Structured background child task for synchronous function

Using Swift
6

In my other topic Returning non-Sendable object across actor boundaries via sending keyword I just learned that I can use async let in this case as well. Without a return type for the child task, it looks a bit ugly though:

@MainActor func main() {
    print(Thread.isMainThread)
    Task {
        async let _ = a()
    }
}

And if I wanted to await the child task before proceeding, I could write

async let a = a()
await a

with a compiler warning

Constant 'a' inferred to have type '()', which may be unexpected

If someone has a better solution, you're welcome to share it!