package ScalaGo

object SimpleList:

  /**
   * Implements a basic linked list.
   *
   * @param entry entry of the list element, 'None' if not provided
   * @param next  next element of the list, 'null' if not provided
   * @tparam A type of the list's entries
   */
  class SimpleList[A](var entry: Option[A] = None, var next: SimpleList[A] = null)

  /**
   * Append an item to the SimpleList
   *
   * @param list the list
   * @param item append this item
   */
  def append[A](list: SimpleList[A], item: A): Unit = ???

  /**
   * Determines the length of the SimpleList.
   *
   * @param list the list
   * @return the length
   */
  def length[A](list: SimpleList[A]): Int = ???

  /**
   * Tests if the SimpleList contains a given element.
   *
   * Tests for equality are done via '=='.
   *
   * @param list the list
   * @param item search for this item
   * @return true if the SimpleList contains the item, false if not
   */
  def contains[A](list: SimpleList[A], item: A): Boolean = ???