UDA's for enum values?

[JS]

I would like to do something like

enum e
{
  @(string) p,
  @(int) i
}
class a
{
   mixin(generatePropertiesFromEnum!e);
}

which would produce the result

interface a
{
    @property string p();
    @property int i();
}

I can generate the properties without issue but I can't seem to 
attach properties to elements in the enum. I guess this is a 
"inverse-feature" feature of D?