File: VaClass.scala

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scala 2.11.12-6
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import annotation.varargs

class VaClass {
  @varargs def vs(a: Int, b: String*) = println(a + b.length)
  @varargs def vi(a: Int, b: Int*) = println(a + b.sum)
  @varargs def vt[T](a: Int, b: T*) = println(a + b.length)
  @varargs def vt1[T](a: Int, b: T*): T = b.head
}