Axel Rauschmayer wrote:
The (x === Object(x)) test evaluates to true for value objects in
this proposal, though. This may break code looking for "primitives"
but we need to see what such code expects. Is it filtering out the
legacy typeof-result primitives (plus "null"), trying to find values
for which typeof currently returns "object" or "function"? If so, I
don't see a problem: int64, bignum, etc. are not legacy primitives.
Is this test looking for objects that are their own wrappers? Again
all is well, unless "mutable wrapper" is assumed -- but that's not
safe in the ES5 era to assume, anyway.
The most frequent use case I’ve encountered: does the value have a
prototype (i.e., will Object.getPrototypeOf() work)?
I’m assuming that value objects will have a prototype, accessible via
Object.getPrototypeOf (?)
Yes, they are after all value objects :-P.
js> Object.getPrototypeOf(0UL)
0UL
/be
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