Problem with implicits ...

UnitsEx2.scala

object UnitsEx2 {
  case class Quantity[T: Numeric](value: T) {
    private val num = implicitly[Numeric[T]]
    def *(m: Quantity[T]) = Quantity[T](num.times(value, m.value))
  }

  implicit def measure[T: Numeric](v: T): Quantity[T] = Quantity[T](v)
  implicit def numericToQuantity[T: Numeric](v: T): QuantityConstructor[T] = new QuantityConstructor[T](v)

  class QuantityConstructor[T: Numeric](v: T) {
    def m = Quantity[T](v)
  }
}

import UnitsEx._

(1 m) * 1 // Works
1 * (1 m) // Works