[Haskell-cafe] Enum to String, and back?

Martijn van Steenbergen martijn at van.steenbergen.nl
Wed Apr 15 15:17:26 EDT 2009

Hi Michael,

michael rice wrote:
> Can one as easily establish a reverse relationship, i.e., convert a 
> String type like "Red" back to its corresponding Color type?
> So that
> "Red" :: [Char] -> Red :: Color

Yes, simply add Read to your list of to be derived type classes. Then 
you can say:

 > read "Red" :: Color



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