gistfile1.scala

def takeUpToNot[T](pred: (T) => Boolean): Iteratee[T, Seq[T]] = {
	def step(ok: Boolean, result: Seq[T])(i: Input[T]): Iteratee[T, Seq[T]] = i match {
		case Input.EOF | Input.Empty => Done(result, Input.EOF)
		case Input.El(e) =>
			if (ok) Cont[T, Seq[T]](i => step(pred(e), result :+ e)(i))
			else Done(result, Input.EOF)
	}
	Cont[T, Seq[T]](i => step(ok = true, Vector())(i))
}