puzzler

gistfile1.txt

import scala.collection.immutable._

case class Foo(s: String)

// what do you expect?
implicit val ordering = Ordering[String]
val tree = TreeMap.empty ++ (1 to 100).map { i => Foo(i.toString) -> i } 
tree.getClass

// compared to
implicit val ordering = new Ordering[Foo] { def compare(a: Foo, b: Foo): Int = 0 }
val tree = TreeMap.empty ++ (1 to 100).map { i => Foo(i.toString) -> i } 
tree.getClass

I'd like this a little better as "what is the type of tree" instead of "what does getClass say" since it's really a types problem not a runtime problem