Scala example source code file (RichDouble.scala)

This example Scala source code file (RichDouble.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Scala source code examples by using tags.

All credit for the original source code belongs to scala-lang.org; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Scala tags/keywords

anyval, boolean, double, fractionalproxy, int, long, nan, richdouble

The RichDouble.scala Scala example source code

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2002-2013, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */

package scala
package runtime

final class RichDouble(val self: Double) extends AnyVal with FractionalProxy[Double] {
  protected def num = scala.math.Numeric.DoubleIsFractional
  protected def ord = scala.math.Ordering.Double
  protected def integralNum = scala.math.Numeric.DoubleAsIfIntegral

  override def doubleValue() = self
  override def floatValue()  = self.toFloat
  override def longValue()   = self.toLong
  override def intValue()    = self.toInt
  override def byteValue()   = self.toByte
  override def shortValue()  = self.toShort

  override def isWhole = {
    val l = self.toLong
    l.toDouble == self || l == Long.MaxValue && self < Double.PositiveInfinity || l == Long.MinValue && self > Double.NegativeInfinity
  }
  override def isValidByte  = self.toByte.toDouble == self
  override def isValidShort = self.toShort.toDouble == self
  override def isValidChar  = self.toChar.toDouble == self
  override def isValidInt   = self.toInt.toDouble == self
  // override def isValidLong = { val l = self.toLong; l.toDouble == self && l != Long.MaxValue }
  // override def isValidFloat = self.toFloat.toDouble == self
  // override def isValidDouble = !java.lang.Double.isNaN(self)

  def isNaN: Boolean         = java.lang.Double.isNaN(self)
  def isInfinity: Boolean    = java.lang.Double.isInfinite(self)
  def isPosInfinity: Boolean = Double.PositiveInfinity == self
  def isNegInfinity: Boolean = Double.NegativeInfinity == self

  override def abs: Double               = math.abs(self)
  override def max(that: Double): Double = math.max(self, that)
  override def min(that: Double): Double = math.min(self, that)
  override def signum: Int               = math.signum(self).toInt  // !!! NaN

  def round: Long   = math.round(self)
  def ceil: Double  = math.ceil(self)
  def floor: Double = math.floor(self)

  /** Converts an angle measured in degrees to an approximately equivalent
   *  angle measured in radians.
   *
   *  @return the measurement of the angle x in radians.
   */
  def toRadians: Double = math.toRadians(self)

  /** Converts an angle measured in radians to an approximately equivalent
   *  angle measured in degrees.
   *  @return the measurement of the angle x in degrees.
   */
  def toDegrees: Double = math.toDegrees(self)
}