Getting a list of all possible data type values in Haskell

Question

If I have a data type say:

data Color = Red | Yellow | Green

Is there a way I can turn this into a list of type [Color] getting all possible values? [Red, Yellow, Green]

Perhaps this is a complete anti pattern?

question from:https://stackoverflow.com/questions/4299319/getting-a-list-of-all-possible-data-type-values-in-haskell

Answer 1

data Color = Red
           | Yellow
           | Green
           deriving Enum

allColors = [Red ..]