Is self captured within a nested function

Question

With closures I usually append [weak self] onto my capture list and then do a null check on self:

func myInstanceMethod() {     let myClosure =     {        [weak self] (result : Bool) in        if let this = self        {             this.anotherInstanceMethod()        }     }         functionExpectingClosure(myClosure) } 

How do I perform the null check on self if I'm using a nested function in lieu of a closure (or is the check even necessary...or is it even good practice to use a nested function like this) i.e.

func myInstanceMethod() {     func nestedFunction(result : Bool)     {         anotherInstanceMethod()     }      functionExpectingClosure(nestedFunction) } 

Answer 1

Unfortunately, only Closures have "Capture List" feature like [weak self]. For nested functions, You have to use normal weak or unowned variables.

func myInstanceMethod() {     weak var _self = self     func nestedFunction(result : Bool) {         _self?.anotherInstanceMethod()     }      functionExpectingClosure(nestedFunction) }