Le 29 juin 2014 à 04:46, Kevin Smith <[email protected]> a écrit :
> Thanks Claude for working this up. > > > InitializeThisBindings(nonconstructedObj, obj) abstract operation > ---------------------------------------------------------------------- > > This operation performs the actual initialisation of the this-bindings that > were previously deferred: > > 1. Assert `nonconstructedThisObj` is a Non-Constructed Object. > 2. Assert `obj` is an ordinary object. > 3. Replace all references to `nonconstructedThisObj` with references to > `obj`. > (In particular, this step will effectively initialise the this-binding > of every function environment record that used to reference > `nonconstructedObj`.) > > I was vaguely thinking along similar lines last week, but was stumped at this > point. Is step #3 possible? You'd basically have to (magically?) replace > the "this" binding for any subclass constructors on the call stack. This is > probably a question for Allen. > In fact, what I really need, is that the this-binding acts like a const-binding: It may be uninitialised at first, and will be initialised after the first call to a `super`-method (in most non-buggy code, it will be the super-constructor). —Claude
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