generic-aeson-0.1.0.1: Derivation of Aeson instances using GHC generics.

Safe HaskellSafe-Inferred

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 -> BoolSource

Generically test if a data type is an enumeration.

class GIsEnum f whereSource

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

Methods

gIsEnum :: Proxy (f a) -> BoolSource

Instances

GIsEnum V1 
GIsEnum U1 
GIsEnum Par1 
GIsEnum (Rec1 f) 
GIsEnum (K1 i a) 
(GIsEnum f, GIsEnum g) => GIsEnum (:+: f g) 
(GIsEnum f, GIsEnum g) => GIsEnum (:*: f g) 
GIsEnum f => GIsEnum (M1 D c f) 
GIsEnum f => GIsEnum (M1 C c f) 
GIsEnum (M1 S c a)