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package scala
package reflect
package internal
import Depth._
final class Depth private (val depth: Int) extends AnyVal with Ordered[Depth] {
def max(that: Depth): Depth = if (this < that) that else this
def decr(n: Int): Depth = if (isAnyDepth) this else Depth(depth - n)
def incr(n: Int): Depth = if (isAnyDepth) this else Depth(depth + n)
def decr: Depth = decr(1)
def incr: Depth = incr(1)
def isNegative = depth < 0
def isZero = depth == 0
def isAnyDepth = this == AnyDepth
def compare(that: Depth): Int = if (depth < that.depth) -1 else if (this == that) 0 else 1
override def toString = s"Depth($depth)"
}
object Depth {
// A don't care value for the depth parameter in lubs/glbs and related operations.
final val AnyDepth = new Depth(Int.MinValue)
final val Zero = new Depth(0)
@inline final def apply(depth: Int): Depth = if (depth < 0) AnyDepth else new Depth(depth)
}
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