scala2.8.1のlibrary中でEitherが使用されている箇所

gistfile1.scala

src2.8.1\scala-library-src\scala\actors\Future.scala"  
   157,12      def awaitEither[A, B >: A](ft1: Future[A], ft2: Future[B]): B = {
src2.8.1\scala-library-src\scala\collection\immutable\List.scala"  
   549,32      def lefts[A, B](es: Iterable[Either[A, B]]) = 
   559,33      def rights[A, B](es: Iterable[Either[A, B]]) = 
   571,34      def separate[A,B](es: Iterable[Either[A, B]]): (List[A], List[B]) =
src2.8.1\scala-library-src\scala\concurrent\ops.scala"  
   28,40      private def tryCatch[A](body: => A): Either[Throwable, A] =
    31,48       private def getOrThrow[T <: Throwable, A](x: Either[T, A]): A =
   56,25       val y = new SyncVar[Either[Throwable, B]]
src2.8.1\scala-library-src\scala\concurrent\ThreadRunner.scala"  
    30,40      private def tryCatch[A](body: => A): Either[Exception, A] =
    43,30        val result = new SyncVar[Either[Exception, S]]
src2.8.1\scala-library-src\scala\util\control\Exception.scala"  
    99,37        def either[U >: T](body: => U): Either[Throwable, U] = toEither(Right(body))
   113,11        def toEither: Catch[Either[Throwable, T]] = withApply(Left(_))
   127,19        def either(): Either[Throwable, T]                    = catcher either body
   128,38        def either[U >: T](other: => U): Either[Throwable, U] = catcher either other
src2.8.1\scala-library-src\scala\util\parsing\combinator\PackratParsers.scala"  
   133,43      private case class MemoEntry[+T](var r: Either[LR,ParseResult[_]]){