Moved unlift to the Function companion object, ...

Moved unlift to the Function companion object, which might have been
better in the first place. Had to make a minor change to genprod, and
then I couldn't escape that unscathed. Finished the not very complete
undertaking I found there to update the scaladoc. Lots of little changes
to the generated text and code.

I changed genprod to only put a unique stamp on Function0 so we can stop
having a 100 file diff everytime an i is dotted somewhere.

Closes #3825, no review.

1 files changed, 71 insertions, 55 deletions

diff --git a/src/library/scala/Product22.scala b/src/library/scala/Product22.scala
index e8f7879d5e..46038bf1a2 100644
--- a/src/library/scala/Product22.scala
+++ b/src/library/scala/Product22.scala
@@ -5,36 +5,30 @@
 ** /____/\___/_/ |_/____/_/ | |                                         **
 **                          |/                                          **
 \*                                                                      */
-
-// generated by genprod on Sat Oct 16 11:19:09 PDT 2010
+// GENERATED CODE: DO NOT EDIT. See scala.Function0 for timestamp.
 
 package scala
 
-
-
 object Product22 {
   def unapply[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22](x: Product22[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22]): Option[Product22[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22]] =
     Some(x)
 }
 
 /** Product22 is a cartesian product of 22 components.
- *
  *  @since 2.3
  */
 trait Product22[+T1, +T2, +T3, +T4, +T5, +T6, +T7, +T8, +T9, +T10, +T11, +T12, +T13, +T14, +T15, +T16, +T17, +T18, +T19, +T20, +T21, +T22] extends Product {
-  /**
-   *  The arity of this product.
+  /** The arity of this product.
    *  @return 22
    */
   override def productArity = 22
 
 
-  /**
-   *  Returns the n-th projection of this product if 0 < n <= productArity,
-   *  otherwise throws IndexOutOfBoundsException.
+  /** Returns the n-th projection of this product if 0 < n <= productArity,
+   *  otherwise throws an `IndexOutOfBoundsException`.
    *
    *  @param n number of the projection to be returned
-   *  @return  same as _(n+1)
+   *  @return  same as `._(n+1)`, for example `productElement(1)` is the same as `._1`.
    *  @throws  IndexOutOfBoundsException
    */
 
@@ -65,72 +59,94 @@ trait Product22[+T1, +T2, +T3, +T4, +T5, +T6, +T7, +T8, +T9, +T10, +T11, +T12, +
     case _ => throw new IndexOutOfBoundsException(n.toString())
  }
 
-  /** projection of this product */
+  /** A projection of element 1 of this Product.
+   *  @return   A projection of element 1.
+   */
   def _1: T1
-
-  /** projection of this product */
+  /** A projection of element 2 of this Product.
+   *  @return   A projection of element 2.
+   */
   def _2: T2
-
-  /** projection of this product */
+  /** A projection of element 3 of this Product.
+   *  @return   A projection of element 3.
+   */
   def _3: T3
-
-  /** projection of this product */
+  /** A projection of element 4 of this Product.
+   *  @return   A projection of element 4.
+   */
   def _4: T4
-
-  /** projection of this product */
+  /** A projection of element 5 of this Product.
+   *  @return   A projection of element 5.
+   */
   def _5: T5
-
-  /** projection of this product */
+  /** A projection of element 6 of this Product.
+   *  @return   A projection of element 6.
+   */
   def _6: T6
-
-  /** projection of this product */
+  /** A projection of element 7 of this Product.
+   *  @return   A projection of element 7.
+   */
   def _7: T7
-
-  /** projection of this product */
+  /** A projection of element 8 of this Product.
+   *  @return   A projection of element 8.
+   */
   def _8: T8
-
-  /** projection of this product */
+  /** A projection of element 9 of this Product.
+   *  @return   A projection of element 9.
+   */
   def _9: T9
-
-  /** projection of this product */
+  /** A projection of element 10 of this Product.
+   *  @return   A projection of element 10.
+   */
   def _10: T10
-
-  /** projection of this product */
+  /** A projection of element 11 of this Product.
+   *  @return   A projection of element 11.
+   */
   def _11: T11
-
-  /** projection of this product */
+  /** A projection of element 12 of this Product.
+   *  @return   A projection of element 12.
+   */
   def _12: T12
-
-  /** projection of this product */
+  /** A projection of element 13 of this Product.
+   *  @return   A projection of element 13.
+   */
   def _13: T13
-
-  /** projection of this product */
+  /** A projection of element 14 of this Product.
+   *  @return   A projection of element 14.
+   */
   def _14: T14
-
-  /** projection of this product */
+  /** A projection of element 15 of this Product.
+   *  @return   A projection of element 15.
+   */
   def _15: T15
-
-  /** projection of this product */
+  /** A projection of element 16 of this Product.
+   *  @return   A projection of element 16.
+   */
   def _16: T16
-
-  /** projection of this product */
+  /** A projection of element 17 of this Product.
+   *  @return   A projection of element 17.
+   */
   def _17: T17
-
-  /** projection of this product */
+  /** A projection of element 18 of this Product.
+   *  @return   A projection of element 18.
+   */
   def _18: T18
-
-  /** projection of this product */
+  /** A projection of element 19 of this Product.
+   *  @return   A projection of element 19.
+   */
   def _19: T19
-
-  /** projection of this product */
+  /** A projection of element 20 of this Product.
+   *  @return   A projection of element 20.
+   */
   def _20: T20
-
-  /** projection of this product */
+  /** A projection of element 21 of this Product.
+   *  @return   A projection of element 21.
+   */
   def _21: T21
-
-  /** projection of this product */
+  /** A projection of element 22 of this Product.
+   *  @return   A projection of element 22.
+   */
   def _22: T22
 
 
-
 }