CSV Parser in scala

CSVImplicits.scala

object CSVImplicits {

  implicit def toCSVIterator(it: Iterator[String]): toCSVIterator = new toCSVIterator(it)

  class toCSVIterator(it: Iterator[String]) {
    def asCSV: CSVIterator = new CSVIterator(it)
  }

}

CSVIterator.scala

class CSVIterator(it: Iterator[String]) extends Iterator[List[String]] {

  val DOUBLE_QUOTATION: Char = '"'

  def hasNext() = it.hasNext

  @scala.annotation.tailrec
  private def parseLine(line: List[Char], inQuotation: Boolean = false, nextField: String = "", result: List[String] = Nil): List[String] = {
    line match {
      case Nil => {
        if (inQuotation) {
          parseLine(it.next.toList, inQuotation, nextField + "\n", result)
        } else {
          result ::: nextField :: Nil
        }
      }
      case '"' :: '"' :: ',' :: rest => {
        parseLine(rest, inQuotation, "", result ::: "" :: Nil)
      }
      case '"' :: '"' :: rest => {
        parseLine(rest, inQuotation, nextField + '"', result)
      }
      case '"' :: rest => {
        parseLine(rest, !inQuotation, nextField, result)
      }
      case ',' :: rest if inQuotation=> {
        parseLine(rest, inQuotation, nextField + ',', result)
      }
      case ',' :: rest => {
        parseLine(rest, inQuotation, "", result ::: nextField :: Nil)
      }
      case c :: rest => {
        parseLine(rest, inQuotation, nextField + c, result)
      }
    }
  }

  def next() = parseLine(it.next.toList)

}

Main.scala

object Main extends App {

  val data = """|a,b,c,d
                |a,b,,c
                |a,b,"",c
                |a,b,c,"de"
                |a,b,c,"d""e"
                |a,b,c,"d
                |e"
                |a,b,"c,c",d
                |""".stripMargin

  import CSVImplicits._

  io.Source.fromString(data).getLines.asCSV.foreach(println)

  /* output:
   List(a, b, c, d)
   List(a, b, , c)
   List(a, b, , c)
   List(a, b, c, de)
   List(a, b, c, d"e)
   List(a, b, c, d
   e)
   List(a, b, c,c, d)
   */

}