Safe Haskell	Safe
Language	Haskell98

Generics.Generic.IsEnum

Description

Test if a data type is an enumeration (only zero-argument constructors) generically using GHC.Generics.

Synopsis

Documentation

isEnum :: forall a. (Generic a, GIsEnum (Rep a)) => Proxy a -> Bool #

Generically test if a data type is an enumeration.

class GIsEnum f where #

Class for testing if the functors from GHC.Generics are enumerations. You generally don't need to give any custom instances. Just call isEnum.

Minimal complete definition

Methods

Instances

GIsEnum Par1 #
Instance details Defined in Generics.Generic.IsEnum Methods gIsEnum :: Proxy (Par1 a) -> Bool #
GIsEnum (V1 :: * -> *) #
Instance details Defined in Generics.Generic.IsEnum Methods gIsEnum :: Proxy (V1 a) -> Bool #
GIsEnum (U1 :: * -> *) #
Instance details Defined in Generics.Generic.IsEnum Methods gIsEnum :: Proxy (U1 a) -> Bool #
GIsEnum (Rec1 f) #
Instance details Defined in Generics.Generic.IsEnum Methods gIsEnum :: Proxy (Rec1 f a) -> Bool #
GIsEnum (K1 i a :: * -> *) #
Instance details Defined in Generics.Generic.IsEnum Methods gIsEnum :: Proxy (K1 i a a0) -> Bool #
(GIsEnum f, GIsEnum g) => GIsEnum (f :+: g) #
Instance details Defined in Generics.Generic.IsEnum Methods gIsEnum :: Proxy ((f :+: g) a) -> Bool #
(GIsEnum f, GIsEnum g) => GIsEnum (f :*: g) #
Instance details Defined in Generics.Generic.IsEnum Methods gIsEnum :: Proxy ((f :*: g) a) -> Bool #
GIsEnum f => GIsEnum (M1 D c f) #
Instance details Defined in Generics.Generic.IsEnum Methods gIsEnum :: Proxy (M1 D c f a) -> Bool #
GIsEnum f => GIsEnum (M1 C c f) #
Instance details Defined in Generics.Generic.IsEnum Methods gIsEnum :: Proxy (M1 C c f a) -> Bool #
GIsEnum (M1 S c a) #
Instance details Defined in Generics.Generic.IsEnum Methods gIsEnum :: Proxy (M1 S c a a0) -> Bool #