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

[Nicolas Trangez]

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