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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2011, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
package scala.collection
package interfaces
import generic._
import mutable.Buffer
import scala.reflect.ClassManifest
import annotation.unchecked.uncheckedVariance
/**
* @since 2.8
*/
trait SubtractableMethods[A, +This <: Subtractable[A, This]] {
def -(elem: A): This
def -(elem1: A, elem2: A, elems: A*): This
def --(xs: TraversableOnce[A]): This
}
/**
* @since 2.8
*/
trait SetMethods[A, +This <: SetLike[A, This] with Set[A]]
extends IterableMethods[A, This]
with SubtractableMethods[A, This] {
self: Set[A] =>
// abstract
def empty: This
def contains(elem: A): Boolean
def + (elem: A): This
def - (elem: A): This
// concrete
def & (that: Set[A]): This
def &~ (that: Set[A]): This
def + (elem1: A, elem2: A, elems: A*): This
def apply(elem: A): Boolean
def diff(that: Set[A]): This
def intersect(that: Set[A]): This
def subsetOf(that: Set[A]): Boolean
def subsets(len: Int): Iterator[This]
def subsets: Iterator[This]
def union(that: Set[A]): This
def | (that: Set[A]): This
}
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