gistfile1.txt

/// Form task creation flags for use with the createAsyncTask builtins.
@available(SwiftStdlib 5.1, *)
@_alwaysEmitIntoClient
func taskCreateFlags(
  priority: TaskPriority?, isChildTask: Bool, copyTaskLocals: Bool,
  inheritContext: Bool, enqueueJob: Bool,
  addPendingGroupTaskUnconditionally: Bool,
  isDiscardingTask: Bool,
  isSynchronousStart: Bool
) -> Int {
  var bits = 0
  bits |= (bits & ~0xFF) | Int(priority?.rawValue ?? 0)
  if isChildTask {
    bits |= 1 << 8
  }
  if copyTaskLocals {
    bits |= 1 << 10
  }
  if inheritContext {
    bits |= 1 << 11
  }
  if enqueueJob {
    bits |= 1 << 12
  }
  if addPendingGroupTaskUnconditionally {
    bits |= 1 << 13
  }
  if isDiscardingTask {
    bits |= 1 << 14
  }
  // 15 is used by 'IsTaskFunctionConsumed'
  if isSynchronousStart {
    bits |= 1 << 16
  }
  return bits
}