Re: [RFC] [VOTE] Typed properties v2

On Tue, 11 Sep 2018 at 08:05, Bob Weinand <bobwei9@hotmail.com> wrote: > Hey, > > As announced, we are starting the vote on typed properties today. > > The voting period is two weeks, until sometime in the evening on Tuesday > 25-09-2018. > > Please find the RFC at https://wiki.php.net/rfc/typed_properties_v2.i°[ßýU > Ða€ƒ‡
·£¡ > For the record, I still think we will come to regret allowing non-nullable type hints without any constraint on the author of the class to initialise them correctly. As proposed, the invalid state may only be detected when it causes a runtime error in completely unrelated code. I gather that the authors of C# are currently going through a painful development phase to introduce better support for non-nullable types, and having to include many compromises and handle many edge-cases because it was not done earlier. I realise this case is not completely comparable, but we have an opportunity to get this right first time, and not just take the easy option. I am therefore going to make one last plea: if we don't yet know how to assert that complex types are initialised, do not allow them to be non-nullable in the first version of this feature. That is, allow class Foo { public ?Foo $foo = null; }, but not `class Foo { public Foo $foo; }`. This would still be a huge improvement to the language, but leaves us free to design additional features to prevent Unitialized Property Errors becoming as hated as Null Pointer Exceptions in Java or C#. Regards, -- Rowan Collins [IMSoP]