Constructor decorators

[littledan]

Previous discussion: tc39/proposal-decorators-previous#23

Is this OK to leave for v2?

[bmeck]

I'd would prefer to leave it for a follow on.

That said, I do like to delete MyClass.constructor somewhat often so it is tempting.

[littledan]

Hmm, we might be able to accommodate that particular case, by putting the constructor property in the elements list (as a "prototype method")... then a @noconstructor class decorator could remove that. Thoughts?

[ljharb]

I think for now you could do that with a class decorator, since the class is the constructor function, no?

[littledan]

You mean with a finalizer which deletes the property? Yes, that is possible already, you are right.

[jsg2021]

@bmeck What does that do? Block the class from being instantiated?

[erights]

With @noconstructor, access to an instance no longer automatically implies access to that instance's constructor. IOW, for @noconstructor class Foo, I can give you access to an instance of Foo while denying you access to the Foo constructor, i.e., to the class object.