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DoubleInstances.scala
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DoubleInstances.scala
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package cats.kernel
package instances
trait DoubleInstances {
implicit val catsKernelStdOrderForDouble: Order[Double] with Hash[Double] = new DoubleOrder
implicit val catsKernelStdGroupForDouble: CommutativeGroup[Double] = new DoubleGroup
}
class DoubleGroup extends CommutativeGroup[Double] {
def combine(x: Double, y: Double): Double = x + y
def empty: Double = 0D
def inverse(x: Double): Double = -x
override def remove(x: Double, y: Double): Double = x - y
}
class DoubleOrder extends Order[Double] with Hash[Double] {
def hash(x: Double): Int = x.hashCode()
def compare(x: Double, y: Double): Int =
java.lang.Double.compare(x, y)
override def eqv(x: Double, y: Double): Boolean = x == y
override def neqv(x: Double, y: Double): Boolean = x != y
override def gt(x: Double, y: Double): Boolean = x > y
override def gteqv(x: Double, y: Double): Boolean = x >= y
override def lt(x: Double, y: Double): Boolean = x < y
override def lteqv(x: Double, y: Double): Boolean = x <= y
override def min(x: Double, y: Double): Double =
Math.min(x, y)
override def max(x: Double, y: Double): Double =
Math.max(x, y)
}