Defining function error using generics

问题

Here's the code:

extension Alamofire.Request {
public func responseObject<T: ResponseJSONObjectSerializable> (completionHandler: (NSURLRequest?, NSHTTPURLResponse?, Result<T> -> Void) -> Self {
//Error1: expected ',' separator
//Error2: expected parameter type following ':'

    ...

)
}

I'm using Swift 2.0, Alamofire 3.0, and SwiftyJSON.

回答1:

Problem solved: there's a mistake of parenthesis in the code, the ) should be place behind result<T> rather than the end of the function.

I thought it was some serious problem, took me a long time to find this. :P

来源：https://stackoverflow.com/questions/33010256/defining-function-error-using-generics