Andreas Rossberg (2015-01-19T10:58:27.000Z)
d at domenic.me (2015-01-28T19:33:36.261Z)
On 17 January 2015 at 19:14, Allen Wirfs-Brock <allen at wirfs-brock.com> wrote: > null is used to indicate no [[Prototype]], so it seem to me to be a better > match for this situation. Wouldn't the fact that null is a quasi-legal prototype strongly speak for using undefined here? Otherwise, it seems you couldn't distinguish Call invocations from Construct invocations with a prototype that has actually been set to null (which I suppose is legal?). (In terms of proper option/maybe types, this is yet another case of a None vs Some(None) distinction.)