type class without inheritance

typeclass.scala

abstract class Equal[T]{
  def eq(v1: T, v2: T): Boolean
}

object Equal{
  def apply[T](implicit ev: Equal[T]): Equal[T] = ev
  def equalA[T]: Equal[T] = new Equal[T] {
    def eq(v1: T, v2: T): Boolean = v1 == v2
  }

  implicit val intEqual = equalA[Int]
}

abstract class Ord[T: Equal]{
  def lowerThan(v1: T, v2: T): Boolean
  def lowerThanOEqual(v1: T, v2: T): Boolean = lowerThan(v1, v2) || Equal[T].eq(v1, v2)
  def greaterThan(v1: T, v2: T): Boolean = !lowerThan(v1, v2)
  def greaterThanOEqual(v1: T, v2: T): Boolean = greaterThan(v1, v2) || Equal[T].eq(v1, v2)
}

object Ord{
  def apply[T](implicit ev: Ord[T]): Ord[T] = ev
  def fromLowerThan[T: Equal](lth: (T, T) => Boolean): Ord[T] = new Ord[T] {
    def lowerThan(v1: T, v2: T) = lth(v1, v2)
  }

  implicit val intOrd = fromLowerThan[Int](_ < _)
}