Collections refactoring.

1 files changed, 95 insertions, 0 deletions

diff --git a/src/library/scala/collection/TraversableProxyLike.scala b/src/library/scala/collection/TraversableProxyLike.scala
new file mode 100644
index 0000000000..e667e7cc7f
--- /dev/null
+++ b/src/library/scala/collection/TraversableProxyLike.scala
@@ -0,0 +1,95 @@
+/*                     __                                               *\
+**     ________ ___   / /  ___     Scala API                            **
+**    / __/ __// _ | / /  / _ |    (c) 2003-2009, LAMP/EPFL             **
+**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
+** /____/\___/_/ |_/____/_/ | |                                         **
+**                          |/                                          **
+\*                                                                      */
+
+// $Id$
+
+
+package scala.collection
+
+import generic._
+import mutable.Buffer
+
+// Methods could be printed by  cat TraversableLike.scala | egrep '^  (override )?def'
+
+
+/** This trait implements a proxy for traversable objects. It forwards
+ *  all calls to a different traversable object
+ *
+ *  @author  Martin Odersky
+ *  @version 2.8
+ */
+trait TraversableProxyLike[+A, +This <: TraversableLike[A, This] with Traversable[A]] extends TraversableLike[A, This] with Proxy {
+  def self: This
+
+  override def foreach[B](f: A => B): Unit = self.foreach(f)
+  override def isEmpty: Boolean = self.isEmpty
+  override def nonEmpty: Boolean = self.nonEmpty
+  override def size: Int = self.size
+  override def hasDefiniteSize = self.hasDefiniteSize
+  override def ++[B >: A, That](that: Traversable[B])(implicit bf: BuilderFactory[B, That, This]): That = self.++(that)(bf)
+  override def ++[B >: A, That](that: Iterator[B])(implicit bf: BuilderFactory[B, That, This]): That = self.++(that)(bf)
+  override def map[B, That](f: A => B)(implicit bf: BuilderFactory[B, That, This]): That = self.map(f)(bf)
+  override def flatMap[B, That](f: A => Traversable[B])(implicit bf: BuilderFactory[B, That, This]): That = self.flatMap(f)(bf)
+  override def filter(p: A => Boolean): This = self.filter(p)
+  override def filterNot(p: A => Boolean): This = self.filterNot(p)
+  override def remove(p: A => Boolean): This = self.filterNot(p)
+  override def partition(p: A => Boolean): (This, This) = self.partition(p)
+  override def groupBy[K](f: A => K): Map[K, This] = self.groupBy(f)
+  override def forall(p: A => Boolean): Boolean = self.forall(p)
+  override def exists(p: A => Boolean): Boolean = self.exists(p)
+  override def count(p: A => Boolean): Int = self.count(p)
+  override def find(p: A => Boolean): Option[A] = self.find(p)
+  override def foldLeft[B](z: B)(op: (B, A) => B): B = self.foldLeft(z)(op)
+  override def /: [B](z: B)(op: (B, A) => B): B = self./:(z)(op)
+  override def foldRight[B](z: B)(op: (A, B) => B): B = self.foldRight(z)(op)
+  override def :\ [B](z: B)(op: (A, B) => B): B = self.:\(z)(op)
+  override def reduceLeft[B >: A](op: (B, A) => B): B = self.reduceLeft(op)
+  override def reduceLeftOption[B >: A](op: (B, A) => B): Option[B] = self.reduceLeftOption(op)
+  override def reduceRight[B >: A](op: (A, B) => B): B = self.reduceRight(op)
+  override def reduceRightOption[B >: A](op: (A, B) => B): Option[B] = self.reduceRightOption(op)
+  override def head: A = self.head
+  override def headOption: Option[A] = self.headOption
+  override def tail: This = self.tail
+  override def last: A = self.last
+  override def lastOption: Option[A] = self.lastOption
+  override def init: This = self.init
+  override def take(n: Int): This = self.take(n)
+  override def drop(n: Int): This = self.drop(n)
+  override def slice(from: Int, until: Int): This = self.slice(from, until)
+  override def takeWhile(p: A => Boolean): This = self.takeWhile(p)
+  override def dropWhile(p: A => Boolean): This = self.dropWhile(p)
+  override def span(p: A => Boolean): (This, This) = self.span(p)
+  override def splitAt(n: Int): (This, This) = self.splitAt(n)
+  override def copyToBuffer[B >: A](dest: Buffer[B]) = self.copyToBuffer(dest)
+  override def copyToArray[B >: A](xs: Array[B], start: Int, len: Int) = self.copyToArray(xs, start, len)
+  override def copyToArray[B >: A](xs: Array[B], start: Int) = self.copyToArray(xs, start)
+  override def toArray[B >: A: ClassManifest]: Array[B] = self.toArray
+  override def toList: List[A] = self.toList
+  override def toIterable: Iterable[A] = self.toIterable
+  override def toSequence: Sequence[A] = self.toSequence
+  override def toStream: Stream[A] = self.toStream
+  override def toSet[B >: A]: immutable.Set[B] = self.toSet
+  override def mkString(start: String, sep: String, end: String): String = self.mkString(start, sep, end)
+  override def mkString(sep: String): String = self.mkString(sep)
+  override def mkString: String = self.mkString
+  override def addString(b: StringBuilder, start: String, sep: String, end: String): StringBuilder = self.addString(b, start, sep, end)
+  override def addString(b: StringBuilder, sep: String): StringBuilder = self.addString(b, sep)
+  override def addString(b: StringBuilder): StringBuilder = self.addString(b)
+  override def stringPrefix : String = self.stringPrefix
+  override def view = self.view
+  override def view(from: Int, until: Int): TraversableView[A, This] = self.view(from, until)
+}
+
+private class TraversableProxyLikeConfirmation[+A, +This <: TraversableLike[A, This] with Traversable[A]]
+  extends TraversableProxyLike[A, Traversable[A]]
+  with interfaces.TraversableMethods[A, Traversable[A]]
+{
+  def self: This = repr.asInstanceOf[This]
+  protected[this] def newBuilder = scala.collection.Traversable.newBuilder[A]
+  // : Builder[A, This]
+}