[Haskell-beginners] Generate a list of all constructors

[Kees Bleijenberg]

In this piece of code

 

data Color = RED | BLUE | YELLOW

 

allColors :: [Color]

allColors = [RED, BLUE, YELLOW]

 

I have to remeber that if I add a Color, I have to add the color in
allColors too.  

Is there no better way to  add all possible colors in allColors?

 

Kees

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