closure isolation

[sophiapoirier]

No description provided.

[Joannis]

Does this imply the following scenarios?

func isolate(on otherActor: some AnyActor) {
  Task { [isolated otherActor] in
      // Valid
  }
}

func isolate(on otherActor: some AnyActor) {
  Task { [isolated otherActor] in
     self.bool.toggle() // Fails compilation because `otherActor` isolation does not match `self`'s isolation
  }
}

protocol Toggleable {
  func toggle()
}

func isolate(on otherActor: some AnyActor & Toggleable) {
  Task { [isolated otherActor] in
    otherActor.toggle() // Successful, because this Task is isolated to `otherActor`'s isolation
  }
}

[sophiapoirier]

(Let me preface by saying that this proposal isn't fully baked yet, hence not having been pitched or added anyone to the PR yet.)

The first example, it is unclear to me what is "valid" given that the body of the closure does not do anything? But the syntax for the isolation capture is valid, and the capture will be isolated to otherActor.

The second example correct will fail.

The third example yes correct as well.

[mattmassicotte]

These two examples both have a tiny typo in them. They are missing a -> Void.