Swift 3.0 Error: Escaping closures can only capture inout parameters explicitly by value

Question

I\'m trying to update my project to Swift 3.0 but I have some difficulties. I\'m getting next error: \"Escaping closures can only capture inout parameters explicitly by valu

Answer 1

If you are sure that your variable will be available the whole time just use a true Pointer (same what inout actually does)

func foo(val: UnsafeMutablePointer, completion: @escaping (NSDictionary) -> Void) {
    val.pointee = NSDictionary()
    DispatchQueue.main.async {
        completion(val.pointee)
    }
}