mirrors.scala

// using scala 3.1.0

import scala.deriving.Mirror

object Mirrors:

  extension [A <: Product](a: A)(using m: Mirror.ProductOf[A])
    def toTuple: m.MirroredElemTypes = Tuple.fromProductTyped(a)

  extension [T <: Tuple](t: T)
    def to[A <: Product](using m: Mirror.ProductOf[A], ev: m.MirroredElemTypes =:= T): A =
      m.fromProduct(t)


@main def main =
  import Mirrors.*

  case class Foo(x: Int, y: String, z: Boolean)
  println(Foo(42, "Hello", true).toTuple)
  println((42, "Hello", true).to[Foo])

// Alternatively, maybe this lands in Scala 3.2+ https://github.com/lampepfl/dotty/pull/14114