Restrict import suggestions or mention accessibility

[som-snytt]

Fixes #22429

by not suggesting inaccessible extension methods unless that's all you've got.

[som-snytt]

Just the accessibility test incurs a cycle.

[som-snytt]

i22920.scala

//> using options -Wunused:all -Vprint:typer import scala.util.* object delay { class Async[-Ctx, +A] @FunctionalInterface trait Callback[-A] { def complete(tr: Try[A]): Unit } implicit object syntax: extension [Ctx, A](inline async: Async[Ctx, A]) inline def run(using inline ctx: Ctx)(inline cb: Callback[A]): Unit = ??? /*  extension [Ctx, A](inline async: Async[Ctx, A])  inline def run(using inline ctx: Ctx)(inline cb: Callback[A]): Unit = ???  */ } @main def Test = { import delay.Async //val initializeOutbound: Async[Any, String] = ??? val initializeOutbound: Async[String, String] = ??? initializeOutbound.run: //delay.syntax.run(initializeOutbound): // shows No given instance for ctx, the underlying problem case Success(target) => ??? case Failure(exception) => ??? }

It suggests importing the extension, which is in implicit scope.

The messaging is slightly different in the Any version.