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/* NSC -- new Scala compiler
* Copyright 2005-2010 LAMP/EPFL
* @author Martin Odersky
*/
package scala.tools.nsc
package util
/** A common class for lightweight sets.
*/
abstract class Set[T <: AnyRef] {
def findEntry(x: T): T
def addEntry(x: T): Unit
def iterator: Iterator[T]
def foreach[U](f: T => U): Unit = iterator foreach f
def apply(x: T): Boolean = contains(x)
@deprecated("use `iterator' instead") def elements = iterator
def contains(x: T): Boolean =
findEntry(x) ne null
def toList = iterator.toList
}
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