private def canCastFromString()

in spark/src/main/scala/org/apache/comet/expressions/CometCast.scala [111:147]
33 lines of code
13 McCabe index (conditional complexity)

  private def canCastFromString(
      toType: DataType,
      timeZoneId: Option[String],
      evalMode: CometEvalMode.Value): SupportLevel = {
    toType match {
      case DataTypes.BooleanType =>
        Compatible()
      case DataTypes.ByteType | DataTypes.ShortType | DataTypes.IntegerType |
          DataTypes.LongType =>
        Compatible()
      case DataTypes.BinaryType =>
        Compatible()
      case DataTypes.FloatType | DataTypes.DoubleType =>
        // https://github.com/apache/datafusion-comet/issues/326
        Incompatible(
          Some(
            "Does not support inputs ending with 'd' or 'f'. Does not support 'inf'. " +
              "Does not support ANSI mode."))
      case _: DecimalType =>
        // https://github.com/apache/datafusion-comet/issues/325
        Incompatible(
          Some("Does not support inputs ending with 'd' or 'f'. Does not support 'inf'. " +
            "Does not support ANSI mode. Returns 0.0 instead of null if input contains no digits"))
      case DataTypes.DateType =>
        // https://github.com/apache/datafusion-comet/issues/327
        Compatible(Some("Only supports years between 262143 BC and 262142 AD"))
      case DataTypes.TimestampType if timeZoneId.exists(tz => tz != "UTC") =>
        Incompatible(Some(s"Cast will use UTC instead of $timeZoneId"))
      case DataTypes.TimestampType if evalMode == "ANSI" =>
        Incompatible(Some("ANSI mode not supported"))
      case DataTypes.TimestampType =>
        // https://github.com/apache/datafusion-comet/issues/328
        Incompatible(Some("Not all valid formats are supported"))
      case _ =>
        Unsupported
    }
  }