Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Add reverse method to NonEmptyTuple #13752

Merged
merged 9 commits into from
Jul 3, 2023
Merged

Add reverse method to NonEmptyTuple #13752

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
9 commits
Select commit Hold shift + click to select a range
d8dfef6
Add reverse method to NonEmptyTuple
danicheg Oct 15, 2021
ebd5f2b
Merge branch 'master' into tuple-reverse
danicheg Oct 22, 2021
ab1a19f
Update MiMa filters
danicheg Oct 22, 2021
ebf8d8c
Merge branch main
danicheg May 14, 2023
a1d8b66
Address review comments
danicheg May 14, 2023
5006b2f
Remove wrong branch in Tuples#xxlReverse
danicheg May 17, 2023
cb2f91f
Merge branch 'main' into tuple-reverse
danicheg Jul 2, 2023
6aef25a
Move reverse method to Tuple
danicheg Jul 2, 2023
ae14dab
Add one more test
danicheg Jul 2, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
23 changes: 21 additions & 2 deletions library/src/scala/Tuple.scala
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
package scala

import annotation.showAsInfix
import annotation.{experimental, showAsInfix}
import compiletime._
import compiletime.ops.int._

Expand Down Expand Up @@ -78,6 +78,13 @@ sealed trait Tuple extends Product {
*/
inline def splitAt[This >: this.type <: Tuple](n: Int): Split[This, n.type] =
runtime.Tuples.splitAt(this, n).asInstanceOf[Split[This, n.type]]

/** Given a tuple `(a1, ..., am)`, returns the reversed tuple `(am, ..., a1)`
* consisting all its elements.
*/
@experimental
inline def reverse[This >: this.type <: Tuple]: Reverse[This] =
runtime.Tuples.reverse(this).asInstanceOf[Reverse[This]]
}

object Tuple {
Expand Down Expand Up @@ -193,6 +200,19 @@ object Tuple {
*/
type IsMappedBy[F[_]] = [X <: Tuple] =>> X =:= Map[InverseMap[X, F], F]

/** Type of the reversed tuple */
@experimental
type Reverse[X <: Tuple] = Helpers.ReverseImpl[EmptyTuple, X]

@experimental
object Helpers:

/** Type of the reversed tuple */
@experimental
type ReverseImpl[Acc <: Tuple, X <: Tuple] <: Tuple = X match
case x *: xs => ReverseImpl[x *: Acc, xs]
case EmptyTuple => Acc

/** Transforms a tuple `(T1, ..., Tn)` into `(T1, ..., Ti)`. */
type Take[T <: Tuple, N <: Int] <: Tuple = N match {
case 0 => EmptyTuple
Expand Down Expand Up @@ -297,7 +317,6 @@ sealed trait NonEmptyTuple extends Tuple {
*/
inline def tail[This >: this.type <: NonEmptyTuple]: Tail[This] =
runtime.Tuples.tail(this).asInstanceOf[Tail[This]]

}

@showAsInfix
Expand Down
64 changes: 64 additions & 0 deletions library/src/scala/runtime/Tuples.scala
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,5 +1,7 @@
package scala.runtime

import scala.annotation.experimental

object Tuples {

inline val MaxSpecialized = 22
Expand Down Expand Up @@ -447,6 +449,68 @@ object Tuples {
}
}

// Reverse for TupleXXL
private def xxlReverse(xxl: TupleXXL): Tuple =
TupleXXL.fromIArray(xxl.elems.reverse.asInstanceOf[IArray[Object]]).asInstanceOf[Tuple]

// Reverse for Tuple0 to Tuple22
private def specialCaseReverse(self: Tuple): Tuple = {
(self: Any) match {
case EmptyTuple =>
EmptyTuple
case self: Tuple1[_] =>
self
case self: Tuple2[_, _] =>
Tuple2(self._2, self._1)
case self: Tuple3[_, _, _] =>
Tuple3(self._3, self._2, self._1)
case self: Tuple4[_, _, _, _] =>
Tuple4(self._4, self._3, self._2, self._1)
case self: Tuple5[_, _, _, _, _] =>
Tuple5(self._5, self._4, self._3, self._2, self._1)
case self: Tuple6[_, _, _, _, _, _] =>
Tuple6(self._6, self._5, self._4, self._3, self._2, self._1)
case self: Tuple7[_, _, _, _, _, _, _] =>
Tuple7(self._7, self._6, self._5, self._4, self._3, self._2, self._1)
case self: Tuple8[_, _, _, _, _, _, _, _] =>
Tuple8(self._8, self._7, self._6, self._5, self._4, self._3, self._2, self._1)
case self: Tuple9[_, _, _, _, _, _, _, _, _] =>
Tuple9(self._9, self._8, self._7, self._6, self._5, self._4, self._3, self._2, self._1)
case self: Tuple10[_, _, _, _, _, _, _, _, _, _] =>
Tuple10(self._10, self._9, self._8, self._7, self._6, self._5, self._4, self._3, self._2, self._1)
case self: Tuple11[_, _, _, _, _, _, _, _, _, _, _] =>
Tuple11(self._11, self._10, self._9, self._8, self._7, self._6, self._5, self._4, self._3, self._2, self._1)
case self: Tuple12[_, _, _, _, _, _, _, _, _, _, _, _] =>
Tuple12(self._12, self._11, self._10, self._9, self._8, self._7, self._6, self._5, self._4, self._3, self._2, self._1)
case self: Tuple13[_, _, _, _, _, _, _, _, _, _, _, _, _] =>
Tuple13(self._13, self._12, self._11, self._10, self._9, self._8, self._7, self._6, self._5, self._4, self._3, self._2, self._1)
case self: Tuple14[_, _, _, _, _, _, _, _, _, _, _, _, _, _] =>
Tuple14(self._14, self._13, self._12, self._11, self._10, self._9, self._8, self._7, self._6, self._5, self._4, self._3, self._2, self._1)
case self: Tuple15[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _] =>
Tuple15(self._15, self._14, self._13, self._12, self._11, self._10, self._9, self._8, self._7, self._6, self._5, self._4, self._3, self._2, self._1)
case self: Tuple16[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _] =>
Tuple16(self._16, self._15, self._14, self._13, self._12, self._11, self._10, self._9, self._8, self._7, self._6, self._5, self._4, self._3, self._2, self._1)
case self: Tuple17[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _] =>
Tuple17(self._17, self._16, self._15, self._14, self._13, self._12, self._11, self._10, self._9, self._8, self._7, self._6, self._5, self._4, self._3, self._2, self._1)
case self: Tuple18[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _] =>
Tuple18(self._18, self._17, self._16, self._15, self._14, self._13, self._12, self._11, self._10, self._9, self._8, self._7, self._6, self._5, self._4, self._3, self._2, self._1)
case self: Tuple19[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _] =>
Tuple19(self._19, self._18, self._17, self._16, self._15, self._14, self._13, self._12, self._11, self._10, self._9, self._8, self._7, self._6, self._5, self._4, self._3, self._2, self._1)
case self: Tuple20[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _] =>
Tuple20(self._20, self._19, self._18, self._17, self._16, self._15, self._14, self._13, self._12, self._11, self._10, self._9, self._8, self._7, self._6, self._5, self._4, self._3, self._2, self._1)
case self: Tuple21[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _] =>
Tuple21(self._21, self._20, self._19, self._18, self._17, self._16, self._15, self._14, self._13, self._12, self._11, self._10, self._9, self._8, self._7, self._6, self._5, self._4, self._3, self._2, self._1)
case self: Tuple22[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _] =>
Tuple22(self._22, self._21, self._20, self._19, self._18, self._17, self._16, self._15, self._14, self._13, self._12, self._11, self._10, self._9, self._8, self._7, self._6, self._5, self._4, self._3, self._2, self._1)
}
}

@experimental
def reverse(self: Tuple): Tuple = (self: Any) match {
case xxl: TupleXXL => xxlReverse(xxl)
case _ => specialCaseReverse(self)
}

// Init for Tuple1 to Tuple22
private def specialCaseInit(self: Tuple): Tuple = {
(self: Any) match {
Expand Down
2 changes: 2 additions & 0 deletions project/MiMaFilters.scala
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,8 @@ object MiMaFilters {
ProblemFilters.exclude[MissingClassProblem]("scala.runtime.stdLibPatches.language$experimental$clauseInterleaving$"),
ProblemFilters.exclude[MissingFieldProblem]("scala.runtime.stdLibPatches.language#experimental.relaxedExtensionImports"),
ProblemFilters.exclude[MissingClassProblem]("scala.runtime.stdLibPatches.language$experimental$relaxedExtensionImports$"),
ProblemFilters.exclude[DirectMissingMethodProblem]("scala.runtime.Tuples.reverse"),
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Suggested change
ProblemFilters.exclude[DirectMissingMethodProblem]("scala.runtime.Tuples.reverse"),

ProblemFilters.exclude[MissingFieldProblem]("scala.Tuple.Helpers"),
// end of New experimental features in 3.3.X
)
val TastyCore: Seq[ProblemFilter] = Seq(
Expand Down
10 changes: 9 additions & 1 deletion tests/run-custom-args/tasty-inspector/stdlibExperimentalDefinitions.scala
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -99,7 +99,15 @@ val experimentalDefinitionInLibrary = Set(
"scala.quoted.Quotes.reflectModule.MethodTypeMethods.hasErasedParams",
"scala.quoted.Quotes.reflectModule.TermParamClauseMethods.erasedArgs",
"scala.quoted.Quotes.reflectModule.TermParamClauseMethods.hasErasedArgs",
"scala.quoted.Quotes.reflectModule.defnModule.ErasedFunctionClass"
"scala.quoted.Quotes.reflectModule.defnModule.ErasedFunctionClass",

// New feature: reverse method on Tuple
"scala.Tuple.reverse",
"scala.Tuple$.Helpers",
"scala.Tuple$.Helpers$",
"scala.Tuple$.Helpers$.ReverseImpl",
"scala.Tuple$.Reverse",
"scala.runtime.Tuples$.reverse"
)


Expand Down
78 changes: 78 additions & 0 deletions tests/run-deep-subtype/Tuple-reverse.check
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,78 @@
(0)
(0,0)
(1,0,0)
(2,1,0,0)
(3,2,1,0,0)
(4,3,2,1,0,0)
(5,4,3,2,1,0,0)
(6,5,4,3,2,1,0,0)
(7,6,5,4,3,2,1,0,0)
(8,7,6,5,4,3,2,1,0,0)
(9,8,7,6,5,4,3,2,1,0,0)
(10,9,8,7,6,5,4,3,2,1,0,0)
(11,10,9,8,7,6,5,4,3,2,1,0,0)
(12,11,10,9,8,7,6,5,4,3,2,1,0,0)
(13,12,11,10,9,8,7,6,5,4,3,2,1,0,0)
(14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,0)
(15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,0)
(16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,0)
(17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,0)
(18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,0)
(19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,0)
(20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,0)
(21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,0)
(22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,0)
(23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,0)
(24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,0)
()
(1)
(2,1)
(3,2,1)
(4,3,2,1)
(5,4,3,2,1)
(6,5,4,3,2,1)
(7,6,5,4,3,2,1)
(8,7,6,5,4,3,2,1)
(9,8,7,6,5,4,3,2,1)
(10,9,8,7,6,5,4,3,2,1)
(11,10,9,8,7,6,5,4,3,2,1)
(12,11,10,9,8,7,6,5,4,3,2,1)
(13,12,11,10,9,8,7,6,5,4,3,2,1)
(14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
()
(1)
(2,1)
(3,2,1)
(4,3,2,1)
(5,4,3,2,1)
(6,5,4,3,2,1)
(7,6,5,4,3,2,1)
(8,7,6,5,4,3,2,1)
(9,8,7,6,5,4,3,2,1)
(10,9,8,7,6,5,4,3,2,1)
(11,10,9,8,7,6,5,4,3,2,1)
(12,11,10,9,8,7,6,5,4,3,2,1)
(13,12,11,10,9,8,7,6,5,4,3,2,1)
(14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
(25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
73 changes: 73 additions & 0 deletions tests/run-deep-subtype/Tuple-reverse.scala
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,73 @@
import scala.reflect.ClassTag

object Test {
def main(args: Array[String]): Unit = {

def testArray[T: ClassTag](n: Int, elem: Int => T): Unit = {
val t: Int *: Tuple = 0 *: Tuple.fromArray(Array.tabulate(n)(elem))
println(t.reverse)
}

for (i <- 0 to 25)
testArray(i, j => j)

val tuple: Tuple3[Int, Boolean, String] = (1, true, "hello")
val reversedTuple: Tuple3[String, Boolean, Int] = tuple.reverse

assert(reversedTuple == ("hello", true, 1))

println(EmptyTuple.reverse)
println(Tuple1(1).reverse)
bishabosha marked this conversation as resolved.
Show resolved Hide resolved
println((1, 2).reverse)
println((1, 2, 3).reverse)
println((1, 2, 3, 4).reverse)
println((1, 2, 3, 4, 5).reverse)
println((1, 2, 3, 4, 5, 6).reverse)
println((1, 2, 3, 4, 5, 6, 7).reverse)
println((1, 2, 3, 4, 5, 6, 7, 8).reverse)
println((1, 2, 3, 4, 5, 6, 7, 8, 9).reverse)
println((1, 2, 3, 4, 5, 6, 7, 8, 9, 10).reverse)
println((1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11).reverse)
println((1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12).reverse)
println((1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13).reverse)
println((1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14).reverse)
println((1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15).reverse)
println((1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16).reverse)
println((1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17).reverse)
println((1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18).reverse)
println((1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19).reverse)
println((1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20).reverse)
println((1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21).reverse)
println((1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22).reverse)
println((1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23).reverse)
println((1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24).reverse)
println((1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25).reverse)

println(Tuple().reverse)
println((1 *: Tuple()).reverse)
println((1 *: 2 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: 6 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: 6 *: 7 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: 6 *: 7 *: 8 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: 6 *: 7 *: 8 *: 9 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: 6 *: 7 *: 8 *: 9 *: 10 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: 6 *: 7 *: 8 *: 9 *: 10 *: 11 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: 6 *: 7 *: 8 *: 9 *: 10 *: 11 *: 12 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: 6 *: 7 *: 8 *: 9 *: 10 *: 11 *: 12 *: 13 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: 6 *: 7 *: 8 *: 9 *: 10 *: 11 *: 12 *: 13 *: 14 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: 6 *: 7 *: 8 *: 9 *: 10 *: 11 *: 12 *: 13 *: 14 *: 15 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: 6 *: 7 *: 8 *: 9 *: 10 *: 11 *: 12 *: 13 *: 14 *: 15 *: 16 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: 6 *: 7 *: 8 *: 9 *: 10 *: 11 *: 12 *: 13 *: 14 *: 15 *: 16 *: 17 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: 6 *: 7 *: 8 *: 9 *: 10 *: 11 *: 12 *: 13 *: 14 *: 15 *: 16 *: 17 *: 18 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: 6 *: 7 *: 8 *: 9 *: 10 *: 11 *: 12 *: 13 *: 14 *: 15 *: 16 *: 17 *: 18 *: 19 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: 6 *: 7 *: 8 *: 9 *: 10 *: 11 *: 12 *: 13 *: 14 *: 15 *: 16 *: 17 *: 18 *: 19 *: 20 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: 6 *: 7 *: 8 *: 9 *: 10 *: 11 *: 12 *: 13 *: 14 *: 15 *: 16 *: 17 *: 18 *: 19 *: 20 *: 21 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: 6 *: 7 *: 8 *: 9 *: 10 *: 11 *: 12 *: 13 *: 14 *: 15 *: 16 *: 17 *: 18 *: 19 *: 20 *: 21 *: 22 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: 6 *: 7 *: 8 *: 9 *: 10 *: 11 *: 12 *: 13 *: 14 *: 15 *: 16 *: 17 *: 18 *: 19 *: 20 *: 21 *: 22 *: 23 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: 6 *: 7 *: 8 *: 9 *: 10 *: 11 *: 12 *: 13 *: 14 *: 15 *: 16 *: 17 *: 18 *: 19 *: 20 *: 21 *: 22 *: 23 *: 24 *: Tuple()).reverse)
println((1 *: 2 *: 3 *: 4 *: 5 *: 6 *: 7 *: 8 *: 9 *: 10 *: 11 *: 12 *: 13 *: 14 *: 15 *: 16 *: 17 *: 18 *: 19 *: 20 *: 21 *: 22 *: 23 *: 24 *: 25 *: Tuple()).reverse)
}
}