output

int 1,2,3
long 1,2,3

Process finished with exit code 0

TypeclassOverload.scala

trait A[T] {
  def name: String
}

object A {
  implicit object Aint extends A[Int] { def name = "int" }
  implicit object Along extends A[Long] { def name = "long" }
}

class C {
  def x[T: A](ts: Seq[T]) = println(s"${implicitly[A[T]].name} ${ts.mkString(",")}")
}

object D {
  def main(args: Array[String]): Unit = {
    val c = new C
    c.x(List(1, 2, 3))
    c.x(List(1L, 2L, 3L))
  }
}