Add empty IArrays

Author: nicolasstucki

library/src-bootstrapped/scala/IArray.scala

@@ -48,6 +48,16 @@ object IArray {
    */
   def empty[T: ClassTag]: IArray[T] = new Array[T](0).asInstanceOf
 
+  def emptyBooleanIArray = Array.emptyBooleanArray.asInstanceOf[IArray[Boolean]]
+  def emptyByteIArray    = Array.emptyByteArray.asInstanceOf[IArray[Byte]]
+  def emptyCharIArray    = Array.emptyCharArray.asInstanceOf[IArray[Char]]
+  def emptyDoubleIArray  = Array.emptyDoubleArray.asInstanceOf[IArray[Double]]
+  def emptyFloatIArray   = Array.emptyFloatArray.asInstanceOf[IArray[Float]]
+  def emptyIntIArray     = Array.emptyIntArray.asInstanceOf[IArray[Int]]
+  def emptyLongIArray    = Array.emptyLongArray.asInstanceOf[IArray[Long]]
+  def emptyShortIArray   = Array.emptyShortArray.asInstanceOf[IArray[Short]]
+  def emptyObjectIArray  = Array.emptyObjectArray.asInstanceOf[IArray[Object]]
+
   /** An immutable array with given elements.
    */
   def apply[T: ClassTag](xs: T*): IArray[T] = Array(xs: _*).asInstanceOf

library/src/scala/runtime/DynamicTuple.scala

@@ -185,7 +185,7 @@ object DynamicTuple {
   }
 
   def dynamicToIArray(self: Tuple): IArray[Object] = (self: Any) match {
-    case self: Unit => Array.emptyObjectArray.asInstanceOf[IArray[Object]]
+    case self: Unit => Array.emptyObjectArray.asInstanceOf[IArray[Object]] // TODO use IArray.emptyObjectIArray
     case self: TupleXXL => self.elems
     case self: Product => productToArray(self).asInstanceOf[IArray[Object]]
   }