[swift-users] Re-initializing lazy vars
joanna at carterconsulting.org.uk
Sat Oct 21 04:27:46 CDT 2017
> It just seems so obvious to create-if-nil, and makes it nice to reset stuff that should be re-created. In my case, after my NSURLSession gets invalidated, I wanted to set the property to nil, and next time a session was needed, it would just get created.
The only thing I would query with the whole concept of resetting an implicitly unwrapped optional var is, with a simple example struct :
public struct TestStruct
private var _description: String?
public var description: String!
return _description ?? ""
_description = newValue
… test code would be :
var test = TestStruct()
test.description = nil
let str: String = test.description
The idea of setting a var to nil and then getting a valid object back seems a bit anachronistic.
I think I would rather add an explicit "reset" method.
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