Move toTuple to Tuple companion

Author: anatoliykmetyuk

library/src/dotty/DottyPredef.scala

@@ -38,6 +38,4 @@ object DottyPredef {
 
   inline def the[T] given (x: T): x.type = x
 
-  def (p: P) toTuple[P <: Product] given (m: scala.deriving.Mirror.ProductOf[P]): m.MirroredElemTypes =
-    Tuple.fromArray(p.productIterator.toArray).asInstanceOf[m.MirroredElemTypes]
 }

library/src/scala/Tuple.scala

@@ -109,6 +109,8 @@ object Tuple {
   def fromProduct(product: Product): Tuple =
     runtime.DynamicTuple.dynamicFromProduct[Tuple](product)
 
+  def fromProductTyped[P <: Product](p: P) given (m: scala.deriving.Mirror.ProductOf[P]): m.MirroredElemTypes =
+    Tuple.fromArray(p.productIterator.toArray).asInstanceOf[m.MirroredElemTypes]
 }
 
 /** Tuple of arbitrary non-zero arity */

tests/neg/product-to-tuple.scala

@@ -1,8 +1,8 @@
 case class Foo(x: Int, y: String)
 
 val x = Foo(1, "2")
-val y: (Int, Boolean) = x.toTuple  // error
+val y: (Int, Boolean) = Tuple.fromProductTyped(x)  // error
 
 case class Bar[I <: Int, S <: String](x: I, y: S)
 val a: Bar[1, "2"] = Bar(1, "2")
-val b: (1, "3") = a.toTuple  // error
+val b: (1, "3") = Tuple.fromProductTyped(a)  // error

tests/pos/product-to-tuple.scala

@@ -1,8 +1,8 @@
 case class Foo(x: Int, y: String)
 
 val x = Foo(1, "2")
-val y: (Int, String) = x.toTuple
+val y: (Int, String) = Tuple.fromProductTyped(x)
 
 case class Bar[I <: Int, S <: String](x: I, y: S)
 val a: Bar[1, "2"] = Bar(1, "2")
-val b: (1, "2") = a.toTuple
+val b: (1, "2") = Tuple.fromProductTyped(a)