Complicated Task Group

ComplicatedTaskGroup.swift

try await withThrowingTaskGroup(of: LoginTaskResult.self) { group in
    group.addTask(operation: fetchLocation)
    group.addTask(operation: askForUserPermissions)
    group.addTask(priority: .high) {
        return .client(try await APIClient.connect())
    }
    var client: APIClient!
    for try await result in group {
        if case LoginTaskResult.client(let api) = result {
            client = api
            break
        }
    }
    let tracer = client.traceEvent
    group.addTask(operation: client.logUserIn)
    group.addTask {
        try await tracer(.login)
    }
    try await group.waitForAll()
    _ = try await tracer(.completedLoginSequence)
}