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• standard-abstractions.scala

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io.reactors.protocol.standard-abstractions.scala Maven / Gradle / Ivy

package io.reactors
package protocol






trait StandardAbstractions {
  /** Represents a stamped object.
   *
   *  @tparam T    type of the stamped object
   */
  sealed trait Stamp[T] {
    def isEmpty: Boolean
    def nonEmpty: Boolean
    def stamp: Long
  }

  object Stamp {
    /** The empty case of a stamped value.
     */
    case class None[T]() extends Stamp[T] {
      def isEmpty = true
      def nonEmpty = false
      def stamp = -1
    }

    /** Non-empty case of the stamped value.
     *
     * @param x       the underlying object
     * @param stamp   the stamp of this stamped value
     */
    case class Some[T](x: T, stamp: Long) extends Stamp[T] {
      def isEmpty = false
      def nonEmpty = true
    }
  }
}