/
TraversableForwarder.scala
88 lines (81 loc) · 4.69 KB
/
TraversableForwarder.scala
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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2010, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
package scala.collection.generic
import scala.collection._
import mutable.{Buffer, StringBuilder}
import immutable.{List, Stream}
// import immutable.{List, Nil, ::, Stream}
/** <p>
* This trait implements a forwarder for traversable objects. It forwards
* all calls to a different iterable object, except for
* </p>
* <ul>
* <li><code>toString</code>, <code>hashCode</code>, <code>equals</code>,
* <code>stringPrefix</code>
* </li>
* <li><code>newBuilder</code>, <code>view</code></li>
* <li>all calls creating a new iterable object of the same kind</li>
* </ul>
* <p>
* The above methods are forwarded by subclass
* <a href="TraversableProxy.html" target="ContentFrame">
* <code>TraversableProxy</code></a>.
* </p>
*
* @author Martin Odersky
* @version 2.8
* @since 2.8
*/
trait TraversableForwarder[+A] extends Traversable[A] {
/** The iterable object to which calls are forwarded */
protected def underlying: Traversable[A]
override def foreach[B](f: A => B): Unit = underlying.foreach(f)
override def isEmpty: Boolean = underlying.isEmpty
override def nonEmpty: Boolean = underlying.nonEmpty
override def size: Int = underlying.size
override def hasDefiniteSize = underlying.hasDefiniteSize
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 /: [B](z: B)(op: (B, A) => B): B = underlying./:(z)(op)
override def foldRight[B](z: B)(op: (A, B) => B): B = underlying.foldRight(z)(op)
override def :\ [B](z: B)(op: (A, B) => B): B = underlying.:\(z)(op)
override def reduceLeft[B >: A](op: (B, A) => B): B = underlying.reduceLeft(op)
override def reduceLeftOption[B >: A](op: (B, A) => B): Option[B] = underlying.reduceLeftOption(op)
override def reduceRight[B >: A](op: (A, B) => B): B = underlying.reduceRight(op)
override def reduceRightOption[B >: A](op: (A, B) => B): Option[B] = underlying.reduceRightOption(op)
override def sum[B >: A](implicit num: Numeric[B]): B = underlying.sum(num)
override def product[B >: A](implicit num: Numeric[B]): B = underlying.product(num)
override def min[B >: A](implicit cmp: Ordering[B]): A = underlying.min(cmp)
override def max[B >: A](implicit cmp: Ordering[B]): A = underlying.max(cmp)
override def head: A = underlying.head
override def headOption: Option[A] = underlying.headOption
override def last: A = underlying.last
override def lastOption: Option[A] = underlying.lastOption
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 copyToArray[B >: A](xs: Array[B], start: Int) = underlying.copyToArray(xs, start)
override def copyToArray[B >: A](xs: Array[B]) = underlying.copyToArray(xs)
override def toArray[B >: A: ClassManifest]: Array[B] = underlying.toArray
override def toList: List[A] = underlying.toList
override def toIterable: Iterable[A] = underlying.toIterable
override def toSeq: Seq[A] = underlying.toSeq
override def toIndexedSeq[B >: A] = underlying.toIndexedSeq
override def toBuffer[B >: A] = underlying.toBuffer
override def toStream: Stream[A] = underlying.toStream
override def toSet[B >: A]: immutable.Set[B] = underlying.toSet
override def toMap[T, U](implicit ev: A <:< (T, U)): immutable.Map[T, U] = underlying.toMap(ev)
override def mkString(start: String, sep: String, end: String): String = underlying.mkString(start, sep, end)
override def mkString(sep: String): String = underlying.mkString(sep)
override def mkString: String = underlying.mkString
override def addString(b: StringBuilder, start: String, sep: String, end: String): StringBuilder = underlying.addString(b, start, sep, end)
override def addString(b: StringBuilder, sep: String): StringBuilder = underlying.addString(b, sep)
override def addString(b: StringBuilder): StringBuilder = underlying.addString(b)
}