Allow Conditional Compilation Inside Enum Declaration

[monkyyy]

On Saturday, 30 March 2024 at 14:57:00 UTC, IchorDev wrote:
> To declare an enum type that may or may not have one or more 
> members depending on conditional compilation statements 
> requires duplicating the entire enum:
> ```d
> static if(cond){
> 	enum A{
> 		x,y,z,w,
> 	}
> }else{
> 	enum A{
> 		x,y,z,
> 	}
> }
> ```
>
> For an enum type with many members—or many conditionals—this 
> quickly becomes an insane amount of repetition.
>
> The logical solution is to just allow conditional compilation 
> statements inside enums:
> ```d
> enum A{
> 	x,y,z,
>     static if(cond){
> 		w,
> 	}
> }
> ```

As a specif case or for all lists?

Could you do this for functions `foo(static if(bar){1},2)`?

is changing the meaning of {} nessery or should it be for single 
elements?
`enum A{x,y,z, static if(cond) w}`