Type inference for Array's element

ArrayElementType.scala

scala> def newa[T:Manifest](e: Class[T]) = {println(manifest[T].erasure); new Array[T](10)}
newa: [T](e: Class[T])(implicit evidence$1: Manifest[T])Array[T]

scala> newa(classOf[Byte])
byte
res45: Array[Byte] = Array(0, 0, 0, 0, 0, 0, 0, 0, 0, 0)

scala> val a = classOf[Byte]
a: java.lang.Class[Byte] = byte

scala> newa(a)              
byte
res46: Array[Byte] = Array(0, 0, 0, 0, 0, 0, 0, 0, 0, 0)

scala> def c(i:Int): Class[_] = i match {case 1 => classOf[Byte]; case 2 => classOf[String]}
c: (i: Int)Class[_]

scala> c(1)
res49: java.lang.Class[_] = byte

scala> newa(c(1))
class java.lang.Object
res50: Array[_] = Array(null, null, null, null, null, null, null, null, null, null)

scala> c(2)
res54: java.lang.Class[_] = class java.lang.String

scala> newa(c(2))
class java.lang.Object
res53: Array[_] = Array(null, null, null, null, null, null, null, null, null, null)