massive new collections checkin.

1 files changed, 50 insertions, 0 deletions

diff --git a/src/library/scala/collection/generic/SequenceForwarder.scala b/src/library/scala/collection/generic/SequenceForwarder.scala
new file mode 100755
index 0000000000..bf92128d41
--- /dev/null
+++ b/src/library/scala/collection/generic/SequenceForwarder.scala
@@ -0,0 +1,50 @@
+/*                     __                                               *\
+**     ________ ___   / /  ___     Scala API                            **
+**    / __/ __// _ | / /  / _ |    (c) 2003-2009, LAMP/EPFL             **
+**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
+** /____/\___/_/ |_/____/_/ | |                                         **
+**                          |/                                          **
+\*                                                                      */
+
+// $Id: SeqProxy.scala 15458 2008-06-28 20:23:22Z stepancheg $
+
+
+package scala.collection.generic
+
+/** This class implements a forwarder for sequences. It forwards
+ *  all calls to a different sequence object except for
+ *
+ *    - toString, hashCode, equals, stringPrefix
+ *    - newBuilder, view, toSequence
+ *    - all calls creating a new sequence of the same kind
+ *
+ *  The above methods are forwarded by subclass SequenceProxy
+ *
+ *  @author  Martin Odersky
+ *  @version 2.8
+ */
+trait SequenceForwarder[+A] extends Sequence[A] with IterableForwarder[A] {
+
+  protected override def underlying: Sequence[A]
+
+  // PartialFunction delegates
+
+  override def apply(i: Int): A = underlying.apply(i)
+  override def isDefinedAt(x: Int): Boolean = underlying.isDefinedAt(x)
+
+  // Sequence delegates
+  // Sequence methods could be printed by  cat SequenceTemplate.scala | sed -n '/trait Seq/,$ p' | egrep '^  (override )?def'
+
+  override def length: Int = underlying.length
+  override def lengthCompare(l: Int) = underlying lengthCompare l
+  override def segmentLength(p: A => Boolean, from: Int): Int = underlying.segmentLength(p, from)
+  override def prefixLength(p: A => Boolean) = underlying.prefixLength(p)
+  override def indexWhere(p: A => Boolean, from: Int): Int = underlying.indexWhere(p, from)
+  override def indexOf[B >: A](elem: B, from: Int): Int = underlying.indexOf(elem, from)
+  override def reversedElements: Iterator[A] = underlying.reversedElements
+  override def startsWith[B](that: Sequence[B], offset: Int): Boolean = underlying.startsWith(that, offset)
+  override def endsWith[B](that: Sequence[B]): Boolean = underlying.endsWith(that)
+  override def indexOfSeq[B >: A](that: Sequence[B]): Int = underlying.indexOfSeq(that)
+  override def contains(elem: Any): Boolean = underlying.contains(elem)
+  override def indices: Range = underlying.indices
+}