1 files changed, 97 insertions, 0 deletions
diff --git a/src/library/scalax/Tuple2.scala b/src/library/scalax/Tuple2.scala
new file mode 100755
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+++ b/src/library/scalax/Tuple2.scala
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+
+/*                     __                                               *\
+**     ________ ___   / /  ___     Scala API                            **
+**    / __/ __// _ | / /  / _ |    (c) 2002-2008, LAMP/EPFL             **
+**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
+** /____/\___/_/ |_/____/_/ | |                                         **
+**                          |/                                          **
+\*                                                                      */
+
+// $Id: Tuple2.scala 14794 2008-04-23 08:15:17Z washburn $
+
+// generated by genprod on Wed Apr 23 10:06:16 CEST 2008  (with extra methods)
+
+package scalax
+
+import annotation.unchecked.uncheckedVariance
+
+object Tuple2 {
+
+  import collection._
+  import collection.generic._
+
+  class IterableOps[CC[+B] <: Iterable[B] with IterableTemplate[CC, B @uncheckedVariance], A1, A2](tuple: (CC[A1], Iterable[A2])) {
+    def zip: CC[(A1, A2)] = {
+      val elems1 = tuple._1.elements
+      val elems2 = tuple._2.elements
+      val b = tuple._1.newBuilder[(A1, A2)]
+      while (elems1.hasNext && elems2.hasNext)
+        b += ((elems1.next, elems2.next))
+      b.result
+    }
+    def map[B](f: (A1, A2) => B): CC[B] = {
+      val elems1 = tuple._1.elements
+      val elems2 = tuple._2.elements
+      val b = tuple._1.newBuilder[B]
+      while (elems1.hasNext && elems2.hasNext)
+        b += f(elems1.next, elems2.next)
+      b.result
+    }
+    def flatMap[B](f: (A1, A2) => CC[B]): CC[B] = {
+      val elems1 = tuple._1.elements
+      val elems2 = tuple._2.elements
+      val b = tuple._1.newBuilder[B]
+      while (elems1.hasNext && elems2.hasNext)
+        b ++= f(elems1.next, elems2.next)
+      b.result
+    }
+    def foreach(f: (A1, A2) => Unit) {
+      val elems1 = tuple._1.elements
+      val elems2 = tuple._2.elements
+      while (elems1.hasNext && elems2.hasNext)
+        f(elems1.next, elems2.next)
+    }
+    def forall(p: (A1, A2) => Boolean): Boolean = {
+      val elems1 = tuple._1.elements
+      val elems2 = tuple._2.elements
+      while (elems1.hasNext && elems2.hasNext)
+        if (!p(elems1.next, elems2.next)) return false
+      true
+    }
+    def exists(p: (A1, A2) => Boolean): Boolean = {
+      val elems1 = tuple._1.elements
+      val elems2 = tuple._2.elements
+      while (elems1.hasNext && elems2.hasNext)
+        if (p(elems1.next, elems2.next)) return true
+      false
+    }
+  }
+  implicit def tupleOfIterableWrapper[CC[+B] <: Iterable[B] with IterableTemplate[CC, B], A1, A2](tuple: (CC[A1], Iterable[A2])) =
+    new IterableOps[CC, A1, A2](tuple)
+
+
+/* A more general version which will probably not work.
+  implicit def tupleOfIterableWrapper[CC[+B] <: Iterable[B] with IterableTemplate[CC, B], A1, A2, B1 <: CC[A1]](tuple: B1, Iterable[A2]) =
+    new IterableOps[CC, A1, A2](tuple)
+*/
+
+  // Adriaan: If you drop the type parameters it will infer the wrong types.
+  tupleOfIterableWrapper[collection.immutable.List, Int, Int]((collection.immutable.Nil, collection.immutable.Nil)) forall (_ + _ < 10)
+}
+
+/** Tuple2 is the canonical representation of a @see Product2
+ *
+ */
+case class Tuple2[+T1, +T2](_1:T1, _2:T2)
+  extends Product2[T1, T2]  {
+
+   override def toString() = {
+     val sb = new StringBuilder
+     sb.append('(').append(_1).append(',').append(_2).append(')')
+     sb.toString
+   }
+
+  /** Swap the elements of the tuple */
+  def swap: Tuple2[T2,T1] = Tuple2(_2, _1)
+
+}