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 HTH, Martijn. _______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
