Scala 2.13.6 reports that "Auto-application to `()` s deprecated. Supply the empty argument list `()` explicitly to invoke method ..."

[jeffmay]

When attempting to use the wire[X] macro and I have all the required dependencies in scope, I expect to not see any compiler warnings.

Instead, I see:

[warn] ... Auto-application to `()` is deprecated. Supply the empty argument list `()` explicitly to invoke method validateOrThrow,
[warn] or remove the empty argument list from its definition (Java-defined methods are exempt).
[warn] In Scala 3, an unapplied method like this will be eta-expanded into a function.

[adamw]

Could you provide an example to reproduce?

[To-om]

I also have this warning on my project but I can't reproduce it in a minimalist project.

[To-om]

The warning comes when a module contains a def with empty parameter list:

import com.softwaremill.macwire._

class ClassA()
class ClassB(val a: ClassA)

@Module
class Module1 {
  def doSomething(): Unit = ()
  lazy val a: ClassA = wire[ClassA]
}

class Module2(m1: Module1) {
  lazy val b: ClassB = wire[ClassB]
}

[jeffmay]

Unfortunately, this upgrade did not work for my case. I'll open a separate issue with a specific example.