Generalized equivalent to doing [minBound..maxBound] but on complex types.
λ :m +Data.Enumerable.Generic
λ :set -XDeriveGeneric
λ data Flag = Flag Bool Word8 deriving (Show, Generic)
λ instance Enumerable Flag
λ instance Default Flag where def = Flag False 0
λ allEnum :: [Flag]
[Flag False 0,Flag True 0,Flag False 1, (..snip..) Flag False 255,Flag True 255]