Safe Haskell	None
Language	Haskell2010

Optics.Internal.Optic.Subtyping

Description

Instances to implement the subtyping hierarchy between optics.

This module is intended for internal use only, and may change without warning in subsequent releases.

Synopsis

class Is k l where
- implies :: proxy k l p -> (Constraints k p => r) -> Constraints l p => r
type family Join (k :: *) (l :: *) where ...

Documentation

class Is k l where Source #

Subtyping relationship between kinds of optics.

An instance of Is k l means that any Optic k can be used as an Optic l. For example, we have an Is A_Lens A_Traversal instance, but not Is A_Traversal A_Lens.

This class needs instances for all possible combinations of tags.

Methods

implies :: proxy k l p -> (Constraints k p => r) -> Constraints l p => r Source #

Witness of the subtyping relationship.

Instances

Is k k Source #	Every kind of optic can be used as itself.
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy k k p -> (Constraints k p -> r) -> Constraints k p -> r Source #
(TypeError ((ShowType k :<>: Text " cannot be used as ") :<>: ShowType l) :: Constraint) => Is k l Source #	Overlappable instance for a custom type error.
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy k l p -> (Constraints k p -> r) -> Constraints l p -> r Source #
Is A_ReversedLens A_Review Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy A_ReversedLens A_Review p -> (Constraints A_ReversedLens p -> r) -> Constraints A_Review p -> r Source #
Is An_AffineFold A_Fold Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy An_AffineFold A_Fold p -> (Constraints An_AffineFold p -> r) -> Constraints A_Fold p -> r Source #
Is A_Getter A_Fold Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy A_Getter A_Fold p -> (Constraints A_Getter p -> r) -> Constraints A_Fold p -> r Source #
Is A_Getter An_AffineFold Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy A_Getter An_AffineFold p -> (Constraints A_Getter p -> r) -> Constraints An_AffineFold p -> r Source #
Is A_ReversedPrism A_Fold Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy A_ReversedPrism A_Fold p -> (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 :: proxy A_ReversedPrism An_AffineFold p -> (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 :: proxy A_ReversedPrism A_Getter p -> (Constraints A_ReversedPrism p -> r) -> Constraints A_Getter p -> r Source #
Is A_Traversal A_Fold Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy A_Traversal A_Fold p -> (Constraints A_Traversal p -> r) -> Constraints A_Fold p -> r Source #
Is A_Traversal A_Setter Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy A_Traversal A_Setter p -> (Constraints A_Traversal p -> r) -> Constraints A_Setter p -> r Source #
Is An_AffineTraversal A_Fold Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy An_AffineTraversal A_Fold p -> (Constraints An_AffineTraversal p -> r) -> Constraints A_Fold p -> r Source #
Is An_AffineTraversal An_AffineFold Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy An_AffineTraversal An_AffineFold p -> (Constraints An_AffineTraversal p -> r) -> Constraints An_AffineFold p -> r Source #
Is An_AffineTraversal A_Setter Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy An_AffineTraversal A_Setter p -> (Constraints An_AffineTraversal p -> r) -> Constraints A_Setter p -> r Source #
Is An_AffineTraversal A_Traversal Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy An_AffineTraversal A_Traversal p -> (Constraints An_AffineTraversal p -> r) -> Constraints A_Traversal p -> r Source #
Is A_Prism A_Review Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy A_Prism A_Review p -> (Constraints A_Prism p -> r) -> Constraints A_Review p -> r Source #
Is A_Prism A_Fold Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy A_Prism A_Fold p -> (Constraints A_Prism p -> r) -> Constraints A_Fold p -> r Source #
Is A_Prism An_AffineFold Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy A_Prism An_AffineFold p -> (Constraints A_Prism p -> r) -> Constraints An_AffineFold p -> r Source #
Is A_Prism A_Setter Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy A_Prism A_Setter p -> (Constraints A_Prism p -> r) -> Constraints A_Setter p -> r Source #
Is A_Prism A_Traversal Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy A_Prism A_Traversal p -> (Constraints A_Prism p -> r) -> Constraints A_Traversal p -> r Source #
Is A_Prism An_AffineTraversal Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy A_Prism An_AffineTraversal p -> (Constraints A_Prism p -> r) -> Constraints An_AffineTraversal p -> r Source #
Is A_Lens A_Fold Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy A_Lens A_Fold p -> (Constraints A_Lens p -> r) -> Constraints A_Fold p -> r Source #
Is A_Lens An_AffineFold Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy A_Lens An_AffineFold p -> (Constraints A_Lens p -> r) -> Constraints An_AffineFold p -> r Source #
Is A_Lens A_Getter Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy A_Lens A_Getter p -> (Constraints A_Lens p -> r) -> Constraints A_Getter p -> r Source #
Is A_Lens A_Setter Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy A_Lens A_Setter p -> (Constraints A_Lens p -> r) -> Constraints A_Setter p -> r Source #
Is A_Lens A_Traversal Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy A_Lens A_Traversal p -> (Constraints A_Lens p -> r) -> Constraints A_Traversal p -> r Source #
Is A_Lens An_AffineTraversal Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy A_Lens An_AffineTraversal p -> (Constraints A_Lens p -> r) -> Constraints An_AffineTraversal p -> r Source #
Is An_Iso A_Review Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy An_Iso A_Review p -> (Constraints An_Iso p -> r) -> Constraints A_Review p -> r Source #
Is An_Iso A_ReversedLens Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy An_Iso A_ReversedLens p -> (Constraints An_Iso p -> r) -> Constraints A_ReversedLens p -> r Source #
Is An_Iso A_Fold Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy An_Iso A_Fold p -> (Constraints An_Iso p -> r) -> Constraints A_Fold p -> r Source #
Is An_Iso An_AffineFold Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy An_Iso An_AffineFold p -> (Constraints An_Iso p -> r) -> Constraints An_AffineFold p -> r Source #
Is An_Iso A_Getter Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy An_Iso A_Getter p -> (Constraints An_Iso p -> r) -> Constraints A_Getter p -> r Source #
Is An_Iso A_ReversedPrism Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy An_Iso A_ReversedPrism p -> (Constraints An_Iso p -> r) -> Constraints A_ReversedPrism p -> r Source #
Is An_Iso A_Setter Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy An_Iso A_Setter p -> (Constraints An_Iso p -> r) -> Constraints A_Setter p -> r Source #
Is An_Iso A_Traversal Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy An_Iso A_Traversal p -> (Constraints An_Iso p -> r) -> Constraints A_Traversal p -> r Source #
Is An_Iso An_AffineTraversal Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy An_Iso An_AffineTraversal p -> (Constraints An_Iso p -> r) -> Constraints An_AffineTraversal p -> r Source #
Is An_Iso A_Prism Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy An_Iso A_Prism p -> (Constraints An_Iso p -> r) -> Constraints A_Prism p -> r Source #
Is An_Iso A_Lens Source #
Instance details Defined in Optics.Internal.Optic.Subtyping Methods implies :: proxy An_Iso A_Lens p -> (Constraints An_Iso p -> r) -> Constraints A_Lens p -> r Source #

type family Join (k :: *) (l :: *) where ... Source #

Computes the least upper bound of two optics kinds.

Join k l represents the least upper bound of an Optic k and an Optic l. This means in particular that composition of an Optic k and an Optic k will yield an Optic (Join k l).

Equations

Join An_Iso A_ReversedLens = A_ReversedLens
Join An_Iso A_ReversedPrism = A_ReversedPrism
Join An_Iso A_Prism = A_Prism
Join An_Iso A_Review = A_Review
Join An_Iso A_Lens = A_Lens
Join An_Iso A_Getter = A_Getter
Join An_Iso An_AffineTraversal = An_AffineTraversal
Join An_Iso An_AffineFold = An_AffineFold
Join An_Iso A_Traversal = A_Traversal
Join An_Iso A_Fold = A_Fold
Join An_Iso A_Setter = A_Setter
Join A_ReversedLens An_Iso = A_ReversedLens
Join A_ReversedLens A_Prism = A_Review
Join A_ReversedLens A_Review = A_Review
Join A_ReversedPrism An_Iso = A_ReversedPrism
Join A_ReversedPrism A_Prism = An_AffineFold
Join A_ReversedPrism A_Lens = A_Getter
Join A_ReversedPrism A_Getter = A_Getter
Join A_ReversedPrism An_AffineTraversal = An_AffineFold
Join A_ReversedPrism An_AffineFold = An_AffineFold
Join A_ReversedPrism A_Traversal = A_Fold
Join A_ReversedPrism A_Fold = A_Fold
Join A_Prism An_Iso = A_Prism
Join A_Prism A_ReversedLens = A_Review
Join A_Prism A_ReversedPrism = An_AffineFold
Join A_Prism A_Review = A_Review
Join A_Prism A_Lens = An_AffineTraversal
Join A_Prism A_Getter = An_AffineFold
Join A_Prism An_AffineTraversal = An_AffineTraversal
Join A_Prism An_AffineFold = An_AffineFold
Join A_Prism A_Traversal = A_Traversal
Join A_Prism A_Fold = A_Fold
Join A_Prism A_Setter = A_Setter
Join A_Review An_Iso = A_Review
Join A_Review A_ReversedLens = A_Review
Join A_Review A_Prism = A_Review
Join A_Lens An_Iso = A_Lens
Join A_Lens A_ReversedPrism = A_Getter
Join A_Lens A_Prism = An_AffineTraversal
Join A_Lens A_Getter = A_Getter
Join A_Lens An_AffineTraversal = An_AffineTraversal
Join A_Lens An_AffineFold = An_AffineFold
Join A_Lens A_Traversal = A_Traversal
Join A_Lens A_Fold = A_Fold
Join A_Lens A_Setter = A_Setter
Join A_Getter An_Iso = A_Getter
Join A_Getter A_ReversedPrism = A_Getter
Join A_Getter A_Prism = An_AffineFold
Join A_Getter A_Lens = A_Getter
Join A_Getter An_AffineTraversal = An_AffineFold
Join A_Getter An_AffineFold = An_AffineFold
Join A_Getter A_Traversal = A_Fold
Join A_Getter A_Fold = A_Fold
Join An_AffineTraversal An_Iso = An_AffineTraversal
Join An_AffineTraversal A_ReversedPrism = An_AffineFold
Join An_AffineTraversal A_Prism = An_AffineTraversal
Join An_AffineTraversal A_Lens = An_AffineTraversal
Join An_AffineTraversal A_Getter = An_AffineFold
Join An_AffineTraversal An_AffineFold = An_AffineFold
Join An_AffineTraversal A_Traversal = A_Traversal
Join An_AffineTraversal A_Fold = A_Fold
Join An_AffineTraversal A_Setter = A_Setter
Join An_AffineFold An_Iso = An_AffineFold
Join An_AffineFold A_ReversedPrism = An_AffineFold
Join An_AffineFold A_Prism = An_AffineFold
Join An_AffineFold A_Lens = An_AffineFold
Join An_AffineFold A_Getter = An_AffineFold
Join An_AffineFold An_AffineTraversal = An_AffineFold
Join An_AffineFold A_Traversal = A_Fold
Join An_AffineFold A_Fold = A_Fold
Join A_Traversal An_Iso = A_Traversal
Join A_Traversal A_ReversedPrism = A_Fold
Join A_Traversal A_Prism = A_Traversal
Join A_Traversal A_Lens = A_Traversal
Join A_Traversal A_Getter = A_Fold
Join A_Traversal An_AffineTraversal = A_Traversal
Join A_Traversal An_AffineFold = A_Fold
Join A_Traversal A_Fold = A_Fold
Join A_Traversal A_Setter = A_Setter
Join A_Fold An_Iso = A_Fold
Join A_Fold A_ReversedPrism = A_Fold
Join A_Fold A_Prism = A_Fold
Join A_Fold A_Lens = A_Fold
Join A_Fold A_Getter = A_Fold
Join A_Fold An_AffineTraversal = A_Fold
Join A_Fold An_AffineFold = A_Fold
Join A_Fold A_Traversal = A_Fold
Join A_Setter An_Iso = A_Setter
Join A_Setter A_Prism = A_Setter
Join A_Setter A_Lens = A_Setter
Join A_Setter An_AffineTraversal = A_Setter
Join A_Setter A_Traversal = A_Setter
Join k k = k
Join k l = TypeError ((ShowType k :<>: Text " cannot be composed with ") :<>: ShowType l)