Data.Parameterized.Some

This module provides Some, a GADT that hides a type parameter.

Documentation

data Some (f :: k -> Type)

Constructors

forall x. Some (f x)

Instances

OrdC (Some :: (k -> Type) -> Type)

Defined in Data.Parameterized.ClassesC

Methods

compareC :: (forall (x :: k0) (y :: k0). f x -> g y -> OrderingF x y) -> Some f -> Some g -> Ordering

TestEqualityC (Some :: (k -> Type) -> Type)

This instance demonstrates where the above class is useful: namely, in types with existential quantification.

Defined in Data.Parameterized.ClassesC

Methods

testEqualityC :: (forall (x :: k0) (y :: k0). f x -> f y -> Maybe (x :~: y)) -> Some f -> Some f -> Bool

FoldableF (Some :: (k -> Type) -> Type)

Defined in Data.Parameterized.Some

Methods

foldMapF :: Monoid m => (forall (s :: k0). e s -> m) -> Some e -> m

foldrF :: (forall (s :: k0). e s -> b -> b) -> b -> Some e -> b

foldlF :: (forall (s :: k0). b -> e s -> b) -> b -> Some e -> b

foldrF' :: (forall (s :: k0). e s -> b -> b) -> b -> Some e -> b

foldlF' :: (forall (s :: k0). b -> e s -> b) -> b -> Some e -> b

toListF :: (forall (tp :: k0). f tp -> a) -> Some f -> [a]

FunctorF (Some :: (k -> Type) -> Type)

Defined in Data.Parameterized.Some

Methods

fmapF :: (forall (x :: k0). f x -> g x) -> Some f -> Some g

TraversableF (Some :: (k -> Type) -> Type)

Defined in Data.Parameterized.Some

Methods

traverseF :: Applicative m => (forall (s :: k0). e s -> m (f s)) -> Some e -> m (Some f)

ShowF f => Show (Some f)

Defined in Data.Parameterized.Some

Methods

showsPrec :: Int -> Some f -> ShowS

show :: Some f -> String

showList :: [Some f] -> ShowS

TestEquality f => Eq (Some f)

Defined in Data.Parameterized.Some

Methods

(==) :: Some f -> Some f -> Bool

(/=) :: Some f -> Some f -> Bool

OrdF f => Ord (Some f)

Defined in Data.Parameterized.Some

Methods

compare :: Some f -> Some f -> Ordering

(<) :: Some f -> Some f -> Bool

(<=) :: Some f -> Some f -> Bool

(>) :: Some f -> Some f -> Bool

(>=) :: Some f -> Some f -> Bool

max :: Some f -> Some f -> Some f

min :: Some f -> Some f -> Some f

(HashableF f, TestEquality f) => Hashable (Some f)

Defined in Data.Parameterized.Some

Methods

hashWithSalt :: Int -> Some f -> Int

hash :: Some f -> Int

viewSome :: (forall tp. f tp -> r) -> Some f -> r

Project out of Some.

mapSome :: (forall tp. f tp -> g tp) -> Some f -> Some g

Apply function to inner value.

traverseSome :: Functor m => (forall tp. f tp -> m (g tp)) -> Some f -> m (Some g)

Modify the inner value.

traverseSome_ :: Functor m => (forall tp. f tp -> m ()) -> Some f -> m ()

Modify the inner value.

someLens :: (forall tp. Lens' (f tp) a) -> Lens' (Some f) a

A lens that is polymorphic in the index may be used on a value with an existentially-quantified index.