Indifferent Map for scala

gistfile1.scala

class IndifferentMap[K >: String with Symbol ,V](original:Map[K,V]) extends collection.MapProxy[String, V] {
  val beafed = original.map{
    case (k:Symbol,v) => k.name->v
    case (k:String, v) => k->v
  }
  override def self = beafed
  def apply(s:Symbol):V = apply(s.name)
}

val m = new IndifferentMap(Map("abc"->1))
val m2 = new IndifferentMap(Map('abc->1))

assert(m('abc) == 1)
assert(m("abc") == 1)
assert(m2('abc) == 1)
assert(m2("abc") == 1)


val m3 = new IndifferentMap(Map(1 -> 2)) // compile error
val m4 = new IndifferentMap(Map(true -> 2)) // compile error