Extend Enum

[Mars]

Hello everybody.
I'd like to know if there's a way, to extend an Enum, based on 
version().
I have an Enum, that holds various values, but some are 
different, in other versions. So the alternative would be to 
define the Enum several times.

> version(x)
> {
> enum example
> {
>  FOO = 1,
>  BAR = 2,
> }
> }
> else
> {
> enum example
> {
>  FOO = 1,
>  BAR = 3,
> }
> }

Is there a better way to do this? Maybe a class with static 
consts...? How should I do it?

Mars