Scala custom datatype detection using regex parser

CustomTypeInference.scala

object CustomTypeInference {

  def main(args: Array[String]) = {
    val input_string_list = List("22-12-2016","2.334e10","2.345","-1234","-1","1.e10","25/12/16","21-21-16","21/21/2016")


    // Date format of the type can be detected: DD-MM-YYYY | DD-MM-YY | DD/MM/YYYY | DD/MM/YY
    val dateRegex = """([0-9]{2}-[0-9]{2}-[0-9]{4}|[0-9]{2}-[0-9]{2}-[0-9]{2}|[0-9]{2}/[0-9]{2}/[0-9]{4}|[0-9]{2}/[0-9]{2}/[0-9]{2})"""
    val timeRegex = """([0-9]{2}:[0-9]{2}:[0-9]{2}.[0-9]{3})"""

    //Numerical datatype
    val numRegex = """(\-?[0-9]*\.?[0-9]*e?[0-9]*)"""

    val NumberFmt = numRegex.r
    val DateFmt = dateRegex.r
    val DateTimeFmt = (dateRegex + " " + timeRegex).r


    def get(s: String) = s match {
      case DateFmt(d) => "Date"
      case DateTimeFmt(d,t) => "DateTime"
      case NumberFmt(n) => "Number"
      case _ => "String"
    }

    input_string_list foreach { x =>
      println(get(x))
    }

  }

}