SE-0304 (2nd review): Structured Concurrency

[benrimmington]

@ktoso

Having that said... it would be nice™ to not hardcode the apple naming of priorities; but it seems no-one so far really came up with a workable alternative design.

Would a floating-point value between 0.0 (lowest) and 1.0 (highest) be a workable design?

[Pitch #3] Structured Concurrency

URLSessionTask.priority is a floating-point value between 0.0 (lowest) and 1.0 (highest). Task.Priority could use similar names and raw values. For example: extension Task { public struct Priority: Hashable, RawRepresentable { public static let lowest: Self = 0.0 // background public static let low: Self = 0.25 // utility public static let medium: Self = 0.5 // default public static let high: Self = 0.75 // userInitiated public static let highest: Self = 1.0 …

On the other hand, Foundation.Thread has a similar threadPriority: Double property, but with different semantics.