Re: [Haskell-cafe] Custom Enum instance with non-consecutive indices

On Sat, 2012-11-17 at 16:52 +0200, Roman Cheplyaka wrote:

Hi Nicolas,

The simplest approach would be to use the standard (derived) Enum instance that would be used for enumerations (like [Flag1..]), and have your own functions to convert to/from magic constants.

Sure, but that kind-of defeats the purpose... fromEnum/toEnum would then return some nonsensical integer value. Nicolas