Fail to find macro method when parameter is interface

[nicolasstucki]

trait Index
object Index {
  inline def succ(prev: Index): Unit = ~{ '(println("Ok")) }
}

object Test {
  def main(args: Array[String]): Unit = {
    Index.succ(null)
  }
}

fails with

3 |    Index.succ(null)
  |    ^^^^^^^^^^^^^^^^
  |Could not find interpreted method Index.succ with parameters List(interface Index)

[nicolasstucki]

As discussed, the solution is to call the methods on the module instance instead of the static methods.

Here we get the Class of the class (not module) and we use null to say that this is a static method. Instead we should return the class of the module and return the instance of that module by calling the MODULE$ method (or field) on it.