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trait SamRepeated { def accept(a: Any*): Unit }
trait SamByName { def accept(a: => Any): (Any, Any) }
object Test extends App {
val rep: SamRepeated = (a) => println(a)
rep.accept(1)
val nam: SamByName = (a) => (a, a)
var v = 0
assert(nam.accept({v += 1; v}) == (1, 2))
assert(v == 2, "by name arg should be evaluated twice")
}
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