1

as the title. is it possible?

2

The question is rather terse... so it's hard to know what exactly you mean.

Recovering static isolation information from dynamic in a synchronous function is done by assumeIsolated: swift-evolution/proposals/0392-custom-actor-executors.md at main · apple/swift-evolution · GitHub

Otherwise, just write a function on the actor and call it.

There's soon going to be ways to "start Task on an actor" `@isolated(any)` function types if that's your question.

3

Yes, I don't see this feature at the current version.
if all the actor provides like static func run<T>(resultType: T.Type, body: () throws -> T) async rethrows -> T, from MainActor
I am expecting like:

func foo(actor: (any Actor)?) async {
    await type(of: actor)?.run {
        // run the code
    }
}
4

Make the actor parameter in foo isolated and you’re done. “Run” functions are an anti pattern imho

5

Depends what's you actually mean by "dynamically", as already being said. You can pass isolated Actor with latest release:

func foo(_: isolated Actor) async { 
    await doSmth()
}

In latest main branch there are available support for optionals, and #isolation to have inheritance.