On Jun 12, 2014, at 8:33 AM, André Bargull wrote: >> I'd be most interested in seeing if we can remove IsConstructor entirely >> (except for uses where it's just a guard, implementing the semantics of >> `new` via IsConstructor -> [[Construct]] or throw). >> >> It seems like there's at least some movement toward removing it from >> `Array.of` and `Array.from`. All that remains is its use to preserve the >> `arrayInstance.constructor = undefined` backward-compatibility >> possibilities. My preference would be to see if we can get away with >> breaking that use case, and reintroduce it if that turns out not to be >> web-compatible. > > The [[Realm]] check in Array.prototype.* is even more annoying than the > IsConstructor guard, but unfortunately required for web-compatibility per > [1]. :-( > > [1] http://esdiscuss.org/topic/array-prototype-slice-web-compat-issue
Yes! Please don't rock the boat with regard to this stuff. It's all there to address real compatibility issues. Allen
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