Timothy Flynn 566a8dfd93 LibJS: Allow GeneratorObject to be subclassed ...

In the Iterator Helpers proposal, we must create a generator object with
additional internal slots and behavior differences.

GeneratorObject is currently implemented assuming it wraps around an
ECMAScriptFunctionObject with generated bytecode. In this proposal, we
instead have "Abstract Closure" blocks. So this marks the `execute`
method as virtual, to allow the future subclass to essentially just
invoke those closures.

We will also require mutable access to the [[GeneratorState]] internal
slot.

2023-07-16 23:56:55 +01:00

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