scala.Product4

trait Product4[+T1, +T2, +T3, +T4] extends Product

Product4 is a cartesian product of 4 components.

Abstract Value Members From scala.Equals

abstract def canEqual(that: Any): Boolean

A method that should be called from every well-designed equals method that is open to be overridden in a subclass. See Programming in Scala, Chapter 28 for discussion and design.

  • that
    • the value being probed for possible equality
  • returns
    • true if this instance can possibly equal that , otherwise false
  • Definition Classes
    • Equals

(defined at scala.Equals)

Concrete Value Members From scala.Product4

abstract def _1: T1

A projection of element 1 of this Product.

  • returns
    • A projection of element 1.

(defined at scala.Product4)

def productElement(n: Int): Any

Returns the n-th projection of this product if 0 < n <= productArity, otherwise throws an IndexOutOfBoundsException .

  • n
    • number of the projection to be returned
  • returns
    • same as ._(n+1) , for example productElement(0) is the same as ._1 .
  • Definition Classes
    • Product4 → Product
  • Annotations
    • @ throws (clazz = classOf[IndexOutOfBoundsException])
  • Exceptions thrown * (defined at scala.Product4)

Full Source:

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2002-2013, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */
// GENERATED CODE: DO NOT EDIT. See scala.Function0 for timestamp.

package scala

object Product4 {
  def unapply[T1, T2, T3, T4](x: Product4[T1, T2, T3, T4]): Option[Product4[T1, T2, T3, T4]] =
    Some(x)
}

/** Product4 is a cartesian product of 4 components.
 *  @since 2.3
 */
trait Product4[+T1, +T2, +T3, +T4] extends Any with Product {
  /** The arity of this product.
   *  @return 4
   */
  override def productArity = 4

  
  /** Returns the n-th projection of this product if 0 < n <= productArity,
   *  otherwise throws an `IndexOutOfBoundsException`.
   *
   *  @param n number of the projection to be returned
   *  @return  same as `._(n+1)`, for example `productElement(0)` is the same as `._1`.
   *  @throws  IndexOutOfBoundsException
   */

  @throws(classOf[IndexOutOfBoundsException])
  override def productElement(n: Int) = n match { 
    case 0 => _1
    case 1 => _2
    case 2 => _3
    case 3 => _4
    case _ => throw new IndexOutOfBoundsException(n.toString())
 }

  /** A projection of element 1 of this Product.
   *  @return   A projection of element 1.
   */
  def _1: T1
  /** A projection of element 2 of this Product.
   *  @return   A projection of element 2.
   */
  def _2: T2
  /** A projection of element 3 of this Product.
   *  @return   A projection of element 3.
   */
  def _3: T3
  /** A projection of element 4 of this Product.
   *  @return   A projection of element 4.
   */
  def _4: T4


}