Calling `self` inside a `struct` closure doesn't leak, because a `struct` is a value type, correct?

struct Foo {

  var handler: (() -> Void)?

  var bar: Bar // A class



  func doSomething() {

    bar.doSomething {

      self.handler?()  // <--- does it leak? 

    }

  }

}

Additionally, if the `handler` closure is set by an object, it requires `[weak self]` during its closure definition? (edited)