Intelligent enums

[Ignacious via Digitalmars-d-learn]

On Thursday, 19 January 2017 at 02:59:04 UTC, Ignacious wrote:
> I have the need to create an enum flag like structure to 
> specify certain properties of a type easily.
>
> e.g.,
>
> enum properties
> {
>    Red,
>    Blue,
>    Hot,
>    Sexy,
>    Active,
>    ...
> }
>
> But some properties will be mutually exclusive. I would like to 
> contain all those rules for in the enum itself for obvious 
> reasons(encapsulation).
>
> I guess I'm going to be told to use static and structs, but I'm 
> hoping for a more elegant solution.

I should be clear that I'm using these as flags using EumToFlags 
and I want to prevent certain flags from betting set in certain 
combinations that are invalid.