在另一个协议中重用协议中的关联类型

protocol Requester {
    associatedtype requestType

    var response: ((requestType) -> ())? { get set }
}

protocol RequestProcesser: AnyObject {
    // Is it possible to define a associated type that is equal to the associated type of Requester?
    associatedtype requester: Requester

    // This associatedtype should always be equal to Requester.requestType
    associatedtype requestType

    var request: requester { get set }
}

extension RequestProcesser {
    func process() {
        request.response = { response in

            // Now I need to cast...
            // Is there any way around this?
            // the type of the response should be equal to requestType so the cast can be omitted right?
            let x = response as! requestType
        }
    }
}

正如您在代码中的注释中所看到的,我想知道是否可以约束associatedtypes,使其与其他协议中的其他associatedtypes相同。目标是省略演员阵容。现在,实现类可以为其选择不同的类型 requestType