如何设置抛出错误的分离任务

Question

I'm trying to create a detached task that can throw an error. Here's a synthesized example of what I have.

 @MainActor
  var eventHandlerTask: Task<(), Never>? = nil

  func eventsHandler(events: [BEIEvent]) async throws {
    eventHandlerTask = Task.detached { [weak self] in
       throw NSError()
    }
  }

Xcode complains with: Invalid conversion from throwing function of type '@Sendable () throws -> Bool' to non-throwing function type '@Sendable () async -> Bool'

How can I setup a detached task that throws?

Answer 1

You have defined eventHandlerTask to have a Failure type of Never . So it cannot throw an error.

However, if you change Never to Error , then it can take a closure that throws errors:

var eventHandlerTask: Task<(), Error>?