> Axel Rauschmayer wrote: >>> What's the underlying theory for extending instanceof? >> >> The idea would be to not use the proto chain (which would be odd for >> primitive values, anyway), to make these “pseudo-types” special. > > That's not much of a theory :-P. So hardcode two or three special cases? > Yikes.
With contracts/guards, it would be more than three cases. One could always introduce a protocol. I’m not saying that that’s the (only) way to do it, I’m just saying that it would be nice not to have to deal with the current “cross-frame, primitive vs. object, [[Class]] vs. instanceof” mess. typeof is already hard-coded. -- Dr. Axel Rauschmayer [email protected] home: rauschma.de twitter: twitter.com/rauschma blog: 2ality.com
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