This idea would have been more valuble if I came up with it before D 2.009 came out, but I still post it.

One thing that bug me is that you have to use commas instead of semicolons. The solution that struck me was to have element in a sequence separated by commas and unrelated items separated by semicolons. Element that are separated by commas would have to have homogenus type (this would prevent sudden changes of type apon switching form an earlier version).

Examples

enum { a = 1U, b = 2 }
typeof(a) == typeof(b);

enum { a = 1; b }
b == 0;

Advantages of this syntax is that enums form version other than 2.009, won't have their meaning changed.