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 V1 #
Methods gIsEnum :: Proxy * (V1 a) -> Bool #
GIsEnum U1 #
Methods gIsEnum :: Proxy * (U1 a) -> Bool #
GIsEnum Par1 #
Methods gIsEnum :: Proxy * (Par1 a) -> Bool #
GIsEnum (Rec1 f) #
Methods gIsEnum :: Proxy * (Rec1 f a) -> Bool #
GIsEnum (K1 i a) #
Methods gIsEnum :: Proxy * (K1 i a a) -> Bool #
(GIsEnum f, GIsEnum g) => GIsEnum ((:+:) f g) #
Methods gIsEnum :: Proxy * ((f :+: g) a) -> Bool #
(GIsEnum f, GIsEnum g) => GIsEnum ((:*:) f g) #
Methods gIsEnum :: Proxy * ((f :*: g) a) -> Bool #
GIsEnum f => GIsEnum (M1 D c f) #
Methods gIsEnum :: Proxy * (M1 D c f a) -> Bool #
GIsEnum f => GIsEnum (M1 C c f) #
Methods gIsEnum :: Proxy * (M1 C c f a) -> Bool #
GIsEnum (M1 S c a) #
Methods gIsEnum :: Proxy * (M1 S c a a) -> Bool #