我有这堂课：
export class Route <Req = any, Res = any, ReqBody = any, ResBody = any>{
requestClass: Req;
responseClass: Res;
requestBodyClass: ReqBody;
responseBodyClass: ResBody;
constructor(){
}
setRequestType(v: Req): Req {
this.requestClass = v;
return v;
}
setResponseType(v: Res): Res{
this.responseClass = v;
return v;
}
setResponseBodyType(s: ResBody): ResBody {
this.responseBodyClass = s;
return s;
}
setRequestBodyType(s: ReqBody): ReqBody {
this.requestBodyClass = s;
return s;
}
}
我的问题 - 有没有办法做这样的事情：
requestClass: Req;
responseClass: Res;
requestBodyClass: ReqBody !== any ? ReqBody : Req['body'];
responseBodyClass: ResBody !== any ? ResBody : Res['body'];
似乎不太可能我可以这样做，但如果用户没有为ReqBody或ResBody传递一个类型，我想默认为Req或Res上的body值，如果这是有意义的 .