Macwire, wireWith and implicit parameters - scala

Question

wireWith seems to have some issues with resolving implicit parameters.
Minimal example:
import com.softwaremill.macwire._
object A {
def props(x: Int)(implicit y: String): A = new A(x)
}
class A(x: Int)(implicit y: String) {
val sum: String = s"$x + $y"
}
object App {
def main(): Unit = {
val xVal: Int = 3
implicit val yVal: String = "5"
// val aInstance = wire[A] // works
// val aInstance = A.props(xVal) // works
val aInstance: A = wireWith(A.props _) // compile error
println(aInstance.sum)
}
}
App.main()
Error:
Error:(21, 33) type mismatch; found : Int required: String
val aInstance: A = wireWith(A.props _)
^
If implicit is ommitted at yVal, it complains about missing implicit:
Error:(18, 36) could not find implicit value for parameter y: String
val aInstance: A = wireWith(A.props _) // compile error
^
This is a simplified example though - in my production code i try to wire Actor props:
object Actor {
def props
(dependency: Dependency, refreshInterval: FiniteDuration ## CacheRefreshInterval)
(implicit ec: ExecutionContext): Props =
Props(new Actor(dependency, refreshInterval))
}
// DI container
protected implicit def executionContext: ExecutionContext
protected lazy val dependency: Dependency = wire[Dependency]
protected lazy val refreshInterval = 2.second.taggedWith[CacheRefreshInterval]
protected lazy val actorProps: Props ## ActorProps = actorwireWith(Actor.props _)
and get different compile error:
too many arguments for method props: (implicit ec: scala.concurrent.ExecutionContext)akka.actor.Props
I've tried making implicit parameter explicit and it worked just fine, except it's a bit against usual practice of passing execution context implicitly.
Am I doing something wrong or is it an issue in macwire?
Issue in Github: https://github.com/adamw/macwire/issues/125

Answer 1

If you were using wireWith(A.props _) as a workaround for macwire's inability to wire actors when their constructor are using implicit parameters (see macwire issue 121), you could switch to macwire 2.3.1 and wire your actors using wireActor[A], wireAnonymousActor[A] or wireProps[A]. issue 121 was fixed in macwire 2.3.1.