A_ReversedPrism NoIx s t a b Source #

Type synonym for a type-modifying reversed prism.

type ReversedPrism' s a = Optic' A_ReversedPrism NoIx s a Source #

Type synonym for a type-preserving reversed prism.

Introduction

There is no canonical introduction form for ReversedPrism, but you can use re to construct one from a Prism:

(\ f g -> re (prism f g)) :: (s -> a) -> (b -> Either a t) -> ReversedPrism s t a b

Elimination

A ReversedPrism is a Getter, so you can specialise types to obtain:

view :: ReversedPrism' s a -> s -> a

There is no reversed matching defined, but it is definable using re:

matching . re :: ReversedPrism s t a b -> b -> Either a t

Computation

view          $ re (prism f g) ≡ f
matching . re $ re (prism f g) ≡ g

Subtyping

data A_ReversedPrism :: OpticKind Source #

Tag for a reversed prism.

Instances

Instances details

ReversibleOptic A_ReversedPrism Source #
Instance details Defined in Optics.Re Associated Types type ReversedOptic A_ReversedPrism = (r :: Type) Source # Methods re :: forall (is :: IxList) s t a b. AcceptsEmptyIndices "re" is => Optic A_ReversedPrism is s t a b -> Optic (ReversedOptic A_ReversedPrism) is b a t s Source #
Is A_ReversedPrism A_Fold Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: forall (p :: Type -> Type -> Type -> Type) r. (Constraints A_ReversedPrism p => r) -> Constraints A_Fold p => r Source #
Is A_ReversedPrism An_AffineFold Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: forall (p :: Type -> Type -> Type -> Type) r. (Constraints A_ReversedPrism p => r) -> Constraints An_AffineFold p => r Source #
Is A_ReversedPrism A_Getter Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: forall (p :: Type -> Type -> Type -> Type) r. (Constraints A_ReversedPrism p => r) -> Constraints A_Getter p => r Source #
Is An_Iso A_ReversedPrism Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: forall (p :: Type -> Type -> Type -> Type) r. (Constraints An_Iso p => r) -> Constraints A_ReversedPrism p => r Source #
k ~ A_Fold => JoinKinds A_Fold A_ReversedPrism k Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods joinKinds :: forall (p :: Type -> Type -> Type -> Type) r. ((Constraints A_Fold p, Constraints A_ReversedPrism p) => r) -> Constraints k p => r Source #
k ~ An_AffineFold => JoinKinds An_AffineFold A_ReversedPrism k Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods joinKinds :: forall (p :: Type -> Type -> Type -> Type) r. ((Constraints An_AffineFold p, Constraints A_ReversedPrism p) => r) -> Constraints k p => r Source #
k ~ A_Getter => JoinKinds A_Getter A_ReversedPrism k Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods joinKinds :: forall (p :: Type -> Type -> Type -> Type) r. ((Constraints A_Getter p, Constraints A_ReversedPrism p) => r) -> Constraints k p => r Source #
k ~ A_Fold => JoinKinds A_ReversedPrism A_Fold k Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods joinKinds :: forall (p :: Type -> Type -> Type -> Type) r. ((Constraints A_ReversedPrism p, Constraints A_Fold p) => r) -> Constraints k p => r Source #
k ~ An_AffineFold => JoinKinds A_ReversedPrism An_AffineFold k Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods joinKinds :: forall (p :: Type -> Type -> Type -> Type) r. ((Constraints A_ReversedPrism p, Constraints An_AffineFold p) => r) -> Constraints k p => r Source #
k ~ A_Getter => JoinKinds A_ReversedPrism A_Getter k Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods joinKinds :: forall (p :: Type -> Type -> Type -> Type) r. ((Constraints A_ReversedPrism p, Constraints A_Getter p) => r) -> Constraints k p => r Source #
k ~ A_ReversedPrism => JoinKinds A_ReversedPrism A_ReversedPrism k Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods joinKinds :: forall (p :: Type -> Type -> Type -> Type) r. ((Constraints A_ReversedPrism p, Constraints A_ReversedPrism p) => r) -> Constraints k p => r Source #
k ~ A_Fold => JoinKinds A_ReversedPrism A_Traversal k Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods joinKinds :: forall (p :: Type -> Type -> Type -> Type) r. ((Constraints A_ReversedPrism p, Constraints A_Traversal p) => r) -> Constraints k p => r Source #
k ~ An_AffineFold => JoinKinds A_ReversedPrism An_AffineTraversal k Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods joinKinds :: forall (p :: Type -> Type -> Type -> Type) r. ((Constraints A_ReversedPrism p, Constraints An_AffineTraversal p) => r) -> Constraints k p => r Source #
k ~ An_AffineFold => JoinKinds A_ReversedPrism A_Prism k Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods joinKinds :: forall (p :: Type -> Type -> Type -> Type) r. ((Constraints A_ReversedPrism p, Constraints A_Prism p) => r) -> Constraints k p => r Source #
k ~ A_Getter => JoinKinds A_ReversedPrism A_Lens k Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods joinKinds :: forall (p :: Type -> Type -> Type -> Type) r. ((Constraints A_ReversedPrism p, Constraints A_Lens p) => r) -> Constraints k p => r Source #
k ~ A_ReversedPrism => JoinKinds A_ReversedPrism An_Iso k Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods joinKinds :: forall (p :: Type -> Type -> Type -> Type) r. ((Constraints A_ReversedPrism p, Constraints An_Iso p) => r) -> Constraints k p => r Source #
k ~ A_Fold => JoinKinds A_Traversal A_ReversedPrism k Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods joinKinds :: forall (p :: Type -> Type -> Type -> Type) r. ((Constraints A_Traversal p, Constraints A_ReversedPrism p) => r) -> Constraints k p => r Source #
k ~ An_AffineFold => JoinKinds An_AffineTraversal A_ReversedPrism k Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods joinKinds :: forall (p :: Type -> Type -> Type -> Type) r. ((Constraints An_AffineTraversal p, Constraints A_ReversedPrism p) => r) -> Constraints k p => r Source #
k ~ An_AffineFold => JoinKinds A_Prism A_ReversedPrism k Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods joinKinds :: forall (p :: Type -> Type -> Type -> Type) r. ((Constraints A_Prism p, Constraints A_ReversedPrism p) => r) -> Constraints k p => r Source #
k ~ A_Getter => JoinKinds A_Lens A_ReversedPrism k Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods joinKinds :: forall (p :: Type -> Type -> Type -> Type) r. ((Constraints A_Lens p, Constraints A_ReversedPrism p) => r) -> Constraints k p => r Source #
k ~ A_ReversedPrism => JoinKinds An_Iso A_ReversedPrism k Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods joinKinds :: forall (p :: Type -> Type -> Type -> Type) r. ((Constraints An_Iso p, Constraints A_ReversedPrism p) => r) -> Constraints k p => r Source #
ToReadOnly A_ReversedPrism s t a b Source #
Instance details Defined in Optics.ReadOnly Associated Types type ReadOnlyOptic A_ReversedPrism Source # Methods getting :: forall (is :: IxList). Optic A_ReversedPrism is s t a b -> Optic' (ReadOnlyOptic A_ReversedPrism) is s a Source #
(Functor f, f ~ g, s ~ t, a ~ b) => MappingOptic A_ReversedPrism f g s t a b Source #
Instance details Defined in Optics.Mapping Associated Types type MappedOptic A_ReversedPrism Source # Methods mapping :: forall (is :: IxList). AcceptsEmptyIndices "mapping" is => Optic A_ReversedPrism is s t a b -> Optic (MappedOptic A_ReversedPrism) is (f s) (g t) (f a) (g b) Source #
type ReversedOptic A_ReversedPrism Source #
Instance details Defined in Optics.Re type ReversedOptic A_ReversedPrism = A_Prism
type ReadOnlyOptic A_ReversedPrism Source #
Instance details Defined in Optics.ReadOnly type ReadOnlyOptic A_ReversedPrism = A_Getter
type MappedOptic A_ReversedPrism Source #
Instance details Defined in Optics.Mapping type MappedOptic A_ReversedPrism = A_Getter

ReversedPrism in the optics hierarchy