Fix #6506: Hide internal Tuple.fromArray implementation

library/src-3.x/scala/Tuple.scala

@@ -47,7 +47,7 @@ sealed trait Tuple extends Any {
         val t = asInstanceOf[Tuple4[_, _, _, _]]
         Tuple5(x, t._1, t._2, t._3, t._4).asInstanceOf[Result]
       case Some(n) =>
-        fromArray[H *: this.type](cons$Array(x, toArray))
+        knownTupleFromArray[H *: this.type](cons$Array(x, toArray))
       case _ =>
         runtime.DynamicTuple.dynamic_*:[This, H](this, x)
     }
@@ -93,7 +93,7 @@ sealed trait Tuple extends Any {
   }
 
   inline def genericConcat[T <: Tuple](xs: Tuple, ys: Tuple): Tuple =
-    fromArray[T](xs.toArray ++ ys.toArray)
+    knownTupleFromArray[T](xs.toArray ++ ys.toArray)
 
   inline def size[This >: this.type <: Tuple]: Size[This] = {
     type Result = Size[This]
@@ -164,7 +164,7 @@ object Tuple {
     elems1
   }
 
-  inline def fromArray[T <: Tuple](xs: Array[Object]): T =
+  private[scala] inline def knownTupleFromArray[T <: Tuple](xs: Array[Object]): T =
     inline constValue[BoundedSize[T]] match {
       case 0  => ().asInstanceOf[T]
       case 1  => Tuple1(xs(0)).asInstanceOf[T]
@@ -191,6 +191,15 @@ object Tuple {
       case 22 => Tuple22(xs(0), xs(1), xs(2), xs(3), xs(4), xs(5), xs(6), xs(7), xs(8), xs(9), xs(10), xs(11), xs(12), xs(13), xs(14), xs(15), xs(16), xs(17), xs(18), xs(19), xs(20), xs(21)).asInstanceOf[T]
       case _ => TupleXXL(xs).asInstanceOf[T]
     }
+
+  def fromArray[T](xs: Array[T]): Tuple = {
+    val xs2 = xs match {
+      case xs: Array[Object] => xs
+      case xs => xs.map(_.asInstanceOf[Object])
+    }
+    runtime.DynamicTuple.dynamicFromArray[Tuple](xs2)
+  }
+
 }
 
 sealed trait NonEmptyTuple extends Tuple {
@@ -240,7 +249,7 @@ sealed trait NonEmptyTuple extends Tuple {
         val t = asInstanceOf[Tuple5[_, _, _, _, _]]
         Tuple4(t._2, t._3, t._4, t._5).asInstanceOf[Result]
       case Some(n) if n > 5 =>
-        fromArray[Result](toArray.tail)
+        knownTupleFromArray[Result](toArray.tail)
       case None =>
         runtime.DynamicTuple.dynamicTail[This](this)
     }

tests/pos/i6506.scala

@@ -0,0 +1,3 @@
+object Test {
+  val t: Tuple = Tuple.fromArray(Array("1", "2", "3"))
+}

tests/run/Tuple-fromArray.check

@@ -0,0 +1,78 @@
+()
+(0)
+(0,1)
+(0,1,2)
+(0,1,2,3)
+(0,1,2,3,4)
+(0,1,2,3,4,5)
+(0,1,2,3,4,5,6)
+(0,1,2,3,4,5,6,7)
+(0,1,2,3,4,5,6,7,8)
+(0,1,2,3,4,5,6,7,8,9)
+(0,1,2,3,4,5,6,7,8,9,10)
+(0,1,2,3,4,5,6,7,8,9,10,11)
+(0,1,2,3,4,5,6,7,8,9,10,11,12)
+(0,1,2,3,4,5,6,7,8,9,10,11,12,13)
+(0,1,2,3,4,5,6,7,8,9,10,11,12,13,14)
+(0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15)
+(0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16)
+(0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17)
+(0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18)
+(0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19)
+(0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20)
+(0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21)
+(0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22)
+(0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23)
+(0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24)
+()
+(x0)
+(x0,x1)
+(x0,x1,x2)
+(x0,x1,x2,x3)
+(x0,x1,x2,x3,x4)
+(x0,x1,x2,x3,x4,x5)
+(x0,x1,x2,x3,x4,x5,x6)
+(x0,x1,x2,x3,x4,x5,x6,x7)
+(x0,x1,x2,x3,x4,x5,x6,x7,x8)
+(x0,x1,x2,x3,x4,x5,x6,x7,x8,x9)
+(x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10)
+(x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11)
+(x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12)
+(x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13)
+(x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14)
+(x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15)
+(x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15,x16)
+(x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15,x16,x17)
+(x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15,x16,x17,x18)
+(x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15,x16,x17,x18,x19)
+(x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15,x16,x17,x18,x19,x20)
+(x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15,x16,x17,x18,x19,x20,x21)
+(x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15,x16,x17,x18,x19,x20,x21,x22)
+(x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15,x16,x17,x18,x19,x20,x21,x22,x23)
+(x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15,x16,x17,x18,x19,x20,x21,x22,x23,x24)
+()
+(0)
+(0,x1)
+(0,x1,2)
+(0,x1,2,x3)
+(0,x1,2,x3,4)
+(0,x1,2,x3,4,x5)
+(0,x1,2,x3,4,x5,6)
+(0,x1,2,x3,4,x5,6,x7)
+(0,x1,2,x3,4,x5,6,x7,8)
+(0,x1,2,x3,4,x5,6,x7,8,x9)
+(0,x1,2,x3,4,x5,6,x7,8,x9,10)
+(0,x1,2,x3,4,x5,6,x7,8,x9,10,x11)
+(0,x1,2,x3,4,x5,6,x7,8,x9,10,x11,12)
+(0,x1,2,x3,4,x5,6,x7,8,x9,10,x11,12,x13)
+(0,x1,2,x3,4,x5,6,x7,8,x9,10,x11,12,x13,14)
+(0,x1,2,x3,4,x5,6,x7,8,x9,10,x11,12,x13,14,x15)
+(0,x1,2,x3,4,x5,6,x7,8,x9,10,x11,12,x13,14,x15,16)
+(0,x1,2,x3,4,x5,6,x7,8,x9,10,x11,12,x13,14,x15,16,x17)
+(0,x1,2,x3,4,x5,6,x7,8,x9,10,x11,12,x13,14,x15,16,x17,18)
+(0,x1,2,x3,4,x5,6,x7,8,x9,10,x11,12,x13,14,x15,16,x17,18,x19)
+(0,x1,2,x3,4,x5,6,x7,8,x9,10,x11,12,x13,14,x15,16,x17,18,x19,20)
+(0,x1,2,x3,4,x5,6,x7,8,x9,10,x11,12,x13,14,x15,16,x17,18,x19,20,x21)
+(0,x1,2,x3,4,x5,6,x7,8,x9,10,x11,12,x13,14,x15,16,x17,18,x19,20,x21,22)
+(0,x1,2,x3,4,x5,6,x7,8,x9,10,x11,12,x13,14,x15,16,x17,18,x19,20,x21,22,x23)
+(0,x1,2,x3,4,x5,6,x7,8,x9,10,x11,12,x13,14,x15,16,x17,18,x19,20,x21,22,x23,24)

tests/run/Tuple-fromArray.scala

@@ -0,0 +1,20 @@
+import scala.reflect.ClassTag
+
+object Test {
+  def main(args: Array[String]): Unit = {
+
+    def testArray[T: ClassTag](n: Int, elem: Int => T): Unit = {
+      val t: Tuple = Tuple.fromArray(Array.tabulate(n)(elem))
+      println(t)
+    }
+
+    for (i <- 0 to 25)
+      testArray(i, j => j)
+
+    for (i <- 0 to 25)
+      testArray(i, j => ("x" + j))
+
+    for (i <- 0 to 25)
+      testArray(i, j => if (j % 2 == 0) j else ("x" + j))
+  }
+}