(Crossposted to swift-users; swift-dev is for development of the Swift compiler
and standard library, not discussions about how to use Swift.)
> On Nov 4, 2016, at 2:57 AM, Anton Mironov via swift-dev <swift-...@swift.org>
> wrote:
>
> // This is workaround #1
> // It looks bad for 2 reasons: implicitly unwrapped optional, it is easy to
> forget to initialize object
> class ContextB : Context {
> var object: ObjectInContext!
>
> init() {
> self.object = ObjectInContext(context: self)
> }
> }
Try this:
class ContextB: Context {
private var _object: ObjectInContext?
var object: ObjectInContext { return _object! }
init() {
_object = nil
// Note that self is now fully initialized
_object = ObjectInContext(context: self)
}
}
As long as you can trust yourself not to forget to initialize `_object` within
`init()` or mutate `_object` within private scope, this is about as safe as
anything you could hope for.
--
Brent Royal-Gordon
Architechies
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