circular buffer

Circularbuffer.scala

package my.collections

class CirculrBufferIterator[T](buffer:Array[T], start:Int) extends Iterator[T]{
  var idx=0
  override def hasNext = idx<buffer.size
  override def next()={
    val i=idx
    idx=idx+1
    buffer(i)
  } 
}

class CircularBuffer[T](size:Int)(implicit m:Manifest[T]) extends Seq[T]{
  val buffer=new Array[T](size);
  var bIdx=0;
  
  override def apply (idx: Int): T = buffer((bIdx+idx) % size)

  override def length = size

  override def iterator= new CirculrBufferIterator[T](buffer, bIdx)

  def add(e:T)= {
    buffer(bIdx)=e
    bIdx=(bIdx +1) % size
  }
  
}

Would be interesting to implement CB with off-heap memory and bulk operations for byte arrays