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package dotty
import scala.annotation.Annotation
package object tools {
class sharable extends Annotation
class unshared extends Annotation
val ListOfNil = Nil :: Nil
/** True if two lists have the same length. Since calling length on linear sequences
* is O(n), it is an inadvisable way to test length equality.
*/
final def sameLength[T](xs: List[T], ys: List[T]): Boolean = xs match {
case _ :: xs1 =>
ys match {
case _ :: ys1 => sameLength(xs1, ys1)
case _ => false
}
case _ => ys.isEmpty
}
}
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