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Comments (3)

Gedochao avatar Gedochao commented on August 25, 2024

@goshacodes how exactly to reproduce the tuples from your generated code example?

from scala3.

goshacodes avatar goshacodes commented on August 25, 2024

I'll return with example today

from scala3.

goshacodes avatar goshacodes commented on August 25, 2024
object Example:
  inline def example: Unit =
    ${ ExampleMacro.example }


object ExampleMacro:
  def example(using quotes: Quotes): Expr[Unit] =
    import quotes.reflect.*
    val term = ValDef.let(
      Symbol.spliceOwner,
      List('{5}.asTerm, '{"foo"}.asTerm)
    ) { refs =>
      refs.foldRight[Term]('{ EmptyTuple }.asTerm) { (el, acc) =>
        Select.unique(acc, "*:")
          .appliedToTypes(List(el.tpe, acc.tpe))
          .appliedToArgs(List(el))
      }
    }
    '{println(${Expr(term.show(using Printer.TreeAnsiCode)})}

output:

{
  val x: scala.Int = 5
  val `x₂`: java.lang.String = "foo"
  scala.Tuple$package.EmptyTuple.*:[x.type, scala.Tuple$package.EmptyTuple.type](`x₂`).*:[x.type, scala.*:[x, scala.Tuple$package.EmptyTuple]](x)
}

expected:

(x, x2) or at least x *: x2 *: EmptyTuple

from scala3.

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