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• FiniteDurationInstances.scala

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cats.kernel.instances.FiniteDurationInstances.scala Maven / Gradle / Ivy

package cats.kernel
package instances

import java.util.concurrent.TimeUnit

import scala.concurrent.duration.{Duration, FiniteDuration}

trait FiniteDurationInstances {
  implicit val catsKernelStdOrderForFiniteDuration: Order[FiniteDuration]
    with Hash[FiniteDuration]
    with LowerBounded[FiniteDuration]
    with UpperBounded[FiniteDuration] = new FiniteDurationOrder
  implicit val catsKernelStdGroupForFiniteDuration: CommutativeGroup[FiniteDuration] = new FiniteDurationGroup
}

trait FiniteDurationBounded extends LowerBounded[FiniteDuration] with UpperBounded[FiniteDuration] {
  override def minBound: FiniteDuration = FiniteDuration(-Long.MaxValue, TimeUnit.NANOSECONDS)
  override def maxBound: FiniteDuration = FiniteDuration(Long.MaxValue, TimeUnit.NANOSECONDS)
}

class FiniteDurationOrder extends Order[FiniteDuration] with Hash[FiniteDuration] with FiniteDurationBounded { self =>
  def hash(x: FiniteDuration): Int = x.hashCode()

  def compare(x: FiniteDuration, y: FiniteDuration): Int = x.compare(y)

  override def eqv(x: FiniteDuration, y: FiniteDuration): Boolean = x == y
  override def neqv(x: FiniteDuration, y: FiniteDuration): Boolean = x != y
  override def gt(x: FiniteDuration, y: FiniteDuration): Boolean = x > y
  override def gteqv(x: FiniteDuration, y: FiniteDuration): Boolean = x >= y
  override def lt(x: FiniteDuration, y: FiniteDuration): Boolean = x < y
  override def lteqv(x: FiniteDuration, y: FiniteDuration): Boolean = x <= y

  override def min(x: FiniteDuration, y: FiniteDuration): FiniteDuration = x.min(y)
  override def max(x: FiniteDuration, y: FiniteDuration): FiniteDuration = x.max(y)

  override val partialOrder: PartialOrder[FiniteDuration] = self
}

class FiniteDurationGroup extends CommutativeGroup[FiniteDuration] {
  def empty: FiniteDuration = Duration.Zero
  def inverse(x: FiniteDuration): FiniteDuration = -x
  def combine(x: FiniteDuration, y: FiniteDuration): FiniteDuration = x + y
  override def remove(x: FiniteDuration, y: FiniteDuration): FiniteDuration = x - y
}