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Diffstat (limited to 'src/library/scalax/collection/generic/covartest/IterableForwarder.scala')
-rwxr-xr-x | src/library/scalax/collection/generic/covartest/IterableForwarder.scala | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/src/library/scalax/collection/generic/covartest/IterableForwarder.scala b/src/library/scalax/collection/generic/covartest/IterableForwarder.scala new file mode 100755 index 0000000000..9d78cb18e0 --- /dev/null +++ b/src/library/scalax/collection/generic/covartest/IterableForwarder.scala @@ -0,0 +1,61 @@ +/* __ *\ +** ________ ___ / / ___ Scala API ** +** / __/ __// _ | / / / _ | (c) 2003-2008, LAMP/EPFL ** +** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ ** +** /____/\___/_/ |_/____/_/ | | ** +** |/ ** +\* */ + +// $Id: IterableProxy.scala 15458 2008-06-28 20:23:22Z stepancheg $ + + +package scalax.collection.generic.covartest + +import collection.mutable.Buffer +import collection.immutable.{List, Stream} + +/** This trait implements a forwarder for iterable objects. It forwards + * all calls to a different iterable object, except for + * + * - toString, hashCode, equals, stringPrefix + * - newBuilder, view + * - all calls creating a new iterable objetc of the same kind + * + * The above methods are forwarded by subclass IterableProxy + * + * @author Martin Odersky + * @version 2.8 + */ +trait IterableForwarder[+A] extends Iterable[A] { + + /** The iterable object to which calls are forwarded */ + protected def underlying: Iterable[A] + + // Iterable delegates + // Iterable methods could be printed by cat IterableTemplate.scala | sed -n '/trait Iterable/,$ p' | egrep '^ (override )?def' + + override def elements = underlying.elements + override def isEmpty = underlying.isEmpty + override def hasDefiniteSize = underlying.hasDefiniteSize + override def foreach(f: A => Unit) = underlying.foreach(f) + override def forall(p: A => Boolean): Boolean = underlying.forall(p) + override def exists(p: A => Boolean): Boolean = underlying.exists(p) + override def count(p: A => Boolean): Int = underlying.count(p) + override def find(p: A => Boolean): Option[A] = underlying.find(p) + override def foldLeft[B](z: B)(op: (B, A) => B): B = underlying.foldLeft(z)(op) + override def foldRight[B](z: B)(op: (A, B) => B): B = underlying.foldRight(z)(op) + override def reduceLeft[B >: A](op: (B, A) => B): B = underlying.reduceLeft(op) + override def reduceRight[B >: A](op: (A, B) => B): B = underlying.reduceRight(op) + override def copyToBuffer[B >: A](dest: Buffer[B]) = underlying.copyToBuffer(dest) + override def copyToArray[B >: A](xs: Array[B], start: Int, len: Int) = underlying.copyToArray(xs, start, len) + override def toArray[B >: A]: Array[B] = underlying.toArray + override def toList: List[A] = underlying.toList + override def toSequence: Sequence[A] = underlying.toSequence + override def toStream: Stream[A] = underlying.toStream + override def mkString(start: String, sep: String, end: String): String = underlying.mkString(start, sep, end) + override def addString(b: StringBuilder, start: String, sep: String, end: String): StringBuilder = underlying.addString(b, start, sep, end) + + override def head: A = underlying.head + override def last: A = underlying.last + override def sameElements[B >: A](that: OrderedIterable[B]): Boolean = underlying.sameElements(that) +} |