> s === Object(s) This should throw a TypeError. In the case of a Symbol, `Object(*value*)` results in `ToObject(*value*)` [1]. And, in the case of Symbol, ToObject should throw a TypeError [2].
[1] http://people.mozilla.org/~jorendorff/es6-draft.html#sec-15.2.1.1 [2] http://people.mozilla.org/~jorendorff/es6-draft.html#sec-9.1.9 On Mon, Jul 15, 2013 at 10:48 AM, Mark S. Miller <[email protected]> wrote: > Given that s is a Symbol and b is a Bignum, is > > s === Object(s) > > ? > > Is > > b === Object(b) > > ? > > The reason I ask is that x === Object(x) is often used to distinguish > primitive values from objects. The other thing that's often used is typeof, > but these uses of typeof usually assume that the full range of possible > answers is already known. If we're going to be expanding the typeof > answers, then we need guidance on how to write this test now (es5) such > that it stays robust. > > > -- > Cheers, > --MarkM > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > > -- Jeremy Martin 661.312.3853 http://devsmash.com @jmar777
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