On Jan 7, 2012, at 8:39 PM, Brendan Eich wrote: > Remember, we are not proposing breaking semantic shifts of meaning for > existing syntax. So the realistic worry is that you have code with > arguments[i] aliasing a formal, and this is required for correct operation, > and you then start using ES6 features (which imply ES5-strict), which breaks > arguments aliasing.
Hmmm, I was thinking this proposal implied much more of a breaking change (e.g. removing the global object from scope), but if the change in semantics largely comes down to enabling ES5-strict then maybe this isn't so bad. If we are talking about implicitly enabling ES5-strict for the whole program, I would think there may be a quite a few more hazards to consider? (code that implicitly introduces variables onto the global object, assumes this conversion to global object value in function calls, uses callee/caller/arguments, etc). Still, I'm warming up to the idea considerably if the implicit opt-in is triggering no major breaking changes. G. _______________________________________________ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss