C# compiler doesn't support enum values as other enum's field initializer

[Stitchous]

this C# code

 public enum E1
 {
        Zero = 0
 }

 public enum E2
 {
        Zero = E1.Zero
  }

successfully compiles by csc, but produces following message in Nemerle project:

error : supplied value (0 :> E1) cannot be converted to int and isn't valid as enum field initializer

[Stitchous]

looks like Nemerle doesn't support this kind of enum fields initializators too

[NN---]

If you look here: https://github.com/rsdn/nemerle/blob/master/ncc/hierarchy/TypeBuilder.n#L1900 Seems enum value is not counted as constant.

[Stitchous]

sometimes it is counted as constant and even as literal but with different type than current enum underlying type, so lit.WithType (underlying_enum_type) returns None