Swift Structured Concurrency - Task Auto Cancellation

TaskAutoCancellation.swift

public extension Task {
    /// Cancels this `Task` when the surrounding `Task` is cancelled.
    /// This is necessary if `Task {}` and `Task.detached {}`
    /// should be automatically cancelled - otherwise, such Tasks
    /// just run until finished.
    ///
    /// Usage:
    ///
    ///     await Task { await myAsyncFunc() }.autoCancel()
    func autoCancel() async -> Void  {
        await withTaskCancellationHandler(
            handler: { self.cancel() },
            operation: { () }
        )
    }

    /// Returns this `Task`'s result and cancels this `Task` when
    /// the surrounding `Task` is cancelled. This is necessary if
    /// `Task {}` and `Task.detached {}` should be automatically
    /// cancelled - otherwise, such Tasks just run until finished.
    ///
    /// Usage:
    ///
    ///     let result = await Task { await myAsyncFunc() }
    ///         .resultWithAutoCancel
    var resultWithAutoCancel: Result<Success, Failure> {
        get async {
            await withTaskCancellationHandler(
                handler: { self.cancel() },
                operation: { await self.result }
            )
        }
    }
}