TypeClassExample.scala

object TypeClassExample {

  trait UnicodeOrdered[T] {
    def ≤(i:T,j:T): Boolean
  }

  object UnicodeOrdered {
    implicit object UnicodeOrderedInt extends UnicodeOrdered[Int] {
      def ≤(i:Int,j:Int): Boolean = i <= j
    }

    implicit object UnicodeOrderedLong extends UnicodeOrdered[Long] {
      def ≤(i:Long,j:Long): Boolean = i <= j
    }
  }

  object UnicodeOrderedOps {
    implicit class EnrichedUnicodeOrderedOps[T](content: T)(implicit m:UnicodeOrdered[T]) {
      def ≤(v:T) = m.≤(content,v)
    }
  }
}

TypeClassExampleConsole

scala> import TypeClassExample._, UnicodeOrderedOps._
import TypeClassExample._
import UnicodeOrderedOps._

scala> 1 ≤ 2
res0: Boolean = true

scala> 1L ≤ 2
res1: Boolean = true

scala> 1.0 ≤ 2
<console>:14: error: could not find implicit value for parameter m: misc.TypeClassExample.UnicodeOrdered[AnyVal]
              1.0 ≤ 2
              ^