Scala enumeration to int

Is there a way to identify that a given object is an Enumerati开发者_运维知识库on value?

x.isInstanceOf[Enumeration.$Value] doesn't seem to work, and from what I understand of path-dependent types, shouldn't.

I'd like to write a function that given any Enumeration value, returns its id. Alternatively, an implicit that converts the Enumeration to Int would also be great.

x.isInstanceOf[Enumeration#Value] works for me. From the specification, Section 3.2.2 "Type Projection".

Class scala.Enumeration.Value has a member field 'id' which is the internal integer value. If not specifically specified, it starts from 0.

scala> object Weekday extends Enumeration {           
     | val Mon, Tue, Wedn, Thur, Fri, Sat, Sun = Value
     | }
defined module Weekday

scala> Weekday.Mon.id
res5: Int = 0